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, write to the Free Software Foundation, Inc., 59 Temple
  15  * Place - Suite 330, Boston, MA 02111-1307 USA.
  16  *
  17  * Author: Lucy Liu <lucy.liu@intel.com>
  18  */
  19
  20 #include <linux/netdevice.h>
  21 #include <linux/netlink.h>
  22 #include <linux/slab.h>
  23 #include <net/netlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <linux/dcbnl.h>
  26 #include <net/dcbevent.h>
  27 #include <linux/rtnetlink.h>
  28 #include <linux/module.h>
  29 #include <net/sock.h>
  30
  31 /* Data Center Bridging (DCB) is a collection of Ethernet enhancements
  32  * intended to allow network traffic with differing requirements
  33  * (highly reliable, no drops vs. best effort vs. low latency) to operate
  34  * and co-exist on Ethernet.  Current DCB features are:
  35  *
  36  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
  37  *   framework for assigning bandwidth guarantees to traffic classes.
  38  *
  39  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
  40  *   can work independently for each 802.1p priority.
  41  *
  42  * Congestion Notification - provides a mechanism for end-to-end congestion
  43  *   control for protocols which do not have built-in congestion management.
  44  *
  45  * More information about the emerging standards for these Ethernet features
  46  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
  47  *
  48  * This file implements an rtnetlink interface to allow configuration of DCB
  49  * features for capable devices.
  50  */
  51
  52 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
  53 MODULE_DESCRIPTION("Data Center Bridging netlink interface");
  54 MODULE_LICENSE("GPL");
  55
  56 /**************** DCB attribute policies *************************************/
  57
  58 /* DCB netlink attributes policy */
  59 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
  60         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  61         [DCB_ATTR_STATE]       = {.type = NLA_U8},
  62         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  63         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  64         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
  65         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
  66         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  67         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  68         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
  69         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
  70         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
  71         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
  72         [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
  73 };
  74
  75 /* DCB priority flow control to User Priority nested attributes */
  76 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
  77         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  78         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  79         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  80         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  81         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  82         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  83         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  84         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  85         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  86 };
  87
  88 /* DCB priority grouping nested attributes */
  89 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
  90         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  91         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  92         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  93         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  94         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  95         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  96         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  97         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  98         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  99         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
 100         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
 101         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
 102         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
 103         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
 104         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
 105         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
 106         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
 107         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
 108 };
 109
 110 /* DCB traffic class nested attributes. */
 111 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
 112         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
 113         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
 114         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
 115         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
 116         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
 117 };
 118
 119 /* DCB capabilities nested attributes. */
 120 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
 121         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
 122         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
 123         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
 124         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
 125         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
 126         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
 127         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
 128         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
 129         [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
 130 };
 131
 132 /* DCB capabilities nested attributes. */
 133 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
 134         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
 135         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
 136         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
 137 };
 138
 139 /* DCB BCN nested attributes. */
 140 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
 141         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
 142         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
 143         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
 144         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
 145         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
 146         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
 147         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
 148         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
 149         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
 150         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
 151         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
 152         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
 153         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
 154         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
 155         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
 156         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
 157         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
 158         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
 159         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
 160         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
 161         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
 162         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
 163         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
 164         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
 165         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
 166 };
 167
 168 /* DCB APP nested attributes. */
 169 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
 170         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
 171         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
 172         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
 173 };
 174
 175 /* IEEE 802.1Qaz nested attributes. */
 176 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
 177         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
 178         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
 179         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
 180         [DCB_ATTR_IEEE_MAXRATE]   = {.len = sizeof(struct ieee_maxrate)},
 181 };
 182
 183 static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
 184         [DCB_ATTR_IEEE_APP]         = {.len = sizeof(struct dcb_app)},
 185 };
 186
 187 /* DCB number of traffic classes nested attributes. */
 188 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
 189         [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
 190         [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
 191         [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
 192         [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
 193 };
 194
 195 static LIST_HEAD(dcb_app_list);
 196 static DEFINE_SPINLOCK(dcb_lock);
 197
 198 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
 199                                     u32 flags, struct nlmsghdr **nlhp)
 200 {
 201         struct sk_buff *skb;
 202         struct dcbmsg *dcb;
 203         struct nlmsghdr *nlh;
 204
 205         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 206         if (!skb)
 207                 return NULL;
 208
 209         nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
 210         BUG_ON(!nlh);
 211
 212         dcb = nlmsg_data(nlh);
 213         dcb->dcb_family = AF_UNSPEC;
 214         dcb->cmd = cmd;
 215         dcb->dcb_pad = 0;
 216
 217         if (nlhp)
 218                 *nlhp = nlh;
 219
 220         return skb;
 221 }
 222
 223 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
 224                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 225 {
 226         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
 227         if (!netdev->dcbnl_ops->getstate)
 228                 return -EOPNOTSUPP;
 229
 230         return nla_put_u8(skb, DCB_ATTR_STATE,
 231                           netdev->dcbnl_ops->getstate(netdev));
 232 }
 233
 234 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 235                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 236 {
 237         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
 238         u8 value;
 239         int ret;
 240         int i;
 241         int getall = 0;
 242
 243         if (!tb[DCB_ATTR_PFC_CFG])
 244                 return -EINVAL;
 245
 246         if (!netdev->dcbnl_ops->getpfccfg)
 247                 return -EOPNOTSUPP;
 248
 249         ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
 250                                tb[DCB_ATTR_PFC_CFG],
 251                                dcbnl_pfc_up_nest);
 252         if (ret)
 253                 return ret;
 254
 255         nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
 256         if (!nest)
 257                 return -EMSGSIZE;
 258
 259         if (data[DCB_PFC_UP_ATTR_ALL])
 260                 getall = 1;
 261
 262         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 263                 if (!getall && !data[i])
 264                         continue;
 265
 266                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
 267                                              &value);
 268                 ret = nla_put_u8(skb, i, value);
 269                 if (ret) {
 270                         nla_nest_cancel(skb, nest);
 271                         return ret;
 272                 }
 273         }
 274         nla_nest_end(skb, nest);
 275
 276         return 0;
 277 }
 278
 279 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
 280                                 u32 seq, struct nlattr **tb, struct sk_buff *skb)
 281 {
 282         u8 perm_addr[MAX_ADDR_LEN];
 283
 284         if (!netdev->dcbnl_ops->getpermhwaddr)
 285                 return -EOPNOTSUPP;
 286
 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                 err = ops->ieee_getets(netdev, &ets);
1046                 if (!err &&
1047                     nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1048                         return -EMSGSIZE;
1049         }
1050
1051         if (ops->ieee_getmaxrate) {
1052                 struct ieee_maxrate maxrate;
1053                 err = ops->ieee_getmaxrate(netdev, &maxrate);
1054                 if (!err) {
1055                         err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1056                                       sizeof(maxrate), &maxrate);
1057                         if (err)
1058                                 return -EMSGSIZE;
1059                 }
1060         }
1061
1062         if (ops->ieee_getpfc) {
1063                 struct ieee_pfc pfc;
1064                 err = ops->ieee_getpfc(netdev, &pfc);
1065                 if (!err &&
1066                     nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1067                         return -EMSGSIZE;
1068         }
1069
1070         app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
1071         if (!app)
1072                 return -EMSGSIZE;
1073
1074         spin_lock(&dcb_lock);
1075         list_for_each_entry(itr, &dcb_app_list, list) {
1076                 if (itr->ifindex == netdev->ifindex) {
1077                         err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1078                                          &itr->app);
1079                         if (err) {
1080                                 spin_unlock(&dcb_lock);
1081                                 return -EMSGSIZE;
1082                         }
1083                 }
1084         }
1085
1086         if (netdev->dcbnl_ops->getdcbx)
1087                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1088         else
1089                 dcbx = -EOPNOTSUPP;
1090
1091         spin_unlock(&dcb_lock);
1092         nla_nest_end(skb, app);
1093
1094         /* get peer info if available */
1095         if (ops->ieee_peer_getets) {
1096                 struct ieee_ets ets;
1097                 err = ops->ieee_peer_getets(netdev, &ets);
1098                 if (!err &&
1099                     nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1100                         return -EMSGSIZE;
1101         }
1102
1103         if (ops->ieee_peer_getpfc) {
1104                 struct ieee_pfc pfc;
1105                 err = ops->ieee_peer_getpfc(netdev, &pfc);
1106                 if (!err &&
1107                     nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1108                         return -EMSGSIZE;
1109         }
1110
1111         if (ops->peer_getappinfo && ops->peer_getapptable) {
1112                 err = dcbnl_build_peer_app(netdev, skb,
1113                                            DCB_ATTR_IEEE_PEER_APP,
1114                                            DCB_ATTR_IEEE_APP_UNSPEC,
1115                                            DCB_ATTR_IEEE_APP);
1116                 if (err)
1117                         return -EMSGSIZE;
1118         }
1119
1120         nla_nest_end(skb, ieee);
1121         if (dcbx >= 0) {
1122                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1123                 if (err)
1124                         return -EMSGSIZE;
1125         }
1126
1127         return 0;
1128 }
1129
1130 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1131                              int dir)
1132 {
1133         u8 pgid, up_map, prio, tc_pct;
1134         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1135         int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1136         struct nlattr *pg = nla_nest_start(skb, i);
1137
1138         if (!pg)
1139                 return -EMSGSIZE;
1140
1141         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1142                 struct nlattr *tc_nest = nla_nest_start(skb, i);
1143
1144                 if (!tc_nest)
1145                         return -EMSGSIZE;
1146
1147                 pgid = DCB_ATTR_VALUE_UNDEFINED;
1148                 prio = DCB_ATTR_VALUE_UNDEFINED;
1149                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1150                 up_map = DCB_ATTR_VALUE_UNDEFINED;
1151
1152                 if (!dir)
1153                         ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1154                                           &prio, &pgid, &tc_pct, &up_map);
1155                 else
1156                         ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1157                                           &prio, &pgid, &tc_pct, &up_map);
1158
1159                 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1160                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1161                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1162                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1163                         return -EMSGSIZE;
1164                 nla_nest_end(skb, tc_nest);
1165         }
1166
1167         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1168                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1169
1170                 if (!dir)
1171                         ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1172                                            &tc_pct);
1173                 else
1174                         ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1175                                            &tc_pct);
1176                 if (nla_put_u8(skb, i, tc_pct))
1177                         return -EMSGSIZE;
1178         }
1179         nla_nest_end(skb, pg);
1180         return 0;
1181 }
1182
1183 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1184 {
1185         struct nlattr *cee, *app;
1186         struct dcb_app_type *itr;
1187         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1188         int dcbx, i, err = -EMSGSIZE;
1189         u8 value;
1190
1191         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1192                 goto nla_put_failure;
1193         cee = nla_nest_start(skb, DCB_ATTR_CEE);
1194         if (!cee)
1195                 goto nla_put_failure;
1196
1197         /* local pg */
1198         if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1199                 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1200                 if (err)
1201                         goto nla_put_failure;
1202         }
1203
1204         if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1205                 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1206                 if (err)
1207                         goto nla_put_failure;
1208         }
1209
1210         /* local pfc */
1211         if (ops->getpfccfg) {
1212                 struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
1213
1214                 if (!pfc_nest)
1215                         goto nla_put_failure;
1216
1217                 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1218                         ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1219                         if (nla_put_u8(skb, i, value))
1220                                 goto nla_put_failure;
1221                 }
1222                 nla_nest_end(skb, pfc_nest);
1223         }
1224
1225         /* local app */
1226         spin_lock(&dcb_lock);
1227         app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
1228         if (!app)
1229                 goto dcb_unlock;
1230
1231         list_for_each_entry(itr, &dcb_app_list, list) {
1232                 if (itr->ifindex == netdev->ifindex) {
1233                         struct nlattr *app_nest = nla_nest_start(skb,
1234                                                                  DCB_ATTR_APP);
1235                         if (!app_nest)
1236                                 goto dcb_unlock;
1237
1238                         err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1239                                          itr->app.selector);
1240                         if (err)
1241                                 goto dcb_unlock;
1242
1243                         err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1244                                           itr->app.protocol);
1245                         if (err)
1246                                 goto dcb_unlock;
1247
1248                         err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1249                                          itr->app.priority);
1250                         if (err)
1251                                 goto dcb_unlock;
1252
1253                         nla_nest_end(skb, app_nest);
1254                 }
1255         }
1256         nla_nest_end(skb, app);
1257
1258         if (netdev->dcbnl_ops->getdcbx)
1259                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1260         else
1261                 dcbx = -EOPNOTSUPP;
1262
1263         spin_unlock(&dcb_lock);
1264
1265         /* features flags */
1266         if (ops->getfeatcfg) {
1267                 struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
1268                 if (!feat)
1269                         goto nla_put_failure;
1270
1271                 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1272                      i++)
1273                         if (!ops->getfeatcfg(netdev, i, &value) &&
1274                             nla_put_u8(skb, i, value))
1275                                 goto nla_put_failure;
1276
1277                 nla_nest_end(skb, feat);
1278         }
1279
1280         /* peer info if available */
1281         if (ops->cee_peer_getpg) {
1282                 struct cee_pg pg;
1283                 err = ops->cee_peer_getpg(netdev, &pg);
1284                 if (!err &&
1285                     nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1286                         goto nla_put_failure;
1287         }
1288
1289         if (ops->cee_peer_getpfc) {
1290                 struct cee_pfc pfc;
1291                 err = ops->cee_peer_getpfc(netdev, &pfc);
1292                 if (!err &&
1293                     nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1294                         goto nla_put_failure;
1295         }
1296
1297         if (ops->peer_getappinfo && ops->peer_getapptable) {
1298                 err = dcbnl_build_peer_app(netdev, skb,
1299                                            DCB_ATTR_CEE_PEER_APP_TABLE,
1300                                            DCB_ATTR_CEE_PEER_APP_INFO,
1301                                            DCB_ATTR_CEE_PEER_APP);
1302                 if (err)
1303                         goto nla_put_failure;
1304         }
1305         nla_nest_end(skb, cee);
1306
1307         /* DCBX state */
1308         if (dcbx >= 0) {
1309                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1310                 if (err)
1311                         goto nla_put_failure;
1312         }
1313         return 0;
1314
1315 dcb_unlock:
1316         spin_unlock(&dcb_lock);
1317 nla_put_failure:
1318         return err;
1319 }
1320
1321 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1322                         u32 seq, u32 portid, int dcbx_ver)
1323 {
1324         struct net *net = dev_net(dev);
1325         struct sk_buff *skb;
1326         struct nlmsghdr *nlh;
1327         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1328         int err;
1329
1330         if (!ops)
1331                 return -EOPNOTSUPP;
1332
1333         skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1334         if (!skb)
1335                 return -ENOBUFS;
1336
1337         if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1338                 err = dcbnl_ieee_fill(skb, dev);
1339         else
1340                 err = dcbnl_cee_fill(skb, dev);
1341
1342         if (err < 0) {
1343                 /* Report error to broadcast listeners */
1344                 nlmsg_free(skb);
1345                 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1346         } else {
1347                 /* End nlmsg and notify broadcast listeners */
1348                 nlmsg_end(skb, nlh);
1349                 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1350         }
1351
1352         return err;
1353 }
1354
1355 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1356                       u32 seq, u32 portid)
1357 {
1358         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1359 }
1360 EXPORT_SYMBOL(dcbnl_ieee_notify);
1361
1362 int dcbnl_cee_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_CEE);
1366 }
1367 EXPORT_SYMBOL(dcbnl_cee_notify);
1368
1369 /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
1370  * be completed the entire msg is aborted and error value is returned.
1371  * No attempt is made to reconcile the case where only part of the
1372  * cmd can be completed.
1373  */
1374 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1375                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1376 {
1377         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1378         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1379         int err;
1380
1381         if (!ops)
1382                 return -EOPNOTSUPP;
1383
1384         if (!tb[DCB_ATTR_IEEE])
1385                 return -EINVAL;
1386
1387         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1388                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1389         if (err)
1390                 return err;
1391
1392         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1393                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1394                 err = ops->ieee_setets(netdev, ets);
1395                 if (err)
1396                         goto err;
1397         }
1398
1399         if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1400                 struct ieee_maxrate *maxrate =
1401                         nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1402                 err = ops->ieee_setmaxrate(netdev, maxrate);
1403                 if (err)
1404                         goto err;
1405         }
1406
1407         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1408                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1409                 err = ops->ieee_setpfc(netdev, pfc);
1410                 if (err)
1411                         goto err;
1412         }
1413
1414         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1415                 struct nlattr *attr;
1416                 int rem;
1417
1418                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1419                         struct dcb_app *app_data;
1420                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1421                                 continue;
1422                         app_data = nla_data(attr);
1423                         if (ops->ieee_setapp)
1424                                 err = ops->ieee_setapp(netdev, app_data);
1425                         else
1426                                 err = dcb_ieee_setapp(netdev, app_data);
1427                         if (err)
1428                                 goto err;
1429                 }
1430         }
1431
1432 err:
1433         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1434         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1435         return err;
1436 }
1437
1438 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1439                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1440 {
1441         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1442
1443         if (!ops)
1444                 return -EOPNOTSUPP;
1445
1446         return dcbnl_ieee_fill(skb, netdev);
1447 }
1448
1449 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1450                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1451 {
1452         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1453         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1454         int err;
1455
1456         if (!ops)
1457                 return -EOPNOTSUPP;
1458
1459         if (!tb[DCB_ATTR_IEEE])
1460                 return -EINVAL;
1461
1462         err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
1463                                tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
1464         if (err)
1465                 return err;
1466
1467         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1468                 struct nlattr *attr;
1469                 int rem;
1470
1471                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1472                         struct dcb_app *app_data;
1473
1474                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1475                                 continue;
1476                         app_data = nla_data(attr);
1477                         if (ops->ieee_delapp)
1478                                 err = ops->ieee_delapp(netdev, app_data);
1479                         else
1480                                 err = dcb_ieee_delapp(netdev, app_data);
1481                         if (err)
1482                                 goto err;
1483                 }
1484         }
1485
1486 err:
1487         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1488         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1489         return err;
1490 }
1491
1492
1493 /* DCBX configuration */
1494 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1495                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1496 {
1497         if (!netdev->dcbnl_ops->getdcbx)
1498                 return -EOPNOTSUPP;
1499
1500         return nla_put_u8(skb, DCB_ATTR_DCBX,
1501                           netdev->dcbnl_ops->getdcbx(netdev));
1502 }
1503
1504 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1505                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1506 {
1507         u8 value;
1508
1509         if (!netdev->dcbnl_ops->setdcbx)
1510                 return -EOPNOTSUPP;
1511
1512         if (!tb[DCB_ATTR_DCBX])
1513                 return -EINVAL;
1514
1515         value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1516
1517         return nla_put_u8(skb, DCB_ATTR_DCBX,
1518                           netdev->dcbnl_ops->setdcbx(netdev, value));
1519 }
1520
1521 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1522                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1523 {
1524         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1525         u8 value;
1526         int ret, i;
1527         int getall = 0;
1528
1529         if (!netdev->dcbnl_ops->getfeatcfg)
1530                 return -EOPNOTSUPP;
1531
1532         if (!tb[DCB_ATTR_FEATCFG])
1533                 return -EINVAL;
1534
1535         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1536                                dcbnl_featcfg_nest);
1537         if (ret)
1538                 return ret;
1539
1540         nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
1541         if (!nest)
1542                 return -EMSGSIZE;
1543
1544         if (data[DCB_FEATCFG_ATTR_ALL])
1545                 getall = 1;
1546
1547         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1548                 if (!getall && !data[i])
1549                         continue;
1550
1551                 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1552                 if (!ret)
1553                         ret = nla_put_u8(skb, i, value);
1554
1555                 if (ret) {
1556                         nla_nest_cancel(skb, nest);
1557                         goto nla_put_failure;
1558                 }
1559         }
1560         nla_nest_end(skb, nest);
1561
1562 nla_put_failure:
1563         return ret;
1564 }
1565
1566 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1567                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1568 {
1569         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1570         int ret, i;
1571         u8 value;
1572
1573         if (!netdev->dcbnl_ops->setfeatcfg)
1574                 return -ENOTSUPP;
1575
1576         if (!tb[DCB_ATTR_FEATCFG])
1577                 return -EINVAL;
1578
1579         ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
1580                                dcbnl_featcfg_nest);
1581
1582         if (ret)
1583                 goto err;
1584
1585         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1586                 if (data[i] == NULL)
1587                         continue;
1588
1589                 value = nla_get_u8(data[i]);
1590
1591                 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1592
1593                 if (ret)
1594                         goto err;
1595         }
1596 err:
1597         ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1598
1599         return ret;
1600 }
1601
1602 /* Handle CEE DCBX GET commands. */
1603 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1604                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1605 {
1606         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1607
1608         if (!ops)
1609                 return -EOPNOTSUPP;
1610
1611         return dcbnl_cee_fill(skb, netdev);
1612 }
1613
1614 struct reply_func {
1615         /* reply netlink message type */
1616         int     type;
1617
1618         /* function to fill message contents */
1619         int   (*cb)(struct net_device *, struct nlmsghdr *, u32,
1620                     struct nlattr **, struct sk_buff *);
1621 };
1622
1623 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1624         [DCB_CMD_GSTATE]        = { RTM_GETDCB, dcbnl_getstate },
1625         [DCB_CMD_SSTATE]        = { RTM_SETDCB, dcbnl_setstate },
1626         [DCB_CMD_PFC_GCFG]      = { RTM_GETDCB, dcbnl_getpfccfg },
1627         [DCB_CMD_PFC_SCFG]      = { RTM_SETDCB, dcbnl_setpfccfg },
1628         [DCB_CMD_GPERM_HWADDR]  = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1629         [DCB_CMD_GCAP]          = { RTM_GETDCB, dcbnl_getcap },
1630         [DCB_CMD_GNUMTCS]       = { RTM_GETDCB, dcbnl_getnumtcs },
1631         [DCB_CMD_SNUMTCS]       = { RTM_SETDCB, dcbnl_setnumtcs },
1632         [DCB_CMD_PFC_GSTATE]    = { RTM_GETDCB, dcbnl_getpfcstate },
1633         [DCB_CMD_PFC_SSTATE]    = { RTM_SETDCB, dcbnl_setpfcstate },
1634         [DCB_CMD_GAPP]          = { RTM_GETDCB, dcbnl_getapp },
1635         [DCB_CMD_SAPP]          = { RTM_SETDCB, dcbnl_setapp },
1636         [DCB_CMD_PGTX_GCFG]     = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1637         [DCB_CMD_PGTX_SCFG]     = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1638         [DCB_CMD_PGRX_GCFG]     = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1639         [DCB_CMD_PGRX_SCFG]     = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1640         [DCB_CMD_SET_ALL]       = { RTM_SETDCB, dcbnl_setall },
1641         [DCB_CMD_BCN_GCFG]      = { RTM_GETDCB, dcbnl_bcn_getcfg },
1642         [DCB_CMD_BCN_SCFG]      = { RTM_SETDCB, dcbnl_bcn_setcfg },
1643         [DCB_CMD_IEEE_GET]      = { RTM_GETDCB, dcbnl_ieee_get },
1644         [DCB_CMD_IEEE_SET]      = { RTM_SETDCB, dcbnl_ieee_set },
1645         [DCB_CMD_IEEE_DEL]      = { RTM_SETDCB, dcbnl_ieee_del },
1646         [DCB_CMD_GDCBX]         = { RTM_GETDCB, dcbnl_getdcbx },
1647         [DCB_CMD_SDCBX]         = { RTM_SETDCB, dcbnl_setdcbx },
1648         [DCB_CMD_GFEATCFG]      = { RTM_GETDCB, dcbnl_getfeatcfg },
1649         [DCB_CMD_SFEATCFG]      = { RTM_SETDCB, dcbnl_setfeatcfg },
1650         [DCB_CMD_CEE_GET]       = { RTM_GETDCB, dcbnl_cee_get },
1651 };
1652
1653 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
1654 {
1655         struct net *net = sock_net(skb->sk);
1656         struct net_device *netdev;
1657         struct dcbmsg *dcb = nlmsg_data(nlh);
1658         struct nlattr *tb[DCB_ATTR_MAX + 1];
1659         u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1660         int ret = -EINVAL;
1661         struct sk_buff *reply_skb;
1662         struct nlmsghdr *reply_nlh = NULL;
1663         const struct reply_func *fn;
1664
1665         if ((nlh->nlmsg_type == RTM_SETDCB) && !capable(CAP_NET_ADMIN))
1666                 return -EPERM;
1667
1668         ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1669                           dcbnl_rtnl_policy);
1670         if (ret < 0)
1671                 return ret;
1672
1673         if (dcb->cmd > DCB_CMD_MAX)
1674                 return -EINVAL;
1675
1676         /* check if a reply function has been defined for the command */
1677         fn = &reply_funcs[dcb->cmd];
1678         if (!fn->cb)
1679                 return -EOPNOTSUPP;
1680
1681         if (!tb[DCB_ATTR_IFNAME])
1682                 return -EINVAL;
1683
1684         netdev = dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1685         if (!netdev)
1686                 return -ENODEV;
1687
1688         if (!netdev->dcbnl_ops) {
1689                 ret = -EOPNOTSUPP;
1690                 goto out;
1691         }
1692
1693         reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1694                                  nlh->nlmsg_flags, &reply_nlh);
1695         if (!reply_skb) {
1696                 ret = -ENOBUFS;
1697                 goto out;
1698         }
1699
1700         ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1701         if (ret < 0) {
1702                 nlmsg_free(reply_skb);
1703                 goto out;
1704         }
1705
1706         nlmsg_end(reply_skb, reply_nlh);
1707
1708         ret = rtnl_unicast(reply_skb, net, portid);
1709 out:
1710         dev_put(netdev);
1711         return ret;
1712 }
1713
1714 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1715                                            int ifindex, int prio)
1716 {
1717         struct dcb_app_type *itr;
1718
1719         list_for_each_entry(itr, &dcb_app_list, list) {
1720                 if (itr->app.selector == app->selector &&
1721                     itr->app.protocol == app->protocol &&
1722                     itr->ifindex == ifindex &&
1723                     (!prio || itr->app.priority == prio))
1724                         return itr;
1725         }
1726
1727         return NULL;
1728 }
1729
1730 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1731 {
1732         struct dcb_app_type *entry;
1733
1734         entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1735         if (!entry)
1736                 return -ENOMEM;
1737
1738         memcpy(&entry->app, app, sizeof(*app));
1739         entry->ifindex = ifindex;
1740         list_add(&entry->list, &dcb_app_list);
1741
1742         return 0;
1743 }
1744
1745 /**
1746  * dcb_getapp - retrieve the DCBX application user priority
1747  *
1748  * On success returns a non-zero 802.1p user priority bitmap
1749  * otherwise returns 0 as the invalid user priority bitmap to
1750  * indicate an error.
1751  */
1752 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1753 {
1754         struct dcb_app_type *itr;
1755         u8 prio = 0;
1756
1757         spin_lock(&dcb_lock);
1758         if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1759                 prio = itr->app.priority;
1760         spin_unlock(&dcb_lock);
1761
1762         return prio;
1763 }
1764 EXPORT_SYMBOL(dcb_getapp);
1765
1766 /**
1767  * dcb_setapp - add CEE dcb application data to app list
1768  *
1769  * Priority 0 is an invalid priority in CEE spec. This routine
1770  * removes applications from the app list if the priority is
1771  * set to zero.
1772  */
1773 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1774 {
1775         struct dcb_app_type *itr;
1776         struct dcb_app_type event;
1777         int err = 0;
1778
1779         event.ifindex = dev->ifindex;
1780         memcpy(&event.app, new, sizeof(event.app));
1781         if (dev->dcbnl_ops->getdcbx)
1782                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1783
1784         spin_lock(&dcb_lock);
1785         /* Search for existing match and replace */
1786         if ((itr = dcb_app_lookup(new, dev->ifindex, 0))) {
1787                 if (new->priority)
1788                         itr->app.priority = new->priority;
1789                 else {
1790                         list_del(&itr->list);
1791                         kfree(itr);
1792                 }
1793                 goto out;
1794         }
1795         /* App type does not exist add new application type */
1796         if (new->priority)
1797                 err = dcb_app_add(new, dev->ifindex);
1798 out:
1799         spin_unlock(&dcb_lock);
1800         if (!err)
1801                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1802         return err;
1803 }
1804 EXPORT_SYMBOL(dcb_setapp);
1805
1806 /**
1807  * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1808  *
1809  * Helper routine which on success returns a non-zero 802.1Qaz user
1810  * priority bitmap otherwise returns 0 to indicate the dcb_app was
1811  * not found in APP list.
1812  */
1813 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1814 {
1815         struct dcb_app_type *itr;
1816         u8 prio = 0;
1817
1818         spin_lock(&dcb_lock);
1819         if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
1820                 prio |= 1 << itr->app.priority;
1821         spin_unlock(&dcb_lock);
1822
1823         return prio;
1824 }
1825 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1826
1827 /**
1828  * dcb_ieee_setapp - add IEEE dcb application data to app list
1829  *
1830  * This adds Application data to the list. Multiple application
1831  * entries may exists for the same selector and protocol as long
1832  * as the priorities are different.
1833  */
1834 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1835 {
1836         struct dcb_app_type event;
1837         int err = 0;
1838
1839         event.ifindex = dev->ifindex;
1840         memcpy(&event.app, new, sizeof(event.app));
1841         if (dev->dcbnl_ops->getdcbx)
1842                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1843
1844         spin_lock(&dcb_lock);
1845         /* Search for existing match and abort if found */
1846         if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1847                 err = -EEXIST;
1848                 goto out;
1849         }
1850
1851         err = dcb_app_add(new, dev->ifindex);
1852 out:
1853         spin_unlock(&dcb_lock);
1854         if (!err)
1855                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1856         return err;
1857 }
1858 EXPORT_SYMBOL(dcb_ieee_setapp);
1859
1860 /**
1861  * dcb_ieee_delapp - delete IEEE dcb application data from list
1862  *
1863  * This removes a matching APP data from the APP list
1864  */
1865 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1866 {
1867         struct dcb_app_type *itr;
1868         struct dcb_app_type event;
1869         int err = -ENOENT;
1870
1871         event.ifindex = dev->ifindex;
1872         memcpy(&event.app, del, sizeof(event.app));
1873         if (dev->dcbnl_ops->getdcbx)
1874                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1875
1876         spin_lock(&dcb_lock);
1877         /* Search for existing match and remove it. */
1878         if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1879                 list_del(&itr->list);
1880                 kfree(itr);
1881                 err = 0;
1882         }
1883
1884         spin_unlock(&dcb_lock);
1885         if (!err)
1886                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1887         return err;
1888 }
1889 EXPORT_SYMBOL(dcb_ieee_delapp);
1890
1891 static void dcb_flushapp(void)
1892 {
1893         struct dcb_app_type *app;
1894         struct dcb_app_type *tmp;
1895
1896         spin_lock(&dcb_lock);
1897         list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
1898                 list_del(&app->list);
1899                 kfree(app);
1900         }
1901         spin_unlock(&dcb_lock);
1902 }
1903
1904 static int __init dcbnl_init(void)
1905 {
1906         INIT_LIST_HEAD(&dcb_app_list);
1907
1908         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
1909         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);
1910
1911         return 0;
1912 }
1913 module_init(dcbnl_init);
1914
1915 static void __exit dcbnl_exit(void)
1916 {
1917         rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
1918         rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
1919         dcb_flushapp();
1920 }
1921 module_exit(dcbnl_exit);