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