net/dcb/dcbnl.c

   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 <linux/slab.h>
  23 #include <net/netlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <linux/dcbnl.h>
  26 #include <net/dcbevent.h>
  27 #include <linux/rtnetlink.h>
  28 #include <net/sock.h>
  29
  30 /**
  31  * Data Center Bridging (DCB) is a collection of Ethernet enhancements
  32  * intended to allow network traffic with differing requirements
  33  * (highly reliable, no drops vs. best effort vs. low latency) to operate
  34  * and co-exist on Ethernet.  Current DCB features are:
  35  *
  36  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
  37  *   framework for assigning bandwidth guarantees to traffic classes.
  38  *
  39  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
  40  *   can work independently for each 802.1p priority.
  41  *
  42  * Congestion Notification - provides a mechanism for end-to-end congestion
  43  *   control for protocols which do not have built-in congestion management.
  44  *
  45  * More information about the emerging standards for these Ethernet features
  46  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
  47  *
  48  * This file implements an rtnetlink interface to allow configuration of DCB
  49  * features for capable devices.
  50  */
  51
  52 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
  53 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
  54 MODULE_LICENSE("GPL");
  55
  56 /**************** DCB attribute policies *************************************/
  57
  58 /* DCB netlink attributes policy */
  59 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
  60         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  61         [DCB_ATTR_STATE]       = {.type = NLA_U8},
  62         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  63         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  64         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
  65         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
  66         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  67         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  68         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
  69         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
  70         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
  71         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
  72         [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
  73 };
  74
  75 /* DCB priority flow control to User Priority nested attributes */
  76 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
  77         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  78         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  79         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  80         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  81         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  82         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  83         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  84         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  85         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  86 };
  87
  88 /* DCB priority grouping nested attributes */
  89 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
  90         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  91         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  92         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  93         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  94         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  95         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  96         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  97         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  98         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  99         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
 100         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
 101         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
 102         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
 103         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
 104         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
 105         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
 106         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
 107         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
 108 };
 109
 110 /* DCB traffic class nested attributes. */
 111 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
 112         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
 113         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
 114         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
 115         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
 116         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
 117 };
 118
 119 /* DCB capabilities nested attributes. */
 120 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
 121         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
 122         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
 123         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
 124         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
 125         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
 126         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
 127         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
 128         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
 129         [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
 130 };
 131
 132 /* DCB capabilities nested attributes. */
 133 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
 134         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
 135         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
 136         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
 137 };
 138
 139 /* DCB BCN nested attributes. */
 140 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
 141         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
 142         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
 143         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
 144         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
 145         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
 146         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
 147         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
 148         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
 149         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
 150         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
 151         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
 152         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
 153         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
 154         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
 155         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
 156         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
 157         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
 158         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
 159         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
 160         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
 161         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
 162         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
 163         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
 164         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
 165         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
 166 };
 167
 168 /* DCB APP nested attributes. */
 169 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
 170         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
 171         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
 172         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
 173 };
 174
 175 /* IEEE 802.1Qaz nested attributes. */
 176 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
 177         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
 178         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
 179         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
 180 };
 181
 182 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
 183         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
 184 };
 185
 186 /* DCB number of traffic classes nested attributes. */
 187 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
 188         [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
 189         [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
 190         [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
 191         [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
 192 };
 193
 194 static LIST_HEAD(dcb_app_list);
 195 static DEFINE_SPINLOCK(dcb_lock);
 196
 197 /* standard netlink reply call */
 198 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
 199                        u32 seq, u16 flags)
 200 {
 201         struct sk_buff *dcbnl_skb;
 202         struct dcbmsg *dcb;
 203         struct nlmsghdr *nlh;
 204         int ret = -EINVAL;
 205
 206         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 207         if (!dcbnl_skb)
 208                 return ret;
 209
 210         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
 211
 212         dcb = NLMSG_DATA(nlh);
 213         dcb->dcb_family = AF_UNSPEC;
 214         dcb->cmd = cmd;
 215         dcb->dcb_pad = 0;
 216
 217         ret = nla_put_u8(dcbnl_skb, attr, value);
 218         if (ret)
 219                 goto err;
 220
 221         /* end the message, assign the nlmsg_len. */
 222         nlmsg_end(dcbnl_skb, nlh);
 223         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 224         if (ret)
 225                 return -EINVAL;
 226
 227         return 0;
 228 nlmsg_failure:
 229 err:
 230         kfree_skb(dcbnl_skb);
 231         return ret;
 232 }
 233
 234 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
 235                           u32 pid, u32 seq, u16 flags)
 236 {
 237         int ret = -EINVAL;
 238
 239         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
 240         if (!netdev->dcbnl_ops->getstate)
 241                 return ret;
 242
 243         ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
 244                           DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
 245
 246         return ret;
 247 }
 248
 249 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
 250                            u32 pid, u32 seq, u16 flags)
 251 {
 252         struct sk_buff *dcbnl_skb;
 253         struct nlmsghdr *nlh;
 254         struct dcbmsg *dcb;
 255         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
 256         u8 value;
 257         int ret = -EINVAL;
 258         int i;
 259         int getall = 0;
 260
 261         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
 262                 return ret;
 263
 264         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 265                                tb[DCB_ATTR_PFC_CFG],
 266                                dcbnl_pfc_up_nest);
 267         if (ret)
 268                 goto err_out;
 269
 270         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 271         if (!dcbnl_skb)
 272                 goto err_out;
 273
 274         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 275
 276         dcb = NLMSG_DATA(nlh);
 277         dcb->dcb_family = AF_UNSPEC;
 278         dcb->cmd = DCB_CMD_PFC_GCFG;
 279
 280         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
 281         if (!nest)
 282                 goto err;
 283
 284         if (data[DCB_PFC_UP_ATTR_ALL])
 285                 getall = 1;
 286
 287         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 288                 if (!getall && !data[i])
 289                         continue;
 290
 291                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
 292                                              &value);
 293                 ret = nla_put_u8(dcbnl_skb, i, value);
 294
 295                 if (ret) {
 296                         nla_nest_cancel(dcbnl_skb, nest);
 297                         goto err;
 298                 }
 299         }
 300         nla_nest_end(dcbnl_skb, nest);
 301
 302         nlmsg_end(dcbnl_skb, nlh);
 303
 304         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 305         if (ret)
 306                 goto err_out;
 307
 308         return 0;
 309 nlmsg_failure:
 310 err:
 311         kfree_skb(dcbnl_skb);
 312 err_out:
 313         return -EINVAL;
 314 }
 315
 316 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
 317                                 u32 pid, u32 seq, u16 flags)
 318 {
 319         struct sk_buff *dcbnl_skb;
 320         struct nlmsghdr *nlh;
 321         struct dcbmsg *dcb;
 322         u8 perm_addr[MAX_ADDR_LEN];
 323         int ret = -EINVAL;
 324
 325         if (!netdev->dcbnl_ops->getpermhwaddr)
 326                 return ret;
 327
 328         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 329         if (!dcbnl_skb)
 330                 goto err_out;
 331
 332         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 333
 334         dcb = NLMSG_DATA(nlh);
 335         dcb->dcb_family = AF_UNSPEC;
 336         dcb->cmd = DCB_CMD_GPERM_HWADDR;
 337
 338         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
 339
 340         ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
 341                       perm_addr);
 342
 343         nlmsg_end(dcbnl_skb, nlh);
 344
 345         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 346         if (ret)
 347                 goto err_out;
 348
 349         return 0;
 350
 351 nlmsg_failure:
 352         kfree_skb(dcbnl_skb);
 353 err_out:
 354         return -EINVAL;
 355 }
 356
 357 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
 358                         u32 pid, u32 seq, u16 flags)
 359 {
 360         struct sk_buff *dcbnl_skb;
 361         struct nlmsghdr *nlh;
 362         struct dcbmsg *dcb;
 363         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
 364         u8 value;
 365         int ret = -EINVAL;
 366         int i;
 367         int getall = 0;
 368
 369         if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
 370                 return ret;
 371
 372         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
 373                                dcbnl_cap_nest);
 374         if (ret)
 375                 goto err_out;
 376
 377         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 378         if (!dcbnl_skb)
 379                 goto err_out;
 380
 381         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 382
 383         dcb = NLMSG_DATA(nlh);
 384         dcb->dcb_family = AF_UNSPEC;
 385         dcb->cmd = DCB_CMD_GCAP;
 386
 387         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
 388         if (!nest)
 389                 goto err;
 390
 391         if (data[DCB_CAP_ATTR_ALL])
 392                 getall = 1;
 393
 394         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
 395                 if (!getall && !data[i])
 396                         continue;
 397
 398                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
 399                         ret = nla_put_u8(dcbnl_skb, i, value);
 400
 401                         if (ret) {
 402                                 nla_nest_cancel(dcbnl_skb, nest);
 403                                 goto err;
 404                         }
 405                 }
 406         }
 407         nla_nest_end(dcbnl_skb, nest);
 408
 409         nlmsg_end(dcbnl_skb, nlh);
 410
 411         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 412         if (ret)
 413                 goto err_out;
 414
 415         return 0;
 416 nlmsg_failure:
 417 err:
 418         kfree_skb(dcbnl_skb);
 419 err_out:
 420         return -EINVAL;
 421 }
 422
 423 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
 424                            u32 pid, u32 seq, u16 flags)
 425 {
 426         struct sk_buff *dcbnl_skb;
 427         struct nlmsghdr *nlh;
 428         struct dcbmsg *dcb;
 429         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
 430         u8 value;
 431         int ret = -EINVAL;
 432         int i;
 433         int getall = 0;
 434
 435         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
 436                 return ret;
 437
 438         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 439                                dcbnl_numtcs_nest);
 440         if (ret) {
 441                 ret = -EINVAL;
 442                 goto err_out;
 443         }
 444
 445         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 446         if (!dcbnl_skb) {
 447                 ret = -EINVAL;
 448                 goto err_out;
 449         }
 450
 451         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 452
 453         dcb = NLMSG_DATA(nlh);
 454         dcb->dcb_family = AF_UNSPEC;
 455         dcb->cmd = DCB_CMD_GNUMTCS;
 456
 457         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
 458         if (!nest) {
 459                 ret = -EINVAL;
 460                 goto err;
 461         }
 462
 463         if (data[DCB_NUMTCS_ATTR_ALL])
 464                 getall = 1;
 465
 466         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 467                 if (!getall && !data[i])
 468                         continue;
 469
 470                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
 471                 if (!ret) {
 472                         ret = nla_put_u8(dcbnl_skb, i, value);
 473
 474                         if (ret) {
 475                                 nla_nest_cancel(dcbnl_skb, nest);
 476                                 ret = -EINVAL;
 477                                 goto err;
 478                         }
 479                 } else {
 480                         goto err;
 481                 }
 482         }
 483         nla_nest_end(dcbnl_skb, nest);
 484
 485         nlmsg_end(dcbnl_skb, nlh);
 486
 487         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 488         if (ret) {
 489                 ret = -EINVAL;
 490                 goto err_out;
 491         }
 492
 493         return 0;
 494 nlmsg_failure:
 495 err:
 496         kfree_skb(dcbnl_skb);
 497 err_out:
 498         return ret;
 499 }
 500
 501 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
 502                            u32 pid, u32 seq, u16 flags)
 503 {
 504         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
 505         int ret = -EINVAL;
 506         u8 value;
 507         int i;
 508
 509         if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)
 510                 return ret;
 511
 512         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 513                                dcbnl_numtcs_nest);
 514
 515         if (ret) {
 516                 ret = -EINVAL;
 517                 goto err;
 518         }
 519
 520         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 521                 if (data[i] == NULL)
 522                         continue;
 523
 524                 value = nla_get_u8(data[i]);
 525
 526                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
 527
 528                 if (ret)
 529                         goto operr;
 530         }
 531
 532 operr:
 533         ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
 534                           DCB_ATTR_NUMTCS, pid, seq, flags);
 535
 536 err:
 537         return ret;
 538 }
 539
 540 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
 541                              u32 pid, u32 seq, u16 flags)
 542 {
 543         int ret = -EINVAL;
 544
 545         if (!netdev->dcbnl_ops->getpfcstate)
 546                 return ret;
 547
 548         ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
 549                           DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
 550                           pid, seq, flags);
 551
 552         return ret;
 553 }
 554
 555 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
 556                              u32 pid, u32 seq, u16 flags)
 557 {
 558         int ret = -EINVAL;
 559         u8 value;
 560
 561         if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
 562                 return ret;
 563
 564         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
 565
 566         netdev->dcbnl_ops->setpfcstate(netdev, value);
 567
 568         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
 569                           pid, seq, flags);
 570
 571         return ret;
 572 }
 573
 574 static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
 575                         u32 pid, u32 seq, u16 flags)
 576 {
 577         struct sk_buff *dcbnl_skb;
 578         struct nlmsghdr *nlh;
 579         struct dcbmsg *dcb;
 580         struct nlattr *app_nest;
 581         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 582         u16 id;
 583         u8 up, idtype;
 584         int ret = -EINVAL;
 585
 586         if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->getapp)
 587                 goto out;
 588
 589         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
 590                                dcbnl_app_nest);
 591         if (ret)
 592                 goto out;
 593
 594         ret = -EINVAL;
 595         /* all must be non-null */
 596         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 597             (!app_tb[DCB_APP_ATTR_ID]))
 598                 goto out;
 599
 600         /* either by eth type or by socket number */
 601         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 602         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 603             (idtype != DCB_APP_IDTYPE_PORTNUM))
 604                 goto out;
 605
 606         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 607         up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
 608
 609         /* send this back */
 610         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 611         if (!dcbnl_skb)
 612                 goto out;
 613
 614         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 615         dcb = NLMSG_DATA(nlh);
 616         dcb->dcb_family = AF_UNSPEC;
 617         dcb->cmd = DCB_CMD_GAPP;
 618
 619         app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);
 620         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
 621         if (ret)
 622                 goto out_cancel;
 623
 624         ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
 625         if (ret)
 626                 goto out_cancel;
 627
 628         ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
 629         if (ret)
 630                 goto out_cancel;
 631
 632         nla_nest_end(dcbnl_skb, app_nest);
 633         nlmsg_end(dcbnl_skb, nlh);
 634
 635         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 636         if (ret)
 637                 goto nlmsg_failure;
 638
 639         goto out;
 640
 641 out_cancel:
 642         nla_nest_cancel(dcbnl_skb, app_nest);
 643 nlmsg_failure:
 644         kfree_skb(dcbnl_skb);
 645 out:
 646         return ret;
 647 }
 648
 649 static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
 650                         u32 pid, u32 seq, u16 flags)
 651 {
 652         int err, ret = -EINVAL;
 653         u16 id;
 654         u8 up, idtype;
 655         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 656
 657         if (!tb[DCB_ATTR_APP])
 658                 goto out;
 659
 660         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
 661                                dcbnl_app_nest);
 662         if (ret)
 663                 goto out;
 664
 665         ret = -EINVAL;
 666         /* all must be non-null */
 667         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 668             (!app_tb[DCB_APP_ATTR_ID]) ||
 669             (!app_tb[DCB_APP_ATTR_PRIORITY]))
 670                 goto out;
 671
 672         /* either by eth type or by socket number */
 673         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 674         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 675             (idtype != DCB_APP_IDTYPE_PORTNUM))
 676                 goto out;
 677
 678         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 679         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
 680
 681         if (netdev->dcbnl_ops->setapp) {
 682                 err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
 683         } else {
 684                 struct dcb_app app;
 685                 app.selector = idtype;
 686                 app.protocol = id;
 687                 app.priority = up;
 688                 err = dcb_setapp(netdev, &app);
 689         }
 690
 691         ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
 692                           pid, seq, flags);
 693 out:
 694         return ret;
 695 }
 696
 697 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
 698                              u32 pid, u32 seq, u16 flags, int dir)
 699 {
 700         struct sk_buff *dcbnl_skb;
 701         struct nlmsghdr *nlh;
 702         struct dcbmsg *dcb;
 703         struct nlattr *pg_nest, *param_nest, *data;
 704         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 705         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 706         u8 prio, pgid, tc_pct, up_map;
 707         int ret  = -EINVAL;
 708         int getall = 0;
 709         int i;
 710
 711         if (!tb[DCB_ATTR_PG_CFG] ||
 712             !netdev->dcbnl_ops->getpgtccfgtx ||
 713             !netdev->dcbnl_ops->getpgtccfgrx ||
 714             !netdev->dcbnl_ops->getpgbwgcfgtx ||
 715             !netdev->dcbnl_ops->getpgbwgcfgrx)
 716                 return ret;
 717
 718         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
 719                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
 720
 721         if (ret)
 722                 goto err_out;
 723
 724         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 725         if (!dcbnl_skb)
 726                 goto err_out;
 727
 728         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
 729
 730         dcb = NLMSG_DATA(nlh);
 731         dcb->dcb_family = AF_UNSPEC;
 732         dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
 733
 734         pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
 735         if (!pg_nest)
 736                 goto err;
 737
 738         if (pg_tb[DCB_PG_ATTR_TC_ALL])
 739                 getall = 1;
 740
 741         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 742                 if (!getall && !pg_tb[i])
 743                         continue;
 744
 745                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
 746                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
 747                 else
 748                         data = pg_tb[i];
 749                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 750                                        data, dcbnl_tc_param_nest);
 751                 if (ret)
 752                         goto err_pg;
 753
 754                 param_nest = nla_nest_start(dcbnl_skb, i);
 755                 if (!param_nest)
 756                         goto err_pg;
 757
 758                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 759                 prio = DCB_ATTR_VALUE_UNDEFINED;
 760                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 761                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 762
 763                 if (dir) {
 764                         /* Rx */
 765                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
 766                                                 i - DCB_PG_ATTR_TC_0, &prio,
 767                                                 &pgid, &tc_pct, &up_map);
 768                 } else {
 769                         /* Tx */
 770                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
 771                                                 i - DCB_PG_ATTR_TC_0, &prio,
 772                                                 &pgid, &tc_pct, &up_map);
 773                 }
 774
 775                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
 776                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 777                         ret = nla_put_u8(dcbnl_skb,
 778                                          DCB_TC_ATTR_PARAM_PGID, pgid);
 779                         if (ret)
 780                                 goto err_param;
 781                 }
 782                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
 783                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 784                         ret = nla_put_u8(dcbnl_skb,
 785                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
 786                         if (ret)
 787                                 goto err_param;
 788                 }
 789                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
 790                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 791                         ret = nla_put_u8(dcbnl_skb,
 792                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
 793                         if (ret)
 794                                 goto err_param;
 795                 }
 796                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
 797                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 798                         ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
 799                                          tc_pct);
 800                         if (ret)
 801                                 goto err_param;
 802                 }
 803                 nla_nest_end(dcbnl_skb, param_nest);
 804         }
 805
 806         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
 807                 getall = 1;
 808         else
 809                 getall = 0;
 810
 811         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 812                 if (!getall && !pg_tb[i])
 813                         continue;
 814
 815                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 816
 817                 if (dir) {
 818                         /* Rx */
 819                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
 820                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 821                 } else {
 822                         /* Tx */
 823                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
 824                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 825                 }
 826                 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
 827
 828                 if (ret)
 829                         goto err_pg;
 830         }
 831
 832         nla_nest_end(dcbnl_skb, pg_nest);
 833
 834         nlmsg_end(dcbnl_skb, nlh);
 835
 836         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
 837         if (ret)
 838                 goto err_out;
 839
 840         return 0;
 841
 842 err_param:
 843         nla_nest_cancel(dcbnl_skb, param_nest);
 844 err_pg:
 845         nla_nest_cancel(dcbnl_skb, pg_nest);
 846 nlmsg_failure:
 847 err:
 848         kfree_skb(dcbnl_skb);
 849 err_out:
 850         ret  = -EINVAL;
 851         return ret;
 852 }
 853
 854 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
 855                              u32 pid, u32 seq, u16 flags)
 856 {
 857         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
 858 }
 859
 860 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
 861                              u32 pid, u32 seq, u16 flags)
 862 {
 863         return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
 864 }
 865
 866 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
 867                           u32 pid, u32 seq, u16 flags)
 868 {
 869         int ret = -EINVAL;
 870         u8 value;
 871
 872         if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
 873                 return ret;
 874
 875         value = nla_get_u8(tb[DCB_ATTR_STATE]);
 876
 877         ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
 878                           RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
 879                           pid, seq, flags);
 880
 881         return ret;
 882 }
 883
 884 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
 885                            u32 pid, u32 seq, u16 flags)
 886 {
 887         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
 888         int i;
 889         int ret = -EINVAL;
 890         u8 value;
 891
 892         if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
 893                 return ret;
 894
 895         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 896                                tb[DCB_ATTR_PFC_CFG],
 897                                dcbnl_pfc_up_nest);
 898         if (ret)
 899                 goto err;
 900
 901         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 902                 if (data[i] == NULL)
 903                         continue;
 904                 value = nla_get_u8(data[i]);
 905                 netdev->dcbnl_ops->setpfccfg(netdev,
 906                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
 907         }
 908
 909         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
 910                           pid, seq, flags);
 911 err:
 912         return ret;
 913 }
 914
 915 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
 916                         u32 pid, u32 seq, u16 flags)
 917 {
 918         int ret = -EINVAL;
 919
 920         if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
 921                 return ret;
 922
 923         ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
 924                           DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
 925
 926         return ret;
 927 }
 928
 929 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
 930                              u32 pid, u32 seq, u16 flags, int dir)
 931 {
 932         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 933         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 934         int ret = -EINVAL;
 935         int i;
 936         u8 pgid;
 937         u8 up_map;
 938         u8 prio;
 939         u8 tc_pct;
 940
 941         if (!tb[DCB_ATTR_PG_CFG] ||
 942             !netdev->dcbnl_ops->setpgtccfgtx ||
 943             !netdev->dcbnl_ops->setpgtccfgrx ||
 944             !netdev->dcbnl_ops->setpgbwgcfgtx ||
 945             !netdev->dcbnl_ops->setpgbwgcfgrx)
 946                 return ret;
 947
 948         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
 949                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
 950         if (ret)
 951                 goto err;
 952
 953         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 954                 if (!pg_tb[i])
 955                         continue;
 956
 957                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 958                                        pg_tb[i], dcbnl_tc_param_nest);
 959                 if (ret)
 960                         goto err;
 961
 962                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 963                 prio = DCB_ATTR_VALUE_UNDEFINED;
 964                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 965                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 966
 967                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
 968                         prio =
 969                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
 970
 971                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
 972                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
 973
 974                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
 975                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
 976
 977                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
 978                         up_map =
 979                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
 980
 981                 /* dir: Tx = 0, Rx = 1 */
 982                 if (dir) {
 983                         /* Rx */
 984                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
 985                                 i - DCB_PG_ATTR_TC_0,
 986                                 prio, pgid, tc_pct, up_map);
 987                 } else {
 988                         /* Tx */
 989                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
 990                                 i - DCB_PG_ATTR_TC_0,
 991                                 prio, pgid, tc_pct, up_map);
 992                 }
 993         }
 994
 995         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 996                 if (!pg_tb[i])
 997                         continue;
 998
 999                 tc_pct = nla_get_u8(pg_tb[i]);
1000
1001                 /* dir: Tx = 0, Rx = 1 */
1002                 if (dir) {
1003                         /* Rx */
1004                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
1005                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1006                 } else {
1007                         /* Tx */
1008                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
1009                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
1010                 }
1011         }
1012
1013         ret = dcbnl_reply(0, RTM_SETDCB,
1014                           (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
1015                           DCB_ATTR_PG_CFG, pid, seq, flags);
1016
1017 err:
1018         return ret;
1019 }
1020
1021 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
1022                              u32 pid, u32 seq, u16 flags)
1023 {
1024         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
1025 }
1026
1027 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
1028                              u32 pid, u32 seq, u16 flags)
1029 {
1030         return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
1031 }
1032
1033 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
1034                             u32 pid, u32 seq, u16 flags)
1035 {
1036         struct sk_buff *dcbnl_skb;
1037         struct nlmsghdr *nlh;
1038         struct dcbmsg *dcb;
1039         struct nlattr *bcn_nest;
1040         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
1041         u8 value_byte;
1042         u32 value_integer;
1043         int ret  = -EINVAL;
1044         bool getall = false;
1045         int i;
1046
1047         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
1048             !netdev->dcbnl_ops->getbcncfg)
1049                 return ret;
1050
1051         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
1052                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
1053
1054         if (ret)
1055                 goto err_out;
1056
1057         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1058         if (!dcbnl_skb)
1059                 goto err_out;
1060
1061         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1062
1063         dcb = NLMSG_DATA(nlh);
1064         dcb->dcb_family = AF_UNSPEC;
1065         dcb->cmd = DCB_CMD_BCN_GCFG;
1066
1067         bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
1068         if (!bcn_nest)
1069                 goto err;
1070
1071         if (bcn_tb[DCB_BCN_ATTR_ALL])
1072                 getall = true;
1073
1074         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1075                 if (!getall && !bcn_tb[i])
1076                         continue;
1077
1078                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
1079                                             &value_byte);
1080                 ret = nla_put_u8(dcbnl_skb, i, value_byte);
1081                 if (ret)
1082                         goto err_bcn;
1083         }
1084
1085         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1086                 if (!getall && !bcn_tb[i])
1087                         continue;
1088
1089                 netdev->dcbnl_ops->getbcncfg(netdev, i,
1090                                              &value_integer);
1091                 ret = nla_put_u32(dcbnl_skb, i, value_integer);
1092                 if (ret)
1093                         goto err_bcn;
1094         }
1095
1096         nla_nest_end(dcbnl_skb, bcn_nest);
1097
1098         nlmsg_end(dcbnl_skb, nlh);
1099
1100         ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
1101         if (ret)
1102                 goto err_out;
1103
1104         return 0;
1105
1106 err_bcn:
1107         nla_nest_cancel(dcbnl_skb, bcn_nest);
1108 nlmsg_failure:
1109 err:
1110         kfree_skb(dcbnl_skb);
1111 err_out:
1112         ret  = -EINVAL;
1113         return ret;
1114 }
1115
1116 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
1117                             u32 pid, u32 seq, u16 flags)
1118 {
1119         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
1120         int i;
1121         int ret = -EINVAL;
1122         u8 value_byte;
1123         u32 value_int;
1124
1125         if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
1126             !netdev->dcbnl_ops->setbcnrp)
1127                 return ret;
1128
1129         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
1130                                tb[DCB_ATTR_BCN],
1131                                dcbnl_pfc_up_nest);
1132         if (ret)
1133                 goto err;
1134
1135         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
1136                 if (data[i] == NULL)
1137                         continue;
1138                 value_byte = nla_get_u8(data[i]);
1139                 netdev->dcbnl_ops->setbcnrp(netdev,
1140                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
1141         }
1142
1143         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
1144                 if (data[i] == NULL)
1145                         continue;
1146                 value_int = nla_get_u32(data[i]);
1147                 netdev->dcbnl_ops->setbcncfg(netdev,
1148                                              i, value_int);
1149         }
1150
1151         ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
1152                           pid, seq, flags);
1153 err:
1154         return ret;
1155 }
1156
1157 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1158  * be completed the entire msg is aborted and error value is returned.
1159  * No attempt is made to reconcile the case where only part of the
1160  * cmd can be completed.
1161  */
1162 static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
1163                           u32 pid, u32 seq, u16 flags)
1164 {
1165         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1166         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1167         int err = -EOPNOTSUPP;
1168
1169         if (!ops)
1170                 goto err;
1171
1172         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1173                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1174         if (err)
1175                 goto err;
1176
1177         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1178                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1179                 err = ops->ieee_setets(netdev, ets);
1180                 if (err)
1181                         goto err;
1182         }
1183
1184         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setets) {
1185                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1186                 err = ops->ieee_setpfc(netdev, pfc);
1187                 if (err)
1188                         goto err;
1189         }
1190
1191         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1192                 struct nlattr *attr;
1193                 int rem;
1194
1195                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1196                         struct dcb_app *app_data;
1197                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1198                                 continue;
1199                         app_data = nla_data(attr);
1200                         if (ops->ieee_setapp)
1201                                 err = ops->ieee_setapp(netdev, app_data);
1202                         else
1203                                 err = dcb_setapp(netdev, app_data);
1204                         if (err)
1205                                 goto err;
1206                 }
1207         }
1208
1209 err:
1210         dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
1211                     pid, seq, flags);
1212         return err;
1213 }
1214
1215
1216 /* Handle IEEE 802.1Qaz GET commands. */
1217 static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
1218                           u32 pid, u32 seq, u16 flags)
1219 {
1220         struct sk_buff *skb;
1221         struct nlmsghdr *nlh;
1222         struct dcbmsg *dcb;
1223         struct nlattr *ieee, *app;
1224         struct dcb_app_type *itr;
1225         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1226         int err;
1227
1228         if (!ops)
1229                 return -EOPNOTSUPP;
1230
1231         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1232         if (!skb)
1233                 return -ENOBUFS;
1234
1235         nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1236
1237         dcb = NLMSG_DATA(nlh);
1238         dcb->dcb_family = AF_UNSPEC;
1239         dcb->cmd = DCB_CMD_IEEE_GET;
1240
1241         NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
1242
1243         ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1244         if (!ieee)
1245                 goto nla_put_failure;
1246
1247         if (ops->ieee_getets) {
1248                 struct ieee_ets ets;
1249                 err = ops->ieee_getets(netdev, &ets);
1250                 if (!err)
1251                         NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
1252         }
1253
1254         if (ops->ieee_getpfc) {
1255                 struct ieee_pfc pfc;
1256                 err = ops->ieee_getpfc(netdev, &pfc);
1257                 if (!err)
1258                         NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
1259         }
1260
1261         app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1262         if (!app)
1263                 goto nla_put_failure;
1264
1265         spin_lock(&dcb_lock);
1266         list_for_each_entry(itr, &dcb_app_list, list) {
1267                 if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) {
1268                         err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1269                                          &itr->app);
1270                         if (err) {
1271                                 spin_unlock(&dcb_lock);
1272                                 goto nla_put_failure;
1273                         }
1274                 }
1275         }
1276         spin_unlock(&dcb_lock);
1277         nla_nest_end(skb, app);
1278
1279         nla_nest_end(skb, ieee);
1280         nlmsg_end(skb, nlh);
1281
1282         return rtnl_unicast(skb, &init_net, pid);
1283 nla_put_failure:
1284         nlmsg_cancel(skb, nlh);
1285 nlmsg_failure:
1286         kfree_skb(skb);
1287         return -1;
1288 }
1289
1290 /* DCBX configuration */
1291 static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
1292                          u32 pid, u32 seq, u16 flags)
1293 {
1294         int ret;
1295
1296         if (!netdev->dcbnl_ops->getdcbx)
1297                 return -EOPNOTSUPP;
1298
1299         ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
1300                           DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
1301
1302         return ret;
1303 }
1304
1305 static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
1306                          u32 pid, u32 seq, u16 flags)
1307 {
1308         int ret;
1309         u8 value;
1310
1311         if (!netdev->dcbnl_ops->setdcbx)
1312                 return -EOPNOTSUPP;
1313
1314         if (!tb[DCB_ATTR_DCBX])
1315                 return -EINVAL;
1316
1317         value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1318
1319         ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
1320                           RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
1321                           pid, seq, flags);
1322
1323         return ret;
1324 }
1325
1326 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
1327                             u32 pid, u32 seq, u16 flags)
1328 {
1329         struct sk_buff *dcbnl_skb;
1330         struct nlmsghdr *nlh;
1331         struct dcbmsg *dcb;
1332         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1333         u8 value;
1334         int ret, i;
1335         int getall = 0;
1336
1337         if (!netdev->dcbnl_ops->getfeatcfg)
1338                 return -EOPNOTSUPP;
1339
1340         if (!tb[DCB_ATTR_FEATCFG])
1341                 return -EINVAL;
1342
1343         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1344                                dcbnl_featcfg_nest);
1345         if (ret)
1346                 goto err_out;
1347
1348         dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1349         if (!dcbnl_skb) {
1350                 ret = -ENOBUFS;
1351                 goto err_out;
1352         }
1353
1354         nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
1355
1356         dcb = NLMSG_DATA(nlh);
1357         dcb->dcb_family = AF_UNSPEC;
1358         dcb->cmd = DCB_CMD_GFEATCFG;
1359
1360         nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
1361         if (!nest) {
1362                 ret = -EMSGSIZE;
1363                 goto nla_put_failure;
1364         }
1365
1366         if (data[DCB_FEATCFG_ATTR_ALL])
1367                 getall = 1;
1368
1369         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1370                 if (!getall && !data[i])
1371                         continue;
1372
1373                 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1374                 if (!ret)
1375                         ret = nla_put_u8(dcbnl_skb, i, value);
1376
1377                 if (ret) {
1378                         nla_nest_cancel(dcbnl_skb, nest);
1379                         goto nla_put_failure;
1380                 }
1381         }
1382         nla_nest_end(dcbnl_skb, nest);
1383
1384         nlmsg_end(dcbnl_skb, nlh);
1385
1386         return rtnl_unicast(dcbnl_skb, &init_net, pid);
1387 nla_put_failure:
1388         nlmsg_cancel(dcbnl_skb, nlh);
1389 nlmsg_failure:
1390         kfree_skb(dcbnl_skb);
1391 err_out:
1392         return ret;
1393 }
1394
1395 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
1396                             u32 pid, u32 seq, u16 flags)
1397 {
1398         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1399         int ret, i;
1400         u8 value;
1401
1402         if (!netdev->dcbnl_ops->setfeatcfg)
1403                 return -ENOTSUPP;
1404
1405         if (!tb[DCB_ATTR_FEATCFG])
1406                 return -EINVAL;
1407
1408         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1409                                dcbnl_featcfg_nest);
1410
1411         if (ret)
1412                 goto err;
1413
1414         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1415                 if (data[i] == NULL)
1416                         continue;
1417
1418                 value = nla_get_u8(data[i]);
1419
1420                 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1421
1422                 if (ret)
1423                         goto err;
1424         }
1425 err:
1426         dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
1427                     pid, seq, flags);
1428
1429         return ret;
1430 }
1431
1432 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1433 {
1434         struct net *net = sock_net(skb->sk);
1435         struct net_device *netdev;
1436         struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
1437         struct nlattr *tb[DCB_ATTR_MAX + 1];
1438         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
1439         int ret = -EINVAL;
1440
1441         if (!net_eq(net, &init_net))
1442                 return -EINVAL;
1443
1444         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1445                           dcbnl_rtnl_policy);
1446         if (ret < 0)
1447                 return ret;
1448
1449         if (!tb[DCB_ATTR_IFNAME])
1450                 return -EINVAL;
1451
1452         netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
1453         if (!netdev)
1454                 return -EINVAL;
1455
1456         if (!netdev->dcbnl_ops)
1457                 goto errout;
1458
1459         switch (dcb->cmd) {
1460         case DCB_CMD_GSTATE:
1461                 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
1462                                      nlh->nlmsg_flags);
1463                 goto out;
1464         case DCB_CMD_PFC_GCFG:
1465                 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1466                                       nlh->nlmsg_flags);
1467                 goto out;
1468         case DCB_CMD_GPERM_HWADDR:
1469                 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
1470                                            nlh->nlmsg_flags);
1471                 goto out;
1472         case DCB_CMD_PGTX_GCFG:
1473                 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1474                                         nlh->nlmsg_flags);
1475                 goto out;
1476         case DCB_CMD_PGRX_GCFG:
1477                 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1478                                         nlh->nlmsg_flags);
1479                 goto out;
1480         case DCB_CMD_BCN_GCFG:
1481                 ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
1482                                        nlh->nlmsg_flags);
1483                 goto out;
1484         case DCB_CMD_SSTATE:
1485                 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
1486                                      nlh->nlmsg_flags);
1487                 goto out;
1488         case DCB_CMD_PFC_SCFG:
1489                 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
1490                                       nlh->nlmsg_flags);
1491                 goto out;
1492
1493         case DCB_CMD_SET_ALL:
1494                 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
1495                                    nlh->nlmsg_flags);
1496                 goto out;
1497         case DCB_CMD_PGTX_SCFG:
1498                 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1499                                         nlh->nlmsg_flags);
1500                 goto out;
1501         case DCB_CMD_PGRX_SCFG:
1502                 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1503                                         nlh->nlmsg_flags);
1504                 goto out;
1505         case DCB_CMD_GCAP:
1506                 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
1507                                    nlh->nlmsg_flags);
1508                 goto out;
1509         case DCB_CMD_GNUMTCS:
1510                 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1511                                       nlh->nlmsg_flags);
1512                 goto out;
1513         case DCB_CMD_SNUMTCS:
1514                 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
1515                                       nlh->nlmsg_flags);
1516                 goto out;
1517         case DCB_CMD_PFC_GSTATE:
1518                 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1519                                         nlh->nlmsg_flags);
1520                 goto out;
1521         case DCB_CMD_PFC_SSTATE:
1522                 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
1523                                         nlh->nlmsg_flags);
1524                 goto out;
1525         case DCB_CMD_BCN_SCFG:
1526                 ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
1527                                        nlh->nlmsg_flags);
1528                 goto out;
1529         case DCB_CMD_GAPP:
1530                 ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
1531                                    nlh->nlmsg_flags);
1532                 goto out;
1533         case DCB_CMD_SAPP:
1534                 ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
1535                                    nlh->nlmsg_flags);
1536                 goto out;
1537         case DCB_CMD_IEEE_SET:
1538                 ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,
1539                                  nlh->nlmsg_flags);
1540                 goto out;
1541         case DCB_CMD_IEEE_GET:
1542                 ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,
1543                                  nlh->nlmsg_flags);
1544                 goto out;
1545         case DCB_CMD_GDCBX:
1546                 ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1547                                     nlh->nlmsg_flags);
1548                 goto out;
1549         case DCB_CMD_SDCBX:
1550                 ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
1551                                     nlh->nlmsg_flags);
1552                 goto out;
1553         case DCB_CMD_GFEATCFG:
1554                 ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1555                                        nlh->nlmsg_flags);
1556                 goto out;
1557         case DCB_CMD_SFEATCFG:
1558                 ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
1559                                        nlh->nlmsg_flags);
1560                 goto out;
1561         default:
1562                 goto errout;
1563         }
1564 errout:
1565         ret = -EINVAL;
1566 out:
1567         dev_put(netdev);
1568         return ret;
1569 }
1570
1571 /**
1572  * dcb_getapp - retrieve the DCBX application user priority
1573  *
1574  * On success returns a non-zero 802.1p user priority bitmap
1575  * otherwise returns 0 as the invalid user priority bitmap to
1576  * indicate an error.
1577  */
1578 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1579 {
1580         struct dcb_app_type *itr;
1581         u8 prio = 0;
1582
1583         spin_lock(&dcb_lock);
1584         list_for_each_entry(itr, &dcb_app_list, list) {
1585                 if (itr->app.selector == app->selector &&
1586                     itr->app.protocol == app->protocol &&
1587                     (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1588                         prio = itr->app.priority;
1589                         break;
1590                 }
1591         }
1592         spin_unlock(&dcb_lock);
1593
1594         return prio;
1595 }
1596 EXPORT_SYMBOL(dcb_getapp);
1597
1598 /**
1599  * ixgbe_dcbnl_setapp - add dcb application data to app list
1600  *
1601  * Priority 0 is the default priority this removes applications
1602  * from the app list if the priority is set to zero.
1603  */
1604 u8 dcb_setapp(struct net_device *dev, struct dcb_app *new)
1605 {
1606         struct dcb_app_type *itr;
1607
1608         spin_lock(&dcb_lock);
1609         /* Search for existing match and replace */
1610         list_for_each_entry(itr, &dcb_app_list, list) {
1611                 if (itr->app.selector == new->selector &&
1612                     itr->app.protocol == new->protocol &&
1613                     (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
1614                         if (new->priority)
1615                                 itr->app.priority = new->priority;
1616                         else {
1617                                 list_del(&itr->list);
1618                                 kfree(itr);
1619                         }
1620                         goto out;
1621                 }
1622         }
1623         /* App type does not exist add new application type */
1624         if (new->priority) {
1625                 struct dcb_app_type *entry;
1626                 entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
1627                 if (!entry) {
1628                         spin_unlock(&dcb_lock);
1629                         return -ENOMEM;
1630                 }
1631
1632                 memcpy(&entry->app, new, sizeof(*new));
1633                 strncpy(entry->name, dev->name, IFNAMSIZ);
1634                 list_add(&entry->list, &dcb_app_list);
1635         }
1636 out:
1637         spin_unlock(&dcb_lock);
1638         call_dcbevent_notifiers(DCB_APP_EVENT, new);
1639         return 0;
1640 }
1641 EXPORT_SYMBOL(dcb_setapp);
1642
1643 static void dcb_flushapp(void)
1644 {
1645         struct dcb_app_type *app;
1646         struct dcb_app_type *tmp;
1647
1648         spin_lock(&dcb_lock);
1649         list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1650                 list_del(&app->list);
1651                 kfree(app);
1652         }
1653         spin_unlock(&dcb_lock);
1654 }
1655
1656 static int __init dcbnl_init(void)
1657 {
1658         INIT_LIST_HEAD(&dcb_app_list);
1659
1660         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
1661         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
1662
1663         return 0;
1664 }
1665 module_init(dcbnl_init);
1666
1667 static void __exit dcbnl_exit(void)
1668 {
1669         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1670         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1671         dcb_flushapp();
1672 }
1673 module_exit(dcbnl_exit);