net/core/devlink.c

   1 /*
   2  * net/core/devlink.c - Network physical/parent device Netlink interface
   3  *
   4  * Heavily inspired by net/wireless/
   5  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
   6  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/gfp.h>
  19 #include <linux/device.h>
  20 #include <linux/list.h>
  21 #include <linux/netdevice.h>
  22 #include <rdma/ib_verbs.h>
  23 #include <net/netlink.h>
  24 #include <net/genetlink.h>
  25 #include <net/rtnetlink.h>
  26 #include <net/net_namespace.h>
  27 #include <net/sock.h>
  28 #include <net/devlink.h>
  29 #define CREATE_TRACE_POINTS
  30 #include <trace/events/devlink.h>
  31
  32 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
  33         {
  34                 .name = "destination mac",
  35                 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
  36                 .bitwidth = 48,
  37         },
  38 };
  39
  40 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
  41         .name = "ethernet",
  42         .id = DEVLINK_DPIPE_HEADER_ETHERNET,
  43         .fields = devlink_dpipe_fields_ethernet,
  44         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
  45         .global = true,
  46 };
  47 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
  48
  49 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
  50         {
  51                 .name = "destination ip",
  52                 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
  53                 .bitwidth = 32,
  54         },
  55 };
  56
  57 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
  58         .name = "ipv4",
  59         .id = DEVLINK_DPIPE_HEADER_IPV4,
  60         .fields = devlink_dpipe_fields_ipv4,
  61         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
  62         .global = true,
  63 };
  64 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
  65
  66 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
  67         {
  68                 .name = "destination ip",
  69                 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
  70                 .bitwidth = 128,
  71         },
  72 };
  73
  74 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
  75         .name = "ipv6",
  76         .id = DEVLINK_DPIPE_HEADER_IPV6,
  77         .fields = devlink_dpipe_fields_ipv6,
  78         .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
  79         .global = true,
  80 };
  81 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
  82
  83 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
  84
  85 static LIST_HEAD(devlink_list);
  86
  87 /* devlink_mutex
  88  *
  89  * An overall lock guarding every operation coming from userspace.
  90  * It also guards devlink devices list and it is taken when
  91  * driver registers/unregisters it.
  92  */
  93 static DEFINE_MUTEX(devlink_mutex);
  94
  95 static struct net *devlink_net(const struct devlink *devlink)
  96 {
  97         return read_pnet(&devlink->_net);
  98 }
  99
 100 static void devlink_net_set(struct devlink *devlink, struct net *net)
 101 {
 102         write_pnet(&devlink->_net, net);
 103 }
 104
 105 static struct devlink *devlink_get_from_attrs(struct net *net,
 106                                               struct nlattr **attrs)
 107 {
 108         struct devlink *devlink;
 109         char *busname;
 110         char *devname;
 111
 112         if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
 113                 return ERR_PTR(-EINVAL);
 114
 115         busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
 116         devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
 117
 118         list_for_each_entry(devlink, &devlink_list, list) {
 119                 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
 120                     strcmp(dev_name(devlink->dev), devname) == 0 &&
 121                     net_eq(devlink_net(devlink), net))
 122                         return devlink;
 123         }
 124
 125         return ERR_PTR(-ENODEV);
 126 }
 127
 128 static struct devlink *devlink_get_from_info(struct genl_info *info)
 129 {
 130         return devlink_get_from_attrs(genl_info_net(info), info->attrs);
 131 }
 132
 133 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
 134                                                       int port_index)
 135 {
 136         struct devlink_port *devlink_port;
 137
 138         list_for_each_entry(devlink_port, &devlink->port_list, list) {
 139                 if (devlink_port->index == port_index)
 140                         return devlink_port;
 141         }
 142         return NULL;
 143 }
 144
 145 static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
 146 {
 147         return devlink_port_get_by_index(devlink, port_index);
 148 }
 149
 150 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
 151                                                         struct nlattr **attrs)
 152 {
 153         if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 154                 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 155                 struct devlink_port *devlink_port;
 156
 157                 devlink_port = devlink_port_get_by_index(devlink, port_index);
 158                 if (!devlink_port)
 159                         return ERR_PTR(-ENODEV);
 160                 return devlink_port;
 161         }
 162         return ERR_PTR(-EINVAL);
 163 }
 164
 165 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
 166                                                        struct genl_info *info)
 167 {
 168         return devlink_port_get_from_attrs(devlink, info->attrs);
 169 }
 170
 171 struct devlink_sb {
 172         struct list_head list;
 173         unsigned int index;
 174         u32 size;
 175         u16 ingress_pools_count;
 176         u16 egress_pools_count;
 177         u16 ingress_tc_count;
 178         u16 egress_tc_count;
 179 };
 180
 181 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
 182 {
 183         return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
 184 }
 185
 186 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
 187                                                   unsigned int sb_index)
 188 {
 189         struct devlink_sb *devlink_sb;
 190
 191         list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 192                 if (devlink_sb->index == sb_index)
 193                         return devlink_sb;
 194         }
 195         return NULL;
 196 }
 197
 198 static bool devlink_sb_index_exists(struct devlink *devlink,
 199                                     unsigned int sb_index)
 200 {
 201         return devlink_sb_get_by_index(devlink, sb_index);
 202 }
 203
 204 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
 205                                                     struct nlattr **attrs)
 206 {
 207         if (attrs[DEVLINK_ATTR_SB_INDEX]) {
 208                 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
 209                 struct devlink_sb *devlink_sb;
 210
 211                 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
 212                 if (!devlink_sb)
 213                         return ERR_PTR(-ENODEV);
 214                 return devlink_sb;
 215         }
 216         return ERR_PTR(-EINVAL);
 217 }
 218
 219 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
 220                                                    struct genl_info *info)
 221 {
 222         return devlink_sb_get_from_attrs(devlink, info->attrs);
 223 }
 224
 225 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
 226                                                 struct nlattr **attrs,
 227                                                 u16 *p_pool_index)
 228 {
 229         u16 val;
 230
 231         if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
 232                 return -EINVAL;
 233
 234         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
 235         if (val >= devlink_sb_pool_count(devlink_sb))
 236                 return -EINVAL;
 237         *p_pool_index = val;
 238         return 0;
 239 }
 240
 241 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
 242                                                struct genl_info *info,
 243                                                u16 *p_pool_index)
 244 {
 245         return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
 246                                                     p_pool_index);
 247 }
 248
 249 static int
 250 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
 251                                     enum devlink_sb_pool_type *p_pool_type)
 252 {
 253         u8 val;
 254
 255         if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
 256                 return -EINVAL;
 257
 258         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
 259         if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
 260             val != DEVLINK_SB_POOL_TYPE_EGRESS)
 261                 return -EINVAL;
 262         *p_pool_type = val;
 263         return 0;
 264 }
 265
 266 static int
 267 devlink_sb_pool_type_get_from_info(struct genl_info *info,
 268                                    enum devlink_sb_pool_type *p_pool_type)
 269 {
 270         return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
 271 }
 272
 273 static int
 274 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
 275                                   enum devlink_sb_threshold_type *p_th_type)
 276 {
 277         u8 val;
 278
 279         if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
 280                 return -EINVAL;
 281
 282         val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
 283         if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
 284             val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
 285                 return -EINVAL;
 286         *p_th_type = val;
 287         return 0;
 288 }
 289
 290 static int
 291 devlink_sb_th_type_get_from_info(struct genl_info *info,
 292                                  enum devlink_sb_threshold_type *p_th_type)
 293 {
 294         return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
 295 }
 296
 297 static int
 298 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
 299                                    struct nlattr **attrs,
 300                                    enum devlink_sb_pool_type pool_type,
 301                                    u16 *p_tc_index)
 302 {
 303         u16 val;
 304
 305         if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
 306                 return -EINVAL;
 307
 308         val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
 309         if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
 310             val >= devlink_sb->ingress_tc_count)
 311                 return -EINVAL;
 312         if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
 313             val >= devlink_sb->egress_tc_count)
 314                 return -EINVAL;
 315         *p_tc_index = val;
 316         return 0;
 317 }
 318
 319 static int
 320 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
 321                                   struct genl_info *info,
 322                                   enum devlink_sb_pool_type pool_type,
 323                                   u16 *p_tc_index)
 324 {
 325         return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
 326                                                   pool_type, p_tc_index);
 327 }
 328
 329 struct devlink_region {
 330         struct devlink *devlink;
 331         struct list_head list;
 332         const char *name;
 333         struct list_head snapshot_list;
 334         u32 max_snapshots;
 335         u32 cur_snapshots;
 336         u64 size;
 337 };
 338
 339 struct devlink_snapshot {
 340         struct list_head list;
 341         struct devlink_region *region;
 342         devlink_snapshot_data_dest_t *data_destructor;
 343         u64 data_len;
 344         u8 *data;
 345         u32 id;
 346 };
 347
 348 static struct devlink_region *
 349 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
 350 {
 351         struct devlink_region *region;
 352
 353         list_for_each_entry(region, &devlink->region_list, list)
 354                 if (!strcmp(region->name, region_name))
 355                         return region;
 356
 357         return NULL;
 358 }
 359
 360 static struct devlink_snapshot *
 361 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
 362 {
 363         struct devlink_snapshot *snapshot;
 364
 365         list_for_each_entry(snapshot, &region->snapshot_list, list)
 366                 if (snapshot->id == id)
 367                         return snapshot;
 368
 369         return NULL;
 370 }
 371
 372 static void devlink_region_snapshot_del(struct devlink_snapshot *snapshot)
 373 {
 374         snapshot->region->cur_snapshots--;
 375         list_del(&snapshot->list);
 376         (*snapshot->data_destructor)(snapshot->data);
 377         kfree(snapshot);
 378 }
 379
 380 #define DEVLINK_NL_FLAG_NEED_DEVLINK    BIT(0)
 381 #define DEVLINK_NL_FLAG_NEED_PORT       BIT(1)
 382 #define DEVLINK_NL_FLAG_NEED_SB         BIT(2)
 383
 384 /* The per devlink instance lock is taken by default in the pre-doit
 385  * operation, yet several commands do not require this. The global
 386  * devlink lock is taken and protects from disruption by user-calls.
 387  */
 388 #define DEVLINK_NL_FLAG_NO_LOCK         BIT(3)
 389
 390 static int devlink_nl_pre_doit(const struct genl_ops *ops,
 391                                struct sk_buff *skb, struct genl_info *info)
 392 {
 393         struct devlink *devlink;
 394         int err;
 395
 396         mutex_lock(&devlink_mutex);
 397         devlink = devlink_get_from_info(info);
 398         if (IS_ERR(devlink)) {
 399                 mutex_unlock(&devlink_mutex);
 400                 return PTR_ERR(devlink);
 401         }
 402         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 403                 mutex_lock(&devlink->lock);
 404         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
 405                 info->user_ptr[0] = devlink;
 406         } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
 407                 struct devlink_port *devlink_port;
 408
 409                 devlink_port = devlink_port_get_from_info(devlink, info);
 410                 if (IS_ERR(devlink_port)) {
 411                         err = PTR_ERR(devlink_port);
 412                         goto unlock;
 413                 }
 414                 info->user_ptr[0] = devlink_port;
 415         }
 416         if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
 417                 struct devlink_sb *devlink_sb;
 418
 419                 devlink_sb = devlink_sb_get_from_info(devlink, info);
 420                 if (IS_ERR(devlink_sb)) {
 421                         err = PTR_ERR(devlink_sb);
 422                         goto unlock;
 423                 }
 424                 info->user_ptr[1] = devlink_sb;
 425         }
 426         return 0;
 427
 428 unlock:
 429         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 430                 mutex_unlock(&devlink->lock);
 431         mutex_unlock(&devlink_mutex);
 432         return err;
 433 }
 434
 435 static void devlink_nl_post_doit(const struct genl_ops *ops,
 436                                  struct sk_buff *skb, struct genl_info *info)
 437 {
 438         struct devlink *devlink;
 439
 440         devlink = devlink_get_from_info(info);
 441         if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
 442                 mutex_unlock(&devlink->lock);
 443         mutex_unlock(&devlink_mutex);
 444 }
 445
 446 static struct genl_family devlink_nl_family;
 447
 448 enum devlink_multicast_groups {
 449         DEVLINK_MCGRP_CONFIG,
 450 };
 451
 452 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
 453         [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
 454 };
 455
 456 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
 457 {
 458         if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
 459                 return -EMSGSIZE;
 460         if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
 461                 return -EMSGSIZE;
 462         return 0;
 463 }
 464
 465 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
 466                            enum devlink_command cmd, u32 portid,
 467                            u32 seq, int flags)
 468 {
 469         void *hdr;
 470
 471         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 472         if (!hdr)
 473                 return -EMSGSIZE;
 474
 475         if (devlink_nl_put_handle(msg, devlink))
 476                 goto nla_put_failure;
 477
 478         genlmsg_end(msg, hdr);
 479         return 0;
 480
 481 nla_put_failure:
 482         genlmsg_cancel(msg, hdr);
 483         return -EMSGSIZE;
 484 }
 485
 486 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
 487 {
 488         struct sk_buff *msg;
 489         int err;
 490
 491         WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
 492
 493         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 494         if (!msg)
 495                 return;
 496
 497         err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
 498         if (err) {
 499                 nlmsg_free(msg);
 500                 return;
 501         }
 502
 503         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 504                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 505 }
 506
 507 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
 508                                      struct devlink_port *devlink_port)
 509 {
 510         struct devlink_port_attrs *attrs = &devlink_port->attrs;
 511
 512         if (!attrs->set)
 513                 return 0;
 514         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
 515                 return -EMSGSIZE;
 516         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, attrs->port_number))
 517                 return -EMSGSIZE;
 518         if (!attrs->split)
 519                 return 0;
 520         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, attrs->port_number))
 521                 return -EMSGSIZE;
 522         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
 523                         attrs->split_subport_number))
 524                 return -EMSGSIZE;
 525         return 0;
 526 }
 527
 528 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
 529                                 struct devlink_port *devlink_port,
 530                                 enum devlink_command cmd, u32 portid,
 531                                 u32 seq, int flags)
 532 {
 533         void *hdr;
 534
 535         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 536         if (!hdr)
 537                 return -EMSGSIZE;
 538
 539         if (devlink_nl_put_handle(msg, devlink))
 540                 goto nla_put_failure;
 541         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
 542                 goto nla_put_failure;
 543         if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
 544                 goto nla_put_failure;
 545         if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
 546             nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
 547                         devlink_port->desired_type))
 548                 goto nla_put_failure;
 549         if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
 550                 struct net_device *netdev = devlink_port->type_dev;
 551
 552                 if (netdev &&
 553                     (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
 554                                  netdev->ifindex) ||
 555                      nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
 556                                     netdev->name)))
 557                         goto nla_put_failure;
 558         }
 559         if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
 560                 struct ib_device *ibdev = devlink_port->type_dev;
 561
 562                 if (ibdev &&
 563                     nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
 564                                    ibdev->name))
 565                         goto nla_put_failure;
 566         }
 567         if (devlink_nl_port_attrs_put(msg, devlink_port))
 568                 goto nla_put_failure;
 569
 570         genlmsg_end(msg, hdr);
 571         return 0;
 572
 573 nla_put_failure:
 574         genlmsg_cancel(msg, hdr);
 575         return -EMSGSIZE;
 576 }
 577
 578 static void devlink_port_notify(struct devlink_port *devlink_port,
 579                                 enum devlink_command cmd)
 580 {
 581         struct devlink *devlink = devlink_port->devlink;
 582         struct sk_buff *msg;
 583         int err;
 584
 585         if (!devlink_port->registered)
 586                 return;
 587
 588         WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
 589
 590         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 591         if (!msg)
 592                 return;
 593
 594         err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
 595         if (err) {
 596                 nlmsg_free(msg);
 597                 return;
 598         }
 599
 600         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
 601                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 602 }
 603
 604 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
 605 {
 606         struct devlink *devlink = info->user_ptr[0];
 607         struct sk_buff *msg;
 608         int err;
 609
 610         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 611         if (!msg)
 612                 return -ENOMEM;
 613
 614         err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 615                               info->snd_portid, info->snd_seq, 0);
 616         if (err) {
 617                 nlmsg_free(msg);
 618                 return err;
 619         }
 620
 621         return genlmsg_reply(msg, info);
 622 }
 623
 624 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
 625                                      struct netlink_callback *cb)
 626 {
 627         struct devlink *devlink;
 628         int start = cb->args[0];
 629         int idx = 0;
 630         int err;
 631
 632         mutex_lock(&devlink_mutex);
 633         list_for_each_entry(devlink, &devlink_list, list) {
 634                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 635                         continue;
 636                 if (idx < start) {
 637                         idx++;
 638                         continue;
 639                 }
 640                 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
 641                                       NETLINK_CB(cb->skb).portid,
 642                                       cb->nlh->nlmsg_seq, NLM_F_MULTI);
 643                 if (err)
 644                         goto out;
 645                 idx++;
 646         }
 647 out:
 648         mutex_unlock(&devlink_mutex);
 649
 650         cb->args[0] = idx;
 651         return msg->len;
 652 }
 653
 654 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
 655                                         struct genl_info *info)
 656 {
 657         struct devlink_port *devlink_port = info->user_ptr[0];
 658         struct devlink *devlink = devlink_port->devlink;
 659         struct sk_buff *msg;
 660         int err;
 661
 662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 663         if (!msg)
 664                 return -ENOMEM;
 665
 666         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 667                                    DEVLINK_CMD_PORT_NEW,
 668                                    info->snd_portid, info->snd_seq, 0);
 669         if (err) {
 670                 nlmsg_free(msg);
 671                 return err;
 672         }
 673
 674         return genlmsg_reply(msg, info);
 675 }
 676
 677 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
 678                                           struct netlink_callback *cb)
 679 {
 680         struct devlink *devlink;
 681         struct devlink_port *devlink_port;
 682         int start = cb->args[0];
 683         int idx = 0;
 684         int err;
 685
 686         mutex_lock(&devlink_mutex);
 687         list_for_each_entry(devlink, &devlink_list, list) {
 688                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 689                         continue;
 690                 mutex_lock(&devlink->lock);
 691                 list_for_each_entry(devlink_port, &devlink->port_list, list) {
 692                         if (idx < start) {
 693                                 idx++;
 694                                 continue;
 695                         }
 696                         err = devlink_nl_port_fill(msg, devlink, devlink_port,
 697                                                    DEVLINK_CMD_NEW,
 698                                                    NETLINK_CB(cb->skb).portid,
 699                                                    cb->nlh->nlmsg_seq,
 700                                                    NLM_F_MULTI);
 701                         if (err) {
 702                                 mutex_unlock(&devlink->lock);
 703                                 goto out;
 704                         }
 705                         idx++;
 706                 }
 707                 mutex_unlock(&devlink->lock);
 708         }
 709 out:
 710         mutex_unlock(&devlink_mutex);
 711
 712         cb->args[0] = idx;
 713         return msg->len;
 714 }
 715
 716 static int devlink_port_type_set(struct devlink *devlink,
 717                                  struct devlink_port *devlink_port,
 718                                  enum devlink_port_type port_type)
 719
 720 {
 721         int err;
 722
 723         if (devlink->ops && devlink->ops->port_type_set) {
 724                 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
 725                         return -EINVAL;
 726                 if (port_type == devlink_port->type)
 727                         return 0;
 728                 err = devlink->ops->port_type_set(devlink_port, port_type);
 729                 if (err)
 730                         return err;
 731                 devlink_port->desired_type = port_type;
 732                 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
 733                 return 0;
 734         }
 735         return -EOPNOTSUPP;
 736 }
 737
 738 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 739                                         struct genl_info *info)
 740 {
 741         struct devlink_port *devlink_port = info->user_ptr[0];
 742         struct devlink *devlink = devlink_port->devlink;
 743         int err;
 744
 745         if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
 746                 enum devlink_port_type port_type;
 747
 748                 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
 749                 err = devlink_port_type_set(devlink, devlink_port, port_type);
 750                 if (err)
 751                         return err;
 752         }
 753         return 0;
 754 }
 755
 756 static int devlink_port_split(struct devlink *devlink, u32 port_index,
 757                               u32 count, struct netlink_ext_ack *extack)
 758
 759 {
 760         if (devlink->ops && devlink->ops->port_split)
 761                 return devlink->ops->port_split(devlink, port_index, count,
 762                                                 extack);
 763         return -EOPNOTSUPP;
 764 }
 765
 766 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 767                                           struct genl_info *info)
 768 {
 769         struct devlink *devlink = info->user_ptr[0];
 770         u32 port_index;
 771         u32 count;
 772
 773         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
 774             !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 775                 return -EINVAL;
 776
 777         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 778         count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 779         return devlink_port_split(devlink, port_index, count, info->extack);
 780 }
 781
 782 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
 783                                 struct netlink_ext_ack *extack)
 784
 785 {
 786         if (devlink->ops && devlink->ops->port_unsplit)
 787                 return devlink->ops->port_unsplit(devlink, port_index, extack);
 788         return -EOPNOTSUPP;
 789 }
 790
 791 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 792                                             struct genl_info *info)
 793 {
 794         struct devlink *devlink = info->user_ptr[0];
 795         u32 port_index;
 796
 797         if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
 798                 return -EINVAL;
 799
 800         port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 801         return devlink_port_unsplit(devlink, port_index, info->extack);
 802 }
 803
 804 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
 805                               struct devlink_sb *devlink_sb,
 806                               enum devlink_command cmd, u32 portid,
 807                               u32 seq, int flags)
 808 {
 809         void *hdr;
 810
 811         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 812         if (!hdr)
 813                 return -EMSGSIZE;
 814
 815         if (devlink_nl_put_handle(msg, devlink))
 816                 goto nla_put_failure;
 817         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 818                 goto nla_put_failure;
 819         if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
 820                 goto nla_put_failure;
 821         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
 822                         devlink_sb->ingress_pools_count))
 823                 goto nla_put_failure;
 824         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
 825                         devlink_sb->egress_pools_count))
 826                 goto nla_put_failure;
 827         if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
 828                         devlink_sb->ingress_tc_count))
 829                 goto nla_put_failure;
 830         if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
 831                         devlink_sb->egress_tc_count))
 832                 goto nla_put_failure;
 833
 834         genlmsg_end(msg, hdr);
 835         return 0;
 836
 837 nla_put_failure:
 838         genlmsg_cancel(msg, hdr);
 839         return -EMSGSIZE;
 840 }
 841
 842 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
 843                                       struct genl_info *info)
 844 {
 845         struct devlink *devlink = info->user_ptr[0];
 846         struct devlink_sb *devlink_sb = info->user_ptr[1];
 847         struct sk_buff *msg;
 848         int err;
 849
 850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 851         if (!msg)
 852                 return -ENOMEM;
 853
 854         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 855                                  DEVLINK_CMD_SB_NEW,
 856                                  info->snd_portid, info->snd_seq, 0);
 857         if (err) {
 858                 nlmsg_free(msg);
 859                 return err;
 860         }
 861
 862         return genlmsg_reply(msg, info);
 863 }
 864
 865 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
 866                                         struct netlink_callback *cb)
 867 {
 868         struct devlink *devlink;
 869         struct devlink_sb *devlink_sb;
 870         int start = cb->args[0];
 871         int idx = 0;
 872         int err;
 873
 874         mutex_lock(&devlink_mutex);
 875         list_for_each_entry(devlink, &devlink_list, list) {
 876                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
 877                         continue;
 878                 mutex_lock(&devlink->lock);
 879                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
 880                         if (idx < start) {
 881                                 idx++;
 882                                 continue;
 883                         }
 884                         err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
 885                                                  DEVLINK_CMD_SB_NEW,
 886                                                  NETLINK_CB(cb->skb).portid,
 887                                                  cb->nlh->nlmsg_seq,
 888                                                  NLM_F_MULTI);
 889                         if (err) {
 890                                 mutex_unlock(&devlink->lock);
 891                                 goto out;
 892                         }
 893                         idx++;
 894                 }
 895                 mutex_unlock(&devlink->lock);
 896         }
 897 out:
 898         mutex_unlock(&devlink_mutex);
 899
 900         cb->args[0] = idx;
 901         return msg->len;
 902 }
 903
 904 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
 905                                    struct devlink_sb *devlink_sb,
 906                                    u16 pool_index, enum devlink_command cmd,
 907                                    u32 portid, u32 seq, int flags)
 908 {
 909         struct devlink_sb_pool_info pool_info;
 910         void *hdr;
 911         int err;
 912
 913         err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
 914                                         pool_index, &pool_info);
 915         if (err)
 916                 return err;
 917
 918         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 919         if (!hdr)
 920                 return -EMSGSIZE;
 921
 922         if (devlink_nl_put_handle(msg, devlink))
 923                 goto nla_put_failure;
 924         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
 925                 goto nla_put_failure;
 926         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
 927                 goto nla_put_failure;
 928         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
 929                 goto nla_put_failure;
 930         if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
 931                 goto nla_put_failure;
 932         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
 933                        pool_info.threshold_type))
 934                 goto nla_put_failure;
 935
 936         genlmsg_end(msg, hdr);
 937         return 0;
 938
 939 nla_put_failure:
 940         genlmsg_cancel(msg, hdr);
 941         return -EMSGSIZE;
 942 }
 943
 944 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
 945                                            struct genl_info *info)
 946 {
 947         struct devlink *devlink = info->user_ptr[0];
 948         struct devlink_sb *devlink_sb = info->user_ptr[1];
 949         struct sk_buff *msg;
 950         u16 pool_index;
 951         int err;
 952
 953         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
 954                                                   &pool_index);
 955         if (err)
 956                 return err;
 957
 958         if (!devlink->ops || !devlink->ops->sb_pool_get)
 959                 return -EOPNOTSUPP;
 960
 961         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 962         if (!msg)
 963                 return -ENOMEM;
 964
 965         err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
 966                                       DEVLINK_CMD_SB_POOL_NEW,
 967                                       info->snd_portid, info->snd_seq, 0);
 968         if (err) {
 969                 nlmsg_free(msg);
 970                 return err;
 971         }
 972
 973         return genlmsg_reply(msg, info);
 974 }
 975
 976 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
 977                                 struct devlink *devlink,
 978                                 struct devlink_sb *devlink_sb,
 979                                 u32 portid, u32 seq)
 980 {
 981         u16 pool_count = devlink_sb_pool_count(devlink_sb);
 982         u16 pool_index;
 983         int err;
 984
 985         for (pool_index = 0; pool_index < pool_count; pool_index++) {
 986                 if (*p_idx < start) {
 987                         (*p_idx)++;
 988                         continue;
 989                 }
 990                 err = devlink_nl_sb_pool_fill(msg, devlink,
 991                                               devlink_sb,
 992                                               pool_index,
 993                                               DEVLINK_CMD_SB_POOL_NEW,
 994                                               portid, seq, NLM_F_MULTI);
 995                 if (err)
 996                         return err;
 997                 (*p_idx)++;
 998         }
 999         return 0;
1000 }
1001
1002 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1003                                              struct netlink_callback *cb)
1004 {
1005         struct devlink *devlink;
1006         struct devlink_sb *devlink_sb;
1007         int start = cb->args[0];
1008         int idx = 0;
1009         int err;
1010
1011         mutex_lock(&devlink_mutex);
1012         list_for_each_entry(devlink, &devlink_list, list) {
1013                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1014                     !devlink->ops || !devlink->ops->sb_pool_get)
1015                         continue;
1016                 mutex_lock(&devlink->lock);
1017                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1018                         err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1019                                                    devlink_sb,
1020                                                    NETLINK_CB(cb->skb).portid,
1021                                                    cb->nlh->nlmsg_seq);
1022                         if (err && err != -EOPNOTSUPP) {
1023                                 mutex_unlock(&devlink->lock);
1024                                 goto out;
1025                         }
1026                 }
1027                 mutex_unlock(&devlink->lock);
1028         }
1029 out:
1030         mutex_unlock(&devlink_mutex);
1031
1032         cb->args[0] = idx;
1033         return msg->len;
1034 }
1035
1036 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1037                                u16 pool_index, u32 size,
1038                                enum devlink_sb_threshold_type threshold_type)
1039
1040 {
1041         const struct devlink_ops *ops = devlink->ops;
1042
1043         if (ops && ops->sb_pool_set)
1044                 return ops->sb_pool_set(devlink, sb_index, pool_index,
1045                                         size, threshold_type);
1046         return -EOPNOTSUPP;
1047 }
1048
1049 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1050                                            struct genl_info *info)
1051 {
1052         struct devlink *devlink = info->user_ptr[0];
1053         struct devlink_sb *devlink_sb = info->user_ptr[1];
1054         enum devlink_sb_threshold_type threshold_type;
1055         u16 pool_index;
1056         u32 size;
1057         int err;
1058
1059         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1060                                                   &pool_index);
1061         if (err)
1062                 return err;
1063
1064         err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1065         if (err)
1066                 return err;
1067
1068         if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1069                 return -EINVAL;
1070
1071         size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1072         return devlink_sb_pool_set(devlink, devlink_sb->index,
1073                                    pool_index, size, threshold_type);
1074 }
1075
1076 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1077                                         struct devlink *devlink,
1078                                         struct devlink_port *devlink_port,
1079                                         struct devlink_sb *devlink_sb,
1080                                         u16 pool_index,
1081                                         enum devlink_command cmd,
1082                                         u32 portid, u32 seq, int flags)
1083 {
1084         const struct devlink_ops *ops = devlink->ops;
1085         u32 threshold;
1086         void *hdr;
1087         int err;
1088
1089         err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1090                                     pool_index, &threshold);
1091         if (err)
1092                 return err;
1093
1094         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1095         if (!hdr)
1096                 return -EMSGSIZE;
1097
1098         if (devlink_nl_put_handle(msg, devlink))
1099                 goto nla_put_failure;
1100         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1101                 goto nla_put_failure;
1102         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1103                 goto nla_put_failure;
1104         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1105                 goto nla_put_failure;
1106         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1107                 goto nla_put_failure;
1108
1109         if (ops->sb_occ_port_pool_get) {
1110                 u32 cur;
1111                 u32 max;
1112
1113                 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1114                                                 pool_index, &cur, &max);
1115                 if (err && err != -EOPNOTSUPP)
1116                         return err;
1117                 if (!err) {
1118                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1119                                 goto nla_put_failure;
1120                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1121                                 goto nla_put_failure;
1122                 }
1123         }
1124
1125         genlmsg_end(msg, hdr);
1126         return 0;
1127
1128 nla_put_failure:
1129         genlmsg_cancel(msg, hdr);
1130         return -EMSGSIZE;
1131 }
1132
1133 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1134                                                 struct genl_info *info)
1135 {
1136         struct devlink_port *devlink_port = info->user_ptr[0];
1137         struct devlink *devlink = devlink_port->devlink;
1138         struct devlink_sb *devlink_sb = info->user_ptr[1];
1139         struct sk_buff *msg;
1140         u16 pool_index;
1141         int err;
1142
1143         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1144                                                   &pool_index);
1145         if (err)
1146                 return err;
1147
1148         if (!devlink->ops || !devlink->ops->sb_port_pool_get)
1149                 return -EOPNOTSUPP;
1150
1151         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1152         if (!msg)
1153                 return -ENOMEM;
1154
1155         err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1156                                            devlink_sb, pool_index,
1157                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1158                                            info->snd_portid, info->snd_seq, 0);
1159         if (err) {
1160                 nlmsg_free(msg);
1161                 return err;
1162         }
1163
1164         return genlmsg_reply(msg, info);
1165 }
1166
1167 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1168                                      struct devlink *devlink,
1169                                      struct devlink_sb *devlink_sb,
1170                                      u32 portid, u32 seq)
1171 {
1172         struct devlink_port *devlink_port;
1173         u16 pool_count = devlink_sb_pool_count(devlink_sb);
1174         u16 pool_index;
1175         int err;
1176
1177         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1178                 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1179                         if (*p_idx < start) {
1180                                 (*p_idx)++;
1181                                 continue;
1182                         }
1183                         err = devlink_nl_sb_port_pool_fill(msg, devlink,
1184                                                            devlink_port,
1185                                                            devlink_sb,
1186                                                            pool_index,
1187                                                            DEVLINK_CMD_SB_PORT_POOL_NEW,
1188                                                            portid, seq,
1189                                                            NLM_F_MULTI);
1190                         if (err)
1191                                 return err;
1192                         (*p_idx)++;
1193                 }
1194         }
1195         return 0;
1196 }
1197
1198 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1199                                                   struct netlink_callback *cb)
1200 {
1201         struct devlink *devlink;
1202         struct devlink_sb *devlink_sb;
1203         int start = cb->args[0];
1204         int idx = 0;
1205         int err;
1206
1207         mutex_lock(&devlink_mutex);
1208         list_for_each_entry(devlink, &devlink_list, list) {
1209                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1210                     !devlink->ops || !devlink->ops->sb_port_pool_get)
1211                         continue;
1212                 mutex_lock(&devlink->lock);
1213                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1214                         err = __sb_port_pool_get_dumpit(msg, start, &idx,
1215                                                         devlink, devlink_sb,
1216                                                         NETLINK_CB(cb->skb).portid,
1217                                                         cb->nlh->nlmsg_seq);
1218                         if (err && err != -EOPNOTSUPP) {
1219                                 mutex_unlock(&devlink->lock);
1220                                 goto out;
1221                         }
1222                 }
1223                 mutex_unlock(&devlink->lock);
1224         }
1225 out:
1226         mutex_unlock(&devlink_mutex);
1227
1228         cb->args[0] = idx;
1229         return msg->len;
1230 }
1231
1232 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1233                                     unsigned int sb_index, u16 pool_index,
1234                                     u32 threshold)
1235
1236 {
1237         const struct devlink_ops *ops = devlink_port->devlink->ops;
1238
1239         if (ops && ops->sb_port_pool_set)
1240                 return ops->sb_port_pool_set(devlink_port, sb_index,
1241                                              pool_index, threshold);
1242         return -EOPNOTSUPP;
1243 }
1244
1245 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1246                                                 struct genl_info *info)
1247 {
1248         struct devlink_port *devlink_port = info->user_ptr[0];
1249         struct devlink_sb *devlink_sb = info->user_ptr[1];
1250         u16 pool_index;
1251         u32 threshold;
1252         int err;
1253
1254         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1255                                                   &pool_index);
1256         if (err)
1257                 return err;
1258
1259         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1260                 return -EINVAL;
1261
1262         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1263         return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1264                                         pool_index, threshold);
1265 }
1266
1267 static int
1268 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1269                                 struct devlink_port *devlink_port,
1270                                 struct devlink_sb *devlink_sb, u16 tc_index,
1271                                 enum devlink_sb_pool_type pool_type,
1272                                 enum devlink_command cmd,
1273                                 u32 portid, u32 seq, int flags)
1274 {
1275         const struct devlink_ops *ops = devlink->ops;
1276         u16 pool_index;
1277         u32 threshold;
1278         void *hdr;
1279         int err;
1280
1281         err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1282                                        tc_index, pool_type,
1283                                        &pool_index, &threshold);
1284         if (err)
1285                 return err;
1286
1287         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1288         if (!hdr)
1289                 return -EMSGSIZE;
1290
1291         if (devlink_nl_put_handle(msg, devlink))
1292                 goto nla_put_failure;
1293         if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1294                 goto nla_put_failure;
1295         if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1296                 goto nla_put_failure;
1297         if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1298                 goto nla_put_failure;
1299         if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1300                 goto nla_put_failure;
1301         if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1302                 goto nla_put_failure;
1303         if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1304                 goto nla_put_failure;
1305
1306         if (ops->sb_occ_tc_port_bind_get) {
1307                 u32 cur;
1308                 u32 max;
1309
1310                 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1311                                                    devlink_sb->index,
1312                                                    tc_index, pool_type,
1313                                                    &cur, &max);
1314                 if (err && err != -EOPNOTSUPP)
1315                         return err;
1316                 if (!err) {
1317                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1318                                 goto nla_put_failure;
1319                         if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1320                                 goto nla_put_failure;
1321                 }
1322         }
1323
1324         genlmsg_end(msg, hdr);
1325         return 0;
1326
1327 nla_put_failure:
1328         genlmsg_cancel(msg, hdr);
1329         return -EMSGSIZE;
1330 }
1331
1332 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1333                                                    struct genl_info *info)
1334 {
1335         struct devlink_port *devlink_port = info->user_ptr[0];
1336         struct devlink *devlink = devlink_port->devlink;
1337         struct devlink_sb *devlink_sb = info->user_ptr[1];
1338         struct sk_buff *msg;
1339         enum devlink_sb_pool_type pool_type;
1340         u16 tc_index;
1341         int err;
1342
1343         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1344         if (err)
1345                 return err;
1346
1347         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1348                                                 pool_type, &tc_index);
1349         if (err)
1350                 return err;
1351
1352         if (!devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1353                 return -EOPNOTSUPP;
1354
1355         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1356         if (!msg)
1357                 return -ENOMEM;
1358
1359         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1360                                               devlink_sb, tc_index, pool_type,
1361                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1362                                               info->snd_portid,
1363                                               info->snd_seq, 0);
1364         if (err) {
1365                 nlmsg_free(msg);
1366                 return err;
1367         }
1368
1369         return genlmsg_reply(msg, info);
1370 }
1371
1372 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1373                                         int start, int *p_idx,
1374                                         struct devlink *devlink,
1375                                         struct devlink_sb *devlink_sb,
1376                                         u32 portid, u32 seq)
1377 {
1378         struct devlink_port *devlink_port;
1379         u16 tc_index;
1380         int err;
1381
1382         list_for_each_entry(devlink_port, &devlink->port_list, list) {
1383                 for (tc_index = 0;
1384                      tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1385                         if (*p_idx < start) {
1386                                 (*p_idx)++;
1387                                 continue;
1388                         }
1389                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1390                                                               devlink_port,
1391                                                               devlink_sb,
1392                                                               tc_index,
1393                                                               DEVLINK_SB_POOL_TYPE_INGRESS,
1394                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1395                                                               portid, seq,
1396                                                               NLM_F_MULTI);
1397                         if (err)
1398                                 return err;
1399                         (*p_idx)++;
1400                 }
1401                 for (tc_index = 0;
1402                      tc_index < devlink_sb->egress_tc_count; tc_index++) {
1403                         if (*p_idx < start) {
1404                                 (*p_idx)++;
1405                                 continue;
1406                         }
1407                         err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1408                                                               devlink_port,
1409                                                               devlink_sb,
1410                                                               tc_index,
1411                                                               DEVLINK_SB_POOL_TYPE_EGRESS,
1412                                                               DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1413                                                               portid, seq,
1414                                                               NLM_F_MULTI);
1415                         if (err)
1416                                 return err;
1417                         (*p_idx)++;
1418                 }
1419         }
1420         return 0;
1421 }
1422
1423 static int
1424 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1425                                           struct netlink_callback *cb)
1426 {
1427         struct devlink *devlink;
1428         struct devlink_sb *devlink_sb;
1429         int start = cb->args[0];
1430         int idx = 0;
1431         int err;
1432
1433         mutex_lock(&devlink_mutex);
1434         list_for_each_entry(devlink, &devlink_list, list) {
1435                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1436                     !devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1437                         continue;
1438
1439                 mutex_lock(&devlink->lock);
1440                 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1441                         err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1442                                                            devlink,
1443                                                            devlink_sb,
1444                                                            NETLINK_CB(cb->skb).portid,
1445                                                            cb->nlh->nlmsg_seq);
1446                         if (err && err != -EOPNOTSUPP) {
1447                                 mutex_unlock(&devlink->lock);
1448                                 goto out;
1449                         }
1450                 }
1451                 mutex_unlock(&devlink->lock);
1452         }
1453 out:
1454         mutex_unlock(&devlink_mutex);
1455
1456         cb->args[0] = idx;
1457         return msg->len;
1458 }
1459
1460 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1461                                        unsigned int sb_index, u16 tc_index,
1462                                        enum devlink_sb_pool_type pool_type,
1463                                        u16 pool_index, u32 threshold)
1464
1465 {
1466         const struct devlink_ops *ops = devlink_port->devlink->ops;
1467
1468         if (ops && ops->sb_tc_pool_bind_set)
1469                 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1470                                                 tc_index, pool_type,
1471                                                 pool_index, threshold);
1472         return -EOPNOTSUPP;
1473 }
1474
1475 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1476                                                    struct genl_info *info)
1477 {
1478         struct devlink_port *devlink_port = info->user_ptr[0];
1479         struct devlink_sb *devlink_sb = info->user_ptr[1];
1480         enum devlink_sb_pool_type pool_type;
1481         u16 tc_index;
1482         u16 pool_index;
1483         u32 threshold;
1484         int err;
1485
1486         err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1487         if (err)
1488                 return err;
1489
1490         err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1491                                                 pool_type, &tc_index);
1492         if (err)
1493                 return err;
1494
1495         err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1496                                                   &pool_index);
1497         if (err)
1498                 return err;
1499
1500         if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1501                 return -EINVAL;
1502
1503         threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1504         return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1505                                            tc_index, pool_type,
1506                                            pool_index, threshold);
1507 }
1508
1509 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1510                                                struct genl_info *info)
1511 {
1512         struct devlink *devlink = info->user_ptr[0];
1513         struct devlink_sb *devlink_sb = info->user_ptr[1];
1514         const struct devlink_ops *ops = devlink->ops;
1515
1516         if (ops && ops->sb_occ_snapshot)
1517                 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1518         return -EOPNOTSUPP;
1519 }
1520
1521 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1522                                                 struct genl_info *info)
1523 {
1524         struct devlink *devlink = info->user_ptr[0];
1525         struct devlink_sb *devlink_sb = info->user_ptr[1];
1526         const struct devlink_ops *ops = devlink->ops;
1527
1528         if (ops && ops->sb_occ_max_clear)
1529                 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1530         return -EOPNOTSUPP;
1531 }
1532
1533 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1534                                    enum devlink_command cmd, u32 portid,
1535                                    u32 seq, int flags)
1536 {
1537         const struct devlink_ops *ops = devlink->ops;
1538         u8 inline_mode, encap_mode;
1539         void *hdr;
1540         int err = 0;
1541         u16 mode;
1542
1543         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1544         if (!hdr)
1545                 return -EMSGSIZE;
1546
1547         err = devlink_nl_put_handle(msg, devlink);
1548         if (err)
1549                 goto nla_put_failure;
1550
1551         if (ops->eswitch_mode_get) {
1552                 err = ops->eswitch_mode_get(devlink, &mode);
1553                 if (err)
1554                         goto nla_put_failure;
1555                 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1556                 if (err)
1557                         goto nla_put_failure;
1558         }
1559
1560         if (ops->eswitch_inline_mode_get) {
1561                 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1562                 if (err)
1563                         goto nla_put_failure;
1564                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1565                                  inline_mode);
1566                 if (err)
1567                         goto nla_put_failure;
1568         }
1569
1570         if (ops->eswitch_encap_mode_get) {
1571                 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1572                 if (err)
1573                         goto nla_put_failure;
1574                 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1575                 if (err)
1576                         goto nla_put_failure;
1577         }
1578
1579         genlmsg_end(msg, hdr);
1580         return 0;
1581
1582 nla_put_failure:
1583         genlmsg_cancel(msg, hdr);
1584         return err;
1585 }
1586
1587 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1588                                            struct genl_info *info)
1589 {
1590         struct devlink *devlink = info->user_ptr[0];
1591         const struct devlink_ops *ops = devlink->ops;
1592         struct sk_buff *msg;
1593         int err;
1594
1595         if (!ops)
1596                 return -EOPNOTSUPP;
1597
1598         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1599         if (!msg)
1600                 return -ENOMEM;
1601
1602         err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1603                                       info->snd_portid, info->snd_seq, 0);
1604
1605         if (err) {
1606                 nlmsg_free(msg);
1607                 return err;
1608         }
1609
1610         return genlmsg_reply(msg, info);
1611 }
1612
1613 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1614                                            struct genl_info *info)
1615 {
1616         struct devlink *devlink = info->user_ptr[0];
1617         const struct devlink_ops *ops = devlink->ops;
1618         u8 inline_mode, encap_mode;
1619         int err = 0;
1620         u16 mode;
1621
1622         if (!ops)
1623                 return -EOPNOTSUPP;
1624
1625         if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1626                 if (!ops->eswitch_mode_set)
1627                         return -EOPNOTSUPP;
1628                 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1629                 err = ops->eswitch_mode_set(devlink, mode, info->extack);
1630                 if (err)
1631                         return err;
1632         }
1633
1634         if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1635                 if (!ops->eswitch_inline_mode_set)
1636                         return -EOPNOTSUPP;
1637                 inline_mode = nla_get_u8(
1638                                 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1639                 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
1640                                                    info->extack);
1641                 if (err)
1642                         return err;
1643         }
1644
1645         if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1646                 if (!ops->eswitch_encap_mode_set)
1647                         return -EOPNOTSUPP;
1648                 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1649                 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
1650                                                   info->extack);
1651                 if (err)
1652                         return err;
1653         }
1654
1655         return 0;
1656 }
1657
1658 int devlink_dpipe_match_put(struct sk_buff *skb,
1659                             struct devlink_dpipe_match *match)
1660 {
1661         struct devlink_dpipe_header *header = match->header;
1662         struct devlink_dpipe_field *field = &header->fields[match->field_id];
1663         struct nlattr *match_attr;
1664
1665         match_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_MATCH);
1666         if (!match_attr)
1667                 return -EMSGSIZE;
1668
1669         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1670             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1671             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1672             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1673             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1674                 goto nla_put_failure;
1675
1676         nla_nest_end(skb, match_attr);
1677         return 0;
1678
1679 nla_put_failure:
1680         nla_nest_cancel(skb, match_attr);
1681         return -EMSGSIZE;
1682 }
1683 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1684
1685 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1686                                      struct sk_buff *skb)
1687 {
1688         struct nlattr *matches_attr;
1689
1690         matches_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1691         if (!matches_attr)
1692                 return -EMSGSIZE;
1693
1694         if (table->table_ops->matches_dump(table->priv, skb))
1695                 goto nla_put_failure;
1696
1697         nla_nest_end(skb, matches_attr);
1698         return 0;
1699
1700 nla_put_failure:
1701         nla_nest_cancel(skb, matches_attr);
1702         return -EMSGSIZE;
1703 }
1704
1705 int devlink_dpipe_action_put(struct sk_buff *skb,
1706                              struct devlink_dpipe_action *action)
1707 {
1708         struct devlink_dpipe_header *header = action->header;
1709         struct devlink_dpipe_field *field = &header->fields[action->field_id];
1710         struct nlattr *action_attr;
1711
1712         action_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ACTION);
1713         if (!action_attr)
1714                 return -EMSGSIZE;
1715
1716         if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1717             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1718             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1719             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1720             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1721                 goto nla_put_failure;
1722
1723         nla_nest_end(skb, action_attr);
1724         return 0;
1725
1726 nla_put_failure:
1727         nla_nest_cancel(skb, action_attr);
1728         return -EMSGSIZE;
1729 }
1730 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1731
1732 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1733                                      struct sk_buff *skb)
1734 {
1735         struct nlattr *actions_attr;
1736
1737         actions_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1738         if (!actions_attr)
1739                 return -EMSGSIZE;
1740
1741         if (table->table_ops->actions_dump(table->priv, skb))
1742                 goto nla_put_failure;
1743
1744         nla_nest_end(skb, actions_attr);
1745         return 0;
1746
1747 nla_put_failure:
1748         nla_nest_cancel(skb, actions_attr);
1749         return -EMSGSIZE;
1750 }
1751
1752 static int devlink_dpipe_table_put(struct sk_buff *skb,
1753                                    struct devlink_dpipe_table *table)
1754 {
1755         struct nlattr *table_attr;
1756         u64 table_size;
1757
1758         table_size = table->table_ops->size_get(table->priv);
1759         table_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE);
1760         if (!table_attr)
1761                 return -EMSGSIZE;
1762
1763         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1764             nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1765                               DEVLINK_ATTR_PAD))
1766                 goto nla_put_failure;
1767         if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1768                        table->counters_enabled))
1769                 goto nla_put_failure;
1770
1771         if (table->resource_valid) {
1772                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1773                                       table->resource_id, DEVLINK_ATTR_PAD) ||
1774                     nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1775                                       table->resource_units, DEVLINK_ATTR_PAD))
1776                         goto nla_put_failure;
1777         }
1778         if (devlink_dpipe_matches_put(table, skb))
1779                 goto nla_put_failure;
1780
1781         if (devlink_dpipe_actions_put(table, skb))
1782                 goto nla_put_failure;
1783
1784         nla_nest_end(skb, table_attr);
1785         return 0;
1786
1787 nla_put_failure:
1788         nla_nest_cancel(skb, table_attr);
1789         return -EMSGSIZE;
1790 }
1791
1792 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1793                                             struct genl_info *info)
1794 {
1795         int err;
1796
1797         if (*pskb) {
1798                 err = genlmsg_reply(*pskb, info);
1799                 if (err)
1800                         return err;
1801         }
1802         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1803         if (!*pskb)
1804                 return -ENOMEM;
1805         return 0;
1806 }
1807
1808 static int devlink_dpipe_tables_fill(struct genl_info *info,
1809                                      enum devlink_command cmd, int flags,
1810                                      struct list_head *dpipe_tables,
1811                                      const char *table_name)
1812 {
1813         struct devlink *devlink = info->user_ptr[0];
1814         struct devlink_dpipe_table *table;
1815         struct nlattr *tables_attr;
1816         struct sk_buff *skb = NULL;
1817         struct nlmsghdr *nlh;
1818         bool incomplete;
1819         void *hdr;
1820         int i;
1821         int err;
1822
1823         table = list_first_entry(dpipe_tables,
1824                                  struct devlink_dpipe_table, list);
1825 start_again:
1826         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1827         if (err)
1828                 return err;
1829
1830         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1831                           &devlink_nl_family, NLM_F_MULTI, cmd);
1832         if (!hdr) {
1833                 nlmsg_free(skb);
1834                 return -EMSGSIZE;
1835         }
1836
1837         if (devlink_nl_put_handle(skb, devlink))
1838                 goto nla_put_failure;
1839         tables_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLES);
1840         if (!tables_attr)
1841                 goto nla_put_failure;
1842
1843         i = 0;
1844         incomplete = false;
1845         list_for_each_entry_from(table, dpipe_tables, list) {
1846                 if (!table_name) {
1847                         err = devlink_dpipe_table_put(skb, table);
1848                         if (err) {
1849                                 if (!i)
1850                                         goto err_table_put;
1851                                 incomplete = true;
1852                                 break;
1853                         }
1854                 } else {
1855                         if (!strcmp(table->name, table_name)) {
1856                                 err = devlink_dpipe_table_put(skb, table);
1857                                 if (err)
1858                                         break;
1859                         }
1860                 }
1861                 i++;
1862         }
1863
1864         nla_nest_end(skb, tables_attr);
1865         genlmsg_end(skb, hdr);
1866         if (incomplete)
1867                 goto start_again;
1868
1869 send_done:
1870         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1871                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
1872         if (!nlh) {
1873                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1874                 if (err)
1875                         return err;
1876                 goto send_done;
1877         }
1878
1879         return genlmsg_reply(skb, info);
1880
1881 nla_put_failure:
1882         err = -EMSGSIZE;
1883 err_table_put:
1884         nlmsg_free(skb);
1885         return err;
1886 }
1887
1888 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1889                                           struct genl_info *info)
1890 {
1891         struct devlink *devlink = info->user_ptr[0];
1892         const char *table_name =  NULL;
1893
1894         if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1895                 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1896
1897         return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1898                                          &devlink->dpipe_table_list,
1899                                          table_name);
1900 }
1901
1902 static int devlink_dpipe_value_put(struct sk_buff *skb,
1903                                    struct devlink_dpipe_value *value)
1904 {
1905         if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1906                     value->value_size, value->value))
1907                 return -EMSGSIZE;
1908         if (value->mask)
1909                 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1910                             value->value_size, value->mask))
1911                         return -EMSGSIZE;
1912         if (value->mapping_valid)
1913                 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1914                                 value->mapping_value))
1915                         return -EMSGSIZE;
1916         return 0;
1917 }
1918
1919 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1920                                           struct devlink_dpipe_value *value)
1921 {
1922         if (!value->action)
1923                 return -EINVAL;
1924         if (devlink_dpipe_action_put(skb, value->action))
1925                 return -EMSGSIZE;
1926         if (devlink_dpipe_value_put(skb, value))
1927                 return -EMSGSIZE;
1928         return 0;
1929 }
1930
1931 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1932                                            struct devlink_dpipe_value *values,
1933                                            unsigned int values_count)
1934 {
1935         struct nlattr *action_attr;
1936         int i;
1937         int err;
1938
1939         for (i = 0; i < values_count; i++) {
1940                 action_attr = nla_nest_start(skb,
1941                                              DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1942                 if (!action_attr)
1943                         return -EMSGSIZE;
1944                 err = devlink_dpipe_action_value_put(skb, &values[i]);
1945                 if (err)
1946                         goto err_action_value_put;
1947                 nla_nest_end(skb, action_attr);
1948         }
1949         return 0;
1950
1951 err_action_value_put:
1952         nla_nest_cancel(skb, action_attr);
1953         return err;
1954 }
1955
1956 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
1957                                          struct devlink_dpipe_value *value)
1958 {
1959         if (!value->match)
1960                 return -EINVAL;
1961         if (devlink_dpipe_match_put(skb, value->match))
1962                 return -EMSGSIZE;
1963         if (devlink_dpipe_value_put(skb, value))
1964                 return -EMSGSIZE;
1965         return 0;
1966 }
1967
1968 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
1969                                           struct devlink_dpipe_value *values,
1970                                           unsigned int values_count)
1971 {
1972         struct nlattr *match_attr;
1973         int i;
1974         int err;
1975
1976         for (i = 0; i < values_count; i++) {
1977                 match_attr = nla_nest_start(skb,
1978                                             DEVLINK_ATTR_DPIPE_MATCH_VALUE);
1979                 if (!match_attr)
1980                         return -EMSGSIZE;
1981                 err = devlink_dpipe_match_value_put(skb, &values[i]);
1982                 if (err)
1983                         goto err_match_value_put;
1984                 nla_nest_end(skb, match_attr);
1985         }
1986         return 0;
1987
1988 err_match_value_put:
1989         nla_nest_cancel(skb, match_attr);
1990         return err;
1991 }
1992
1993 static int devlink_dpipe_entry_put(struct sk_buff *skb,
1994                                    struct devlink_dpipe_entry *entry)
1995 {
1996         struct nlattr *entry_attr, *matches_attr, *actions_attr;
1997         int err;
1998
1999         entry_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2000         if (!entry_attr)
2001                 return  -EMSGSIZE;
2002
2003         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2004                               DEVLINK_ATTR_PAD))
2005                 goto nla_put_failure;
2006         if (entry->counter_valid)
2007                 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2008                                       entry->counter, DEVLINK_ATTR_PAD))
2009                         goto nla_put_failure;
2010
2011         matches_attr = nla_nest_start(skb,
2012                                       DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2013         if (!matches_attr)
2014                 goto nla_put_failure;
2015
2016         err = devlink_dpipe_match_values_put(skb, entry->match_values,
2017                                              entry->match_values_count);
2018         if (err) {
2019                 nla_nest_cancel(skb, matches_attr);
2020                 goto err_match_values_put;
2021         }
2022         nla_nest_end(skb, matches_attr);
2023
2024         actions_attr = nla_nest_start(skb,
2025                                       DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2026         if (!actions_attr)
2027                 goto nla_put_failure;
2028
2029         err = devlink_dpipe_action_values_put(skb, entry->action_values,
2030                                               entry->action_values_count);
2031         if (err) {
2032                 nla_nest_cancel(skb, actions_attr);
2033                 goto err_action_values_put;
2034         }
2035         nla_nest_end(skb, actions_attr);
2036
2037         nla_nest_end(skb, entry_attr);
2038         return 0;
2039
2040 nla_put_failure:
2041         err = -EMSGSIZE;
2042 err_match_values_put:
2043 err_action_values_put:
2044         nla_nest_cancel(skb, entry_attr);
2045         return err;
2046 }
2047
2048 static struct devlink_dpipe_table *
2049 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2050                          const char *table_name)
2051 {
2052         struct devlink_dpipe_table *table;
2053
2054         list_for_each_entry_rcu(table, dpipe_tables, list) {
2055                 if (!strcmp(table->name, table_name))
2056                         return table;
2057         }
2058         return NULL;
2059 }
2060
2061 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2062 {
2063         struct devlink *devlink;
2064         int err;
2065
2066         err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2067                                                dump_ctx->info);
2068         if (err)
2069                 return err;
2070
2071         dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2072                                     dump_ctx->info->snd_portid,
2073                                     dump_ctx->info->snd_seq,
2074                                     &devlink_nl_family, NLM_F_MULTI,
2075                                     dump_ctx->cmd);
2076         if (!dump_ctx->hdr)
2077                 goto nla_put_failure;
2078
2079         devlink = dump_ctx->info->user_ptr[0];
2080         if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2081                 goto nla_put_failure;
2082         dump_ctx->nest = nla_nest_start(dump_ctx->skb,
2083                                         DEVLINK_ATTR_DPIPE_ENTRIES);
2084         if (!dump_ctx->nest)
2085                 goto nla_put_failure;
2086         return 0;
2087
2088 nla_put_failure:
2089         nlmsg_free(dump_ctx->skb);
2090         return -EMSGSIZE;
2091 }
2092 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2093
2094 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2095                                    struct devlink_dpipe_entry *entry)
2096 {
2097         return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2098 }
2099 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2100
2101 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2102 {
2103         nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2104         genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2105         return 0;
2106 }
2107 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2108
2109 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2110
2111 {
2112         unsigned int value_count, value_index;
2113         struct devlink_dpipe_value *value;
2114
2115         value = entry->action_values;
2116         value_count = entry->action_values_count;
2117         for (value_index = 0; value_index < value_count; value_index++) {
2118                 kfree(value[value_index].value);
2119                 kfree(value[value_index].mask);
2120         }
2121
2122         value = entry->match_values;
2123         value_count = entry->match_values_count;
2124         for (value_index = 0; value_index < value_count; value_index++) {
2125                 kfree(value[value_index].value);
2126                 kfree(value[value_index].mask);
2127         }
2128 }
2129 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2130
2131 static int devlink_dpipe_entries_fill(struct genl_info *info,
2132                                       enum devlink_command cmd, int flags,
2133                                       struct devlink_dpipe_table *table)
2134 {
2135         struct devlink_dpipe_dump_ctx dump_ctx;
2136         struct nlmsghdr *nlh;
2137         int err;
2138
2139         dump_ctx.skb = NULL;
2140         dump_ctx.cmd = cmd;
2141         dump_ctx.info = info;
2142
2143         err = table->table_ops->entries_dump(table->priv,
2144                                              table->counters_enabled,
2145                                              &dump_ctx);
2146         if (err)
2147                 return err;
2148
2149 send_done:
2150         nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2151                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2152         if (!nlh) {
2153                 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2154                 if (err)
2155                         return err;
2156                 goto send_done;
2157         }
2158         return genlmsg_reply(dump_ctx.skb, info);
2159 }
2160
2161 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2162                                             struct genl_info *info)
2163 {
2164         struct devlink *devlink = info->user_ptr[0];
2165         struct devlink_dpipe_table *table;
2166         const char *table_name;
2167
2168         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2169                 return -EINVAL;
2170
2171         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2172         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2173                                          table_name);
2174         if (!table)
2175                 return -EINVAL;
2176
2177         if (!table->table_ops->entries_dump)
2178                 return -EINVAL;
2179
2180         return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2181                                           0, table);
2182 }
2183
2184 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2185                                     const struct devlink_dpipe_header *header)
2186 {
2187         struct devlink_dpipe_field *field;
2188         struct nlattr *field_attr;
2189         int i;
2190
2191         for (i = 0; i < header->fields_count; i++) {
2192                 field = &header->fields[i];
2193                 field_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_FIELD);
2194                 if (!field_attr)
2195                         return -EMSGSIZE;
2196                 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2197                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2198                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2199                     nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2200                         goto nla_put_failure;
2201                 nla_nest_end(skb, field_attr);
2202         }
2203         return 0;
2204
2205 nla_put_failure:
2206         nla_nest_cancel(skb, field_attr);
2207         return -EMSGSIZE;
2208 }
2209
2210 static int devlink_dpipe_header_put(struct sk_buff *skb,
2211                                     struct devlink_dpipe_header *header)
2212 {
2213         struct nlattr *fields_attr, *header_attr;
2214         int err;
2215
2216         header_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER);
2217         if (!header_attr)
2218                 return -EMSGSIZE;
2219
2220         if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2221             nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2222             nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2223                 goto nla_put_failure;
2224
2225         fields_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2226         if (!fields_attr)
2227                 goto nla_put_failure;
2228
2229         err = devlink_dpipe_fields_put(skb, header);
2230         if (err) {
2231                 nla_nest_cancel(skb, fields_attr);
2232                 goto nla_put_failure;
2233         }
2234         nla_nest_end(skb, fields_attr);
2235         nla_nest_end(skb, header_attr);
2236         return 0;
2237
2238 nla_put_failure:
2239         err = -EMSGSIZE;
2240         nla_nest_cancel(skb, header_attr);
2241         return err;
2242 }
2243
2244 static int devlink_dpipe_headers_fill(struct genl_info *info,
2245                                       enum devlink_command cmd, int flags,
2246                                       struct devlink_dpipe_headers *
2247                                       dpipe_headers)
2248 {
2249         struct devlink *devlink = info->user_ptr[0];
2250         struct nlattr *headers_attr;
2251         struct sk_buff *skb = NULL;
2252         struct nlmsghdr *nlh;
2253         void *hdr;
2254         int i, j;
2255         int err;
2256
2257         i = 0;
2258 start_again:
2259         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2260         if (err)
2261                 return err;
2262
2263         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2264                           &devlink_nl_family, NLM_F_MULTI, cmd);
2265         if (!hdr) {
2266                 nlmsg_free(skb);
2267                 return -EMSGSIZE;
2268         }
2269
2270         if (devlink_nl_put_handle(skb, devlink))
2271                 goto nla_put_failure;
2272         headers_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2273         if (!headers_attr)
2274                 goto nla_put_failure;
2275
2276         j = 0;
2277         for (; i < dpipe_headers->headers_count; i++) {
2278                 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2279                 if (err) {
2280                         if (!j)
2281                                 goto err_table_put;
2282                         break;
2283                 }
2284                 j++;
2285         }
2286         nla_nest_end(skb, headers_attr);
2287         genlmsg_end(skb, hdr);
2288         if (i != dpipe_headers->headers_count)
2289                 goto start_again;
2290
2291 send_done:
2292         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2293                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2294         if (!nlh) {
2295                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2296                 if (err)
2297                         return err;
2298                 goto send_done;
2299         }
2300         return genlmsg_reply(skb, info);
2301
2302 nla_put_failure:
2303         err = -EMSGSIZE;
2304 err_table_put:
2305         nlmsg_free(skb);
2306         return err;
2307 }
2308
2309 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2310                                             struct genl_info *info)
2311 {
2312         struct devlink *devlink = info->user_ptr[0];
2313
2314         if (!devlink->dpipe_headers)
2315                 return -EOPNOTSUPP;
2316         return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2317                                           0, devlink->dpipe_headers);
2318 }
2319
2320 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2321                                             const char *table_name,
2322                                             bool enable)
2323 {
2324         struct devlink_dpipe_table *table;
2325
2326         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2327                                          table_name);
2328         if (!table)
2329                 return -EINVAL;
2330
2331         if (table->counter_control_extern)
2332                 return -EOPNOTSUPP;
2333
2334         if (!(table->counters_enabled ^ enable))
2335                 return 0;
2336
2337         table->counters_enabled = enable;
2338         if (table->table_ops->counters_set_update)
2339                 table->table_ops->counters_set_update(table->priv, enable);
2340         return 0;
2341 }
2342
2343 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2344                                                    struct genl_info *info)
2345 {
2346         struct devlink *devlink = info->user_ptr[0];
2347         const char *table_name;
2348         bool counters_enable;
2349
2350         if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2351             !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2352                 return -EINVAL;
2353
2354         table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2355         counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2356
2357         return devlink_dpipe_table_counters_set(devlink, table_name,
2358                                                 counters_enable);
2359 }
2360
2361 static struct devlink_resource *
2362 devlink_resource_find(struct devlink *devlink,
2363                       struct devlink_resource *resource, u64 resource_id)
2364 {
2365         struct list_head *resource_list;
2366
2367         if (resource)
2368                 resource_list = &resource->resource_list;
2369         else
2370                 resource_list = &devlink->resource_list;
2371
2372         list_for_each_entry(resource, resource_list, list) {
2373                 struct devlink_resource *child_resource;
2374
2375                 if (resource->id == resource_id)
2376                         return resource;
2377
2378                 child_resource = devlink_resource_find(devlink, resource,
2379                                                        resource_id);
2380                 if (child_resource)
2381                         return child_resource;
2382         }
2383         return NULL;
2384 }
2385
2386 static void
2387 devlink_resource_validate_children(struct devlink_resource *resource)
2388 {
2389         struct devlink_resource *child_resource;
2390         bool size_valid = true;
2391         u64 parts_size = 0;
2392
2393         if (list_empty(&resource->resource_list))
2394                 goto out;
2395
2396         list_for_each_entry(child_resource, &resource->resource_list, list)
2397                 parts_size += child_resource->size_new;
2398
2399         if (parts_size > resource->size_new)
2400                 size_valid = false;
2401 out:
2402         resource->size_valid = size_valid;
2403 }
2404
2405 static int
2406 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2407                                struct netlink_ext_ack *extack)
2408 {
2409         u64 reminder;
2410         int err = 0;
2411
2412         if (size > resource->size_params.size_max) {
2413                 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2414                 err = -EINVAL;
2415         }
2416
2417         if (size < resource->size_params.size_min) {
2418                 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2419                 err = -EINVAL;
2420         }
2421
2422         div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2423         if (reminder) {
2424                 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2425                 err = -EINVAL;
2426         }
2427
2428         return err;
2429 }
2430
2431 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2432                                        struct genl_info *info)
2433 {
2434         struct devlink *devlink = info->user_ptr[0];
2435         struct devlink_resource *resource;
2436         u64 resource_id;
2437         u64 size;
2438         int err;
2439
2440         if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2441             !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2442                 return -EINVAL;
2443         resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2444
2445         resource = devlink_resource_find(devlink, NULL, resource_id);
2446         if (!resource)
2447                 return -EINVAL;
2448
2449         size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2450         err = devlink_resource_validate_size(resource, size, info->extack);
2451         if (err)
2452                 return err;
2453
2454         resource->size_new = size;
2455         devlink_resource_validate_children(resource);
2456         if (resource->parent)
2457                 devlink_resource_validate_children(resource->parent);
2458         return 0;
2459 }
2460
2461 static int
2462 devlink_resource_size_params_put(struct devlink_resource *resource,
2463                                  struct sk_buff *skb)
2464 {
2465         struct devlink_resource_size_params *size_params;
2466
2467         size_params = &resource->size_params;
2468         if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2469                               size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2470             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2471                               size_params->size_max, DEVLINK_ATTR_PAD) ||
2472             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2473                               size_params->size_min, DEVLINK_ATTR_PAD) ||
2474             nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2475                 return -EMSGSIZE;
2476         return 0;
2477 }
2478
2479 static int devlink_resource_occ_put(struct devlink_resource *resource,
2480                                     struct sk_buff *skb)
2481 {
2482         if (!resource->occ_get)
2483                 return 0;
2484         return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2485                                  resource->occ_get(resource->occ_get_priv),
2486                                  DEVLINK_ATTR_PAD);
2487 }
2488
2489 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2490                                 struct devlink_resource *resource)
2491 {
2492         struct devlink_resource *child_resource;
2493         struct nlattr *child_resource_attr;
2494         struct nlattr *resource_attr;
2495
2496         resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE);
2497         if (!resource_attr)
2498                 return -EMSGSIZE;
2499
2500         if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2501             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2502                               DEVLINK_ATTR_PAD) ||
2503             nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2504                               DEVLINK_ATTR_PAD))
2505                 goto nla_put_failure;
2506         if (resource->size != resource->size_new)
2507                 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2508                                   resource->size_new, DEVLINK_ATTR_PAD);
2509         if (devlink_resource_occ_put(resource, skb))
2510                 goto nla_put_failure;
2511         if (devlink_resource_size_params_put(resource, skb))
2512                 goto nla_put_failure;
2513         if (list_empty(&resource->resource_list))
2514                 goto out;
2515
2516         if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2517                        resource->size_valid))
2518                 goto nla_put_failure;
2519
2520         child_resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2521         if (!child_resource_attr)
2522                 goto nla_put_failure;
2523
2524         list_for_each_entry(child_resource, &resource->resource_list, list) {
2525                 if (devlink_resource_put(devlink, skb, child_resource))
2526                         goto resource_put_failure;
2527         }
2528
2529         nla_nest_end(skb, child_resource_attr);
2530 out:
2531         nla_nest_end(skb, resource_attr);
2532         return 0;
2533
2534 resource_put_failure:
2535         nla_nest_cancel(skb, child_resource_attr);
2536 nla_put_failure:
2537         nla_nest_cancel(skb, resource_attr);
2538         return -EMSGSIZE;
2539 }
2540
2541 static int devlink_resource_fill(struct genl_info *info,
2542                                  enum devlink_command cmd, int flags)
2543 {
2544         struct devlink *devlink = info->user_ptr[0];
2545         struct devlink_resource *resource;
2546         struct nlattr *resources_attr;
2547         struct sk_buff *skb = NULL;
2548         struct nlmsghdr *nlh;
2549         bool incomplete;
2550         void *hdr;
2551         int i;
2552         int err;
2553
2554         resource = list_first_entry(&devlink->resource_list,
2555                                     struct devlink_resource, list);
2556 start_again:
2557         err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2558         if (err)
2559                 return err;
2560
2561         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2562                           &devlink_nl_family, NLM_F_MULTI, cmd);
2563         if (!hdr) {
2564                 nlmsg_free(skb);
2565                 return -EMSGSIZE;
2566         }
2567
2568         if (devlink_nl_put_handle(skb, devlink))
2569                 goto nla_put_failure;
2570
2571         resources_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2572         if (!resources_attr)
2573                 goto nla_put_failure;
2574
2575         incomplete = false;
2576         i = 0;
2577         list_for_each_entry_from(resource, &devlink->resource_list, list) {
2578                 err = devlink_resource_put(devlink, skb, resource);
2579                 if (err) {
2580                         if (!i)
2581                                 goto err_resource_put;
2582                         incomplete = true;
2583                         break;
2584                 }
2585                 i++;
2586         }
2587         nla_nest_end(skb, resources_attr);
2588         genlmsg_end(skb, hdr);
2589         if (incomplete)
2590                 goto start_again;
2591 send_done:
2592         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2593                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
2594         if (!nlh) {
2595                 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2596                 if (err)
2597                         return err;
2598                 goto send_done;
2599         }
2600         return genlmsg_reply(skb, info);
2601
2602 nla_put_failure:
2603         err = -EMSGSIZE;
2604 err_resource_put:
2605         nlmsg_free(skb);
2606         return err;
2607 }
2608
2609 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2610                                         struct genl_info *info)
2611 {
2612         struct devlink *devlink = info->user_ptr[0];
2613
2614         if (list_empty(&devlink->resource_list))
2615                 return -EOPNOTSUPP;
2616
2617         return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2618 }
2619
2620 static int
2621 devlink_resources_validate(struct devlink *devlink,
2622                            struct devlink_resource *resource,
2623                            struct genl_info *info)
2624 {
2625         struct list_head *resource_list;
2626         int err = 0;
2627
2628         if (resource)
2629                 resource_list = &resource->resource_list;
2630         else
2631                 resource_list = &devlink->resource_list;
2632
2633         list_for_each_entry(resource, resource_list, list) {
2634                 if (!resource->size_valid)
2635                         return -EINVAL;
2636                 err = devlink_resources_validate(devlink, resource, info);
2637                 if (err)
2638                         return err;
2639         }
2640         return err;
2641 }
2642
2643 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2644 {
2645         struct devlink *devlink = info->user_ptr[0];
2646         int err;
2647
2648         if (!devlink->ops->reload)
2649                 return -EOPNOTSUPP;
2650
2651         err = devlink_resources_validate(devlink, NULL, info);
2652         if (err) {
2653                 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2654                 return err;
2655         }
2656         return devlink->ops->reload(devlink, info->extack);
2657 }
2658
2659 static const struct devlink_param devlink_param_generic[] = {
2660         {
2661                 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2662                 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2663                 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2664         },
2665         {
2666                 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2667                 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2668                 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2669         },
2670         {
2671                 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2672                 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2673                 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2674         },
2675         {
2676                 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2677                 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2678                 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2679         },
2680         {
2681                 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
2682                 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
2683                 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
2684         },
2685         {
2686                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
2687                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
2688                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
2689         },
2690         {
2691                 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
2692                 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
2693                 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
2694         },
2695 };
2696
2697 static int devlink_param_generic_verify(const struct devlink_param *param)
2698 {
2699         /* verify it match generic parameter by id and name */
2700         if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
2701                 return -EINVAL;
2702         if (strcmp(param->name, devlink_param_generic[param->id].name))
2703                 return -ENOENT;
2704
2705         WARN_ON(param->type != devlink_param_generic[param->id].type);
2706
2707         return 0;
2708 }
2709
2710 static int devlink_param_driver_verify(const struct devlink_param *param)
2711 {
2712         int i;
2713
2714         if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
2715                 return -EINVAL;
2716         /* verify no such name in generic params */
2717         for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
2718                 if (!strcmp(param->name, devlink_param_generic[i].name))
2719                         return -EEXIST;
2720
2721         return 0;
2722 }
2723
2724 static struct devlink_param_item *
2725 devlink_param_find_by_name(struct list_head *param_list,
2726                            const char *param_name)
2727 {
2728         struct devlink_param_item *param_item;
2729
2730         list_for_each_entry(param_item, param_list, list)
2731                 if (!strcmp(param_item->param->name, param_name))
2732                         return param_item;
2733         return NULL;
2734 }
2735
2736 static struct devlink_param_item *
2737 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
2738 {
2739         struct devlink_param_item *param_item;
2740
2741         list_for_each_entry(param_item, param_list, list)
2742                 if (param_item->param->id == param_id)
2743                         return param_item;
2744         return NULL;
2745 }
2746
2747 static bool
2748 devlink_param_cmode_is_supported(const struct devlink_param *param,
2749                                  enum devlink_param_cmode cmode)
2750 {
2751         return test_bit(cmode, &param->supported_cmodes);
2752 }
2753
2754 static int devlink_param_get(struct devlink *devlink,
2755                              const struct devlink_param *param,
2756                              struct devlink_param_gset_ctx *ctx)
2757 {
2758         if (!param->get)
2759                 return -EOPNOTSUPP;
2760         return param->get(devlink, param->id, ctx);
2761 }
2762
2763 static int devlink_param_set(struct devlink *devlink,
2764                              const struct devlink_param *param,
2765                              struct devlink_param_gset_ctx *ctx)
2766 {
2767         if (!param->set)
2768                 return -EOPNOTSUPP;
2769         return param->set(devlink, param->id, ctx);
2770 }
2771
2772 static int
2773 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
2774 {
2775         switch (param_type) {
2776         case DEVLINK_PARAM_TYPE_U8:
2777                 return NLA_U8;
2778         case DEVLINK_PARAM_TYPE_U16:
2779                 return NLA_U16;
2780         case DEVLINK_PARAM_TYPE_U32:
2781                 return NLA_U32;
2782         case DEVLINK_PARAM_TYPE_STRING:
2783                 return NLA_STRING;
2784         case DEVLINK_PARAM_TYPE_BOOL:
2785                 return NLA_FLAG;
2786         default:
2787                 return -EINVAL;
2788         }
2789 }
2790
2791 static int
2792 devlink_nl_param_value_fill_one(struct sk_buff *msg,
2793                                 enum devlink_param_type type,
2794                                 enum devlink_param_cmode cmode,
2795                                 union devlink_param_value val)
2796 {
2797         struct nlattr *param_value_attr;
2798
2799         param_value_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUE);
2800         if (!param_value_attr)
2801                 goto nla_put_failure;
2802
2803         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
2804                 goto value_nest_cancel;
2805
2806         switch (type) {
2807         case DEVLINK_PARAM_TYPE_U8:
2808                 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
2809                         goto value_nest_cancel;
2810                 break;
2811         case DEVLINK_PARAM_TYPE_U16:
2812                 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
2813                         goto value_nest_cancel;
2814                 break;
2815         case DEVLINK_PARAM_TYPE_U32:
2816                 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
2817                         goto value_nest_cancel;
2818                 break;
2819         case DEVLINK_PARAM_TYPE_STRING:
2820                 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
2821                                    val.vstr))
2822                         goto value_nest_cancel;
2823                 break;
2824         case DEVLINK_PARAM_TYPE_BOOL:
2825                 if (val.vbool &&
2826                     nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
2827                         goto value_nest_cancel;
2828                 break;
2829         }
2830
2831         nla_nest_end(msg, param_value_attr);
2832         return 0;
2833
2834 value_nest_cancel:
2835         nla_nest_cancel(msg, param_value_attr);
2836 nla_put_failure:
2837         return -EMSGSIZE;
2838 }
2839
2840 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
2841                                  struct devlink_param_item *param_item,
2842                                  enum devlink_command cmd,
2843                                  u32 portid, u32 seq, int flags)
2844 {
2845         union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
2846         const struct devlink_param *param = param_item->param;
2847         struct devlink_param_gset_ctx ctx;
2848         struct nlattr *param_values_list;
2849         struct nlattr *param_attr;
2850         int nla_type;
2851         void *hdr;
2852         int err;
2853         int i;
2854
2855         /* Get value from driver part to driverinit configuration mode */
2856         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2857                 if (!devlink_param_cmode_is_supported(param, i))
2858                         continue;
2859                 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
2860                         if (!param_item->driverinit_value_valid)
2861                                 return -EOPNOTSUPP;
2862                         param_value[i] = param_item->driverinit_value;
2863                 } else {
2864                         ctx.cmode = i;
2865                         err = devlink_param_get(devlink, param, &ctx);
2866                         if (err)
2867                                 return err;
2868                         param_value[i] = ctx.val;
2869                 }
2870         }
2871
2872         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
2873         if (!hdr)
2874                 return -EMSGSIZE;
2875
2876         if (devlink_nl_put_handle(msg, devlink))
2877                 goto genlmsg_cancel;
2878         param_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM);
2879         if (!param_attr)
2880                 goto genlmsg_cancel;
2881         if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
2882                 goto param_nest_cancel;
2883         if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
2884                 goto param_nest_cancel;
2885
2886         nla_type = devlink_param_type_to_nla_type(param->type);
2887         if (nla_type < 0)
2888                 goto param_nest_cancel;
2889         if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
2890                 goto param_nest_cancel;
2891
2892         param_values_list = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUES_LIST);
2893         if (!param_values_list)
2894                 goto param_nest_cancel;
2895
2896         for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2897                 if (!devlink_param_cmode_is_supported(param, i))
2898                         continue;
2899                 err = devlink_nl_param_value_fill_one(msg, param->type,
2900                                                       i, param_value[i]);
2901                 if (err)
2902                         goto values_list_nest_cancel;
2903         }
2904
2905         nla_nest_end(msg, param_values_list);
2906         nla_nest_end(msg, param_attr);
2907         genlmsg_end(msg, hdr);
2908         return 0;
2909
2910 values_list_nest_cancel:
2911         nla_nest_end(msg, param_values_list);
2912 param_nest_cancel:
2913         nla_nest_cancel(msg, param_attr);
2914 genlmsg_cancel:
2915         genlmsg_cancel(msg, hdr);
2916         return -EMSGSIZE;
2917 }
2918
2919 static void devlink_param_notify(struct devlink *devlink,
2920                                  struct devlink_param_item *param_item,
2921                                  enum devlink_command cmd)
2922 {
2923         struct sk_buff *msg;
2924         int err;
2925
2926         WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL);
2927
2928         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2929         if (!msg)
2930                 return;
2931         err = devlink_nl_param_fill(msg, devlink, param_item, cmd, 0, 0, 0);
2932         if (err) {
2933                 nlmsg_free(msg);
2934                 return;
2935         }
2936
2937         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2938                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2939 }
2940
2941 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
2942                                            struct netlink_callback *cb)
2943 {
2944         struct devlink_param_item *param_item;
2945         struct devlink *devlink;
2946         int start = cb->args[0];
2947         int idx = 0;
2948         int err;
2949
2950         mutex_lock(&devlink_mutex);
2951         list_for_each_entry(devlink, &devlink_list, list) {
2952                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
2953                         continue;
2954                 mutex_lock(&devlink->lock);
2955                 list_for_each_entry(param_item, &devlink->param_list, list) {
2956                         if (idx < start) {
2957                                 idx++;
2958                                 continue;
2959                         }
2960                         err = devlink_nl_param_fill(msg, devlink, param_item,
2961                                                     DEVLINK_CMD_PARAM_GET,
2962                                                     NETLINK_CB(cb->skb).portid,
2963                                                     cb->nlh->nlmsg_seq,
2964                                                     NLM_F_MULTI);
2965                         if (err) {
2966                                 mutex_unlock(&devlink->lock);
2967                                 goto out;
2968                         }
2969                         idx++;
2970                 }
2971                 mutex_unlock(&devlink->lock);
2972         }
2973 out:
2974         mutex_unlock(&devlink_mutex);
2975
2976         cb->args[0] = idx;
2977         return msg->len;
2978 }
2979
2980 static int
2981 devlink_param_type_get_from_info(struct genl_info *info,
2982                                  enum devlink_param_type *param_type)
2983 {
2984         if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
2985                 return -EINVAL;
2986
2987         switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
2988         case NLA_U8:
2989                 *param_type = DEVLINK_PARAM_TYPE_U8;
2990                 break;
2991         case NLA_U16:
2992                 *param_type = DEVLINK_PARAM_TYPE_U16;
2993                 break;
2994         case NLA_U32:
2995                 *param_type = DEVLINK_PARAM_TYPE_U32;
2996                 break;
2997         case NLA_STRING:
2998                 *param_type = DEVLINK_PARAM_TYPE_STRING;
2999                 break;
3000         case NLA_FLAG:
3001                 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3002                 break;
3003         default:
3004                 return -EINVAL;
3005         }
3006
3007         return 0;
3008 }
3009
3010 static int
3011 devlink_param_value_get_from_info(const struct devlink_param *param,
3012                                   struct genl_info *info,
3013                                   union devlink_param_value *value)
3014 {
3015         int len;
3016
3017         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3018             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3019                 return -EINVAL;
3020
3021         switch (param->type) {
3022         case DEVLINK_PARAM_TYPE_U8:
3023                 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3024                 break;
3025         case DEVLINK_PARAM_TYPE_U16:
3026                 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3027                 break;
3028         case DEVLINK_PARAM_TYPE_U32:
3029                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3030                 break;
3031         case DEVLINK_PARAM_TYPE_STRING:
3032                 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3033                               nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3034                 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3035                     len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3036                         return -EINVAL;
3037                 strcpy(value->vstr,
3038                        nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3039                 break;
3040         case DEVLINK_PARAM_TYPE_BOOL:
3041                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3042                                true : false;
3043                 break;
3044         }
3045         return 0;
3046 }
3047
3048 static struct devlink_param_item *
3049 devlink_param_get_from_info(struct devlink *devlink,
3050                             struct genl_info *info)
3051 {
3052         char *param_name;
3053
3054         if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3055                 return NULL;
3056
3057         param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3058         return devlink_param_find_by_name(&devlink->param_list, param_name);
3059 }
3060
3061 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3062                                          struct genl_info *info)
3063 {
3064         struct devlink *devlink = info->user_ptr[0];
3065         struct devlink_param_item *param_item;
3066         struct sk_buff *msg;
3067         int err;
3068
3069         param_item = devlink_param_get_from_info(devlink, info);
3070         if (!param_item)
3071                 return -EINVAL;
3072
3073         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3074         if (!msg)
3075                 return -ENOMEM;
3076
3077         err = devlink_nl_param_fill(msg, devlink, param_item,
3078                                     DEVLINK_CMD_PARAM_GET,
3079                                     info->snd_portid, info->snd_seq, 0);
3080         if (err) {
3081                 nlmsg_free(msg);
3082                 return err;
3083         }
3084
3085         return genlmsg_reply(msg, info);
3086 }
3087
3088 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3089                                          struct genl_info *info)
3090 {
3091         struct devlink *devlink = info->user_ptr[0];
3092         enum devlink_param_type param_type;
3093         struct devlink_param_gset_ctx ctx;
3094         enum devlink_param_cmode cmode;
3095         struct devlink_param_item *param_item;
3096         const struct devlink_param *param;
3097         union devlink_param_value value;
3098         int err = 0;
3099
3100         param_item = devlink_param_get_from_info(devlink, info);
3101         if (!param_item)
3102                 return -EINVAL;
3103         param = param_item->param;
3104         err = devlink_param_type_get_from_info(info, &param_type);
3105         if (err)
3106                 return err;
3107         if (param_type != param->type)
3108                 return -EINVAL;
3109         err = devlink_param_value_get_from_info(param, info, &value);
3110         if (err)
3111                 return err;
3112         if (param->validate) {
3113                 err = param->validate(devlink, param->id, value, info->extack);
3114                 if (err)
3115                         return err;
3116         }
3117
3118         if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3119                 return -EINVAL;
3120         cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3121         if (!devlink_param_cmode_is_supported(param, cmode))
3122                 return -EOPNOTSUPP;
3123
3124         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3125                 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3126                         strcpy(param_item->driverinit_value.vstr, value.vstr);
3127                 else
3128                         param_item->driverinit_value = value;
3129                 param_item->driverinit_value_valid = true;
3130         } else {
3131                 if (!param->set)
3132                         return -EOPNOTSUPP;
3133                 ctx.val = value;
3134                 ctx.cmode = cmode;
3135                 err = devlink_param_set(devlink, param, &ctx);
3136                 if (err)
3137                         return err;
3138         }
3139
3140         devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
3141         return 0;
3142 }
3143
3144 static int devlink_param_register_one(struct devlink *devlink,
3145                                       const struct devlink_param *param)
3146 {
3147         struct devlink_param_item *param_item;
3148
3149         if (devlink_param_find_by_name(&devlink->param_list,
3150                                        param->name))
3151                 return -EEXIST;
3152
3153         if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3154                 WARN_ON(param->get || param->set);
3155         else
3156                 WARN_ON(!param->get || !param->set);
3157
3158         param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3159         if (!param_item)
3160                 return -ENOMEM;
3161         param_item->param = param;
3162
3163         list_add_tail(&param_item->list, &devlink->param_list);
3164         devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
3165         return 0;
3166 }
3167
3168 static void devlink_param_unregister_one(struct devlink *devlink,
3169                                          const struct devlink_param *param)
3170 {
3171         struct devlink_param_item *param_item;
3172
3173         param_item = devlink_param_find_by_name(&devlink->param_list,
3174                                                 param->name);
3175         WARN_ON(!param_item);
3176         devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_DEL);
3177         list_del(&param_item->list);
3178         kfree(param_item);
3179 }
3180
3181 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3182                                              struct devlink *devlink,
3183                                              struct devlink_snapshot *snapshot)
3184 {
3185         struct nlattr *snap_attr;
3186         int err;
3187
3188         snap_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3189         if (!snap_attr)
3190                 return -EINVAL;
3191
3192         err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3193         if (err)
3194                 goto nla_put_failure;
3195
3196         nla_nest_end(msg, snap_attr);
3197         return 0;
3198
3199 nla_put_failure:
3200         nla_nest_cancel(msg, snap_attr);
3201         return err;
3202 }
3203
3204 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3205                                               struct devlink *devlink,
3206                                               struct devlink_region *region)
3207 {
3208         struct devlink_snapshot *snapshot;
3209         struct nlattr *snapshots_attr;
3210         int err;
3211
3212         snapshots_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOTS);
3213         if (!snapshots_attr)
3214                 return -EINVAL;
3215
3216         list_for_each_entry(snapshot, &region->snapshot_list, list) {
3217                 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3218                 if (err)
3219                         goto nla_put_failure;
3220         }
3221
3222         nla_nest_end(msg, snapshots_attr);
3223         return 0;
3224
3225 nla_put_failure:
3226         nla_nest_cancel(msg, snapshots_attr);
3227         return err;
3228 }
3229
3230 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3231                                   enum devlink_command cmd, u32 portid,
3232                                   u32 seq, int flags,
3233                                   struct devlink_region *region)
3234 {
3235         void *hdr;
3236         int err;
3237
3238         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3239         if (!hdr)
3240                 return -EMSGSIZE;
3241
3242         err = devlink_nl_put_handle(msg, devlink);
3243         if (err)
3244                 goto nla_put_failure;
3245
3246         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3247         if (err)
3248                 goto nla_put_failure;
3249
3250         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3251                                 region->size,
3252                                 DEVLINK_ATTR_PAD);
3253         if (err)
3254                 goto nla_put_failure;
3255
3256         err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3257         if (err)
3258                 goto nla_put_failure;
3259
3260         genlmsg_end(msg, hdr);
3261         return 0;
3262
3263 nla_put_failure:
3264         genlmsg_cancel(msg, hdr);
3265         return err;
3266 }
3267
3268 static void devlink_nl_region_notify(struct devlink_region *region,
3269                                      struct devlink_snapshot *snapshot,
3270                                      enum devlink_command cmd)
3271 {
3272         struct devlink *devlink = region->devlink;
3273         struct sk_buff *msg;
3274         void *hdr;
3275         int err;
3276
3277         WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3278
3279         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3280         if (!msg)
3281                 return;
3282
3283         hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3284         if (!hdr)
3285                 goto out_free_msg;
3286
3287         err = devlink_nl_put_handle(msg, devlink);
3288         if (err)
3289                 goto out_cancel_msg;
3290
3291         err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3292                              region->name);
3293         if (err)
3294                 goto out_cancel_msg;
3295
3296         if (snapshot) {
3297                 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3298                                   snapshot->id);
3299                 if (err)
3300                         goto out_cancel_msg;
3301         } else {
3302                 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3303                                         region->size, DEVLINK_ATTR_PAD);
3304                 if (err)
3305                         goto out_cancel_msg;
3306         }
3307         genlmsg_end(msg, hdr);
3308
3309         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3310                                 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3311
3312         return;
3313
3314 out_cancel_msg:
3315         genlmsg_cancel(msg, hdr);
3316 out_free_msg:
3317         nlmsg_free(msg);
3318 }
3319
3320 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3321                                           struct genl_info *info)
3322 {
3323         struct devlink *devlink = info->user_ptr[0];
3324         struct devlink_region *region;
3325         const char *region_name;
3326         struct sk_buff *msg;
3327         int err;
3328
3329         if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3330                 return -EINVAL;
3331
3332         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3333         region = devlink_region_get_by_name(devlink, region_name);
3334         if (!region)
3335                 return -EINVAL;
3336
3337         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3338         if (!msg)
3339                 return -ENOMEM;
3340
3341         err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3342                                      info->snd_portid, info->snd_seq, 0,
3343                                      region);
3344         if (err) {
3345                 nlmsg_free(msg);
3346                 return err;
3347         }
3348
3349         return genlmsg_reply(msg, info);
3350 }
3351
3352 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3353                                             struct netlink_callback *cb)
3354 {
3355         struct devlink_region *region;
3356         struct devlink *devlink;
3357         int start = cb->args[0];
3358         int idx = 0;
3359         int err;
3360
3361         mutex_lock(&devlink_mutex);
3362         list_for_each_entry(devlink, &devlink_list, list) {
3363                 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3364                         continue;
3365
3366                 mutex_lock(&devlink->lock);
3367                 list_for_each_entry(region, &devlink->region_list, list) {
3368                         if (idx < start) {
3369                                 idx++;
3370                                 continue;
3371                         }
3372                         err = devlink_nl_region_fill(msg, devlink,
3373                                                      DEVLINK_CMD_REGION_GET,
3374                                                      NETLINK_CB(cb->skb).portid,
3375                                                      cb->nlh->nlmsg_seq,
3376                                                      NLM_F_MULTI, region);
3377                         if (err) {
3378                                 mutex_unlock(&devlink->lock);
3379                                 goto out;
3380                         }
3381                         idx++;
3382                 }
3383                 mutex_unlock(&devlink->lock);
3384         }
3385 out:
3386         mutex_unlock(&devlink_mutex);
3387         cb->args[0] = idx;
3388         return msg->len;
3389 }
3390
3391 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3392                                      struct genl_info *info)
3393 {
3394         struct devlink *devlink = info->user_ptr[0];
3395         struct devlink_snapshot *snapshot;
3396         struct devlink_region *region;
3397         const char *region_name;
3398         u32 snapshot_id;
3399
3400         if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3401             !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3402                 return -EINVAL;
3403
3404         region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3405         snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3406
3407         region = devlink_region_get_by_name(devlink, region_name);
3408         if (!region)
3409                 return -EINVAL;
3410
3411         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3412         if (!snapshot)
3413                 return -EINVAL;
3414
3415         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3416         devlink_region_snapshot_del(snapshot);
3417         return 0;
3418 }
3419
3420 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3421                                                  struct devlink *devlink,
3422                                                  u8 *chunk, u32 chunk_size,
3423                                                  u64 addr)
3424 {
3425         struct nlattr *chunk_attr;
3426         int err;
3427
3428         chunk_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_CHUNK);
3429         if (!chunk_attr)
3430                 return -EINVAL;
3431
3432         err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3433         if (err)
3434                 goto nla_put_failure;
3435
3436         err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3437                                 DEVLINK_ATTR_PAD);
3438         if (err)
3439                 goto nla_put_failure;
3440
3441         nla_nest_end(msg, chunk_attr);
3442         return 0;
3443
3444 nla_put_failure:
3445         nla_nest_cancel(msg, chunk_attr);
3446         return err;
3447 }
3448
3449 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3450
3451 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3452                                                 struct devlink *devlink,
3453                                                 struct devlink_region *region,
3454                                                 struct nlattr **attrs,
3455                                                 u64 start_offset,
3456                                                 u64 end_offset,
3457                                                 bool dump,
3458                                                 u64 *new_offset)
3459 {
3460         struct devlink_snapshot *snapshot;
3461         u64 curr_offset = start_offset;
3462         u32 snapshot_id;
3463         int err = 0;
3464
3465         *new_offset = start_offset;
3466
3467         snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3468         snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3469         if (!snapshot)
3470                 return -EINVAL;
3471
3472         if (end_offset > snapshot->data_len || dump)
3473                 end_offset = snapshot->data_len;
3474
3475         while (curr_offset < end_offset) {
3476                 u32 data_size;
3477                 u8 *data;
3478
3479                 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3480                         data_size = end_offset - curr_offset;
3481                 else
3482                         data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3483
3484                 data = &snapshot->data[curr_offset];
3485                 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3486                                                             data, data_size,
3487                                                             curr_offset);
3488                 if (err)
3489                         break;
3490
3491                 curr_offset += data_size;
3492         }
3493         *new_offset = curr_offset;
3494
3495         return err;
3496 }
3497
3498 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3499                                              struct netlink_callback *cb)
3500 {
3501         u64 ret_offset, start_offset, end_offset = 0;
3502         struct nlattr *attrs[DEVLINK_ATTR_MAX + 1];
3503         const struct genl_ops *ops = cb->data;
3504         struct devlink_region *region;
3505         struct nlattr *chunks_attr;
3506         const char *region_name;
3507         struct devlink *devlink;
3508         bool dump = true;
3509         void *hdr;
3510         int err;
3511
3512         start_offset = *((u64 *)&cb->args[0]);
3513
3514         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + devlink_nl_family.hdrsize,
3515                           attrs, DEVLINK_ATTR_MAX, ops->policy, cb->extack);
3516         if (err)
3517                 goto out;
3518
3519         devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3520         if (IS_ERR(devlink))
3521                 goto out;
3522
3523         mutex_lock(&devlink_mutex);
3524         mutex_lock(&devlink->lock);
3525
3526         if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3527             !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3528                 goto out_unlock;
3529
3530         region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3531         region = devlink_region_get_by_name(devlink, region_name);
3532         if (!region)
3533                 goto out_unlock;
3534
3535         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3536                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3537                           DEVLINK_CMD_REGION_READ);
3538         if (!hdr)
3539                 goto out_unlock;
3540
3541         err = devlink_nl_put_handle(skb, devlink);
3542         if (err)
3543                 goto nla_put_failure;
3544
3545         err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3546         if (err)
3547                 goto nla_put_failure;
3548
3549         chunks_attr = nla_nest_start(skb, DEVLINK_ATTR_REGION_CHUNKS);
3550         if (!chunks_attr)
3551                 goto nla_put_failure;
3552
3553         if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
3554             attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
3555                 if (!start_offset)
3556                         start_offset =
3557                                 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3558
3559                 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3560                 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
3561                 dump = false;
3562         }
3563
3564         err = devlink_nl_region_read_snapshot_fill(skb, devlink,
3565                                                    region, attrs,
3566                                                    start_offset,
3567                                                    end_offset, dump,
3568                                                    &ret_offset);
3569
3570         if (err && err != -EMSGSIZE)
3571                 goto nla_put_failure;
3572
3573         /* Check if there was any progress done to prevent infinite loop */
3574         if (ret_offset == start_offset)
3575                 goto nla_put_failure;
3576
3577         *((u64 *)&cb->args[0]) = ret_offset;
3578
3579         nla_nest_end(skb, chunks_attr);
3580         genlmsg_end(skb, hdr);
3581         mutex_unlock(&devlink->lock);
3582         mutex_unlock(&devlink_mutex);
3583
3584         return skb->len;
3585
3586 nla_put_failure:
3587         genlmsg_cancel(skb, hdr);
3588 out_unlock:
3589         mutex_unlock(&devlink->lock);
3590         mutex_unlock(&devlink_mutex);
3591 out:
3592         return 0;
3593 }
3594
3595 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
3596         [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
3597         [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
3598         [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
3599         [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
3600         [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
3601         [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
3602         [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
3603         [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
3604         [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
3605         [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
3606         [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
3607         [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
3608         [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
3609         [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
3610         [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
3611         [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
3612         [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
3613         [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
3614         [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
3615         [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
3616         [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
3617         [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
3618         [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
3619         [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
3620 };
3621
3622 static const struct genl_ops devlink_nl_ops[] = {
3623         {
3624                 .cmd = DEVLINK_CMD_GET,
3625                 .doit = devlink_nl_cmd_get_doit,
3626                 .dumpit = devlink_nl_cmd_get_dumpit,
3627                 .policy = devlink_nl_policy,
3628                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3629                 /* can be retrieved by unprivileged users */
3630         },
3631         {
3632                 .cmd = DEVLINK_CMD_PORT_GET,
3633                 .doit = devlink_nl_cmd_port_get_doit,
3634                 .dumpit = devlink_nl_cmd_port_get_dumpit,
3635                 .policy = devlink_nl_policy,
3636                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
3637                 /* can be retrieved by unprivileged users */
3638         },
3639         {
3640                 .cmd = DEVLINK_CMD_PORT_SET,
3641                 .doit = devlink_nl_cmd_port_set_doit,
3642                 .policy = devlink_nl_policy,
3643                 .flags = GENL_ADMIN_PERM,
3644                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
3645         },
3646         {
3647                 .cmd = DEVLINK_CMD_PORT_SPLIT,
3648                 .doit = devlink_nl_cmd_port_split_doit,
3649                 .policy = devlink_nl_policy,
3650                 .flags = GENL_ADMIN_PERM,
3651                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3652                                   DEVLINK_NL_FLAG_NO_LOCK,
3653         },
3654         {
3655                 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
3656                 .doit = devlink_nl_cmd_port_unsplit_doit,
3657                 .policy = devlink_nl_policy,
3658                 .flags = GENL_ADMIN_PERM,
3659                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3660                                   DEVLINK_NL_FLAG_NO_LOCK,
3661         },
3662         {
3663                 .cmd = DEVLINK_CMD_SB_GET,
3664                 .doit = devlink_nl_cmd_sb_get_doit,
3665                 .dumpit = devlink_nl_cmd_sb_get_dumpit,
3666                 .policy = devlink_nl_policy,
3667                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3668                                   DEVLINK_NL_FLAG_NEED_SB,
3669                 /* can be retrieved by unprivileged users */
3670         },
3671         {
3672                 .cmd = DEVLINK_CMD_SB_POOL_GET,
3673                 .doit = devlink_nl_cmd_sb_pool_get_doit,
3674                 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
3675                 .policy = devlink_nl_policy,
3676                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3677                                   DEVLINK_NL_FLAG_NEED_SB,
3678                 /* can be retrieved by unprivileged users */
3679         },
3680         {
3681                 .cmd = DEVLINK_CMD_SB_POOL_SET,
3682                 .doit = devlink_nl_cmd_sb_pool_set_doit,
3683                 .policy = devlink_nl_policy,
3684                 .flags = GENL_ADMIN_PERM,
3685                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3686                                   DEVLINK_NL_FLAG_NEED_SB,
3687         },
3688         {
3689                 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
3690                 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
3691                 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
3692                 .policy = devlink_nl_policy,
3693                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3694                                   DEVLINK_NL_FLAG_NEED_SB,
3695                 /* can be retrieved by unprivileged users */
3696         },
3697         {
3698                 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
3699                 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
3700                 .policy = devlink_nl_policy,
3701                 .flags = GENL_ADMIN_PERM,
3702                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3703                                   DEVLINK_NL_FLAG_NEED_SB,
3704         },
3705         {
3706                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
3707                 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
3708                 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
3709                 .policy = devlink_nl_policy,
3710                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3711                                   DEVLINK_NL_FLAG_NEED_SB,
3712                 /* can be retrieved by unprivileged users */
3713         },
3714         {
3715                 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
3716                 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
3717                 .policy = devlink_nl_policy,
3718                 .flags = GENL_ADMIN_PERM,
3719                 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3720                                   DEVLINK_NL_FLAG_NEED_SB,
3721         },
3722         {
3723                 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
3724                 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
3725                 .policy = devlink_nl_policy,
3726                 .flags = GENL_ADMIN_PERM,
3727                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3728                                   DEVLINK_NL_FLAG_NEED_SB,
3729         },
3730         {
3731                 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
3732                 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
3733                 .policy = devlink_nl_policy,
3734                 .flags = GENL_ADMIN_PERM,
3735                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3736                                   DEVLINK_NL_FLAG_NEED_SB,
3737         },
3738         {
3739                 .cmd = DEVLINK_CMD_ESWITCH_GET,
3740                 .doit = devlink_nl_cmd_eswitch_get_doit,
3741                 .policy = devlink_nl_policy,
3742                 .flags = GENL_ADMIN_PERM,
3743                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3744         },
3745         {
3746                 .cmd = DEVLINK_CMD_ESWITCH_SET,
3747                 .doit = devlink_nl_cmd_eswitch_set_doit,
3748                 .policy = devlink_nl_policy,
3749                 .flags = GENL_ADMIN_PERM,
3750                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3751                                   DEVLINK_NL_FLAG_NO_LOCK,
3752         },
3753         {
3754                 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
3755                 .doit = devlink_nl_cmd_dpipe_table_get,
3756                 .policy = devlink_nl_policy,
3757                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3758                 /* can be retrieved by unprivileged users */
3759         },
3760         {
3761                 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
3762                 .doit = devlink_nl_cmd_dpipe_entries_get,
3763                 .policy = devlink_nl_policy,
3764                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3765                 /* can be retrieved by unprivileged users */
3766         },
3767         {
3768                 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
3769                 .doit = devlink_nl_cmd_dpipe_headers_get,
3770                 .policy = devlink_nl_policy,
3771                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3772                 /* can be retrieved by unprivileged users */
3773         },
3774         {
3775                 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
3776                 .doit = devlink_nl_cmd_dpipe_table_counters_set,
3777                 .policy = devlink_nl_policy,
3778                 .flags = GENL_ADMIN_PERM,
3779                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3780         },
3781         {
3782                 .cmd = DEVLINK_CMD_RESOURCE_SET,
3783                 .doit = devlink_nl_cmd_resource_set,
3784                 .policy = devlink_nl_policy,
3785                 .flags = GENL_ADMIN_PERM,
3786                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3787         },
3788         {
3789                 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
3790                 .doit = devlink_nl_cmd_resource_dump,
3791                 .policy = devlink_nl_policy,
3792                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3793                 /* can be retrieved by unprivileged users */
3794         },
3795         {
3796                 .cmd = DEVLINK_CMD_RELOAD,
3797                 .doit = devlink_nl_cmd_reload,
3798                 .policy = devlink_nl_policy,
3799                 .flags = GENL_ADMIN_PERM,
3800                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3801                                   DEVLINK_NL_FLAG_NO_LOCK,
3802         },
3803         {
3804                 .cmd = DEVLINK_CMD_PARAM_GET,
3805                 .doit = devlink_nl_cmd_param_get_doit,
3806                 .dumpit = devlink_nl_cmd_param_get_dumpit,
3807                 .policy = devlink_nl_policy,
3808                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3809                 /* can be retrieved by unprivileged users */
3810         },
3811         {
3812                 .cmd = DEVLINK_CMD_PARAM_SET,
3813                 .doit = devlink_nl_cmd_param_set_doit,
3814                 .policy = devlink_nl_policy,
3815                 .flags = GENL_ADMIN_PERM,
3816                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3817         },
3818         {
3819                 .cmd = DEVLINK_CMD_REGION_GET,
3820                 .doit = devlink_nl_cmd_region_get_doit,
3821                 .dumpit = devlink_nl_cmd_region_get_dumpit,
3822                 .policy = devlink_nl_policy,
3823                 .flags = GENL_ADMIN_PERM,
3824                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3825         },
3826         {
3827                 .cmd = DEVLINK_CMD_REGION_DEL,
3828                 .doit = devlink_nl_cmd_region_del,
3829                 .policy = devlink_nl_policy,
3830                 .flags = GENL_ADMIN_PERM,
3831                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3832         },
3833         {
3834                 .cmd = DEVLINK_CMD_REGION_READ,
3835                 .dumpit = devlink_nl_cmd_region_read_dumpit,
3836                 .policy = devlink_nl_policy,
3837                 .flags = GENL_ADMIN_PERM,
3838                 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3839         },
3840 };
3841
3842 static struct genl_family devlink_nl_family __ro_after_init = {
3843         .name           = DEVLINK_GENL_NAME,
3844         .version        = DEVLINK_GENL_VERSION,
3845         .maxattr        = DEVLINK_ATTR_MAX,
3846         .netnsok        = true,
3847         .pre_doit       = devlink_nl_pre_doit,
3848         .post_doit      = devlink_nl_post_doit,
3849         .module         = THIS_MODULE,
3850         .ops            = devlink_nl_ops,
3851         .n_ops          = ARRAY_SIZE(devlink_nl_ops),
3852         .mcgrps         = devlink_nl_mcgrps,
3853         .n_mcgrps       = ARRAY_SIZE(devlink_nl_mcgrps),
3854 };
3855
3856 /**
3857  *      devlink_alloc - Allocate new devlink instance resources
3858  *
3859  *      @ops: ops
3860  *      @priv_size: size of user private data
3861  *
3862  *      Allocate new devlink instance resources, including devlink index
3863  *      and name.
3864  */
3865 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
3866 {
3867         struct devlink *devlink;
3868
3869         devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
3870         if (!devlink)
3871                 return NULL;
3872         devlink->ops = ops;
3873         devlink_net_set(devlink, &init_net);
3874         INIT_LIST_HEAD(&devlink->port_list);
3875         INIT_LIST_HEAD(&devlink->sb_list);
3876         INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
3877         INIT_LIST_HEAD(&devlink->resource_list);
3878         INIT_LIST_HEAD(&devlink->param_list);
3879         INIT_LIST_HEAD(&devlink->region_list);
3880         mutex_init(&devlink->lock);
3881         return devlink;
3882 }
3883 EXPORT_SYMBOL_GPL(devlink_alloc);
3884
3885 /**
3886  *      devlink_register - Register devlink instance
3887  *
3888  *      @devlink: devlink
3889  */
3890 int devlink_register(struct devlink *devlink, struct device *dev)
3891 {
3892         mutex_lock(&devlink_mutex);
3893         devlink->dev = dev;
3894         list_add_tail(&devlink->list, &devlink_list);
3895         devlink_notify(devlink, DEVLINK_CMD_NEW);
3896         mutex_unlock(&devlink_mutex);
3897         return 0;
3898 }
3899 EXPORT_SYMBOL_GPL(devlink_register);
3900
3901 /**
3902  *      devlink_unregister - Unregister devlink instance
3903  *
3904  *      @devlink: devlink
3905  */
3906 void devlink_unregister(struct devlink *devlink)
3907 {
3908         mutex_lock(&devlink_mutex);
3909         devlink_notify(devlink, DEVLINK_CMD_DEL);
3910         list_del(&devlink->list);
3911         mutex_unlock(&devlink_mutex);
3912 }
3913 EXPORT_SYMBOL_GPL(devlink_unregister);
3914
3915 /**
3916  *      devlink_free - Free devlink instance resources
3917  *
3918  *      @devlink: devlink
3919  */
3920 void devlink_free(struct devlink *devlink)
3921 {
3922         kfree(devlink);
3923 }
3924 EXPORT_SYMBOL_GPL(devlink_free);
3925
3926 /**
3927  *      devlink_port_register - Register devlink port
3928  *
3929  *      @devlink: devlink
3930  *      @devlink_port: devlink port
3931  *      @port_index
3932  *
3933  *      Register devlink port with provided port index. User can use
3934  *      any indexing, even hw-related one. devlink_port structure
3935  *      is convenient to be embedded inside user driver private structure.
3936  *      Note that the caller should take care of zeroing the devlink_port
3937  *      structure.
3938  */
3939 int devlink_port_register(struct devlink *devlink,
3940                           struct devlink_port *devlink_port,
3941                           unsigned int port_index)
3942 {
3943         mutex_lock(&devlink->lock);
3944         if (devlink_port_index_exists(devlink, port_index)) {
3945                 mutex_unlock(&devlink->lock);
3946                 return -EEXIST;
3947         }
3948         devlink_port->devlink = devlink;
3949         devlink_port->index = port_index;
3950         devlink_port->registered = true;
3951         list_add_tail(&devlink_port->list, &devlink->port_list);
3952         mutex_unlock(&devlink->lock);
3953         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
3954         return 0;
3955 }
3956 EXPORT_SYMBOL_GPL(devlink_port_register);
3957
3958 /**
3959  *      devlink_port_unregister - Unregister devlink port
3960  *
3961  *      @devlink_port: devlink port
3962  */
3963 void devlink_port_unregister(struct devlink_port *devlink_port)
3964 {
3965         struct devlink *devlink = devlink_port->devlink;
3966
3967         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
3968         mutex_lock(&devlink->lock);
3969         list_del(&devlink_port->list);
3970         mutex_unlock(&devlink->lock);
3971 }
3972 EXPORT_SYMBOL_GPL(devlink_port_unregister);
3973
3974 static void __devlink_port_type_set(struct devlink_port *devlink_port,
3975                                     enum devlink_port_type type,
3976                                     void *type_dev)
3977 {
3978         devlink_port->type = type;
3979         devlink_port->type_dev = type_dev;
3980         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
3981 }
3982
3983 /**
3984  *      devlink_port_type_eth_set - Set port type to Ethernet
3985  *
3986  *      @devlink_port: devlink port
3987  *      @netdev: related netdevice
3988  */
3989 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
3990                                struct net_device *netdev)
3991 {
3992         return __devlink_port_type_set(devlink_port,
3993                                        DEVLINK_PORT_TYPE_ETH, netdev);
3994 }
3995 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
3996
3997 /**
3998  *      devlink_port_type_ib_set - Set port type to InfiniBand
3999  *
4000  *      @devlink_port: devlink port
4001  *      @ibdev: related IB device
4002  */
4003 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
4004                               struct ib_device *ibdev)
4005 {
4006         return __devlink_port_type_set(devlink_port,
4007                                        DEVLINK_PORT_TYPE_IB, ibdev);
4008 }
4009 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
4010
4011 /**
4012  *      devlink_port_type_clear - Clear port type
4013  *
4014  *      @devlink_port: devlink port
4015  */
4016 void devlink_port_type_clear(struct devlink_port *devlink_port)
4017 {
4018         return __devlink_port_type_set(devlink_port,
4019                                        DEVLINK_PORT_TYPE_NOTSET, NULL);
4020 }
4021 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
4022
4023 /**
4024  *      devlink_port_attrs_set - Set port attributes
4025  *
4026  *      @devlink_port: devlink port
4027  *      @flavour: flavour of the port
4028  *      @port_number: number of the port that is facing user, for example
4029  *                    the front panel port number
4030  *      @split: indicates if this is split port
4031  *      @split_subport_number: if the port is split, this is the number
4032  *                             of subport.
4033  */
4034 void devlink_port_attrs_set(struct devlink_port *devlink_port,
4035                             enum devlink_port_flavour flavour,
4036                             u32 port_number, bool split,
4037                             u32 split_subport_number)
4038 {
4039         struct devlink_port_attrs *attrs = &devlink_port->attrs;
4040
4041         attrs->set = true;
4042         attrs->flavour = flavour;
4043         attrs->port_number = port_number;
4044         attrs->split = split;
4045         attrs->split_subport_number = split_subport_number;
4046         devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
4047 }
4048 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
4049
4050 int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
4051                                     char *name, size_t len)
4052 {
4053         struct devlink_port_attrs *attrs = &devlink_port->attrs;
4054         int n = 0;
4055
4056         if (!attrs->set)
4057                 return -EOPNOTSUPP;
4058
4059         switch (attrs->flavour) {
4060         case DEVLINK_PORT_FLAVOUR_PHYSICAL:
4061                 if (!attrs->split)
4062                         n = snprintf(name, len, "p%u", attrs->port_number);
4063                 else
4064                         n = snprintf(name, len, "p%us%u", attrs->port_number,
4065                                      attrs->split_subport_number);
4066                 break;
4067         case DEVLINK_PORT_FLAVOUR_CPU:
4068         case DEVLINK_PORT_FLAVOUR_DSA:
4069                 /* As CPU and DSA ports do not have a netdevice associated
4070                  * case should not ever happen.
4071                  */
4072                 WARN_ON(1);
4073                 return -EINVAL;
4074         }
4075
4076         if (n >= len)
4077                 return -EINVAL;
4078
4079         return 0;
4080 }
4081 EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
4082
4083 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
4084                         u32 size, u16 ingress_pools_count,
4085                         u16 egress_pools_count, u16 ingress_tc_count,
4086                         u16 egress_tc_count)
4087 {
4088         struct devlink_sb *devlink_sb;
4089         int err = 0;
4090
4091         mutex_lock(&devlink->lock);
4092         if (devlink_sb_index_exists(devlink, sb_index)) {
4093                 err = -EEXIST;
4094                 goto unlock;
4095         }
4096
4097         devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
4098         if (!devlink_sb) {
4099                 err = -ENOMEM;
4100                 goto unlock;
4101         }
4102         devlink_sb->index = sb_index;
4103         devlink_sb->size = size;
4104         devlink_sb->ingress_pools_count = ingress_pools_count;
4105         devlink_sb->egress_pools_count = egress_pools_count;
4106         devlink_sb->ingress_tc_count = ingress_tc_count;
4107         devlink_sb->egress_tc_count = egress_tc_count;
4108         list_add_tail(&devlink_sb->list, &devlink->sb_list);
4109 unlock:
4110         mutex_unlock(&devlink->lock);
4111         return err;
4112 }
4113 EXPORT_SYMBOL_GPL(devlink_sb_register);
4114
4115 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
4116 {
4117         struct devlink_sb *devlink_sb;
4118
4119         mutex_lock(&devlink->lock);
4120         devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
4121         WARN_ON(!devlink_sb);
4122         list_del(&devlink_sb->list);
4123         mutex_unlock(&devlink->lock);
4124         kfree(devlink_sb);
4125 }
4126 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
4127
4128 /**
4129  *      devlink_dpipe_headers_register - register dpipe headers
4130  *
4131  *      @devlink: devlink
4132  *      @dpipe_headers: dpipe header array
4133  *
4134  *      Register the headers supported by hardware.
4135  */
4136 int devlink_dpipe_headers_register(struct devlink *devlink,
4137                                    struct devlink_dpipe_headers *dpipe_headers)
4138 {
4139         mutex_lock(&devlink->lock);
4140         devlink->dpipe_headers = dpipe_headers;
4141         mutex_unlock(&devlink->lock);
4142         return 0;
4143 }
4144 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
4145
4146 /**
4147  *      devlink_dpipe_headers_unregister - unregister dpipe headers
4148  *
4149  *      @devlink: devlink
4150  *
4151  *      Unregister the headers supported by hardware.
4152  */
4153 void devlink_dpipe_headers_unregister(struct devlink *devlink)
4154 {
4155         mutex_lock(&devlink->lock);
4156         devlink->dpipe_headers = NULL;
4157         mutex_unlock(&devlink->lock);
4158 }
4159 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
4160
4161 /**
4162  *      devlink_dpipe_table_counter_enabled - check if counter allocation
4163  *                                            required
4164  *      @devlink: devlink
4165  *      @table_name: tables name
4166  *
4167  *      Used by driver to check if counter allocation is required.
4168  *      After counter allocation is turned on the table entries
4169  *      are updated to include counter statistics.
4170  *
4171  *      After that point on the driver must respect the counter
4172  *      state so that each entry added to the table is added
4173  *      with a counter.
4174  */
4175 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
4176                                          const char *table_name)
4177 {
4178         struct devlink_dpipe_table *table;
4179         bool enabled;
4180
4181         rcu_read_lock();
4182         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4183                                          table_name);
4184         enabled = false;
4185         if (table)
4186                 enabled = table->counters_enabled;
4187         rcu_read_unlock();
4188         return enabled;
4189 }
4190 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
4191
4192 /**
4193  *      devlink_dpipe_table_register - register dpipe table
4194  *
4195  *      @devlink: devlink
4196  *      @table_name: table name
4197  *      @table_ops: table ops
4198  *      @priv: priv
4199  *      @counter_control_extern: external control for counters
4200  */
4201 int devlink_dpipe_table_register(struct devlink *devlink,
4202                                  const char *table_name,
4203                                  struct devlink_dpipe_table_ops *table_ops,
4204                                  void *priv, bool counter_control_extern)
4205 {
4206         struct devlink_dpipe_table *table;
4207
4208         if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
4209                 return -EEXIST;
4210
4211         if (WARN_ON(!table_ops->size_get))
4212                 return -EINVAL;
4213
4214         table = kzalloc(sizeof(*table), GFP_KERNEL);
4215         if (!table)
4216                 return -ENOMEM;
4217
4218         table->name = table_name;
4219         table->table_ops = table_ops;
4220         table->priv = priv;
4221         table->counter_control_extern = counter_control_extern;
4222
4223         mutex_lock(&devlink->lock);
4224         list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
4225         mutex_unlock(&devlink->lock);
4226         return 0;
4227 }
4228 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
4229
4230 /**
4231  *      devlink_dpipe_table_unregister - unregister dpipe table
4232  *
4233  *      @devlink: devlink
4234  *      @table_name: table name
4235  */
4236 void devlink_dpipe_table_unregister(struct devlink *devlink,
4237                                     const char *table_name)
4238 {
4239         struct devlink_dpipe_table *table;
4240
4241         mutex_lock(&devlink->lock);
4242         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4243                                          table_name);
4244         if (!table)
4245                 goto unlock;
4246         list_del_rcu(&table->list);
4247         mutex_unlock(&devlink->lock);
4248         kfree_rcu(table, rcu);
4249         return;
4250 unlock:
4251         mutex_unlock(&devlink->lock);
4252 }
4253 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
4254
4255 /**
4256  *      devlink_resource_register - devlink resource register
4257  *
4258  *      @devlink: devlink
4259  *      @resource_name: resource's name
4260  *      @top_hierarchy: top hierarchy
4261  *      @reload_required: reload is required for new configuration to
4262  *                        apply
4263  *      @resource_size: resource's size
4264  *      @resource_id: resource's id
4265  *      @parent_reosurce_id: resource's parent id
4266  *      @size params: size parameters
4267  */
4268 int devlink_resource_register(struct devlink *devlink,
4269                               const char *resource_name,
4270                               u64 resource_size,
4271                               u64 resource_id,
4272                               u64 parent_resource_id,
4273                               const struct devlink_resource_size_params *size_params)
4274 {
4275         struct devlink_resource *resource;
4276         struct list_head *resource_list;
4277         bool top_hierarchy;
4278         int err = 0;
4279
4280         top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
4281
4282         mutex_lock(&devlink->lock);
4283         resource = devlink_resource_find(devlink, NULL, resource_id);
4284         if (resource) {
4285                 err = -EINVAL;
4286                 goto out;
4287         }
4288
4289         resource = kzalloc(sizeof(*resource), GFP_KERNEL);
4290         if (!resource) {
4291                 err = -ENOMEM;
4292                 goto out;
4293         }
4294
4295         if (top_hierarchy) {
4296                 resource_list = &devlink->resource_list;
4297         } else {
4298                 struct devlink_resource *parent_resource;
4299
4300                 parent_resource = devlink_resource_find(devlink, NULL,
4301                                                         parent_resource_id);
4302                 if (parent_resource) {
4303                         resource_list = &parent_resource->resource_list;
4304                         resource->parent = parent_resource;
4305                 } else {
4306                         kfree(resource);
4307                         err = -EINVAL;
4308                         goto out;
4309                 }
4310         }
4311
4312         resource->name = resource_name;
4313         resource->size = resource_size;
4314         resource->size_new = resource_size;
4315         resource->id = resource_id;
4316         resource->size_valid = true;
4317         memcpy(&resource->size_params, size_params,
4318                sizeof(resource->size_params));
4319         INIT_LIST_HEAD(&resource->resource_list);
4320         list_add_tail(&resource->list, resource_list);
4321 out:
4322         mutex_unlock(&devlink->lock);
4323         return err;
4324 }
4325 EXPORT_SYMBOL_GPL(devlink_resource_register);
4326
4327 /**
4328  *      devlink_resources_unregister - free all resources
4329  *
4330  *      @devlink: devlink
4331  *      @resource: resource
4332  */
4333 void devlink_resources_unregister(struct devlink *devlink,
4334                                   struct devlink_resource *resource)
4335 {
4336         struct devlink_resource *tmp, *child_resource;
4337         struct list_head *resource_list;
4338
4339         if (resource)
4340                 resource_list = &resource->resource_list;
4341         else
4342                 resource_list = &devlink->resource_list;
4343
4344         if (!resource)
4345                 mutex_lock(&devlink->lock);
4346
4347         list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
4348                 devlink_resources_unregister(devlink, child_resource);
4349                 list_del(&child_resource->list);
4350                 kfree(child_resource);
4351         }
4352
4353         if (!resource)
4354                 mutex_unlock(&devlink->lock);
4355 }
4356 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
4357
4358 /**
4359  *      devlink_resource_size_get - get and update size
4360  *
4361  *      @devlink: devlink
4362  *      @resource_id: the requested resource id
4363  *      @p_resource_size: ptr to update
4364  */
4365 int devlink_resource_size_get(struct devlink *devlink,
4366                               u64 resource_id,
4367                               u64 *p_resource_size)
4368 {
4369         struct devlink_resource *resource;
4370         int err = 0;
4371
4372         mutex_lock(&devlink->lock);
4373         resource = devlink_resource_find(devlink, NULL, resource_id);
4374         if (!resource) {
4375                 err = -EINVAL;
4376                 goto out;
4377         }
4378         *p_resource_size = resource->size_new;
4379         resource->size = resource->size_new;
4380 out:
4381         mutex_unlock(&devlink->lock);
4382         return err;
4383 }
4384 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
4385
4386 /**
4387  *      devlink_dpipe_table_resource_set - set the resource id
4388  *
4389  *      @devlink: devlink
4390  *      @table_name: table name
4391  *      @resource_id: resource id
4392  *      @resource_units: number of resource's units consumed per table's entry
4393  */
4394 int devlink_dpipe_table_resource_set(struct devlink *devlink,
4395                                      const char *table_name, u64 resource_id,
4396                                      u64 resource_units)
4397 {
4398         struct devlink_dpipe_table *table;
4399         int err = 0;
4400
4401         mutex_lock(&devlink->lock);
4402         table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4403                                          table_name);
4404         if (!table) {
4405                 err = -EINVAL;
4406                 goto out;
4407         }
4408         table->resource_id = resource_id;
4409         table->resource_units = resource_units;
4410         table->resource_valid = true;
4411 out:
4412         mutex_unlock(&devlink->lock);
4413         return err;
4414 }
4415 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
4416
4417 /**
4418  *      devlink_resource_occ_get_register - register occupancy getter
4419  *
4420  *      @devlink: devlink
4421  *      @resource_id: resource id
4422  *      @occ_get: occupancy getter callback
4423  *      @occ_get_priv: occupancy getter callback priv
4424  */
4425 void devlink_resource_occ_get_register(struct devlink *devlink,
4426                                        u64 resource_id,
4427                                        devlink_resource_occ_get_t *occ_get,
4428                                        void *occ_get_priv)
4429 {
4430         struct devlink_resource *resource;
4431
4432         mutex_lock(&devlink->lock);
4433         resource = devlink_resource_find(devlink, NULL, resource_id);
4434         if (WARN_ON(!resource))
4435                 goto out;
4436         WARN_ON(resource->occ_get);
4437
4438         resource->occ_get = occ_get;
4439         resource->occ_get_priv = occ_get_priv;
4440 out:
4441         mutex_unlock(&devlink->lock);
4442 }
4443 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
4444
4445 /**
4446  *      devlink_resource_occ_get_unregister - unregister occupancy getter
4447  *
4448  *      @devlink: devlink
4449  *      @resource_id: resource id
4450  */
4451 void devlink_resource_occ_get_unregister(struct devlink *devlink,
4452                                          u64 resource_id)
4453 {
4454         struct devlink_resource *resource;
4455
4456         mutex_lock(&devlink->lock);
4457         resource = devlink_resource_find(devlink, NULL, resource_id);
4458         if (WARN_ON(!resource))
4459                 goto out;
4460         WARN_ON(!resource->occ_get);
4461
4462         resource->occ_get = NULL;
4463         resource->occ_get_priv = NULL;
4464 out:
4465         mutex_unlock(&devlink->lock);
4466 }
4467 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
4468
4469 /**
4470  *      devlink_params_register - register configuration parameters
4471  *
4472  *      @devlink: devlink
4473  *      @params: configuration parameters array
4474  *      @params_count: number of parameters provided
4475  *
4476  *      Register the configuration parameters supported by the driver.
4477  */
4478 int devlink_params_register(struct devlink *devlink,
4479                             const struct devlink_param *params,
4480                             size_t params_count)
4481 {
4482         const struct devlink_param *param = params;
4483         int i;
4484         int err;
4485
4486         mutex_lock(&devlink->lock);
4487         for (i = 0; i < params_count; i++, param++) {
4488                 if (!param || !param->name || !param->supported_cmodes) {
4489                         err = -EINVAL;
4490                         goto rollback;
4491                 }
4492                 if (param->generic) {
4493                         err = devlink_param_generic_verify(param);
4494                         if (err)
4495                                 goto rollback;
4496                 } else {
4497                         err = devlink_param_driver_verify(param);
4498                         if (err)
4499                                 goto rollback;
4500                 }
4501                 err = devlink_param_register_one(devlink, param);
4502                 if (err)
4503                         goto rollback;
4504         }
4505
4506         mutex_unlock(&devlink->lock);
4507         return 0;
4508
4509 rollback:
4510         if (!i)
4511                 goto unlock;
4512         for (param--; i > 0; i--, param--)
4513                 devlink_param_unregister_one(devlink, param);
4514 unlock:
4515         mutex_unlock(&devlink->lock);
4516         return err;
4517 }
4518 EXPORT_SYMBOL_GPL(devlink_params_register);
4519
4520 /**
4521  *      devlink_params_unregister - unregister configuration parameters
4522  *      @devlink: devlink
4523  *      @params: configuration parameters to unregister
4524  *      @params_count: number of parameters provided
4525  */
4526 void devlink_params_unregister(struct devlink *devlink,
4527                                const struct devlink_param *params,
4528                                size_t params_count)
4529 {
4530         const struct devlink_param *param = params;
4531         int i;
4532
4533         mutex_lock(&devlink->lock);
4534         for (i = 0; i < params_count; i++, param++)
4535                 devlink_param_unregister_one(devlink, param);
4536         mutex_unlock(&devlink->lock);
4537 }
4538 EXPORT_SYMBOL_GPL(devlink_params_unregister);
4539
4540 /**
4541  *      devlink_param_driverinit_value_get - get configuration parameter
4542  *                                           value for driver initializing
4543  *
4544  *      @devlink: devlink
4545  *      @param_id: parameter ID
4546  *      @init_val: value of parameter in driverinit configuration mode
4547  *
4548  *      This function should be used by the driver to get driverinit
4549  *      configuration for initialization after reload command.
4550  */
4551 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
4552                                        union devlink_param_value *init_val)
4553 {
4554         struct devlink_param_item *param_item;
4555
4556         if (!devlink->ops || !devlink->ops->reload)
4557                 return -EOPNOTSUPP;
4558
4559         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4560         if (!param_item)
4561                 return -EINVAL;
4562
4563         if (!param_item->driverinit_value_valid ||
4564             !devlink_param_cmode_is_supported(param_item->param,
4565                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
4566                 return -EOPNOTSUPP;
4567
4568         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
4569                 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
4570         else
4571                 *init_val = param_item->driverinit_value;
4572
4573         return 0;
4574 }
4575 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
4576
4577 /**
4578  *      devlink_param_driverinit_value_set - set value of configuration
4579  *                                           parameter for driverinit
4580  *                                           configuration mode
4581  *
4582  *      @devlink: devlink
4583  *      @param_id: parameter ID
4584  *      @init_val: value of parameter to set for driverinit configuration mode
4585  *
4586  *      This function should be used by the driver to set driverinit
4587  *      configuration mode default value.
4588  */
4589 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
4590                                        union devlink_param_value init_val)
4591 {
4592         struct devlink_param_item *param_item;
4593
4594         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4595         if (!param_item)
4596                 return -EINVAL;
4597
4598         if (!devlink_param_cmode_is_supported(param_item->param,
4599                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
4600                 return -EOPNOTSUPP;
4601
4602         if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
4603                 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
4604         else
4605                 param_item->driverinit_value = init_val;
4606         param_item->driverinit_value_valid = true;
4607
4608         devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
4609         return 0;
4610 }
4611 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
4612
4613 /**
4614  *      devlink_param_value_changed - notify devlink on a parameter's value
4615  *                                    change. Should be called by the driver
4616  *                                    right after the change.
4617  *
4618  *      @devlink: devlink
4619  *      @param_id: parameter ID
4620  *
4621  *      This function should be used by the driver to notify devlink on value
4622  *      change, excluding driverinit configuration mode.
4623  *      For driverinit configuration mode driver should use the function
4624  *      devlink_param_driverinit_value_set() instead.
4625  */
4626 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
4627 {
4628         struct devlink_param_item *param_item;
4629
4630         param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4631         WARN_ON(!param_item);
4632
4633         devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
4634 }
4635 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
4636
4637 /**
4638  *      devlink_param_value_str_fill - Safely fill-up the string preventing
4639  *                                     from overflow of the preallocated buffer
4640  *
4641  *      @dst_val: destination devlink_param_value
4642  *      @src: source buffer
4643  */
4644 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
4645                                   const char *src)
4646 {
4647         size_t len;
4648
4649         len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
4650         WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
4651 }
4652 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
4653
4654 /**
4655  *      devlink_region_create - create a new address region
4656  *
4657  *      @devlink: devlink
4658  *      @region_name: region name
4659  *      @region_max_snapshots: Maximum supported number of snapshots for region
4660  *      @region_size: size of region
4661  */
4662 struct devlink_region *devlink_region_create(struct devlink *devlink,
4663                                              const char *region_name,
4664                                              u32 region_max_snapshots,
4665                                              u64 region_size)
4666 {
4667         struct devlink_region *region;
4668         int err = 0;
4669
4670         mutex_lock(&devlink->lock);
4671
4672         if (devlink_region_get_by_name(devlink, region_name)) {
4673                 err = -EEXIST;
4674                 goto unlock;
4675         }
4676
4677         region = kzalloc(sizeof(*region), GFP_KERNEL);
4678         if (!region) {
4679                 err = -ENOMEM;
4680                 goto unlock;
4681         }
4682
4683         region->devlink = devlink;
4684         region->max_snapshots = region_max_snapshots;
4685         region->name = region_name;
4686         region->size = region_size;
4687         INIT_LIST_HEAD(&region->snapshot_list);
4688         list_add_tail(&region->list, &devlink->region_list);
4689         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
4690
4691         mutex_unlock(&devlink->lock);
4692         return region;
4693
4694 unlock:
4695         mutex_unlock(&devlink->lock);
4696         return ERR_PTR(err);
4697 }
4698 EXPORT_SYMBOL_GPL(devlink_region_create);
4699
4700 /**
4701  *      devlink_region_destroy - destroy address region
4702  *
4703  *      @region: devlink region to destroy
4704  */
4705 void devlink_region_destroy(struct devlink_region *region)
4706 {
4707         struct devlink *devlink = region->devlink;
4708         struct devlink_snapshot *snapshot, *ts;
4709
4710         mutex_lock(&devlink->lock);
4711
4712         /* Free all snapshots of region */
4713         list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
4714                 devlink_region_snapshot_del(snapshot);
4715
4716         list_del(&region->list);
4717
4718         devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
4719         mutex_unlock(&devlink->lock);
4720         kfree(region);
4721 }
4722 EXPORT_SYMBOL_GPL(devlink_region_destroy);
4723
4724 /**
4725  *      devlink_region_shapshot_id_get - get snapshot ID
4726  *
4727  *      This callback should be called when adding a new snapshot,
4728  *      Driver should use the same id for multiple snapshots taken
4729  *      on multiple regions at the same time/by the same trigger.
4730  *
4731  *      @devlink: devlink
4732  */
4733 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
4734 {
4735         u32 id;
4736
4737         mutex_lock(&devlink->lock);
4738         id = ++devlink->snapshot_id;
4739         mutex_unlock(&devlink->lock);
4740
4741         return id;
4742 }
4743 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
4744
4745 /**
4746  *      devlink_region_snapshot_create - create a new snapshot
4747  *      This will add a new snapshot of a region. The snapshot
4748  *      will be stored on the region struct and can be accessed
4749  *      from devlink. This is useful for future analyses of snapshots.
4750  *      Multiple snapshots can be created on a region.
4751  *      The @snapshot_id should be obtained using the getter function.
4752  *
4753  *      @devlink_region: devlink region of the snapshot
4754  *      @data_len: size of snapshot data
4755  *      @data: snapshot data
4756  *      @snapshot_id: snapshot id to be created
4757  *      @data_destructor: pointer to destructor function to free data
4758  */
4759 int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
4760                                    u8 *data, u32 snapshot_id,
4761                                    devlink_snapshot_data_dest_t *data_destructor)
4762 {
4763         struct devlink *devlink = region->devlink;
4764         struct devlink_snapshot *snapshot;
4765         int err;
4766
4767         mutex_lock(&devlink->lock);
4768
4769         /* check if region can hold one more snapshot */
4770         if (region->cur_snapshots == region->max_snapshots) {
4771                 err = -ENOMEM;
4772                 goto unlock;
4773         }
4774
4775         if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4776                 err = -EEXIST;
4777                 goto unlock;
4778         }
4779
4780         snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
4781         if (!snapshot) {
4782                 err = -ENOMEM;
4783                 goto unlock;
4784         }
4785
4786         snapshot->id = snapshot_id;
4787         snapshot->region = region;
4788         snapshot->data = data;
4789         snapshot->data_len = data_len;
4790         snapshot->data_destructor = data_destructor;
4791
4792         list_add_tail(&snapshot->list, &region->snapshot_list);
4793
4794         region->cur_snapshots++;
4795
4796         devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
4797         mutex_unlock(&devlink->lock);
4798         return 0;
4799
4800 unlock:
4801         mutex_unlock(&devlink->lock);
4802         return err;
4803 }
4804 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
4805
4806 static int __init devlink_module_init(void)
4807 {
4808         return genl_register_family(&devlink_nl_family);
4809 }
4810
4811 static void __exit devlink_module_exit(void)
4812 {
4813         genl_unregister_family(&devlink_nl_family);
4814 }
4815
4816 module_init(devlink_module_init);
4817 module_exit(devlink_module_exit);
4818
4819 MODULE_LICENSE("GPL v2");
4820 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
4821 MODULE_DESCRIPTION("Network physical device Netlink interface");
4822 MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME);