kernel/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  * Author: Lucy Liu <lucy.liu@intel.com>
  17  */
  18
  19 #include <linux/netdevice.h>
  20 #include <linux/netlink.h>
  21 #include <linux/slab.h>
  22 #include <net/netlink.h>
  23 #include <net/rtnetlink.h>
  24 #include <linux/dcbnl.h>
  25 #include <net/dcbevent.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/module.h>
  28 #include <net/sock.h>
  29
  30 /* Data Center Bridging (DCB) is a collection of Ethernet enhancements
  31  * intended to allow network traffic with differing requirements
  32  * (highly reliable, no drops vs. best effort vs. low latency) to operate
  33  * and co-exist on Ethernet.  Current DCB features are:
  34  *
  35  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
  36  *   framework for assigning bandwidth guarantees to traffic classes.
  37  *
  38  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
  39  *   can work independently for each 802.1p priority.
  40  *
  41  * Congestion Notification - provides a mechanism for end-to-end congestion
  42  *   control for protocols which do not have built-in congestion management.
  43  *
  44  * More information about the emerging standards for these Ethernet features
  45  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
  46  *
  47  * This file implements an rtnetlink interface to allow configuration of DCB
  48  * features for capable devices.
  49  */
  50
  51 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
  52 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
  53 MODULE_LICENSE("GPL");
  54
  55 /**************** DCB attribute policies *************************************/
  56
  57 /* DCB netlink attributes policy */
  58 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
  59         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  60         [DCB_ATTR_STATE]       = {.type = NLA_U8},
  61         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  62         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  63         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
  64         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
  65         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  66         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  67         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
  68         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
  69         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
  70         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
  71         [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
  72 };
  73
  74 /* DCB priority flow control to User Priority nested attributes */
  75 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
  76         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  77         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  78         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  79         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  80         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  81         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  82         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  83         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  84         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  85 };
  86
  87 /* DCB priority grouping nested attributes */
  88 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
  89         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  90         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  91         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  92         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  93         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  94         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  95         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  96         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  97         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  98         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
  99         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
 100         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
 101         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
 102         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
 103         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
 104         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
 105         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
 106         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
 107 };
 108
 109 /* DCB traffic class nested attributes. */
 110 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
 111         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
 112         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
 113         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
 114         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
 115         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
 116 };
 117
 118 /* DCB capabilities nested attributes. */
 119 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
 120         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
 121         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
 122         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
 123         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
 124         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
 125         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
 126         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
 127         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
 128         [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
 129 };
 130
 131 /* DCB capabilities nested attributes. */
 132 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
 133         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
 134         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
 135         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
 136 };
 137
 138 /* DCB BCN nested attributes. */
 139 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
 140         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
 141         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
 142         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
 143         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
 144         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
 145         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
 146         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
 147         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
 148         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
 149         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
 150         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
 151         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
 152         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
 153         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
 154         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
 155         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
 156         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
 157         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
 158         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
 159         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
 160         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
 161         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
 162         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
 163         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
 164         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
 165 };
 166
 167 /* DCB APP nested attributes. */
 168 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
 169         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
 170         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
 171         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
 172 };
 173
 174 /* IEEE 802.1Qaz nested attributes. */
 175 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
 176         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
 177         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
 178         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
 179         [DCB_ATTR_IEEE_MAXRATE]   = {.len = sizeof(struct ieee_maxrate)},
 180         [DCB_ATTR_IEEE_QCN]         = {.len = sizeof(struct ieee_qcn)},
 181         [DCB_ATTR_IEEE_QCN_STATS]   = {.len = sizeof(struct ieee_qcn_stats)},
 182 };
 183
 184 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
 185         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
 186 };
 187
 188 /* DCB number of traffic classes nested attributes. */
 189 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
 190         [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
 191         [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
 192         [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
 193         [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
 194 };
 195
 196 static LIST_HEAD(dcb_app_list);
 197 static DEFINE_SPINLOCK(dcb_lock);
 198
 199 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
 200                                     u32 flags, struct nlmsghdr **nlhp)
 201 {
 202         struct sk_buff *skb;
 203         struct dcbmsg *dcb;
 204         struct nlmsghdr *nlh;
 205
 206         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 207         if (!skb)
 208                 return NULL;
 209
 210         nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
 211         BUG_ON(!nlh);
 212
 213         dcb = nlmsg_data(nlh);
 214         dcb->dcb_family = AF_UNSPEC;
 215         dcb->cmd = cmd;
 216         dcb->dcb_pad = 0;
 217
 218         if (nlhp)
 219                 *nlhp = nlh;
 220
 221         return skb;
 222 }
 223
 224 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
 225                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 226 {
 227         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
 228         if (!netdev->dcbnl_ops->getstate)
 229                 return -EOPNOTSUPP;
 230
 231         return nla_put_u8(skb, DCB_ATTR_STATE,
 232                           netdev->dcbnl_ops->getstate(netdev));
 233 }
 234
 235 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 236                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 237 {
 238         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
 239         u8 value;
 240         int ret;
 241         int i;
 242         int getall = 0;
 243
 244         if (!tb[DCB_ATTR_PFC_CFG])
 245                 return -EINVAL;
 246
 247         if (!netdev->dcbnl_ops->getpfccfg)
 248                 return -EOPNOTSUPP;
 249
 250         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 251                                tb[DCB_ATTR_PFC_CFG],
 252                                dcbnl_pfc_up_nest);
 253         if (ret)
 254                 return ret;
 255
 256         nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
 257         if (!nest)
 258                 return -EMSGSIZE;
 259
 260         if (data[DCB_PFC_UP_ATTR_ALL])
 261                 getall = 1;
 262
 263         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 264                 if (!getall && !data[i])
 265                         continue;
 266
 267                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
 268                                              &value);
 269                 ret = nla_put_u8(skb, i, value);
 270                 if (ret) {
 271                         nla_nest_cancel(skb, nest);
 272                         return ret;
 273                 }
 274         }
 275         nla_nest_end(skb, nest);
 276
 277         return 0;
 278 }
 279
 280 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
 281                                 u32 seq, struct nlattr **tb, struct sk_buff *skb)
 282 {
 283         u8 perm_addr[MAX_ADDR_LEN];
 284
 285         if (!netdev->dcbnl_ops->getpermhwaddr)
 286                 return -EOPNOTSUPP;
 287
 288         memset(perm_addr, 0, sizeof(perm_addr));
 289         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
 290
 291         return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
 292 }
 293
 294 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
 295                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 296 {
 297         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
 298         u8 value;
 299         int ret;
 300         int i;
 301         int getall = 0;
 302
 303         if (!tb[DCB_ATTR_CAP])
 304                 return -EINVAL;
 305
 306         if (!netdev->dcbnl_ops->getcap)
 307                 return -EOPNOTSUPP;
 308
 309         ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
 310                                dcbnl_cap_nest);
 311         if (ret)
 312                 return ret;
 313
 314         nest = nla_nest_start(skb, DCB_ATTR_CAP);
 315         if (!nest)
 316                 return -EMSGSIZE;
 317
 318         if (data[DCB_CAP_ATTR_ALL])
 319                 getall = 1;
 320
 321         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
 322                 if (!getall && !data[i])
 323                         continue;
 324
 325                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
 326                         ret = nla_put_u8(skb, i, value);
 327                         if (ret) {
 328                                 nla_nest_cancel(skb, nest);
 329                                 return ret;
 330                         }
 331                 }
 332         }
 333         nla_nest_end(skb, nest);
 334
 335         return 0;
 336 }
 337
 338 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
 339                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 340 {
 341         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
 342         u8 value;
 343         int ret;
 344         int i;
 345         int getall = 0;
 346
 347         if (!tb[DCB_ATTR_NUMTCS])
 348                 return -EINVAL;
 349
 350         if (!netdev->dcbnl_ops->getnumtcs)
 351                 return -EOPNOTSUPP;
 352
 353         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 354                                dcbnl_numtcs_nest);
 355         if (ret)
 356                 return ret;
 357
 358         nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
 359         if (!nest)
 360                 return -EMSGSIZE;
 361
 362         if (data[DCB_NUMTCS_ATTR_ALL])
 363                 getall = 1;
 364
 365         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 366                 if (!getall && !data[i])
 367                         continue;
 368
 369                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
 370                 if (!ret) {
 371                         ret = nla_put_u8(skb, i, value);
 372                         if (ret) {
 373                                 nla_nest_cancel(skb, nest);
 374                                 return ret;
 375                         }
 376                 } else
 377                         return -EINVAL;
 378         }
 379         nla_nest_end(skb, nest);
 380
 381         return 0;
 382 }
 383
 384 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
 385                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 386 {
 387         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
 388         int ret;
 389         u8 value;
 390         int i;
 391
 392         if (!tb[DCB_ATTR_NUMTCS])
 393                 return -EINVAL;
 394
 395         if (!netdev->dcbnl_ops->setnumtcs)
 396                 return -EOPNOTSUPP;
 397
 398         ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
 399                                dcbnl_numtcs_nest);
 400         if (ret)
 401                 return ret;
 402
 403         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 404                 if (data[i] == NULL)
 405                         continue;
 406
 407                 value = nla_get_u8(data[i]);
 408
 409                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
 410                 if (ret)
 411                         break;
 412         }
 413
 414         return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
 415 }
 416
 417 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
 418                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 419 {
 420         if (!netdev->dcbnl_ops->getpfcstate)
 421                 return -EOPNOTSUPP;
 422
 423         return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
 424                           netdev->dcbnl_ops->getpfcstate(netdev));
 425 }
 426
 427 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
 428                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 429 {
 430         u8 value;
 431
 432         if (!tb[DCB_ATTR_PFC_STATE])
 433                 return -EINVAL;
 434
 435         if (!netdev->dcbnl_ops->setpfcstate)
 436                 return -EOPNOTSUPP;
 437
 438         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
 439
 440         netdev->dcbnl_ops->setpfcstate(netdev, value);
 441
 442         return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
 443 }
 444
 445 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
 446                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 447 {
 448         struct nlattr *app_nest;
 449         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 450         u16 id;
 451         u8 up, idtype;
 452         int ret;
 453
 454         if (!tb[DCB_ATTR_APP])
 455                 return -EINVAL;
 456
 457         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
 458                                dcbnl_app_nest);
 459         if (ret)
 460                 return ret;
 461
 462         /* all must be non-null */
 463         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 464             (!app_tb[DCB_APP_ATTR_ID]))
 465                 return -EINVAL;
 466
 467         /* either by eth type or by socket number */
 468         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 469         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 470             (idtype != DCB_APP_IDTYPE_PORTNUM))
 471                 return -EINVAL;
 472
 473         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 474
 475         if (netdev->dcbnl_ops->getapp) {
 476                 ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
 477                 if (ret < 0)
 478                         return ret;
 479                 else
 480                         up = ret;
 481         } else {
 482                 struct dcb_app app = {
 483                                         .selector = idtype,
 484                                         .protocol = id,
 485                                      };
 486                 up = dcb_getapp(netdev, &app);
 487         }
 488
 489         app_nest = nla_nest_start(skb, DCB_ATTR_APP);
 490         if (!app_nest)
 491                 return -EMSGSIZE;
 492
 493         ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
 494         if (ret)
 495                 goto out_cancel;
 496
 497         ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
 498         if (ret)
 499                 goto out_cancel;
 500
 501         ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
 502         if (ret)
 503                 goto out_cancel;
 504
 505         nla_nest_end(skb, app_nest);
 506
 507         return 0;
 508
 509 out_cancel:
 510         nla_nest_cancel(skb, app_nest);
 511         return ret;
 512 }
 513
 514 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
 515                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 516 {
 517         int ret;
 518         u16 id;
 519         u8 up, idtype;
 520         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 521
 522         if (!tb[DCB_ATTR_APP])
 523                 return -EINVAL;
 524
 525         ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
 526                                dcbnl_app_nest);
 527         if (ret)
 528                 return ret;
 529
 530         /* all must be non-null */
 531         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 532             (!app_tb[DCB_APP_ATTR_ID]) ||
 533             (!app_tb[DCB_APP_ATTR_PRIORITY]))
 534                 return -EINVAL;
 535
 536         /* either by eth type or by socket number */
 537         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 538         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 539             (idtype != DCB_APP_IDTYPE_PORTNUM))
 540                 return -EINVAL;
 541
 542         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 543         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
 544
 545         if (netdev->dcbnl_ops->setapp) {
 546                 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
 547                 if (ret < 0)
 548                         return ret;
 549         } else {
 550                 struct dcb_app app;
 551                 app.selector = idtype;
 552                 app.protocol = id;
 553                 app.priority = up;
 554                 ret = dcb_setapp(netdev, &app);
 555         }
 556
 557         ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
 558         dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
 559
 560         return ret;
 561 }
 562
 563 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 564                              struct nlattr **tb, struct sk_buff *skb, int dir)
 565 {
 566         struct nlattr *pg_nest, *param_nest, *data;
 567         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 568         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 569         u8 prio, pgid, tc_pct, up_map;
 570         int ret;
 571         int getall = 0;
 572         int i;
 573
 574         if (!tb[DCB_ATTR_PG_CFG])
 575                 return -EINVAL;
 576
 577         if (!netdev->dcbnl_ops->getpgtccfgtx ||
 578             !netdev->dcbnl_ops->getpgtccfgrx ||
 579             !netdev->dcbnl_ops->getpgbwgcfgtx ||
 580             !netdev->dcbnl_ops->getpgbwgcfgrx)
 581                 return -EOPNOTSUPP;
 582
 583         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
 584                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
 585         if (ret)
 586                 return ret;
 587
 588         pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
 589         if (!pg_nest)
 590                 return -EMSGSIZE;
 591
 592         if (pg_tb[DCB_PG_ATTR_TC_ALL])
 593                 getall = 1;
 594
 595         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 596                 if (!getall && !pg_tb[i])
 597                         continue;
 598
 599                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
 600                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
 601                 else
 602                         data = pg_tb[i];
 603                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 604                                        data, dcbnl_tc_param_nest);
 605                 if (ret)
 606                         goto err_pg;
 607
 608                 param_nest = nla_nest_start(skb, i);
 609                 if (!param_nest)
 610                         goto err_pg;
 611
 612                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 613                 prio = DCB_ATTR_VALUE_UNDEFINED;
 614                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 615                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 616
 617                 if (dir) {
 618                         /* Rx */
 619                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
 620                                                 i - DCB_PG_ATTR_TC_0, &prio,
 621                                                 &pgid, &tc_pct, &up_map);
 622                 } else {
 623                         /* Tx */
 624                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
 625                                                 i - DCB_PG_ATTR_TC_0, &prio,
 626                                                 &pgid, &tc_pct, &up_map);
 627                 }
 628
 629                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
 630                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 631                         ret = nla_put_u8(skb,
 632                                          DCB_TC_ATTR_PARAM_PGID, pgid);
 633                         if (ret)
 634                                 goto err_param;
 635                 }
 636                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
 637                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 638                         ret = nla_put_u8(skb,
 639                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
 640                         if (ret)
 641                                 goto err_param;
 642                 }
 643                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
 644                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 645                         ret = nla_put_u8(skb,
 646                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
 647                         if (ret)
 648                                 goto err_param;
 649                 }
 650                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
 651                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 652                         ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
 653                                          tc_pct);
 654                         if (ret)
 655                                 goto err_param;
 656                 }
 657                 nla_nest_end(skb, param_nest);
 658         }
 659
 660         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
 661                 getall = 1;
 662         else
 663                 getall = 0;
 664
 665         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 666                 if (!getall && !pg_tb[i])
 667                         continue;
 668
 669                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 670
 671                 if (dir) {
 672                         /* Rx */
 673                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
 674                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 675                 } else {
 676                         /* Tx */
 677                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
 678                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 679                 }
 680                 ret = nla_put_u8(skb, i, tc_pct);
 681                 if (ret)
 682                         goto err_pg;
 683         }
 684
 685         nla_nest_end(skb, pg_nest);
 686
 687         return 0;
 688
 689 err_param:
 690         nla_nest_cancel(skb, param_nest);
 691 err_pg:
 692         nla_nest_cancel(skb, pg_nest);
 693
 694         return -EMSGSIZE;
 695 }
 696
 697 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 698                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 699 {
 700         return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
 701 }
 702
 703 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 704                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 705 {
 706         return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
 707 }
 708
 709 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
 710                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 711 {
 712         u8 value;
 713
 714         if (!tb[DCB_ATTR_STATE])
 715                 return -EINVAL;
 716
 717         if (!netdev->dcbnl_ops->setstate)
 718                 return -EOPNOTSUPP;
 719
 720         value = nla_get_u8(tb[DCB_ATTR_STATE]);
 721
 722         return nla_put_u8(skb, DCB_ATTR_STATE,
 723                           netdev->dcbnl_ops->setstate(netdev, value));
 724 }
 725
 726 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 727                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 728 {
 729         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
 730         int i;
 731         int ret;
 732         u8 value;
 733
 734         if (!tb[DCB_ATTR_PFC_CFG])
 735                 return -EINVAL;
 736
 737         if (!netdev->dcbnl_ops->setpfccfg)
 738                 return -EOPNOTSUPP;
 739
 740         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 741                                tb[DCB_ATTR_PFC_CFG],
 742                                dcbnl_pfc_up_nest);
 743         if (ret)
 744                 return ret;
 745
 746         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 747                 if (data[i] == NULL)
 748                         continue;
 749                 value = nla_get_u8(data[i]);
 750                 netdev->dcbnl_ops->setpfccfg(netdev,
 751                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
 752         }
 753
 754         return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
 755 }
 756
 757 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
 758                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 759 {
 760         int ret;
 761
 762         if (!tb[DCB_ATTR_SET_ALL])
 763                 return -EINVAL;
 764
 765         if (!netdev->dcbnl_ops->setall)
 766                 return -EOPNOTSUPP;
 767
 768         ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
 769                          netdev->dcbnl_ops->setall(netdev));
 770         dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
 771
 772         return ret;
 773 }
 774
 775 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 776                              u32 seq, struct nlattr **tb, struct sk_buff *skb,
 777                              int dir)
 778 {
 779         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 780         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 781         int ret;
 782         int i;
 783         u8 pgid;
 784         u8 up_map;
 785         u8 prio;
 786         u8 tc_pct;
 787
 788         if (!tb[DCB_ATTR_PG_CFG])
 789                 return -EINVAL;
 790
 791         if (!netdev->dcbnl_ops->setpgtccfgtx ||
 792             !netdev->dcbnl_ops->setpgtccfgrx ||
 793             !netdev->dcbnl_ops->setpgbwgcfgtx ||
 794             !netdev->dcbnl_ops->setpgbwgcfgrx)
 795                 return -EOPNOTSUPP;
 796
 797         ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
 798                                tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
 799         if (ret)
 800                 return ret;
 801
 802         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 803                 if (!pg_tb[i])
 804                         continue;
 805
 806                 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
 807                                        pg_tb[i], dcbnl_tc_param_nest);
 808                 if (ret)
 809                         return ret;
 810
 811                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 812                 prio = DCB_ATTR_VALUE_UNDEFINED;
 813                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 814                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 815
 816                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
 817                         prio =
 818                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
 819
 820                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
 821                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
 822
 823                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
 824                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
 825
 826                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
 827                         up_map =
 828                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
 829
 830                 /* dir: Tx = 0, Rx = 1 */
 831                 if (dir) {
 832                         /* Rx */
 833                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
 834                                 i - DCB_PG_ATTR_TC_0,
 835                                 prio, pgid, tc_pct, up_map);
 836                 } else {
 837                         /* Tx */
 838                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
 839                                 i - DCB_PG_ATTR_TC_0,
 840                                 prio, pgid, tc_pct, up_map);
 841                 }
 842         }
 843
 844         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 845                 if (!pg_tb[i])
 846                         continue;
 847
 848                 tc_pct = nla_get_u8(pg_tb[i]);
 849
 850                 /* dir: Tx = 0, Rx = 1 */
 851                 if (dir) {
 852                         /* Rx */
 853                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
 854                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 855                 } else {
 856                         /* Tx */
 857                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
 858                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 859                 }
 860         }
 861
 862         return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
 863 }
 864
 865 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 866                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 867 {
 868         return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
 869 }
 870
 871 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 872                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 873 {
 874         return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
 875 }
 876
 877 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 878                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
 879 {
 880         struct nlattr *bcn_nest;
 881         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
 882         u8 value_byte;
 883         u32 value_integer;
 884         int ret;
 885         bool getall = false;
 886         int i;
 887
 888         if (!tb[DCB_ATTR_BCN])
 889                 return -EINVAL;
 890
 891         if (!netdev->dcbnl_ops->getbcnrp ||
 892             !netdev->dcbnl_ops->getbcncfg)
 893                 return -EOPNOTSUPP;
 894
 895         ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
 896                                tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
 897         if (ret)
 898                 return ret;
 899
 900         bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
 901         if (!bcn_nest)
 902                 return -EMSGSIZE;
 903
 904         if (bcn_tb[DCB_BCN_ATTR_ALL])
 905                 getall = true;
 906
 907         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 908                 if (!getall && !bcn_tb[i])
 909                         continue;
 910
 911                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
 912                                             &value_byte);
 913                 ret = nla_put_u8(skb, i, value_byte);
 914                 if (ret)
 915                         goto err_bcn;
 916         }
 917
 918         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
 919                 if (!getall && !bcn_tb[i])
 920                         continue;
 921
 922                 netdev->dcbnl_ops->getbcncfg(netdev, i,
 923                                              &value_integer);
 924                 ret = nla_put_u32(skb, i, value_integer);
 925                 if (ret)
 926                         goto err_bcn;
 927         }
 928
 929         nla_nest_end(skb, bcn_nest);
 930
 931         return 0;
 932
 933 err_bcn:
 934         nla_nest_cancel(skb, bcn_nest);
 935         return ret;
 936 }
 937
 938 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 939                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
 940 {
 941         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
 942         int i;
 943         int ret;
 944         u8 value_byte;
 945         u32 value_int;
 946
 947         if (!tb[DCB_ATTR_BCN])
 948                 return -EINVAL;
 949
 950         if (!netdev->dcbnl_ops->setbcncfg ||
 951             !netdev->dcbnl_ops->setbcnrp)
 952                 return -EOPNOTSUPP;
 953
 954         ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
 955                                tb[DCB_ATTR_BCN],
 956                                dcbnl_pfc_up_nest);
 957         if (ret)
 958                 return ret;
 959
 960         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 961                 if (data[i] == NULL)
 962                         continue;
 963                 value_byte = nla_get_u8(data[i]);
 964                 netdev->dcbnl_ops->setbcnrp(netdev,
 965                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
 966         }
 967
 968         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
 969                 if (data[i] == NULL)
 970                         continue;
 971                 value_int = nla_get_u32(data[i]);
 972                 netdev->dcbnl_ops->setbcncfg(netdev,
 973                                              i, value_int);
 974         }
 975
 976         return nla_put_u8(skb, DCB_ATTR_BCN, 0);
 977 }
 978
 979 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
 980                                 int app_nested_type, int app_info_type,
 981                                 int app_entry_type)
 982 {
 983         struct dcb_peer_app_info info;
 984         struct dcb_app *table = NULL;
 985         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
 986         u16 app_count;
 987         int err;
 988
 989
 990         /**
 991          * retrieve the peer app configuration form the driver. If the driver
 992          * handlers fail exit without doing anything
 993          */
 994         err = ops->peer_getappinfo(netdev, &info, &app_count);
 995         if (!err && app_count) {
 996                 table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
 997                 if (!table)
 998                         return -ENOMEM;
 999
1000                 err = ops->peer_getapptable(netdev, table);
1001         }
1002
1003         if (!err) {
1004                 u16 i;
1005                 struct nlattr *app;
1006
1007                 /**
1008                  * build the message, from here on the only possible failure
1009                  * is due to the skb size
1010                  */
1011                 err = -EMSGSIZE;
1012
1013                 app = nla_nest_start(skb, app_nested_type);
1014                 if (!app)
1015                         goto nla_put_failure;
1016
1017                 if (app_info_type &&
1018                     nla_put(skb, app_info_type, sizeof(info), &info))
1019                         goto nla_put_failure;
1020
1021                 for (i = 0; i < app_count; i++) {
1022                         if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1023                                     &table[i]))
1024                                 goto nla_put_failure;
1025                 }
1026                 nla_nest_end(skb, app);
1027         }
1028         err = 0;
1029
1030 nla_put_failure:
1031         kfree(table);
1032         return err;
1033 }
1034
1035 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */
1036 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1037 {
1038         struct nlattr *ieee, *app;
1039         struct dcb_app_type *itr;
1040         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1041         int dcbx;
1042         int err;
1043
1044         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1045                 return -EMSGSIZE;
1046
1047         ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
1048         if (!ieee)
1049                 return -EMSGSIZE;
1050
1051         if (ops->ieee_getets) {
1052                 struct ieee_ets ets;
1053                 memset(&ets, 0, sizeof(ets));
1054                 err = ops->ieee_getets(netdev, &ets);
1055                 if (!err &&
1056                     nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1057                         return -EMSGSIZE;
1058         }
1059
1060         if (ops->ieee_getmaxrate) {
1061                 struct ieee_maxrate maxrate;
1062                 memset(&maxrate, 0, sizeof(maxrate));
1063                 err = ops->ieee_getmaxrate(netdev, &maxrate);
1064                 if (!err) {
1065                         err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1066                                       sizeof(maxrate), &maxrate);
1067                         if (err)
1068                                 return -EMSGSIZE;
1069                 }
1070         }
1071
1072         if (ops->ieee_getqcn) {
1073                 struct ieee_qcn qcn;
1074
1075                 memset(&qcn, 0, sizeof(qcn));
1076                 err = ops->ieee_getqcn(netdev, &qcn);
1077                 if (!err) {
1078                         err = nla_put(skb, DCB_ATTR_IEEE_QCN,
1079                                       sizeof(qcn), &qcn);
1080                         if (err)
1081                                 return -EMSGSIZE;
1082                 }
1083         }
1084
1085         if (ops->ieee_getqcnstats) {
1086                 struct ieee_qcn_stats qcn_stats;
1087
1088                 memset(&qcn_stats, 0, sizeof(qcn_stats));
1089                 err = ops->ieee_getqcnstats(netdev, &qcn_stats);
1090                 if (!err) {
1091                         err = nla_put(skb, DCB_ATTR_IEEE_QCN_STATS,
1092                                       sizeof(qcn_stats), &qcn_stats);
1093                         if (err)
1094                                 return -EMSGSIZE;
1095                 }
1096         }
1097
1098         if (ops->ieee_getpfc) {
1099                 struct ieee_pfc pfc;
1100                 memset(&pfc, 0, sizeof(pfc));
1101                 err = ops->ieee_getpfc(netdev, &pfc);
1102                 if (!err &&
1103                     nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1104                         return -EMSGSIZE;
1105         }
1106
1107         app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1108         if (!app)
1109                 return -EMSGSIZE;
1110
1111         spin_lock_bh(&dcb_lock);
1112         list_for_each_entry(itr, &dcb_app_list, list) {
1113                 if (itr->ifindex == netdev->ifindex) {
1114                         err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1115                                          &itr->app);
1116                         if (err) {
1117                                 spin_unlock_bh(&dcb_lock);
1118                                 return -EMSGSIZE;
1119                         }
1120                 }
1121         }
1122
1123         if (netdev->dcbnl_ops->getdcbx)
1124                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1125         else
1126                 dcbx = -EOPNOTSUPP;
1127
1128         spin_unlock_bh(&dcb_lock);
1129         nla_nest_end(skb, app);
1130
1131         /* get peer info if available */
1132         if (ops->ieee_peer_getets) {
1133                 struct ieee_ets ets;
1134                 memset(&ets, 0, sizeof(ets));
1135                 err = ops->ieee_peer_getets(netdev, &ets);
1136                 if (!err &&
1137                     nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1138                         return -EMSGSIZE;
1139         }
1140
1141         if (ops->ieee_peer_getpfc) {
1142                 struct ieee_pfc pfc;
1143                 memset(&pfc, 0, sizeof(pfc));
1144                 err = ops->ieee_peer_getpfc(netdev, &pfc);
1145                 if (!err &&
1146                     nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1147                         return -EMSGSIZE;
1148         }
1149
1150         if (ops->peer_getappinfo && ops->peer_getapptable) {
1151                 err = dcbnl_build_peer_app(netdev, skb,
1152                                            DCB_ATTR_IEEE_PEER_APP,
1153                                            DCB_ATTR_IEEE_APP_UNSPEC,
1154                                            DCB_ATTR_IEEE_APP);
1155                 if (err)
1156                         return -EMSGSIZE;
1157         }
1158
1159         nla_nest_end(skb, ieee);
1160         if (dcbx >= 0) {
1161                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1162                 if (err)
1163                         return -EMSGSIZE;
1164         }
1165
1166         return 0;
1167 }
1168
1169 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1170                              int dir)
1171 {
1172         u8 pgid, up_map, prio, tc_pct;
1173         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1174         int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1175         struct nlattr *pg = nla_nest_start(skb, i);
1176
1177         if (!pg)
1178                 return -EMSGSIZE;
1179
1180         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1181                 struct nlattr *tc_nest = nla_nest_start(skb, i);
1182
1183                 if (!tc_nest)
1184                         return -EMSGSIZE;
1185
1186                 pgid = DCB_ATTR_VALUE_UNDEFINED;
1187                 prio = DCB_ATTR_VALUE_UNDEFINED;
1188                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1189                 up_map = DCB_ATTR_VALUE_UNDEFINED;
1190
1191                 if (!dir)
1192                         ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1193                                           &prio, &pgid, &tc_pct, &up_map);
1194                 else
1195                         ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1196                                           &prio, &pgid, &tc_pct, &up_map);
1197
1198                 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1199                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1200                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1201                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1202                         return -EMSGSIZE;
1203                 nla_nest_end(skb, tc_nest);
1204         }
1205
1206         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1207                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1208
1209                 if (!dir)
1210                         ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1211                                            &tc_pct);
1212                 else
1213                         ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1214                                            &tc_pct);
1215                 if (nla_put_u8(skb, i, tc_pct))
1216                         return -EMSGSIZE;
1217         }
1218         nla_nest_end(skb, pg);
1219         return 0;
1220 }
1221
1222 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1223 {
1224         struct nlattr *cee, *app;
1225         struct dcb_app_type *itr;
1226         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1227         int dcbx, i, err = -EMSGSIZE;
1228         u8 value;
1229
1230         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1231                 goto nla_put_failure;
1232         cee = nla_nest_start(skb, DCB_ATTR_CEE);
1233         if (!cee)
1234                 goto nla_put_failure;
1235
1236         /* local pg */
1237         if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1238                 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1239                 if (err)
1240                         goto nla_put_failure;
1241         }
1242
1243         if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1244                 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1245                 if (err)
1246                         goto nla_put_failure;
1247         }
1248
1249         /* local pfc */
1250         if (ops->getpfccfg) {
1251                 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1252
1253                 if (!pfc_nest)
1254                         goto nla_put_failure;
1255
1256                 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1257                         ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1258                         if (nla_put_u8(skb, i, value))
1259                                 goto nla_put_failure;
1260                 }
1261                 nla_nest_end(skb, pfc_nest);
1262         }
1263
1264         /* local app */
1265         spin_lock_bh(&dcb_lock);
1266         app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1267         if (!app)
1268                 goto dcb_unlock;
1269
1270         list_for_each_entry(itr, &dcb_app_list, list) {
1271                 if (itr->ifindex == netdev->ifindex) {
1272                         struct nlattr *app_nest = nla_nest_start(skb,
1273                                                                  DCB_ATTR_APP);
1274                         if (!app_nest)
1275                                 goto dcb_unlock;
1276
1277                         err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1278                                          itr->app.selector);
1279                         if (err)
1280                                 goto dcb_unlock;
1281
1282                         err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1283                                           itr->app.protocol);
1284                         if (err)
1285                                 goto dcb_unlock;
1286
1287                         err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1288                                          itr->app.priority);
1289                         if (err)
1290                                 goto dcb_unlock;
1291
1292                         nla_nest_end(skb, app_nest);
1293                 }
1294         }
1295         nla_nest_end(skb, app);
1296
1297         if (netdev->dcbnl_ops->getdcbx)
1298                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1299         else
1300                 dcbx = -EOPNOTSUPP;
1301
1302         spin_unlock_bh(&dcb_lock);
1303
1304         /* features flags */
1305         if (ops->getfeatcfg) {
1306                 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1307                 if (!feat)
1308                         goto nla_put_failure;
1309
1310                 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1311                      i++)
1312                         if (!ops->getfeatcfg(netdev, i, &value) &&
1313                             nla_put_u8(skb, i, value))
1314                                 goto nla_put_failure;
1315
1316                 nla_nest_end(skb, feat);
1317         }
1318
1319         /* peer info if available */
1320         if (ops->cee_peer_getpg) {
1321                 struct cee_pg pg;
1322                 memset(&pg, 0, sizeof(pg));
1323                 err = ops->cee_peer_getpg(netdev, &pg);
1324                 if (!err &&
1325                     nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1326                         goto nla_put_failure;
1327         }
1328
1329         if (ops->cee_peer_getpfc) {
1330                 struct cee_pfc pfc;
1331                 memset(&pfc, 0, sizeof(pfc));
1332                 err = ops->cee_peer_getpfc(netdev, &pfc);
1333                 if (!err &&
1334                     nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1335                         goto nla_put_failure;
1336         }
1337
1338         if (ops->peer_getappinfo && ops->peer_getapptable) {
1339                 err = dcbnl_build_peer_app(netdev, skb,
1340                                            DCB_ATTR_CEE_PEER_APP_TABLE,
1341                                            DCB_ATTR_CEE_PEER_APP_INFO,
1342                                            DCB_ATTR_CEE_PEER_APP);
1343                 if (err)
1344                         goto nla_put_failure;
1345         }
1346         nla_nest_end(skb, cee);
1347
1348         /* DCBX state */
1349         if (dcbx >= 0) {
1350                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1351                 if (err)
1352                         goto nla_put_failure;
1353         }
1354         return 0;
1355
1356 dcb_unlock:
1357         spin_unlock_bh(&dcb_lock);
1358 nla_put_failure:
1359         return err;
1360 }
1361
1362 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1363                         u32 seq, u32 portid, int dcbx_ver)
1364 {
1365         struct net *net = dev_net(dev);
1366         struct sk_buff *skb;
1367         struct nlmsghdr *nlh;
1368         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1369         int err;
1370
1371         if (!ops)
1372                 return -EOPNOTSUPP;
1373
1374         skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1375         if (!skb)
1376                 return -ENOBUFS;
1377
1378         if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1379                 err = dcbnl_ieee_fill(skb, dev);
1380         else
1381                 err = dcbnl_cee_fill(skb, dev);
1382
1383         if (err < 0) {
1384                 /* Report error to broadcast listeners */
1385                 nlmsg_free(skb);
1386                 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1387         } else {
1388                 /* End nlmsg and notify broadcast listeners */
1389                 nlmsg_end(skb, nlh);
1390                 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1391         }
1392
1393         return err;
1394 }
1395
1396 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1397                       u32 seq, u32 portid)
1398 {
1399         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1400 }
1401 EXPORT_SYMBOL(dcbnl_ieee_notify);
1402
1403 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1404                      u32 seq, u32 portid)
1405 {
1406         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1407 }
1408 EXPORT_SYMBOL(dcbnl_cee_notify);
1409
1410 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb SET commands.
1411  * If any requested operation can not be completed
1412  * the entire msg is aborted and error value is returned.
1413  * No attempt is made to reconcile the case where only part of the
1414  * cmd can be completed.
1415  */
1416 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1417                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1418 {
1419         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1420         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1421         int err;
1422
1423         if (!ops)
1424                 return -EOPNOTSUPP;
1425
1426         if (!tb[DCB_ATTR_IEEE])
1427                 return -EINVAL;
1428
1429         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1430                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1431         if (err)
1432                 return err;
1433
1434         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1435                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1436                 err = ops->ieee_setets(netdev, ets);
1437                 if (err)
1438                         goto err;
1439         }
1440
1441         if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1442                 struct ieee_maxrate *maxrate =
1443                         nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1444                 err = ops->ieee_setmaxrate(netdev, maxrate);
1445                 if (err)
1446                         goto err;
1447         }
1448
1449         if (ieee[DCB_ATTR_IEEE_QCN] && ops->ieee_setqcn) {
1450                 struct ieee_qcn *qcn =
1451                         nla_data(ieee[DCB_ATTR_IEEE_QCN]);
1452
1453                 err = ops->ieee_setqcn(netdev, qcn);
1454                 if (err)
1455                         goto err;
1456         }
1457
1458         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1459                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1460                 err = ops->ieee_setpfc(netdev, pfc);
1461                 if (err)
1462                         goto err;
1463         }
1464
1465         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1466                 struct nlattr *attr;
1467                 int rem;
1468
1469                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1470                         struct dcb_app *app_data;
1471                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1472                                 continue;
1473                         app_data = nla_data(attr);
1474                         if (ops->ieee_setapp)
1475                                 err = ops->ieee_setapp(netdev, app_data);
1476                         else
1477                                 err = dcb_ieee_setapp(netdev, app_data);
1478                         if (err)
1479                                 goto err;
1480                 }
1481         }
1482
1483 err:
1484         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1485         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1486         return err;
1487 }
1488
1489 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1490                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1491 {
1492         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1493
1494         if (!ops)
1495                 return -EOPNOTSUPP;
1496
1497         return dcbnl_ieee_fill(skb, netdev);
1498 }
1499
1500 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1501                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1502 {
1503         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1504         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1505         int err;
1506
1507         if (!ops)
1508                 return -EOPNOTSUPP;
1509
1510         if (!tb[DCB_ATTR_IEEE])
1511                 return -EINVAL;
1512
1513         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1514                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1515         if (err)
1516                 return err;
1517
1518         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1519                 struct nlattr *attr;
1520                 int rem;
1521
1522                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1523                         struct dcb_app *app_data;
1524
1525                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1526                                 continue;
1527                         app_data = nla_data(attr);
1528                         if (ops->ieee_delapp)
1529                                 err = ops->ieee_delapp(netdev, app_data);
1530                         else
1531                                 err = dcb_ieee_delapp(netdev, app_data);
1532                         if (err)
1533                                 goto err;
1534                 }
1535         }
1536
1537 err:
1538         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1539         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1540         return err;
1541 }
1542
1543
1544 /* DCBX configuration */
1545 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1546                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1547 {
1548         if (!netdev->dcbnl_ops->getdcbx)
1549                 return -EOPNOTSUPP;
1550
1551         return nla_put_u8(skb, DCB_ATTR_DCBX,
1552                           netdev->dcbnl_ops->getdcbx(netdev));
1553 }
1554
1555 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1556                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1557 {
1558         u8 value;
1559
1560         if (!netdev->dcbnl_ops->setdcbx)
1561                 return -EOPNOTSUPP;
1562
1563         if (!tb[DCB_ATTR_DCBX])
1564                 return -EINVAL;
1565
1566         value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1567
1568         return nla_put_u8(skb, DCB_ATTR_DCBX,
1569                           netdev->dcbnl_ops->setdcbx(netdev, value));
1570 }
1571
1572 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1573                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1574 {
1575         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1576         u8 value;
1577         int ret, i;
1578         int getall = 0;
1579
1580         if (!netdev->dcbnl_ops->getfeatcfg)
1581                 return -EOPNOTSUPP;
1582
1583         if (!tb[DCB_ATTR_FEATCFG])
1584                 return -EINVAL;
1585
1586         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1587                                dcbnl_featcfg_nest);
1588         if (ret)
1589                 return ret;
1590
1591         nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1592         if (!nest)
1593                 return -EMSGSIZE;
1594
1595         if (data[DCB_FEATCFG_ATTR_ALL])
1596                 getall = 1;
1597
1598         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1599                 if (!getall && !data[i])
1600                         continue;
1601
1602                 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1603                 if (!ret)
1604                         ret = nla_put_u8(skb, i, value);
1605
1606                 if (ret) {
1607                         nla_nest_cancel(skb, nest);
1608                         goto nla_put_failure;
1609                 }
1610         }
1611         nla_nest_end(skb, nest);
1612
1613 nla_put_failure:
1614         return ret;
1615 }
1616
1617 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1618                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1619 {
1620         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1621         int ret, i;
1622         u8 value;
1623
1624         if (!netdev->dcbnl_ops->setfeatcfg)
1625                 return -ENOTSUPP;
1626
1627         if (!tb[DCB_ATTR_FEATCFG])
1628                 return -EINVAL;
1629
1630         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1631                                dcbnl_featcfg_nest);
1632
1633         if (ret)
1634                 goto err;
1635
1636         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1637                 if (data[i] == NULL)
1638                         continue;
1639
1640                 value = nla_get_u8(data[i]);
1641
1642                 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1643
1644                 if (ret)
1645                         goto err;
1646         }
1647 err:
1648         ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1649
1650         return ret;
1651 }
1652
1653 /* Handle CEE DCBX GET commands. */
1654 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1655                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1656 {
1657         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1658
1659         if (!ops)
1660                 return -EOPNOTSUPP;
1661
1662         return dcbnl_cee_fill(skb, netdev);
1663 }
1664
1665 struct reply_func {
1666         /* reply netlink message type */
1667         int     type;
1668
1669         /* function to fill message contents */
1670         int   (*cb)(struct net_device *, struct nlmsghdr *, u32,
1671                     struct nlattr **, struct sk_buff *);
1672 };
1673
1674 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1675         [DCB_CMD_GSTATE]        = { RTM_GETDCB, dcbnl_getstate },
1676         [DCB_CMD_SSTATE]        = { RTM_SETDCB, dcbnl_setstate },
1677         [DCB_CMD_PFC_GCFG]      = { RTM_GETDCB, dcbnl_getpfccfg },
1678         [DCB_CMD_PFC_SCFG]      = { RTM_SETDCB, dcbnl_setpfccfg },
1679         [DCB_CMD_GPERM_HWADDR]  = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1680         [DCB_CMD_GCAP]          = { RTM_GETDCB, dcbnl_getcap },
1681         [DCB_CMD_GNUMTCS]       = { RTM_GETDCB, dcbnl_getnumtcs },
1682         [DCB_CMD_SNUMTCS]       = { RTM_SETDCB, dcbnl_setnumtcs },
1683         [DCB_CMD_PFC_GSTATE]    = { RTM_GETDCB, dcbnl_getpfcstate },
1684         [DCB_CMD_PFC_SSTATE]    = { RTM_SETDCB, dcbnl_setpfcstate },
1685         [DCB_CMD_GAPP]          = { RTM_GETDCB, dcbnl_getapp },
1686         [DCB_CMD_SAPP]          = { RTM_SETDCB, dcbnl_setapp },
1687         [DCB_CMD_PGTX_GCFG]     = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1688         [DCB_CMD_PGTX_SCFG]     = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1689         [DCB_CMD_PGRX_GCFG]     = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1690         [DCB_CMD_PGRX_SCFG]     = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1691         [DCB_CMD_SET_ALL]       = { RTM_SETDCB, dcbnl_setall },
1692         [DCB_CMD_BCN_GCFG]      = { RTM_GETDCB, dcbnl_bcn_getcfg },
1693         [DCB_CMD_BCN_SCFG]      = { RTM_SETDCB, dcbnl_bcn_setcfg },
1694         [DCB_CMD_IEEE_GET]      = { RTM_GETDCB, dcbnl_ieee_get },
1695         [DCB_CMD_IEEE_SET]      = { RTM_SETDCB, dcbnl_ieee_set },
1696         [DCB_CMD_IEEE_DEL]      = { RTM_SETDCB, dcbnl_ieee_del },
1697         [DCB_CMD_GDCBX]         = { RTM_GETDCB, dcbnl_getdcbx },
1698         [DCB_CMD_SDCBX]         = { RTM_SETDCB, dcbnl_setdcbx },
1699         [DCB_CMD_GFEATCFG]      = { RTM_GETDCB, dcbnl_getfeatcfg },
1700         [DCB_CMD_SFEATCFG]      = { RTM_SETDCB, dcbnl_setfeatcfg },
1701         [DCB_CMD_CEE_GET]       = { RTM_GETDCB, dcbnl_cee_get },
1702 };
1703
1704 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh)
1705 {
1706         struct net *net = sock_net(skb->sk);
1707         struct net_device *netdev;
1708         struct dcbmsg *dcb = nlmsg_data(nlh);
1709         struct nlattr *tb[DCB_ATTR_MAX + 1];
1710         u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1711         int ret = -EINVAL;
1712         struct sk_buff *reply_skb;
1713         struct nlmsghdr *reply_nlh = NULL;
1714         const struct reply_func *fn;
1715
1716         if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
1717                 return -EPERM;
1718
1719         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1720                           dcbnl_rtnl_policy);
1721         if (ret < 0)
1722                 return ret;
1723
1724         if (dcb->cmd > DCB_CMD_MAX)
1725                 return -EINVAL;
1726
1727         /* check if a reply function has been defined for the command */
1728         fn = &reply_funcs[dcb->cmd];
1729         if (!fn->cb)
1730                 return -EOPNOTSUPP;
1731
1732         if (!tb[DCB_ATTR_IFNAME])
1733                 return -EINVAL;
1734
1735         netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1736         if (!netdev)
1737                 return -ENODEV;
1738
1739         if (!netdev->dcbnl_ops)
1740                 return -EOPNOTSUPP;
1741
1742         reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1743                                  nlh->nlmsg_flags, &reply_nlh);
1744         if (!reply_skb)
1745                 return -ENOBUFS;
1746
1747         ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1748         if (ret < 0) {
1749                 nlmsg_free(reply_skb);
1750                 goto out;
1751         }
1752
1753         nlmsg_end(reply_skb, reply_nlh);
1754
1755         ret = rtnl_unicast(reply_skb, net, portid);
1756 out:
1757         return ret;
1758 }
1759
1760 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1761                                            int ifindex, int prio)
1762 {
1763         struct dcb_app_type *itr;
1764
1765         list_for_each_entry(itr, &dcb_app_list, list) {
1766                 if (itr->app.selector == app->selector &&
1767                     itr->app.protocol == app->protocol &&
1768                     itr->ifindex == ifindex &&
1769                     (!prio || itr->app.priority == prio))
1770                         return itr;
1771         }
1772
1773         return NULL;
1774 }
1775
1776 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1777 {
1778         struct dcb_app_type *entry;
1779
1780         entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1781         if (!entry)
1782                 return -ENOMEM;
1783
1784         memcpy(&entry->app, app, sizeof(*app));
1785         entry->ifindex = ifindex;
1786         list_add(&entry->list, &dcb_app_list);
1787
1788         return 0;
1789 }
1790
1791 /**
1792  * dcb_getapp - retrieve the DCBX application user priority
1793  *
1794  * On success returns a non-zero 802.1p user priority bitmap
1795  * otherwise returns 0 as the invalid user priority bitmap to
1796  * indicate an error.
1797  */
1798 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1799 {
1800         struct dcb_app_type *itr;
1801         u8 prio = 0;
1802
1803         spin_lock_bh(&dcb_lock);
1804         if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1805                 prio = itr->app.priority;
1806         spin_unlock_bh(&dcb_lock);
1807
1808         return prio;
1809 }
1810 EXPORT_SYMBOL(dcb_getapp);
1811
1812 /**
1813  * dcb_setapp - add CEE dcb application data to app list
1814  *
1815  * Priority 0 is an invalid priority in CEE spec. This routine
1816  * removes applications from the app list if the priority is
1817  * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap
1818  */
1819 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1820 {
1821         struct dcb_app_type *itr;
1822         struct dcb_app_type event;
1823         int err = 0;
1824
1825         event.ifindex = dev->ifindex;
1826         memcpy(&event.app, new, sizeof(event.app));
1827         if (dev->dcbnl_ops->getdcbx)
1828                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1829
1830         spin_lock_bh(&dcb_lock);
1831         /* Search for existing match and replace */
1832         if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1833                 if (new->priority)
1834                         itr->app.priority = new->priority;
1835                 else {
1836                         list_del(&itr->list);
1837                         kfree(itr);
1838                 }
1839                 goto out;
1840         }
1841         /* App type does not exist add new application type */
1842         if (new->priority)
1843                 err = dcb_app_add(new, dev->ifindex);
1844 out:
1845         spin_unlock_bh(&dcb_lock);
1846         if (!err)
1847                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1848         return err;
1849 }
1850 EXPORT_SYMBOL(dcb_setapp);
1851
1852 /**
1853  * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1854  *
1855  * Helper routine which on success returns a non-zero 802.1Qaz user
1856  * priority bitmap otherwise returns 0 to indicate the dcb_app was
1857  * not found in APP list.
1858  */
1859 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1860 {
1861         struct dcb_app_type *itr;
1862         u8 prio = 0;
1863
1864         spin_lock_bh(&dcb_lock);
1865         if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1866                 prio |= 1 << itr->app.priority;
1867         spin_unlock_bh(&dcb_lock);
1868
1869         return prio;
1870 }
1871 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1872
1873 /**
1874  * dcb_ieee_setapp - add IEEE dcb application data to app list
1875  *
1876  * This adds Application data to the list. Multiple application
1877  * entries may exists for the same selector and protocol as long
1878  * as the priorities are different. Priority is expected to be a
1879  * 3-bit unsigned integer
1880  */
1881 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1882 {
1883         struct dcb_app_type event;
1884         int err = 0;
1885
1886         event.ifindex = dev->ifindex;
1887         memcpy(&event.app, new, sizeof(event.app));
1888         if (dev->dcbnl_ops->getdcbx)
1889                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1890
1891         spin_lock_bh(&dcb_lock);
1892         /* Search for existing match and abort if found */
1893         if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1894                 err = -EEXIST;
1895                 goto out;
1896         }
1897
1898         err = dcb_app_add(new, dev->ifindex);
1899 out:
1900         spin_unlock_bh(&dcb_lock);
1901         if (!err)
1902                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1903         return err;
1904 }
1905 EXPORT_SYMBOL(dcb_ieee_setapp);
1906
1907 /**
1908  * dcb_ieee_delapp - delete IEEE dcb application data from list
1909  *
1910  * This removes a matching APP data from the APP list
1911  */
1912 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1913 {
1914         struct dcb_app_type *itr;
1915         struct dcb_app_type event;
1916         int err = -ENOENT;
1917
1918         event.ifindex = dev->ifindex;
1919         memcpy(&event.app, del, sizeof(event.app));
1920         if (dev->dcbnl_ops->getdcbx)
1921                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1922
1923         spin_lock_bh(&dcb_lock);
1924         /* Search for existing match and remove it. */
1925         if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1926                 list_del(&itr->list);
1927                 kfree(itr);
1928                 err = 0;
1929         }
1930
1931         spin_unlock_bh(&dcb_lock);
1932         if (!err)
1933                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1934         return err;
1935 }
1936 EXPORT_SYMBOL(dcb_ieee_delapp);
1937
1938 static void dcb_flushapp(void)
1939 {
1940         struct dcb_app_type *app;
1941         struct dcb_app_type *tmp;
1942
1943         spin_lock_bh(&dcb_lock);
1944         list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1945                 list_del(&app->list);
1946                 kfree(app);
1947         }
1948         spin_unlock_bh(&dcb_lock);
1949 }
1950
1951 static int __init dcbnl_init(void)
1952 {
1953         INIT_LIST_HEAD(&dcb_app_list);
1954
1955         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1956         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1957
1958         return 0;
1959 }
1960 module_init(dcbnl_init);
1961
1962 static void __exit dcbnl_exit(void)
1963 {
1964         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1965         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1966         dcb_flushapp();
1967 }
1968 module_exit(dcbnl_exit);