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   1 /*
   2  * Copyright (c) 2008, Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  15  * Place - Suite 330, Boston, MA 02111-1307 USA.
  16  *
  17  * Author: Lucy Liu <lucy.liu@intel.com>
  18  */
  19
  20 #include <linux/netdevice.h>
  21 #include <linux/netlink.h>
  22 #include <net/netlink.h>
  23 #include <net/rtnetlink.h>
  24 #include <linux/dcbnl.h>
  25 #include <linux/rtnetlink.h>
  26 #include <net/sock.h>
  27
  28 /**
  29  * Data Center Bridging (DCB) is a collection of Ethernet enhancements
  30  * intended to allow network traffic with differing requirements
  31  * (highly reliable, no drops vs. best effort vs. low latency) to operate
  32  * and co-exist on Ethernet.  Current DCB features are:
  33  *
  34  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
  35  *   framework for assigning bandwidth guarantees to traffic classes.
  36  *
  37  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
  38  *   can work independently for each 802.1p priority.
  39  *
  40  * Congestion Notification - provides a mechanism for end-to-end congestion
  41  *   control for protocols which do not have built-in congestion management.
  42  *
  43  * More information about the emerging standards for these Ethernet features
  44  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
  45  *
  46  * This file implements an rtnetlink interface to allow configuration of DCB
  47  * features for capable devices.
  48  */
  49
  50 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
  51 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
  52 MODULE_LICENSE("GPL");
  53
  54 /**************** DCB attribute policies *************************************/
  55
  56 /* DCB netlink attributes policy */
  57 static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
  58         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  59         [DCB_ATTR_STATE]       = {.type = NLA_U8},
  60         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  61         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  62         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
  63         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
  64         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  65         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  66         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
  67 };
  68
  69 /* DCB priority flow control to User Priority nested attributes */
  70 static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
  71         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  72         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  73         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  74         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  75         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  76         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  77         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  78         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  79         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  80 };
  81
  82 /* DCB priority grouping nested attributes */
  83 static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
  84         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  85         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  86         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  87         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  88         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  89         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  90         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  91         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  92         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  93         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
  94         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
  95         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
  96         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
  97         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
  98         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
  99         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
 100         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
 101         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
 102 };
 103
 104 /* DCB traffic class nested attributes. */
 105 static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
 106         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
 107         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
 108         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
 109         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
 110         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
 111 };
 112
 113 /* DCB capabilities nested attributes. */
 114 static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
 115         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
 116         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
 117         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
 118         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
 119         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
 120         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
 121         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
 122         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
 123 };
 124
 125 /* DCB capabilities nested attributes. */
 126 static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
 127         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
 128         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
 129         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
 130 };
 131
 132 /* DCB BCN nested attributes. */
 133 static struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
 134         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
 135         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
 136         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
 137         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
 138         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
 139         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
 140         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
 141         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
 142         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
 143         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
 144         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
 145         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
 146         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
 147         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
 148         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
 149         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
 150         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
 151         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
 152         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
 153         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
 154         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
 155         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
 156         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
 157 };
 158
 159 /* standard netlink reply call */
 160 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
 161                        u32 seq, u16 flags)
 162 {
 163         struct sk_buff *dcbnl_skb;
 164         struct dcbmsg *dcb;
 165         struct nlmsghdr *nlh;
 166         int ret = -EINVAL;
 167
 168         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 169         if (!dcbnl_skb)
 170                 return ret;
 171
 172         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
 173
 174         dcb = NLMSG_DATA(nlh);
 175         dcb->dcb_family = AF_UNSPEC;
 176         dcb->cmd = cmd;
 177         dcb->dcb_pad = 0;
 178
 179         ret = nla_put_u8(dcbnl_skb, attr, value);
 180         if (ret)
 181                 goto err;
 182
 183         /* end the message, assign the nlmsg_len. */
 184         nlmsg_end(dcbnl_skb, nlh);
 185         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 186         if (ret)
 187                 goto err;
 188
 189         return 0;
 190 nlmsg_failure:
 191 err:
 192         kfree(dcbnl_skb);
 193         return ret;
 194 }
 195
 196 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
 197                           u32 pid, u32 seq, u16 flags)
 198 {
 199         int ret = -EINVAL;
 200
 201         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
 202         if (!netdev->dcbnl_ops->getstate)
 203                 return ret;
 204
 205         ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
 206                           DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
 207
 208         return ret;
 209 }
 210
 211 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
 212                            u32 pid, u32 seq, u16 flags)
 213 {
 214         struct sk_buff *dcbnl_skb;
 215         struct nlmsghdr *nlh;
 216         struct dcbmsg *dcb;
 217         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
 218         u8 value;
 219         int ret = -EINVAL;
 220         int i;
 221         int getall = 0;
 222
 223         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
 224                 return ret;
 225
 226         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 227                                tb[DCB_ATTR_PFC_CFG],
 228                                dcbnl_pfc_up_nest);
 229         if (ret)
 230                 goto err_out;
 231
 232         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 233         if (!dcbnl_skb)
 234                 goto err_out;
 235
 236         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 237
 238         dcb = NLMSG_DATA(nlh);
 239         dcb->dcb_family = AF_UNSPEC;
 240         dcb->cmd = DCB_CMD_PFC_GCFG;
 241
 242         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
 243         if (!nest)
 244                 goto err;
 245
 246         if (data[DCB_PFC_UP_ATTR_ALL])
 247                 getall = 1;
 248
 249         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 250                 if (!getall && !data[i])
 251                         continue;
 252
 253                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
 254                                              &value);
 255                 ret = nla_put_u8(dcbnl_skb, i, value);
 256
 257                 if (ret) {
 258                         nla_nest_cancel(dcbnl_skb, nest);
 259                         goto err;
 260                 }
 261         }
 262         nla_nest_end(dcbnl_skb, nest);
 263
 264         nlmsg_end(dcbnl_skb, nlh);
 265
 266         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 267         if (ret)
 268                 goto err;
 269
 270         return 0;
 271 nlmsg_failure:
 272 err:
 273         kfree(dcbnl_skb);
 274 err_out:
 275         return -EINVAL;
 276 }
 277
 278 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
 279                                 u32 pid, u32 seq, u16 flags)
 280 {
 281         struct sk_buff *dcbnl_skb;
 282         struct nlmsghdr *nlh;
 283         struct dcbmsg *dcb;
 284         u8 perm_addr[MAX_ADDR_LEN];
 285         int ret = -EINVAL;
 286
 287         if (!netdev->dcbnl_ops->getpermhwaddr)
 288                 return ret;
 289
 290         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 291         if (!dcbnl_skb)
 292                 goto err_out;
 293
 294         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 295
 296         dcb = NLMSG_DATA(nlh);
 297         dcb->dcb_family = AF_UNSPEC;
 298         dcb->cmd = DCB_CMD_GPERM_HWADDR;
 299
 300         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
 301
 302         ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
 303                       perm_addr);
 304
 305         nlmsg_end(dcbnl_skb, nlh);
 306
 307         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 308         if (ret)
 309                 goto err;
 310
 311         return 0;
 312
 313 nlmsg_failure:
 314 err:
 315         kfree(dcbnl_skb);
 316 err_out:
 317         return -EINVAL;
 318 }
 319
 320 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
 321                         u32 pid, u32 seq, u16 flags)
 322 {
 323         struct sk_buff *dcbnl_skb;
 324         struct nlmsghdr *nlh;
 325         struct dcbmsg *dcb;
 326         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
 327         u8 value;
 328         int ret = -EINVAL;
 329         int i;
 330         int getall = 0;
 331
 332         if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
 333                 return ret;
 334
 335         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
 336                                dcbnl_cap_nest);
 337         if (ret)
 338                 goto err_out;
 339
 340         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 341         if (!dcbnl_skb)
 342                 goto err_out;
 343
 344         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 345
 346         dcb = NLMSG_DATA(nlh);
 347         dcb->dcb_family = AF_UNSPEC;
 348         dcb->cmd = DCB_CMD_GCAP;
 349
 350         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
 351         if (!nest)
 352                 goto err;
 353
 354         if (data[DCB_CAP_ATTR_ALL])
 355                 getall = 1;
 356
 357         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
 358                 if (!getall && !data[i])
 359                         continue;
 360
 361                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
 362                         ret = nla_put_u8(dcbnl_skb, i, value);
 363
 364                         if (ret) {
 365                                 nla_nest_cancel(dcbnl_skb, nest);
 366                                 goto err;
 367                         }
 368                 }
 369         }
 370         nla_nest_end(dcbnl_skb, nest);
 371
 372         nlmsg_end(dcbnl_skb, nlh);
 373
 374         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 375         if (ret)
 376                 goto err;
 377
 378         return 0;
 379 nlmsg_failure:
 380 err:
 381         kfree(dcbnl_skb);
 382 err_out:
 383         return -EINVAL;
 384 }
 385
 386 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
 387                            u32 pid, u32 seq, u16 flags)
 388 {
 389         struct sk_buff *dcbnl_skb;
 390         struct nlmsghdr *nlh;
 391         struct dcbmsg *dcb;
 392         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
 393         u8 value;
 394         int ret = -EINVAL;
 395         int i;
 396         int getall = 0;
 397
 398         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
 399                 return ret;
 400
 401         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 402                                dcbnl_numtcs_nest);
 403         if (ret) {
 404                 ret = -EINVAL;
 405                 goto err_out;
 406         }
 407
 408         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 409         if (!dcbnl_skb) {
 410                 ret = -EINVAL;
 411                 goto err_out;
 412         }
 413
 414         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 415
 416         dcb = NLMSG_DATA(nlh);
 417         dcb->dcb_family = AF_UNSPEC;
 418         dcb->cmd = DCB_CMD_GNUMTCS;
 419
 420         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
 421         if (!nest) {
 422                 ret = -EINVAL;
 423                 goto err;
 424         }
 425
 426         if (data[DCB_NUMTCS_ATTR_ALL])
 427                 getall = 1;
 428
 429         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 430                 if (!getall && !data[i])
 431                         continue;
 432
 433                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
 434                 if (!ret) {
 435                         ret = nla_put_u8(dcbnl_skb, i, value);
 436
 437                         if (ret) {
 438                                 nla_nest_cancel(dcbnl_skb, nest);
 439                                 ret = -EINVAL;
 440                                 goto err;
 441                         }
 442                 } else {
 443                         goto err;
 444                 }
 445         }
 446         nla_nest_end(dcbnl_skb, nest);
 447
 448         nlmsg_end(dcbnl_skb, nlh);
 449
 450         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 451         if (ret) {
 452                 ret = -EINVAL;
 453                 goto err;
 454         }
 455
 456         return 0;
 457 nlmsg_failure:
 458 err:
 459         kfree(dcbnl_skb);
 460 err_out:
 461         return ret;
 462 }
 463
 464 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
 465                            u32 pid, u32 seq, u16 flags)
 466 {
 467         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
 468         int ret = -EINVAL;
 469         u8 value;
 470         int i;
 471
 472         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
 473                 return ret;
 474
 475         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 476                                dcbnl_numtcs_nest);
 477
 478         if (ret) {
 479                 ret = -EINVAL;
 480                 goto err;
 481         }
 482
 483         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 484                 if (data[i] == NULL)
 485                         continue;
 486
 487                 value = nla_get_u8(data[i]);
 488
 489                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
 490
 491                 if (ret)
 492                         goto operr;
 493         }
 494
 495 operr:
 496         ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
 497                           DCB_ATTR_NUMTCS, pid, seq, flags);
 498
 499 err:
 500         return ret;
 501 }
 502
 503 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
 504                              u32 pid, u32 seq, u16 flags)
 505 {
 506         int ret = -EINVAL;
 507
 508         if (!netdev->dcbnl_ops->getpfcstate)
 509                 return ret;
 510
 511         ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
 512                           DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
 513                           pid, seq, flags);
 514
 515         return ret;
 516 }
 517
 518 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
 519                              u32 pid, u32 seq, u16 flags)
 520 {
 521         int ret = -EINVAL;
 522         u8 value;
 523
 524         if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
 525                 return ret;
 526
 527         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
 528
 529         netdev->dcbnl_ops->setpfcstate(netdev, value);
 530
 531         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
 532                           pid, seq, flags);
 533
 534         return ret;
 535 }
 536
 537 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
 538                              u32 pid, u32 seq, u16 flags, int dir)
 539 {
 540         struct sk_buff *dcbnl_skb;
 541         struct nlmsghdr *nlh;
 542         struct dcbmsg *dcb;
 543         struct nlattr *pg_nest, *param_nest, *data;
 544         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 545         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 546         u8 prio, pgid, tc_pct, up_map;
 547         int ret  = -EINVAL;
 548         int getall = 0;
 549         int i;
 550
 551         if (!tb[DCB_ATTR_PG_CFG] ||
 552             !netdev->dcbnl_ops->getpgtccfgtx ||
 553             !netdev->dcbnl_ops->getpgtccfgrx ||
 554             !netdev->dcbnl_ops->getpgbwgcfgtx ||
 555             !netdev->dcbnl_ops->getpgbwgcfgrx)
 556                 return ret;
 557
 558         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
 559                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
 560
 561         if (ret)
 562                 goto err_out;
 563
 564         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 565         if (!dcbnl_skb)
 566                 goto err_out;
 567
 568         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 569
 570         dcb = NLMSG_DATA(nlh);
 571         dcb->dcb_family = AF_UNSPEC;
 572         dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
 573
 574         pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
 575         if (!pg_nest)
 576                 goto err;
 577
 578         if (pg_tb[DCB_PG_ATTR_TC_ALL])
 579                 getall = 1;
 580
 581         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 582                 if (!getall && !pg_tb[i])
 583                         continue;
 584
 585                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
 586                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
 587                 else
 588                         data = pg_tb[i];
 589                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 590                                        data, dcbnl_tc_param_nest);
 591                 if (ret)
 592                         goto err_pg;
 593
 594                 param_nest = nla_nest_start(dcbnl_skb, i);
 595                 if (!param_nest)
 596                         goto err_pg;
 597
 598                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 599                 prio = DCB_ATTR_VALUE_UNDEFINED;
 600                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 601                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 602
 603                 if (dir) {
 604                         /* Rx */
 605                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
 606                                                 i - DCB_PG_ATTR_TC_0, &prio,
 607                                                 &pgid, &tc_pct, &up_map);
 608                 } else {
 609                         /* Tx */
 610                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
 611                                                 i - DCB_PG_ATTR_TC_0, &prio,
 612                                                 &pgid, &tc_pct, &up_map);
 613                 }
 614
 615                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
 616                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 617                         ret = nla_put_u8(dcbnl_skb,
 618                                          DCB_TC_ATTR_PARAM_PGID, pgid);
 619                         if (ret)
 620                                 goto err_param;
 621                 }
 622                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
 623                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 624                         ret = nla_put_u8(dcbnl_skb,
 625                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
 626                         if (ret)
 627                                 goto err_param;
 628                 }
 629                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
 630                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 631                         ret = nla_put_u8(dcbnl_skb,
 632                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
 633                         if (ret)
 634                                 goto err_param;
 635                 }
 636                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
 637                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 638                         ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
 639                                          tc_pct);
 640                         if (ret)
 641                                 goto err_param;
 642                 }
 643                 nla_nest_end(dcbnl_skb, param_nest);
 644         }
 645
 646         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
 647                 getall = 1;
 648         else
 649                 getall = 0;
 650
 651         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 652                 if (!getall && !pg_tb[i])
 653                         continue;
 654
 655                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 656
 657                 if (dir) {
 658                         /* Rx */
 659                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
 660                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 661                 } else {
 662                         /* Tx */
 663                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
 664                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 665                 }
 666                 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
 667
 668                 if (ret)
 669                         goto err_pg;
 670         }
 671
 672         nla_nest_end(dcbnl_skb, pg_nest);
 673
 674         nlmsg_end(dcbnl_skb, nlh);
 675
 676         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 677         if (ret)
 678                 goto err;
 679
 680         return 0;
 681
 682 err_param:
 683         nla_nest_cancel(dcbnl_skb, param_nest);
 684 err_pg:
 685         nla_nest_cancel(dcbnl_skb, pg_nest);
 686 nlmsg_failure:
 687 err:
 688         kfree(dcbnl_skb);
 689 err_out:
 690         ret  = -EINVAL;
 691         return ret;
 692 }
 693
 694 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
 695                              u32 pid, u32 seq, u16 flags)
 696 {
 697         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
 698 }
 699
 700 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
 701                              u32 pid, u32 seq, u16 flags)
 702 {
 703         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
 704 }
 705
 706 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
 707                           u32 pid, u32 seq, u16 flags)
 708 {
 709         int ret = -EINVAL;
 710         u8 value;
 711
 712         if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
 713                 return ret;
 714
 715         value = nla_get_u8(tb[DCB_ATTR_STATE]);
 716
 717         ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
 718                           RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
 719                           pid, seq, flags);
 720
 721         return ret;
 722 }
 723
 724 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
 725                            u32 pid, u32 seq, u16 flags)
 726 {
 727         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
 728         int i;
 729         int ret = -EINVAL;
 730         u8 value;
 731
 732         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
 733                 return ret;
 734
 735         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 736                                tb[DCB_ATTR_PFC_CFG],
 737                                dcbnl_pfc_up_nest);
 738         if (ret)
 739                 goto err;
 740
 741         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 742                 if (data[i] == NULL)
 743                         continue;
 744                 value = nla_get_u8(data[i]);
 745                 netdev->dcbnl_ops->setpfccfg(netdev,
 746                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
 747         }
 748
 749         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
 750                           pid, seq, flags);
 751 err:
 752         return ret;
 753 }
 754
 755 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
 756                         u32 pid, u32 seq, u16 flags)
 757 {
 758         int ret = -EINVAL;
 759
 760         if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
 761                 return ret;
 762
 763         ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
 764                           DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
 765
 766         return ret;
 767 }
 768
 769 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
 770                              u32 pid, u32 seq, u16 flags, int dir)
 771 {
 772         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 773         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 774         int ret = -EINVAL;
 775         int i;
 776         u8 pgid;
 777         u8 up_map;
 778         u8 prio;
 779         u8 tc_pct;
 780
 781         if (!tb[DCB_ATTR_PG_CFG] ||
 782             !netdev->dcbnl_ops->setpgtccfgtx ||
 783             !netdev->dcbnl_ops->setpgtccfgrx ||
 784             !netdev->dcbnl_ops->setpgbwgcfgtx ||
 785             !netdev->dcbnl_ops->setpgbwgcfgrx)
 786                 return ret;
 787
 788         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
 789                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
 790         if (ret)
 791                 goto err;
 792
 793         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 794                 if (!pg_tb[i])
 795                         continue;
 796
 797                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 798                                        pg_tb[i], dcbnl_tc_param_nest);
 799                 if (ret)
 800                         goto err;
 801
 802                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 803                 prio = DCB_ATTR_VALUE_UNDEFINED;
 804                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 805                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 806
 807                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
 808                         prio =
 809                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
 810
 811                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
 812                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
 813
 814                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
 815                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
 816
 817                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
 818                         up_map =
 819                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
 820
 821                 /* dir: Tx = 0, Rx = 1 */
 822                 if (dir) {
 823                         /* Rx */
 824                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
 825                                 i - DCB_PG_ATTR_TC_0,
 826                                 prio, pgid, tc_pct, up_map);
 827                 } else {
 828                         /* Tx */
 829                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
 830                                 i - DCB_PG_ATTR_TC_0,
 831                                 prio, pgid, tc_pct, up_map);
 832                 }
 833         }
 834
 835         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 836                 if (!pg_tb[i])
 837                         continue;
 838
 839                 tc_pct = nla_get_u8(pg_tb[i]);
 840
 841                 /* dir: Tx = 0, Rx = 1 */
 842                 if (dir) {
 843                         /* Rx */
 844                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
 845                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 846                 } else {
 847                         /* Tx */
 848                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
 849                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 850                 }
 851         }
 852
 853         ret = dcbnl_reply(0, RTM_SETDCB,
 854                           (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
 855                           DCB_ATTR_PG_CFG, pid, seq, flags);
 856
 857 err:
 858         return ret;
 859 }
 860
 861 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
 862                              u32 pid, u32 seq, u16 flags)
 863 {
 864         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
 865 }
 866
 867 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
 868                              u32 pid, u32 seq, u16 flags)
 869 {
 870         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
 871 }
 872
 873 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
 874                             u32 pid, u32 seq, u16 flags)
 875 {
 876         struct sk_buff *dcbnl_skb;
 877         struct nlmsghdr *nlh;
 878         struct dcbmsg *dcb;
 879         struct nlattr *bcn_nest;
 880         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
 881         u8 value_byte;
 882         u32 value_integer;
 883         int ret  = -EINVAL;
 884         bool getall = false;
 885         int i;
 886
 887         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
 888             !netdev->dcbnl_ops->getbcncfg)
 889                 return ret;
 890
 891         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
 892                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
 893
 894         if (ret)
 895                 goto err_out;
 896
 897         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 898         if (!dcbnl_skb)
 899                 goto err_out;
 900
 901         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 902
 903         dcb = NLMSG_DATA(nlh);
 904         dcb->dcb_family = AF_UNSPEC;
 905         dcb->cmd = DCB_CMD_BCN_GCFG;
 906
 907         bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
 908         if (!bcn_nest)
 909                 goto err;
 910
 911         if (bcn_tb[DCB_BCN_ATTR_ALL])
 912                 getall = true;
 913
 914         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 915                 if (!getall && !bcn_tb[i])
 916                         continue;
 917
 918                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
 919                                             &value_byte);
 920                 ret = nla_put_u8(dcbnl_skb, i, value_byte);
 921                 if (ret)
 922                         goto err_bcn;
 923         }
 924
 925         for (i = DCB_BCN_ATTR_ALPHA; i <= DCB_BCN_ATTR_RI; i++) {
 926                 if (!getall && !bcn_tb[i])
 927                         continue;
 928
 929                 netdev->dcbnl_ops->getbcncfg(netdev, i,
 930                                              &value_integer);
 931                 ret = nla_put_u32(dcbnl_skb, i, value_integer);
 932                 if (ret)
 933                         goto err_bcn;
 934         }
 935
 936         nla_nest_end(dcbnl_skb, bcn_nest);
 937
 938         nlmsg_end(dcbnl_skb, nlh);
 939
 940         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 941         if (ret)
 942                 goto err;
 943
 944         return 0;
 945
 946 err_bcn:
 947         nla_nest_cancel(dcbnl_skb, bcn_nest);
 948 nlmsg_failure:
 949 err:
 950         kfree(dcbnl_skb);
 951 err_out:
 952         ret  = -EINVAL;
 953         return ret;
 954 }
 955
 956 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
 957                             u32 pid, u32 seq, u16 flags)
 958 {
 959         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
 960         int i;
 961         int ret = -EINVAL;
 962         u8 value_byte;
 963         u32 value_int;
 964
 965         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg
 966             || !netdev->dcbnl_ops->setbcnrp)
 967                 return ret;
 968
 969         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
 970                                tb[DCB_ATTR_BCN],
 971                                dcbnl_pfc_up_nest);
 972         if (ret)
 973                 goto err;
 974
 975         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 976                 if (data[i] == NULL)
 977                         continue;
 978                 value_byte = nla_get_u8(data[i]);
 979                 netdev->dcbnl_ops->setbcnrp(netdev,
 980                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
 981         }
 982
 983         for (i = DCB_BCN_ATTR_ALPHA; i <= DCB_BCN_ATTR_RI; i++) {
 984                 if (data[i] == NULL)
 985                         continue;
 986                 value_int = nla_get_u32(data[i]);
 987                 netdev->dcbnl_ops->setbcncfg(netdev,
 988                                              i, value_int);
 989         }
 990
 991         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
 992                           pid, seq, flags);
 993 err:
 994         return ret;
 995 }
 996
 997 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 998 {
 999         struct net *net = sock_net(skb->sk);
1000         struct net_device *netdev;
1001         struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1002         struct nlattr *tb[DCB_ATTR_MAX + 1];
1003         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1004         int ret = -EINVAL;
1005
1006         if (net != &init_net)
1007                 return -EINVAL;
1008
1009         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1010                           dcbnl_rtnl_policy);
1011         if (ret < 0)
1012                 return ret;
1013
1014         if (!tb[DCB_ATTR_IFNAME])
1015                 return -EINVAL;
1016
1017         netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1018         if (!netdev)
1019                 return -EINVAL;
1020
1021         if (!netdev->dcbnl_ops)
1022                 goto errout;
1023
1024         switch (dcb->cmd) {
1025         case DCB_CMD_GSTATE:
1026                 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1027                                      nlh->nlmsg_flags);
1028                 goto out;
1029         case DCB_CMD_PFC_GCFG:
1030                 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1031                                       nlh->nlmsg_flags);
1032                 goto out;
1033         case DCB_CMD_GPERM_HWADDR:
1034                 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1035                                            nlh->nlmsg_flags);
1036                 goto out;
1037         case DCB_CMD_PGTX_GCFG:
1038                 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1039                                         nlh->nlmsg_flags);
1040                 goto out;
1041         case DCB_CMD_PGRX_GCFG:
1042                 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1043                                         nlh->nlmsg_flags);
1044                 goto out;
1045         case DCB_CMD_BCN_GCFG:
1046                 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1047                                        nlh->nlmsg_flags);
1048                 goto out;
1049         case DCB_CMD_SSTATE:
1050                 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1051                                      nlh->nlmsg_flags);
1052                 goto out;
1053         case DCB_CMD_PFC_SCFG:
1054                 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1055                                       nlh->nlmsg_flags);
1056                 goto out;
1057
1058         case DCB_CMD_SET_ALL:
1059                 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1060                                    nlh->nlmsg_flags);
1061                 goto out;
1062         case DCB_CMD_PGTX_SCFG:
1063                 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1064                                         nlh->nlmsg_flags);
1065                 goto out;
1066         case DCB_CMD_PGRX_SCFG:
1067                 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1068                                         nlh->nlmsg_flags);
1069                 goto out;
1070         case DCB_CMD_GCAP:
1071                 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1072                                    nlh->nlmsg_flags);
1073                 goto out;
1074         case DCB_CMD_GNUMTCS:
1075                 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1076                                       nlh->nlmsg_flags);
1077                 goto out;
1078         case DCB_CMD_SNUMTCS:
1079                 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1080                                       nlh->nlmsg_flags);
1081                 goto out;
1082         case DCB_CMD_PFC_GSTATE:
1083                 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1084                                         nlh->nlmsg_flags);
1085                 goto out;
1086         case DCB_CMD_PFC_SSTATE:
1087                 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1088                                         nlh->nlmsg_flags);
1089                 goto out;
1090         case DCB_CMD_BCN_SCFG:
1091                 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1092                                        nlh->nlmsg_flags);
1093                 goto out;
1094         default:
1095                 goto errout;
1096         }
1097 errout:
1098         ret = -EINVAL;
1099 out:
1100         dev_put(netdev);
1101         return ret;
1102 }
1103
1104 static int __init dcbnl_init(void)
1105 {
1106         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1107         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1108
1109         return 0;
1110 }
1111 module_init(dcbnl_init);
1112
1113 static void __exit dcbnl_exit(void)
1114 {
1115         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1116         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1117 }
1118 module_exit(dcbnl_exit);
1119
1120