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