net/ncsi/ncsi-netlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright Samuel Mendoza-Jonas, IBM Corporation 2018.
   4  */
   5
   6 #include <linux/module.h>
   7 #include <linux/kernel.h>
   8 #include <linux/if_arp.h>
   9 #include <linux/rtnetlink.h>
  10 #include <linux/etherdevice.h>
  11 #include <net/genetlink.h>
  12 #include <net/ncsi.h>
  13 #include <linux/skbuff.h>
  14 #include <net/sock.h>
  15 #include <uapi/linux/ncsi.h>
  16
  17 #include "internal.h"
  18 #include "ncsi-pkt.h"
  19 #include "ncsi-netlink.h"
  20
  21 static struct genl_family ncsi_genl_family;
  22
  23 static const struct nla_policy ncsi_genl_policy[NCSI_ATTR_MAX + 1] = {
  24         [NCSI_ATTR_IFINDEX] =           { .type = NLA_U32 },
  25         [NCSI_ATTR_PACKAGE_LIST] =      { .type = NLA_NESTED },
  26         [NCSI_ATTR_PACKAGE_ID] =        { .type = NLA_U32 },
  27         [NCSI_ATTR_CHANNEL_ID] =        { .type = NLA_U32 },
  28         [NCSI_ATTR_DATA] =              { .type = NLA_BINARY, .len = 2048 },
  29         [NCSI_ATTR_MULTI_FLAG] =        { .type = NLA_FLAG },
  30         [NCSI_ATTR_PACKAGE_MASK] =      { .type = NLA_U32 },
  31         [NCSI_ATTR_CHANNEL_MASK] =      { .type = NLA_U32 },
  32 };
  33
  34 static struct ncsi_dev_priv *ndp_from_ifindex(struct net *net, u32 ifindex)
  35 {
  36         struct ncsi_dev_priv *ndp;
  37         struct net_device *dev;
  38         struct ncsi_dev *nd;
  39         struct ncsi_dev;
  40
  41         if (!net)
  42                 return NULL;
  43
  44         dev = dev_get_by_index(net, ifindex);
  45         if (!dev) {
  46                 pr_err("NCSI netlink: No device for ifindex %u\n", ifindex);
  47                 return NULL;
  48         }
  49
  50         nd = ncsi_find_dev(dev);
  51         ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
  52
  53         dev_put(dev);
  54         return ndp;
  55 }
  56
  57 static int ncsi_write_channel_info(struct sk_buff *skb,
  58                                    struct ncsi_dev_priv *ndp,
  59                                    struct ncsi_channel *nc)
  60 {
  61         struct ncsi_channel_vlan_filter *ncf;
  62         struct ncsi_channel_mode *m;
  63         struct nlattr *vid_nest;
  64         int i;
  65
  66         nla_put_u32(skb, NCSI_CHANNEL_ATTR_ID, nc->id);
  67         m = &nc->modes[NCSI_MODE_LINK];
  68         nla_put_u32(skb, NCSI_CHANNEL_ATTR_LINK_STATE, m->data[2]);
  69         if (nc->state == NCSI_CHANNEL_ACTIVE)
  70                 nla_put_flag(skb, NCSI_CHANNEL_ATTR_ACTIVE);
  71         if (nc == nc->package->preferred_channel)
  72                 nla_put_flag(skb, NCSI_CHANNEL_ATTR_FORCED);
  73
  74         nla_put_u32(skb, NCSI_CHANNEL_ATTR_VERSION_MAJOR, nc->version.version);
  75         nla_put_u32(skb, NCSI_CHANNEL_ATTR_VERSION_MINOR, nc->version.alpha2);
  76         nla_put_string(skb, NCSI_CHANNEL_ATTR_VERSION_STR, nc->version.fw_name);
  77
  78         vid_nest = nla_nest_start_noflag(skb, NCSI_CHANNEL_ATTR_VLAN_LIST);
  79         if (!vid_nest)
  80                 return -ENOMEM;
  81         ncf = &nc->vlan_filter;
  82         i = -1;
  83         while ((i = find_next_bit((void *)&ncf->bitmap, ncf->n_vids,
  84                                   i + 1)) < ncf->n_vids) {
  85                 if (ncf->vids[i])
  86                         nla_put_u16(skb, NCSI_CHANNEL_ATTR_VLAN_ID,
  87                                     ncf->vids[i]);
  88         }
  89         nla_nest_end(skb, vid_nest);
  90
  91         return 0;
  92 }
  93
  94 static int ncsi_write_package_info(struct sk_buff *skb,
  95                                    struct ncsi_dev_priv *ndp, unsigned int id)
  96 {
  97         struct nlattr *pnest, *cnest, *nest;
  98         struct ncsi_package *np;
  99         struct ncsi_channel *nc;
 100         bool found;
 101         int rc;
 102
 103         if (id > ndp->package_num - 1) {
 104                 netdev_info(ndp->ndev.dev, "NCSI: No package with id %u\n", id);
 105                 return -ENODEV;
 106         }
 107
 108         found = false;
 109         NCSI_FOR_EACH_PACKAGE(ndp, np) {
 110                 if (np->id != id)
 111                         continue;
 112                 pnest = nla_nest_start_noflag(skb, NCSI_PKG_ATTR);
 113                 if (!pnest)
 114                         return -ENOMEM;
 115                 rc = nla_put_u32(skb, NCSI_PKG_ATTR_ID, np->id);
 116                 if (rc) {
 117                         nla_nest_cancel(skb, pnest);
 118                         return rc;
 119                 }
 120                 if ((0x1 << np->id) == ndp->package_whitelist)
 121                         nla_put_flag(skb, NCSI_PKG_ATTR_FORCED);
 122                 cnest = nla_nest_start_noflag(skb, NCSI_PKG_ATTR_CHANNEL_LIST);
 123                 if (!cnest) {
 124                         nla_nest_cancel(skb, pnest);
 125                         return -ENOMEM;
 126                 }
 127                 NCSI_FOR_EACH_CHANNEL(np, nc) {
 128                         nest = nla_nest_start_noflag(skb, NCSI_CHANNEL_ATTR);
 129                         if (!nest) {
 130                                 nla_nest_cancel(skb, cnest);
 131                                 nla_nest_cancel(skb, pnest);
 132                                 return -ENOMEM;
 133                         }
 134                         rc = ncsi_write_channel_info(skb, ndp, nc);
 135                         if (rc) {
 136                                 nla_nest_cancel(skb, nest);
 137                                 nla_nest_cancel(skb, cnest);
 138                                 nla_nest_cancel(skb, pnest);
 139                                 return rc;
 140                         }
 141                         nla_nest_end(skb, nest);
 142                 }
 143                 nla_nest_end(skb, cnest);
 144                 nla_nest_end(skb, pnest);
 145                 found = true;
 146         }
 147
 148         if (!found)
 149                 return -ENODEV;
 150
 151         return 0;
 152 }
 153
 154 static int ncsi_pkg_info_nl(struct sk_buff *msg, struct genl_info *info)
 155 {
 156         struct ncsi_dev_priv *ndp;
 157         unsigned int package_id;
 158         struct sk_buff *skb;
 159         struct nlattr *attr;
 160         void *hdr;
 161         int rc;
 162
 163         if (!info || !info->attrs)
 164                 return -EINVAL;
 165
 166         if (!info->attrs[NCSI_ATTR_IFINDEX])
 167                 return -EINVAL;
 168
 169         if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
 170                 return -EINVAL;
 171
 172         ndp = ndp_from_ifindex(genl_info_net(info),
 173                                nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
 174         if (!ndp)
 175                 return -ENODEV;
 176
 177         skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 178         if (!skb)
 179                 return -ENOMEM;
 180
 181         hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
 182                           &ncsi_genl_family, 0, NCSI_CMD_PKG_INFO);
 183         if (!hdr) {
 184                 kfree_skb(skb);
 185                 return -EMSGSIZE;
 186         }
 187
 188         package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
 189
 190         attr = nla_nest_start_noflag(skb, NCSI_ATTR_PACKAGE_LIST);
 191         if (!attr) {
 192                 kfree_skb(skb);
 193                 return -EMSGSIZE;
 194         }
 195         rc = ncsi_write_package_info(skb, ndp, package_id);
 196
 197         if (rc) {
 198                 nla_nest_cancel(skb, attr);
 199                 goto err;
 200         }
 201
 202         nla_nest_end(skb, attr);
 203
 204         genlmsg_end(skb, hdr);
 205         return genlmsg_reply(skb, info);
 206
 207 err:
 208         kfree_skb(skb);
 209         return rc;
 210 }
 211
 212 static int ncsi_pkg_info_all_nl(struct sk_buff *skb,
 213                                 struct netlink_callback *cb)
 214 {
 215         struct nlattr *attrs[NCSI_ATTR_MAX + 1];
 216         struct ncsi_package *np, *package;
 217         struct ncsi_dev_priv *ndp;
 218         unsigned int package_id;
 219         struct nlattr *attr;
 220         void *hdr;
 221         int rc;
 222
 223         rc = genlmsg_parse_deprecated(cb->nlh, &ncsi_genl_family, attrs, NCSI_ATTR_MAX,
 224                                       ncsi_genl_policy, NULL);
 225         if (rc)
 226                 return rc;
 227
 228         if (!attrs[NCSI_ATTR_IFINDEX])
 229                 return -EINVAL;
 230
 231         ndp = ndp_from_ifindex(get_net(sock_net(skb->sk)),
 232                                nla_get_u32(attrs[NCSI_ATTR_IFINDEX]));
 233
 234         if (!ndp)
 235                 return -ENODEV;
 236
 237         package_id = cb->args[0];
 238         package = NULL;
 239         NCSI_FOR_EACH_PACKAGE(ndp, np)
 240                 if (np->id == package_id)
 241                         package = np;
 242
 243         if (!package)
 244                 return 0; /* done */
 245
 246         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 247                           &ncsi_genl_family, NLM_F_MULTI,  NCSI_CMD_PKG_INFO);
 248         if (!hdr) {
 249                 rc = -EMSGSIZE;
 250                 goto err;
 251         }
 252
 253         attr = nla_nest_start_noflag(skb, NCSI_ATTR_PACKAGE_LIST);
 254         if (!attr) {
 255                 rc = -EMSGSIZE;
 256                 goto err;
 257         }
 258         rc = ncsi_write_package_info(skb, ndp, package->id);
 259         if (rc) {
 260                 nla_nest_cancel(skb, attr);
 261                 goto err;
 262         }
 263
 264         nla_nest_end(skb, attr);
 265         genlmsg_end(skb, hdr);
 266
 267         cb->args[0] = package_id + 1;
 268
 269         return skb->len;
 270 err:
 271         genlmsg_cancel(skb, hdr);
 272         return rc;
 273 }
 274
 275 static int ncsi_set_interface_nl(struct sk_buff *msg, struct genl_info *info)
 276 {
 277         struct ncsi_package *np, *package;
 278         struct ncsi_channel *nc, *channel;
 279         u32 package_id, channel_id;
 280         struct ncsi_dev_priv *ndp;
 281         unsigned long flags;
 282
 283         if (!info || !info->attrs)
 284                 return -EINVAL;
 285
 286         if (!info->attrs[NCSI_ATTR_IFINDEX])
 287                 return -EINVAL;
 288
 289         if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
 290                 return -EINVAL;
 291
 292         ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
 293                                nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
 294         if (!ndp)
 295                 return -ENODEV;
 296
 297         package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
 298         package = NULL;
 299
 300         NCSI_FOR_EACH_PACKAGE(ndp, np)
 301                 if (np->id == package_id)
 302                         package = np;
 303         if (!package) {
 304                 /* The user has set a package that does not exist */
 305                 return -ERANGE;
 306         }
 307
 308         channel = NULL;
 309         if (info->attrs[NCSI_ATTR_CHANNEL_ID]) {
 310                 channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
 311                 NCSI_FOR_EACH_CHANNEL(package, nc)
 312                         if (nc->id == channel_id) {
 313                                 channel = nc;
 314                                 break;
 315                         }
 316                 if (!channel) {
 317                         netdev_info(ndp->ndev.dev,
 318                                     "NCSI: Channel %u does not exist!\n",
 319                                     channel_id);
 320                         return -ERANGE;
 321                 }
 322         }
 323
 324         spin_lock_irqsave(&ndp->lock, flags);
 325         ndp->package_whitelist = 0x1 << package->id;
 326         ndp->multi_package = false;
 327         spin_unlock_irqrestore(&ndp->lock, flags);
 328
 329         spin_lock_irqsave(&package->lock, flags);
 330         package->multi_channel = false;
 331         if (channel) {
 332                 package->channel_whitelist = 0x1 << channel->id;
 333                 package->preferred_channel = channel;
 334         } else {
 335                 /* Allow any channel */
 336                 package->channel_whitelist = UINT_MAX;
 337                 package->preferred_channel = NULL;
 338         }
 339         spin_unlock_irqrestore(&package->lock, flags);
 340
 341         if (channel)
 342                 netdev_info(ndp->ndev.dev,
 343                             "Set package 0x%x, channel 0x%x as preferred\n",
 344                             package_id, channel_id);
 345         else
 346                 netdev_info(ndp->ndev.dev, "Set package 0x%x as preferred\n",
 347                             package_id);
 348
 349         /* Update channel configuration */
 350         if (!(ndp->flags & NCSI_DEV_RESET))
 351                 ncsi_reset_dev(&ndp->ndev);
 352
 353         return 0;
 354 }
 355
 356 static int ncsi_clear_interface_nl(struct sk_buff *msg, struct genl_info *info)
 357 {
 358         struct ncsi_dev_priv *ndp;
 359         struct ncsi_package *np;
 360         unsigned long flags;
 361
 362         if (!info || !info->attrs)
 363                 return -EINVAL;
 364
 365         if (!info->attrs[NCSI_ATTR_IFINDEX])
 366                 return -EINVAL;
 367
 368         ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
 369                                nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
 370         if (!ndp)
 371                 return -ENODEV;
 372
 373         /* Reset any whitelists and disable multi mode */
 374         spin_lock_irqsave(&ndp->lock, flags);
 375         ndp->package_whitelist = UINT_MAX;
 376         ndp->multi_package = false;
 377         spin_unlock_irqrestore(&ndp->lock, flags);
 378
 379         NCSI_FOR_EACH_PACKAGE(ndp, np) {
 380                 spin_lock_irqsave(&np->lock, flags);
 381                 np->multi_channel = false;
 382                 np->channel_whitelist = UINT_MAX;
 383                 np->preferred_channel = NULL;
 384                 spin_unlock_irqrestore(&np->lock, flags);
 385         }
 386         netdev_info(ndp->ndev.dev, "NCSI: Cleared preferred package/channel\n");
 387
 388         /* Update channel configuration */
 389         if (!(ndp->flags & NCSI_DEV_RESET))
 390                 ncsi_reset_dev(&ndp->ndev);
 391
 392         return 0;
 393 }
 394
 395 static int ncsi_send_cmd_nl(struct sk_buff *msg, struct genl_info *info)
 396 {
 397         struct ncsi_dev_priv *ndp;
 398         struct ncsi_pkt_hdr *hdr;
 399         struct ncsi_cmd_arg nca;
 400         unsigned char *data;
 401         u32 package_id;
 402         u32 channel_id;
 403         int len, ret;
 404
 405         if (!info || !info->attrs) {
 406                 ret = -EINVAL;
 407                 goto out;
 408         }
 409
 410         if (!info->attrs[NCSI_ATTR_IFINDEX]) {
 411                 ret = -EINVAL;
 412                 goto out;
 413         }
 414
 415         if (!info->attrs[NCSI_ATTR_PACKAGE_ID]) {
 416                 ret = -EINVAL;
 417                 goto out;
 418         }
 419
 420         if (!info->attrs[NCSI_ATTR_CHANNEL_ID]) {
 421                 ret = -EINVAL;
 422                 goto out;
 423         }
 424
 425         if (!info->attrs[NCSI_ATTR_DATA]) {
 426                 ret = -EINVAL;
 427                 goto out;
 428         }
 429
 430         ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
 431                                nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
 432         if (!ndp) {
 433                 ret = -ENODEV;
 434                 goto out;
 435         }
 436
 437         package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
 438         channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
 439
 440         if (package_id >= NCSI_MAX_PACKAGE || channel_id >= NCSI_MAX_CHANNEL) {
 441                 ret = -ERANGE;
 442                 goto out_netlink;
 443         }
 444
 445         len = nla_len(info->attrs[NCSI_ATTR_DATA]);
 446         if (len < sizeof(struct ncsi_pkt_hdr)) {
 447                 netdev_info(ndp->ndev.dev, "NCSI: no command to send %u\n",
 448                             package_id);
 449                 ret = -EINVAL;
 450                 goto out_netlink;
 451         } else {
 452                 data = (unsigned char *)nla_data(info->attrs[NCSI_ATTR_DATA]);
 453         }
 454
 455         hdr = (struct ncsi_pkt_hdr *)data;
 456
 457         nca.ndp = ndp;
 458         nca.package = (unsigned char)package_id;
 459         nca.channel = (unsigned char)channel_id;
 460         nca.type = hdr->type;
 461         nca.req_flags = NCSI_REQ_FLAG_NETLINK_DRIVEN;
 462         nca.info = info;
 463         nca.payload = ntohs(hdr->length);
 464         nca.data = data + sizeof(*hdr);
 465
 466         ret = ncsi_xmit_cmd(&nca);
 467 out_netlink:
 468         if (ret != 0) {
 469                 netdev_err(ndp->ndev.dev,
 470                            "NCSI: Error %d sending command\n",
 471                            ret);
 472                 ncsi_send_netlink_err(ndp->ndev.dev,
 473                                       info->snd_seq,
 474                                       info->snd_portid,
 475                                       info->nlhdr,
 476                                       ret);
 477         }
 478 out:
 479         return ret;
 480 }
 481
 482 int ncsi_send_netlink_rsp(struct ncsi_request *nr,
 483                           struct ncsi_package *np,
 484                           struct ncsi_channel *nc)
 485 {
 486         struct sk_buff *skb;
 487         struct net *net;
 488         void *hdr;
 489         int rc;
 490
 491         net = dev_net(nr->rsp->dev);
 492
 493         skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 494         if (!skb)
 495                 return -ENOMEM;
 496
 497         hdr = genlmsg_put(skb, nr->snd_portid, nr->snd_seq,
 498                           &ncsi_genl_family, 0, NCSI_CMD_SEND_CMD);
 499         if (!hdr) {
 500                 kfree_skb(skb);
 501                 return -EMSGSIZE;
 502         }
 503
 504         nla_put_u32(skb, NCSI_ATTR_IFINDEX, nr->rsp->dev->ifindex);
 505         if (np)
 506                 nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID, np->id);
 507         if (nc)
 508                 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, nc->id);
 509         else
 510                 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, NCSI_RESERVED_CHANNEL);
 511
 512         rc = nla_put(skb, NCSI_ATTR_DATA, nr->rsp->len, (void *)nr->rsp->data);
 513         if (rc)
 514                 goto err;
 515
 516         genlmsg_end(skb, hdr);
 517         return genlmsg_unicast(net, skb, nr->snd_portid);
 518
 519 err:
 520         kfree_skb(skb);
 521         return rc;
 522 }
 523
 524 int ncsi_send_netlink_timeout(struct ncsi_request *nr,
 525                               struct ncsi_package *np,
 526                               struct ncsi_channel *nc)
 527 {
 528         struct sk_buff *skb;
 529         struct net *net;
 530         void *hdr;
 531
 532         skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 533         if (!skb)
 534                 return -ENOMEM;
 535
 536         hdr = genlmsg_put(skb, nr->snd_portid, nr->snd_seq,
 537                           &ncsi_genl_family, 0, NCSI_CMD_SEND_CMD);
 538         if (!hdr) {
 539                 kfree_skb(skb);
 540                 return -EMSGSIZE;
 541         }
 542
 543         net = dev_net(nr->cmd->dev);
 544
 545         nla_put_u32(skb, NCSI_ATTR_IFINDEX, nr->cmd->dev->ifindex);
 546
 547         if (np)
 548                 nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID, np->id);
 549         else
 550                 nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID,
 551                             NCSI_PACKAGE_INDEX((((struct ncsi_pkt_hdr *)
 552                                                  nr->cmd->data)->channel)));
 553
 554         if (nc)
 555                 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, nc->id);
 556         else
 557                 nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, NCSI_RESERVED_CHANNEL);
 558
 559         genlmsg_end(skb, hdr);
 560         return genlmsg_unicast(net, skb, nr->snd_portid);
 561 }
 562
 563 int ncsi_send_netlink_err(struct net_device *dev,
 564                           u32 snd_seq,
 565                           u32 snd_portid,
 566                           const struct nlmsghdr *nlhdr,
 567                           int err)
 568 {
 569         struct nlmsghdr *nlh;
 570         struct nlmsgerr *nle;
 571         struct sk_buff *skb;
 572         struct net *net;
 573
 574         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 575         if (!skb)
 576                 return -ENOMEM;
 577
 578         net = dev_net(dev);
 579
 580         nlh = nlmsg_put(skb, snd_portid, snd_seq,
 581                         NLMSG_ERROR, sizeof(*nle), 0);
 582         nle = (struct nlmsgerr *)nlmsg_data(nlh);
 583         nle->error = err;
 584         memcpy(&nle->msg, nlhdr, sizeof(*nlh));
 585
 586         nlmsg_end(skb, nlh);
 587
 588         return nlmsg_unicast(net->genl_sock, skb, snd_portid);
 589 }
 590
 591 static int ncsi_set_package_mask_nl(struct sk_buff *msg,
 592                                     struct genl_info *info)
 593 {
 594         struct ncsi_dev_priv *ndp;
 595         unsigned long flags;
 596         int rc;
 597
 598         if (!info || !info->attrs)
 599                 return -EINVAL;
 600
 601         if (!info->attrs[NCSI_ATTR_IFINDEX])
 602                 return -EINVAL;
 603
 604         if (!info->attrs[NCSI_ATTR_PACKAGE_MASK])
 605                 return -EINVAL;
 606
 607         ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
 608                                nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
 609         if (!ndp)
 610                 return -ENODEV;
 611
 612         spin_lock_irqsave(&ndp->lock, flags);
 613         if (nla_get_flag(info->attrs[NCSI_ATTR_MULTI_FLAG])) {
 614                 if (ndp->flags & NCSI_DEV_HWA) {
 615                         ndp->multi_package = true;
 616                         rc = 0;
 617                 } else {
 618                         netdev_err(ndp->ndev.dev,
 619                                    "NCSI: Can't use multiple packages without HWA\n");
 620                         rc = -EPERM;
 621                 }
 622         } else {
 623                 ndp->multi_package = false;
 624                 rc = 0;
 625         }
 626
 627         if (!rc)
 628                 ndp->package_whitelist =
 629                         nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_MASK]);
 630         spin_unlock_irqrestore(&ndp->lock, flags);
 631
 632         if (!rc) {
 633                 /* Update channel configuration */
 634                 if (!(ndp->flags & NCSI_DEV_RESET))
 635                         ncsi_reset_dev(&ndp->ndev);
 636         }
 637
 638         return rc;
 639 }
 640
 641 static int ncsi_set_channel_mask_nl(struct sk_buff *msg,
 642                                     struct genl_info *info)
 643 {
 644         struct ncsi_package *np, *package;
 645         struct ncsi_channel *nc, *channel;
 646         u32 package_id, channel_id;
 647         struct ncsi_dev_priv *ndp;
 648         unsigned long flags;
 649
 650         if (!info || !info->attrs)
 651                 return -EINVAL;
 652
 653         if (!info->attrs[NCSI_ATTR_IFINDEX])
 654                 return -EINVAL;
 655
 656         if (!info->attrs[NCSI_ATTR_PACKAGE_ID])
 657                 return -EINVAL;
 658
 659         if (!info->attrs[NCSI_ATTR_CHANNEL_MASK])
 660                 return -EINVAL;
 661
 662         ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
 663                                nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
 664         if (!ndp)
 665                 return -ENODEV;
 666
 667         package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
 668         package = NULL;
 669         NCSI_FOR_EACH_PACKAGE(ndp, np)
 670                 if (np->id == package_id) {
 671                         package = np;
 672                         break;
 673                 }
 674         if (!package)
 675                 return -ERANGE;
 676
 677         spin_lock_irqsave(&package->lock, flags);
 678
 679         channel = NULL;
 680         if (info->attrs[NCSI_ATTR_CHANNEL_ID]) {
 681                 channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
 682                 NCSI_FOR_EACH_CHANNEL(np, nc)
 683                         if (nc->id == channel_id) {
 684                                 channel = nc;
 685                                 break;
 686                         }
 687                 if (!channel) {
 688                         spin_unlock_irqrestore(&package->lock, flags);
 689                         return -ERANGE;
 690                 }
 691                 netdev_dbg(ndp->ndev.dev,
 692                            "NCSI: Channel %u set as preferred channel\n",
 693                            channel->id);
 694         }
 695
 696         package->channel_whitelist =
 697                 nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_MASK]);
 698         if (package->channel_whitelist == 0)
 699                 netdev_dbg(ndp->ndev.dev,
 700                            "NCSI: Package %u set to all channels disabled\n",
 701                            package->id);
 702
 703         package->preferred_channel = channel;
 704
 705         if (nla_get_flag(info->attrs[NCSI_ATTR_MULTI_FLAG])) {
 706                 package->multi_channel = true;
 707                 netdev_info(ndp->ndev.dev,
 708                             "NCSI: Multi-channel enabled on package %u\n",
 709                             package_id);
 710         } else {
 711                 package->multi_channel = false;
 712         }
 713
 714         spin_unlock_irqrestore(&package->lock, flags);
 715
 716         /* Update channel configuration */
 717         if (!(ndp->flags & NCSI_DEV_RESET))
 718                 ncsi_reset_dev(&ndp->ndev);
 719
 720         return 0;
 721 }
 722
 723 static const struct genl_small_ops ncsi_ops[] = {
 724         {
 725                 .cmd = NCSI_CMD_PKG_INFO,
 726                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 727                 .doit = ncsi_pkg_info_nl,
 728                 .dumpit = ncsi_pkg_info_all_nl,
 729                 .flags = 0,
 730         },
 731         {
 732                 .cmd = NCSI_CMD_SET_INTERFACE,
 733                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 734                 .doit = ncsi_set_interface_nl,
 735                 .flags = GENL_ADMIN_PERM,
 736         },
 737         {
 738                 .cmd = NCSI_CMD_CLEAR_INTERFACE,
 739                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 740                 .doit = ncsi_clear_interface_nl,
 741                 .flags = GENL_ADMIN_PERM,
 742         },
 743         {
 744                 .cmd = NCSI_CMD_SEND_CMD,
 745                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 746                 .doit = ncsi_send_cmd_nl,
 747                 .flags = GENL_ADMIN_PERM,
 748         },
 749         {
 750                 .cmd = NCSI_CMD_SET_PACKAGE_MASK,
 751                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 752                 .doit = ncsi_set_package_mask_nl,
 753                 .flags = GENL_ADMIN_PERM,
 754         },
 755         {
 756                 .cmd = NCSI_CMD_SET_CHANNEL_MASK,
 757                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 758                 .doit = ncsi_set_channel_mask_nl,
 759                 .flags = GENL_ADMIN_PERM,
 760         },
 761 };
 762
 763 static struct genl_family ncsi_genl_family __ro_after_init = {
 764         .name = "NCSI",
 765         .version = 0,
 766         .maxattr = NCSI_ATTR_MAX,
 767         .policy = ncsi_genl_policy,
 768         .module = THIS_MODULE,
 769         .small_ops = ncsi_ops,
 770         .n_small_ops = ARRAY_SIZE(ncsi_ops),
 771         .resv_start_op = NCSI_CMD_SET_CHANNEL_MASK + 1,
 772 };
 773
 774 static int __init ncsi_init_netlink(void)
 775 {
 776         return genl_register_family(&ncsi_genl_family);
 777 }
 778 subsys_initcall(ncsi_init_netlink);