net/dcb/dcbnl.c

   1 /*
   2  * Copyright (c) 2008-2011, 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, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Description: Data Center Bridging netlink interface
  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 <linux/init.h>
  29 #include <net/sock.h>
  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 /**************** DCB attribute policies *************************************/
  53
  54 /* DCB netlink attributes policy */
  55 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
  56         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  57         [DCB_ATTR_STATE]       = {.type = NLA_U8},
  58         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  59         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  60         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
  61         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
  62         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  63         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  64         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
  65         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
  66         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
  67         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
  68         [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
  69 };
  70
  71 /* DCB priority flow control to User Priority nested attributes */
  72 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
  73         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  74         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  75         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  76         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  77         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  78         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  79         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  80         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  81         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  82 };
  83
  84 /* DCB priority grouping nested attributes */
  85 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
  86         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  87         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  88         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  89         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  90         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  91         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  92         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  93         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  94         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  95         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
  96         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
  97         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
  98         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
  99         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
 100         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
 101         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
 102         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
 103         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
 104 };
 105
 106 /* DCB traffic class nested attributes. */
 107 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
 108         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
 109         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
 110         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
 111         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
 112         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
 113 };
 114
 115 /* DCB capabilities nested attributes. */
 116 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
 117         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
 118         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
 119         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
 120         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
 121         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
 122         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
 123         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
 124         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
 125         [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
 126 };
 127
 128 /* DCB capabilities nested attributes. */
 129 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
 130         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
 131         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
 132         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
 133 };
 134
 135 /* DCB BCN nested attributes. */
 136 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
 137         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
 138         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
 139         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
 140         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
 141         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
 142         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
 143         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
 144         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
 145         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
 146         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
 147         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
 148         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
 149         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
 150         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
 151         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
 152         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
 153         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
 154         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
 155         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
 156         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
 157         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
 158         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
 159         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
 160         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
 161         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
 162 };
 163
 164 /* DCB APP nested attributes. */
 165 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
 166         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
 167         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
 168         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
 169 };
 170
 171 /* IEEE 802.1Qaz nested attributes. */
 172 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
 173         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
 174         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
 175         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
 176         [DCB_ATTR_IEEE_MAXRATE]   = {.len = sizeof(struct ieee_maxrate)},
 177         [DCB_ATTR_IEEE_QCN]         = {.len = sizeof(struct ieee_qcn)},
 178         [DCB_ATTR_IEEE_QCN_STATS]   = {.len = sizeof(struct ieee_qcn_stats)},
 179 };
 180
 181 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
 182         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
 183 };
 184
 185 /* DCB number of traffic classes nested attributes. */
 186 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
 187         [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
 188         [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
 189         [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
 190         [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
 191 };
 192
 193 static LIST_HEAD(dcb_app_list);
 194 static DEFINE_SPINLOCK(dcb_lock);
 195
 196 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
 197                                     u32 flags, struct nlmsghdr **nlhp)
 198 {
 199         struct sk_buff *skb;
 200         struct dcbmsg *dcb;
 201         struct nlmsghdr *nlh;
 202
 203         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 204         if (!skb)
 205                 return NULL;
 206
 207         nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
 208         BUG_ON(!nlh);
 209
 210         dcb = nlmsg_data(nlh);
 211         dcb->dcb_family = AF_UNSPEC;
 212         dcb->cmd = cmd;
 213         dcb->dcb_pad = 0;
 214
 215         if (nlhp)
 216                 *nlhp = nlh;
 217
 218         return skb;
 219 }
 220
 221 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
 222                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 223 {
 224         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
 225         if (!netdev->dcbnl_ops->getstate)
 226                 return -EOPNOTSUPP;
 227
 228         return nla_put_u8(skb, DCB_ATTR_STATE,
 229                           netdev->dcbnl_ops->getstate(netdev));
 230 }
 231
 232 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 233                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 234 {
 235         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
 236         u8 value;
 237         int ret;
 238         int i;
 239         int getall = 0;
 240
 241         if (!tb[DCB_ATTR_PFC_CFG])
 242                 return -EINVAL;
 243
 244         if (!netdev->dcbnl_ops->getpfccfg)
 245                 return -EOPNOTSUPP;
 246
 247         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 248                                tb[DCB_ATTR_PFC_CFG], dcbnl_pfc_up_nest, NULL);
 249         if (ret)
 250                 return ret;
 251
 252         nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
 253         if (!nest)
 254                 return -EMSGSIZE;
 255
 256         if (data[DCB_PFC_UP_ATTR_ALL])
 257                 getall = 1;
 258
 259         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 260                 if (!getall && !data[i])
 261                         continue;
 262
 263                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
 264                                              &value);
 265                 ret = nla_put_u8(skb, i, value);
 266                 if (ret) {
 267                         nla_nest_cancel(skb, nest);
 268                         return ret;
 269                 }
 270         }
 271         nla_nest_end(skb, nest);
 272
 273         return 0;
 274 }
 275
 276 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
 277                                 u32 seq, struct nlattr **tb, struct sk_buff *skb)
 278 {
 279         u8 perm_addr[MAX_ADDR_LEN];
 280
 281         if (!netdev->dcbnl_ops->getpermhwaddr)
 282                 return -EOPNOTSUPP;
 283
 284         memset(perm_addr, 0, sizeof(perm_addr));
 285         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
 286
 287         return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
 288 }
 289
 290 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
 291                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 292 {
 293         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
 294         u8 value;
 295         int ret;
 296         int i;
 297         int getall = 0;
 298
 299         if (!tb[DCB_ATTR_CAP])
 300                 return -EINVAL;
 301
 302         if (!netdev->dcbnl_ops->getcap)
 303                 return -EOPNOTSUPP;
 304
 305         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
 306                                dcbnl_cap_nest, NULL);
 307         if (ret)
 308                 return ret;
 309
 310         nest = nla_nest_start(skb, DCB_ATTR_CAP);
 311         if (!nest)
 312                 return -EMSGSIZE;
 313
 314         if (data[DCB_CAP_ATTR_ALL])
 315                 getall = 1;
 316
 317         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
 318                 if (!getall && !data[i])
 319                         continue;
 320
 321                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
 322                         ret = nla_put_u8(skb, i, value);
 323                         if (ret) {
 324                                 nla_nest_cancel(skb, nest);
 325                                 return ret;
 326                         }
 327                 }
 328         }
 329         nla_nest_end(skb, nest);
 330
 331         return 0;
 332 }
 333
 334 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
 335                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 336 {
 337         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
 338         u8 value;
 339         int ret;
 340         int i;
 341         int getall = 0;
 342
 343         if (!tb[DCB_ATTR_NUMTCS])
 344                 return -EINVAL;
 345
 346         if (!netdev->dcbnl_ops->getnumtcs)
 347                 return -EOPNOTSUPP;
 348
 349         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 350                                dcbnl_numtcs_nest, NULL);
 351         if (ret)
 352                 return ret;
 353
 354         nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
 355         if (!nest)
 356                 return -EMSGSIZE;
 357
 358         if (data[DCB_NUMTCS_ATTR_ALL])
 359                 getall = 1;
 360
 361         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 362                 if (!getall && !data[i])
 363                         continue;
 364
 365                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
 366                 if (!ret) {
 367                         ret = nla_put_u8(skb, i, value);
 368                         if (ret) {
 369                                 nla_nest_cancel(skb, nest);
 370                                 return ret;
 371                         }
 372                 } else
 373                         return -EINVAL;
 374         }
 375         nla_nest_end(skb, nest);
 376
 377         return 0;
 378 }
 379
 380 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
 381                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 382 {
 383         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
 384         int ret;
 385         u8 value;
 386         int i;
 387
 388         if (!tb[DCB_ATTR_NUMTCS])
 389                 return -EINVAL;
 390
 391         if (!netdev->dcbnl_ops->setnumtcs)
 392                 return -EOPNOTSUPP;
 393
 394         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 395                                dcbnl_numtcs_nest, NULL);
 396         if (ret)
 397                 return ret;
 398
 399         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 400                 if (data[i] == NULL)
 401                         continue;
 402
 403                 value = nla_get_u8(data[i]);
 404
 405                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
 406                 if (ret)
 407                         break;
 408         }
 409
 410         return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
 411 }
 412
 413 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
 414                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 415 {
 416         if (!netdev->dcbnl_ops->getpfcstate)
 417                 return -EOPNOTSUPP;
 418
 419         return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
 420                           netdev->dcbnl_ops->getpfcstate(netdev));
 421 }
 422
 423 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
 424                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 425 {
 426         u8 value;
 427
 428         if (!tb[DCB_ATTR_PFC_STATE])
 429                 return -EINVAL;
 430
 431         if (!netdev->dcbnl_ops->setpfcstate)
 432                 return -EOPNOTSUPP;
 433
 434         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
 435
 436         netdev->dcbnl_ops->setpfcstate(netdev, value);
 437
 438         return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
 439 }
 440
 441 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
 442                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 443 {
 444         struct nlattr *app_nest;
 445         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 446         u16 id;
 447         u8 up, idtype;
 448         int ret;
 449
 450         if (!tb[DCB_ATTR_APP])
 451                 return -EINVAL;
 452
 453         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
 454                                dcbnl_app_nest, NULL);
 455         if (ret)
 456                 return ret;
 457
 458         /* all must be non-null */
 459         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 460             (!app_tb[DCB_APP_ATTR_ID]))
 461                 return -EINVAL;
 462
 463         /* either by eth type or by socket number */
 464         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 465         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 466             (idtype != DCB_APP_IDTYPE_PORTNUM))
 467                 return -EINVAL;
 468
 469         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 470
 471         if (netdev->dcbnl_ops->getapp) {
 472                 ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
 473                 if (ret < 0)
 474                         return ret;
 475                 else
 476                         up = ret;
 477         } else {
 478                 struct dcb_app app = {
 479                                         .selector = idtype,
 480                                         .protocol = id,
 481                                      };
 482                 up = dcb_getapp(netdev, &app);
 483         }
 484
 485         app_nest = nla_nest_start(skb, DCB_ATTR_APP);
 486         if (!app_nest)
 487                 return -EMSGSIZE;
 488
 489         ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
 490         if (ret)
 491                 goto out_cancel;
 492
 493         ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
 494         if (ret)
 495                 goto out_cancel;
 496
 497         ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
 498         if (ret)
 499                 goto out_cancel;
 500
 501         nla_nest_end(skb, app_nest);
 502
 503         return 0;
 504
 505 out_cancel:
 506         nla_nest_cancel(skb, app_nest);
 507         return ret;
 508 }
 509
 510 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
 511                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 512 {
 513         int ret;
 514         u16 id;
 515         u8 up, idtype;
 516         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 517
 518         if (!tb[DCB_ATTR_APP])
 519                 return -EINVAL;
 520
 521         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
 522                                dcbnl_app_nest, NULL);
 523         if (ret)
 524                 return ret;
 525
 526         /* all must be non-null */
 527         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 528             (!app_tb[DCB_APP_ATTR_ID]) ||
 529             (!app_tb[DCB_APP_ATTR_PRIORITY]))
 530                 return -EINVAL;
 531
 532         /* either by eth type or by socket number */
 533         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 534         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 535             (idtype != DCB_APP_IDTYPE_PORTNUM))
 536                 return -EINVAL;
 537
 538         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 539         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
 540
 541         if (netdev->dcbnl_ops->setapp) {
 542                 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
 543                 if (ret < 0)
 544                         return ret;
 545         } else {
 546                 struct dcb_app app;
 547                 app.selector = idtype;
 548                 app.protocol = id;
 549                 app.priority = up;
 550                 ret = dcb_setapp(netdev, &app);
 551         }
 552
 553         ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
 554         dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
 555
 556         return ret;
 557 }
 558
 559 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 560                              struct nlattr **tb, struct sk_buff *skb, int dir)
 561 {
 562         struct nlattr *pg_nest, *param_nest, *data;
 563         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 564         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 565         u8 prio, pgid, tc_pct, up_map;
 566         int ret;
 567         int getall = 0;
 568         int i;
 569
 570         if (!tb[DCB_ATTR_PG_CFG])
 571                 return -EINVAL;
 572
 573         if (!netdev->dcbnl_ops->getpgtccfgtx ||
 574             !netdev->dcbnl_ops->getpgtccfgrx ||
 575             !netdev->dcbnl_ops->getpgbwgcfgtx ||
 576             !netdev->dcbnl_ops->getpgbwgcfgrx)
 577                 return -EOPNOTSUPP;
 578
 579         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, tb[DCB_ATTR_PG_CFG],
 580                                dcbnl_pg_nest, NULL);
 581         if (ret)
 582                 return ret;
 583
 584         pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
 585         if (!pg_nest)
 586                 return -EMSGSIZE;
 587
 588         if (pg_tb[DCB_PG_ATTR_TC_ALL])
 589                 getall = 1;
 590
 591         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 592                 if (!getall && !pg_tb[i])
 593                         continue;
 594
 595                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
 596                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
 597                 else
 598                         data = pg_tb[i];
 599                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX, data,
 600                                        dcbnl_tc_param_nest, NULL);
 601                 if (ret)
 602                         goto err_pg;
 603
 604                 param_nest = nla_nest_start(skb, i);
 605                 if (!param_nest)
 606                         goto err_pg;
 607
 608                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 609                 prio = DCB_ATTR_VALUE_UNDEFINED;
 610                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 611                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 612
 613                 if (dir) {
 614                         /* Rx */
 615                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
 616                                                 i - DCB_PG_ATTR_TC_0, &prio,
 617                                                 &pgid, &tc_pct, &up_map);
 618                 } else {
 619                         /* Tx */
 620                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
 621                                                 i - DCB_PG_ATTR_TC_0, &prio,
 622                                                 &pgid, &tc_pct, &up_map);
 623                 }
 624
 625                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
 626                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 627                         ret = nla_put_u8(skb,
 628                                          DCB_TC_ATTR_PARAM_PGID, pgid);
 629                         if (ret)
 630                                 goto err_param;
 631                 }
 632                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
 633                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 634                         ret = nla_put_u8(skb,
 635                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
 636                         if (ret)
 637                                 goto err_param;
 638                 }
 639                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
 640                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 641                         ret = nla_put_u8(skb,
 642                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
 643                         if (ret)
 644                                 goto err_param;
 645                 }
 646                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
 647                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 648                         ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
 649                                          tc_pct);
 650                         if (ret)
 651                                 goto err_param;
 652                 }
 653                 nla_nest_end(skb, param_nest);
 654         }
 655
 656         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
 657                 getall = 1;
 658         else
 659                 getall = 0;
 660
 661         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 662                 if (!getall && !pg_tb[i])
 663                         continue;
 664
 665                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 666
 667                 if (dir) {
 668                         /* Rx */
 669                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
 670                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 671                 } else {
 672                         /* Tx */
 673                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
 674                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 675                 }
 676                 ret = nla_put_u8(skb, i, tc_pct);
 677                 if (ret)
 678                         goto err_pg;
 679         }
 680
 681         nla_nest_end(skb, pg_nest);
 682
 683         return 0;
 684
 685 err_param:
 686         nla_nest_cancel(skb, param_nest);
 687 err_pg:
 688         nla_nest_cancel(skb, pg_nest);
 689
 690         return -EMSGSIZE;
 691 }
 692
 693 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 694                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 695 {
 696         return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
 697 }
 698
 699 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 700                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 701 {
 702         return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
 703 }
 704
 705 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
 706                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 707 {
 708         u8 value;
 709
 710         if (!tb[DCB_ATTR_STATE])
 711                 return -EINVAL;
 712
 713         if (!netdev->dcbnl_ops->setstate)
 714                 return -EOPNOTSUPP;
 715
 716         value = nla_get_u8(tb[DCB_ATTR_STATE]);
 717
 718         return nla_put_u8(skb, DCB_ATTR_STATE,
 719                           netdev->dcbnl_ops->setstate(netdev, value));
 720 }
 721
 722 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 723                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 724 {
 725         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
 726         int i;
 727         int ret;
 728         u8 value;
 729
 730         if (!tb[DCB_ATTR_PFC_CFG])
 731                 return -EINVAL;
 732
 733         if (!netdev->dcbnl_ops->setpfccfg)
 734                 return -EOPNOTSUPP;
 735
 736         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 737                                tb[DCB_ATTR_PFC_CFG], dcbnl_pfc_up_nest, NULL);
 738         if (ret)
 739                 return ret;
 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         return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
 750 }
 751
 752 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
 753                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 754 {
 755         int ret;
 756
 757         if (!tb[DCB_ATTR_SET_ALL])
 758                 return -EINVAL;
 759
 760         if (!netdev->dcbnl_ops->setall)
 761                 return -EOPNOTSUPP;
 762
 763         ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
 764                          netdev->dcbnl_ops->setall(netdev));
 765         dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
 766
 767         return ret;
 768 }
 769
 770 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 771                              u32 seq, struct nlattr **tb, struct sk_buff *skb,
 772                              int dir)
 773 {
 774         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 775         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 776         int ret;
 777         int i;
 778         u8 pgid;
 779         u8 up_map;
 780         u8 prio;
 781         u8 tc_pct;
 782
 783         if (!tb[DCB_ATTR_PG_CFG])
 784                 return -EINVAL;
 785
 786         if (!netdev->dcbnl_ops->setpgtccfgtx ||
 787             !netdev->dcbnl_ops->setpgtccfgrx ||
 788             !netdev->dcbnl_ops->setpgbwgcfgtx ||
 789             !netdev->dcbnl_ops->setpgbwgcfgrx)
 790                 return -EOPNOTSUPP;
 791
 792         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, tb[DCB_ATTR_PG_CFG],
 793                                dcbnl_pg_nest, NULL);
 794         if (ret)
 795                 return ret;
 796
 797         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 798                 if (!pg_tb[i])
 799                         continue;
 800
 801                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 802                                        pg_tb[i], dcbnl_tc_param_nest, NULL);
 803                 if (ret)
 804                         return ret;
 805
 806                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 807                 prio = DCB_ATTR_VALUE_UNDEFINED;
 808                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 809                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 810
 811                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
 812                         prio =
 813                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
 814
 815                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
 816                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
 817
 818                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
 819                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
 820
 821                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
 822                         up_map =
 823                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
 824
 825                 /* dir: Tx = 0, Rx = 1 */
 826                 if (dir) {
 827                         /* Rx */
 828                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
 829                                 i - DCB_PG_ATTR_TC_0,
 830                                 prio, pgid, tc_pct, up_map);
 831                 } else {
 832                         /* Tx */
 833                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
 834                                 i - DCB_PG_ATTR_TC_0,
 835                                 prio, pgid, tc_pct, up_map);
 836                 }
 837         }
 838
 839         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 840                 if (!pg_tb[i])
 841                         continue;
 842
 843                 tc_pct = nla_get_u8(pg_tb[i]);
 844
 845                 /* dir: Tx = 0, Rx = 1 */
 846                 if (dir) {
 847                         /* Rx */
 848                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
 849                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 850                 } else {
 851                         /* Tx */
 852                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
 853                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 854                 }
 855         }
 856
 857         return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
 858 }
 859
 860 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 861                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 862 {
 863         return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
 864 }
 865
 866 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 867                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 868 {
 869         return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
 870 }
 871
 872 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 873                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
 874 {
 875         struct nlattr *bcn_nest;
 876         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
 877         u8 value_byte;
 878         u32 value_integer;
 879         int ret;
 880         bool getall = false;
 881         int i;
 882
 883         if (!tb[DCB_ATTR_BCN])
 884                 return -EINVAL;
 885
 886         if (!netdev->dcbnl_ops->getbcnrp ||
 887             !netdev->dcbnl_ops->getbcncfg)
 888                 return -EOPNOTSUPP;
 889
 890         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX, tb[DCB_ATTR_BCN],
 891                                dcbnl_bcn_nest, NULL);
 892         if (ret)
 893                 return ret;
 894
 895         bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
 896         if (!bcn_nest)
 897                 return -EMSGSIZE;
 898
 899         if (bcn_tb[DCB_BCN_ATTR_ALL])
 900                 getall = true;
 901
 902         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 903                 if (!getall && !bcn_tb[i])
 904                         continue;
 905
 906                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
 907                                             &value_byte);
 908                 ret = nla_put_u8(skb, i, value_byte);
 909                 if (ret)
 910                         goto err_bcn;
 911         }
 912
 913         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
 914                 if (!getall && !bcn_tb[i])
 915                         continue;
 916
 917                 netdev->dcbnl_ops->getbcncfg(netdev, i,
 918                                              &value_integer);
 919                 ret = nla_put_u32(skb, i, value_integer);
 920                 if (ret)
 921                         goto err_bcn;
 922         }
 923
 924         nla_nest_end(skb, bcn_nest);
 925
 926         return 0;
 927
 928 err_bcn:
 929         nla_nest_cancel(skb, bcn_nest);
 930         return ret;
 931 }
 932
 933 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 934                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
 935 {
 936         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
 937         int i;
 938         int ret;
 939         u8 value_byte;
 940         u32 value_int;
 941
 942         if (!tb[DCB_ATTR_BCN])
 943                 return -EINVAL;
 944
 945         if (!netdev->dcbnl_ops->setbcncfg ||
 946             !netdev->dcbnl_ops->setbcnrp)
 947                 return -EOPNOTSUPP;
 948
 949         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX, tb[DCB_ATTR_BCN],
 950                                dcbnl_pfc_up_nest, NULL);
 951         if (ret)
 952                 return ret;
 953
 954         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 955                 if (data[i] == NULL)
 956                         continue;
 957                 value_byte = nla_get_u8(data[i]);
 958                 netdev->dcbnl_ops->setbcnrp(netdev,
 959                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
 960         }
 961
 962         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
 963                 if (data[i] == NULL)
 964                         continue;
 965                 value_int = nla_get_u32(data[i]);
 966                 netdev->dcbnl_ops->setbcncfg(netdev,
 967                                              i, value_int);
 968         }
 969
 970         return nla_put_u8(skb, DCB_ATTR_BCN, 0);
 971 }
 972
 973 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
 974                                 int app_nested_type, int app_info_type,
 975                                 int app_entry_type)
 976 {
 977         struct dcb_peer_app_info info;
 978         struct dcb_app *table = NULL;
 979         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
 980         u16 app_count;
 981         int err;
 982
 983
 984         /**
 985          * retrieve the peer app configuration form the driver. If the driver
 986          * handlers fail exit without doing anything
 987          */
 988         err = ops->peer_getappinfo(netdev, &info, &app_count);
 989         if (!err && app_count) {
 990                 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
 991                 if (!table)
 992                         return -ENOMEM;
 993
 994                 err = ops->peer_getapptable(netdev, table);
 995         }
 996
 997         if (!err) {
 998                 u16 i;
 999                 struct nlattr *app;
1000
1001                 /**
1002                  * build the message, from here on the only possible failure
1003                  * is due to the skb size
1004                  */
1005                 err = -EMSGSIZE;
1006
1007                 app = nla_nest_start(skb, app_nested_type);
1008                 if (!app)
1009                         goto nla_put_failure;
1010
1011                 if (app_info_type &&
1012                     nla_put(skb, app_info_type, sizeof(info), &info))
1013                         goto nla_put_failure;
1014
1015                 for (i = 0; i < app_count; i++) {
1016                         if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1017                                     &table[i]))
1018                                 goto nla_put_failure;
1019                 }
1020                 nla_nest_end(skb, app);
1021         }
1022         err = 0;
1023
1024 nla_put_failure:
1025         kfree(table);
1026         return err;
1027 }
1028
1029 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */
1030 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1031 {
1032         struct nlattr *ieee, *app;
1033         struct dcb_app_type *itr;
1034         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1035         int dcbx;
1036         int err;
1037
1038         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1039                 return -EMSGSIZE;
1040
1041         ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1042         if (!ieee)
1043                 return -EMSGSIZE;
1044
1045         if (ops->ieee_getets) {
1046                 struct ieee_ets ets;
1047                 memset(&ets, 0, sizeof(ets));
1048                 err = ops->ieee_getets(netdev, &ets);
1049                 if (!err &&
1050                     nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1051                         return -EMSGSIZE;
1052         }
1053
1054         if (ops->ieee_getmaxrate) {
1055                 struct ieee_maxrate maxrate;
1056                 memset(&maxrate, 0, sizeof(maxrate));
1057                 err = ops->ieee_getmaxrate(netdev, &maxrate);
1058                 if (!err) {
1059                         err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1060                                       sizeof(maxrate), &maxrate);
1061                         if (err)
1062                                 return -EMSGSIZE;
1063                 }
1064         }
1065
1066         if (ops->ieee_getqcn) {
1067                 struct ieee_qcn qcn;
1068
1069                 memset(&qcn, 0, sizeof(qcn));
1070                 err = ops->ieee_getqcn(netdev, &qcn);
1071                 if (!err) {
1072                         err = nla_put(skb, DCB_ATTR_IEEE_QCN,
1073                                       sizeof(qcn), &qcn);
1074                         if (err)
1075                                 return -EMSGSIZE;
1076                 }
1077         }
1078
1079         if (ops->ieee_getqcnstats) {
1080                 struct ieee_qcn_stats qcn_stats;
1081
1082                 memset(&qcn_stats, 0, sizeof(qcn_stats));
1083                 err = ops->ieee_getqcnstats(netdev, &qcn_stats);
1084                 if (!err) {
1085                         err = nla_put(skb, DCB_ATTR_IEEE_QCN_STATS,
1086                                       sizeof(qcn_stats), &qcn_stats);
1087                         if (err)
1088                                 return -EMSGSIZE;
1089                 }
1090         }
1091
1092         if (ops->ieee_getpfc) {
1093                 struct ieee_pfc pfc;
1094                 memset(&pfc, 0, sizeof(pfc));
1095                 err = ops->ieee_getpfc(netdev, &pfc);
1096                 if (!err &&
1097                     nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1098                         return -EMSGSIZE;
1099         }
1100
1101         app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1102         if (!app)
1103                 return -EMSGSIZE;
1104
1105         spin_lock_bh(&dcb_lock);
1106         list_for_each_entry(itr, &dcb_app_list, list) {
1107                 if (itr->ifindex == netdev->ifindex) {
1108                         err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1109                                          &itr->app);
1110                         if (err) {
1111                                 spin_unlock_bh(&dcb_lock);
1112                                 return -EMSGSIZE;
1113                         }
1114                 }
1115         }
1116
1117         if (netdev->dcbnl_ops->getdcbx)
1118                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1119         else
1120                 dcbx = -EOPNOTSUPP;
1121
1122         spin_unlock_bh(&dcb_lock);
1123         nla_nest_end(skb, app);
1124
1125         /* get peer info if available */
1126         if (ops->ieee_peer_getets) {
1127                 struct ieee_ets ets;
1128                 memset(&ets, 0, sizeof(ets));
1129                 err = ops->ieee_peer_getets(netdev, &ets);
1130                 if (!err &&
1131                     nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1132                         return -EMSGSIZE;
1133         }
1134
1135         if (ops->ieee_peer_getpfc) {
1136                 struct ieee_pfc pfc;
1137                 memset(&pfc, 0, sizeof(pfc));
1138                 err = ops->ieee_peer_getpfc(netdev, &pfc);
1139                 if (!err &&
1140                     nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1141                         return -EMSGSIZE;
1142         }
1143
1144         if (ops->peer_getappinfo && ops->peer_getapptable) {
1145                 err = dcbnl_build_peer_app(netdev, skb,
1146                                            DCB_ATTR_IEEE_PEER_APP,
1147                                            DCB_ATTR_IEEE_APP_UNSPEC,
1148                                            DCB_ATTR_IEEE_APP);
1149                 if (err)
1150                         return -EMSGSIZE;
1151         }
1152
1153         nla_nest_end(skb, ieee);
1154         if (dcbx >= 0) {
1155                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1156                 if (err)
1157                         return -EMSGSIZE;
1158         }
1159
1160         return 0;
1161 }
1162
1163 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1164                              int dir)
1165 {
1166         u8 pgid, up_map, prio, tc_pct;
1167         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1168         int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1169         struct nlattr *pg = nla_nest_start(skb, i);
1170
1171         if (!pg)
1172                 return -EMSGSIZE;
1173
1174         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1175                 struct nlattr *tc_nest = nla_nest_start(skb, i);
1176
1177                 if (!tc_nest)
1178                         return -EMSGSIZE;
1179
1180                 pgid = DCB_ATTR_VALUE_UNDEFINED;
1181                 prio = DCB_ATTR_VALUE_UNDEFINED;
1182                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1183                 up_map = DCB_ATTR_VALUE_UNDEFINED;
1184
1185                 if (!dir)
1186                         ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1187                                           &prio, &pgid, &tc_pct, &up_map);
1188                 else
1189                         ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1190                                           &prio, &pgid, &tc_pct, &up_map);
1191
1192                 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1193                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1194                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1195                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1196                         return -EMSGSIZE;
1197                 nla_nest_end(skb, tc_nest);
1198         }
1199
1200         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1201                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1202
1203                 if (!dir)
1204                         ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1205                                            &tc_pct);
1206                 else
1207                         ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1208                                            &tc_pct);
1209                 if (nla_put_u8(skb, i, tc_pct))
1210                         return -EMSGSIZE;
1211         }
1212         nla_nest_end(skb, pg);
1213         return 0;
1214 }
1215
1216 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1217 {
1218         struct nlattr *cee, *app;
1219         struct dcb_app_type *itr;
1220         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1221         int dcbx, i, err = -EMSGSIZE;
1222         u8 value;
1223
1224         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1225                 goto nla_put_failure;
1226         cee = nla_nest_start(skb, DCB_ATTR_CEE);
1227         if (!cee)
1228                 goto nla_put_failure;
1229
1230         /* local pg */
1231         if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1232                 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1233                 if (err)
1234                         goto nla_put_failure;
1235         }
1236
1237         if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1238                 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1239                 if (err)
1240                         goto nla_put_failure;
1241         }
1242
1243         /* local pfc */
1244         if (ops->getpfccfg) {
1245                 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1246
1247                 if (!pfc_nest)
1248                         goto nla_put_failure;
1249
1250                 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1251                         ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1252                         if (nla_put_u8(skb, i, value))
1253                                 goto nla_put_failure;
1254                 }
1255                 nla_nest_end(skb, pfc_nest);
1256         }
1257
1258         /* local app */
1259         spin_lock_bh(&dcb_lock);
1260         app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1261         if (!app)
1262                 goto dcb_unlock;
1263
1264         list_for_each_entry(itr, &dcb_app_list, list) {
1265                 if (itr->ifindex == netdev->ifindex) {
1266                         struct nlattr *app_nest = nla_nest_start(skb,
1267                                                                  DCB_ATTR_APP);
1268                         if (!app_nest)
1269                                 goto dcb_unlock;
1270
1271                         err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1272                                          itr->app.selector);
1273                         if (err)
1274                                 goto dcb_unlock;
1275
1276                         err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1277                                           itr->app.protocol);
1278                         if (err)
1279                                 goto dcb_unlock;
1280
1281                         err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1282                                          itr->app.priority);
1283                         if (err)
1284                                 goto dcb_unlock;
1285
1286                         nla_nest_end(skb, app_nest);
1287                 }
1288         }
1289         nla_nest_end(skb, app);
1290
1291         if (netdev->dcbnl_ops->getdcbx)
1292                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1293         else
1294                 dcbx = -EOPNOTSUPP;
1295
1296         spin_unlock_bh(&dcb_lock);
1297
1298         /* features flags */
1299         if (ops->getfeatcfg) {
1300                 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1301                 if (!feat)
1302                         goto nla_put_failure;
1303
1304                 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1305                      i++)
1306                         if (!ops->getfeatcfg(netdev, i, &value) &&
1307                             nla_put_u8(skb, i, value))
1308                                 goto nla_put_failure;
1309
1310                 nla_nest_end(skb, feat);
1311         }
1312
1313         /* peer info if available */
1314         if (ops->cee_peer_getpg) {
1315                 struct cee_pg pg;
1316                 memset(&pg, 0, sizeof(pg));
1317                 err = ops->cee_peer_getpg(netdev, &pg);
1318                 if (!err &&
1319                     nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1320                         goto nla_put_failure;
1321         }
1322
1323         if (ops->cee_peer_getpfc) {
1324                 struct cee_pfc pfc;
1325                 memset(&pfc, 0, sizeof(pfc));
1326                 err = ops->cee_peer_getpfc(netdev, &pfc);
1327                 if (!err &&
1328                     nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1329                         goto nla_put_failure;
1330         }
1331
1332         if (ops->peer_getappinfo && ops->peer_getapptable) {
1333                 err = dcbnl_build_peer_app(netdev, skb,
1334                                            DCB_ATTR_CEE_PEER_APP_TABLE,
1335                                            DCB_ATTR_CEE_PEER_APP_INFO,
1336                                            DCB_ATTR_CEE_PEER_APP);
1337                 if (err)
1338                         goto nla_put_failure;
1339         }
1340         nla_nest_end(skb, cee);
1341
1342         /* DCBX state */
1343         if (dcbx >= 0) {
1344                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1345                 if (err)
1346                         goto nla_put_failure;
1347         }
1348         return 0;
1349
1350 dcb_unlock:
1351         spin_unlock_bh(&dcb_lock);
1352 nla_put_failure:
1353         err = -EMSGSIZE;
1354         return err;
1355 }
1356
1357 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1358                         u32 seq, u32 portid, int dcbx_ver)
1359 {
1360         struct net *net = dev_net(dev);
1361         struct sk_buff *skb;
1362         struct nlmsghdr *nlh;
1363         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1364         int err;
1365
1366         if (!ops)
1367                 return -EOPNOTSUPP;
1368
1369         skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1370         if (!skb)
1371                 return -ENOBUFS;
1372
1373         if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1374                 err = dcbnl_ieee_fill(skb, dev);
1375         else
1376                 err = dcbnl_cee_fill(skb, dev);
1377
1378         if (err < 0) {
1379                 /* Report error to broadcast listeners */
1380                 nlmsg_free(skb);
1381                 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1382         } else {
1383                 /* End nlmsg and notify broadcast listeners */
1384                 nlmsg_end(skb, nlh);
1385                 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1386         }
1387
1388         return err;
1389 }
1390
1391 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1392                       u32 seq, u32 portid)
1393 {
1394         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1395 }
1396 EXPORT_SYMBOL(dcbnl_ieee_notify);
1397
1398 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1399                      u32 seq, u32 portid)
1400 {
1401         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1402 }
1403 EXPORT_SYMBOL(dcbnl_cee_notify);
1404
1405 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb SET commands.
1406  * If any requested operation can not be completed
1407  * the entire msg is aborted and error value is returned.
1408  * No attempt is made to reconcile the case where only part of the
1409  * cmd can be completed.
1410  */
1411 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1412                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1413 {
1414         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1415         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1416         int err;
1417
1418         if (!ops)
1419                 return -EOPNOTSUPP;
1420
1421         if (!tb[DCB_ATTR_IEEE])
1422                 return -EINVAL;
1423
1424         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX, tb[DCB_ATTR_IEEE],
1425                                dcbnl_ieee_policy, NULL);
1426         if (err)
1427                 return err;
1428
1429         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1430                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1431                 err = ops->ieee_setets(netdev, ets);
1432                 if (err)
1433                         goto err;
1434         }
1435
1436         if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1437                 struct ieee_maxrate *maxrate =
1438                         nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1439                 err = ops->ieee_setmaxrate(netdev, maxrate);
1440                 if (err)
1441                         goto err;
1442         }
1443
1444         if (ieee[DCB_ATTR_IEEE_QCN] && ops->ieee_setqcn) {
1445                 struct ieee_qcn *qcn =
1446                         nla_data(ieee[DCB_ATTR_IEEE_QCN]);
1447
1448                 err = ops->ieee_setqcn(netdev, qcn);
1449                 if (err)
1450                         goto err;
1451         }
1452
1453         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1454                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1455                 err = ops->ieee_setpfc(netdev, pfc);
1456                 if (err)
1457                         goto err;
1458         }
1459
1460         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1461                 struct nlattr *attr;
1462                 int rem;
1463
1464                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1465                         struct dcb_app *app_data;
1466                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1467                                 continue;
1468                         app_data = nla_data(attr);
1469                         if (ops->ieee_setapp)
1470                                 err = ops->ieee_setapp(netdev, app_data);
1471                         else
1472                                 err = dcb_ieee_setapp(netdev, app_data);
1473                         if (err)
1474                                 goto err;
1475                 }
1476         }
1477
1478 err:
1479         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1480         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1481         return err;
1482 }
1483
1484 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1485                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1486 {
1487         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1488
1489         if (!ops)
1490                 return -EOPNOTSUPP;
1491
1492         return dcbnl_ieee_fill(skb, netdev);
1493 }
1494
1495 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1496                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1497 {
1498         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1499         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1500         int err;
1501
1502         if (!ops)
1503                 return -EOPNOTSUPP;
1504
1505         if (!tb[DCB_ATTR_IEEE])
1506                 return -EINVAL;
1507
1508         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX, tb[DCB_ATTR_IEEE],
1509                                dcbnl_ieee_policy, NULL);
1510         if (err)
1511                 return err;
1512
1513         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1514                 struct nlattr *attr;
1515                 int rem;
1516
1517                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1518                         struct dcb_app *app_data;
1519
1520                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1521                                 continue;
1522                         app_data = nla_data(attr);
1523                         if (ops->ieee_delapp)
1524                                 err = ops->ieee_delapp(netdev, app_data);
1525                         else
1526                                 err = dcb_ieee_delapp(netdev, app_data);
1527                         if (err)
1528                                 goto err;
1529                 }
1530         }
1531
1532 err:
1533         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1534         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1535         return err;
1536 }
1537
1538
1539 /* DCBX configuration */
1540 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1541                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1542 {
1543         if (!netdev->dcbnl_ops->getdcbx)
1544                 return -EOPNOTSUPP;
1545
1546         return nla_put_u8(skb, DCB_ATTR_DCBX,
1547                           netdev->dcbnl_ops->getdcbx(netdev));
1548 }
1549
1550 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1551                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1552 {
1553         u8 value;
1554
1555         if (!netdev->dcbnl_ops->setdcbx)
1556                 return -EOPNOTSUPP;
1557
1558         if (!tb[DCB_ATTR_DCBX])
1559                 return -EINVAL;
1560
1561         value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1562
1563         return nla_put_u8(skb, DCB_ATTR_DCBX,
1564                           netdev->dcbnl_ops->setdcbx(netdev, value));
1565 }
1566
1567 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1568                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1569 {
1570         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1571         u8 value;
1572         int ret, i;
1573         int getall = 0;
1574
1575         if (!netdev->dcbnl_ops->getfeatcfg)
1576                 return -EOPNOTSUPP;
1577
1578         if (!tb[DCB_ATTR_FEATCFG])
1579                 return -EINVAL;
1580
1581         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX,
1582                                tb[DCB_ATTR_FEATCFG], dcbnl_featcfg_nest, NULL);
1583         if (ret)
1584                 return ret;
1585
1586         nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1587         if (!nest)
1588                 return -EMSGSIZE;
1589
1590         if (data[DCB_FEATCFG_ATTR_ALL])
1591                 getall = 1;
1592
1593         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1594                 if (!getall && !data[i])
1595                         continue;
1596
1597                 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1598                 if (!ret)
1599                         ret = nla_put_u8(skb, i, value);
1600
1601                 if (ret) {
1602                         nla_nest_cancel(skb, nest);
1603                         goto nla_put_failure;
1604                 }
1605         }
1606         nla_nest_end(skb, nest);
1607
1608 nla_put_failure:
1609         return ret;
1610 }
1611
1612 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1613                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1614 {
1615         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1616         int ret, i;
1617         u8 value;
1618
1619         if (!netdev->dcbnl_ops->setfeatcfg)
1620                 return -ENOTSUPP;
1621
1622         if (!tb[DCB_ATTR_FEATCFG])
1623                 return -EINVAL;
1624
1625         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX,
1626                                tb[DCB_ATTR_FEATCFG], dcbnl_featcfg_nest, NULL);
1627
1628         if (ret)
1629                 goto err;
1630
1631         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1632                 if (data[i] == NULL)
1633                         continue;
1634
1635                 value = nla_get_u8(data[i]);
1636
1637                 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1638
1639                 if (ret)
1640                         goto err;
1641         }
1642 err:
1643         ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1644
1645         return ret;
1646 }
1647
1648 /* Handle CEE DCBX GET commands. */
1649 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1650                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1651 {
1652         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1653
1654         if (!ops)
1655                 return -EOPNOTSUPP;
1656
1657         return dcbnl_cee_fill(skb, netdev);
1658 }
1659
1660 struct reply_func {
1661         /* reply netlink message type */
1662         int     type;
1663
1664         /* function to fill message contents */
1665         int   (*cb)(struct net_device *, struct nlmsghdr *, u32,
1666                     struct nlattr **, struct sk_buff *);
1667 };
1668
1669 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1670         [DCB_CMD_GSTATE]        = { RTM_GETDCB, dcbnl_getstate },
1671         [DCB_CMD_SSTATE]        = { RTM_SETDCB, dcbnl_setstate },
1672         [DCB_CMD_PFC_GCFG]      = { RTM_GETDCB, dcbnl_getpfccfg },
1673         [DCB_CMD_PFC_SCFG]      = { RTM_SETDCB, dcbnl_setpfccfg },
1674         [DCB_CMD_GPERM_HWADDR]  = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1675         [DCB_CMD_GCAP]          = { RTM_GETDCB, dcbnl_getcap },
1676         [DCB_CMD_GNUMTCS]       = { RTM_GETDCB, dcbnl_getnumtcs },
1677         [DCB_CMD_SNUMTCS]       = { RTM_SETDCB, dcbnl_setnumtcs },
1678         [DCB_CMD_PFC_GSTATE]    = { RTM_GETDCB, dcbnl_getpfcstate },
1679         [DCB_CMD_PFC_SSTATE]    = { RTM_SETDCB, dcbnl_setpfcstate },
1680         [DCB_CMD_GAPP]          = { RTM_GETDCB, dcbnl_getapp },
1681         [DCB_CMD_SAPP]          = { RTM_SETDCB, dcbnl_setapp },
1682         [DCB_CMD_PGTX_GCFG]     = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1683         [DCB_CMD_PGTX_SCFG]     = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1684         [DCB_CMD_PGRX_GCFG]     = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1685         [DCB_CMD_PGRX_SCFG]     = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1686         [DCB_CMD_SET_ALL]       = { RTM_SETDCB, dcbnl_setall },
1687         [DCB_CMD_BCN_GCFG]      = { RTM_GETDCB, dcbnl_bcn_getcfg },
1688         [DCB_CMD_BCN_SCFG]      = { RTM_SETDCB, dcbnl_bcn_setcfg },
1689         [DCB_CMD_IEEE_GET]      = { RTM_GETDCB, dcbnl_ieee_get },
1690         [DCB_CMD_IEEE_SET]      = { RTM_SETDCB, dcbnl_ieee_set },
1691         [DCB_CMD_IEEE_DEL]      = { RTM_SETDCB, dcbnl_ieee_del },
1692         [DCB_CMD_GDCBX]         = { RTM_GETDCB, dcbnl_getdcbx },
1693         [DCB_CMD_SDCBX]         = { RTM_SETDCB, dcbnl_setdcbx },
1694         [DCB_CMD_GFEATCFG]      = { RTM_GETDCB, dcbnl_getfeatcfg },
1695         [DCB_CMD_SFEATCFG]      = { RTM_SETDCB, dcbnl_setfeatcfg },
1696         [DCB_CMD_CEE_GET]       = { RTM_GETDCB, dcbnl_cee_get },
1697 };
1698
1699 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1700                     struct netlink_ext_ack *extack)
1701 {
1702         struct net *net = sock_net(skb->sk);
1703         struct net_device *netdev;
1704         struct dcbmsg *dcb = nlmsg_data(nlh);
1705         struct nlattr *tb[DCB_ATTR_MAX + 1];
1706         u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1707         int ret = -EINVAL;
1708         struct sk_buff *reply_skb;
1709         struct nlmsghdr *reply_nlh = NULL;
1710         const struct reply_func *fn;
1711
1712         if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
1713                 return -EPERM;
1714
1715         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1716                           dcbnl_rtnl_policy, extack);
1717         if (ret < 0)
1718                 return ret;
1719
1720         if (dcb->cmd > DCB_CMD_MAX)
1721                 return -EINVAL;
1722
1723         /* check if a reply function has been defined for the command */
1724         fn = &reply_funcs[dcb->cmd];
1725         if (!fn->cb)
1726                 return -EOPNOTSUPP;
1727
1728         if (!tb[DCB_ATTR_IFNAME])
1729                 return -EINVAL;
1730
1731         netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1732         if (!netdev)
1733                 return -ENODEV;
1734
1735         if (!netdev->dcbnl_ops)
1736                 return -EOPNOTSUPP;
1737
1738         reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1739                                  nlh->nlmsg_flags, &reply_nlh);
1740         if (!reply_skb)
1741                 return -ENOBUFS;
1742
1743         ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1744         if (ret < 0) {
1745                 nlmsg_free(reply_skb);
1746                 goto out;
1747         }
1748
1749         nlmsg_end(reply_skb, reply_nlh);
1750
1751         ret = rtnl_unicast(reply_skb, net, portid);
1752 out:
1753         return ret;
1754 }
1755
1756 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1757                                            int ifindex, int prio)
1758 {
1759         struct dcb_app_type *itr;
1760
1761         list_for_each_entry(itr, &dcb_app_list, list) {
1762                 if (itr->app.selector == app->selector &&
1763                     itr->app.protocol == app->protocol &&
1764                     itr->ifindex == ifindex &&
1765                     (!prio || itr->app.priority == prio))
1766                         return itr;
1767         }
1768
1769         return NULL;
1770 }
1771
1772 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1773 {
1774         struct dcb_app_type *entry;
1775
1776         entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1777         if (!entry)
1778                 return -ENOMEM;
1779
1780         memcpy(&entry->app, app, sizeof(*app));
1781         entry->ifindex = ifindex;
1782         list_add(&entry->list, &dcb_app_list);
1783
1784         return 0;
1785 }
1786
1787 /**
1788  * dcb_getapp - retrieve the DCBX application user priority
1789  *
1790  * On success returns a non-zero 802.1p user priority bitmap
1791  * otherwise returns 0 as the invalid user priority bitmap to
1792  * indicate an error.
1793  */
1794 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1795 {
1796         struct dcb_app_type *itr;
1797         u8 prio = 0;
1798
1799         spin_lock_bh(&dcb_lock);
1800         if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1801                 prio = itr->app.priority;
1802         spin_unlock_bh(&dcb_lock);
1803
1804         return prio;
1805 }
1806 EXPORT_SYMBOL(dcb_getapp);
1807
1808 /**
1809  * dcb_setapp - add CEE dcb application data to app list
1810  *
1811  * Priority 0 is an invalid priority in CEE spec. This routine
1812  * removes applications from the app list if the priority is
1813  * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap
1814  */
1815 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1816 {
1817         struct dcb_app_type *itr;
1818         struct dcb_app_type event;
1819         int err = 0;
1820
1821         event.ifindex = dev->ifindex;
1822         memcpy(&event.app, new, sizeof(event.app));
1823         if (dev->dcbnl_ops->getdcbx)
1824                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1825
1826         spin_lock_bh(&dcb_lock);
1827         /* Search for existing match and replace */
1828         if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1829                 if (new->priority)
1830                         itr->app.priority = new->priority;
1831                 else {
1832                         list_del(&itr->list);
1833                         kfree(itr);
1834                 }
1835                 goto out;
1836         }
1837         /* App type does not exist add new application type */
1838         if (new->priority)
1839                 err = dcb_app_add(new, dev->ifindex);
1840 out:
1841         spin_unlock_bh(&dcb_lock);
1842         if (!err)
1843                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1844         return err;
1845 }
1846 EXPORT_SYMBOL(dcb_setapp);
1847
1848 /**
1849  * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1850  *
1851  * Helper routine which on success returns a non-zero 802.1Qaz user
1852  * priority bitmap otherwise returns 0 to indicate the dcb_app was
1853  * not found in APP list.
1854  */
1855 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1856 {
1857         struct dcb_app_type *itr;
1858         u8 prio = 0;
1859
1860         spin_lock_bh(&dcb_lock);
1861         if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1862                 prio |= 1 << itr->app.priority;
1863         spin_unlock_bh(&dcb_lock);
1864
1865         return prio;
1866 }
1867 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1868
1869 /**
1870  * dcb_ieee_setapp - add IEEE dcb application data to app list
1871  *
1872  * This adds Application data to the list. Multiple application
1873  * entries may exists for the same selector and protocol as long
1874  * as the priorities are different. Priority is expected to be a
1875  * 3-bit unsigned integer
1876  */
1877 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1878 {
1879         struct dcb_app_type event;
1880         int err = 0;
1881
1882         event.ifindex = dev->ifindex;
1883         memcpy(&event.app, new, sizeof(event.app));
1884         if (dev->dcbnl_ops->getdcbx)
1885                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1886
1887         spin_lock_bh(&dcb_lock);
1888         /* Search for existing match and abort if found */
1889         if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1890                 err = -EEXIST;
1891                 goto out;
1892         }
1893
1894         err = dcb_app_add(new, dev->ifindex);
1895 out:
1896         spin_unlock_bh(&dcb_lock);
1897         if (!err)
1898                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1899         return err;
1900 }
1901 EXPORT_SYMBOL(dcb_ieee_setapp);
1902
1903 /**
1904  * dcb_ieee_delapp - delete IEEE dcb application data from list
1905  *
1906  * This removes a matching APP data from the APP list
1907  */
1908 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1909 {
1910         struct dcb_app_type *itr;
1911         struct dcb_app_type event;
1912         int err = -ENOENT;
1913
1914         event.ifindex = dev->ifindex;
1915         memcpy(&event.app, del, sizeof(event.app));
1916         if (dev->dcbnl_ops->getdcbx)
1917                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1918
1919         spin_lock_bh(&dcb_lock);
1920         /* Search for existing match and remove it. */
1921         if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1922                 list_del(&itr->list);
1923                 kfree(itr);
1924                 err = 0;
1925         }
1926
1927         spin_unlock_bh(&dcb_lock);
1928         if (!err)
1929                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1930         return err;
1931 }
1932 EXPORT_SYMBOL(dcb_ieee_delapp);
1933
1934 static int __init dcbnl_init(void)
1935 {
1936         INIT_LIST_HEAD(&dcb_app_list);
1937
1938         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1939         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1940
1941         return 0;
1942 }
1943 device_initcall(dcbnl_init);