net/core/devlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * net/core/devlink.c - Network physical/parent device Netlink interface
   4  *
   5  * Heavily inspired by net/wireless/
   6  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
   7  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/slab.h>
  14 #include <linux/gfp.h>
  15 #include <linux/device.h>
  16 #include <linux/list.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/spinlock.h>
  19 #include <linux/refcount.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/u64_stats_sync.h>
  22 #include <linux/timekeeping.h>
  23 #include <rdma/ib_verbs.h>
  24 #include <net/netlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/rtnetlink.h>
  27 #include <net/net_namespace.h>
  28 #include <net/sock.h>
  29 #include <net/devlink.h>
  30 #include <net/drop_monitor.h>
  31 #define CREATE_TRACE_POINTS
  32 #include <trace/events/devlink.h>
  33
  34 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
  35         {
  36                 .name = "destination mac",
  37                 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
  38                 .bitwidth = 48,
  39         },
  40 };
  41
  42 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
  43         .name = "ethernet",
  44         .id = DEVLINK_DPIPE_HEADER_ETHERNET,
  45         .fields = devlink_dpipe_fields_ethernet,
  46         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
  47         .global = true,
  48 };
  49 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
  50
  51 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
  52         {
  53                 .name = "destination ip",
  54                 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
  55                 .bitwidth = 32,
  56         },
  57 };
  58
  59 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
  60         .name = "ipv4",
  61         .id = DEVLINK_DPIPE_HEADER_IPV4,
  62         .fields = devlink_dpipe_fields_ipv4,
  63         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
  64         .global = true,
  65 };
  66 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
  67
  68 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
  69         {
  70                 .name = "destination ip",
  71                 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
  72                 .bitwidth = 128,
  73         },
  74 };
  75
  76 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
  77         .name = "ipv6",
  78         .id = DEVLINK_DPIPE_HEADER_IPV6,
  79         .fields = devlink_dpipe_fields_ipv6,
  80         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
  81         .global = true,
  82 };
  83 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
  84
  85 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
  86 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
  87
  88 static LIST_HEAD(devlink_list);
  89
  90 /* devlink_mutex
  91  *
  92  * An overall lock guarding every operation coming from userspace.
  93  * It also guards devlink devices list and it is taken when
  94  * driver registers/unregisters it.
  95  */
  96 static DEFINE_MUTEX(devlink_mutex);
  97
  98 struct net *devlink_net(const struct devlink *devlink)
  99 {
 100         return read_pnet(&devlink->_net);
 101 }
 102 EXPORT_SYMBOL_GPL(devlink_net);
 103
 104 static void __devlink_net_set(struct devlink *devlink, struct net *net)
 105 {
 106         write_pnet(&devlink->_net, net);
 107 }
 108
 109 void devlink_net_set(struct devlink *devlink, struct net *net)
 110 {
 111         if (WARN_ON(devlink->registered))
 112                 return;
 113         __devlink_net_set(devlink, net);
 114 }
 115 EXPORT_SYMBOL_GPL(devlink_net_set);
 116
 117 static struct devlink *devlink_get_from_attrs(struct net *net,
 118                                               struct nlattr **attrs)
 119 {
 120         struct devlink *devlink;
 121         char *busname;
 122         char *devname;
 123
 124         if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
 125                 return ERR_PTR(-EINVAL);
 126
 127         busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
 128         devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
 129
 130         lockdep_assert_held(&devlink_mutex);
 131
 132         list_for_each_entry(devlink, &devlink_list, list) {
 133                 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
 134                     strcmp(dev_name(devlink->dev), devname) == 0 &&
 135                     net_eq(devlink_net(devlink), net))
 136                         return devlink;
 137         }
 138
 139         return ERR_PTR(-ENODEV);
 140 }
 141
 142 static struct devlink *devlink_get_from_info(struct genl_info *info)
 143 {
 144         return devlink_get_from_attrs(genl_info_net(info), info->attrs);
 145 }
 146
 147 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
 148                                                       unsigned int port_index)
 149 {
 150         struct devlink_port *devlink_port;
 151
 152         list_for_each_entry(devlink_port, &devlink->port_list, list) {
 153                 if (devlink_port->index == port_index)
 154                         return devlink_port;
 155         }
 156         return NULL;
 157 }
 158
 159 static bool devlink_port_index_exists(struct devlink *devlink,
 160                                       unsigned int port_index)
 161 {
 162         return devlink_port_get_by_index(devlink, port_index);
 163 }
 164
 165 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
 166                                                         struct nlattr **attrs)
 167 {
 168         if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 169                 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 170                 struct devlink_port *devlink_port;
 171
 172                 devlink_port = devlink_port_get_by_index(devlink, port_index);
 173                 if (!devlink_port)
 174                         return ERR_PTR(-ENODEV);
 175                 return devlink_port;
 176         }
 177         return ERR_PTR(-EINVAL);
 178 }
 179
 180 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
 181                                                        struct genl_info *info)
 182 {
 183         return devlink_port_get_from_attrs(devlink, info->attrs);
 184 }
 185
 186 struct devlink_sb {
 187         struct list_head list;
 188         unsigned int index;
 189         u32 size;
 190         u16 ingress_pools_count;
 191         u16 egress_pools_count;
 192         u16 ingress_tc_count;
 193         u16 egress_tc_count;
 194 };
 195
 196 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
 197 {
 198         return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
 199 }
 200
 201 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
 202                                                   unsigned int sb_index)
 203 {
 204         struct devlink_sb *devlink_sb;
 205
 206         list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 207                 if (devlink_sb->index == sb_index)
 208                         return devlink_sb;
 209         }
 210         return NULL;
 211 }
 212
 213 static bool devlink_sb_index_exists(struct devlink *devlink,
 214                                     unsigned int sb_index)
 215 {
 216         return devlink_sb_get_by_index(devlink, sb_index);
 217 }
 218
 219 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
 220                                                     struct nlattr **attrs)
 221 {
 222         if (attrs[DEVLINK_ATTR_SB_INDEX]) {
 223                 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
 224                 struct devlink_sb *devlink_sb;
 225
 226                 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
 227                 if (!devlink_sb)
 228                         return ERR_PTR(-ENODEV);
 229                 return devlink_sb;
 230         }
 231         return ERR_PTR(-EINVAL);
 232 }
 233
 234 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
 235                                                    struct genl_info *info)
 236 {
 237         return devlink_sb_get_from_attrs(devlink, info->attrs);
 238 }
 239
 240 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
 241                                                 struct nlattr **attrs,
 242                                                 u16 *p_pool_index)
 243 {
 244         u16 val;
 245
 246         if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
 247                 return -EINVAL;
 248
 249         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
 250         if (val >= devlink_sb_pool_count(devlink_sb))
 251                 return -EINVAL;
 252         *p_pool_index = val;
 253         return 0;
 254 }
 255
 256 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
 257                                                struct genl_info *info,
 258                                                u16 *p_pool_index)
 259 {
 260         return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
 261                                                     p_pool_index);
 262 }
 263
 264 static int
 265 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
 266                                     enum devlink_sb_pool_type *p_pool_type)
 267 {
 268         u8 val;
 269
 270         if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
 271                 return -EINVAL;
 272
 273         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
 274         if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
 275             val != DEVLINK_SB_POOL_TYPE_EGRESS)
 276                 return -EINVAL;
 277         *p_pool_type = val;
 278         return 0;
 279 }
 280
 281 static int
 282 devlink_sb_pool_type_get_from_info(struct genl_info *info,
 283                                    enum devlink_sb_pool_type *p_pool_type)
 284 {
 285         return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
 286 }
 287
 288 static int
 289 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
 290                                   enum devlink_sb_threshold_type *p_th_type)
 291 {
 292         u8 val;
 293
 294         if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
 295                 return -EINVAL;
 296
 297         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
 298         if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
 299             val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
 300                 return -EINVAL;
 301         *p_th_type = val;
 302         return 0;
 303 }
 304
 305 static int
 306 devlink_sb_th_type_get_from_info(struct genl_info *info,
 307                                  enum devlink_sb_threshold_type *p_th_type)
 308 {
 309         return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
 310 }
 311
 312 static int
 313 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
 314                                    struct nlattr **attrs,
 315                                    enum devlink_sb_pool_type pool_type,
 316                                    u16 *p_tc_index)
 317 {
 318         u16 val;
 319
 320         if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
 321                 return -EINVAL;
 322
 323         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
 324         if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
 325             val >= devlink_sb->ingress_tc_count)
 326                 return -EINVAL;
 327         if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
 328             val >= devlink_sb->egress_tc_count)
 329                 return -EINVAL;
 330         *p_tc_index = val;
 331         return 0;
 332 }
 333
 334 static int
 335 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
 336                                   struct genl_info *info,
 337                                   enum devlink_sb_pool_type pool_type,
 338                                   u16 *p_tc_index)
 339 {
 340         return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
 341                                                   pool_type, p_tc_index);
 342 }
 343
 344 struct devlink_region {
 345         struct devlink *devlink;
 346         struct list_head list;
 347         const struct devlink_region_ops *ops;
 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         u8 *data;
 358         u32 id;
 359 };
 360
 361 static struct devlink_region *
 362 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
 363 {
 364         struct devlink_region *region;
 365
 366         list_for_each_entry(region, &devlink->region_list, list)
 367                 if (!strcmp(region->ops->name, region_name))
 368                         return region;
 369
 370         return NULL;
 371 }
 372
 373 static struct devlink_snapshot *
 374 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
 375 {
 376         struct devlink_snapshot *snapshot;
 377
 378         list_for_each_entry(snapshot, &region->snapshot_list, list)
 379                 if (snapshot->id == id)
 380                         return snapshot;
 381
 382         return NULL;
 383 }
 384
 385 #define DEVLINK_NL_FLAG_NEED_DEVLINK    BIT(0)
 386 #define DEVLINK_NL_FLAG_NEED_PORT       BIT(1)
 387 #define DEVLINK_NL_FLAG_NEED_SB         BIT(2)
 388
 389 /* The per devlink instance lock is taken by default in the pre-doit
 390  * operation, yet several commands do not require this. The global
 391  * devlink lock is taken and protects from disruption by user-calls.
 392  */
 393 #define DEVLINK_NL_FLAG_NO_LOCK         BIT(3)
 394
 395 static int devlink_nl_pre_doit(const struct genl_ops *ops,
 396                                struct sk_buff *skb, struct genl_info *info)
 397 {
 398         struct devlink *devlink;
 399         int err;
 400
 401         mutex_lock(&devlink_mutex);
 402         devlink = devlink_get_from_info(info);
 403         if (IS_ERR(devlink)) {
 404                 mutex_unlock(&devlink_mutex);
 405                 return PTR_ERR(devlink);
 406         }
 407         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 408                 mutex_lock(&devlink->lock);
 409         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 410                 info->user_ptr[0] = devlink;
 411         } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
 412                 struct devlink_port *devlink_port;
 413
 414                 devlink_port = devlink_port_get_from_info(devlink, info);
 415                 if (IS_ERR(devlink_port)) {
 416                         err = PTR_ERR(devlink_port);
 417                         goto unlock;
 418                 }
 419                 info->user_ptr[0] = devlink_port;
 420         }
 421         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
 422                 struct devlink_sb *devlink_sb;
 423
 424                 devlink_sb = devlink_sb_get_from_info(devlink, info);
 425                 if (IS_ERR(devlink_sb)) {
 426                         err = PTR_ERR(devlink_sb);
 427                         goto unlock;
 428                 }
 429                 info->user_ptr[1] = devlink_sb;
 430         }
 431         return 0;
 432
 433 unlock:
 434         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 435                 mutex_unlock(&devlink->lock);
 436         mutex_unlock(&devlink_mutex);
 437         return err;
 438 }
 439
 440 static void devlink_nl_post_doit(const struct genl_ops *ops,
 441                                  struct sk_buff *skb, struct genl_info *info)
 442 {
 443         struct devlink *devlink;
 444
 445         /* When devlink changes netns, it would not be found
 446          * by devlink_get_from_info(). So try if it is stored first.
 447          */
 448         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 449                 devlink = info->user_ptr[0];
 450         } else {
 451                 devlink = devlink_get_from_info(info);
 452                 WARN_ON(IS_ERR(devlink));
 453         }
 454         if (!IS_ERR(devlink) && ~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 455                 mutex_unlock(&devlink->lock);
 456         mutex_unlock(&devlink_mutex);
 457 }
 458
 459 static struct genl_family devlink_nl_family;
 460
 461 enum devlink_multicast_groups {
 462         DEVLINK_MCGRP_CONFIG,
 463 };
 464
 465 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
 466         [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
 467 };
 468
 469 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 470 {
 471         if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
 472                 return -EMSGSIZE;
 473         if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
 474                 return -EMSGSIZE;
 475         return 0;
 476 }
 477
 478 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 479                            enum devlink_command cmd, u32 portid,
 480                            u32 seq, int flags)
 481 {
 482         void *hdr;
 483
 484         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 485         if (!hdr)
 486                 return -EMSGSIZE;
 487
 488         if (devlink_nl_put_handle(msg, devlink))
 489                 goto nla_put_failure;
 490         if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
 491                 goto nla_put_failure;
 492
 493         genlmsg_end(msg, hdr);
 494         return 0;
 495
 496 nla_put_failure:
 497         genlmsg_cancel(msg, hdr);
 498         return -EMSGSIZE;
 499 }
 500
 501 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 502 {
 503         struct sk_buff *msg;
 504         int err;
 505
 506         WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
 507
 508         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 509         if (!msg)
 510                 return;
 511
 512         err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
 513         if (err) {
 514                 nlmsg_free(msg);
 515                 return;
 516         }
 517
 518         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 519                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 520 }
 521
 522 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
 523                                      struct devlink_port *devlink_port)
 524 {
 525         struct devlink_port_attrs *attrs = &devlink_port->attrs;
 526
 527         if (!attrs->set)
 528                 return 0;
 529         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
 530                 return -EMSGSIZE;
 531         switch (devlink_port->attrs.flavour) {
 532         case DEVLINK_PORT_FLAVOUR_PCI_PF:
 533                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 534                                 attrs->pci_pf.pf))
 535                         return -EMSGSIZE;
 536                 break;
 537         case DEVLINK_PORT_FLAVOUR_PCI_VF:
 538                 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
 539                                 attrs->pci_vf.pf) ||
 540                     nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
 541                                 attrs->pci_vf.vf))
 542                         return -EMSGSIZE;
 543                 break;
 544         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
 545         case DEVLINK_PORT_FLAVOUR_CPU:
 546         case DEVLINK_PORT_FLAVOUR_DSA:
 547         case DEVLINK_PORT_FLAVOUR_VIRTUAL:
 548                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
 549                                 attrs->phys.port_number))
 550                         return -EMSGSIZE;
 551                 if (!attrs->split)
 552                         return 0;
 553                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
 554                                 attrs->phys.port_number))
 555                         return -EMSGSIZE;
 556                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
 557                                 attrs->phys.split_subport_number))
 558                         return -EMSGSIZE;
 559                 break;
 560         default:
 561                 break;
 562         }
 563         return 0;
 564 }
 565
 566 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 567                                 struct devlink_port *devlink_port,
 568                                 enum devlink_command cmd, u32 portid,
 569                                 u32 seq, int flags)
 570 {
 571         void *hdr;
 572
 573         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 574         if (!hdr)
 575                 return -EMSGSIZE;
 576
 577         if (devlink_nl_put_handle(msg, devlink))
 578                 goto nla_put_failure;
 579         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 580                 goto nla_put_failure;
 581
 582         spin_lock_bh(&devlink_port->type_lock);
 583         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 584                 goto nla_put_failure_type_locked;
 585         if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
 586             nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
 587                         devlink_port->desired_type))
 588                 goto nla_put_failure_type_locked;
 589         if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
 590                 struct net_device *netdev = devlink_port->type_dev;
 591
 592                 if (netdev &&
 593                     (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
 594                                  netdev->ifindex) ||
 595                      nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
 596                                     netdev->name)))
 597                         goto nla_put_failure_type_locked;
 598         }
 599         if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
 600                 struct ib_device *ibdev = devlink_port->type_dev;
 601
 602                 if (ibdev &&
 603                     nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
 604                                    ibdev->name))
 605                         goto nla_put_failure_type_locked;
 606         }
 607         spin_unlock_bh(&devlink_port->type_lock);
 608         if (devlink_nl_port_attrs_put(msg, devlink_port))
 609                 goto nla_put_failure;
 610
 611         genlmsg_end(msg, hdr);
 612         return 0;
 613
 614 nla_put_failure_type_locked:
 615         spin_unlock_bh(&devlink_port->type_lock);
 616 nla_put_failure:
 617         genlmsg_cancel(msg, hdr);
 618         return -EMSGSIZE;
 619 }
 620
 621 static void devlink_port_notify(struct devlink_port *devlink_port,
 622                                 enum devlink_command cmd)
 623 {
 624         struct devlink *devlink = devlink_port->devlink;
 625         struct sk_buff *msg;
 626         int err;
 627
 628         if (!devlink_port->registered)
 629                 return;
 630
 631         WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
 632
 633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 634         if (!msg)
 635                 return;
 636
 637         err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
 638         if (err) {
 639                 nlmsg_free(msg);
 640                 return;
 641         }
 642
 643         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 644                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 645 }
 646
 647 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
 648 {
 649         struct devlink *devlink = info->user_ptr[0];
 650         struct sk_buff *msg;
 651         int err;
 652
 653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 654         if (!msg)
 655                 return -ENOMEM;
 656
 657         err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 658                               info->snd_portid, info->snd_seq, 0);
 659         if (err) {
 660                 nlmsg_free(msg);
 661                 return err;
 662         }
 663
 664         return genlmsg_reply(msg, info);
 665 }
 666
 667 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
 668                                      struct netlink_callback *cb)
 669 {
 670         struct devlink *devlink;
 671         int start = cb->args[0];
 672         int idx = 0;
 673         int err;
 674
 675         mutex_lock(&devlink_mutex);
 676         list_for_each_entry(devlink, &devlink_list, list) {
 677                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 678                         continue;
 679                 if (idx < start) {
 680                         idx++;
 681                         continue;
 682                 }
 683                 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 684                                       NETLINK_CB(cb->skb).portid,
 685                                       cb->nlh->nlmsg_seq, NLM_F_MULTI);
 686                 if (err)
 687                         goto out;
 688                 idx++;
 689         }
 690 out:
 691         mutex_unlock(&devlink_mutex);
 692
 693         cb->args[0] = idx;
 694         return msg->len;
 695 }
 696
 697 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
 698                                         struct genl_info *info)
 699 {
 700         struct devlink_port *devlink_port = info->user_ptr[0];
 701         struct devlink *devlink = devlink_port->devlink;
 702         struct sk_buff *msg;
 703         int err;
 704
 705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 706         if (!msg)
 707                 return -ENOMEM;
 708
 709         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 710                                    DEVLINK_CMD_PORT_NEW,
 711                                    info->snd_portid, info->snd_seq, 0);
 712         if (err) {
 713                 nlmsg_free(msg);
 714                 return err;
 715         }
 716
 717         return genlmsg_reply(msg, info);
 718 }
 719
 720 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
 721                                           struct netlink_callback *cb)
 722 {
 723         struct devlink *devlink;
 724         struct devlink_port *devlink_port;
 725         int start = cb->args[0];
 726         int idx = 0;
 727         int err;
 728
 729         mutex_lock(&devlink_mutex);
 730         list_for_each_entry(devlink, &devlink_list, list) {
 731                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 732                         continue;
 733                 mutex_lock(&devlink->lock);
 734                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
 735                         if (idx < start) {
 736                                 idx++;
 737                                 continue;
 738                         }
 739                         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 740                                                    DEVLINK_CMD_NEW,
 741                                                    NETLINK_CB(cb->skb).portid,
 742                                                    cb->nlh->nlmsg_seq,
 743                                                    NLM_F_MULTI);
 744                         if (err) {
 745                                 mutex_unlock(&devlink->lock);
 746                                 goto out;
 747                         }
 748                         idx++;
 749                 }
 750                 mutex_unlock(&devlink->lock);
 751         }
 752 out:
 753         mutex_unlock(&devlink_mutex);
 754
 755         cb->args[0] = idx;
 756         return msg->len;
 757 }
 758
 759 static int devlink_port_type_set(struct devlink *devlink,
 760                                  struct devlink_port *devlink_port,
 761                                  enum devlink_port_type port_type)
 762
 763 {
 764         int err;
 765
 766         if (devlink->ops->port_type_set) {
 767                 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
 768                         return -EINVAL;
 769                 if (port_type == devlink_port->type)
 770                         return 0;
 771                 err = devlink->ops->port_type_set(devlink_port, port_type);
 772                 if (err)
 773                         return err;
 774                 devlink_port->desired_type = port_type;
 775                 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 776                 return 0;
 777         }
 778         return -EOPNOTSUPP;
 779 }
 780
 781 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 782                                         struct genl_info *info)
 783 {
 784         struct devlink_port *devlink_port = info->user_ptr[0];
 785         struct devlink *devlink = devlink_port->devlink;
 786         int err;
 787
 788         if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
 789                 enum devlink_port_type port_type;
 790
 791                 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
 792                 err = devlink_port_type_set(devlink, devlink_port, port_type);
 793                 if (err)
 794                         return err;
 795         }
 796         return 0;
 797 }
 798
 799 static int devlink_port_split(struct devlink *devlink, u32 port_index,
 800                               u32 count, struct netlink_ext_ack *extack)
 801
 802 {
 803         if (devlink->ops->port_split)
 804                 return devlink->ops->port_split(devlink, port_index, count,
 805                                                 extack);
 806         return -EOPNOTSUPP;
 807 }
 808
 809 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 810                                           struct genl_info *info)
 811 {
 812         struct devlink *devlink = info->user_ptr[0];
 813         u32 port_index;
 814         u32 count;
 815
 816         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
 817             !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 818                 return -EINVAL;
 819
 820         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 821         count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 822         return devlink_port_split(devlink, port_index, count, info->extack);
 823 }
 824
 825 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
 826                                 struct netlink_ext_ack *extack)
 827
 828 {
 829         if (devlink->ops->port_unsplit)
 830                 return devlink->ops->port_unsplit(devlink, port_index, extack);
 831         return -EOPNOTSUPP;
 832 }
 833
 834 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 835                                             struct genl_info *info)
 836 {
 837         struct devlink *devlink = info->user_ptr[0];
 838         u32 port_index;
 839
 840         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
 841                 return -EINVAL;
 842
 843         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 844         return devlink_port_unsplit(devlink, port_index, info->extack);
 845 }
 846
 847 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
 848                               struct devlink_sb *devlink_sb,
 849                               enum devlink_command cmd, u32 portid,
 850                               u32 seq, int flags)
 851 {
 852         void *hdr;
 853
 854         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 855         if (!hdr)
 856                 return -EMSGSIZE;
 857
 858         if (devlink_nl_put_handle(msg, devlink))
 859                 goto nla_put_failure;
 860         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 861                 goto nla_put_failure;
 862         if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
 863                 goto nla_put_failure;
 864         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
 865                         devlink_sb->ingress_pools_count))
 866                 goto nla_put_failure;
 867         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
 868                         devlink_sb->egress_pools_count))
 869                 goto nla_put_failure;
 870         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
 871                         devlink_sb->ingress_tc_count))
 872                 goto nla_put_failure;
 873         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
 874                         devlink_sb->egress_tc_count))
 875                 goto nla_put_failure;
 876
 877         genlmsg_end(msg, hdr);
 878         return 0;
 879
 880 nla_put_failure:
 881         genlmsg_cancel(msg, hdr);
 882         return -EMSGSIZE;
 883 }
 884
 885 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
 886                                       struct genl_info *info)
 887 {
 888         struct devlink *devlink = info->user_ptr[0];
 889         struct devlink_sb *devlink_sb = info->user_ptr[1];
 890         struct sk_buff *msg;
 891         int err;
 892
 893         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 894         if (!msg)
 895                 return -ENOMEM;
 896
 897         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 898                                  DEVLINK_CMD_SB_NEW,
 899                                  info->snd_portid, info->snd_seq, 0);
 900         if (err) {
 901                 nlmsg_free(msg);
 902                 return err;
 903         }
 904
 905         return genlmsg_reply(msg, info);
 906 }
 907
 908 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
 909                                         struct netlink_callback *cb)
 910 {
 911         struct devlink *devlink;
 912         struct devlink_sb *devlink_sb;
 913         int start = cb->args[0];
 914         int idx = 0;
 915         int err;
 916
 917         mutex_lock(&devlink_mutex);
 918         list_for_each_entry(devlink, &devlink_list, list) {
 919                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 920                         continue;
 921                 mutex_lock(&devlink->lock);
 922                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 923                         if (idx < start) {
 924                                 idx++;
 925                                 continue;
 926                         }
 927                         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 928                                                  DEVLINK_CMD_SB_NEW,
 929                                                  NETLINK_CB(cb->skb).portid,
 930                                                  cb->nlh->nlmsg_seq,
 931                                                  NLM_F_MULTI);
 932                         if (err) {
 933                                 mutex_unlock(&devlink->lock);
 934                                 goto out;
 935                         }
 936                         idx++;
 937                 }
 938                 mutex_unlock(&devlink->lock);
 939         }
 940 out:
 941         mutex_unlock(&devlink_mutex);
 942
 943         cb->args[0] = idx;
 944         return msg->len;
 945 }
 946
 947 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
 948                                    struct devlink_sb *devlink_sb,
 949                                    u16 pool_index, enum devlink_command cmd,
 950                                    u32 portid, u32 seq, int flags)
 951 {
 952         struct devlink_sb_pool_info pool_info;
 953         void *hdr;
 954         int err;
 955
 956         err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
 957                                         pool_index, &pool_info);
 958         if (err)
 959                 return err;
 960
 961         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 962         if (!hdr)
 963                 return -EMSGSIZE;
 964
 965         if (devlink_nl_put_handle(msg, devlink))
 966                 goto nla_put_failure;
 967         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 968                 goto nla_put_failure;
 969         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 970                 goto nla_put_failure;
 971         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
 972                 goto nla_put_failure;
 973         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
 974                 goto nla_put_failure;
 975         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
 976                        pool_info.threshold_type))
 977                 goto nla_put_failure;
 978         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
 979                         pool_info.cell_size))
 980                 goto nla_put_failure;
 981
 982         genlmsg_end(msg, hdr);
 983         return 0;
 984
 985 nla_put_failure:
 986         genlmsg_cancel(msg, hdr);
 987         return -EMSGSIZE;
 988 }
 989
 990 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
 991                                            struct genl_info *info)
 992 {
 993         struct devlink *devlink = info->user_ptr[0];
 994         struct devlink_sb *devlink_sb = info->user_ptr[1];
 995         struct sk_buff *msg;
 996         u16 pool_index;
 997         int err;
 998
 999         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1000                                                   &pool_index);
1001         if (err)
1002                 return err;
1003
1004         if (!devlink->ops->sb_pool_get)
1005                 return -EOPNOTSUPP;
1006
1007         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1008         if (!msg)
1009                 return -ENOMEM;
1010
1011         err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
1012                                       DEVLINK_CMD_SB_POOL_NEW,
1013                                       info->snd_portid, info->snd_seq, 0);
1014         if (err) {
1015                 nlmsg_free(msg);
1016                 return err;
1017         }
1018
1019         return genlmsg_reply(msg, info);
1020 }
1021
1022 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1023                                 struct devlink *devlink,
1024                                 struct devlink_sb *devlink_sb,
1025                                 u32 portid, u32 seq)
1026 {
1027         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1028         u16 pool_index;
1029         int err;
1030
1031         for (pool_index = 0; pool_index < pool_count; pool_index++) {
1032                 if (*p_idx < start) {
1033                         (*p_idx)++;
1034                         continue;
1035                 }
1036                 err = devlink_nl_sb_pool_fill(msg, devlink,
1037                                               devlink_sb,
1038                                               pool_index,
1039                                               DEVLINK_CMD_SB_POOL_NEW,
1040                                               portid, seq, NLM_F_MULTI);
1041                 if (err)
1042                         return err;
1043                 (*p_idx)++;
1044         }
1045         return 0;
1046 }
1047
1048 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1049                                              struct netlink_callback *cb)
1050 {
1051         struct devlink *devlink;
1052         struct devlink_sb *devlink_sb;
1053         int start = cb->args[0];
1054         int idx = 0;
1055         int err = 0;
1056
1057         mutex_lock(&devlink_mutex);
1058         list_for_each_entry(devlink, &devlink_list, list) {
1059                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1060                     !devlink->ops->sb_pool_get)
1061                         continue;
1062                 mutex_lock(&devlink->lock);
1063                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1064                         err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1065                                                    devlink_sb,
1066                                                    NETLINK_CB(cb->skb).portid,
1067                                                    cb->nlh->nlmsg_seq);
1068                         if (err && err != -EOPNOTSUPP) {
1069                                 mutex_unlock(&devlink->lock);
1070                                 goto out;
1071                         }
1072                 }
1073                 mutex_unlock(&devlink->lock);
1074         }
1075 out:
1076         mutex_unlock(&devlink_mutex);
1077
1078         if (err != -EMSGSIZE)
1079                 return err;
1080
1081         cb->args[0] = idx;
1082         return msg->len;
1083 }
1084
1085 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1086                                u16 pool_index, u32 size,
1087                                enum devlink_sb_threshold_type threshold_type,
1088                                struct netlink_ext_ack *extack)
1089
1090 {
1091         const struct devlink_ops *ops = devlink->ops;
1092
1093         if (ops->sb_pool_set)
1094                 return ops->sb_pool_set(devlink, sb_index, pool_index,
1095                                         size, threshold_type, extack);
1096         return -EOPNOTSUPP;
1097 }
1098
1099 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1100                                            struct genl_info *info)
1101 {
1102         struct devlink *devlink = info->user_ptr[0];
1103         struct devlink_sb *devlink_sb = info->user_ptr[1];
1104         enum devlink_sb_threshold_type threshold_type;
1105         u16 pool_index;
1106         u32 size;
1107         int err;
1108
1109         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1110                                                   &pool_index);
1111         if (err)
1112                 return err;
1113
1114         err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1115         if (err)
1116                 return err;
1117
1118         if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1119                 return -EINVAL;
1120
1121         size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1122         return devlink_sb_pool_set(devlink, devlink_sb->index,
1123                                    pool_index, size, threshold_type,
1124                                    info->extack);
1125 }
1126
1127 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1128                                         struct devlink *devlink,
1129                                         struct devlink_port *devlink_port,
1130                                         struct devlink_sb *devlink_sb,
1131                                         u16 pool_index,
1132                                         enum devlink_command cmd,
1133                                         u32 portid, u32 seq, int flags)
1134 {
1135         const struct devlink_ops *ops = devlink->ops;
1136         u32 threshold;
1137         void *hdr;
1138         int err;
1139
1140         err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1141                                     pool_index, &threshold);
1142         if (err)
1143                 return err;
1144
1145         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1146         if (!hdr)
1147                 return -EMSGSIZE;
1148
1149         if (devlink_nl_put_handle(msg, devlink))
1150                 goto nla_put_failure;
1151         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1152                 goto nla_put_failure;
1153         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1154                 goto nla_put_failure;
1155         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1156                 goto nla_put_failure;
1157         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1158                 goto nla_put_failure;
1159
1160         if (ops->sb_occ_port_pool_get) {
1161                 u32 cur;
1162                 u32 max;
1163
1164                 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1165                                                 pool_index, &cur, &max);
1166                 if (err && err != -EOPNOTSUPP)
1167                         return err;
1168                 if (!err) {
1169                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1170                                 goto nla_put_failure;
1171                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1172                                 goto nla_put_failure;
1173                 }
1174         }
1175
1176         genlmsg_end(msg, hdr);
1177         return 0;
1178
1179 nla_put_failure:
1180         genlmsg_cancel(msg, hdr);
1181         return -EMSGSIZE;
1182 }
1183
1184 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1185                                                 struct genl_info *info)
1186 {
1187         struct devlink_port *devlink_port = info->user_ptr[0];
1188         struct devlink *devlink = devlink_port->devlink;
1189         struct devlink_sb *devlink_sb = info->user_ptr[1];
1190         struct sk_buff *msg;
1191         u16 pool_index;
1192         int err;
1193
1194         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1195                                                   &pool_index);
1196         if (err)
1197                 return err;
1198
1199         if (!devlink->ops->sb_port_pool_get)
1200                 return -EOPNOTSUPP;
1201
1202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1203         if (!msg)
1204                 return -ENOMEM;
1205
1206         err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1207                                            devlink_sb, pool_index,
1208                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1209                                            info->snd_portid, info->snd_seq, 0);
1210         if (err) {
1211                 nlmsg_free(msg);
1212                 return err;
1213         }
1214
1215         return genlmsg_reply(msg, info);
1216 }
1217
1218 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1219                                      struct devlink *devlink,
1220                                      struct devlink_sb *devlink_sb,
1221                                      u32 portid, u32 seq)
1222 {
1223         struct devlink_port *devlink_port;
1224         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1225         u16 pool_index;
1226         int err;
1227
1228         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1229                 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1230                         if (*p_idx < start) {
1231                                 (*p_idx)++;
1232                                 continue;
1233                         }
1234                         err = devlink_nl_sb_port_pool_fill(msg, devlink,
1235                                                            devlink_port,
1236                                                            devlink_sb,
1237                                                            pool_index,
1238                                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1239                                                            portid, seq,
1240                                                            NLM_F_MULTI);
1241                         if (err)
1242                                 return err;
1243                         (*p_idx)++;
1244                 }
1245         }
1246         return 0;
1247 }
1248
1249 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1250                                                   struct netlink_callback *cb)
1251 {
1252         struct devlink *devlink;
1253         struct devlink_sb *devlink_sb;
1254         int start = cb->args[0];
1255         int idx = 0;
1256         int err = 0;
1257
1258         mutex_lock(&devlink_mutex);
1259         list_for_each_entry(devlink, &devlink_list, list) {
1260                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1261                     !devlink->ops->sb_port_pool_get)
1262                         continue;
1263                 mutex_lock(&devlink->lock);
1264                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1265                         err = __sb_port_pool_get_dumpit(msg, start, &idx,
1266                                                         devlink, devlink_sb,
1267                                                         NETLINK_CB(cb->skb).portid,
1268                                                         cb->nlh->nlmsg_seq);
1269                         if (err && err != -EOPNOTSUPP) {
1270                                 mutex_unlock(&devlink->lock);
1271                                 goto out;
1272                         }
1273                 }
1274                 mutex_unlock(&devlink->lock);
1275         }
1276 out:
1277         mutex_unlock(&devlink_mutex);
1278
1279         if (err != -EMSGSIZE)
1280                 return err;
1281
1282         cb->args[0] = idx;
1283         return msg->len;
1284 }
1285
1286 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1287                                     unsigned int sb_index, u16 pool_index,
1288                                     u32 threshold,
1289                                     struct netlink_ext_ack *extack)
1290
1291 {
1292         const struct devlink_ops *ops = devlink_port->devlink->ops;
1293
1294         if (ops->sb_port_pool_set)
1295                 return ops->sb_port_pool_set(devlink_port, sb_index,
1296                                              pool_index, threshold, extack);
1297         return -EOPNOTSUPP;
1298 }
1299
1300 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1301                                                 struct genl_info *info)
1302 {
1303         struct devlink_port *devlink_port = info->user_ptr[0];
1304         struct devlink_sb *devlink_sb = info->user_ptr[1];
1305         u16 pool_index;
1306         u32 threshold;
1307         int err;
1308
1309         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1310                                                   &pool_index);
1311         if (err)
1312                 return err;
1313
1314         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1315                 return -EINVAL;
1316
1317         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1318         return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1319                                         pool_index, threshold, info->extack);
1320 }
1321
1322 static int
1323 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1324                                 struct devlink_port *devlink_port,
1325                                 struct devlink_sb *devlink_sb, u16 tc_index,
1326                                 enum devlink_sb_pool_type pool_type,
1327                                 enum devlink_command cmd,
1328                                 u32 portid, u32 seq, int flags)
1329 {
1330         const struct devlink_ops *ops = devlink->ops;
1331         u16 pool_index;
1332         u32 threshold;
1333         void *hdr;
1334         int err;
1335
1336         err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1337                                        tc_index, pool_type,
1338                                        &pool_index, &threshold);
1339         if (err)
1340                 return err;
1341
1342         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1343         if (!hdr)
1344                 return -EMSGSIZE;
1345
1346         if (devlink_nl_put_handle(msg, devlink))
1347                 goto nla_put_failure;
1348         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1349                 goto nla_put_failure;
1350         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1351                 goto nla_put_failure;
1352         if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1353                 goto nla_put_failure;
1354         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1355                 goto nla_put_failure;
1356         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1357                 goto nla_put_failure;
1358         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1359                 goto nla_put_failure;
1360
1361         if (ops->sb_occ_tc_port_bind_get) {
1362                 u32 cur;
1363                 u32 max;
1364
1365                 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1366                                                    devlink_sb->index,
1367                                                    tc_index, pool_type,
1368                                                    &cur, &max);
1369                 if (err && err != -EOPNOTSUPP)
1370                         return err;
1371                 if (!err) {
1372                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1373                                 goto nla_put_failure;
1374                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1375                                 goto nla_put_failure;
1376                 }
1377         }
1378
1379         genlmsg_end(msg, hdr);
1380         return 0;
1381
1382 nla_put_failure:
1383         genlmsg_cancel(msg, hdr);
1384         return -EMSGSIZE;
1385 }
1386
1387 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1388                                                    struct genl_info *info)
1389 {
1390         struct devlink_port *devlink_port = info->user_ptr[0];
1391         struct devlink *devlink = devlink_port->devlink;
1392         struct devlink_sb *devlink_sb = info->user_ptr[1];
1393         struct sk_buff *msg;
1394         enum devlink_sb_pool_type pool_type;
1395         u16 tc_index;
1396         int err;
1397
1398         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1399         if (err)
1400                 return err;
1401
1402         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1403                                                 pool_type, &tc_index);
1404         if (err)
1405                 return err;
1406
1407         if (!devlink->ops->sb_tc_pool_bind_get)
1408                 return -EOPNOTSUPP;
1409
1410         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1411         if (!msg)
1412                 return -ENOMEM;
1413
1414         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1415                                               devlink_sb, tc_index, pool_type,
1416                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1417                                               info->snd_portid,
1418                                               info->snd_seq, 0);
1419         if (err) {
1420                 nlmsg_free(msg);
1421                 return err;
1422         }
1423
1424         return genlmsg_reply(msg, info);
1425 }
1426
1427 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1428                                         int start, int *p_idx,
1429                                         struct devlink *devlink,
1430                                         struct devlink_sb *devlink_sb,
1431                                         u32 portid, u32 seq)
1432 {
1433         struct devlink_port *devlink_port;
1434         u16 tc_index;
1435         int err;
1436
1437         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1438                 for (tc_index = 0;
1439                      tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1440                         if (*p_idx < start) {
1441                                 (*p_idx)++;
1442                                 continue;
1443                         }
1444                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1445                                                               devlink_port,
1446                                                               devlink_sb,
1447                                                               tc_index,
1448                                                               DEVLINK_SB_POOL_TYPE_INGRESS,
1449                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1450                                                               portid, seq,
1451                                                               NLM_F_MULTI);
1452                         if (err)
1453                                 return err;
1454                         (*p_idx)++;
1455                 }
1456                 for (tc_index = 0;
1457                      tc_index < devlink_sb->egress_tc_count; tc_index++) {
1458                         if (*p_idx < start) {
1459                                 (*p_idx)++;
1460                                 continue;
1461                         }
1462                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1463                                                               devlink_port,
1464                                                               devlink_sb,
1465                                                               tc_index,
1466                                                               DEVLINK_SB_POOL_TYPE_EGRESS,
1467                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1468                                                               portid, seq,
1469                                                               NLM_F_MULTI);
1470                         if (err)
1471                                 return err;
1472                         (*p_idx)++;
1473                 }
1474         }
1475         return 0;
1476 }
1477
1478 static int
1479 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1480                                           struct netlink_callback *cb)
1481 {
1482         struct devlink *devlink;
1483         struct devlink_sb *devlink_sb;
1484         int start = cb->args[0];
1485         int idx = 0;
1486         int err = 0;
1487
1488         mutex_lock(&devlink_mutex);
1489         list_for_each_entry(devlink, &devlink_list, list) {
1490                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1491                     !devlink->ops->sb_tc_pool_bind_get)
1492                         continue;
1493
1494                 mutex_lock(&devlink->lock);
1495                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1496                         err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1497                                                            devlink,
1498                                                            devlink_sb,
1499                                                            NETLINK_CB(cb->skb).portid,
1500                                                            cb->nlh->nlmsg_seq);
1501                         if (err && err != -EOPNOTSUPP) {
1502                                 mutex_unlock(&devlink->lock);
1503                                 goto out;
1504                         }
1505                 }
1506                 mutex_unlock(&devlink->lock);
1507         }
1508 out:
1509         mutex_unlock(&devlink_mutex);
1510
1511         if (err != -EMSGSIZE)
1512                 return err;
1513
1514         cb->args[0] = idx;
1515         return msg->len;
1516 }
1517
1518 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1519                                        unsigned int sb_index, u16 tc_index,
1520                                        enum devlink_sb_pool_type pool_type,
1521                                        u16 pool_index, u32 threshold,
1522                                        struct netlink_ext_ack *extack)
1523
1524 {
1525         const struct devlink_ops *ops = devlink_port->devlink->ops;
1526
1527         if (ops->sb_tc_pool_bind_set)
1528                 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1529                                                 tc_index, pool_type,
1530                                                 pool_index, threshold, extack);
1531         return -EOPNOTSUPP;
1532 }
1533
1534 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1535                                                    struct genl_info *info)
1536 {
1537         struct devlink_port *devlink_port = info->user_ptr[0];
1538         struct devlink_sb *devlink_sb = info->user_ptr[1];
1539         enum devlink_sb_pool_type pool_type;
1540         u16 tc_index;
1541         u16 pool_index;
1542         u32 threshold;
1543         int err;
1544
1545         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1546         if (err)
1547                 return err;
1548
1549         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1550                                                 pool_type, &tc_index);
1551         if (err)
1552                 return err;
1553
1554         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1555                                                   &pool_index);
1556         if (err)
1557                 return err;
1558
1559         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1560                 return -EINVAL;
1561
1562         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1563         return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1564                                            tc_index, pool_type,
1565                                            pool_index, threshold, info->extack);
1566 }
1567
1568 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1569                                                struct genl_info *info)
1570 {
1571         struct devlink *devlink = info->user_ptr[0];
1572         struct devlink_sb *devlink_sb = info->user_ptr[1];
1573         const struct devlink_ops *ops = devlink->ops;
1574
1575         if (ops->sb_occ_snapshot)
1576                 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1577         return -EOPNOTSUPP;
1578 }
1579
1580 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1581                                                 struct genl_info *info)
1582 {
1583         struct devlink *devlink = info->user_ptr[0];
1584         struct devlink_sb *devlink_sb = info->user_ptr[1];
1585         const struct devlink_ops *ops = devlink->ops;
1586
1587         if (ops->sb_occ_max_clear)
1588                 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1589         return -EOPNOTSUPP;
1590 }
1591
1592 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1593                                    enum devlink_command cmd, u32 portid,
1594                                    u32 seq, int flags)
1595 {
1596         const struct devlink_ops *ops = devlink->ops;
1597         enum devlink_eswitch_encap_mode encap_mode;
1598         u8 inline_mode;
1599         void *hdr;
1600         int err = 0;
1601         u16 mode;
1602
1603         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1604         if (!hdr)
1605                 return -EMSGSIZE;
1606
1607         err = devlink_nl_put_handle(msg, devlink);
1608         if (err)
1609                 goto nla_put_failure;
1610
1611         if (ops->eswitch_mode_get) {
1612                 err = ops->eswitch_mode_get(devlink, &mode);
1613                 if (err)
1614                         goto nla_put_failure;
1615                 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1616                 if (err)
1617                         goto nla_put_failure;
1618         }
1619
1620         if (ops->eswitch_inline_mode_get) {
1621                 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1622                 if (err)
1623                         goto nla_put_failure;
1624                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1625                                  inline_mode);
1626                 if (err)
1627                         goto nla_put_failure;
1628         }
1629
1630         if (ops->eswitch_encap_mode_get) {
1631                 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1632                 if (err)
1633                         goto nla_put_failure;
1634                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1635                 if (err)
1636                         goto nla_put_failure;
1637         }
1638
1639         genlmsg_end(msg, hdr);
1640         return 0;
1641
1642 nla_put_failure:
1643         genlmsg_cancel(msg, hdr);
1644         return err;
1645 }
1646
1647 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1648                                            struct genl_info *info)
1649 {
1650         struct devlink *devlink = info->user_ptr[0];
1651         struct sk_buff *msg;
1652         int err;
1653
1654         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1655         if (!msg)
1656                 return -ENOMEM;
1657
1658         err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1659                                       info->snd_portid, info->snd_seq, 0);
1660
1661         if (err) {
1662                 nlmsg_free(msg);
1663                 return err;
1664         }
1665
1666         return genlmsg_reply(msg, info);
1667 }
1668
1669 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1670                                            struct genl_info *info)
1671 {
1672         struct devlink *devlink = info->user_ptr[0];
1673         const struct devlink_ops *ops = devlink->ops;
1674         enum devlink_eswitch_encap_mode encap_mode;
1675         u8 inline_mode;
1676         int err = 0;
1677         u16 mode;
1678
1679         if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1680                 if (!ops->eswitch_mode_set)
1681                         return -EOPNOTSUPP;
1682                 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1683                 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1684                 if (err)
1685                         return err;
1686         }
1687
1688         if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1689                 if (!ops->eswitch_inline_mode_set)
1690                         return -EOPNOTSUPP;
1691                 inline_mode = nla_get_u8(
1692                                 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1693                 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1694                                                    info->extack);
1695                 if (err)
1696                         return err;
1697         }
1698
1699         if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1700                 if (!ops->eswitch_encap_mode_set)
1701                         return -EOPNOTSUPP;
1702                 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1703                 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1704                                                   info->extack);
1705                 if (err)
1706                         return err;
1707         }
1708
1709         return 0;
1710 }
1711
1712 int devlink_dpipe_match_put(struct sk_buff *skb,
1713                             struct devlink_dpipe_match *match)
1714 {
1715         struct devlink_dpipe_header *header = match->header;
1716         struct devlink_dpipe_field *field = &header->fields[match->field_id];
1717         struct nlattr *match_attr;
1718
1719         match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
1720         if (!match_attr)
1721                 return -EMSGSIZE;
1722
1723         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1724             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1725             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1726             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1727             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1728                 goto nla_put_failure;
1729
1730         nla_nest_end(skb, match_attr);
1731         return 0;
1732
1733 nla_put_failure:
1734         nla_nest_cancel(skb, match_attr);
1735         return -EMSGSIZE;
1736 }
1737 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1738
1739 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1740                                      struct sk_buff *skb)
1741 {
1742         struct nlattr *matches_attr;
1743
1744         matches_attr = nla_nest_start_noflag(skb,
1745                                              DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1746         if (!matches_attr)
1747                 return -EMSGSIZE;
1748
1749         if (table->table_ops->matches_dump(table->priv, skb))
1750                 goto nla_put_failure;
1751
1752         nla_nest_end(skb, matches_attr);
1753         return 0;
1754
1755 nla_put_failure:
1756         nla_nest_cancel(skb, matches_attr);
1757         return -EMSGSIZE;
1758 }
1759
1760 int devlink_dpipe_action_put(struct sk_buff *skb,
1761                              struct devlink_dpipe_action *action)
1762 {
1763         struct devlink_dpipe_header *header = action->header;
1764         struct devlink_dpipe_field *field = &header->fields[action->field_id];
1765         struct nlattr *action_attr;
1766
1767         action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
1768         if (!action_attr)
1769                 return -EMSGSIZE;
1770
1771         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1772             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1773             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1774             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1775             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1776                 goto nla_put_failure;
1777
1778         nla_nest_end(skb, action_attr);
1779         return 0;
1780
1781 nla_put_failure:
1782         nla_nest_cancel(skb, action_attr);
1783         return -EMSGSIZE;
1784 }
1785 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1786
1787 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1788                                      struct sk_buff *skb)
1789 {
1790         struct nlattr *actions_attr;
1791
1792         actions_attr = nla_nest_start_noflag(skb,
1793                                              DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1794         if (!actions_attr)
1795                 return -EMSGSIZE;
1796
1797         if (table->table_ops->actions_dump(table->priv, skb))
1798                 goto nla_put_failure;
1799
1800         nla_nest_end(skb, actions_attr);
1801         return 0;
1802
1803 nla_put_failure:
1804         nla_nest_cancel(skb, actions_attr);
1805         return -EMSGSIZE;
1806 }
1807
1808 static int devlink_dpipe_table_put(struct sk_buff *skb,
1809                                    struct devlink_dpipe_table *table)
1810 {
1811         struct nlattr *table_attr;
1812         u64 table_size;
1813
1814         table_size = table->table_ops->size_get(table->priv);
1815         table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
1816         if (!table_attr)
1817                 return -EMSGSIZE;
1818
1819         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1820             nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1821                               DEVLINK_ATTR_PAD))
1822                 goto nla_put_failure;
1823         if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1824                        table->counters_enabled))
1825                 goto nla_put_failure;
1826
1827         if (table->resource_valid) {
1828                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1829                                       table->resource_id, DEVLINK_ATTR_PAD) ||
1830                     nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1831                                       table->resource_units, DEVLINK_ATTR_PAD))
1832                         goto nla_put_failure;
1833         }
1834         if (devlink_dpipe_matches_put(table, skb))
1835                 goto nla_put_failure;
1836
1837         if (devlink_dpipe_actions_put(table, skb))
1838                 goto nla_put_failure;
1839
1840         nla_nest_end(skb, table_attr);
1841         return 0;
1842
1843 nla_put_failure:
1844         nla_nest_cancel(skb, table_attr);
1845         return -EMSGSIZE;
1846 }
1847
1848 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1849                                             struct genl_info *info)
1850 {
1851         int err;
1852
1853         if (*pskb) {
1854                 err = genlmsg_reply(*pskb, info);
1855                 if (err)
1856                         return err;
1857         }
1858         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1859         if (!*pskb)
1860                 return -ENOMEM;
1861         return 0;
1862 }
1863
1864 static int devlink_dpipe_tables_fill(struct genl_info *info,
1865                                      enum devlink_command cmd, int flags,
1866                                      struct list_head *dpipe_tables,
1867                                      const char *table_name)
1868 {
1869         struct devlink *devlink = info->user_ptr[0];
1870         struct devlink_dpipe_table *table;
1871         struct nlattr *tables_attr;
1872         struct sk_buff *skb = NULL;
1873         struct nlmsghdr *nlh;
1874         bool incomplete;
1875         void *hdr;
1876         int i;
1877         int err;
1878
1879         table = list_first_entry(dpipe_tables,
1880                                  struct devlink_dpipe_table, list);
1881 start_again:
1882         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1883         if (err)
1884                 return err;
1885
1886         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1887                           &devlink_nl_family, NLM_F_MULTI, cmd);
1888         if (!hdr) {
1889                 nlmsg_free(skb);
1890                 return -EMSGSIZE;
1891         }
1892
1893         if (devlink_nl_put_handle(skb, devlink))
1894                 goto nla_put_failure;
1895         tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
1896         if (!tables_attr)
1897                 goto nla_put_failure;
1898
1899         i = 0;
1900         incomplete = false;
1901         list_for_each_entry_from(table, dpipe_tables, list) {
1902                 if (!table_name) {
1903                         err = devlink_dpipe_table_put(skb, table);
1904                         if (err) {
1905                                 if (!i)
1906                                         goto err_table_put;
1907                                 incomplete = true;
1908                                 break;
1909                         }
1910                 } else {
1911                         if (!strcmp(table->name, table_name)) {
1912                                 err = devlink_dpipe_table_put(skb, table);
1913                                 if (err)
1914                                         break;
1915                         }
1916                 }
1917                 i++;
1918         }
1919
1920         nla_nest_end(skb, tables_attr);
1921         genlmsg_end(skb, hdr);
1922         if (incomplete)
1923                 goto start_again;
1924
1925 send_done:
1926         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1927                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
1928         if (!nlh) {
1929                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1930                 if (err)
1931                         return err;
1932                 goto send_done;
1933         }
1934
1935         return genlmsg_reply(skb, info);
1936
1937 nla_put_failure:
1938         err = -EMSGSIZE;
1939 err_table_put:
1940         nlmsg_free(skb);
1941         return err;
1942 }
1943
1944 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1945                                           struct genl_info *info)
1946 {
1947         struct devlink *devlink = info->user_ptr[0];
1948         const char *table_name =  NULL;
1949
1950         if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1951                 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1952
1953         return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1954                                          &devlink->dpipe_table_list,
1955                                          table_name);
1956 }
1957
1958 static int devlink_dpipe_value_put(struct sk_buff *skb,
1959                                    struct devlink_dpipe_value *value)
1960 {
1961         if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1962                     value->value_size, value->value))
1963                 return -EMSGSIZE;
1964         if (value->mask)
1965                 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1966                             value->value_size, value->mask))
1967                         return -EMSGSIZE;
1968         if (value->mapping_valid)
1969                 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1970                                 value->mapping_value))
1971                         return -EMSGSIZE;
1972         return 0;
1973 }
1974
1975 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1976                                           struct devlink_dpipe_value *value)
1977 {
1978         if (!value->action)
1979                 return -EINVAL;
1980         if (devlink_dpipe_action_put(skb, value->action))
1981                 return -EMSGSIZE;
1982         if (devlink_dpipe_value_put(skb, value))
1983                 return -EMSGSIZE;
1984         return 0;
1985 }
1986
1987 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1988                                            struct devlink_dpipe_value *values,
1989                                            unsigned int values_count)
1990 {
1991         struct nlattr *action_attr;
1992         int i;
1993         int err;
1994
1995         for (i = 0; i < values_count; i++) {
1996                 action_attr = nla_nest_start_noflag(skb,
1997                                                     DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1998                 if (!action_attr)
1999                         return -EMSGSIZE;
2000                 err = devlink_dpipe_action_value_put(skb, &values[i]);
2001                 if (err)
2002                         goto err_action_value_put;
2003                 nla_nest_end(skb, action_attr);
2004         }
2005         return 0;
2006
2007 err_action_value_put:
2008         nla_nest_cancel(skb, action_attr);
2009         return err;
2010 }
2011
2012 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
2013                                          struct devlink_dpipe_value *value)
2014 {
2015         if (!value->match)
2016                 return -EINVAL;
2017         if (devlink_dpipe_match_put(skb, value->match))
2018                 return -EMSGSIZE;
2019         if (devlink_dpipe_value_put(skb, value))
2020                 return -EMSGSIZE;
2021         return 0;
2022 }
2023
2024 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
2025                                           struct devlink_dpipe_value *values,
2026                                           unsigned int values_count)
2027 {
2028         struct nlattr *match_attr;
2029         int i;
2030         int err;
2031
2032         for (i = 0; i < values_count; i++) {
2033                 match_attr = nla_nest_start_noflag(skb,
2034                                                    DEVLINK_ATTR_DPIPE_MATCH_VALUE);
2035                 if (!match_attr)
2036                         return -EMSGSIZE;
2037                 err = devlink_dpipe_match_value_put(skb, &values[i]);
2038                 if (err)
2039                         goto err_match_value_put;
2040                 nla_nest_end(skb, match_attr);
2041         }
2042         return 0;
2043
2044 err_match_value_put:
2045         nla_nest_cancel(skb, match_attr);
2046         return err;
2047 }
2048
2049 static int devlink_dpipe_entry_put(struct sk_buff *skb,
2050                                    struct devlink_dpipe_entry *entry)
2051 {
2052         struct nlattr *entry_attr, *matches_attr, *actions_attr;
2053         int err;
2054
2055         entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2056         if (!entry_attr)
2057                 return  -EMSGSIZE;
2058
2059         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2060                               DEVLINK_ATTR_PAD))
2061                 goto nla_put_failure;
2062         if (entry->counter_valid)
2063                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2064                                       entry->counter, DEVLINK_ATTR_PAD))
2065                         goto nla_put_failure;
2066
2067         matches_attr = nla_nest_start_noflag(skb,
2068                                              DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2069         if (!matches_attr)
2070                 goto nla_put_failure;
2071
2072         err = devlink_dpipe_match_values_put(skb, entry->match_values,
2073                                              entry->match_values_count);
2074         if (err) {
2075                 nla_nest_cancel(skb, matches_attr);
2076                 goto err_match_values_put;
2077         }
2078         nla_nest_end(skb, matches_attr);
2079
2080         actions_attr = nla_nest_start_noflag(skb,
2081                                              DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2082         if (!actions_attr)
2083                 goto nla_put_failure;
2084
2085         err = devlink_dpipe_action_values_put(skb, entry->action_values,
2086                                               entry->action_values_count);
2087         if (err) {
2088                 nla_nest_cancel(skb, actions_attr);
2089                 goto err_action_values_put;
2090         }
2091         nla_nest_end(skb, actions_attr);
2092
2093         nla_nest_end(skb, entry_attr);
2094         return 0;
2095
2096 nla_put_failure:
2097         err = -EMSGSIZE;
2098 err_match_values_put:
2099 err_action_values_put:
2100         nla_nest_cancel(skb, entry_attr);
2101         return err;
2102 }
2103
2104 static struct devlink_dpipe_table *
2105 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2106                          const char *table_name, struct devlink *devlink)
2107 {
2108         struct devlink_dpipe_table *table;
2109         list_for_each_entry_rcu(table, dpipe_tables, list,
2110                                 lockdep_is_held(&devlink->lock)) {
2111                 if (!strcmp(table->name, table_name))
2112                         return table;
2113         }
2114         return NULL;
2115 }
2116
2117 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2118 {
2119         struct devlink *devlink;
2120         int err;
2121
2122         err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2123                                                dump_ctx->info);
2124         if (err)
2125                 return err;
2126
2127         dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2128                                     dump_ctx->info->snd_portid,
2129                                     dump_ctx->info->snd_seq,
2130                                     &devlink_nl_family, NLM_F_MULTI,
2131                                     dump_ctx->cmd);
2132         if (!dump_ctx->hdr)
2133                 goto nla_put_failure;
2134
2135         devlink = dump_ctx->info->user_ptr[0];
2136         if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2137                 goto nla_put_failure;
2138         dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2139                                                DEVLINK_ATTR_DPIPE_ENTRIES);
2140         if (!dump_ctx->nest)
2141                 goto nla_put_failure;
2142         return 0;
2143
2144 nla_put_failure:
2145         nlmsg_free(dump_ctx->skb);
2146         return -EMSGSIZE;
2147 }
2148 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2149
2150 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2151                                    struct devlink_dpipe_entry *entry)
2152 {
2153         return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2154 }
2155 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2156
2157 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2158 {
2159         nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2160         genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2161         return 0;
2162 }
2163 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2164
2165 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2166
2167 {
2168         unsigned int value_count, value_index;
2169         struct devlink_dpipe_value *value;
2170
2171         value = entry->action_values;
2172         value_count = entry->action_values_count;
2173         for (value_index = 0; value_index < value_count; value_index++) {
2174                 kfree(value[value_index].value);
2175                 kfree(value[value_index].mask);
2176         }
2177
2178         value = entry->match_values;
2179         value_count = entry->match_values_count;
2180         for (value_index = 0; value_index < value_count; value_index++) {
2181                 kfree(value[value_index].value);
2182                 kfree(value[value_index].mask);
2183         }
2184 }
2185 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2186
2187 static int devlink_dpipe_entries_fill(struct genl_info *info,
2188                                       enum devlink_command cmd, int flags,
2189                                       struct devlink_dpipe_table *table)
2190 {
2191         struct devlink_dpipe_dump_ctx dump_ctx;
2192         struct nlmsghdr *nlh;
2193         int err;
2194
2195         dump_ctx.skb = NULL;
2196         dump_ctx.cmd = cmd;
2197         dump_ctx.info = info;
2198
2199         err = table->table_ops->entries_dump(table->priv,
2200                                              table->counters_enabled,
2201                                              &dump_ctx);
2202         if (err)
2203                 return err;
2204
2205 send_done:
2206         nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2207                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2208         if (!nlh) {
2209                 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2210                 if (err)
2211                         return err;
2212                 goto send_done;
2213         }
2214         return genlmsg_reply(dump_ctx.skb, info);
2215 }
2216
2217 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2218                                             struct genl_info *info)
2219 {
2220         struct devlink *devlink = info->user_ptr[0];
2221         struct devlink_dpipe_table *table;
2222         const char *table_name;
2223
2224         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2225                 return -EINVAL;
2226
2227         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2228         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2229                                          table_name, devlink);
2230         if (!table)
2231                 return -EINVAL;
2232
2233         if (!table->table_ops->entries_dump)
2234                 return -EINVAL;
2235
2236         return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2237                                           0, table);
2238 }
2239
2240 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2241                                     const struct devlink_dpipe_header *header)
2242 {
2243         struct devlink_dpipe_field *field;
2244         struct nlattr *field_attr;
2245         int i;
2246
2247         for (i = 0; i < header->fields_count; i++) {
2248                 field = &header->fields[i];
2249                 field_attr = nla_nest_start_noflag(skb,
2250                                                    DEVLINK_ATTR_DPIPE_FIELD);
2251                 if (!field_attr)
2252                         return -EMSGSIZE;
2253                 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2254                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2255                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2256                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2257                         goto nla_put_failure;
2258                 nla_nest_end(skb, field_attr);
2259         }
2260         return 0;
2261
2262 nla_put_failure:
2263         nla_nest_cancel(skb, field_attr);
2264         return -EMSGSIZE;
2265 }
2266
2267 static int devlink_dpipe_header_put(struct sk_buff *skb,
2268                                     struct devlink_dpipe_header *header)
2269 {
2270         struct nlattr *fields_attr, *header_attr;
2271         int err;
2272
2273         header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2274         if (!header_attr)
2275                 return -EMSGSIZE;
2276
2277         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2278             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2279             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2280                 goto nla_put_failure;
2281
2282         fields_attr = nla_nest_start_noflag(skb,
2283                                             DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2284         if (!fields_attr)
2285                 goto nla_put_failure;
2286
2287         err = devlink_dpipe_fields_put(skb, header);
2288         if (err) {
2289                 nla_nest_cancel(skb, fields_attr);
2290                 goto nla_put_failure;
2291         }
2292         nla_nest_end(skb, fields_attr);
2293         nla_nest_end(skb, header_attr);
2294         return 0;
2295
2296 nla_put_failure:
2297         err = -EMSGSIZE;
2298         nla_nest_cancel(skb, header_attr);
2299         return err;
2300 }
2301
2302 static int devlink_dpipe_headers_fill(struct genl_info *info,
2303                                       enum devlink_command cmd, int flags,
2304                                       struct devlink_dpipe_headers *
2305                                       dpipe_headers)
2306 {
2307         struct devlink *devlink = info->user_ptr[0];
2308         struct nlattr *headers_attr;
2309         struct sk_buff *skb = NULL;
2310         struct nlmsghdr *nlh;
2311         void *hdr;
2312         int i, j;
2313         int err;
2314
2315         i = 0;
2316 start_again:
2317         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2318         if (err)
2319                 return err;
2320
2321         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2322                           &devlink_nl_family, NLM_F_MULTI, cmd);
2323         if (!hdr) {
2324                 nlmsg_free(skb);
2325                 return -EMSGSIZE;
2326         }
2327
2328         if (devlink_nl_put_handle(skb, devlink))
2329                 goto nla_put_failure;
2330         headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2331         if (!headers_attr)
2332                 goto nla_put_failure;
2333
2334         j = 0;
2335         for (; i < dpipe_headers->headers_count; i++) {
2336                 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2337                 if (err) {
2338                         if (!j)
2339                                 goto err_table_put;
2340                         break;
2341                 }
2342                 j++;
2343         }
2344         nla_nest_end(skb, headers_attr);
2345         genlmsg_end(skb, hdr);
2346         if (i != dpipe_headers->headers_count)
2347                 goto start_again;
2348
2349 send_done:
2350         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2351                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2352         if (!nlh) {
2353                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2354                 if (err)
2355                         return err;
2356                 goto send_done;
2357         }
2358         return genlmsg_reply(skb, info);
2359
2360 nla_put_failure:
2361         err = -EMSGSIZE;
2362 err_table_put:
2363         nlmsg_free(skb);
2364         return err;
2365 }
2366
2367 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2368                                             struct genl_info *info)
2369 {
2370         struct devlink *devlink = info->user_ptr[0];
2371
2372         if (!devlink->dpipe_headers)
2373                 return -EOPNOTSUPP;
2374         return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2375                                           0, devlink->dpipe_headers);
2376 }
2377
2378 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2379                                             const char *table_name,
2380                                             bool enable)
2381 {
2382         struct devlink_dpipe_table *table;
2383
2384         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2385                                          table_name, devlink);
2386         if (!table)
2387                 return -EINVAL;
2388
2389         if (table->counter_control_extern)
2390                 return -EOPNOTSUPP;
2391
2392         if (!(table->counters_enabled ^ enable))
2393                 return 0;
2394
2395         table->counters_enabled = enable;
2396         if (table->table_ops->counters_set_update)
2397                 table->table_ops->counters_set_update(table->priv, enable);
2398         return 0;
2399 }
2400
2401 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2402                                                    struct genl_info *info)
2403 {
2404         struct devlink *devlink = info->user_ptr[0];
2405         const char *table_name;
2406         bool counters_enable;
2407
2408         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2409             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2410                 return -EINVAL;
2411
2412         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2413         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2414
2415         return devlink_dpipe_table_counters_set(devlink, table_name,
2416                                                 counters_enable);
2417 }
2418
2419 static struct devlink_resource *
2420 devlink_resource_find(struct devlink *devlink,
2421                       struct devlink_resource *resource, u64 resource_id)
2422 {
2423         struct list_head *resource_list;
2424
2425         if (resource)
2426                 resource_list = &resource->resource_list;
2427         else
2428                 resource_list = &devlink->resource_list;
2429
2430         list_for_each_entry(resource, resource_list, list) {
2431                 struct devlink_resource *child_resource;
2432
2433                 if (resource->id == resource_id)
2434                         return resource;
2435
2436                 child_resource = devlink_resource_find(devlink, resource,
2437                                                        resource_id);
2438                 if (child_resource)
2439                         return child_resource;
2440         }
2441         return NULL;
2442 }
2443
2444 static void
2445 devlink_resource_validate_children(struct devlink_resource *resource)
2446 {
2447         struct devlink_resource *child_resource;
2448         bool size_valid = true;
2449         u64 parts_size = 0;
2450
2451         if (list_empty(&resource->resource_list))
2452                 goto out;
2453
2454         list_for_each_entry(child_resource, &resource->resource_list, list)
2455                 parts_size += child_resource->size_new;
2456
2457         if (parts_size > resource->size_new)
2458                 size_valid = false;
2459 out:
2460         resource->size_valid = size_valid;
2461 }
2462
2463 static int
2464 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2465                                struct netlink_ext_ack *extack)
2466 {
2467         u64 reminder;
2468         int err = 0;
2469
2470         if (size > resource->size_params.size_max) {
2471                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2472                 err = -EINVAL;
2473         }
2474
2475         if (size < resource->size_params.size_min) {
2476                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2477                 err = -EINVAL;
2478         }
2479
2480         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2481         if (reminder) {
2482                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2483                 err = -EINVAL;
2484         }
2485
2486         return err;
2487 }
2488
2489 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2490                                        struct genl_info *info)
2491 {
2492         struct devlink *devlink = info->user_ptr[0];
2493         struct devlink_resource *resource;
2494         u64 resource_id;
2495         u64 size;
2496         int err;
2497
2498         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2499             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2500                 return -EINVAL;
2501         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2502
2503         resource = devlink_resource_find(devlink, NULL, resource_id);
2504         if (!resource)
2505                 return -EINVAL;
2506
2507         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2508         err = devlink_resource_validate_size(resource, size, info->extack);
2509         if (err)
2510                 return err;
2511
2512         resource->size_new = size;
2513         devlink_resource_validate_children(resource);
2514         if (resource->parent)
2515                 devlink_resource_validate_children(resource->parent);
2516         return 0;
2517 }
2518
2519 static int
2520 devlink_resource_size_params_put(struct devlink_resource *resource,
2521                                  struct sk_buff *skb)
2522 {
2523         struct devlink_resource_size_params *size_params;
2524
2525         size_params = &resource->size_params;
2526         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2527                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2528             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2529                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2530             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2531                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2532             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2533                 return -EMSGSIZE;
2534         return 0;
2535 }
2536
2537 static int devlink_resource_occ_put(struct devlink_resource *resource,
2538                                     struct sk_buff *skb)
2539 {
2540         if (!resource->occ_get)
2541                 return 0;
2542         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2543                                  resource->occ_get(resource->occ_get_priv),
2544                                  DEVLINK_ATTR_PAD);
2545 }
2546
2547 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2548                                 struct devlink_resource *resource)
2549 {
2550         struct devlink_resource *child_resource;
2551         struct nlattr *child_resource_attr;
2552         struct nlattr *resource_attr;
2553
2554         resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2555         if (!resource_attr)
2556                 return -EMSGSIZE;
2557
2558         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2559             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2560                               DEVLINK_ATTR_PAD) ||
2561             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2562                               DEVLINK_ATTR_PAD))
2563                 goto nla_put_failure;
2564         if (resource->size != resource->size_new)
2565                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2566                                   resource->size_new, DEVLINK_ATTR_PAD);
2567         if (devlink_resource_occ_put(resource, skb))
2568                 goto nla_put_failure;
2569         if (devlink_resource_size_params_put(resource, skb))
2570                 goto nla_put_failure;
2571         if (list_empty(&resource->resource_list))
2572                 goto out;
2573
2574         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2575                        resource->size_valid))
2576                 goto nla_put_failure;
2577
2578         child_resource_attr = nla_nest_start_noflag(skb,
2579                                                     DEVLINK_ATTR_RESOURCE_LIST);
2580         if (!child_resource_attr)
2581                 goto nla_put_failure;
2582
2583         list_for_each_entry(child_resource, &resource->resource_list, list) {
2584                 if (devlink_resource_put(devlink, skb, child_resource))
2585                         goto resource_put_failure;
2586         }
2587
2588         nla_nest_end(skb, child_resource_attr);
2589 out:
2590         nla_nest_end(skb, resource_attr);
2591         return 0;
2592
2593 resource_put_failure:
2594         nla_nest_cancel(skb, child_resource_attr);
2595 nla_put_failure:
2596         nla_nest_cancel(skb, resource_attr);
2597         return -EMSGSIZE;
2598 }
2599
2600 static int devlink_resource_fill(struct genl_info *info,
2601                                  enum devlink_command cmd, int flags)
2602 {
2603         struct devlink *devlink = info->user_ptr[0];
2604         struct devlink_resource *resource;
2605         struct nlattr *resources_attr;
2606         struct sk_buff *skb = NULL;
2607         struct nlmsghdr *nlh;
2608         bool incomplete;
2609         void *hdr;
2610         int i;
2611         int err;
2612
2613         resource = list_first_entry(&devlink->resource_list,
2614                                     struct devlink_resource, list);
2615 start_again:
2616         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2617         if (err)
2618                 return err;
2619
2620         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2621                           &devlink_nl_family, NLM_F_MULTI, cmd);
2622         if (!hdr) {
2623                 nlmsg_free(skb);
2624                 return -EMSGSIZE;
2625         }
2626
2627         if (devlink_nl_put_handle(skb, devlink))
2628                 goto nla_put_failure;
2629
2630         resources_attr = nla_nest_start_noflag(skb,
2631                                                DEVLINK_ATTR_RESOURCE_LIST);
2632         if (!resources_attr)
2633                 goto nla_put_failure;
2634
2635         incomplete = false;
2636         i = 0;
2637         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2638                 err = devlink_resource_put(devlink, skb, resource);
2639                 if (err) {
2640                         if (!i)
2641                                 goto err_resource_put;
2642                         incomplete = true;
2643                         break;
2644                 }
2645                 i++;
2646         }
2647         nla_nest_end(skb, resources_attr);
2648         genlmsg_end(skb, hdr);
2649         if (incomplete)
2650                 goto start_again;
2651 send_done:
2652         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2653                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2654         if (!nlh) {
2655                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656                 if (err)
2657                         return err;
2658                 goto send_done;
2659         }
2660         return genlmsg_reply(skb, info);
2661
2662 nla_put_failure:
2663         err = -EMSGSIZE;
2664 err_resource_put:
2665         nlmsg_free(skb);
2666         return err;
2667 }
2668
2669 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2670                                         struct genl_info *info)
2671 {
2672         struct devlink *devlink = info->user_ptr[0];
2673
2674         if (list_empty(&devlink->resource_list))
2675                 return -EOPNOTSUPP;
2676
2677         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2678 }
2679
2680 static int
2681 devlink_resources_validate(struct devlink *devlink,
2682                            struct devlink_resource *resource,
2683                            struct genl_info *info)
2684 {
2685         struct list_head *resource_list;
2686         int err = 0;
2687
2688         if (resource)
2689                 resource_list = &resource->resource_list;
2690         else
2691                 resource_list = &devlink->resource_list;
2692
2693         list_for_each_entry(resource, resource_list, list) {
2694                 if (!resource->size_valid)
2695                         return -EINVAL;
2696                 err = devlink_resources_validate(devlink, resource, info);
2697                 if (err)
2698                         return err;
2699         }
2700         return err;
2701 }
2702
2703 static struct net *devlink_netns_get(struct sk_buff *skb,
2704                                      struct genl_info *info)
2705 {
2706         struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
2707         struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
2708         struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
2709         struct net *net;
2710
2711         if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
2712                 NL_SET_ERR_MSG_MOD(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_MOD(info->extack, "Unknown network namespace");
2731                 return ERR_PTR(-EINVAL);
2732         }
2733         if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
2734                 put_net(net);
2735                 return ERR_PTR(-EPERM);
2736         }
2737         return net;
2738 }
2739
2740 static void devlink_param_notify(struct devlink *devlink,
2741                                  unsigned int port_index,
2742                                  struct devlink_param_item *param_item,
2743                                  enum devlink_command cmd);
2744
2745 static void devlink_reload_netns_change(struct devlink *devlink,
2746                                         struct net *dest_net)
2747 {
2748         struct devlink_param_item *param_item;
2749
2750         /* Userspace needs to be notified about devlink objects
2751          * removed from original and entering new network namespace.
2752          * The rest of the devlink objects are re-created during
2753          * reload process so the notifications are generated separatelly.
2754          */
2755
2756         list_for_each_entry(param_item, &devlink->param_list, list)
2757                 devlink_param_notify(devlink, 0, param_item,
2758                                      DEVLINK_CMD_PARAM_DEL);
2759         devlink_notify(devlink, DEVLINK_CMD_DEL);
2760
2761         __devlink_net_set(devlink, dest_net);
2762
2763         devlink_notify(devlink, DEVLINK_CMD_NEW);
2764         list_for_each_entry(param_item, &devlink->param_list, list)
2765                 devlink_param_notify(devlink, 0, param_item,
2766                                      DEVLINK_CMD_PARAM_NEW);
2767 }
2768
2769 static bool devlink_reload_supported(struct devlink *devlink)
2770 {
2771         return devlink->ops->reload_down && devlink->ops->reload_up;
2772 }
2773
2774 static void devlink_reload_failed_set(struct devlink *devlink,
2775                                       bool reload_failed)
2776 {
2777         if (devlink->reload_failed == reload_failed)
2778                 return;
2779         devlink->reload_failed = reload_failed;
2780         devlink_notify(devlink, DEVLINK_CMD_NEW);
2781 }
2782
2783 bool devlink_is_reload_failed(const struct devlink *devlink)
2784 {
2785         return devlink->reload_failed;
2786 }
2787 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
2788
2789 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
2790                           struct netlink_ext_ack *extack)
2791 {
2792         int err;
2793
2794         if (!devlink->reload_enabled)
2795                 return -EOPNOTSUPP;
2796
2797         err = devlink->ops->reload_down(devlink, !!dest_net, extack);
2798         if (err)
2799                 return err;
2800
2801         if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
2802                 devlink_reload_netns_change(devlink, dest_net);
2803
2804         err = devlink->ops->reload_up(devlink, extack);
2805         devlink_reload_failed_set(devlink, !!err);
2806         return err;
2807 }
2808
2809 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2810 {
2811         struct devlink *devlink = info->user_ptr[0];
2812         struct net *dest_net = NULL;
2813         int err;
2814
2815         if (!devlink_reload_supported(devlink) || !devlink->reload_enabled)
2816                 return -EOPNOTSUPP;
2817
2818         err = devlink_resources_validate(devlink, NULL, info);
2819         if (err) {
2820                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2821                 return err;
2822         }
2823
2824         if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
2825             info->attrs[DEVLINK_ATTR_NETNS_FD] ||
2826             info->attrs[DEVLINK_ATTR_NETNS_ID]) {
2827                 dest_net = devlink_netns_get(skb, info);
2828                 if (IS_ERR(dest_net))
2829                         return PTR_ERR(dest_net);
2830         }
2831
2832         err = devlink_reload(devlink, dest_net, info->extack);
2833
2834         if (dest_net)
2835                 put_net(dest_net);
2836
2837         return err;
2838 }
2839
2840 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
2841                                         struct devlink *devlink,
2842                                         enum devlink_command cmd,
2843                                         const char *status_msg,
2844                                         const char *component,
2845                                         unsigned long done, unsigned long total)
2846 {
2847         void *hdr;
2848
2849         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
2850         if (!hdr)
2851                 return -EMSGSIZE;
2852
2853         if (devlink_nl_put_handle(msg, devlink))
2854                 goto nla_put_failure;
2855
2856         if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
2857                 goto out;
2858
2859         if (status_msg &&
2860             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
2861                            status_msg))
2862                 goto nla_put_failure;
2863         if (component &&
2864             nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
2865                            component))
2866                 goto nla_put_failure;
2867         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
2868                               done, DEVLINK_ATTR_PAD))
2869                 goto nla_put_failure;
2870         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
2871                               total, DEVLINK_ATTR_PAD))
2872                 goto nla_put_failure;
2873
2874 out:
2875         genlmsg_end(msg, hdr);
2876         return 0;
2877
2878 nla_put_failure:
2879         genlmsg_cancel(msg, hdr);
2880         return -EMSGSIZE;
2881 }
2882
2883 static void __devlink_flash_update_notify(struct devlink *devlink,
2884                                           enum devlink_command cmd,
2885                                           const char *status_msg,
2886                                           const char *component,
2887                                           unsigned long done,
2888                                           unsigned long total)
2889 {
2890         struct sk_buff *msg;
2891         int err;
2892
2893         WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
2894                 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
2895                 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
2896
2897         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2898         if (!msg)
2899                 return;
2900
2901         err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
2902                                            component, done, total);
2903         if (err)
2904                 goto out_free_msg;
2905
2906         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2907                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2908         return;
2909
2910 out_free_msg:
2911         nlmsg_free(msg);
2912 }
2913
2914 void devlink_flash_update_begin_notify(struct devlink *devlink)
2915 {
2916         __devlink_flash_update_notify(devlink,
2917                                       DEVLINK_CMD_FLASH_UPDATE,
2918                                       NULL, NULL, 0, 0);
2919 }
2920 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
2921
2922 void devlink_flash_update_end_notify(struct devlink *devlink)
2923 {
2924         __devlink_flash_update_notify(devlink,
2925                                       DEVLINK_CMD_FLASH_UPDATE_END,
2926                                       NULL, NULL, 0, 0);
2927 }
2928 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
2929
2930 void devlink_flash_update_status_notify(struct devlink *devlink,
2931                                         const char *status_msg,
2932                                         const char *component,
2933                                         unsigned long done,
2934                                         unsigned long total)
2935 {
2936         __devlink_flash_update_notify(devlink,
2937                                       DEVLINK_CMD_FLASH_UPDATE_STATUS,
2938                                       status_msg, component, done, total);
2939 }
2940 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
2941
2942 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
2943                                        struct genl_info *info)
2944 {
2945         struct devlink *devlink = info->user_ptr[0];
2946         const char *file_name, *component;
2947         struct nlattr *nla_component;
2948
2949         if (!devlink->ops->flash_update)
2950                 return -EOPNOTSUPP;
2951
2952         if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
2953                 return -EINVAL;
2954         file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
2955
2956         nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
2957         component = nla_component ? nla_data(nla_component) : NULL;
2958
2959         return devlink->ops->flash_update(devlink, file_name, component,
2960                                           info->extack);
2961 }
2962
2963 static const struct devlink_param devlink_param_generic[] = {
2964         {
2965                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2966                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2967                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2968         },
2969         {
2970                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2971                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2972                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2973         },
2974         {
2975                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2976                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2977                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2978         },
2979         {
2980                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2981                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2982                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2983         },
2984         {
2985                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2986                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2987                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2988         },
2989         {
2990                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2991                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2992                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2993         },
2994         {
2995                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2996                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2997                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2998         },
2999         {
3000                 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
3001                 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
3002                 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3003         },
3004         {
3005                 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3006                 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3007                 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3008         },
3009         {
3010                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
3011                 .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
3012                 .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
3013         },
3014 };
3015
3016 static int devlink_param_generic_verify(const struct devlink_param *param)
3017 {
3018         /* verify it match generic parameter by id and name */
3019         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3020                 return -EINVAL;
3021         if (strcmp(param->name, devlink_param_generic[param->id].name))
3022                 return -ENOENT;
3023
3024         WARN_ON(param->type != devlink_param_generic[param->id].type);
3025
3026         return 0;
3027 }
3028
3029 static int devlink_param_driver_verify(const struct devlink_param *param)
3030 {
3031         int i;
3032
3033         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3034                 return -EINVAL;
3035         /* verify no such name in generic params */
3036         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3037                 if (!strcmp(param->name, devlink_param_generic[i].name))
3038                         return -EEXIST;
3039
3040         return 0;
3041 }
3042
3043 static struct devlink_param_item *
3044 devlink_param_find_by_name(struct list_head *param_list,
3045                            const char *param_name)
3046 {
3047         struct devlink_param_item *param_item;
3048
3049         list_for_each_entry(param_item, param_list, list)
3050                 if (!strcmp(param_item->param->name, param_name))
3051                         return param_item;
3052         return NULL;
3053 }
3054
3055 static struct devlink_param_item *
3056 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3057 {
3058         struct devlink_param_item *param_item;
3059
3060         list_for_each_entry(param_item, param_list, list)
3061                 if (param_item->param->id == param_id)
3062                         return param_item;
3063         return NULL;
3064 }
3065
3066 static bool
3067 devlink_param_cmode_is_supported(const struct devlink_param *param,
3068                                  enum devlink_param_cmode cmode)
3069 {
3070         return test_bit(cmode, &param->supported_cmodes);
3071 }
3072
3073 static int devlink_param_get(struct devlink *devlink,
3074                              const struct devlink_param *param,
3075                              struct devlink_param_gset_ctx *ctx)
3076 {
3077         if (!param->get)
3078                 return -EOPNOTSUPP;
3079         return param->get(devlink, param->id, ctx);
3080 }
3081
3082 static int devlink_param_set(struct devlink *devlink,
3083                              const struct devlink_param *param,
3084                              struct devlink_param_gset_ctx *ctx)
3085 {
3086         if (!param->set)
3087                 return -EOPNOTSUPP;
3088         return param->set(devlink, param->id, ctx);
3089 }
3090
3091 static int
3092 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3093 {
3094         switch (param_type) {
3095         case DEVLINK_PARAM_TYPE_U8:
3096                 return NLA_U8;
3097         case DEVLINK_PARAM_TYPE_U16:
3098                 return NLA_U16;
3099         case DEVLINK_PARAM_TYPE_U32:
3100                 return NLA_U32;
3101         case DEVLINK_PARAM_TYPE_STRING:
3102                 return NLA_STRING;
3103         case DEVLINK_PARAM_TYPE_BOOL:
3104                 return NLA_FLAG;
3105         default:
3106                 return -EINVAL;
3107         }
3108 }
3109
3110 static int
3111 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3112                                 enum devlink_param_type type,
3113                                 enum devlink_param_cmode cmode,
3114                                 union devlink_param_value val)
3115 {
3116         struct nlattr *param_value_attr;
3117
3118         param_value_attr = nla_nest_start_noflag(msg,
3119                                                  DEVLINK_ATTR_PARAM_VALUE);
3120         if (!param_value_attr)
3121                 goto nla_put_failure;
3122
3123         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3124                 goto value_nest_cancel;
3125
3126         switch (type) {
3127         case DEVLINK_PARAM_TYPE_U8:
3128                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3129                         goto value_nest_cancel;
3130                 break;
3131         case DEVLINK_PARAM_TYPE_U16:
3132                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3133                         goto value_nest_cancel;
3134                 break;
3135         case DEVLINK_PARAM_TYPE_U32:
3136                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3137                         goto value_nest_cancel;
3138                 break;
3139         case DEVLINK_PARAM_TYPE_STRING:
3140                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3141                                    val.vstr))
3142                         goto value_nest_cancel;
3143                 break;
3144         case DEVLINK_PARAM_TYPE_BOOL:
3145                 if (val.vbool &&
3146                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3147                         goto value_nest_cancel;
3148                 break;
3149         }
3150
3151         nla_nest_end(msg, param_value_attr);
3152         return 0;
3153
3154 value_nest_cancel:
3155         nla_nest_cancel(msg, param_value_attr);
3156 nla_put_failure:
3157         return -EMSGSIZE;
3158 }
3159
3160 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3161                                  unsigned int port_index,
3162                                  struct devlink_param_item *param_item,
3163                                  enum devlink_command cmd,
3164                                  u32 portid, u32 seq, int flags)
3165 {
3166         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3167         bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3168         const struct devlink_param *param = param_item->param;
3169         struct devlink_param_gset_ctx ctx;
3170         struct nlattr *param_values_list;
3171         struct nlattr *param_attr;
3172         int nla_type;
3173         void *hdr;
3174         int err;
3175         int i;
3176
3177         /* Get value from driver part to driverinit configuration mode */
3178         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3179                 if (!devlink_param_cmode_is_supported(param, i))
3180                         continue;
3181                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3182                         if (!param_item->driverinit_value_valid)
3183                                 return -EOPNOTSUPP;
3184                         param_value[i] = param_item->driverinit_value;
3185                 } else {
3186                         if (!param_item->published)
3187                                 continue;
3188                         ctx.cmode = i;
3189                         err = devlink_param_get(devlink, param, &ctx);
3190                         if (err)
3191                                 return err;
3192                         param_value[i] = ctx.val;
3193                 }
3194                 param_value_set[i] = true;
3195         }
3196
3197         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3198         if (!hdr)
3199                 return -EMSGSIZE;
3200
3201         if (devlink_nl_put_handle(msg, devlink))
3202                 goto genlmsg_cancel;
3203
3204         if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3205             cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3206             cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3207                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3208                         goto genlmsg_cancel;
3209
3210         param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3211         if (!param_attr)
3212                 goto genlmsg_cancel;
3213         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3214                 goto param_nest_cancel;
3215         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3216                 goto param_nest_cancel;
3217
3218         nla_type = devlink_param_type_to_nla_type(param->type);
3219         if (nla_type < 0)
3220                 goto param_nest_cancel;
3221         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3222                 goto param_nest_cancel;
3223
3224         param_values_list = nla_nest_start_noflag(msg,
3225                                                   DEVLINK_ATTR_PARAM_VALUES_LIST);
3226         if (!param_values_list)
3227                 goto param_nest_cancel;
3228
3229         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3230                 if (!param_value_set[i])
3231                         continue;
3232                 err = devlink_nl_param_value_fill_one(msg, param->type,
3233                                                       i, param_value[i]);
3234                 if (err)
3235                         goto values_list_nest_cancel;
3236         }
3237
3238         nla_nest_end(msg, param_values_list);
3239         nla_nest_end(msg, param_attr);
3240         genlmsg_end(msg, hdr);
3241         return 0;
3242
3243 values_list_nest_cancel:
3244         nla_nest_end(msg, param_values_list);
3245 param_nest_cancel:
3246         nla_nest_cancel(msg, param_attr);
3247 genlmsg_cancel:
3248         genlmsg_cancel(msg, hdr);
3249         return -EMSGSIZE;
3250 }
3251
3252 static void devlink_param_notify(struct devlink *devlink,
3253                                  unsigned int port_index,
3254                                  struct devlink_param_item *param_item,
3255                                  enum devlink_command cmd)
3256 {
3257         struct sk_buff *msg;
3258         int err;
3259
3260         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3261                 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3262                 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3263
3264         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3265         if (!msg)
3266                 return;
3267         err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3268                                     0, 0, 0);
3269         if (err) {
3270                 nlmsg_free(msg);
3271                 return;
3272         }
3273
3274         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3275                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3276 }
3277
3278 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3279                                            struct netlink_callback *cb)
3280 {
3281         struct devlink_param_item *param_item;
3282         struct devlink *devlink;
3283         int start = cb->args[0];
3284         int idx = 0;
3285         int err = 0;
3286
3287         mutex_lock(&devlink_mutex);
3288         list_for_each_entry(devlink, &devlink_list, list) {
3289                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3290                         continue;
3291                 mutex_lock(&devlink->lock);
3292                 list_for_each_entry(param_item, &devlink->param_list, list) {
3293                         if (idx < start) {
3294                                 idx++;
3295                                 continue;
3296                         }
3297                         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3298                                                     DEVLINK_CMD_PARAM_GET,
3299                                                     NETLINK_CB(cb->skb).portid,
3300                                                     cb->nlh->nlmsg_seq,
3301                                                     NLM_F_MULTI);
3302                         if (err && err != -EOPNOTSUPP) {
3303                                 mutex_unlock(&devlink->lock);
3304                                 goto out;
3305                         }
3306                         idx++;
3307                 }
3308                 mutex_unlock(&devlink->lock);
3309         }
3310 out:
3311         mutex_unlock(&devlink_mutex);
3312
3313         if (err != -EMSGSIZE)
3314                 return err;
3315
3316         cb->args[0] = idx;
3317         return msg->len;
3318 }
3319
3320 static int
3321 devlink_param_type_get_from_info(struct genl_info *info,
3322                                  enum devlink_param_type *param_type)
3323 {
3324         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3325                 return -EINVAL;
3326
3327         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3328         case NLA_U8:
3329                 *param_type = DEVLINK_PARAM_TYPE_U8;
3330                 break;
3331         case NLA_U16:
3332                 *param_type = DEVLINK_PARAM_TYPE_U16;
3333                 break;
3334         case NLA_U32:
3335                 *param_type = DEVLINK_PARAM_TYPE_U32;
3336                 break;
3337         case NLA_STRING:
3338                 *param_type = DEVLINK_PARAM_TYPE_STRING;
3339                 break;
3340         case NLA_FLAG:
3341                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3342                 break;
3343         default:
3344                 return -EINVAL;
3345         }
3346
3347         return 0;
3348 }
3349
3350 static int
3351 devlink_param_value_get_from_info(const struct devlink_param *param,
3352                                   struct genl_info *info,
3353                                   union devlink_param_value *value)
3354 {
3355         struct nlattr *param_data;
3356         int len;
3357
3358         param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
3359
3360         if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
3361                 return -EINVAL;
3362
3363         switch (param->type) {
3364         case DEVLINK_PARAM_TYPE_U8:
3365                 if (nla_len(param_data) != sizeof(u8))
3366                         return -EINVAL;
3367                 value->vu8 = nla_get_u8(param_data);
3368                 break;
3369         case DEVLINK_PARAM_TYPE_U16:
3370                 if (nla_len(param_data) != sizeof(u16))
3371                         return -EINVAL;
3372                 value->vu16 = nla_get_u16(param_data);
3373                 break;
3374         case DEVLINK_PARAM_TYPE_U32:
3375                 if (nla_len(param_data) != sizeof(u32))
3376                         return -EINVAL;
3377                 value->vu32 = nla_get_u32(param_data);
3378                 break;
3379         case DEVLINK_PARAM_TYPE_STRING:
3380                 len = strnlen(nla_data(param_data), nla_len(param_data));
3381                 if (len == nla_len(param_data) ||
3382                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3383                         return -EINVAL;
3384                 strcpy(value->vstr, nla_data(param_data));
3385                 break;
3386         case DEVLINK_PARAM_TYPE_BOOL:
3387                 if (param_data && nla_len(param_data))
3388                         return -EINVAL;
3389                 value->vbool = nla_get_flag(param_data);
3390                 break;
3391         }
3392         return 0;
3393 }
3394
3395 static struct devlink_param_item *
3396 devlink_param_get_from_info(struct list_head *param_list,
3397                             struct genl_info *info)
3398 {
3399         char *param_name;
3400
3401         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3402                 return NULL;
3403
3404         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3405         return devlink_param_find_by_name(param_list, param_name);
3406 }
3407
3408 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3409                                          struct genl_info *info)
3410 {
3411         struct devlink *devlink = info->user_ptr[0];
3412         struct devlink_param_item *param_item;
3413         struct sk_buff *msg;
3414         int err;
3415
3416         param_item = devlink_param_get_from_info(&devlink->param_list, info);
3417         if (!param_item)
3418                 return -EINVAL;
3419
3420         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3421         if (!msg)
3422                 return -ENOMEM;
3423
3424         err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3425                                     DEVLINK_CMD_PARAM_GET,
3426                                     info->snd_portid, info->snd_seq, 0);
3427         if (err) {
3428                 nlmsg_free(msg);
3429                 return err;
3430         }
3431
3432         return genlmsg_reply(msg, info);
3433 }
3434
3435 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3436                                            unsigned int port_index,
3437                                            struct list_head *param_list,
3438                                            struct genl_info *info,
3439                                            enum devlink_command cmd)
3440 {
3441         enum devlink_param_type param_type;
3442         struct devlink_param_gset_ctx ctx;
3443         enum devlink_param_cmode cmode;
3444         struct devlink_param_item *param_item;
3445         const struct devlink_param *param;
3446         union devlink_param_value value;
3447         int err = 0;
3448
3449         param_item = devlink_param_get_from_info(param_list, info);
3450         if (!param_item)
3451                 return -EINVAL;
3452         param = param_item->param;
3453         err = devlink_param_type_get_from_info(info, &param_type);
3454         if (err)
3455                 return err;
3456         if (param_type != param->type)
3457                 return -EINVAL;
3458         err = devlink_param_value_get_from_info(param, info, &value);
3459         if (err)
3460                 return err;
3461         if (param->validate) {
3462                 err = param->validate(devlink, param->id, value, info->extack);
3463                 if (err)
3464                         return err;
3465         }
3466
3467         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3468                 return -EINVAL;
3469         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3470         if (!devlink_param_cmode_is_supported(param, cmode))
3471                 return -EOPNOTSUPP;
3472
3473         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3474                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3475                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3476                 else
3477                         param_item->driverinit_value = value;
3478                 param_item->driverinit_value_valid = true;
3479         } else {
3480                 if (!param->set)
3481                         return -EOPNOTSUPP;
3482                 ctx.val = value;
3483                 ctx.cmode = cmode;
3484                 err = devlink_param_set(devlink, param, &ctx);
3485                 if (err)
3486                         return err;
3487         }
3488
3489         devlink_param_notify(devlink, port_index, param_item, cmd);
3490         return 0;
3491 }
3492
3493 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3494                                          struct genl_info *info)
3495 {
3496         struct devlink *devlink = info->user_ptr[0];
3497
3498         return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
3499                                                info, DEVLINK_CMD_PARAM_NEW);
3500 }
3501
3502 static int devlink_param_register_one(struct devlink *devlink,
3503                                       unsigned int port_index,
3504                                       struct list_head *param_list,
3505                                       const struct devlink_param *param,
3506                                       enum devlink_command cmd)
3507 {
3508         struct devlink_param_item *param_item;
3509
3510         if (devlink_param_find_by_name(param_list, param->name))
3511                 return -EEXIST;
3512
3513         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3514                 WARN_ON(param->get || param->set);
3515         else
3516                 WARN_ON(!param->get || !param->set);
3517
3518         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3519         if (!param_item)
3520                 return -ENOMEM;
3521         param_item->param = param;
3522
3523         list_add_tail(&param_item->list, param_list);
3524         devlink_param_notify(devlink, port_index, param_item, cmd);
3525         return 0;
3526 }
3527
3528 static void devlink_param_unregister_one(struct devlink *devlink,
3529                                          unsigned int port_index,
3530                                          struct list_head *param_list,
3531                                          const struct devlink_param *param,
3532                                          enum devlink_command cmd)
3533 {
3534         struct devlink_param_item *param_item;
3535
3536         param_item = devlink_param_find_by_name(param_list, param->name);
3537         WARN_ON(!param_item);
3538         devlink_param_notify(devlink, port_index, param_item, cmd);
3539         list_del(&param_item->list);
3540         kfree(param_item);
3541 }
3542
3543 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
3544                                                 struct netlink_callback *cb)
3545 {
3546         struct devlink_param_item *param_item;
3547         struct devlink_port *devlink_port;
3548         struct devlink *devlink;
3549         int start = cb->args[0];
3550         int idx = 0;
3551         int err = 0;
3552
3553         mutex_lock(&devlink_mutex);
3554         list_for_each_entry(devlink, &devlink_list, list) {
3555                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3556                         continue;
3557                 mutex_lock(&devlink->lock);
3558                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
3559                         list_for_each_entry(param_item,
3560                                             &devlink_port->param_list, list) {
3561                                 if (idx < start) {
3562                                         idx++;
3563                                         continue;
3564                                 }
3565                                 err = devlink_nl_param_fill(msg,
3566                                                 devlink_port->devlink,
3567                                                 devlink_port->index, param_item,
3568                                                 DEVLINK_CMD_PORT_PARAM_GET,
3569                                                 NETLINK_CB(cb->skb).portid,
3570                                                 cb->nlh->nlmsg_seq,
3571                                                 NLM_F_MULTI);
3572                                 if (err && err != -EOPNOTSUPP) {
3573                                         mutex_unlock(&devlink->lock);
3574                                         goto out;
3575                                 }
3576                                 idx++;
3577                         }
3578                 }
3579                 mutex_unlock(&devlink->lock);
3580         }
3581 out:
3582         mutex_unlock(&devlink_mutex);
3583
3584         if (err != -EMSGSIZE)
3585                 return err;
3586
3587         cb->args[0] = idx;
3588         return msg->len;
3589 }
3590
3591 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
3592                                               struct genl_info *info)
3593 {
3594         struct devlink_port *devlink_port = info->user_ptr[0];
3595         struct devlink_param_item *param_item;
3596         struct sk_buff *msg;
3597         int err;
3598
3599         param_item = devlink_param_get_from_info(&devlink_port->param_list,
3600                                                  info);
3601         if (!param_item)
3602                 return -EINVAL;
3603
3604         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3605         if (!msg)
3606                 return -ENOMEM;
3607
3608         err = devlink_nl_param_fill(msg, devlink_port->devlink,
3609                                     devlink_port->index, param_item,
3610                                     DEVLINK_CMD_PORT_PARAM_GET,
3611                                     info->snd_portid, info->snd_seq, 0);
3612         if (err) {
3613                 nlmsg_free(msg);
3614                 return err;
3615         }
3616
3617         return genlmsg_reply(msg, info);
3618 }
3619
3620 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
3621                                               struct genl_info *info)
3622 {
3623         struct devlink_port *devlink_port = info->user_ptr[0];
3624
3625         return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
3626                                                devlink_port->index,
3627                                                &devlink_port->param_list, info,
3628                                                DEVLINK_CMD_PORT_PARAM_NEW);
3629 }
3630
3631 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3632                                              struct devlink *devlink,
3633                                              struct devlink_snapshot *snapshot)
3634 {
3635         struct nlattr *snap_attr;
3636         int err;
3637
3638         snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3639         if (!snap_attr)
3640                 return -EINVAL;
3641
3642         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3643         if (err)
3644                 goto nla_put_failure;
3645
3646         nla_nest_end(msg, snap_attr);
3647         return 0;
3648
3649 nla_put_failure:
3650         nla_nest_cancel(msg, snap_attr);
3651         return err;
3652 }
3653
3654 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3655                                               struct devlink *devlink,
3656                                               struct devlink_region *region)
3657 {
3658         struct devlink_snapshot *snapshot;
3659         struct nlattr *snapshots_attr;
3660         int err;
3661
3662         snapshots_attr = nla_nest_start_noflag(msg,
3663                                                DEVLINK_ATTR_REGION_SNAPSHOTS);
3664         if (!snapshots_attr)
3665                 return -EINVAL;
3666
3667         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3668                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3669                 if (err)
3670                         goto nla_put_failure;
3671         }
3672
3673         nla_nest_end(msg, snapshots_attr);
3674         return 0;
3675
3676 nla_put_failure:
3677         nla_nest_cancel(msg, snapshots_attr);
3678         return err;
3679 }
3680
3681 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3682                                   enum devlink_command cmd, u32 portid,
3683                                   u32 seq, int flags,
3684                                   struct devlink_region *region)
3685 {
3686         void *hdr;
3687         int err;
3688
3689         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3690         if (!hdr)
3691                 return -EMSGSIZE;
3692
3693         err = devlink_nl_put_handle(msg, devlink);
3694         if (err)
3695                 goto nla_put_failure;
3696
3697         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name);
3698         if (err)
3699                 goto nla_put_failure;
3700
3701         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3702                                 region->size,
3703                                 DEVLINK_ATTR_PAD);
3704         if (err)
3705                 goto nla_put_failure;
3706
3707         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3708         if (err)
3709                 goto nla_put_failure;
3710
3711         genlmsg_end(msg, hdr);
3712         return 0;
3713
3714 nla_put_failure:
3715         genlmsg_cancel(msg, hdr);
3716         return err;
3717 }
3718
3719 static void devlink_nl_region_notify(struct devlink_region *region,
3720                                      struct devlink_snapshot *snapshot,
3721                                      enum devlink_command cmd)
3722 {
3723         struct devlink *devlink = region->devlink;
3724         struct sk_buff *msg;
3725         void *hdr;
3726         int err;
3727
3728         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3729
3730         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3731         if (!msg)
3732                 return;
3733
3734         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3735         if (!hdr)
3736                 goto out_free_msg;
3737
3738         err = devlink_nl_put_handle(msg, devlink);
3739         if (err)
3740                 goto out_cancel_msg;
3741
3742         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3743                              region->ops->name);
3744         if (err)
3745                 goto out_cancel_msg;
3746
3747         if (snapshot) {
3748                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3749                                   snapshot->id);
3750                 if (err)
3751                         goto out_cancel_msg;
3752         } else {
3753                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3754                                         region->size, DEVLINK_ATTR_PAD);
3755                 if (err)
3756                         goto out_cancel_msg;
3757         }
3758         genlmsg_end(msg, hdr);
3759
3760         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3761                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3762
3763         return;
3764
3765 out_cancel_msg:
3766         genlmsg_cancel(msg, hdr);
3767 out_free_msg:
3768         nlmsg_free(msg);
3769 }
3770
3771 /**
3772  * __devlink_snapshot_id_increment - Increment number of snapshots using an id
3773  *      @devlink: devlink instance
3774  *      @id: the snapshot id
3775  *
3776  *      Track when a new snapshot begins using an id. Load the count for the
3777  *      given id from the snapshot xarray, increment it, and store it back.
3778  *
3779  *      Called when a new snapshot is created with the given id.
3780  *
3781  *      The id *must* have been previously allocated by
3782  *      devlink_region_snapshot_id_get().
3783  *
3784  *      Returns 0 on success, or an error on failure.
3785  */
3786 static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
3787 {
3788         unsigned long count;
3789         void *p;
3790
3791         lockdep_assert_held(&devlink->lock);
3792
3793         p = xa_load(&devlink->snapshot_ids, id);
3794         if (WARN_ON(!p))
3795                 return -EINVAL;
3796
3797         if (WARN_ON(!xa_is_value(p)))
3798                 return -EINVAL;
3799
3800         count = xa_to_value(p);
3801         count++;
3802
3803         return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
3804                                GFP_KERNEL));
3805 }
3806
3807 /**
3808  * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id
3809  *      @devlink: devlink instance
3810  *      @id: the snapshot id
3811  *
3812  *      Track when a snapshot is deleted and stops using an id. Load the count
3813  *      for the given id from the snapshot xarray, decrement it, and store it
3814  *      back.
3815  *
3816  *      If the count reaches zero, erase this id from the xarray, freeing it
3817  *      up for future re-use by devlink_region_snapshot_id_get().
3818  *
3819  *      Called when a snapshot using the given id is deleted, and when the
3820  *      initial allocator of the id is finished using it.
3821  */
3822 static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
3823 {
3824         unsigned long count;
3825         void *p;
3826
3827         lockdep_assert_held(&devlink->lock);
3828
3829         p = xa_load(&devlink->snapshot_ids, id);
3830         if (WARN_ON(!p))
3831                 return;
3832
3833         if (WARN_ON(!xa_is_value(p)))
3834                 return;
3835
3836         count = xa_to_value(p);
3837
3838         if (count > 1) {
3839                 count--;
3840                 xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
3841                          GFP_KERNEL);
3842         } else {
3843                 /* If this was the last user, we can erase this id */
3844                 xa_erase(&devlink->snapshot_ids, id);
3845         }
3846 }
3847
3848 /**
3849  *      __devlink_snapshot_id_insert - Insert a specific snapshot ID
3850  *      @devlink: devlink instance
3851  *      @id: the snapshot id
3852  *
3853  *      Mark the given snapshot id as used by inserting a zero value into the
3854  *      snapshot xarray.
3855  *
3856  *      This must be called while holding the devlink instance lock. Unlike
3857  *      devlink_snapshot_id_get, the initial reference count is zero, not one.
3858  *      It is expected that the id will immediately be used before
3859  *      releasing the devlink instance lock.
3860  *
3861  *      Returns zero on success, or an error code if the snapshot id could not
3862  *      be inserted.
3863  */
3864 static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
3865 {
3866         lockdep_assert_held(&devlink->lock);
3867
3868         if (WARN_ON(xa_load(&devlink->snapshot_ids, id)))
3869                 return -EEXIST;
3870
3871         return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
3872                                GFP_KERNEL));
3873 }
3874
3875 /**
3876  *      __devlink_region_snapshot_id_get - get snapshot ID
3877  *      @devlink: devlink instance
3878  *      @id: storage to return snapshot id
3879  *
3880  *      Allocates a new snapshot id. Returns zero on success, or a negative
3881  *      error on failure. Must be called while holding the devlink instance
3882  *      lock.
3883  *
3884  *      Snapshot IDs are tracked using an xarray which stores the number of
3885  *      users of the snapshot id.
3886  *
3887  *      Note that the caller of this function counts as a 'user', in order to
3888  *      avoid race conditions. The caller must release its hold on the
3889  *      snapshot by using devlink_region_snapshot_id_put.
3890  */
3891 static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
3892 {
3893         lockdep_assert_held(&devlink->lock);
3894
3895         return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
3896                         xa_limit_32b, GFP_KERNEL);
3897 }
3898
3899 /**
3900  *      __devlink_region_snapshot_create - create a new snapshot
3901  *      This will add a new snapshot of a region. The snapshot
3902  *      will be stored on the region struct and can be accessed
3903  *      from devlink. This is useful for future analyses of snapshots.
3904  *      Multiple snapshots can be created on a region.
3905  *      The @snapshot_id should be obtained using the getter function.
3906  *
3907  *      Must be called only while holding the devlink instance lock.
3908  *
3909  *      @region: devlink region of the snapshot
3910  *      @data: snapshot data
3911  *      @snapshot_id: snapshot id to be created
3912  */
3913 static int
3914 __devlink_region_snapshot_create(struct devlink_region *region,
3915                                  u8 *data, u32 snapshot_id)
3916 {
3917         struct devlink *devlink = region->devlink;
3918         struct devlink_snapshot *snapshot;
3919         int err;
3920
3921         lockdep_assert_held(&devlink->lock);
3922
3923         /* check if region can hold one more snapshot */
3924         if (region->cur_snapshots == region->max_snapshots)
3925                 return -ENOSPC;
3926
3927         if (devlink_region_snapshot_get_by_id(region, snapshot_id))
3928                 return -EEXIST;
3929
3930         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
3931         if (!snapshot)
3932                 return -ENOMEM;
3933
3934         err = __devlink_snapshot_id_increment(devlink, snapshot_id);
3935         if (err)
3936                 goto err_snapshot_id_increment;
3937
3938         snapshot->id = snapshot_id;
3939         snapshot->region = region;
3940         snapshot->data = data;
3941
3942         list_add_tail(&snapshot->list, &region->snapshot_list);
3943
3944         region->cur_snapshots++;
3945
3946         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
3947         return 0;
3948
3949 err_snapshot_id_increment:
3950         kfree(snapshot);
3951         return err;
3952 }
3953
3954 static void devlink_region_snapshot_del(struct devlink_region *region,
3955                                         struct devlink_snapshot *snapshot)
3956 {
3957         struct devlink *devlink = region->devlink;
3958
3959         lockdep_assert_held(&devlink->lock);
3960
3961         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3962         region->cur_snapshots--;
3963         list_del(&snapshot->list);
3964         region->ops->destructor(snapshot->data);
3965         __devlink_snapshot_id_decrement(devlink, snapshot->id);
3966         kfree(snapshot);
3967 }
3968
3969 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3970                                           struct genl_info *info)
3971 {
3972         struct devlink *devlink = info->user_ptr[0];
3973         struct devlink_region *region;
3974         const char *region_name;
3975         struct sk_buff *msg;
3976         int err;
3977
3978         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3979                 return -EINVAL;
3980
3981         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3982         region = devlink_region_get_by_name(devlink, region_name);
3983         if (!region)
3984                 return -EINVAL;
3985
3986         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3987         if (!msg)
3988                 return -ENOMEM;
3989
3990         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3991                                      info->snd_portid, info->snd_seq, 0,
3992                                      region);
3993         if (err) {
3994                 nlmsg_free(msg);
3995                 return err;
3996         }
3997
3998         return genlmsg_reply(msg, info);
3999 }
4000
4001 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
4002                                             struct netlink_callback *cb)
4003 {
4004         struct devlink_region *region;
4005         struct devlink *devlink;
4006         int start = cb->args[0];
4007         int idx = 0;
4008         int err;
4009
4010         mutex_lock(&devlink_mutex);
4011         list_for_each_entry(devlink, &devlink_list, list) {
4012                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4013                         continue;
4014
4015                 mutex_lock(&devlink->lock);
4016                 list_for_each_entry(region, &devlink->region_list, list) {
4017                         if (idx < start) {
4018                                 idx++;
4019                                 continue;
4020                         }
4021                         err = devlink_nl_region_fill(msg, devlink,
4022                                                      DEVLINK_CMD_REGION_GET,
4023                                                      NETLINK_CB(cb->skb).portid,
4024                                                      cb->nlh->nlmsg_seq,
4025                                                      NLM_F_MULTI, region);
4026                         if (err) {
4027                                 mutex_unlock(&devlink->lock);
4028                                 goto out;
4029                         }
4030                         idx++;
4031                 }
4032                 mutex_unlock(&devlink->lock);
4033         }
4034 out:
4035         mutex_unlock(&devlink_mutex);
4036         cb->args[0] = idx;
4037         return msg->len;
4038 }
4039
4040 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
4041                                      struct genl_info *info)
4042 {
4043         struct devlink *devlink = info->user_ptr[0];
4044         struct devlink_snapshot *snapshot;
4045         struct devlink_region *region;
4046         const char *region_name;
4047         u32 snapshot_id;
4048
4049         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
4050             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
4051                 return -EINVAL;
4052
4053         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4054         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4055
4056         region = devlink_region_get_by_name(devlink, region_name);
4057         if (!region)
4058                 return -EINVAL;
4059
4060         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4061         if (!snapshot)
4062                 return -EINVAL;
4063
4064         devlink_region_snapshot_del(region, snapshot);
4065         return 0;
4066 }
4067
4068 static int
4069 devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
4070 {
4071         struct devlink *devlink = info->user_ptr[0];
4072         struct devlink_region *region;
4073         const char *region_name;
4074         u32 snapshot_id;
4075         u8 *data;
4076         int err;
4077
4078         if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) {
4079                 NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
4080                 return -EINVAL;
4081         }
4082
4083         if (!info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4084                 NL_SET_ERR_MSG_MOD(info->extack, "No snapshot id provided");
4085                 return -EINVAL;
4086         }
4087
4088         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4089         region = devlink_region_get_by_name(devlink, region_name);
4090         if (!region) {
4091                 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
4092                 return -EINVAL;
4093         }
4094
4095         if (!region->ops->snapshot) {
4096                 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
4097                 return -EOPNOTSUPP;
4098         }
4099
4100         if (region->cur_snapshots == region->max_snapshots) {
4101                 NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
4102                 return -ENOSPC;
4103         }
4104
4105         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4106
4107         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4108                 NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
4109                 return -EEXIST;
4110         }
4111
4112         err = __devlink_snapshot_id_insert(devlink, snapshot_id);
4113         if (err)
4114                 return err;
4115
4116         err = region->ops->snapshot(devlink, info->extack, &data);
4117         if (err)
4118                 goto err_snapshot_capture;
4119
4120         err = __devlink_region_snapshot_create(region, data, snapshot_id);
4121         if (err)
4122                 goto err_snapshot_create;
4123
4124         return 0;
4125
4126 err_snapshot_create:
4127         region->ops->destructor(data);
4128 err_snapshot_capture:
4129         __devlink_snapshot_id_decrement(devlink, snapshot_id);
4130         return err;
4131 }
4132
4133 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
4134                                                  struct devlink *devlink,
4135                                                  u8 *chunk, u32 chunk_size,
4136                                                  u64 addr)
4137 {
4138         struct nlattr *chunk_attr;
4139         int err;
4140
4141         chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
4142         if (!chunk_attr)
4143                 return -EINVAL;
4144
4145         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
4146         if (err)
4147                 goto nla_put_failure;
4148
4149         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
4150                                 DEVLINK_ATTR_PAD);
4151         if (err)
4152                 goto nla_put_failure;
4153
4154         nla_nest_end(msg, chunk_attr);
4155         return 0;
4156
4157 nla_put_failure:
4158         nla_nest_cancel(msg, chunk_attr);
4159         return err;
4160 }
4161
4162 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
4163
4164 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
4165                                                 struct devlink *devlink,
4166                                                 struct devlink_region *region,
4167                                                 struct nlattr **attrs,
4168                                                 u64 start_offset,
4169                                                 u64 end_offset,
4170                                                 bool dump,
4171                                                 u64 *new_offset)
4172 {
4173         struct devlink_snapshot *snapshot;
4174         u64 curr_offset = start_offset;
4175         u32 snapshot_id;
4176         int err = 0;
4177
4178         *new_offset = start_offset;
4179
4180         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4181         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4182         if (!snapshot)
4183                 return -EINVAL;
4184
4185         if (end_offset > region->size || dump)
4186                 end_offset = region->size;
4187
4188         while (curr_offset < end_offset) {
4189                 u32 data_size;
4190                 u8 *data;
4191
4192                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
4193                         data_size = end_offset - curr_offset;
4194                 else
4195                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
4196
4197                 data = &snapshot->data[curr_offset];
4198                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
4199                                                             data, data_size,
4200                                                             curr_offset);
4201                 if (err)
4202                         break;
4203
4204                 curr_offset += data_size;
4205         }
4206         *new_offset = curr_offset;
4207
4208         return err;
4209 }
4210
4211 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
4212                                              struct netlink_callback *cb)
4213 {
4214         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
4215         u64 ret_offset, start_offset, end_offset = 0;
4216         struct nlattr **attrs = info->attrs;
4217         struct devlink_region *region;
4218         struct nlattr *chunks_attr;
4219         const char *region_name;
4220         struct devlink *devlink;
4221         bool dump = true;
4222         void *hdr;
4223         int err;
4224
4225         start_offset = *((u64 *)&cb->args[0]);
4226
4227         mutex_lock(&devlink_mutex);
4228         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4229         if (IS_ERR(devlink)) {
4230                 err = PTR_ERR(devlink);
4231                 goto out_dev;
4232         }
4233
4234         mutex_lock(&devlink->lock);
4235
4236         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
4237             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4238                 err = -EINVAL;
4239                 goto out_unlock;
4240         }
4241
4242         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
4243         region = devlink_region_get_by_name(devlink, region_name);
4244         if (!region) {
4245                 err = -EINVAL;
4246                 goto out_unlock;
4247         }
4248
4249         /* return 0 if there is no further data to read */
4250         if (start_offset >= region->size) {
4251                 err = 0;
4252                 goto out_unlock;
4253         }
4254
4255         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4256                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
4257                           DEVLINK_CMD_REGION_READ);
4258         if (!hdr) {
4259                 err = -EMSGSIZE;
4260                 goto out_unlock;
4261         }
4262
4263         err = devlink_nl_put_handle(skb, devlink);
4264         if (err)
4265                 goto nla_put_failure;
4266
4267         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
4268         if (err)
4269                 goto nla_put_failure;
4270
4271         chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
4272         if (!chunks_attr) {
4273                 err = -EMSGSIZE;
4274                 goto nla_put_failure;
4275         }
4276
4277         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4278             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4279                 if (!start_offset)
4280                         start_offset =
4281                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4282
4283                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4284                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4285                 dump = false;
4286         }
4287
4288         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
4289                                                    region, attrs,
4290                                                    start_offset,
4291                                                    end_offset, dump,
4292                                                    &ret_offset);
4293
4294         if (err && err != -EMSGSIZE)
4295                 goto nla_put_failure;
4296
4297         /* Check if there was any progress done to prevent infinite loop */
4298         if (ret_offset == start_offset) {
4299                 err = -EINVAL;
4300                 goto nla_put_failure;
4301         }
4302
4303         *((u64 *)&cb->args[0]) = ret_offset;
4304
4305         nla_nest_end(skb, chunks_attr);
4306         genlmsg_end(skb, hdr);
4307         mutex_unlock(&devlink->lock);
4308         mutex_unlock(&devlink_mutex);
4309
4310         return skb->len;
4311
4312 nla_put_failure:
4313         genlmsg_cancel(skb, hdr);
4314 out_unlock:
4315         mutex_unlock(&devlink->lock);
4316 out_dev:
4317         mutex_unlock(&devlink_mutex);
4318         return err;
4319 }
4320
4321 struct devlink_info_req {
4322         struct sk_buff *msg;
4323 };
4324
4325 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
4326 {
4327         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
4328 }
4329 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
4330
4331 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
4332 {
4333         return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
4334 }
4335 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
4336
4337 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
4338                                     const char *version_name,
4339                                     const char *version_value)
4340 {
4341         struct nlattr *nest;
4342         int err;
4343
4344         nest = nla_nest_start_noflag(req->msg, attr);
4345         if (!nest)
4346                 return -EMSGSIZE;
4347
4348         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
4349                              version_name);
4350         if (err)
4351                 goto nla_put_failure;
4352
4353         err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
4354                              version_value);
4355         if (err)
4356                 goto nla_put_failure;
4357
4358         nla_nest_end(req->msg, nest);
4359
4360         return 0;
4361
4362 nla_put_failure:
4363         nla_nest_cancel(req->msg, nest);
4364         return err;
4365 }
4366
4367 int devlink_info_version_fixed_put(struct devlink_info_req *req,
4368                                    const char *version_name,
4369                                    const char *version_value)
4370 {
4371         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
4372                                         version_name, version_value);
4373 }
4374 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
4375
4376 int devlink_info_version_stored_put(struct devlink_info_req *req,
4377                                     const char *version_name,
4378                                     const char *version_value)
4379 {
4380         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
4381                                         version_name, version_value);
4382 }
4383 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
4384
4385 int devlink_info_version_running_put(struct devlink_info_req *req,
4386                                      const char *version_name,
4387                                      const char *version_value)
4388 {
4389         return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
4390                                         version_name, version_value);
4391 }
4392 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
4393
4394 static int
4395 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
4396                      enum devlink_command cmd, u32 portid,
4397                      u32 seq, int flags, struct netlink_ext_ack *extack)
4398 {
4399         struct devlink_info_req req;
4400         void *hdr;
4401         int err;
4402
4403         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4404         if (!hdr)
4405                 return -EMSGSIZE;
4406
4407         err = -EMSGSIZE;
4408         if (devlink_nl_put_handle(msg, devlink))
4409                 goto err_cancel_msg;
4410
4411         req.msg = msg;
4412         err = devlink->ops->info_get(devlink, &req, extack);
4413         if (err)
4414                 goto err_cancel_msg;
4415
4416         genlmsg_end(msg, hdr);
4417         return 0;
4418
4419 err_cancel_msg:
4420         genlmsg_cancel(msg, hdr);
4421         return err;
4422 }
4423
4424 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
4425                                         struct genl_info *info)
4426 {
4427         struct devlink *devlink = info->user_ptr[0];
4428         struct sk_buff *msg;
4429         int err;
4430
4431         if (!devlink->ops->info_get)
4432                 return -EOPNOTSUPP;
4433
4434         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4435         if (!msg)
4436                 return -ENOMEM;
4437
4438         err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4439                                    info->snd_portid, info->snd_seq, 0,
4440                                    info->extack);
4441         if (err) {
4442                 nlmsg_free(msg);
4443                 return err;
4444         }
4445
4446         return genlmsg_reply(msg, info);
4447 }
4448
4449 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
4450                                           struct netlink_callback *cb)
4451 {
4452         struct devlink *devlink;
4453         int start = cb->args[0];
4454         int idx = 0;
4455         int err = 0;
4456
4457         mutex_lock(&devlink_mutex);
4458         list_for_each_entry(devlink, &devlink_list, list) {
4459                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4460                         continue;
4461                 if (idx < start) {
4462                         idx++;
4463                         continue;
4464                 }
4465
4466                 if (!devlink->ops->info_get) {
4467                         idx++;
4468                         continue;
4469                 }
4470
4471                 mutex_lock(&devlink->lock);
4472                 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
4473                                            NETLINK_CB(cb->skb).portid,
4474                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4475                                            cb->extack);
4476                 mutex_unlock(&devlink->lock);
4477                 if (err && err != -EOPNOTSUPP)
4478                         break;
4479                 idx++;
4480         }
4481         mutex_unlock(&devlink_mutex);
4482
4483         if (err != -EMSGSIZE)
4484                 return err;
4485
4486         cb->args[0] = idx;
4487         return msg->len;
4488 }
4489
4490 struct devlink_fmsg_item {
4491         struct list_head list;
4492         int attrtype;
4493         u8 nla_type;
4494         u16 len;
4495         int value[];
4496 };
4497
4498 struct devlink_fmsg {
4499         struct list_head item_list;
4500         bool putting_binary; /* This flag forces enclosing of binary data
4501                               * in an array brackets. It forces using
4502                               * of designated API:
4503                               * devlink_fmsg_binary_pair_nest_start()
4504                               * devlink_fmsg_binary_pair_nest_end()
4505                               */
4506 };
4507
4508 static struct devlink_fmsg *devlink_fmsg_alloc(void)
4509 {
4510         struct devlink_fmsg *fmsg;
4511
4512         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
4513         if (!fmsg)
4514                 return NULL;
4515
4516         INIT_LIST_HEAD(&fmsg->item_list);
4517
4518         return fmsg;
4519 }
4520
4521 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
4522 {
4523         struct devlink_fmsg_item *item, *tmp;
4524
4525         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
4526                 list_del(&item->list);
4527                 kfree(item);
4528         }
4529         kfree(fmsg);
4530 }
4531
4532 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
4533                                     int attrtype)
4534 {
4535         struct devlink_fmsg_item *item;
4536
4537         item = kzalloc(sizeof(*item), GFP_KERNEL);
4538         if (!item)
4539                 return -ENOMEM;
4540
4541         item->attrtype = attrtype;
4542         list_add_tail(&item->list, &fmsg->item_list);
4543
4544         return 0;
4545 }
4546
4547 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
4548 {
4549         if (fmsg->putting_binary)
4550                 return -EINVAL;
4551
4552         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
4553 }
4554 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
4555
4556 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
4557 {
4558         if (fmsg->putting_binary)
4559                 return -EINVAL;
4560
4561         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
4562 }
4563
4564 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
4565 {
4566         if (fmsg->putting_binary)
4567                 return -EINVAL;
4568
4569         return devlink_fmsg_nest_end(fmsg);
4570 }
4571 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
4572
4573 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
4574
4575 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
4576 {
4577         struct devlink_fmsg_item *item;
4578
4579         if (fmsg->putting_binary)
4580                 return -EINVAL;
4581
4582         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
4583                 return -EMSGSIZE;
4584
4585         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
4586         if (!item)
4587                 return -ENOMEM;
4588
4589         item->nla_type = NLA_NUL_STRING;
4590         item->len = strlen(name) + 1;
4591         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
4592         memcpy(&item->value, name, item->len);
4593         list_add_tail(&item->list, &fmsg->item_list);
4594
4595         return 0;
4596 }
4597
4598 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
4599 {
4600         int err;
4601
4602         if (fmsg->putting_binary)
4603                 return -EINVAL;
4604
4605         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
4606         if (err)
4607                 return err;
4608
4609         err = devlink_fmsg_put_name(fmsg, name);
4610         if (err)
4611                 return err;
4612
4613         return 0;
4614 }
4615 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
4616
4617 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
4618 {
4619         if (fmsg->putting_binary)
4620                 return -EINVAL;
4621
4622         return devlink_fmsg_nest_end(fmsg);
4623 }
4624 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
4625
4626 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
4627                                      const char *name)
4628 {
4629         int err;
4630
4631         if (fmsg->putting_binary)
4632                 return -EINVAL;
4633
4634         err = devlink_fmsg_pair_nest_start(fmsg, name);
4635         if (err)
4636                 return err;
4637
4638         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
4639         if (err)
4640                 return err;
4641
4642         return 0;
4643 }
4644 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
4645
4646 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
4647 {
4648         int err;
4649
4650         if (fmsg->putting_binary)
4651                 return -EINVAL;
4652
4653         err = devlink_fmsg_nest_end(fmsg);
4654         if (err)
4655                 return err;
4656
4657         err = devlink_fmsg_nest_end(fmsg);
4658         if (err)
4659                 return err;
4660
4661         return 0;
4662 }
4663 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
4664
4665 int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
4666                                         const char *name)
4667 {
4668         int err;
4669
4670         err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
4671         if (err)
4672                 return err;
4673
4674         fmsg->putting_binary = true;
4675         return err;
4676 }
4677 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
4678
4679 int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
4680 {
4681         if (!fmsg->putting_binary)
4682                 return -EINVAL;
4683
4684         fmsg->putting_binary = false;
4685         return devlink_fmsg_arr_pair_nest_end(fmsg);
4686 }
4687 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
4688
4689 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
4690                                   const void *value, u16 value_len,
4691                                   u8 value_nla_type)
4692 {
4693         struct devlink_fmsg_item *item;
4694
4695         if (value_len > DEVLINK_FMSG_MAX_SIZE)
4696                 return -EMSGSIZE;
4697
4698         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
4699         if (!item)
4700                 return -ENOMEM;
4701
4702         item->nla_type = value_nla_type;
4703         item->len = value_len;
4704         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4705         memcpy(&item->value, value, item->len);
4706         list_add_tail(&item->list, &fmsg->item_list);
4707
4708         return 0;
4709 }
4710
4711 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
4712 {
4713         if (fmsg->putting_binary)
4714                 return -EINVAL;
4715
4716         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
4717 }
4718 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
4719
4720 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
4721 {
4722         if (fmsg->putting_binary)
4723                 return -EINVAL;
4724
4725         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
4726 }
4727 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
4728
4729 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
4730 {
4731         if (fmsg->putting_binary)
4732                 return -EINVAL;
4733
4734         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
4735 }
4736 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
4737
4738 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
4739 {
4740         if (fmsg->putting_binary)
4741                 return -EINVAL;
4742
4743         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
4744 }
4745 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
4746
4747 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
4748 {
4749         if (fmsg->putting_binary)
4750                 return -EINVAL;
4751
4752         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
4753                                       NLA_NUL_STRING);
4754 }
4755 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
4756
4757 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
4758                             u16 value_len)
4759 {
4760         if (!fmsg->putting_binary)
4761                 return -EINVAL;
4762
4763         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
4764 }
4765 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
4766
4767 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
4768                                bool value)
4769 {
4770         int err;
4771
4772         err = devlink_fmsg_pair_nest_start(fmsg, name);
4773         if (err)
4774                 return err;
4775
4776         err = devlink_fmsg_bool_put(fmsg, value);
4777         if (err)
4778                 return err;
4779
4780         err = devlink_fmsg_pair_nest_end(fmsg);
4781         if (err)
4782                 return err;
4783
4784         return 0;
4785 }
4786 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
4787
4788 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
4789                              u8 value)
4790 {
4791         int err;
4792
4793         err = devlink_fmsg_pair_nest_start(fmsg, name);
4794         if (err)
4795                 return err;
4796
4797         err = devlink_fmsg_u8_put(fmsg, value);
4798         if (err)
4799                 return err;
4800
4801         err = devlink_fmsg_pair_nest_end(fmsg);
4802         if (err)
4803                 return err;
4804
4805         return 0;
4806 }
4807 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
4808
4809 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
4810                               u32 value)
4811 {
4812         int err;
4813
4814         err = devlink_fmsg_pair_nest_start(fmsg, name);
4815         if (err)
4816                 return err;
4817
4818         err = devlink_fmsg_u32_put(fmsg, value);
4819         if (err)
4820                 return err;
4821
4822         err = devlink_fmsg_pair_nest_end(fmsg);
4823         if (err)
4824                 return err;
4825
4826         return 0;
4827 }
4828 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
4829
4830 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
4831                               u64 value)
4832 {
4833         int err;
4834
4835         err = devlink_fmsg_pair_nest_start(fmsg, name);
4836         if (err)
4837                 return err;
4838
4839         err = devlink_fmsg_u64_put(fmsg, value);
4840         if (err)
4841                 return err;
4842
4843         err = devlink_fmsg_pair_nest_end(fmsg);
4844         if (err)
4845                 return err;
4846
4847         return 0;
4848 }
4849 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
4850
4851 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
4852                                  const char *value)
4853 {
4854         int err;
4855
4856         err = devlink_fmsg_pair_nest_start(fmsg, name);
4857         if (err)
4858                 return err;
4859
4860         err = devlink_fmsg_string_put(fmsg, value);
4861         if (err)
4862                 return err;
4863
4864         err = devlink_fmsg_pair_nest_end(fmsg);
4865         if (err)
4866                 return err;
4867
4868         return 0;
4869 }
4870 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
4871
4872 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
4873                                  const void *value, u32 value_len)
4874 {
4875         u32 data_size;
4876         int end_err;
4877         u32 offset;
4878         int err;
4879
4880         err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
4881         if (err)
4882                 return err;
4883
4884         for (offset = 0; offset < value_len; offset += data_size) {
4885                 data_size = value_len - offset;
4886                 if (data_size > DEVLINK_FMSG_MAX_SIZE)
4887                         data_size = DEVLINK_FMSG_MAX_SIZE;
4888                 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
4889                 if (err)
4890                         break;
4891                 /* Exit from loop with a break (instead of
4892                  * return) to make sure putting_binary is turned off in
4893                  * devlink_fmsg_binary_pair_nest_end
4894                  */
4895         }
4896
4897         end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
4898         if (end_err)
4899                 err = end_err;
4900
4901         return err;
4902 }
4903 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
4904
4905 static int
4906 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4907 {
4908         switch (msg->nla_type) {
4909         case NLA_FLAG:
4910         case NLA_U8:
4911         case NLA_U32:
4912         case NLA_U64:
4913         case NLA_NUL_STRING:
4914         case NLA_BINARY:
4915                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
4916                                   msg->nla_type);
4917         default:
4918                 return -EINVAL;
4919         }
4920 }
4921
4922 static int
4923 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
4924 {
4925         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
4926         u8 tmp;
4927
4928         switch (msg->nla_type) {
4929         case NLA_FLAG:
4930                 /* Always provide flag data, regardless of its value */
4931                 tmp = *(bool *) msg->value;
4932
4933                 return nla_put_u8(skb, attrtype, tmp);
4934         case NLA_U8:
4935                 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
4936         case NLA_U32:
4937                 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
4938         case NLA_U64:
4939                 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
4940                                          DEVLINK_ATTR_PAD);
4941         case NLA_NUL_STRING:
4942                 return nla_put_string(skb, attrtype, (char *) &msg->value);
4943         case NLA_BINARY:
4944                 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
4945         default:
4946                 return -EINVAL;
4947         }
4948 }
4949
4950 static int
4951 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
4952                          int *start)
4953 {
4954         struct devlink_fmsg_item *item;
4955         struct nlattr *fmsg_nlattr;
4956         int i = 0;
4957         int err;
4958
4959         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
4960         if (!fmsg_nlattr)
4961                 return -EMSGSIZE;
4962
4963         list_for_each_entry(item, &fmsg->item_list, list) {
4964                 if (i < *start) {
4965                         i++;
4966                         continue;
4967                 }
4968
4969                 switch (item->attrtype) {
4970                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
4971                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
4972                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
4973                 case DEVLINK_ATTR_FMSG_NEST_END:
4974                         err = nla_put_flag(skb, item->attrtype);
4975                         break;
4976                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
4977                         err = devlink_fmsg_item_fill_type(item, skb);
4978                         if (err)
4979                                 break;
4980                         err = devlink_fmsg_item_fill_data(item, skb);
4981                         break;
4982                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
4983                         err = nla_put_string(skb, item->attrtype,
4984                                              (char *) &item->value);
4985                         break;
4986                 default:
4987                         err = -EINVAL;
4988                         break;
4989                 }
4990                 if (!err)
4991                         *start = ++i;
4992                 else
4993                         break;
4994         }
4995
4996         nla_nest_end(skb, fmsg_nlattr);
4997         return err;
4998 }
4999
5000 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
5001                             struct genl_info *info,
5002                             enum devlink_command cmd, int flags)
5003 {
5004         struct nlmsghdr *nlh;
5005         struct sk_buff *skb;
5006         bool last = false;
5007         int index = 0;
5008         void *hdr;
5009         int err;
5010
5011         while (!last) {
5012                 int tmp_index = index;
5013
5014                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5015                 if (!skb)
5016                         return -ENOMEM;
5017
5018                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
5019                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
5020                 if (!hdr) {
5021                         err = -EMSGSIZE;
5022                         goto nla_put_failure;
5023                 }
5024
5025                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5026                 if (!err)
5027                         last = true;
5028                 else if (err != -EMSGSIZE || tmp_index == index)
5029                         goto nla_put_failure;
5030
5031                 genlmsg_end(skb, hdr);
5032                 err = genlmsg_reply(skb, info);
5033                 if (err)
5034                         return err;
5035         }
5036
5037         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5038         if (!skb)
5039                 return -ENOMEM;
5040         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
5041                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
5042         if (!nlh) {
5043                 err = -EMSGSIZE;
5044                 goto nla_put_failure;
5045         }
5046
5047         return genlmsg_reply(skb, info);
5048
5049 nla_put_failure:
5050         nlmsg_free(skb);
5051         return err;
5052 }
5053
5054 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5055                                struct netlink_callback *cb,
5056                                enum devlink_command cmd)
5057 {
5058         int index = cb->args[0];
5059         int tmp_index = index;
5060         void *hdr;
5061         int err;
5062
5063         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
5064                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
5065         if (!hdr) {
5066                 err = -EMSGSIZE;
5067                 goto nla_put_failure;
5068         }
5069
5070         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5071         if ((err && err != -EMSGSIZE) || tmp_index == index)
5072                 goto nla_put_failure;
5073
5074         cb->args[0] = index;
5075         genlmsg_end(skb, hdr);
5076         return skb->len;
5077
5078 nla_put_failure:
5079         genlmsg_cancel(skb, hdr);
5080         return err;
5081 }
5082
5083 struct devlink_health_reporter {
5084         struct list_head list;
5085         void *priv;
5086         const struct devlink_health_reporter_ops *ops;
5087         struct devlink *devlink;
5088         struct devlink_fmsg *dump_fmsg;
5089         struct mutex dump_lock; /* lock parallel read/write from dump buffers */
5090         u64 graceful_period;
5091         bool auto_recover;
5092         bool auto_dump;
5093         u8 health_state;
5094         u64 dump_ts;
5095         u64 dump_real_ts;
5096         u64 error_count;
5097         u64 recovery_count;
5098         u64 last_recovery_ts;
5099         refcount_t refcount;
5100 };
5101
5102 void *
5103 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
5104 {
5105         return reporter->priv;
5106 }
5107 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
5108
5109 static struct devlink_health_reporter *
5110 devlink_health_reporter_find_by_name(struct devlink *devlink,
5111                                      const char *reporter_name)
5112 {
5113         struct devlink_health_reporter *reporter;
5114
5115         lockdep_assert_held(&devlink->reporters_lock);
5116         list_for_each_entry(reporter, &devlink->reporter_list, list)
5117                 if (!strcmp(reporter->ops->name, reporter_name))
5118                         return reporter;
5119         return NULL;
5120 }
5121
5122 /**
5123  *      devlink_health_reporter_create - create devlink health reporter
5124  *
5125  *      @devlink: devlink
5126  *      @ops: ops
5127  *      @graceful_period: to avoid recovery loops, in msecs
5128  *      @priv: priv
5129  */
5130 struct devlink_health_reporter *
5131 devlink_health_reporter_create(struct devlink *devlink,
5132                                const struct devlink_health_reporter_ops *ops,
5133                                u64 graceful_period, void *priv)
5134 {
5135         struct devlink_health_reporter *reporter;
5136
5137         mutex_lock(&devlink->reporters_lock);
5138         if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
5139                 reporter = ERR_PTR(-EEXIST);
5140                 goto unlock;
5141         }
5142
5143         if (WARN_ON(graceful_period && !ops->recover)) {
5144                 reporter = ERR_PTR(-EINVAL);
5145                 goto unlock;
5146         }
5147
5148         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
5149         if (!reporter) {
5150                 reporter = ERR_PTR(-ENOMEM);
5151                 goto unlock;
5152         }
5153
5154         reporter->priv = priv;
5155         reporter->ops = ops;
5156         reporter->devlink = devlink;
5157         reporter->graceful_period = graceful_period;
5158         reporter->auto_recover = !!ops->recover;
5159         reporter->auto_dump = !!ops->dump;
5160         mutex_init(&reporter->dump_lock);
5161         refcount_set(&reporter->refcount, 1);
5162         list_add_tail(&reporter->list, &devlink->reporter_list);
5163 unlock:
5164         mutex_unlock(&devlink->reporters_lock);
5165         return reporter;
5166 }
5167 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
5168
5169 /**
5170  *      devlink_health_reporter_destroy - destroy devlink health reporter
5171  *
5172  *      @reporter: devlink health reporter to destroy
5173  */
5174 void
5175 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5176 {
5177         mutex_lock(&reporter->devlink->reporters_lock);
5178         list_del(&reporter->list);
5179         mutex_unlock(&reporter->devlink->reporters_lock);
5180         while (refcount_read(&reporter->refcount) > 1)
5181                 msleep(100);
5182         mutex_destroy(&reporter->dump_lock);
5183         if (reporter->dump_fmsg)
5184                 devlink_fmsg_free(reporter->dump_fmsg);
5185         kfree(reporter);
5186 }
5187 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
5188
5189 static int
5190 devlink_nl_health_reporter_fill(struct sk_buff *msg,
5191                                 struct devlink *devlink,
5192                                 struct devlink_health_reporter *reporter,
5193                                 enum devlink_command cmd, u32 portid,
5194                                 u32 seq, int flags)
5195 {
5196         struct nlattr *reporter_attr;
5197         void *hdr;
5198
5199         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5200         if (!hdr)
5201                 return -EMSGSIZE;
5202
5203         if (devlink_nl_put_handle(msg, devlink))
5204                 goto genlmsg_cancel;
5205
5206         reporter_attr = nla_nest_start_noflag(msg,
5207                                               DEVLINK_ATTR_HEALTH_REPORTER);
5208         if (!reporter_attr)
5209                 goto genlmsg_cancel;
5210         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
5211                            reporter->ops->name))
5212                 goto reporter_nest_cancel;
5213         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
5214                        reporter->health_state))
5215                 goto reporter_nest_cancel;
5216         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
5217                               reporter->error_count, DEVLINK_ATTR_PAD))
5218                 goto reporter_nest_cancel;
5219         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
5220                               reporter->recovery_count, DEVLINK_ATTR_PAD))
5221                 goto reporter_nest_cancel;
5222         if (reporter->ops->recover &&
5223             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
5224                               reporter->graceful_period,
5225                               DEVLINK_ATTR_PAD))
5226                 goto reporter_nest_cancel;
5227         if (reporter->ops->recover &&
5228             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
5229                        reporter->auto_recover))
5230                 goto reporter_nest_cancel;
5231         if (reporter->dump_fmsg &&
5232             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
5233                               jiffies_to_msecs(reporter->dump_ts),
5234                               DEVLINK_ATTR_PAD))
5235                 goto reporter_nest_cancel;
5236         if (reporter->dump_fmsg &&
5237             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
5238                               reporter->dump_real_ts, DEVLINK_ATTR_PAD))
5239                 goto reporter_nest_cancel;
5240         if (reporter->ops->dump &&
5241             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
5242                        reporter->auto_dump))
5243                 goto reporter_nest_cancel;
5244
5245         nla_nest_end(msg, reporter_attr);
5246         genlmsg_end(msg, hdr);
5247         return 0;
5248
5249 reporter_nest_cancel:
5250         nla_nest_end(msg, reporter_attr);
5251 genlmsg_cancel:
5252         genlmsg_cancel(msg, hdr);
5253         return -EMSGSIZE;
5254 }
5255
5256 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
5257                                    enum devlink_command cmd)
5258 {
5259         struct sk_buff *msg;
5260         int err;
5261
5262         WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5263
5264         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5265         if (!msg)
5266                 return;
5267
5268         err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
5269                                               reporter, cmd, 0, 0, 0);
5270         if (err) {
5271                 nlmsg_free(msg);
5272                 return;
5273         }
5274
5275         genlmsg_multicast_netns(&devlink_nl_family,
5276                                 devlink_net(reporter->devlink),
5277                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
5278 }
5279
5280 void
5281 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
5282 {
5283         reporter->recovery_count++;
5284         reporter->last_recovery_ts = jiffies;
5285 }
5286 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
5287
5288 static int
5289 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
5290                                 void *priv_ctx, struct netlink_ext_ack *extack)
5291 {
5292         int err;
5293
5294         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
5295                 return 0;
5296
5297         if (!reporter->ops->recover)
5298                 return -EOPNOTSUPP;
5299
5300         err = reporter->ops->recover(reporter, priv_ctx, extack);
5301         if (err)
5302                 return err;
5303
5304         devlink_health_reporter_recovery_done(reporter);
5305         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
5306         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5307
5308         return 0;
5309 }
5310
5311 static void
5312 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
5313 {
5314         if (!reporter->dump_fmsg)
5315                 return;
5316         devlink_fmsg_free(reporter->dump_fmsg);
5317         reporter->dump_fmsg = NULL;
5318 }
5319
5320 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
5321                                   void *priv_ctx,
5322                                   struct netlink_ext_ack *extack)
5323 {
5324         int err;
5325
5326         if (!reporter->ops->dump)
5327                 return 0;
5328
5329         if (reporter->dump_fmsg)
5330                 return 0;
5331
5332         reporter->dump_fmsg = devlink_fmsg_alloc();
5333         if (!reporter->dump_fmsg) {
5334                 err = -ENOMEM;
5335                 return err;
5336         }
5337
5338         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
5339         if (err)
5340                 goto dump_err;
5341
5342         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
5343                                   priv_ctx, extack);
5344         if (err)
5345                 goto dump_err;
5346
5347         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
5348         if (err)
5349                 goto dump_err;
5350
5351         reporter->dump_ts = jiffies;
5352         reporter->dump_real_ts = ktime_get_real_ns();
5353
5354         return 0;
5355
5356 dump_err:
5357         devlink_health_dump_clear(reporter);
5358         return err;
5359 }
5360
5361 int devlink_health_report(struct devlink_health_reporter *reporter,
5362                           const char *msg, void *priv_ctx)
5363 {
5364         enum devlink_health_reporter_state prev_health_state;
5365         struct devlink *devlink = reporter->devlink;
5366
5367         /* write a log message of the current error */
5368         WARN_ON(!msg);
5369         trace_devlink_health_report(devlink, reporter->ops->name, msg);
5370         reporter->error_count++;
5371         prev_health_state = reporter->health_state;
5372         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5373         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5374
5375         /* abort if the previous error wasn't recovered */
5376         if (reporter->auto_recover &&
5377             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
5378              jiffies - reporter->last_recovery_ts <
5379              msecs_to_jiffies(reporter->graceful_period))) {
5380                 trace_devlink_health_recover_aborted(devlink,
5381                                                      reporter->ops->name,
5382                                                      reporter->health_state,
5383                                                      jiffies -
5384                                                      reporter->last_recovery_ts);
5385                 return -ECANCELED;
5386         }
5387
5388         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
5389
5390         if (reporter->auto_dump) {
5391                 mutex_lock(&reporter->dump_lock);
5392                 /* store current dump of current error, for later analysis */
5393                 devlink_health_do_dump(reporter, priv_ctx, NULL);
5394                 mutex_unlock(&reporter->dump_lock);
5395         }
5396
5397         if (reporter->auto_recover)
5398                 return devlink_health_reporter_recover(reporter,
5399                                                        priv_ctx, NULL);
5400
5401         return 0;
5402 }
5403 EXPORT_SYMBOL_GPL(devlink_health_report);
5404
5405 static struct devlink_health_reporter *
5406 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
5407                                        struct nlattr **attrs)
5408 {
5409         struct devlink_health_reporter *reporter;
5410         char *reporter_name;
5411
5412         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
5413                 return NULL;
5414
5415         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
5416         mutex_lock(&devlink->reporters_lock);
5417         reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
5418         if (reporter)
5419                 refcount_inc(&reporter->refcount);
5420         mutex_unlock(&devlink->reporters_lock);
5421         return reporter;
5422 }
5423
5424 static struct devlink_health_reporter *
5425 devlink_health_reporter_get_from_info(struct devlink *devlink,
5426                                       struct genl_info *info)
5427 {
5428         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
5429 }
5430
5431 static struct devlink_health_reporter *
5432 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
5433 {
5434         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
5435         struct devlink_health_reporter *reporter;
5436         struct nlattr **attrs = info->attrs;
5437         struct devlink *devlink;
5438
5439         mutex_lock(&devlink_mutex);
5440         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
5441         if (IS_ERR(devlink))
5442                 goto unlock;
5443
5444         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
5445         mutex_unlock(&devlink_mutex);
5446         return reporter;
5447 unlock:
5448         mutex_unlock(&devlink_mutex);
5449         return NULL;
5450 }
5451
5452 static void
5453 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5454 {
5455         refcount_dec(&reporter->refcount);
5456 }
5457
5458 void
5459 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
5460                                      enum devlink_health_reporter_state state)
5461 {
5462         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
5463                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
5464                 return;
5465
5466         if (reporter->health_state == state)
5467                 return;
5468
5469         reporter->health_state = state;
5470         trace_devlink_health_reporter_state_update(reporter->devlink,
5471                                                    reporter->ops->name, state);
5472         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
5473 }
5474 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
5475
5476 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
5477                                                    struct genl_info *info)
5478 {
5479         struct devlink *devlink = info->user_ptr[0];
5480         struct devlink_health_reporter *reporter;
5481         struct sk_buff *msg;
5482         int err;
5483
5484         reporter = devlink_health_reporter_get_from_info(devlink, info);
5485         if (!reporter)
5486                 return -EINVAL;
5487
5488         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5489         if (!msg) {
5490                 err = -ENOMEM;
5491                 goto out;
5492         }
5493
5494         err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
5495                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5496                                               info->snd_portid, info->snd_seq,
5497                                               0);
5498         if (err) {
5499                 nlmsg_free(msg);
5500                 goto out;
5501         }
5502
5503         err = genlmsg_reply(msg, info);
5504 out:
5505         devlink_health_reporter_put(reporter);
5506         return err;
5507 }
5508
5509 static int
5510 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
5511                                           struct netlink_callback *cb)
5512 {
5513         struct devlink_health_reporter *reporter;
5514         struct devlink *devlink;
5515         int start = cb->args[0];
5516         int idx = 0;
5517         int err;
5518
5519         mutex_lock(&devlink_mutex);
5520         list_for_each_entry(devlink, &devlink_list, list) {
5521                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5522                         continue;
5523                 mutex_lock(&devlink->reporters_lock);
5524                 list_for_each_entry(reporter, &devlink->reporter_list,
5525                                     list) {
5526                         if (idx < start) {
5527                                 idx++;
5528                                 continue;
5529                         }
5530                         err = devlink_nl_health_reporter_fill(msg, devlink,
5531                                                               reporter,
5532                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
5533                                                               NETLINK_CB(cb->skb).portid,
5534                                                               cb->nlh->nlmsg_seq,
5535                                                               NLM_F_MULTI);
5536                         if (err) {
5537                                 mutex_unlock(&devlink->reporters_lock);
5538                                 goto out;
5539                         }
5540                         idx++;
5541                 }
5542                 mutex_unlock(&devlink->reporters_lock);
5543         }
5544 out:
5545         mutex_unlock(&devlink_mutex);
5546
5547         cb->args[0] = idx;
5548         return msg->len;
5549 }
5550
5551 static int
5552 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
5553                                         struct genl_info *info)
5554 {
5555         struct devlink *devlink = info->user_ptr[0];
5556         struct devlink_health_reporter *reporter;
5557         int err;
5558
5559         reporter = devlink_health_reporter_get_from_info(devlink, info);
5560         if (!reporter)
5561                 return -EINVAL;
5562
5563         if (!reporter->ops->recover &&
5564             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
5565              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
5566                 err = -EOPNOTSUPP;
5567                 goto out;
5568         }
5569         if (!reporter->ops->dump &&
5570             info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
5571                 err = -EOPNOTSUPP;
5572                 goto out;
5573         }
5574
5575         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
5576                 reporter->graceful_period =
5577                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
5578
5579         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
5580                 reporter->auto_recover =
5581                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
5582
5583         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
5584                 reporter->auto_dump =
5585                 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
5586
5587         devlink_health_reporter_put(reporter);
5588         return 0;
5589 out:
5590         devlink_health_reporter_put(reporter);
5591         return err;
5592 }
5593
5594 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
5595                                                        struct genl_info *info)
5596 {
5597         struct devlink *devlink = info->user_ptr[0];
5598         struct devlink_health_reporter *reporter;
5599         int err;
5600
5601         reporter = devlink_health_reporter_get_from_info(devlink, info);
5602         if (!reporter)
5603                 return -EINVAL;
5604
5605         err = devlink_health_reporter_recover(reporter, NULL, info->extack);
5606
5607         devlink_health_reporter_put(reporter);
5608         return err;
5609 }
5610
5611 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
5612                                                         struct genl_info *info)
5613 {
5614         struct devlink *devlink = info->user_ptr[0];
5615         struct devlink_health_reporter *reporter;
5616         struct devlink_fmsg *fmsg;
5617         int err;
5618
5619         reporter = devlink_health_reporter_get_from_info(devlink, info);
5620         if (!reporter)
5621                 return -EINVAL;
5622
5623         if (!reporter->ops->diagnose) {
5624                 devlink_health_reporter_put(reporter);
5625                 return -EOPNOTSUPP;
5626         }
5627
5628         fmsg = devlink_fmsg_alloc();
5629         if (!fmsg) {
5630                 devlink_health_reporter_put(reporter);
5631                 return -ENOMEM;
5632         }
5633
5634         err = devlink_fmsg_obj_nest_start(fmsg);
5635         if (err)
5636                 goto out;
5637
5638         err = reporter->ops->diagnose(reporter, fmsg, info->extack);
5639         if (err)
5640                 goto out;
5641
5642         err = devlink_fmsg_obj_nest_end(fmsg);
5643         if (err)
5644                 goto out;
5645
5646         err = devlink_fmsg_snd(fmsg, info,
5647                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
5648
5649 out:
5650         devlink_fmsg_free(fmsg);
5651         devlink_health_reporter_put(reporter);
5652         return err;
5653 }
5654
5655 static int
5656 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
5657                                                struct netlink_callback *cb)
5658 {
5659         struct devlink_health_reporter *reporter;
5660         u64 start = cb->args[0];
5661         int err;
5662
5663         reporter = devlink_health_reporter_get_from_cb(cb);
5664         if (!reporter)
5665                 return -EINVAL;
5666
5667         if (!reporter->ops->dump) {
5668                 err = -EOPNOTSUPP;
5669                 goto out;
5670         }
5671         mutex_lock(&reporter->dump_lock);
5672         if (!start) {
5673                 err = devlink_health_do_dump(reporter, NULL, cb->extack);
5674                 if (err)
5675                         goto unlock;
5676                 cb->args[1] = reporter->dump_ts;
5677         }
5678         if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
5679                 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
5680                 err = -EAGAIN;
5681                 goto unlock;
5682         }
5683
5684         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
5685                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
5686 unlock:
5687         mutex_unlock(&reporter->dump_lock);
5688 out:
5689         devlink_health_reporter_put(reporter);
5690         return err;
5691 }
5692
5693 static int
5694 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
5695                                                struct genl_info *info)
5696 {
5697         struct devlink *devlink = info->user_ptr[0];
5698         struct devlink_health_reporter *reporter;
5699
5700         reporter = devlink_health_reporter_get_from_info(devlink, info);
5701         if (!reporter)
5702                 return -EINVAL;
5703
5704         if (!reporter->ops->dump) {
5705                 devlink_health_reporter_put(reporter);
5706                 return -EOPNOTSUPP;
5707         }
5708
5709         mutex_lock(&reporter->dump_lock);
5710         devlink_health_dump_clear(reporter);
5711         mutex_unlock(&reporter->dump_lock);
5712         devlink_health_reporter_put(reporter);
5713         return 0;
5714 }
5715
5716 struct devlink_stats {
5717         u64 rx_bytes;
5718         u64 rx_packets;
5719         struct u64_stats_sync syncp;
5720 };
5721
5722 /**
5723  * struct devlink_trap_policer_item - Packet trap policer attributes.
5724  * @policer: Immutable packet trap policer attributes.
5725  * @rate: Rate in packets / sec.
5726  * @burst: Burst size in packets.
5727  * @list: trap_policer_list member.
5728  *
5729  * Describes packet trap policer attributes. Created by devlink during trap
5730  * policer registration.
5731  */
5732 struct devlink_trap_policer_item {
5733         const struct devlink_trap_policer *policer;
5734         u64 rate;
5735         u64 burst;
5736         struct list_head list;
5737 };
5738
5739 /**
5740  * struct devlink_trap_group_item - Packet trap group attributes.
5741  * @group: Immutable packet trap group attributes.
5742  * @policer_item: Associated policer item. Can be NULL.
5743  * @list: trap_group_list member.
5744  * @stats: Trap group statistics.
5745  *
5746  * Describes packet trap group attributes. Created by devlink during trap
5747  * group registration.
5748  */
5749 struct devlink_trap_group_item {
5750         const struct devlink_trap_group *group;
5751         struct devlink_trap_policer_item *policer_item;
5752         struct list_head list;
5753         struct devlink_stats __percpu *stats;
5754 };
5755
5756 /**
5757  * struct devlink_trap_item - Packet trap attributes.
5758  * @trap: Immutable packet trap attributes.
5759  * @group_item: Associated group item.
5760  * @list: trap_list member.
5761  * @action: Trap action.
5762  * @stats: Trap statistics.
5763  * @priv: Driver private information.
5764  *
5765  * Describes both mutable and immutable packet trap attributes. Created by
5766  * devlink during trap registration and used for all trap related operations.
5767  */
5768 struct devlink_trap_item {
5769         const struct devlink_trap *trap;
5770         struct devlink_trap_group_item *group_item;
5771         struct list_head list;
5772         enum devlink_trap_action action;
5773         struct devlink_stats __percpu *stats;
5774         void *priv;
5775 };
5776
5777 static struct devlink_trap_policer_item *
5778 devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
5779 {
5780         struct devlink_trap_policer_item *policer_item;
5781
5782         list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
5783                 if (policer_item->policer->id == id)
5784                         return policer_item;
5785         }
5786
5787         return NULL;
5788 }
5789
5790 static struct devlink_trap_item *
5791 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
5792 {
5793         struct devlink_trap_item *trap_item;
5794
5795         list_for_each_entry(trap_item, &devlink->trap_list, list) {
5796                 if (!strcmp(trap_item->trap->name, name))
5797                         return trap_item;
5798         }
5799
5800         return NULL;
5801 }
5802
5803 static struct devlink_trap_item *
5804 devlink_trap_item_get_from_info(struct devlink *devlink,
5805                                 struct genl_info *info)
5806 {
5807         struct nlattr *attr;
5808
5809         if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
5810                 return NULL;
5811         attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
5812
5813         return devlink_trap_item_lookup(devlink, nla_data(attr));
5814 }
5815
5816 static int
5817 devlink_trap_action_get_from_info(struct genl_info *info,
5818                                   enum devlink_trap_action *p_trap_action)
5819 {
5820         u8 val;
5821
5822         val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
5823         switch (val) {
5824         case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
5825         case DEVLINK_TRAP_ACTION_TRAP:
5826                 *p_trap_action = val;
5827                 break;
5828         default:
5829                 return -EINVAL;
5830         }
5831
5832         return 0;
5833 }
5834
5835 static int devlink_trap_metadata_put(struct sk_buff *msg,
5836                                      const struct devlink_trap *trap)
5837 {
5838         struct nlattr *attr;
5839
5840         attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
5841         if (!attr)
5842                 return -EMSGSIZE;
5843
5844         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
5845             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
5846                 goto nla_put_failure;
5847         if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
5848             nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
5849                 goto nla_put_failure;
5850
5851         nla_nest_end(msg, attr);
5852
5853         return 0;
5854
5855 nla_put_failure:
5856         nla_nest_cancel(msg, attr);
5857         return -EMSGSIZE;
5858 }
5859
5860 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
5861                                     struct devlink_stats *stats)
5862 {
5863         int i;
5864
5865         memset(stats, 0, sizeof(*stats));
5866         for_each_possible_cpu(i) {
5867                 struct devlink_stats *cpu_stats;
5868                 u64 rx_packets, rx_bytes;
5869                 unsigned int start;
5870
5871                 cpu_stats = per_cpu_ptr(trap_stats, i);
5872                 do {
5873                         start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5874                         rx_packets = cpu_stats->rx_packets;
5875                         rx_bytes = cpu_stats->rx_bytes;
5876                 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5877
5878                 stats->rx_packets += rx_packets;
5879                 stats->rx_bytes += rx_bytes;
5880         }
5881 }
5882
5883 static int devlink_trap_stats_put(struct sk_buff *msg,
5884                                   struct devlink_stats __percpu *trap_stats)
5885 {
5886         struct devlink_stats stats;
5887         struct nlattr *attr;
5888
5889         devlink_trap_stats_read(trap_stats, &stats);
5890
5891         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
5892         if (!attr)
5893                 return -EMSGSIZE;
5894
5895         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
5896                               stats.rx_packets, DEVLINK_ATTR_PAD))
5897                 goto nla_put_failure;
5898
5899         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
5900                               stats.rx_bytes, DEVLINK_ATTR_PAD))
5901                 goto nla_put_failure;
5902
5903         nla_nest_end(msg, attr);
5904
5905         return 0;
5906
5907 nla_put_failure:
5908         nla_nest_cancel(msg, attr);
5909         return -EMSGSIZE;
5910 }
5911
5912 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
5913                                 const struct devlink_trap_item *trap_item,
5914                                 enum devlink_command cmd, u32 portid, u32 seq,
5915                                 int flags)
5916 {
5917         struct devlink_trap_group_item *group_item = trap_item->group_item;
5918         void *hdr;
5919         int err;
5920
5921         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5922         if (!hdr)
5923                 return -EMSGSIZE;
5924
5925         if (devlink_nl_put_handle(msg, devlink))
5926                 goto nla_put_failure;
5927
5928         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
5929                            group_item->group->name))
5930                 goto nla_put_failure;
5931
5932         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
5933                 goto nla_put_failure;
5934
5935         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
5936                 goto nla_put_failure;
5937
5938         if (trap_item->trap->generic &&
5939             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
5940                 goto nla_put_failure;
5941
5942         if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
5943                 goto nla_put_failure;
5944
5945         err = devlink_trap_metadata_put(msg, trap_item->trap);
5946         if (err)
5947                 goto nla_put_failure;
5948
5949         err = devlink_trap_stats_put(msg, trap_item->stats);
5950         if (err)
5951                 goto nla_put_failure;
5952
5953         genlmsg_end(msg, hdr);
5954
5955         return 0;
5956
5957 nla_put_failure:
5958         genlmsg_cancel(msg, hdr);
5959         return -EMSGSIZE;
5960 }
5961
5962 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
5963                                         struct genl_info *info)
5964 {
5965         struct netlink_ext_ack *extack = info->extack;
5966         struct devlink *devlink = info->user_ptr[0];
5967         struct devlink_trap_item *trap_item;
5968         struct sk_buff *msg;
5969         int err;
5970
5971         if (list_empty(&devlink->trap_list))
5972                 return -EOPNOTSUPP;
5973
5974         trap_item = devlink_trap_item_get_from_info(devlink, info);
5975         if (!trap_item) {
5976                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
5977                 return -ENOENT;
5978         }
5979
5980         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5981         if (!msg)
5982                 return -ENOMEM;
5983
5984         err = devlink_nl_trap_fill(msg, devlink, trap_item,
5985                                    DEVLINK_CMD_TRAP_NEW, info->snd_portid,
5986                                    info->snd_seq, 0);
5987         if (err)
5988                 goto err_trap_fill;
5989
5990         return genlmsg_reply(msg, info);
5991
5992 err_trap_fill:
5993         nlmsg_free(msg);
5994         return err;
5995 }
5996
5997 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
5998                                           struct netlink_callback *cb)
5999 {
6000         struct devlink_trap_item *trap_item;
6001         struct devlink *devlink;
6002         int start = cb->args[0];
6003         int idx = 0;
6004         int err;
6005
6006         mutex_lock(&devlink_mutex);
6007         list_for_each_entry(devlink, &devlink_list, list) {
6008                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6009                         continue;
6010                 mutex_lock(&devlink->lock);
6011                 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6012                         if (idx < start) {
6013                                 idx++;
6014                                 continue;
6015                         }
6016                         err = devlink_nl_trap_fill(msg, devlink, trap_item,
6017                                                    DEVLINK_CMD_TRAP_NEW,
6018                                                    NETLINK_CB(cb->skb).portid,
6019                                                    cb->nlh->nlmsg_seq,
6020                                                    NLM_F_MULTI);
6021                         if (err) {
6022                                 mutex_unlock(&devlink->lock);
6023                                 goto out;
6024                         }
6025                         idx++;
6026                 }
6027                 mutex_unlock(&devlink->lock);
6028         }
6029 out:
6030         mutex_unlock(&devlink_mutex);
6031
6032         cb->args[0] = idx;
6033         return msg->len;
6034 }
6035
6036 static int __devlink_trap_action_set(struct devlink *devlink,
6037                                      struct devlink_trap_item *trap_item,
6038                                      enum devlink_trap_action trap_action,
6039                                      struct netlink_ext_ack *extack)
6040 {
6041         int err;
6042
6043         if (trap_item->action != trap_action &&
6044             trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
6045                 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
6046                 return 0;
6047         }
6048
6049         err = devlink->ops->trap_action_set(devlink, trap_item->trap,
6050                                             trap_action);
6051         if (err)
6052                 return err;
6053
6054         trap_item->action = trap_action;
6055
6056         return 0;
6057 }
6058
6059 static int devlink_trap_action_set(struct devlink *devlink,
6060                                    struct devlink_trap_item *trap_item,
6061                                    struct genl_info *info)
6062 {
6063         enum devlink_trap_action trap_action;
6064         int err;
6065
6066         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6067                 return 0;
6068
6069         err = devlink_trap_action_get_from_info(info, &trap_action);
6070         if (err) {
6071                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6072                 return -EINVAL;
6073         }
6074
6075         return __devlink_trap_action_set(devlink, trap_item, trap_action,
6076                                          info->extack);
6077 }
6078
6079 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
6080                                         struct genl_info *info)
6081 {
6082         struct netlink_ext_ack *extack = info->extack;
6083         struct devlink *devlink = info->user_ptr[0];
6084         struct devlink_trap_item *trap_item;
6085         int err;
6086
6087         if (list_empty(&devlink->trap_list))
6088                 return -EOPNOTSUPP;
6089
6090         trap_item = devlink_trap_item_get_from_info(devlink, info);
6091         if (!trap_item) {
6092                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6093                 return -ENOENT;
6094         }
6095
6096         err = devlink_trap_action_set(devlink, trap_item, info);
6097         if (err)
6098                 return err;
6099
6100         return 0;
6101 }
6102
6103 static struct devlink_trap_group_item *
6104 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
6105 {
6106         struct devlink_trap_group_item *group_item;
6107
6108         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6109                 if (!strcmp(group_item->group->name, name))
6110                         return group_item;
6111         }
6112
6113         return NULL;
6114 }
6115
6116 static struct devlink_trap_group_item *
6117 devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
6118 {
6119         struct devlink_trap_group_item *group_item;
6120
6121         list_for_each_entry(group_item, &devlink->trap_group_list, list) {
6122                 if (group_item->group->id == id)
6123                         return group_item;
6124         }
6125
6126         return NULL;
6127 }
6128
6129 static struct devlink_trap_group_item *
6130 devlink_trap_group_item_get_from_info(struct devlink *devlink,
6131                                       struct genl_info *info)
6132 {
6133         char *name;
6134
6135         if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
6136                 return NULL;
6137         name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
6138
6139         return devlink_trap_group_item_lookup(devlink, name);
6140 }
6141
6142 static int
6143 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
6144                            const struct devlink_trap_group_item *group_item,
6145                            enum devlink_command cmd, u32 portid, u32 seq,
6146                            int flags)
6147 {
6148         void *hdr;
6149         int err;
6150
6151         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6152         if (!hdr)
6153                 return -EMSGSIZE;
6154
6155         if (devlink_nl_put_handle(msg, devlink))
6156                 goto nla_put_failure;
6157
6158         if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
6159                            group_item->group->name))
6160                 goto nla_put_failure;
6161
6162         if (group_item->group->generic &&
6163             nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
6164                 goto nla_put_failure;
6165
6166         if (group_item->policer_item &&
6167             nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6168                         group_item->policer_item->policer->id))
6169                 goto nla_put_failure;
6170
6171         err = devlink_trap_stats_put(msg, group_item->stats);
6172         if (err)
6173                 goto nla_put_failure;
6174
6175         genlmsg_end(msg, hdr);
6176
6177         return 0;
6178
6179 nla_put_failure:
6180         genlmsg_cancel(msg, hdr);
6181         return -EMSGSIZE;
6182 }
6183
6184 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
6185                                               struct genl_info *info)
6186 {
6187         struct netlink_ext_ack *extack = info->extack;
6188         struct devlink *devlink = info->user_ptr[0];
6189         struct devlink_trap_group_item *group_item;
6190         struct sk_buff *msg;
6191         int err;
6192
6193         if (list_empty(&devlink->trap_group_list))
6194                 return -EOPNOTSUPP;
6195
6196         group_item = devlink_trap_group_item_get_from_info(devlink, info);
6197         if (!group_item) {
6198                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6199                 return -ENOENT;
6200         }
6201
6202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6203         if (!msg)
6204                 return -ENOMEM;
6205
6206         err = devlink_nl_trap_group_fill(msg, devlink, group_item,
6207                                          DEVLINK_CMD_TRAP_GROUP_NEW,
6208                                          info->snd_portid, info->snd_seq, 0);
6209         if (err)
6210                 goto err_trap_group_fill;
6211
6212         return genlmsg_reply(msg, info);
6213
6214 err_trap_group_fill:
6215         nlmsg_free(msg);
6216         return err;
6217 }
6218
6219 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
6220                                                 struct netlink_callback *cb)
6221 {
6222         enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
6223         struct devlink_trap_group_item *group_item;
6224         u32 portid = NETLINK_CB(cb->skb).portid;
6225         struct devlink *devlink;
6226         int start = cb->args[0];
6227         int idx = 0;
6228         int err;
6229
6230         mutex_lock(&devlink_mutex);
6231         list_for_each_entry(devlink, &devlink_list, list) {
6232                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6233                         continue;
6234                 mutex_lock(&devlink->lock);
6235                 list_for_each_entry(group_item, &devlink->trap_group_list,
6236                                     list) {
6237                         if (idx < start) {
6238                                 idx++;
6239                                 continue;
6240                         }
6241                         err = devlink_nl_trap_group_fill(msg, devlink,
6242                                                          group_item, cmd,
6243                                                          portid,
6244                                                          cb->nlh->nlmsg_seq,
6245                                                          NLM_F_MULTI);
6246                         if (err) {
6247                                 mutex_unlock(&devlink->lock);
6248                                 goto out;
6249                         }
6250                         idx++;
6251                 }
6252                 mutex_unlock(&devlink->lock);
6253         }
6254 out:
6255         mutex_unlock(&devlink_mutex);
6256
6257         cb->args[0] = idx;
6258         return msg->len;
6259 }
6260
6261 static int
6262 __devlink_trap_group_action_set(struct devlink *devlink,
6263                                 struct devlink_trap_group_item *group_item,
6264                                 enum devlink_trap_action trap_action,
6265                                 struct netlink_ext_ack *extack)
6266 {
6267         const char *group_name = group_item->group->name;
6268         struct devlink_trap_item *trap_item;
6269         int err;
6270
6271         list_for_each_entry(trap_item, &devlink->trap_list, list) {
6272                 if (strcmp(trap_item->group_item->group->name, group_name))
6273                         continue;
6274                 err = __devlink_trap_action_set(devlink, trap_item,
6275                                                 trap_action, extack);
6276                 if (err)
6277                         return err;
6278         }
6279
6280         return 0;
6281 }
6282
6283 static int
6284 devlink_trap_group_action_set(struct devlink *devlink,
6285                               struct devlink_trap_group_item *group_item,
6286                               struct genl_info *info, bool *p_modified)
6287 {
6288         enum devlink_trap_action trap_action;
6289         int err;
6290
6291         if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6292                 return 0;
6293
6294         err = devlink_trap_action_get_from_info(info, &trap_action);
6295         if (err) {
6296                 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6297                 return -EINVAL;
6298         }
6299
6300         err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
6301                                               info->extack);
6302         if (err)
6303                 return err;
6304
6305         *p_modified = true;
6306
6307         return 0;
6308 }
6309
6310 static int devlink_trap_group_set(struct devlink *devlink,
6311                                   struct devlink_trap_group_item *group_item,
6312                                   struct genl_info *info)
6313 {
6314         struct devlink_trap_policer_item *policer_item;
6315         struct netlink_ext_ack *extack = info->extack;
6316         const struct devlink_trap_policer *policer;
6317         struct nlattr **attrs = info->attrs;
6318         int err;
6319
6320         if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6321                 return 0;
6322
6323         if (!devlink->ops->trap_group_set)
6324                 return -EOPNOTSUPP;
6325
6326         policer_item = group_item->policer_item;
6327         if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) {
6328                 u32 policer_id;
6329
6330                 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6331                 policer_item = devlink_trap_policer_item_lookup(devlink,
6332                                                                 policer_id);
6333                 if (policer_id && !policer_item) {
6334                         NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6335                         return -ENOENT;
6336                 }
6337         }
6338         policer = policer_item ? policer_item->policer : NULL;
6339
6340         err = devlink->ops->trap_group_set(devlink, group_item->group, policer);
6341         if (err)
6342                 return err;
6343
6344         group_item->policer_item = policer_item;
6345
6346         return 0;
6347 }
6348
6349 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
6350                                               struct genl_info *info)
6351 {
6352         struct netlink_ext_ack *extack = info->extack;
6353         struct devlink *devlink = info->user_ptr[0];
6354         struct devlink_trap_group_item *group_item;
6355         bool modified = false;
6356         int err;
6357
6358         if (list_empty(&devlink->trap_group_list))
6359                 return -EOPNOTSUPP;
6360
6361         group_item = devlink_trap_group_item_get_from_info(devlink, info);
6362         if (!group_item) {
6363                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
6364                 return -ENOENT;
6365         }
6366
6367         err = devlink_trap_group_action_set(devlink, group_item, info,
6368                                             &modified);
6369         if (err)
6370                 return err;
6371
6372         err = devlink_trap_group_set(devlink, group_item, info);
6373         if (err)
6374                 goto err_trap_group_set;
6375
6376         return 0;
6377
6378 err_trap_group_set:
6379         if (modified)
6380                 NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
6381         return err;
6382 }
6383
6384 static struct devlink_trap_policer_item *
6385 devlink_trap_policer_item_get_from_info(struct devlink *devlink,
6386                                         struct genl_info *info)
6387 {
6388         u32 id;
6389
6390         if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
6391                 return NULL;
6392         id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
6393
6394         return devlink_trap_policer_item_lookup(devlink, id);
6395 }
6396
6397 static int
6398 devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
6399                                const struct devlink_trap_policer *policer)
6400 {
6401         struct nlattr *attr;
6402         u64 drops;
6403         int err;
6404
6405         if (!devlink->ops->trap_policer_counter_get)
6406                 return 0;
6407
6408         err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
6409         if (err)
6410                 return err;
6411
6412         attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
6413         if (!attr)
6414                 return -EMSGSIZE;
6415
6416         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
6417                               DEVLINK_ATTR_PAD))
6418                 goto nla_put_failure;
6419
6420         nla_nest_end(msg, attr);
6421
6422         return 0;
6423
6424 nla_put_failure:
6425         nla_nest_cancel(msg, attr);
6426         return -EMSGSIZE;
6427 }
6428
6429 static int
6430 devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
6431                              const struct devlink_trap_policer_item *policer_item,
6432                              enum devlink_command cmd, u32 portid, u32 seq,
6433                              int flags)
6434 {
6435         void *hdr;
6436         int err;
6437
6438         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6439         if (!hdr)
6440                 return -EMSGSIZE;
6441
6442         if (devlink_nl_put_handle(msg, devlink))
6443                 goto nla_put_failure;
6444
6445         if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
6446                         policer_item->policer->id))
6447                 goto nla_put_failure;
6448
6449         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
6450                               policer_item->rate, DEVLINK_ATTR_PAD))
6451                 goto nla_put_failure;
6452
6453         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
6454                               policer_item->burst, DEVLINK_ATTR_PAD))
6455                 goto nla_put_failure;
6456
6457         err = devlink_trap_policer_stats_put(msg, devlink,
6458                                              policer_item->policer);
6459         if (err)
6460                 goto nla_put_failure;
6461
6462         genlmsg_end(msg, hdr);
6463
6464         return 0;
6465
6466 nla_put_failure:
6467         genlmsg_cancel(msg, hdr);
6468         return -EMSGSIZE;
6469 }
6470
6471 static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
6472                                                 struct genl_info *info)
6473 {
6474         struct devlink_trap_policer_item *policer_item;
6475         struct netlink_ext_ack *extack = info->extack;
6476         struct devlink *devlink = info->user_ptr[0];
6477         struct sk_buff *msg;
6478         int err;
6479
6480         if (list_empty(&devlink->trap_policer_list))
6481                 return -EOPNOTSUPP;
6482
6483         policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6484         if (!policer_item) {
6485                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6486                 return -ENOENT;
6487         }
6488
6489         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6490         if (!msg)
6491                 return -ENOMEM;
6492
6493         err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
6494                                            DEVLINK_CMD_TRAP_POLICER_NEW,
6495                                            info->snd_portid, info->snd_seq, 0);
6496         if (err)
6497                 goto err_trap_policer_fill;
6498
6499         return genlmsg_reply(msg, info);
6500
6501 err_trap_policer_fill:
6502         nlmsg_free(msg);
6503         return err;
6504 }
6505
6506 static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
6507                                                   struct netlink_callback *cb)
6508 {
6509         enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
6510         struct devlink_trap_policer_item *policer_item;
6511         u32 portid = NETLINK_CB(cb->skb).portid;
6512         struct devlink *devlink;
6513         int start = cb->args[0];
6514         int idx = 0;
6515         int err;
6516
6517         mutex_lock(&devlink_mutex);
6518         list_for_each_entry(devlink, &devlink_list, list) {
6519                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6520                         continue;
6521                 mutex_lock(&devlink->lock);
6522                 list_for_each_entry(policer_item, &devlink->trap_policer_list,
6523                                     list) {
6524                         if (idx < start) {
6525                                 idx++;
6526                                 continue;
6527                         }
6528                         err = devlink_nl_trap_policer_fill(msg, devlink,
6529                                                            policer_item, cmd,
6530                                                            portid,
6531                                                            cb->nlh->nlmsg_seq,
6532                                                            NLM_F_MULTI);
6533                         if (err) {
6534                                 mutex_unlock(&devlink->lock);
6535                                 goto out;
6536                         }
6537                         idx++;
6538                 }
6539                 mutex_unlock(&devlink->lock);
6540         }
6541 out:
6542         mutex_unlock(&devlink_mutex);
6543
6544         cb->args[0] = idx;
6545         return msg->len;
6546 }
6547
6548 static int
6549 devlink_trap_policer_set(struct devlink *devlink,
6550                          struct devlink_trap_policer_item *policer_item,
6551                          struct genl_info *info)
6552 {
6553         struct netlink_ext_ack *extack = info->extack;
6554         struct nlattr **attrs = info->attrs;
6555         u64 rate, burst;
6556         int err;
6557
6558         rate = policer_item->rate;
6559         burst = policer_item->burst;
6560
6561         if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
6562                 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
6563
6564         if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
6565                 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
6566
6567         if (rate < policer_item->policer->min_rate) {
6568                 NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
6569                 return -EINVAL;
6570         }
6571
6572         if (rate > policer_item->policer->max_rate) {
6573                 NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
6574                 return -EINVAL;
6575         }
6576
6577         if (burst < policer_item->policer->min_burst) {
6578                 NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
6579                 return -EINVAL;
6580         }
6581
6582         if (burst > policer_item->policer->max_burst) {
6583                 NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
6584                 return -EINVAL;
6585         }
6586
6587         err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
6588                                              rate, burst, info->extack);
6589         if (err)
6590                 return err;
6591
6592         policer_item->rate = rate;
6593         policer_item->burst = burst;
6594
6595         return 0;
6596 }
6597
6598 static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
6599                                                 struct genl_info *info)
6600 {
6601         struct devlink_trap_policer_item *policer_item;
6602         struct netlink_ext_ack *extack = info->extack;
6603         struct devlink *devlink = info->user_ptr[0];
6604
6605         if (list_empty(&devlink->trap_policer_list))
6606                 return -EOPNOTSUPP;
6607
6608         if (!devlink->ops->trap_policer_set)
6609                 return -EOPNOTSUPP;
6610
6611         policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
6612         if (!policer_item) {
6613                 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
6614                 return -ENOENT;
6615         }
6616
6617         return devlink_trap_policer_set(devlink, policer_item, info);
6618 }
6619
6620 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
6621         [DEVLINK_ATTR_UNSPEC] = { .strict_start_type =
6622                 DEVLINK_ATTR_TRAP_POLICER_ID },
6623         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
6624         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
6625         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
6626         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
6627         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
6628         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
6629         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
6630         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
6631         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
6632         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
6633         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
6634         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
6635         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
6636         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
6637         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
6638         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
6639         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
6640         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
6641         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
6642         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
6643         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
6644         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
6645         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
6646         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
6647         [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
6648         [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
6649         [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
6650         [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
6651         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
6652         [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
6653         [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
6654         [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
6655         [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
6656         [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
6657         [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
6658         [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
6659         [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
6660         [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },
6661         [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
6662         [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
6663         [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
6664 };
6665
6666 static const struct genl_ops devlink_nl_ops[] = {
6667         {
6668                 .cmd = DEVLINK_CMD_GET,
6669                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6670                 .doit = devlink_nl_cmd_get_doit,
6671                 .dumpit = devlink_nl_cmd_get_dumpit,
6672                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6673                 /* can be retrieved by unprivileged users */
6674         },
6675         {
6676                 .cmd = DEVLINK_CMD_PORT_GET,
6677                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6678                 .doit = devlink_nl_cmd_port_get_doit,
6679                 .dumpit = devlink_nl_cmd_port_get_dumpit,
6680                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6681                 /* can be retrieved by unprivileged users */
6682         },
6683         {
6684                 .cmd = DEVLINK_CMD_PORT_SET,
6685                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6686                 .doit = devlink_nl_cmd_port_set_doit,
6687                 .flags = GENL_ADMIN_PERM,
6688                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6689         },
6690         {
6691                 .cmd = DEVLINK_CMD_PORT_SPLIT,
6692                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6693                 .doit = devlink_nl_cmd_port_split_doit,
6694                 .flags = GENL_ADMIN_PERM,
6695                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6696                                   DEVLINK_NL_FLAG_NO_LOCK,
6697         },
6698         {
6699                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
6700                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6701                 .doit = devlink_nl_cmd_port_unsplit_doit,
6702                 .flags = GENL_ADMIN_PERM,
6703                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6704                                   DEVLINK_NL_FLAG_NO_LOCK,
6705         },
6706         {
6707                 .cmd = DEVLINK_CMD_SB_GET,
6708                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6709                 .doit = devlink_nl_cmd_sb_get_doit,
6710                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
6711                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6712                                   DEVLINK_NL_FLAG_NEED_SB,
6713                 /* can be retrieved by unprivileged users */
6714         },
6715         {
6716                 .cmd = DEVLINK_CMD_SB_POOL_GET,
6717                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6718                 .doit = devlink_nl_cmd_sb_pool_get_doit,
6719                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
6720                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6721                                   DEVLINK_NL_FLAG_NEED_SB,
6722                 /* can be retrieved by unprivileged users */
6723         },
6724         {
6725                 .cmd = DEVLINK_CMD_SB_POOL_SET,
6726                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6727                 .doit = devlink_nl_cmd_sb_pool_set_doit,
6728                 .flags = GENL_ADMIN_PERM,
6729                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6730                                   DEVLINK_NL_FLAG_NEED_SB,
6731         },
6732         {
6733                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
6734                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6735                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
6736                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
6737                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6738                                   DEVLINK_NL_FLAG_NEED_SB,
6739                 /* can be retrieved by unprivileged users */
6740         },
6741         {
6742                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
6743                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6744                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
6745                 .flags = GENL_ADMIN_PERM,
6746                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6747                                   DEVLINK_NL_FLAG_NEED_SB,
6748         },
6749         {
6750                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
6751                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6752                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
6753                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
6754                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6755                                   DEVLINK_NL_FLAG_NEED_SB,
6756                 /* can be retrieved by unprivileged users */
6757         },
6758         {
6759                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
6760                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6761                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
6762                 .flags = GENL_ADMIN_PERM,
6763                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
6764                                   DEVLINK_NL_FLAG_NEED_SB,
6765         },
6766         {
6767                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
6768                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6769                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
6770                 .flags = GENL_ADMIN_PERM,
6771                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6772                                   DEVLINK_NL_FLAG_NEED_SB,
6773         },
6774         {
6775                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
6776                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6777                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
6778                 .flags = GENL_ADMIN_PERM,
6779                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6780                                   DEVLINK_NL_FLAG_NEED_SB,
6781         },
6782         {
6783                 .cmd = DEVLINK_CMD_ESWITCH_GET,
6784                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6785                 .doit = devlink_nl_cmd_eswitch_get_doit,
6786                 .flags = GENL_ADMIN_PERM,
6787                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6788                                   DEVLINK_NL_FLAG_NO_LOCK,
6789         },
6790         {
6791                 .cmd = DEVLINK_CMD_ESWITCH_SET,
6792                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6793                 .doit = devlink_nl_cmd_eswitch_set_doit,
6794                 .flags = GENL_ADMIN_PERM,
6795                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6796                                   DEVLINK_NL_FLAG_NO_LOCK,
6797         },
6798         {
6799                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
6800                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6801                 .doit = devlink_nl_cmd_dpipe_table_get,
6802                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6803                 /* can be retrieved by unprivileged users */
6804         },
6805         {
6806                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
6807                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6808                 .doit = devlink_nl_cmd_dpipe_entries_get,
6809                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6810                 /* can be retrieved by unprivileged users */
6811         },
6812         {
6813                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
6814                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6815                 .doit = devlink_nl_cmd_dpipe_headers_get,
6816                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6817                 /* can be retrieved by unprivileged users */
6818         },
6819         {
6820                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
6821                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6822                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
6823                 .flags = GENL_ADMIN_PERM,
6824                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6825         },
6826         {
6827                 .cmd = DEVLINK_CMD_RESOURCE_SET,
6828                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6829                 .doit = devlink_nl_cmd_resource_set,
6830                 .flags = GENL_ADMIN_PERM,
6831                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6832         },
6833         {
6834                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
6835                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6836                 .doit = devlink_nl_cmd_resource_dump,
6837                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6838                 /* can be retrieved by unprivileged users */
6839         },
6840         {
6841                 .cmd = DEVLINK_CMD_RELOAD,
6842                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6843                 .doit = devlink_nl_cmd_reload,
6844                 .flags = GENL_ADMIN_PERM,
6845                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6846                                   DEVLINK_NL_FLAG_NO_LOCK,
6847         },
6848         {
6849                 .cmd = DEVLINK_CMD_PARAM_GET,
6850                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6851                 .doit = devlink_nl_cmd_param_get_doit,
6852                 .dumpit = devlink_nl_cmd_param_get_dumpit,
6853                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6854                 /* can be retrieved by unprivileged users */
6855         },
6856         {
6857                 .cmd = DEVLINK_CMD_PARAM_SET,
6858                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6859                 .doit = devlink_nl_cmd_param_set_doit,
6860                 .flags = GENL_ADMIN_PERM,
6861                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6862         },
6863         {
6864                 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
6865                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6866                 .doit = devlink_nl_cmd_port_param_get_doit,
6867                 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
6868                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6869                 /* can be retrieved by unprivileged users */
6870         },
6871         {
6872                 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
6873                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6874                 .doit = devlink_nl_cmd_port_param_set_doit,
6875                 .flags = GENL_ADMIN_PERM,
6876                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
6877         },
6878         {
6879                 .cmd = DEVLINK_CMD_REGION_GET,
6880                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6881                 .doit = devlink_nl_cmd_region_get_doit,
6882                 .dumpit = devlink_nl_cmd_region_get_dumpit,
6883                 .flags = GENL_ADMIN_PERM,
6884                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6885         },
6886         {
6887                 .cmd = DEVLINK_CMD_REGION_NEW,
6888                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6889                 .doit = devlink_nl_cmd_region_new,
6890                 .flags = GENL_ADMIN_PERM,
6891                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6892         },
6893         {
6894                 .cmd = DEVLINK_CMD_REGION_DEL,
6895                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6896                 .doit = devlink_nl_cmd_region_del,
6897                 .flags = GENL_ADMIN_PERM,
6898                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6899         },
6900         {
6901                 .cmd = DEVLINK_CMD_REGION_READ,
6902                 .validate = GENL_DONT_VALIDATE_STRICT |
6903                             GENL_DONT_VALIDATE_DUMP_STRICT,
6904                 .dumpit = devlink_nl_cmd_region_read_dumpit,
6905                 .flags = GENL_ADMIN_PERM,
6906                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6907         },
6908         {
6909                 .cmd = DEVLINK_CMD_INFO_GET,
6910                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6911                 .doit = devlink_nl_cmd_info_get_doit,
6912                 .dumpit = devlink_nl_cmd_info_get_dumpit,
6913                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6914                 /* can be retrieved by unprivileged users */
6915         },
6916         {
6917                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
6918                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6919                 .doit = devlink_nl_cmd_health_reporter_get_doit,
6920                 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
6921                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6922                                   DEVLINK_NL_FLAG_NO_LOCK,
6923                 /* can be retrieved by unprivileged users */
6924         },
6925         {
6926                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
6927                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6928                 .doit = devlink_nl_cmd_health_reporter_set_doit,
6929                 .flags = GENL_ADMIN_PERM,
6930                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6931                                   DEVLINK_NL_FLAG_NO_LOCK,
6932         },
6933         {
6934                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
6935                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6936                 .doit = devlink_nl_cmd_health_reporter_recover_doit,
6937                 .flags = GENL_ADMIN_PERM,
6938                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6939                                   DEVLINK_NL_FLAG_NO_LOCK,
6940         },
6941         {
6942                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
6943                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6944                 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
6945                 .flags = GENL_ADMIN_PERM,
6946                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6947                                   DEVLINK_NL_FLAG_NO_LOCK,
6948         },
6949         {
6950                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
6951                 .validate = GENL_DONT_VALIDATE_STRICT |
6952                             GENL_DONT_VALIDATE_DUMP_STRICT,
6953                 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
6954                 .flags = GENL_ADMIN_PERM,
6955                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6956                                   DEVLINK_NL_FLAG_NO_LOCK,
6957         },
6958         {
6959                 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
6960                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6961                 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
6962                 .flags = GENL_ADMIN_PERM,
6963                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
6964                                   DEVLINK_NL_FLAG_NO_LOCK,
6965         },
6966         {
6967                 .cmd = DEVLINK_CMD_FLASH_UPDATE,
6968                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
6969                 .doit = devlink_nl_cmd_flash_update,
6970                 .flags = GENL_ADMIN_PERM,
6971                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6972         },
6973         {
6974                 .cmd = DEVLINK_CMD_TRAP_GET,
6975                 .doit = devlink_nl_cmd_trap_get_doit,
6976                 .dumpit = devlink_nl_cmd_trap_get_dumpit,
6977                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6978                 /* can be retrieved by unprivileged users */
6979         },
6980         {
6981                 .cmd = DEVLINK_CMD_TRAP_SET,
6982                 .doit = devlink_nl_cmd_trap_set_doit,
6983                 .flags = GENL_ADMIN_PERM,
6984                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6985         },
6986         {
6987                 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
6988                 .doit = devlink_nl_cmd_trap_group_get_doit,
6989                 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
6990                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6991                 /* can be retrieved by unprivileged users */
6992         },
6993         {
6994                 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
6995                 .doit = devlink_nl_cmd_trap_group_set_doit,
6996                 .flags = GENL_ADMIN_PERM,
6997                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
6998         },
6999         {
7000                 .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
7001                 .doit = devlink_nl_cmd_trap_policer_get_doit,
7002                 .dumpit = devlink_nl_cmd_trap_policer_get_dumpit,
7003                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7004                 /* can be retrieved by unprivileged users */
7005         },
7006         {
7007                 .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
7008                 .doit = devlink_nl_cmd_trap_policer_set_doit,
7009                 .flags = GENL_ADMIN_PERM,
7010                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
7011         },
7012 };
7013
7014 static struct genl_family devlink_nl_family __ro_after_init = {
7015         .name           = DEVLINK_GENL_NAME,
7016         .version        = DEVLINK_GENL_VERSION,
7017         .maxattr        = DEVLINK_ATTR_MAX,
7018         .policy = devlink_nl_policy,
7019         .netnsok        = true,
7020         .pre_doit       = devlink_nl_pre_doit,
7021         .post_doit      = devlink_nl_post_doit,
7022         .module         = THIS_MODULE,
7023         .ops            = devlink_nl_ops,
7024         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
7025         .mcgrps         = devlink_nl_mcgrps,
7026         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
7027 };
7028
7029 /**
7030  *      devlink_alloc - Allocate new devlink instance resources
7031  *
7032  *      @ops: ops
7033  *      @priv_size: size of user private data
7034  *
7035  *      Allocate new devlink instance resources, including devlink index
7036  *      and name.
7037  */
7038 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
7039 {
7040         struct devlink *devlink;
7041
7042         if (WARN_ON(!ops))
7043                 return NULL;
7044
7045         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
7046         if (!devlink)
7047                 return NULL;
7048         devlink->ops = ops;
7049         xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
7050         __devlink_net_set(devlink, &init_net);
7051         INIT_LIST_HEAD(&devlink->port_list);
7052         INIT_LIST_HEAD(&devlink->sb_list);
7053         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
7054         INIT_LIST_HEAD(&devlink->resource_list);
7055         INIT_LIST_HEAD(&devlink->param_list);
7056         INIT_LIST_HEAD(&devlink->region_list);
7057         INIT_LIST_HEAD(&devlink->reporter_list);
7058         INIT_LIST_HEAD(&devlink->trap_list);
7059         INIT_LIST_HEAD(&devlink->trap_group_list);
7060         INIT_LIST_HEAD(&devlink->trap_policer_list);
7061         mutex_init(&devlink->lock);
7062         mutex_init(&devlink->reporters_lock);
7063         return devlink;
7064 }
7065 EXPORT_SYMBOL_GPL(devlink_alloc);
7066
7067 /**
7068  *      devlink_register - Register devlink instance
7069  *
7070  *      @devlink: devlink
7071  *      @dev: parent device
7072  */
7073 int devlink_register(struct devlink *devlink, struct device *dev)
7074 {
7075         mutex_lock(&devlink_mutex);
7076         devlink->dev = dev;
7077         devlink->registered = true;
7078         list_add_tail(&devlink->list, &devlink_list);
7079         devlink_notify(devlink, DEVLINK_CMD_NEW);
7080         mutex_unlock(&devlink_mutex);
7081         return 0;
7082 }
7083 EXPORT_SYMBOL_GPL(devlink_register);
7084
7085 /**
7086  *      devlink_unregister - Unregister devlink instance
7087  *
7088  *      @devlink: devlink
7089  */
7090 void devlink_unregister(struct devlink *devlink)
7091 {
7092         mutex_lock(&devlink_mutex);
7093         WARN_ON(devlink_reload_supported(devlink) &&
7094                 devlink->reload_enabled);
7095         devlink_notify(devlink, DEVLINK_CMD_DEL);
7096         list_del(&devlink->list);
7097         mutex_unlock(&devlink_mutex);
7098 }
7099 EXPORT_SYMBOL_GPL(devlink_unregister);
7100
7101 /**
7102  *      devlink_reload_enable - Enable reload of devlink instance
7103  *
7104  *      @devlink: devlink
7105  *
7106  *      Should be called at end of device initialization
7107  *      process when reload operation is supported.
7108  */
7109 void devlink_reload_enable(struct devlink *devlink)
7110 {
7111         mutex_lock(&devlink_mutex);
7112         devlink->reload_enabled = true;
7113         mutex_unlock(&devlink_mutex);
7114 }
7115 EXPORT_SYMBOL_GPL(devlink_reload_enable);
7116
7117 /**
7118  *      devlink_reload_disable - Disable reload of devlink instance
7119  *
7120  *      @devlink: devlink
7121  *
7122  *      Should be called at the beginning of device cleanup
7123  *      process when reload operation is supported.
7124  */
7125 void devlink_reload_disable(struct devlink *devlink)
7126 {
7127         mutex_lock(&devlink_mutex);
7128         /* Mutex is taken which ensures that no reload operation is in
7129          * progress while setting up forbidded flag.
7130          */
7131         devlink->reload_enabled = false;
7132         mutex_unlock(&devlink_mutex);
7133 }
7134 EXPORT_SYMBOL_GPL(devlink_reload_disable);
7135
7136 /**
7137  *      devlink_free - Free devlink instance resources
7138  *
7139  *      @devlink: devlink
7140  */
7141 void devlink_free(struct devlink *devlink)
7142 {
7143         mutex_destroy(&devlink->reporters_lock);
7144         mutex_destroy(&devlink->lock);
7145         WARN_ON(!list_empty(&devlink->trap_policer_list));
7146         WARN_ON(!list_empty(&devlink->trap_group_list));
7147         WARN_ON(!list_empty(&devlink->trap_list));
7148         WARN_ON(!list_empty(&devlink->reporter_list));
7149         WARN_ON(!list_empty(&devlink->region_list));
7150         WARN_ON(!list_empty(&devlink->param_list));
7151         WARN_ON(!list_empty(&devlink->resource_list));
7152         WARN_ON(!list_empty(&devlink->dpipe_table_list));
7153         WARN_ON(!list_empty(&devlink->sb_list));
7154         WARN_ON(!list_empty(&devlink->port_list));
7155
7156         xa_destroy(&devlink->snapshot_ids);
7157
7158         kfree(devlink);
7159 }
7160 EXPORT_SYMBOL_GPL(devlink_free);
7161
7162 static void devlink_port_type_warn(struct work_struct *work)
7163 {
7164         WARN(true, "Type was not set for devlink port.");
7165 }
7166
7167 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
7168 {
7169         /* Ignore CPU and DSA flavours. */
7170         return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
7171                devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
7172 }
7173
7174 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
7175
7176 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
7177 {
7178         if (!devlink_port_type_should_warn(devlink_port))
7179                 return;
7180         /* Schedule a work to WARN in case driver does not set port
7181          * type within timeout.
7182          */
7183         schedule_delayed_work(&devlink_port->type_warn_dw,
7184                               DEVLINK_PORT_TYPE_WARN_TIMEOUT);
7185 }
7186
7187 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
7188 {
7189         if (!devlink_port_type_should_warn(devlink_port))
7190                 return;
7191         cancel_delayed_work_sync(&devlink_port->type_warn_dw);
7192 }
7193
7194 /**
7195  *      devlink_port_register - Register devlink port
7196  *
7197  *      @devlink: devlink
7198  *      @devlink_port: devlink port
7199  *      @port_index: driver-specific numerical identifier of the port
7200  *
7201  *      Register devlink port with provided port index. User can use
7202  *      any indexing, even hw-related one. devlink_port structure
7203  *      is convenient to be embedded inside user driver private structure.
7204  *      Note that the caller should take care of zeroing the devlink_port
7205  *      structure.
7206  */
7207 int devlink_port_register(struct devlink *devlink,
7208                           struct devlink_port *devlink_port,
7209                           unsigned int port_index)
7210 {
7211         mutex_lock(&devlink->lock);
7212         if (devlink_port_index_exists(devlink, port_index)) {
7213                 mutex_unlock(&devlink->lock);
7214                 return -EEXIST;
7215         }
7216         devlink_port->devlink = devlink;
7217         devlink_port->index = port_index;
7218         devlink_port->registered = true;
7219         spin_lock_init(&devlink_port->type_lock);
7220         list_add_tail(&devlink_port->list, &devlink->port_list);
7221         INIT_LIST_HEAD(&devlink_port->param_list);
7222         mutex_unlock(&devlink->lock);
7223         INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
7224         devlink_port_type_warn_schedule(devlink_port);
7225         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7226         return 0;
7227 }
7228 EXPORT_SYMBOL_GPL(devlink_port_register);
7229
7230 /**
7231  *      devlink_port_unregister - Unregister devlink port
7232  *
7233  *      @devlink_port: devlink port
7234  */
7235 void devlink_port_unregister(struct devlink_port *devlink_port)
7236 {
7237         struct devlink *devlink = devlink_port->devlink;
7238
7239         devlink_port_type_warn_cancel(devlink_port);
7240         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
7241         mutex_lock(&devlink->lock);
7242         list_del(&devlink_port->list);
7243         mutex_unlock(&devlink->lock);
7244 }
7245 EXPORT_SYMBOL_GPL(devlink_port_unregister);
7246
7247 static void __devlink_port_type_set(struct devlink_port *devlink_port,
7248                                     enum devlink_port_type type,
7249                                     void *type_dev)
7250 {
7251         if (WARN_ON(!devlink_port->registered))
7252                 return;
7253         devlink_port_type_warn_cancel(devlink_port);
7254         spin_lock_bh(&devlink_port->type_lock);
7255         devlink_port->type = type;
7256         devlink_port->type_dev = type_dev;
7257         spin_unlock_bh(&devlink_port->type_lock);
7258         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
7259 }
7260
7261 /**
7262  *      devlink_port_type_eth_set - Set port type to Ethernet
7263  *
7264  *      @devlink_port: devlink port
7265  *      @netdev: related netdevice
7266  */
7267 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
7268                                struct net_device *netdev)
7269 {
7270         const struct net_device_ops *ops = netdev->netdev_ops;
7271
7272         /* If driver registers devlink port, it should set devlink port
7273          * attributes accordingly so the compat functions are called
7274          * and the original ops are not used.
7275          */
7276         if (ops->ndo_get_phys_port_name) {
7277                 /* Some drivers use the same set of ndos for netdevs
7278                  * that have devlink_port registered and also for
7279                  * those who don't. Make sure that ndo_get_phys_port_name
7280                  * returns -EOPNOTSUPP here in case it is defined.
7281                  * Warn if not.
7282                  */
7283                 char name[IFNAMSIZ];
7284                 int err;
7285
7286                 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
7287                 WARN_ON(err != -EOPNOTSUPP);
7288         }
7289         if (ops->ndo_get_port_parent_id) {
7290                 /* Some drivers use the same set of ndos for netdevs
7291                  * that have devlink_port registered and also for
7292                  * those who don't. Make sure that ndo_get_port_parent_id
7293                  * returns -EOPNOTSUPP here in case it is defined.
7294                  * Warn if not.
7295                  */
7296                 struct netdev_phys_item_id ppid;
7297                 int err;
7298
7299                 err = ops->ndo_get_port_parent_id(netdev, &ppid);
7300                 WARN_ON(err != -EOPNOTSUPP);
7301         }
7302         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
7303 }
7304 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
7305
7306 /**
7307  *      devlink_port_type_ib_set - Set port type to InfiniBand
7308  *
7309  *      @devlink_port: devlink port
7310  *      @ibdev: related IB device
7311  */
7312 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
7313                               struct ib_device *ibdev)
7314 {
7315         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
7316 }
7317 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
7318
7319 /**
7320  *      devlink_port_type_clear - Clear port type
7321  *
7322  *      @devlink_port: devlink port
7323  */
7324 void devlink_port_type_clear(struct devlink_port *devlink_port)
7325 {
7326         __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
7327         devlink_port_type_warn_schedule(devlink_port);
7328 }
7329 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
7330
7331 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
7332                                     enum devlink_port_flavour flavour,
7333                                     const unsigned char *switch_id,
7334                                     unsigned char switch_id_len)
7335 {
7336         struct devlink_port_attrs *attrs = &devlink_port->attrs;
7337
7338         if (WARN_ON(devlink_port->registered))
7339                 return -EEXIST;
7340         attrs->set = true;
7341         attrs->flavour = flavour;
7342         if (switch_id) {
7343                 attrs->switch_port = true;
7344                 if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
7345                         switch_id_len = MAX_PHYS_ITEM_ID_LEN;
7346                 memcpy(attrs->switch_id.id, switch_id, switch_id_len);
7347                 attrs->switch_id.id_len = switch_id_len;
7348         } else {
7349                 attrs->switch_port = false;
7350         }
7351         return 0;
7352 }
7353
7354 /**
7355  *      devlink_port_attrs_set - Set port attributes
7356  *
7357  *      @devlink_port: devlink port
7358  *      @flavour: flavour of the port
7359  *      @port_number: number of the port that is facing user, for example
7360  *                    the front panel port number
7361  *      @split: indicates if this is split port
7362  *      @split_subport_number: if the port is split, this is the number
7363  *                             of subport.
7364  *      @switch_id: if the port is part of switch, this is buffer with ID,
7365  *                  otwerwise this is NULL
7366  *      @switch_id_len: length of the switch_id buffer
7367  */
7368 void devlink_port_attrs_set(struct devlink_port *devlink_port,
7369                             enum devlink_port_flavour flavour,
7370                             u32 port_number, bool split,
7371                             u32 split_subport_number,
7372                             const unsigned char *switch_id,
7373                             unsigned char switch_id_len)
7374 {
7375         struct devlink_port_attrs *attrs = &devlink_port->attrs;
7376         int ret;
7377
7378         ret = __devlink_port_attrs_set(devlink_port, flavour,
7379                                        switch_id, switch_id_len);
7380         if (ret)
7381                 return;
7382         attrs->split = split;
7383         attrs->phys.port_number = port_number;
7384         attrs->phys.split_subport_number = split_subport_number;
7385 }
7386 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
7387
7388 /**
7389  *      devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
7390  *
7391  *      @devlink_port: devlink port
7392  *      @pf: associated PF for the devlink port instance
7393  *      @switch_id: if the port is part of switch, this is buffer with ID,
7394  *                  otherwise this is NULL
7395  *      @switch_id_len: length of the switch_id buffer
7396  */
7397 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
7398                                    const unsigned char *switch_id,
7399                                    unsigned char switch_id_len, u16 pf)
7400 {
7401         struct devlink_port_attrs *attrs = &devlink_port->attrs;
7402         int ret;
7403
7404         ret = __devlink_port_attrs_set(devlink_port,
7405                                        DEVLINK_PORT_FLAVOUR_PCI_PF,
7406                                        switch_id, switch_id_len);
7407         if (ret)
7408                 return;
7409
7410         attrs->pci_pf.pf = pf;
7411 }
7412 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
7413
7414 /**
7415  *      devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
7416  *
7417  *      @devlink_port: devlink port
7418  *      @pf: associated PF for the devlink port instance
7419  *      @vf: associated VF of a PF for the devlink port instance
7420  *      @switch_id: if the port is part of switch, this is buffer with ID,
7421  *                  otherwise this is NULL
7422  *      @switch_id_len: length of the switch_id buffer
7423  */
7424 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
7425                                    const unsigned char *switch_id,
7426                                    unsigned char switch_id_len,
7427                                    u16 pf, u16 vf)
7428 {
7429         struct devlink_port_attrs *attrs = &devlink_port->attrs;
7430         int ret;
7431
7432         ret = __devlink_port_attrs_set(devlink_port,
7433                                        DEVLINK_PORT_FLAVOUR_PCI_VF,
7434                                        switch_id, switch_id_len);
7435         if (ret)
7436                 return;
7437         attrs->pci_vf.pf = pf;
7438         attrs->pci_vf.vf = vf;
7439 }
7440 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
7441
7442 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
7443                                              char *name, size_t len)
7444 {
7445         struct devlink_port_attrs *attrs = &devlink_port->attrs;
7446         int n = 0;
7447
7448         if (!attrs->set)
7449                 return -EOPNOTSUPP;
7450
7451         switch (attrs->flavour) {
7452         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
7453         case DEVLINK_PORT_FLAVOUR_VIRTUAL:
7454                 if (!attrs->split)
7455                         n = snprintf(name, len, "p%u", attrs->phys.port_number);
7456                 else
7457                         n = snprintf(name, len, "p%us%u",
7458                                      attrs->phys.port_number,
7459                                      attrs->phys.split_subport_number);
7460                 break;
7461         case DEVLINK_PORT_FLAVOUR_CPU:
7462         case DEVLINK_PORT_FLAVOUR_DSA:
7463                 /* As CPU and DSA ports do not have a netdevice associated
7464                  * case should not ever happen.
7465                  */
7466                 WARN_ON(1);
7467                 return -EINVAL;
7468         case DEVLINK_PORT_FLAVOUR_PCI_PF:
7469                 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
7470                 break;
7471         case DEVLINK_PORT_FLAVOUR_PCI_VF:
7472                 n = snprintf(name, len, "pf%uvf%u",
7473                              attrs->pci_vf.pf, attrs->pci_vf.vf);
7474                 break;
7475         }
7476
7477         if (n >= len)
7478                 return -EINVAL;
7479
7480         return 0;
7481 }
7482
7483 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
7484                         u32 size, u16 ingress_pools_count,
7485                         u16 egress_pools_count, u16 ingress_tc_count,
7486                         u16 egress_tc_count)
7487 {
7488         struct devlink_sb *devlink_sb;
7489         int err = 0;
7490
7491         mutex_lock(&devlink->lock);
7492         if (devlink_sb_index_exists(devlink, sb_index)) {
7493                 err = -EEXIST;
7494                 goto unlock;
7495         }
7496
7497         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
7498         if (!devlink_sb) {
7499                 err = -ENOMEM;
7500                 goto unlock;
7501         }
7502         devlink_sb->index = sb_index;
7503         devlink_sb->size = size;
7504         devlink_sb->ingress_pools_count = ingress_pools_count;
7505         devlink_sb->egress_pools_count = egress_pools_count;
7506         devlink_sb->ingress_tc_count = ingress_tc_count;
7507         devlink_sb->egress_tc_count = egress_tc_count;
7508         list_add_tail(&devlink_sb->list, &devlink->sb_list);
7509 unlock:
7510         mutex_unlock(&devlink->lock);
7511         return err;
7512 }
7513 EXPORT_SYMBOL_GPL(devlink_sb_register);
7514
7515 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
7516 {
7517         struct devlink_sb *devlink_sb;
7518
7519         mutex_lock(&devlink->lock);
7520         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
7521         WARN_ON(!devlink_sb);
7522         list_del(&devlink_sb->list);
7523         mutex_unlock(&devlink->lock);
7524         kfree(devlink_sb);
7525 }
7526 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
7527
7528 /**
7529  *      devlink_dpipe_headers_register - register dpipe headers
7530  *
7531  *      @devlink: devlink
7532  *      @dpipe_headers: dpipe header array
7533  *
7534  *      Register the headers supported by hardware.
7535  */
7536 int devlink_dpipe_headers_register(struct devlink *devlink,
7537                                    struct devlink_dpipe_headers *dpipe_headers)
7538 {
7539         mutex_lock(&devlink->lock);
7540         devlink->dpipe_headers = dpipe_headers;
7541         mutex_unlock(&devlink->lock);
7542         return 0;
7543 }
7544 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
7545
7546 /**
7547  *      devlink_dpipe_headers_unregister - unregister dpipe headers
7548  *
7549  *      @devlink: devlink
7550  *
7551  *      Unregister the headers supported by hardware.
7552  */
7553 void devlink_dpipe_headers_unregister(struct devlink *devlink)
7554 {
7555         mutex_lock(&devlink->lock);
7556         devlink->dpipe_headers = NULL;
7557         mutex_unlock(&devlink->lock);
7558 }
7559 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
7560
7561 /**
7562  *      devlink_dpipe_table_counter_enabled - check if counter allocation
7563  *                                            required
7564  *      @devlink: devlink
7565  *      @table_name: tables name
7566  *
7567  *      Used by driver to check if counter allocation is required.
7568  *      After counter allocation is turned on the table entries
7569  *      are updated to include counter statistics.
7570  *
7571  *      After that point on the driver must respect the counter
7572  *      state so that each entry added to the table is added
7573  *      with a counter.
7574  */
7575 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
7576                                          const char *table_name)
7577 {
7578         struct devlink_dpipe_table *table;
7579         bool enabled;
7580
7581         rcu_read_lock();
7582         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7583                                          table_name, devlink);
7584         enabled = false;
7585         if (table)
7586                 enabled = table->counters_enabled;
7587         rcu_read_unlock();
7588         return enabled;
7589 }
7590 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
7591
7592 /**
7593  *      devlink_dpipe_table_register - register dpipe table
7594  *
7595  *      @devlink: devlink
7596  *      @table_name: table name
7597  *      @table_ops: table ops
7598  *      @priv: priv
7599  *      @counter_control_extern: external control for counters
7600  */
7601 int devlink_dpipe_table_register(struct devlink *devlink,
7602                                  const char *table_name,
7603                                  struct devlink_dpipe_table_ops *table_ops,
7604                                  void *priv, bool counter_control_extern)
7605 {
7606         struct devlink_dpipe_table *table;
7607         int err = 0;
7608
7609         if (WARN_ON(!table_ops->size_get))
7610                 return -EINVAL;
7611
7612         mutex_lock(&devlink->lock);
7613
7614         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
7615                                      devlink)) {
7616                 err = -EEXIST;
7617                 goto unlock;
7618         }
7619
7620         table = kzalloc(sizeof(*table), GFP_KERNEL);
7621         if (!table) {
7622                 err = -ENOMEM;
7623                 goto unlock;
7624         }
7625
7626         table->name = table_name;
7627         table->table_ops = table_ops;
7628         table->priv = priv;
7629         table->counter_control_extern = counter_control_extern;
7630
7631         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
7632 unlock:
7633         mutex_unlock(&devlink->lock);
7634         return err;
7635 }
7636 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
7637
7638 /**
7639  *      devlink_dpipe_table_unregister - unregister dpipe table
7640  *
7641  *      @devlink: devlink
7642  *      @table_name: table name
7643  */
7644 void devlink_dpipe_table_unregister(struct devlink *devlink,
7645                                     const char *table_name)
7646 {
7647         struct devlink_dpipe_table *table;
7648
7649         mutex_lock(&devlink->lock);
7650         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7651                                          table_name, devlink);
7652         if (!table)
7653                 goto unlock;
7654         list_del_rcu(&table->list);
7655         mutex_unlock(&devlink->lock);
7656         kfree_rcu(table, rcu);
7657         return;
7658 unlock:
7659         mutex_unlock(&devlink->lock);
7660 }
7661 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
7662
7663 /**
7664  *      devlink_resource_register - devlink resource register
7665  *
7666  *      @devlink: devlink
7667  *      @resource_name: resource's name
7668  *      @resource_size: resource's size
7669  *      @resource_id: resource's id
7670  *      @parent_resource_id: resource's parent id
7671  *      @size_params: size parameters
7672  */
7673 int devlink_resource_register(struct devlink *devlink,
7674                               const char *resource_name,
7675                               u64 resource_size,
7676                               u64 resource_id,
7677                               u64 parent_resource_id,
7678                               const struct devlink_resource_size_params *size_params)
7679 {
7680         struct devlink_resource *resource;
7681         struct list_head *resource_list;
7682         bool top_hierarchy;
7683         int err = 0;
7684
7685         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
7686
7687         mutex_lock(&devlink->lock);
7688         resource = devlink_resource_find(devlink, NULL, resource_id);
7689         if (resource) {
7690                 err = -EINVAL;
7691                 goto out;
7692         }
7693
7694         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
7695         if (!resource) {
7696                 err = -ENOMEM;
7697                 goto out;
7698         }
7699
7700         if (top_hierarchy) {
7701                 resource_list = &devlink->resource_list;
7702         } else {
7703                 struct devlink_resource *parent_resource;
7704
7705                 parent_resource = devlink_resource_find(devlink, NULL,
7706                                                         parent_resource_id);
7707                 if (parent_resource) {
7708                         resource_list = &parent_resource->resource_list;
7709                         resource->parent = parent_resource;
7710                 } else {
7711                         kfree(resource);
7712                         err = -EINVAL;
7713                         goto out;
7714                 }
7715         }
7716
7717         resource->name = resource_name;
7718         resource->size = resource_size;
7719         resource->size_new = resource_size;
7720         resource->id = resource_id;
7721         resource->size_valid = true;
7722         memcpy(&resource->size_params, size_params,
7723                sizeof(resource->size_params));
7724         INIT_LIST_HEAD(&resource->resource_list);
7725         list_add_tail(&resource->list, resource_list);
7726 out:
7727         mutex_unlock(&devlink->lock);
7728         return err;
7729 }
7730 EXPORT_SYMBOL_GPL(devlink_resource_register);
7731
7732 /**
7733  *      devlink_resources_unregister - free all resources
7734  *
7735  *      @devlink: devlink
7736  *      @resource: resource
7737  */
7738 void devlink_resources_unregister(struct devlink *devlink,
7739                                   struct devlink_resource *resource)
7740 {
7741         struct devlink_resource *tmp, *child_resource;
7742         struct list_head *resource_list;
7743
7744         if (resource)
7745                 resource_list = &resource->resource_list;
7746         else
7747                 resource_list = &devlink->resource_list;
7748
7749         if (!resource)
7750                 mutex_lock(&devlink->lock);
7751
7752         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
7753                 devlink_resources_unregister(devlink, child_resource);
7754                 list_del(&child_resource->list);
7755                 kfree(child_resource);
7756         }
7757
7758         if (!resource)
7759                 mutex_unlock(&devlink->lock);
7760 }
7761 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
7762
7763 /**
7764  *      devlink_resource_size_get - get and update size
7765  *
7766  *      @devlink: devlink
7767  *      @resource_id: the requested resource id
7768  *      @p_resource_size: ptr to update
7769  */
7770 int devlink_resource_size_get(struct devlink *devlink,
7771                               u64 resource_id,
7772                               u64 *p_resource_size)
7773 {
7774         struct devlink_resource *resource;
7775         int err = 0;
7776
7777         mutex_lock(&devlink->lock);
7778         resource = devlink_resource_find(devlink, NULL, resource_id);
7779         if (!resource) {
7780                 err = -EINVAL;
7781                 goto out;
7782         }
7783         *p_resource_size = resource->size_new;
7784         resource->size = resource->size_new;
7785 out:
7786         mutex_unlock(&devlink->lock);
7787         return err;
7788 }
7789 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
7790
7791 /**
7792  *      devlink_dpipe_table_resource_set - set the resource id
7793  *
7794  *      @devlink: devlink
7795  *      @table_name: table name
7796  *      @resource_id: resource id
7797  *      @resource_units: number of resource's units consumed per table's entry
7798  */
7799 int devlink_dpipe_table_resource_set(struct devlink *devlink,
7800                                      const char *table_name, u64 resource_id,
7801                                      u64 resource_units)
7802 {
7803         struct devlink_dpipe_table *table;
7804         int err = 0;
7805
7806         mutex_lock(&devlink->lock);
7807         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
7808                                          table_name, devlink);
7809         if (!table) {
7810                 err = -EINVAL;
7811                 goto out;
7812         }
7813         table->resource_id = resource_id;
7814         table->resource_units = resource_units;
7815         table->resource_valid = true;
7816 out:
7817         mutex_unlock(&devlink->lock);
7818         return err;
7819 }
7820 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
7821
7822 /**
7823  *      devlink_resource_occ_get_register - register occupancy getter
7824  *
7825  *      @devlink: devlink
7826  *      @resource_id: resource id
7827  *      @occ_get: occupancy getter callback
7828  *      @occ_get_priv: occupancy getter callback priv
7829  */
7830 void devlink_resource_occ_get_register(struct devlink *devlink,
7831                                        u64 resource_id,
7832                                        devlink_resource_occ_get_t *occ_get,
7833                                        void *occ_get_priv)
7834 {
7835         struct devlink_resource *resource;
7836
7837         mutex_lock(&devlink->lock);
7838         resource = devlink_resource_find(devlink, NULL, resource_id);
7839         if (WARN_ON(!resource))
7840                 goto out;
7841         WARN_ON(resource->occ_get);
7842
7843         resource->occ_get = occ_get;
7844         resource->occ_get_priv = occ_get_priv;
7845 out:
7846         mutex_unlock(&devlink->lock);
7847 }
7848 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
7849
7850 /**
7851  *      devlink_resource_occ_get_unregister - unregister occupancy getter
7852  *
7853  *      @devlink: devlink
7854  *      @resource_id: resource id
7855  */
7856 void devlink_resource_occ_get_unregister(struct devlink *devlink,
7857                                          u64 resource_id)
7858 {
7859         struct devlink_resource *resource;
7860
7861         mutex_lock(&devlink->lock);
7862         resource = devlink_resource_find(devlink, NULL, resource_id);
7863         if (WARN_ON(!resource))
7864                 goto out;
7865         WARN_ON(!resource->occ_get);
7866
7867         resource->occ_get = NULL;
7868         resource->occ_get_priv = NULL;
7869 out:
7870         mutex_unlock(&devlink->lock);
7871 }
7872 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
7873
7874 static int devlink_param_verify(const struct devlink_param *param)
7875 {
7876         if (!param || !param->name || !param->supported_cmodes)
7877                 return -EINVAL;
7878         if (param->generic)
7879                 return devlink_param_generic_verify(param);
7880         else
7881                 return devlink_param_driver_verify(param);
7882 }
7883
7884 static int __devlink_params_register(struct devlink *devlink,
7885                                      unsigned int port_index,
7886                                      struct list_head *param_list,
7887                                      const struct devlink_param *params,
7888                                      size_t params_count,
7889                                      enum devlink_command reg_cmd,
7890                                      enum devlink_command unreg_cmd)
7891 {
7892         const struct devlink_param *param = params;
7893         int i;
7894         int err;
7895
7896         mutex_lock(&devlink->lock);
7897         for (i = 0; i < params_count; i++, param++) {
7898                 err = devlink_param_verify(param);
7899                 if (err)
7900                         goto rollback;
7901
7902                 err = devlink_param_register_one(devlink, port_index,
7903                                                  param_list, param, reg_cmd);
7904                 if (err)
7905                         goto rollback;
7906         }
7907
7908         mutex_unlock(&devlink->lock);
7909         return 0;
7910
7911 rollback:
7912         if (!i)
7913                 goto unlock;
7914         for (param--; i > 0; i--, param--)
7915                 devlink_param_unregister_one(devlink, port_index, param_list,
7916                                              param, unreg_cmd);
7917 unlock:
7918         mutex_unlock(&devlink->lock);
7919         return err;
7920 }
7921
7922 static void __devlink_params_unregister(struct devlink *devlink,
7923                                         unsigned int port_index,
7924                                         struct list_head *param_list,
7925                                         const struct devlink_param *params,
7926                                         size_t params_count,
7927                                         enum devlink_command cmd)
7928 {
7929         const struct devlink_param *param = params;
7930         int i;
7931
7932         mutex_lock(&devlink->lock);
7933         for (i = 0; i < params_count; i++, param++)
7934                 devlink_param_unregister_one(devlink, 0, param_list, param,
7935                                              cmd);
7936         mutex_unlock(&devlink->lock);
7937 }
7938
7939 /**
7940  *      devlink_params_register - register configuration parameters
7941  *
7942  *      @devlink: devlink
7943  *      @params: configuration parameters array
7944  *      @params_count: number of parameters provided
7945  *
7946  *      Register the configuration parameters supported by the driver.
7947  */
7948 int devlink_params_register(struct devlink *devlink,
7949                             const struct devlink_param *params,
7950                             size_t params_count)
7951 {
7952         return __devlink_params_register(devlink, 0, &devlink->param_list,
7953                                          params, params_count,
7954                                          DEVLINK_CMD_PARAM_NEW,
7955                                          DEVLINK_CMD_PARAM_DEL);
7956 }
7957 EXPORT_SYMBOL_GPL(devlink_params_register);
7958
7959 /**
7960  *      devlink_params_unregister - unregister configuration parameters
7961  *      @devlink: devlink
7962  *      @params: configuration parameters to unregister
7963  *      @params_count: number of parameters provided
7964  */
7965 void devlink_params_unregister(struct devlink *devlink,
7966                                const struct devlink_param *params,
7967                                size_t params_count)
7968 {
7969         return __devlink_params_unregister(devlink, 0, &devlink->param_list,
7970                                            params, params_count,
7971                                            DEVLINK_CMD_PARAM_DEL);
7972 }
7973 EXPORT_SYMBOL_GPL(devlink_params_unregister);
7974
7975 /**
7976  *      devlink_params_publish - publish configuration parameters
7977  *
7978  *      @devlink: devlink
7979  *
7980  *      Publish previously registered configuration parameters.
7981  */
7982 void devlink_params_publish(struct devlink *devlink)
7983 {
7984         struct devlink_param_item *param_item;
7985
7986         list_for_each_entry(param_item, &devlink->param_list, list) {
7987                 if (param_item->published)
7988                         continue;
7989                 param_item->published = true;
7990                 devlink_param_notify(devlink, 0, param_item,
7991                                      DEVLINK_CMD_PARAM_NEW);
7992         }
7993 }
7994 EXPORT_SYMBOL_GPL(devlink_params_publish);
7995
7996 /**
7997  *      devlink_params_unpublish - unpublish configuration parameters
7998  *
7999  *      @devlink: devlink
8000  *
8001  *      Unpublish previously registered configuration parameters.
8002  */
8003 void devlink_params_unpublish(struct devlink *devlink)
8004 {
8005         struct devlink_param_item *param_item;
8006
8007         list_for_each_entry(param_item, &devlink->param_list, list) {
8008                 if (!param_item->published)
8009                         continue;
8010                 param_item->published = false;
8011                 devlink_param_notify(devlink, 0, param_item,
8012                                      DEVLINK_CMD_PARAM_DEL);
8013         }
8014 }
8015 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
8016
8017 /**
8018  *      devlink_port_params_register - register port configuration parameters
8019  *
8020  *      @devlink_port: devlink port
8021  *      @params: configuration parameters array
8022  *      @params_count: number of parameters provided
8023  *
8024  *      Register the configuration parameters supported by the port.
8025  */
8026 int devlink_port_params_register(struct devlink_port *devlink_port,
8027                                  const struct devlink_param *params,
8028                                  size_t params_count)
8029 {
8030         return __devlink_params_register(devlink_port->devlink,
8031                                          devlink_port->index,
8032                                          &devlink_port->param_list, params,
8033                                          params_count,
8034                                          DEVLINK_CMD_PORT_PARAM_NEW,
8035                                          DEVLINK_CMD_PORT_PARAM_DEL);
8036 }
8037 EXPORT_SYMBOL_GPL(devlink_port_params_register);
8038
8039 /**
8040  *      devlink_port_params_unregister - unregister port configuration
8041  *      parameters
8042  *
8043  *      @devlink_port: devlink port
8044  *      @params: configuration parameters array
8045  *      @params_count: number of parameters provided
8046  */
8047 void devlink_port_params_unregister(struct devlink_port *devlink_port,
8048                                     const struct devlink_param *params,
8049                                     size_t params_count)
8050 {
8051         return __devlink_params_unregister(devlink_port->devlink,
8052                                            devlink_port->index,
8053                                            &devlink_port->param_list,
8054                                            params, params_count,
8055                                            DEVLINK_CMD_PORT_PARAM_DEL);
8056 }
8057 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
8058
8059 static int
8060 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
8061                                      union devlink_param_value *init_val)
8062 {
8063         struct devlink_param_item *param_item;
8064
8065         param_item = devlink_param_find_by_id(param_list, param_id);
8066         if (!param_item)
8067                 return -EINVAL;
8068
8069         if (!param_item->driverinit_value_valid ||
8070             !devlink_param_cmode_is_supported(param_item->param,
8071                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
8072                 return -EOPNOTSUPP;
8073
8074         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8075                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
8076         else
8077                 *init_val = param_item->driverinit_value;
8078
8079         return 0;
8080 }
8081
8082 static int
8083 __devlink_param_driverinit_value_set(struct devlink *devlink,
8084                                      unsigned int port_index,
8085                                      struct list_head *param_list, u32 param_id,
8086                                      union devlink_param_value init_val,
8087                                      enum devlink_command cmd)
8088 {
8089         struct devlink_param_item *param_item;
8090
8091         param_item = devlink_param_find_by_id(param_list, param_id);
8092         if (!param_item)
8093                 return -EINVAL;
8094
8095         if (!devlink_param_cmode_is_supported(param_item->param,
8096                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
8097                 return -EOPNOTSUPP;
8098
8099         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
8100                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
8101         else
8102                 param_item->driverinit_value = init_val;
8103         param_item->driverinit_value_valid = true;
8104
8105         devlink_param_notify(devlink, port_index, param_item, cmd);
8106         return 0;
8107 }
8108
8109 /**
8110  *      devlink_param_driverinit_value_get - get configuration parameter
8111  *                                           value for driver initializing
8112  *
8113  *      @devlink: devlink
8114  *      @param_id: parameter ID
8115  *      @init_val: value of parameter in driverinit configuration mode
8116  *
8117  *      This function should be used by the driver to get driverinit
8118  *      configuration for initialization after reload command.
8119  */
8120 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
8121                                        union devlink_param_value *init_val)
8122 {
8123         if (!devlink_reload_supported(devlink))
8124                 return -EOPNOTSUPP;
8125
8126         return __devlink_param_driverinit_value_get(&devlink->param_list,
8127                                                     param_id, init_val);
8128 }
8129 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
8130
8131 /**
8132  *      devlink_param_driverinit_value_set - set value of configuration
8133  *                                           parameter for driverinit
8134  *                                           configuration mode
8135  *
8136  *      @devlink: devlink
8137  *      @param_id: parameter ID
8138  *      @init_val: value of parameter to set for driverinit configuration mode
8139  *
8140  *      This function should be used by the driver to set driverinit
8141  *      configuration mode default value.
8142  */
8143 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
8144                                        union devlink_param_value init_val)
8145 {
8146         return __devlink_param_driverinit_value_set(devlink, 0,
8147                                                     &devlink->param_list,
8148                                                     param_id, init_val,
8149                                                     DEVLINK_CMD_PARAM_NEW);
8150 }
8151 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
8152
8153 /**
8154  *      devlink_port_param_driverinit_value_get - get configuration parameter
8155  *                                              value for driver initializing
8156  *
8157  *      @devlink_port: devlink_port
8158  *      @param_id: parameter ID
8159  *      @init_val: value of parameter in driverinit configuration mode
8160  *
8161  *      This function should be used by the driver to get driverinit
8162  *      configuration for initialization after reload command.
8163  */
8164 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
8165                                             u32 param_id,
8166                                             union devlink_param_value *init_val)
8167 {
8168         struct devlink *devlink = devlink_port->devlink;
8169
8170         if (!devlink_reload_supported(devlink))
8171                 return -EOPNOTSUPP;
8172
8173         return __devlink_param_driverinit_value_get(&devlink_port->param_list,
8174                                                     param_id, init_val);
8175 }
8176 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
8177
8178 /**
8179  *     devlink_port_param_driverinit_value_set - set value of configuration
8180  *                                               parameter for driverinit
8181  *                                               configuration mode
8182  *
8183  *     @devlink_port: devlink_port
8184  *     @param_id: parameter ID
8185  *     @init_val: value of parameter to set for driverinit configuration mode
8186  *
8187  *     This function should be used by the driver to set driverinit
8188  *     configuration mode default value.
8189  */
8190 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
8191                                             u32 param_id,
8192                                             union devlink_param_value init_val)
8193 {
8194         return __devlink_param_driverinit_value_set(devlink_port->devlink,
8195                                                     devlink_port->index,
8196                                                     &devlink_port->param_list,
8197                                                     param_id, init_val,
8198                                                     DEVLINK_CMD_PORT_PARAM_NEW);
8199 }
8200 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
8201
8202 /**
8203  *      devlink_param_value_changed - notify devlink on a parameter's value
8204  *                                    change. Should be called by the driver
8205  *                                    right after the change.
8206  *
8207  *      @devlink: devlink
8208  *      @param_id: parameter ID
8209  *
8210  *      This function should be used by the driver to notify devlink on value
8211  *      change, excluding driverinit configuration mode.
8212  *      For driverinit configuration mode driver should use the function
8213  */
8214 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
8215 {
8216         struct devlink_param_item *param_item;
8217
8218         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
8219         WARN_ON(!param_item);
8220
8221         devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
8222 }
8223 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
8224
8225 /**
8226  *     devlink_port_param_value_changed - notify devlink on a parameter's value
8227  *                                      change. Should be called by the driver
8228  *                                      right after the change.
8229  *
8230  *     @devlink_port: devlink_port
8231  *     @param_id: parameter ID
8232  *
8233  *     This function should be used by the driver to notify devlink on value
8234  *     change, excluding driverinit configuration mode.
8235  *     For driverinit configuration mode driver should use the function
8236  *     devlink_port_param_driverinit_value_set() instead.
8237  */
8238 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
8239                                       u32 param_id)
8240 {
8241         struct devlink_param_item *param_item;
8242
8243         param_item = devlink_param_find_by_id(&devlink_port->param_list,
8244                                               param_id);
8245         WARN_ON(!param_item);
8246
8247         devlink_param_notify(devlink_port->devlink, devlink_port->index,
8248                              param_item, DEVLINK_CMD_PORT_PARAM_NEW);
8249 }
8250 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
8251
8252 /**
8253  *      devlink_param_value_str_fill - Safely fill-up the string preventing
8254  *                                     from overflow of the preallocated buffer
8255  *
8256  *      @dst_val: destination devlink_param_value
8257  *      @src: source buffer
8258  */
8259 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
8260                                   const char *src)
8261 {
8262         size_t len;
8263
8264         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
8265         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
8266 }
8267 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
8268
8269 /**
8270  *      devlink_region_create - create a new address region
8271  *
8272  *      @devlink: devlink
8273  *      @ops: region operations and name
8274  *      @region_max_snapshots: Maximum supported number of snapshots for region
8275  *      @region_size: size of region
8276  */
8277 struct devlink_region *
8278 devlink_region_create(struct devlink *devlink,
8279                       const struct devlink_region_ops *ops,
8280                       u32 region_max_snapshots, u64 region_size)
8281 {
8282         struct devlink_region *region;
8283         int err = 0;
8284
8285         if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
8286                 return ERR_PTR(-EINVAL);
8287
8288         mutex_lock(&devlink->lock);
8289
8290         if (devlink_region_get_by_name(devlink, ops->name)) {
8291                 err = -EEXIST;
8292                 goto unlock;
8293         }
8294
8295         region = kzalloc(sizeof(*region), GFP_KERNEL);
8296         if (!region) {
8297                 err = -ENOMEM;
8298                 goto unlock;
8299         }
8300
8301         region->devlink = devlink;
8302         region->max_snapshots = region_max_snapshots;
8303         region->ops = ops;
8304         region->size = region_size;
8305         INIT_LIST_HEAD(&region->snapshot_list);
8306         list_add_tail(&region->list, &devlink->region_list);
8307         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
8308
8309         mutex_unlock(&devlink->lock);
8310         return region;
8311
8312 unlock:
8313         mutex_unlock(&devlink->lock);
8314         return ERR_PTR(err);
8315 }
8316 EXPORT_SYMBOL_GPL(devlink_region_create);
8317
8318 /**
8319  *      devlink_region_destroy - destroy address region
8320  *
8321  *      @region: devlink region to destroy
8322  */
8323 void devlink_region_destroy(struct devlink_region *region)
8324 {
8325         struct devlink *devlink = region->devlink;
8326         struct devlink_snapshot *snapshot, *ts;
8327
8328         mutex_lock(&devlink->lock);
8329
8330         /* Free all snapshots of region */
8331         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
8332                 devlink_region_snapshot_del(region, snapshot);
8333
8334         list_del(&region->list);
8335
8336         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
8337         mutex_unlock(&devlink->lock);
8338         kfree(region);
8339 }
8340 EXPORT_SYMBOL_GPL(devlink_region_destroy);
8341
8342 /**
8343  *      devlink_region_snapshot_id_get - get snapshot ID
8344  *
8345  *      This callback should be called when adding a new snapshot,
8346  *      Driver should use the same id for multiple snapshots taken
8347  *      on multiple regions at the same time/by the same trigger.
8348  *
8349  *      The caller of this function must use devlink_region_snapshot_id_put
8350  *      when finished creating regions using this id.
8351  *
8352  *      Returns zero on success, or a negative error code on failure.
8353  *
8354  *      @devlink: devlink
8355  *      @id: storage to return id
8356  */
8357 int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
8358 {
8359         int err;
8360
8361         mutex_lock(&devlink->lock);
8362         err = __devlink_region_snapshot_id_get(devlink, id);
8363         mutex_unlock(&devlink->lock);
8364
8365         return err;
8366 }
8367 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
8368
8369 /**
8370  *      devlink_region_snapshot_id_put - put snapshot ID reference
8371  *
8372  *      This should be called by a driver after finishing creating snapshots
8373  *      with an id. Doing so ensures that the ID can later be released in the
8374  *      event that all snapshots using it have been destroyed.
8375  *
8376  *      @devlink: devlink
8377  *      @id: id to release reference on
8378  */
8379 void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
8380 {
8381         mutex_lock(&devlink->lock);
8382         __devlink_snapshot_id_decrement(devlink, id);
8383         mutex_unlock(&devlink->lock);
8384 }
8385 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
8386
8387 /**
8388  *      devlink_region_snapshot_create - create a new snapshot
8389  *      This will add a new snapshot of a region. The snapshot
8390  *      will be stored on the region struct and can be accessed
8391  *      from devlink. This is useful for future analyses of snapshots.
8392  *      Multiple snapshots can be created on a region.
8393  *      The @snapshot_id should be obtained using the getter function.
8394  *
8395  *      @region: devlink region of the snapshot
8396  *      @data: snapshot data
8397  *      @snapshot_id: snapshot id to be created
8398  */
8399 int devlink_region_snapshot_create(struct devlink_region *region,
8400                                    u8 *data, u32 snapshot_id)
8401 {
8402         struct devlink *devlink = region->devlink;
8403         int err;
8404
8405         mutex_lock(&devlink->lock);
8406         err = __devlink_region_snapshot_create(region, data, snapshot_id);
8407         mutex_unlock(&devlink->lock);
8408
8409         return err;
8410 }
8411 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
8412
8413 #define DEVLINK_TRAP(_id, _type)                                              \
8414         {                                                                     \
8415                 .type = DEVLINK_TRAP_TYPE_##_type,                            \
8416                 .id = DEVLINK_TRAP_GENERIC_ID_##_id,                          \
8417                 .name = DEVLINK_TRAP_GENERIC_NAME_##_id,                      \
8418         }
8419
8420 static const struct devlink_trap devlink_trap_generic[] = {
8421         DEVLINK_TRAP(SMAC_MC, DROP),
8422         DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
8423         DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
8424         DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
8425         DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
8426         DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
8427         DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
8428         DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
8429         DEVLINK_TRAP(TAIL_DROP, DROP),
8430         DEVLINK_TRAP(NON_IP_PACKET, DROP),
8431         DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
8432         DEVLINK_TRAP(DIP_LB, DROP),
8433         DEVLINK_TRAP(SIP_MC, DROP),
8434         DEVLINK_TRAP(SIP_LB, DROP),
8435         DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
8436         DEVLINK_TRAP(IPV4_SIP_BC, DROP),
8437         DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
8438         DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
8439         DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
8440         DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
8441         DEVLINK_TRAP(RPF, EXCEPTION),
8442         DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
8443         DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
8444         DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
8445         DEVLINK_TRAP(NON_ROUTABLE, DROP),
8446         DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
8447         DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
8448         DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
8449         DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
8450 };
8451
8452 #define DEVLINK_TRAP_GROUP(_id)                                               \
8453         {                                                                     \
8454                 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id,                    \
8455                 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id,                \
8456         }
8457
8458 static const struct devlink_trap_group devlink_trap_group_generic[] = {
8459         DEVLINK_TRAP_GROUP(L2_DROPS),
8460         DEVLINK_TRAP_GROUP(L3_DROPS),
8461         DEVLINK_TRAP_GROUP(BUFFER_DROPS),
8462         DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
8463         DEVLINK_TRAP_GROUP(ACL_DROPS),
8464 };
8465
8466 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
8467 {
8468         if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
8469                 return -EINVAL;
8470
8471         if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
8472                 return -EINVAL;
8473
8474         if (trap->type != devlink_trap_generic[trap->id].type)
8475                 return -EINVAL;
8476
8477         return 0;
8478 }
8479
8480 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
8481 {
8482         int i;
8483
8484         if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
8485                 return -EINVAL;
8486
8487         for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
8488                 if (!strcmp(trap->name, devlink_trap_generic[i].name))
8489                         return -EEXIST;
8490         }
8491
8492         return 0;
8493 }
8494
8495 static int devlink_trap_verify(const struct devlink_trap *trap)
8496 {
8497         if (!trap || !trap->name)
8498                 return -EINVAL;
8499
8500         if (trap->generic)
8501                 return devlink_trap_generic_verify(trap);
8502         else
8503                 return devlink_trap_driver_verify(trap);
8504 }
8505
8506 static int
8507 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
8508 {
8509         if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8510                 return -EINVAL;
8511
8512         if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
8513                 return -EINVAL;
8514
8515         return 0;
8516 }
8517
8518 static int
8519 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
8520 {
8521         int i;
8522
8523         if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
8524                 return -EINVAL;
8525
8526         for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
8527                 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
8528                         return -EEXIST;
8529         }
8530
8531         return 0;
8532 }
8533
8534 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
8535 {
8536         if (group->generic)
8537                 return devlink_trap_group_generic_verify(group);
8538         else
8539                 return devlink_trap_group_driver_verify(group);
8540 }
8541
8542 static void
8543 devlink_trap_group_notify(struct devlink *devlink,
8544                           const struct devlink_trap_group_item *group_item,
8545                           enum devlink_command cmd)
8546 {
8547         struct sk_buff *msg;
8548         int err;
8549
8550         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
8551                      cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
8552
8553         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8554         if (!msg)
8555                 return;
8556
8557         err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
8558                                          0);
8559         if (err) {
8560                 nlmsg_free(msg);
8561                 return;
8562         }
8563
8564         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8565                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8566 }
8567
8568 static int
8569 devlink_trap_item_group_link(struct devlink *devlink,
8570                              struct devlink_trap_item *trap_item)
8571 {
8572         u16 group_id = trap_item->trap->init_group_id;
8573         struct devlink_trap_group_item *group_item;
8574
8575         group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
8576         if (WARN_ON_ONCE(!group_item))
8577                 return -EINVAL;
8578
8579         trap_item->group_item = group_item;
8580
8581         return 0;
8582 }
8583
8584 static void devlink_trap_notify(struct devlink *devlink,
8585                                 const struct devlink_trap_item *trap_item,
8586                                 enum devlink_command cmd)
8587 {
8588         struct sk_buff *msg;
8589         int err;
8590
8591         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
8592                      cmd != DEVLINK_CMD_TRAP_DEL);
8593
8594         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8595         if (!msg)
8596                 return;
8597
8598         err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
8599         if (err) {
8600                 nlmsg_free(msg);
8601                 return;
8602         }
8603
8604         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8605                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8606 }
8607
8608 static int
8609 devlink_trap_register(struct devlink *devlink,
8610                       const struct devlink_trap *trap, void *priv)
8611 {
8612         struct devlink_trap_item *trap_item;
8613         int err;
8614
8615         if (devlink_trap_item_lookup(devlink, trap->name))
8616                 return -EEXIST;
8617
8618         trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
8619         if (!trap_item)
8620                 return -ENOMEM;
8621
8622         trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8623         if (!trap_item->stats) {
8624                 err = -ENOMEM;
8625                 goto err_stats_alloc;
8626         }
8627
8628         trap_item->trap = trap;
8629         trap_item->action = trap->init_action;
8630         trap_item->priv = priv;
8631
8632         err = devlink_trap_item_group_link(devlink, trap_item);
8633         if (err)
8634                 goto err_group_link;
8635
8636         err = devlink->ops->trap_init(devlink, trap, trap_item);
8637         if (err)
8638                 goto err_trap_init;
8639
8640         list_add_tail(&trap_item->list, &devlink->trap_list);
8641         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
8642
8643         return 0;
8644
8645 err_trap_init:
8646 err_group_link:
8647         free_percpu(trap_item->stats);
8648 err_stats_alloc:
8649         kfree(trap_item);
8650         return err;
8651 }
8652
8653 static void devlink_trap_unregister(struct devlink *devlink,
8654                                     const struct devlink_trap *trap)
8655 {
8656         struct devlink_trap_item *trap_item;
8657
8658         trap_item = devlink_trap_item_lookup(devlink, trap->name);
8659         if (WARN_ON_ONCE(!trap_item))
8660                 return;
8661
8662         devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
8663         list_del(&trap_item->list);
8664         if (devlink->ops->trap_fini)
8665                 devlink->ops->trap_fini(devlink, trap, trap_item);
8666         free_percpu(trap_item->stats);
8667         kfree(trap_item);
8668 }
8669
8670 static void devlink_trap_disable(struct devlink *devlink,
8671                                  const struct devlink_trap *trap)
8672 {
8673         struct devlink_trap_item *trap_item;
8674
8675         trap_item = devlink_trap_item_lookup(devlink, trap->name);
8676         if (WARN_ON_ONCE(!trap_item))
8677                 return;
8678
8679         devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
8680         trap_item->action = DEVLINK_TRAP_ACTION_DROP;
8681 }
8682
8683 /**
8684  * devlink_traps_register - Register packet traps with devlink.
8685  * @devlink: devlink.
8686  * @traps: Packet traps.
8687  * @traps_count: Count of provided packet traps.
8688  * @priv: Driver private information.
8689  *
8690  * Return: Non-zero value on failure.
8691  */
8692 int devlink_traps_register(struct devlink *devlink,
8693                            const struct devlink_trap *traps,
8694                            size_t traps_count, void *priv)
8695 {
8696         int i, err;
8697
8698         if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
8699                 return -EINVAL;
8700
8701         mutex_lock(&devlink->lock);
8702         for (i = 0; i < traps_count; i++) {
8703                 const struct devlink_trap *trap = &traps[i];
8704
8705                 err = devlink_trap_verify(trap);
8706                 if (err)
8707                         goto err_trap_verify;
8708
8709                 err = devlink_trap_register(devlink, trap, priv);
8710                 if (err)
8711                         goto err_trap_register;
8712         }
8713         mutex_unlock(&devlink->lock);
8714
8715         return 0;
8716
8717 err_trap_register:
8718 err_trap_verify:
8719         for (i--; i >= 0; i--)
8720                 devlink_trap_unregister(devlink, &traps[i]);
8721         mutex_unlock(&devlink->lock);
8722         return err;
8723 }
8724 EXPORT_SYMBOL_GPL(devlink_traps_register);
8725
8726 /**
8727  * devlink_traps_unregister - Unregister packet traps from devlink.
8728  * @devlink: devlink.
8729  * @traps: Packet traps.
8730  * @traps_count: Count of provided packet traps.
8731  */
8732 void devlink_traps_unregister(struct devlink *devlink,
8733                               const struct devlink_trap *traps,
8734                               size_t traps_count)
8735 {
8736         int i;
8737
8738         mutex_lock(&devlink->lock);
8739         /* Make sure we do not have any packets in-flight while unregistering
8740          * traps by disabling all of them and waiting for a grace period.
8741          */
8742         for (i = traps_count - 1; i >= 0; i--)
8743                 devlink_trap_disable(devlink, &traps[i]);
8744         synchronize_rcu();
8745         for (i = traps_count - 1; i >= 0; i--)
8746                 devlink_trap_unregister(devlink, &traps[i]);
8747         mutex_unlock(&devlink->lock);
8748 }
8749 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
8750
8751 static void
8752 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
8753                           size_t skb_len)
8754 {
8755         struct devlink_stats *stats;
8756
8757         stats = this_cpu_ptr(trap_stats);
8758         u64_stats_update_begin(&stats->syncp);
8759         stats->rx_bytes += skb_len;
8760         stats->rx_packets++;
8761         u64_stats_update_end(&stats->syncp);
8762 }
8763
8764 static void
8765 devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
8766                                   const struct devlink_trap_item *trap_item,
8767                                   struct devlink_port *in_devlink_port,
8768                                   const struct flow_action_cookie *fa_cookie)
8769 {
8770         struct devlink_trap_group_item *group_item = trap_item->group_item;
8771
8772         hw_metadata->trap_group_name = group_item->group->name;
8773         hw_metadata->trap_name = trap_item->trap->name;
8774         hw_metadata->fa_cookie = fa_cookie;
8775
8776         spin_lock(&in_devlink_port->type_lock);
8777         if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
8778                 hw_metadata->input_dev = in_devlink_port->type_dev;
8779         spin_unlock(&in_devlink_port->type_lock);
8780 }
8781
8782 /**
8783  * devlink_trap_report - Report trapped packet to drop monitor.
8784  * @devlink: devlink.
8785  * @skb: Trapped packet.
8786  * @trap_ctx: Trap context.
8787  * @in_devlink_port: Input devlink port.
8788  * @fa_cookie: Flow action cookie. Could be NULL.
8789  */
8790 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
8791                          void *trap_ctx, struct devlink_port *in_devlink_port,
8792                          const struct flow_action_cookie *fa_cookie)
8793
8794 {
8795         struct devlink_trap_item *trap_item = trap_ctx;
8796         struct net_dm_hw_metadata hw_metadata = {};
8797
8798         devlink_trap_stats_update(trap_item->stats, skb->len);
8799         devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
8800
8801         devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
8802                                           in_devlink_port, fa_cookie);
8803         net_dm_hw_report(skb, &hw_metadata);
8804 }
8805 EXPORT_SYMBOL_GPL(devlink_trap_report);
8806
8807 /**
8808  * devlink_trap_ctx_priv - Trap context to driver private information.
8809  * @trap_ctx: Trap context.
8810  *
8811  * Return: Driver private information passed during registration.
8812  */
8813 void *devlink_trap_ctx_priv(void *trap_ctx)
8814 {
8815         struct devlink_trap_item *trap_item = trap_ctx;
8816
8817         return trap_item->priv;
8818 }
8819 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
8820
8821 static int
8822 devlink_trap_group_item_policer_link(struct devlink *devlink,
8823                                      struct devlink_trap_group_item *group_item)
8824 {
8825         u32 policer_id = group_item->group->init_policer_id;
8826         struct devlink_trap_policer_item *policer_item;
8827
8828         if (policer_id == 0)
8829                 return 0;
8830
8831         policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
8832         if (WARN_ON_ONCE(!policer_item))
8833                 return -EINVAL;
8834
8835         group_item->policer_item = policer_item;
8836
8837         return 0;
8838 }
8839
8840 static int
8841 devlink_trap_group_register(struct devlink *devlink,
8842                             const struct devlink_trap_group *group)
8843 {
8844         struct devlink_trap_group_item *group_item;
8845         int err;
8846
8847         if (devlink_trap_group_item_lookup(devlink, group->name))
8848                 return -EEXIST;
8849
8850         group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
8851         if (!group_item)
8852                 return -ENOMEM;
8853
8854         group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
8855         if (!group_item->stats) {
8856                 err = -ENOMEM;
8857                 goto err_stats_alloc;
8858         }
8859
8860         group_item->group = group;
8861
8862         err = devlink_trap_group_item_policer_link(devlink, group_item);
8863         if (err)
8864                 goto err_policer_link;
8865
8866         if (devlink->ops->trap_group_init) {
8867                 err = devlink->ops->trap_group_init(devlink, group);
8868                 if (err)
8869                         goto err_group_init;
8870         }
8871
8872         list_add_tail(&group_item->list, &devlink->trap_group_list);
8873         devlink_trap_group_notify(devlink, group_item,
8874                                   DEVLINK_CMD_TRAP_GROUP_NEW);
8875
8876         return 0;
8877
8878 err_group_init:
8879 err_policer_link:
8880         free_percpu(group_item->stats);
8881 err_stats_alloc:
8882         kfree(group_item);
8883         return err;
8884 }
8885
8886 static void
8887 devlink_trap_group_unregister(struct devlink *devlink,
8888                               const struct devlink_trap_group *group)
8889 {
8890         struct devlink_trap_group_item *group_item;
8891
8892         group_item = devlink_trap_group_item_lookup(devlink, group->name);
8893         if (WARN_ON_ONCE(!group_item))
8894                 return;
8895
8896         devlink_trap_group_notify(devlink, group_item,
8897                                   DEVLINK_CMD_TRAP_GROUP_DEL);
8898         list_del(&group_item->list);
8899         free_percpu(group_item->stats);
8900         kfree(group_item);
8901 }
8902
8903 /**
8904  * devlink_trap_groups_register - Register packet trap groups with devlink.
8905  * @devlink: devlink.
8906  * @groups: Packet trap groups.
8907  * @groups_count: Count of provided packet trap groups.
8908  *
8909  * Return: Non-zero value on failure.
8910  */
8911 int devlink_trap_groups_register(struct devlink *devlink,
8912                                  const struct devlink_trap_group *groups,
8913                                  size_t groups_count)
8914 {
8915         int i, err;
8916
8917         mutex_lock(&devlink->lock);
8918         for (i = 0; i < groups_count; i++) {
8919                 const struct devlink_trap_group *group = &groups[i];
8920
8921                 err = devlink_trap_group_verify(group);
8922                 if (err)
8923                         goto err_trap_group_verify;
8924
8925                 err = devlink_trap_group_register(devlink, group);
8926                 if (err)
8927                         goto err_trap_group_register;
8928         }
8929         mutex_unlock(&devlink->lock);
8930
8931         return 0;
8932
8933 err_trap_group_register:
8934 err_trap_group_verify:
8935         for (i--; i >= 0; i--)
8936                 devlink_trap_group_unregister(devlink, &groups[i]);
8937         mutex_unlock(&devlink->lock);
8938         return err;
8939 }
8940 EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
8941
8942 /**
8943  * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
8944  * @devlink: devlink.
8945  * @groups: Packet trap groups.
8946  * @groups_count: Count of provided packet trap groups.
8947  */
8948 void devlink_trap_groups_unregister(struct devlink *devlink,
8949                                     const struct devlink_trap_group *groups,
8950                                     size_t groups_count)
8951 {
8952         int i;
8953
8954         mutex_lock(&devlink->lock);
8955         for (i = groups_count - 1; i >= 0; i--)
8956                 devlink_trap_group_unregister(devlink, &groups[i]);
8957         mutex_unlock(&devlink->lock);
8958 }
8959 EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
8960
8961 static void
8962 devlink_trap_policer_notify(struct devlink *devlink,
8963                             const struct devlink_trap_policer_item *policer_item,
8964                             enum devlink_command cmd)
8965 {
8966         struct sk_buff *msg;
8967         int err;
8968
8969         WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
8970                      cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
8971
8972         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8973         if (!msg)
8974                 return;
8975
8976         err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
8977                                            0, 0);
8978         if (err) {
8979                 nlmsg_free(msg);
8980                 return;
8981         }
8982
8983         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
8984                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
8985 }
8986
8987 static int
8988 devlink_trap_policer_register(struct devlink *devlink,
8989                               const struct devlink_trap_policer *policer)
8990 {
8991         struct devlink_trap_policer_item *policer_item;
8992         int err;
8993
8994         if (devlink_trap_policer_item_lookup(devlink, policer->id))
8995                 return -EEXIST;
8996
8997         policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
8998         if (!policer_item)
8999                 return -ENOMEM;
9000
9001         policer_item->policer = policer;
9002         policer_item->rate = policer->init_rate;
9003         policer_item->burst = policer->init_burst;
9004
9005         if (devlink->ops->trap_policer_init) {
9006                 err = devlink->ops->trap_policer_init(devlink, policer);
9007                 if (err)
9008                         goto err_policer_init;
9009         }
9010
9011         list_add_tail(&policer_item->list, &devlink->trap_policer_list);
9012         devlink_trap_policer_notify(devlink, policer_item,
9013                                     DEVLINK_CMD_TRAP_POLICER_NEW);
9014
9015         return 0;
9016
9017 err_policer_init:
9018         kfree(policer_item);
9019         return err;
9020 }
9021
9022 static void
9023 devlink_trap_policer_unregister(struct devlink *devlink,
9024                                 const struct devlink_trap_policer *policer)
9025 {
9026         struct devlink_trap_policer_item *policer_item;
9027
9028         policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
9029         if (WARN_ON_ONCE(!policer_item))
9030                 return;
9031
9032         devlink_trap_policer_notify(devlink, policer_item,
9033                                     DEVLINK_CMD_TRAP_POLICER_DEL);
9034         list_del(&policer_item->list);
9035         if (devlink->ops->trap_policer_fini)
9036                 devlink->ops->trap_policer_fini(devlink, policer);
9037         kfree(policer_item);
9038 }
9039
9040 /**
9041  * devlink_trap_policers_register - Register packet trap policers with devlink.
9042  * @devlink: devlink.
9043  * @policers: Packet trap policers.
9044  * @policers_count: Count of provided packet trap policers.
9045  *
9046  * Return: Non-zero value on failure.
9047  */
9048 int
9049 devlink_trap_policers_register(struct devlink *devlink,
9050                                const struct devlink_trap_policer *policers,
9051                                size_t policers_count)
9052 {
9053         int i, err;
9054
9055         mutex_lock(&devlink->lock);
9056         for (i = 0; i < policers_count; i++) {
9057                 const struct devlink_trap_policer *policer = &policers[i];
9058
9059                 if (WARN_ON(policer->id == 0 ||
9060                             policer->max_rate < policer->min_rate ||
9061                             policer->max_burst < policer->min_burst)) {
9062                         err = -EINVAL;
9063                         goto err_trap_policer_verify;
9064                 }
9065
9066                 err = devlink_trap_policer_register(devlink, policer);
9067                 if (err)
9068                         goto err_trap_policer_register;
9069         }
9070         mutex_unlock(&devlink->lock);
9071
9072         return 0;
9073
9074 err_trap_policer_register:
9075 err_trap_policer_verify:
9076         for (i--; i >= 0; i--)
9077                 devlink_trap_policer_unregister(devlink, &policers[i]);
9078         mutex_unlock(&devlink->lock);
9079         return err;
9080 }
9081 EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
9082
9083 /**
9084  * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
9085  * @devlink: devlink.
9086  * @policers: Packet trap policers.
9087  * @policers_count: Count of provided packet trap policers.
9088  */
9089 void
9090 devlink_trap_policers_unregister(struct devlink *devlink,
9091                                  const struct devlink_trap_policer *policers,
9092                                  size_t policers_count)
9093 {
9094         int i;
9095
9096         mutex_lock(&devlink->lock);
9097         for (i = policers_count - 1; i >= 0; i--)
9098                 devlink_trap_policer_unregister(devlink, &policers[i]);
9099         mutex_unlock(&devlink->lock);
9100 }
9101 EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
9102
9103 static void __devlink_compat_running_version(struct devlink *devlink,
9104                                              char *buf, size_t len)
9105 {
9106         const struct nlattr *nlattr;
9107         struct devlink_info_req req;
9108         struct sk_buff *msg;
9109         int rem, err;
9110
9111         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9112         if (!msg)
9113                 return;
9114
9115         req.msg = msg;
9116         err = devlink->ops->info_get(devlink, &req, NULL);
9117         if (err)
9118                 goto free_msg;
9119
9120         nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
9121                 const struct nlattr *kv;
9122                 int rem_kv;
9123
9124                 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
9125                         continue;
9126
9127                 nla_for_each_nested(kv, nlattr, rem_kv) {
9128                         if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
9129                                 continue;
9130
9131                         strlcat(buf, nla_data(kv), len);
9132                         strlcat(buf, " ", len);
9133                 }
9134         }
9135 free_msg:
9136         nlmsg_free(msg);
9137 }
9138
9139 void devlink_compat_running_version(struct net_device *dev,
9140                                     char *buf, size_t len)
9141 {
9142         struct devlink *devlink;
9143
9144         dev_hold(dev);
9145         rtnl_unlock();
9146
9147         devlink = netdev_to_devlink(dev);
9148         if (!devlink || !devlink->ops->info_get)
9149                 goto out;
9150
9151         mutex_lock(&devlink->lock);
9152         __devlink_compat_running_version(devlink, buf, len);
9153         mutex_unlock(&devlink->lock);
9154
9155 out:
9156         rtnl_lock();
9157         dev_put(dev);
9158 }
9159
9160 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
9161 {
9162         struct devlink *devlink;
9163         int ret;
9164
9165         dev_hold(dev);
9166         rtnl_unlock();
9167
9168         devlink = netdev_to_devlink(dev);
9169         if (!devlink || !devlink->ops->flash_update) {
9170                 ret = -EOPNOTSUPP;
9171                 goto out;
9172         }
9173
9174         mutex_lock(&devlink->lock);
9175         ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
9176         mutex_unlock(&devlink->lock);
9177
9178 out:
9179         rtnl_lock();
9180         dev_put(dev);
9181
9182         return ret;
9183 }
9184
9185 int devlink_compat_phys_port_name_get(struct net_device *dev,
9186                                       char *name, size_t len)
9187 {
9188         struct devlink_port *devlink_port;
9189
9190         /* RTNL mutex is held here which ensures that devlink_port
9191          * instance cannot disappear in the middle. No need to take
9192          * any devlink lock as only permanent values are accessed.
9193          */
9194         ASSERT_RTNL();
9195
9196         devlink_port = netdev_to_devlink_port(dev);
9197         if (!devlink_port)
9198                 return -EOPNOTSUPP;
9199
9200         return __devlink_port_phys_port_name_get(devlink_port, name, len);
9201 }
9202
9203 int devlink_compat_switch_id_get(struct net_device *dev,
9204                                  struct netdev_phys_item_id *ppid)
9205 {
9206         struct devlink_port *devlink_port;
9207
9208         /* Caller must hold RTNL mutex or reference to dev, which ensures that
9209          * devlink_port instance cannot disappear in the middle. No need to take
9210          * any devlink lock as only permanent values are accessed.
9211          */
9212         devlink_port = netdev_to_devlink_port(dev);
9213         if (!devlink_port || !devlink_port->attrs.switch_port)
9214                 return -EOPNOTSUPP;
9215
9216         memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
9217
9218         return 0;
9219 }
9220
9221 static void __net_exit devlink_pernet_pre_exit(struct net *net)
9222 {
9223         struct devlink *devlink;
9224         int err;
9225
9226         /* In case network namespace is getting destroyed, reload
9227          * all devlink instances from this namespace into init_net.
9228          */
9229         mutex_lock(&devlink_mutex);
9230         list_for_each_entry(devlink, &devlink_list, list) {
9231                 if (net_eq(devlink_net(devlink), net)) {
9232                         if (WARN_ON(!devlink_reload_supported(devlink)))
9233                                 continue;
9234                         err = devlink_reload(devlink, &init_net, NULL);
9235                         if (err && err != -EOPNOTSUPP)
9236                                 pr_warn("Failed to reload devlink instance into init_net\n");
9237                 }
9238         }
9239         mutex_unlock(&devlink_mutex);
9240 }
9241
9242 static struct pernet_operations devlink_pernet_ops __net_initdata = {
9243         .pre_exit = devlink_pernet_pre_exit,
9244 };
9245
9246 static int __init devlink_init(void)
9247 {
9248         int err;
9249
9250         err = genl_register_family(&devlink_nl_family);
9251         if (err)
9252                 goto out;
9253         err = register_pernet_subsys(&devlink_pernet_ops);
9254
9255 out:
9256         WARN_ON(err);
9257         return err;
9258 }
9259
9260 subsys_initcall(devlink_init);