net/dcb/dcbnl.c

   1 /*
   2  * Copyright (c) 2008-2011, Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, see <http://www.gnu.org/licenses/>.
  15  *
  16  * Description: Data Center Bridging netlink interface
  17  * Author: Lucy Liu <lucy.liu@intel.com>
  18  */
  19
  20 #include <linux/netdevice.h>
  21 #include <linux/netlink.h>
  22 #include <linux/slab.h>
  23 #include <net/netlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <linux/dcbnl.h>
  26 #include <net/dcbevent.h>
  27 #include <linux/rtnetlink.h>
  28 #include <linux/init.h>
  29 #include <net/sock.h>
  30
  31 /* Data Center Bridging (DCB) is a collection of Ethernet enhancements
  32  * intended to allow network traffic with differing requirements
  33  * (highly reliable, no drops vs. best effort vs. low latency) to operate
  34  * and co-exist on Ethernet.  Current DCB features are:
  35  *
  36  * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
  37  *   framework for assigning bandwidth guarantees to traffic classes.
  38  *
  39  * Priority-based Flow Control (PFC) - provides a flow control mechanism which
  40  *   can work independently for each 802.1p priority.
  41  *
  42  * Congestion Notification - provides a mechanism for end-to-end congestion
  43  *   control for protocols which do not have built-in congestion management.
  44  *
  45  * More information about the emerging standards for these Ethernet features
  46  * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
  47  *
  48  * This file implements an rtnetlink interface to allow configuration of DCB
  49  * features for capable devices.
  50  */
  51
  52 /**************** DCB attribute policies *************************************/
  53
  54 /* DCB netlink attributes policy */
  55 static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
  56         [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  57         [DCB_ATTR_STATE]       = {.type = NLA_U8},
  58         [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  59         [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  60         [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
  61         [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
  62         [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  63         [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  64         [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
  65         [DCB_ATTR_APP]         = {.type = NLA_NESTED},
  66         [DCB_ATTR_IEEE]        = {.type = NLA_NESTED},
  67         [DCB_ATTR_DCBX]        = {.type = NLA_U8},
  68         [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
  69 };
  70
  71 /* DCB priority flow control to User Priority nested attributes */
  72 static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
  73         [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  74         [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  75         [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  76         [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  77         [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  78         [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  79         [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  80         [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  81         [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  82 };
  83
  84 /* DCB priority grouping nested attributes */
  85 static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
  86         [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  87         [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  88         [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  89         [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  90         [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  91         [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  92         [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  93         [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  94         [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  95         [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
  96         [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
  97         [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
  98         [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
  99         [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
 100         [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
 101         [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
 102         [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
 103         [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
 104 };
 105
 106 /* DCB traffic class nested attributes. */
 107 static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
 108         [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
 109         [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
 110         [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
 111         [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
 112         [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
 113 };
 114
 115 /* DCB capabilities nested attributes. */
 116 static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
 117         [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
 118         [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
 119         [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
 120         [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
 121         [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
 122         [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
 123         [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
 124         [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
 125         [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
 126 };
 127
 128 /* DCB capabilities nested attributes. */
 129 static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
 130         [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
 131         [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
 132         [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
 133 };
 134
 135 /* DCB BCN nested attributes. */
 136 static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
 137         [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
 138         [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
 139         [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
 140         [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
 141         [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
 142         [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
 143         [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
 144         [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
 145         [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
 146         [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
 147         [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
 148         [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
 149         [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
 150         [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
 151         [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
 152         [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
 153         [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
 154         [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
 155         [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
 156         [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
 157         [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
 158         [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
 159         [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
 160         [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
 161         [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
 162 };
 163
 164 /* DCB APP nested attributes. */
 165 static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
 166         [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
 167         [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
 168         [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
 169 };
 170
 171 /* IEEE 802.1Qaz nested attributes. */
 172 static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
 173         [DCB_ATTR_IEEE_ETS]         = {.len = sizeof(struct ieee_ets)},
 174         [DCB_ATTR_IEEE_PFC]         = {.len = sizeof(struct ieee_pfc)},
 175         [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
 176         [DCB_ATTR_IEEE_MAXRATE]   = {.len = sizeof(struct ieee_maxrate)},
 177         [DCB_ATTR_IEEE_QCN]         = {.len = sizeof(struct ieee_qcn)},
 178         [DCB_ATTR_IEEE_QCN_STATS]   = {.len = sizeof(struct ieee_qcn_stats)},
 179         [DCB_ATTR_DCB_BUFFER]       = {.len = sizeof(struct dcbnl_buffer)},
 180 };
 181
 182 /* DCB number of traffic classes nested attributes. */
 183 static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
 184         [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
 185         [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
 186         [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
 187         [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
 188 };
 189
 190 static LIST_HEAD(dcb_app_list);
 191 static DEFINE_SPINLOCK(dcb_lock);
 192
 193 static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
 194                                     u32 flags, struct nlmsghdr **nlhp)
 195 {
 196         struct sk_buff *skb;
 197         struct dcbmsg *dcb;
 198         struct nlmsghdr *nlh;
 199
 200         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 201         if (!skb)
 202                 return NULL;
 203
 204         nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
 205         BUG_ON(!nlh);
 206
 207         dcb = nlmsg_data(nlh);
 208         dcb->dcb_family = AF_UNSPEC;
 209         dcb->cmd = cmd;
 210         dcb->dcb_pad = 0;
 211
 212         if (nlhp)
 213                 *nlhp = nlh;
 214
 215         return skb;
 216 }
 217
 218 static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
 219                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 220 {
 221         /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
 222         if (!netdev->dcbnl_ops->getstate)
 223                 return -EOPNOTSUPP;
 224
 225         return nla_put_u8(skb, DCB_ATTR_STATE,
 226                           netdev->dcbnl_ops->getstate(netdev));
 227 }
 228
 229 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 230                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 231 {
 232         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
 233         u8 value;
 234         int ret;
 235         int i;
 236         int getall = 0;
 237
 238         if (!tb[DCB_ATTR_PFC_CFG])
 239                 return -EINVAL;
 240
 241         if (!netdev->dcbnl_ops->getpfccfg)
 242                 return -EOPNOTSUPP;
 243
 244         ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
 245                                           tb[DCB_ATTR_PFC_CFG],
 246                                           dcbnl_pfc_up_nest, NULL);
 247         if (ret)
 248                 return ret;
 249
 250         nest = nla_nest_start_noflag(skb, DCB_ATTR_PFC_CFG);
 251         if (!nest)
 252                 return -EMSGSIZE;
 253
 254         if (data[DCB_PFC_UP_ATTR_ALL])
 255                 getall = 1;
 256
 257         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 258                 if (!getall && !data[i])
 259                         continue;
 260
 261                 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
 262                                              &value);
 263                 ret = nla_put_u8(skb, i, value);
 264                 if (ret) {
 265                         nla_nest_cancel(skb, nest);
 266                         return ret;
 267                 }
 268         }
 269         nla_nest_end(skb, nest);
 270
 271         return 0;
 272 }
 273
 274 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
 275                                 u32 seq, struct nlattr **tb, struct sk_buff *skb)
 276 {
 277         u8 perm_addr[MAX_ADDR_LEN];
 278
 279         if (!netdev->dcbnl_ops->getpermhwaddr)
 280                 return -EOPNOTSUPP;
 281
 282         memset(perm_addr, 0, sizeof(perm_addr));
 283         netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
 284
 285         return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
 286 }
 287
 288 static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
 289                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 290 {
 291         struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
 292         u8 value;
 293         int ret;
 294         int i;
 295         int getall = 0;
 296
 297         if (!tb[DCB_ATTR_CAP])
 298                 return -EINVAL;
 299
 300         if (!netdev->dcbnl_ops->getcap)
 301                 return -EOPNOTSUPP;
 302
 303         ret = nla_parse_nested_deprecated(data, DCB_CAP_ATTR_MAX,
 304                                           tb[DCB_ATTR_CAP], dcbnl_cap_nest,
 305                                           NULL);
 306         if (ret)
 307                 return ret;
 308
 309         nest = nla_nest_start_noflag(skb, DCB_ATTR_CAP);
 310         if (!nest)
 311                 return -EMSGSIZE;
 312
 313         if (data[DCB_CAP_ATTR_ALL])
 314                 getall = 1;
 315
 316         for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
 317                 if (!getall && !data[i])
 318                         continue;
 319
 320                 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
 321                         ret = nla_put_u8(skb, i, value);
 322                         if (ret) {
 323                                 nla_nest_cancel(skb, nest);
 324                                 return ret;
 325                         }
 326                 }
 327         }
 328         nla_nest_end(skb, nest);
 329
 330         return 0;
 331 }
 332
 333 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
 334                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 335 {
 336         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
 337         u8 value;
 338         int ret;
 339         int i;
 340         int getall = 0;
 341
 342         if (!tb[DCB_ATTR_NUMTCS])
 343                 return -EINVAL;
 344
 345         if (!netdev->dcbnl_ops->getnumtcs)
 346                 return -EOPNOTSUPP;
 347
 348         ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
 349                                           tb[DCB_ATTR_NUMTCS],
 350                                           dcbnl_numtcs_nest, NULL);
 351         if (ret)
 352                 return ret;
 353
 354         nest = nla_nest_start_noflag(skb, DCB_ATTR_NUMTCS);
 355         if (!nest)
 356                 return -EMSGSIZE;
 357
 358         if (data[DCB_NUMTCS_ATTR_ALL])
 359                 getall = 1;
 360
 361         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 362                 if (!getall && !data[i])
 363                         continue;
 364
 365                 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
 366                 if (!ret) {
 367                         ret = nla_put_u8(skb, i, value);
 368                         if (ret) {
 369                                 nla_nest_cancel(skb, nest);
 370                                 return ret;
 371                         }
 372                 } else
 373                         return -EINVAL;
 374         }
 375         nla_nest_end(skb, nest);
 376
 377         return 0;
 378 }
 379
 380 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
 381                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 382 {
 383         struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
 384         int ret;
 385         u8 value;
 386         int i;
 387
 388         if (!tb[DCB_ATTR_NUMTCS])
 389                 return -EINVAL;
 390
 391         if (!netdev->dcbnl_ops->setnumtcs)
 392                 return -EOPNOTSUPP;
 393
 394         ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
 395                                           tb[DCB_ATTR_NUMTCS],
 396                                           dcbnl_numtcs_nest, NULL);
 397         if (ret)
 398                 return ret;
 399
 400         for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
 401                 if (data[i] == NULL)
 402                         continue;
 403
 404                 value = nla_get_u8(data[i]);
 405
 406                 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
 407                 if (ret)
 408                         break;
 409         }
 410
 411         return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
 412 }
 413
 414 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
 415                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 416 {
 417         if (!netdev->dcbnl_ops->getpfcstate)
 418                 return -EOPNOTSUPP;
 419
 420         return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
 421                           netdev->dcbnl_ops->getpfcstate(netdev));
 422 }
 423
 424 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
 425                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 426 {
 427         u8 value;
 428
 429         if (!tb[DCB_ATTR_PFC_STATE])
 430                 return -EINVAL;
 431
 432         if (!netdev->dcbnl_ops->setpfcstate)
 433                 return -EOPNOTSUPP;
 434
 435         value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
 436
 437         netdev->dcbnl_ops->setpfcstate(netdev, value);
 438
 439         return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
 440 }
 441
 442 static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
 443                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 444 {
 445         struct nlattr *app_nest;
 446         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 447         u16 id;
 448         u8 up, idtype;
 449         int ret;
 450
 451         if (!tb[DCB_ATTR_APP])
 452                 return -EINVAL;
 453
 454         ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
 455                                           tb[DCB_ATTR_APP], dcbnl_app_nest,
 456                                           NULL);
 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                 ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
 475                 if (ret < 0)
 476                         return ret;
 477                 else
 478                         up = ret;
 479         } else {
 480                 struct dcb_app app = {
 481                                         .selector = idtype,
 482                                         .protocol = id,
 483                                      };
 484                 up = dcb_getapp(netdev, &app);
 485         }
 486
 487         app_nest = nla_nest_start_noflag(skb, DCB_ATTR_APP);
 488         if (!app_nest)
 489                 return -EMSGSIZE;
 490
 491         ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
 492         if (ret)
 493                 goto out_cancel;
 494
 495         ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
 496         if (ret)
 497                 goto out_cancel;
 498
 499         ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
 500         if (ret)
 501                 goto out_cancel;
 502
 503         nla_nest_end(skb, app_nest);
 504
 505         return 0;
 506
 507 out_cancel:
 508         nla_nest_cancel(skb, app_nest);
 509         return ret;
 510 }
 511
 512 static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
 513                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 514 {
 515         int ret;
 516         u16 id;
 517         u8 up, idtype;
 518         struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
 519
 520         if (!tb[DCB_ATTR_APP])
 521                 return -EINVAL;
 522
 523         ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
 524                                           tb[DCB_ATTR_APP], dcbnl_app_nest,
 525                                           NULL);
 526         if (ret)
 527                 return ret;
 528
 529         /* all must be non-null */
 530         if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
 531             (!app_tb[DCB_APP_ATTR_ID]) ||
 532             (!app_tb[DCB_APP_ATTR_PRIORITY]))
 533                 return -EINVAL;
 534
 535         /* either by eth type or by socket number */
 536         idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
 537         if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
 538             (idtype != DCB_APP_IDTYPE_PORTNUM))
 539                 return -EINVAL;
 540
 541         id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
 542         up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);
 543
 544         if (netdev->dcbnl_ops->setapp) {
 545                 ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
 546                 if (ret < 0)
 547                         return ret;
 548         } else {
 549                 struct dcb_app app;
 550                 app.selector = idtype;
 551                 app.protocol = id;
 552                 app.priority = up;
 553                 ret = dcb_setapp(netdev, &app);
 554         }
 555
 556         ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
 557         dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
 558
 559         return ret;
 560 }
 561
 562 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 563                              struct nlattr **tb, struct sk_buff *skb, int dir)
 564 {
 565         struct nlattr *pg_nest, *param_nest, *data;
 566         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 567         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 568         u8 prio, pgid, tc_pct, up_map;
 569         int ret;
 570         int getall = 0;
 571         int i;
 572
 573         if (!tb[DCB_ATTR_PG_CFG])
 574                 return -EINVAL;
 575
 576         if (!netdev->dcbnl_ops->getpgtccfgtx ||
 577             !netdev->dcbnl_ops->getpgtccfgrx ||
 578             !netdev->dcbnl_ops->getpgbwgcfgtx ||
 579             !netdev->dcbnl_ops->getpgbwgcfgrx)
 580                 return -EOPNOTSUPP;
 581
 582         ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
 583                                           tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
 584                                           NULL);
 585         if (ret)
 586                 return ret;
 587
 588         pg_nest = nla_nest_start_noflag(skb, DCB_ATTR_PG_CFG);
 589         if (!pg_nest)
 590                 return -EMSGSIZE;
 591
 592         if (pg_tb[DCB_PG_ATTR_TC_ALL])
 593                 getall = 1;
 594
 595         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 596                 if (!getall && !pg_tb[i])
 597                         continue;
 598
 599                 if (pg_tb[DCB_PG_ATTR_TC_ALL])
 600                         data = pg_tb[DCB_PG_ATTR_TC_ALL];
 601                 else
 602                         data = pg_tb[i];
 603                 ret = nla_parse_nested_deprecated(param_tb,
 604                                                   DCB_TC_ATTR_PARAM_MAX, data,
 605                                                   dcbnl_tc_param_nest, NULL);
 606                 if (ret)
 607                         goto err_pg;
 608
 609                 param_nest = nla_nest_start_noflag(skb, i);
 610                 if (!param_nest)
 611                         goto err_pg;
 612
 613                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 614                 prio = DCB_ATTR_VALUE_UNDEFINED;
 615                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 616                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 617
 618                 if (dir) {
 619                         /* Rx */
 620                         netdev->dcbnl_ops->getpgtccfgrx(netdev,
 621                                                 i - DCB_PG_ATTR_TC_0, &prio,
 622                                                 &pgid, &tc_pct, &up_map);
 623                 } else {
 624                         /* Tx */
 625                         netdev->dcbnl_ops->getpgtccfgtx(netdev,
 626                                                 i - DCB_PG_ATTR_TC_0, &prio,
 627                                                 &pgid, &tc_pct, &up_map);
 628                 }
 629
 630                 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
 631                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 632                         ret = nla_put_u8(skb,
 633                                          DCB_TC_ATTR_PARAM_PGID, pgid);
 634                         if (ret)
 635                                 goto err_param;
 636                 }
 637                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
 638                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 639                         ret = nla_put_u8(skb,
 640                                          DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
 641                         if (ret)
 642                                 goto err_param;
 643                 }
 644                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
 645                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 646                         ret = nla_put_u8(skb,
 647                                          DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
 648                         if (ret)
 649                                 goto err_param;
 650                 }
 651                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
 652                     param_tb[DCB_TC_ATTR_PARAM_ALL]) {
 653                         ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
 654                                          tc_pct);
 655                         if (ret)
 656                                 goto err_param;
 657                 }
 658                 nla_nest_end(skb, param_nest);
 659         }
 660
 661         if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
 662                 getall = 1;
 663         else
 664                 getall = 0;
 665
 666         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 667                 if (!getall && !pg_tb[i])
 668                         continue;
 669
 670                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 671
 672                 if (dir) {
 673                         /* Rx */
 674                         netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
 675                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 676                 } else {
 677                         /* Tx */
 678                         netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
 679                                         i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
 680                 }
 681                 ret = nla_put_u8(skb, i, tc_pct);
 682                 if (ret)
 683                         goto err_pg;
 684         }
 685
 686         nla_nest_end(skb, pg_nest);
 687
 688         return 0;
 689
 690 err_param:
 691         nla_nest_cancel(skb, param_nest);
 692 err_pg:
 693         nla_nest_cancel(skb, pg_nest);
 694
 695         return -EMSGSIZE;
 696 }
 697
 698 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 699                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 700 {
 701         return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
 702 }
 703
 704 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 705                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 706 {
 707         return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
 708 }
 709
 710 static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
 711                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
 712 {
 713         u8 value;
 714
 715         if (!tb[DCB_ATTR_STATE])
 716                 return -EINVAL;
 717
 718         if (!netdev->dcbnl_ops->setstate)
 719                 return -EOPNOTSUPP;
 720
 721         value = nla_get_u8(tb[DCB_ATTR_STATE]);
 722
 723         return nla_put_u8(skb, DCB_ATTR_STATE,
 724                           netdev->dcbnl_ops->setstate(netdev, value));
 725 }
 726
 727 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
 728                            u32 seq, struct nlattr **tb, struct sk_buff *skb)
 729 {
 730         struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
 731         int i;
 732         int ret;
 733         u8 value;
 734
 735         if (!tb[DCB_ATTR_PFC_CFG])
 736                 return -EINVAL;
 737
 738         if (!netdev->dcbnl_ops->setpfccfg)
 739                 return -EOPNOTSUPP;
 740
 741         ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
 742                                           tb[DCB_ATTR_PFC_CFG],
 743                                           dcbnl_pfc_up_nest, NULL);
 744         if (ret)
 745                 return ret;
 746
 747         for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
 748                 if (data[i] == NULL)
 749                         continue;
 750                 value = nla_get_u8(data[i]);
 751                 netdev->dcbnl_ops->setpfccfg(netdev,
 752                         data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
 753         }
 754
 755         return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
 756 }
 757
 758 static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
 759                         u32 seq, struct nlattr **tb, struct sk_buff *skb)
 760 {
 761         int ret;
 762
 763         if (!tb[DCB_ATTR_SET_ALL])
 764                 return -EINVAL;
 765
 766         if (!netdev->dcbnl_ops->setall)
 767                 return -EOPNOTSUPP;
 768
 769         ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
 770                          netdev->dcbnl_ops->setall(netdev));
 771         dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
 772
 773         return ret;
 774 }
 775
 776 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 777                              u32 seq, struct nlattr **tb, struct sk_buff *skb,
 778                              int dir)
 779 {
 780         struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
 781         struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
 782         int ret;
 783         int i;
 784         u8 pgid;
 785         u8 up_map;
 786         u8 prio;
 787         u8 tc_pct;
 788
 789         if (!tb[DCB_ATTR_PG_CFG])
 790                 return -EINVAL;
 791
 792         if (!netdev->dcbnl_ops->setpgtccfgtx ||
 793             !netdev->dcbnl_ops->setpgtccfgrx ||
 794             !netdev->dcbnl_ops->setpgbwgcfgtx ||
 795             !netdev->dcbnl_ops->setpgbwgcfgrx)
 796                 return -EOPNOTSUPP;
 797
 798         ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
 799                                           tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
 800                                           NULL);
 801         if (ret)
 802                 return ret;
 803
 804         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
 805                 if (!pg_tb[i])
 806                         continue;
 807
 808                 ret = nla_parse_nested_deprecated(param_tb,
 809                                                   DCB_TC_ATTR_PARAM_MAX,
 810                                                   pg_tb[i],
 811                                                   dcbnl_tc_param_nest, NULL);
 812                 if (ret)
 813                         return ret;
 814
 815                 pgid = DCB_ATTR_VALUE_UNDEFINED;
 816                 prio = DCB_ATTR_VALUE_UNDEFINED;
 817                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
 818                 up_map = DCB_ATTR_VALUE_UNDEFINED;
 819
 820                 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
 821                         prio =
 822                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
 823
 824                 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
 825                         pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
 826
 827                 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
 828                         tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
 829
 830                 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
 831                         up_map =
 832                              nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
 833
 834                 /* dir: Tx = 0, Rx = 1 */
 835                 if (dir) {
 836                         /* Rx */
 837                         netdev->dcbnl_ops->setpgtccfgrx(netdev,
 838                                 i - DCB_PG_ATTR_TC_0,
 839                                 prio, pgid, tc_pct, up_map);
 840                 } else {
 841                         /* Tx */
 842                         netdev->dcbnl_ops->setpgtccfgtx(netdev,
 843                                 i - DCB_PG_ATTR_TC_0,
 844                                 prio, pgid, tc_pct, up_map);
 845                 }
 846         }
 847
 848         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
 849                 if (!pg_tb[i])
 850                         continue;
 851
 852                 tc_pct = nla_get_u8(pg_tb[i]);
 853
 854                 /* dir: Tx = 0, Rx = 1 */
 855                 if (dir) {
 856                         /* Rx */
 857                         netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
 858                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 859                 } else {
 860                         /* Tx */
 861                         netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
 862                                          i - DCB_PG_ATTR_BW_ID_0, tc_pct);
 863                 }
 864         }
 865
 866         return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
 867 }
 868
 869 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 870                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 871 {
 872         return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
 873 }
 874
 875 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 876                              u32 seq, struct nlattr **tb, struct sk_buff *skb)
 877 {
 878         return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
 879 }
 880
 881 static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 882                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
 883 {
 884         struct nlattr *bcn_nest;
 885         struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
 886         u8 value_byte;
 887         u32 value_integer;
 888         int ret;
 889         bool getall = false;
 890         int i;
 891
 892         if (!tb[DCB_ATTR_BCN])
 893                 return -EINVAL;
 894
 895         if (!netdev->dcbnl_ops->getbcnrp ||
 896             !netdev->dcbnl_ops->getbcncfg)
 897                 return -EOPNOTSUPP;
 898
 899         ret = nla_parse_nested_deprecated(bcn_tb, DCB_BCN_ATTR_MAX,
 900                                           tb[DCB_ATTR_BCN], dcbnl_bcn_nest,
 901                                           NULL);
 902         if (ret)
 903                 return ret;
 904
 905         bcn_nest = nla_nest_start_noflag(skb, DCB_ATTR_BCN);
 906         if (!bcn_nest)
 907                 return -EMSGSIZE;
 908
 909         if (bcn_tb[DCB_BCN_ATTR_ALL])
 910                 getall = true;
 911
 912         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 913                 if (!getall && !bcn_tb[i])
 914                         continue;
 915
 916                 netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
 917                                             &value_byte);
 918                 ret = nla_put_u8(skb, i, value_byte);
 919                 if (ret)
 920                         goto err_bcn;
 921         }
 922
 923         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
 924                 if (!getall && !bcn_tb[i])
 925                         continue;
 926
 927                 netdev->dcbnl_ops->getbcncfg(netdev, i,
 928                                              &value_integer);
 929                 ret = nla_put_u32(skb, i, value_integer);
 930                 if (ret)
 931                         goto err_bcn;
 932         }
 933
 934         nla_nest_end(skb, bcn_nest);
 935
 936         return 0;
 937
 938 err_bcn:
 939         nla_nest_cancel(skb, bcn_nest);
 940         return ret;
 941 }
 942
 943 static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
 944                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
 945 {
 946         struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
 947         int i;
 948         int ret;
 949         u8 value_byte;
 950         u32 value_int;
 951
 952         if (!tb[DCB_ATTR_BCN])
 953                 return -EINVAL;
 954
 955         if (!netdev->dcbnl_ops->setbcncfg ||
 956             !netdev->dcbnl_ops->setbcnrp)
 957                 return -EOPNOTSUPP;
 958
 959         ret = nla_parse_nested_deprecated(data, DCB_BCN_ATTR_MAX,
 960                                           tb[DCB_ATTR_BCN], dcbnl_pfc_up_nest,
 961                                           NULL);
 962         if (ret)
 963                 return ret;
 964
 965         for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
 966                 if (data[i] == NULL)
 967                         continue;
 968                 value_byte = nla_get_u8(data[i]);
 969                 netdev->dcbnl_ops->setbcnrp(netdev,
 970                         data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
 971         }
 972
 973         for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {
 974                 if (data[i] == NULL)
 975                         continue;
 976                 value_int = nla_get_u32(data[i]);
 977                 netdev->dcbnl_ops->setbcncfg(netdev,
 978                                              i, value_int);
 979         }
 980
 981         return nla_put_u8(skb, DCB_ATTR_BCN, 0);
 982 }
 983
 984 static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
 985                                 int app_nested_type, int app_info_type,
 986                                 int app_entry_type)
 987 {
 988         struct dcb_peer_app_info info;
 989         struct dcb_app *table = NULL;
 990         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
 991         u16 app_count;
 992         int err;
 993
 994
 995         /**
 996          * retrieve the peer app configuration form the driver. If the driver
 997          * handlers fail exit without doing anything
 998          */
 999         err = ops->peer_getappinfo(netdev, &info, &app_count);
1000         if (!err && app_count) {
1001                 table = kmalloc_array(app_count, sizeof(struct dcb_app),
1002                                       GFP_KERNEL);
1003                 if (!table)
1004                         return -ENOMEM;
1005
1006                 err = ops->peer_getapptable(netdev, table);
1007         }
1008
1009         if (!err) {
1010                 u16 i;
1011                 struct nlattr *app;
1012
1013                 /**
1014                  * build the message, from here on the only possible failure
1015                  * is due to the skb size
1016                  */
1017                 err = -EMSGSIZE;
1018
1019                 app = nla_nest_start_noflag(skb, app_nested_type);
1020                 if (!app)
1021                         goto nla_put_failure;
1022
1023                 if (app_info_type &&
1024                     nla_put(skb, app_info_type, sizeof(info), &info))
1025                         goto nla_put_failure;
1026
1027                 for (i = 0; i < app_count; i++) {
1028                         if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
1029                                     &table[i]))
1030                                 goto nla_put_failure;
1031                 }
1032                 nla_nest_end(skb, app);
1033         }
1034         err = 0;
1035
1036 nla_put_failure:
1037         kfree(table);
1038         return err;
1039 }
1040
1041 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb GET commands. */
1042 static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
1043 {
1044         struct nlattr *ieee, *app;
1045         struct dcb_app_type *itr;
1046         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1047         int dcbx;
1048         int err;
1049
1050         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1051                 return -EMSGSIZE;
1052
1053         ieee = nla_nest_start_noflag(skb, DCB_ATTR_IEEE);
1054         if (!ieee)
1055                 return -EMSGSIZE;
1056
1057         if (ops->ieee_getets) {
1058                 struct ieee_ets ets;
1059                 memset(&ets, 0, sizeof(ets));
1060                 err = ops->ieee_getets(netdev, &ets);
1061                 if (!err &&
1062                     nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
1063                         return -EMSGSIZE;
1064         }
1065
1066         if (ops->ieee_getmaxrate) {
1067                 struct ieee_maxrate maxrate;
1068                 memset(&maxrate, 0, sizeof(maxrate));
1069                 err = ops->ieee_getmaxrate(netdev, &maxrate);
1070                 if (!err) {
1071                         err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
1072                                       sizeof(maxrate), &maxrate);
1073                         if (err)
1074                                 return -EMSGSIZE;
1075                 }
1076         }
1077
1078         if (ops->ieee_getqcn) {
1079                 struct ieee_qcn qcn;
1080
1081                 memset(&qcn, 0, sizeof(qcn));
1082                 err = ops->ieee_getqcn(netdev, &qcn);
1083                 if (!err) {
1084                         err = nla_put(skb, DCB_ATTR_IEEE_QCN,
1085                                       sizeof(qcn), &qcn);
1086                         if (err)
1087                                 return -EMSGSIZE;
1088                 }
1089         }
1090
1091         if (ops->ieee_getqcnstats) {
1092                 struct ieee_qcn_stats qcn_stats;
1093
1094                 memset(&qcn_stats, 0, sizeof(qcn_stats));
1095                 err = ops->ieee_getqcnstats(netdev, &qcn_stats);
1096                 if (!err) {
1097                         err = nla_put(skb, DCB_ATTR_IEEE_QCN_STATS,
1098                                       sizeof(qcn_stats), &qcn_stats);
1099                         if (err)
1100                                 return -EMSGSIZE;
1101                 }
1102         }
1103
1104         if (ops->ieee_getpfc) {
1105                 struct ieee_pfc pfc;
1106                 memset(&pfc, 0, sizeof(pfc));
1107                 err = ops->ieee_getpfc(netdev, &pfc);
1108                 if (!err &&
1109                     nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
1110                         return -EMSGSIZE;
1111         }
1112
1113         if (ops->dcbnl_getbuffer) {
1114                 struct dcbnl_buffer buffer;
1115
1116                 memset(&buffer, 0, sizeof(buffer));
1117                 err = ops->dcbnl_getbuffer(netdev, &buffer);
1118                 if (!err &&
1119                     nla_put(skb, DCB_ATTR_DCB_BUFFER, sizeof(buffer), &buffer))
1120                         return -EMSGSIZE;
1121         }
1122
1123         app = nla_nest_start_noflag(skb, DCB_ATTR_IEEE_APP_TABLE);
1124         if (!app)
1125                 return -EMSGSIZE;
1126
1127         spin_lock_bh(&dcb_lock);
1128         list_for_each_entry(itr, &dcb_app_list, list) {
1129                 if (itr->ifindex == netdev->ifindex) {
1130                         err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
1131                                          &itr->app);
1132                         if (err) {
1133                                 spin_unlock_bh(&dcb_lock);
1134                                 return -EMSGSIZE;
1135                         }
1136                 }
1137         }
1138
1139         if (netdev->dcbnl_ops->getdcbx)
1140                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1141         else
1142                 dcbx = -EOPNOTSUPP;
1143
1144         spin_unlock_bh(&dcb_lock);
1145         nla_nest_end(skb, app);
1146
1147         /* get peer info if available */
1148         if (ops->ieee_peer_getets) {
1149                 struct ieee_ets ets;
1150                 memset(&ets, 0, sizeof(ets));
1151                 err = ops->ieee_peer_getets(netdev, &ets);
1152                 if (!err &&
1153                     nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
1154                         return -EMSGSIZE;
1155         }
1156
1157         if (ops->ieee_peer_getpfc) {
1158                 struct ieee_pfc pfc;
1159                 memset(&pfc, 0, sizeof(pfc));
1160                 err = ops->ieee_peer_getpfc(netdev, &pfc);
1161                 if (!err &&
1162                     nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
1163                         return -EMSGSIZE;
1164         }
1165
1166         if (ops->peer_getappinfo && ops->peer_getapptable) {
1167                 err = dcbnl_build_peer_app(netdev, skb,
1168                                            DCB_ATTR_IEEE_PEER_APP,
1169                                            DCB_ATTR_IEEE_APP_UNSPEC,
1170                                            DCB_ATTR_IEEE_APP);
1171                 if (err)
1172                         return -EMSGSIZE;
1173         }
1174
1175         nla_nest_end(skb, ieee);
1176         if (dcbx >= 0) {
1177                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1178                 if (err)
1179                         return -EMSGSIZE;
1180         }
1181
1182         return 0;
1183 }
1184
1185 static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
1186                              int dir)
1187 {
1188         u8 pgid, up_map, prio, tc_pct;
1189         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1190         int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
1191         struct nlattr *pg = nla_nest_start_noflag(skb, i);
1192
1193         if (!pg)
1194                 return -EMSGSIZE;
1195
1196         for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
1197                 struct nlattr *tc_nest = nla_nest_start_noflag(skb, i);
1198
1199                 if (!tc_nest)
1200                         return -EMSGSIZE;
1201
1202                 pgid = DCB_ATTR_VALUE_UNDEFINED;
1203                 prio = DCB_ATTR_VALUE_UNDEFINED;
1204                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1205                 up_map = DCB_ATTR_VALUE_UNDEFINED;
1206
1207                 if (!dir)
1208                         ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
1209                                           &prio, &pgid, &tc_pct, &up_map);
1210                 else
1211                         ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
1212                                           &prio, &pgid, &tc_pct, &up_map);
1213
1214                 if (nla_put_u8(skb, DCB_TC_ATTR_PARAM_PGID, pgid) ||
1215                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map) ||
1216                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio) ||
1217                     nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct))
1218                         return -EMSGSIZE;
1219                 nla_nest_end(skb, tc_nest);
1220         }
1221
1222         for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
1223                 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
1224
1225                 if (!dir)
1226                         ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
1227                                            &tc_pct);
1228                 else
1229                         ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
1230                                            &tc_pct);
1231                 if (nla_put_u8(skb, i, tc_pct))
1232                         return -EMSGSIZE;
1233         }
1234         nla_nest_end(skb, pg);
1235         return 0;
1236 }
1237
1238 static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
1239 {
1240         struct nlattr *cee, *app;
1241         struct dcb_app_type *itr;
1242         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1243         int dcbx, i, err = -EMSGSIZE;
1244         u8 value;
1245
1246         if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
1247                 goto nla_put_failure;
1248         cee = nla_nest_start_noflag(skb, DCB_ATTR_CEE);
1249         if (!cee)
1250                 goto nla_put_failure;
1251
1252         /* local pg */
1253         if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
1254                 err = dcbnl_cee_pg_fill(skb, netdev, 1);
1255                 if (err)
1256                         goto nla_put_failure;
1257         }
1258
1259         if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
1260                 err = dcbnl_cee_pg_fill(skb, netdev, 0);
1261                 if (err)
1262                         goto nla_put_failure;
1263         }
1264
1265         /* local pfc */
1266         if (ops->getpfccfg) {
1267                 struct nlattr *pfc_nest = nla_nest_start_noflag(skb,
1268                                                                 DCB_ATTR_CEE_PFC);
1269
1270                 if (!pfc_nest)
1271                         goto nla_put_failure;
1272
1273                 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
1274                         ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
1275                         if (nla_put_u8(skb, i, value))
1276                                 goto nla_put_failure;
1277                 }
1278                 nla_nest_end(skb, pfc_nest);
1279         }
1280
1281         /* local app */
1282         spin_lock_bh(&dcb_lock);
1283         app = nla_nest_start_noflag(skb, DCB_ATTR_CEE_APP_TABLE);
1284         if (!app)
1285                 goto dcb_unlock;
1286
1287         list_for_each_entry(itr, &dcb_app_list, list) {
1288                 if (itr->ifindex == netdev->ifindex) {
1289                         struct nlattr *app_nest = nla_nest_start_noflag(skb,
1290                                                                         DCB_ATTR_APP);
1291                         if (!app_nest)
1292                                 goto dcb_unlock;
1293
1294                         err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
1295                                          itr->app.selector);
1296                         if (err)
1297                                 goto dcb_unlock;
1298
1299                         err = nla_put_u16(skb, DCB_APP_ATTR_ID,
1300                                           itr->app.protocol);
1301                         if (err)
1302                                 goto dcb_unlock;
1303
1304                         err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
1305                                          itr->app.priority);
1306                         if (err)
1307                                 goto dcb_unlock;
1308
1309                         nla_nest_end(skb, app_nest);
1310                 }
1311         }
1312         nla_nest_end(skb, app);
1313
1314         if (netdev->dcbnl_ops->getdcbx)
1315                 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
1316         else
1317                 dcbx = -EOPNOTSUPP;
1318
1319         spin_unlock_bh(&dcb_lock);
1320
1321         /* features flags */
1322         if (ops->getfeatcfg) {
1323                 struct nlattr *feat = nla_nest_start_noflag(skb,
1324                                                             DCB_ATTR_CEE_FEAT);
1325                 if (!feat)
1326                         goto nla_put_failure;
1327
1328                 for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
1329                      i++)
1330                         if (!ops->getfeatcfg(netdev, i, &value) &&
1331                             nla_put_u8(skb, i, value))
1332                                 goto nla_put_failure;
1333
1334                 nla_nest_end(skb, feat);
1335         }
1336
1337         /* peer info if available */
1338         if (ops->cee_peer_getpg) {
1339                 struct cee_pg pg;
1340                 memset(&pg, 0, sizeof(pg));
1341                 err = ops->cee_peer_getpg(netdev, &pg);
1342                 if (!err &&
1343                     nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
1344                         goto nla_put_failure;
1345         }
1346
1347         if (ops->cee_peer_getpfc) {
1348                 struct cee_pfc pfc;
1349                 memset(&pfc, 0, sizeof(pfc));
1350                 err = ops->cee_peer_getpfc(netdev, &pfc);
1351                 if (!err &&
1352                     nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
1353                         goto nla_put_failure;
1354         }
1355
1356         if (ops->peer_getappinfo && ops->peer_getapptable) {
1357                 err = dcbnl_build_peer_app(netdev, skb,
1358                                            DCB_ATTR_CEE_PEER_APP_TABLE,
1359                                            DCB_ATTR_CEE_PEER_APP_INFO,
1360                                            DCB_ATTR_CEE_PEER_APP);
1361                 if (err)
1362                         goto nla_put_failure;
1363         }
1364         nla_nest_end(skb, cee);
1365
1366         /* DCBX state */
1367         if (dcbx >= 0) {
1368                 err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
1369                 if (err)
1370                         goto nla_put_failure;
1371         }
1372         return 0;
1373
1374 dcb_unlock:
1375         spin_unlock_bh(&dcb_lock);
1376 nla_put_failure:
1377         err = -EMSGSIZE;
1378         return err;
1379 }
1380
1381 static int dcbnl_notify(struct net_device *dev, int event, int cmd,
1382                         u32 seq, u32 portid, int dcbx_ver)
1383 {
1384         struct net *net = dev_net(dev);
1385         struct sk_buff *skb;
1386         struct nlmsghdr *nlh;
1387         const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
1388         int err;
1389
1390         if (!ops)
1391                 return -EOPNOTSUPP;
1392
1393         skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
1394         if (!skb)
1395                 return -ENOBUFS;
1396
1397         if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
1398                 err = dcbnl_ieee_fill(skb, dev);
1399         else
1400                 err = dcbnl_cee_fill(skb, dev);
1401
1402         if (err < 0) {
1403                 /* Report error to broadcast listeners */
1404                 nlmsg_free(skb);
1405                 rtnl_set_sk_err(net, RTNLGRP_DCB, err);
1406         } else {
1407                 /* End nlmsg and notify broadcast listeners */
1408                 nlmsg_end(skb, nlh);
1409                 rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
1410         }
1411
1412         return err;
1413 }
1414
1415 int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
1416                       u32 seq, u32 portid)
1417 {
1418         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_IEEE);
1419 }
1420 EXPORT_SYMBOL(dcbnl_ieee_notify);
1421
1422 int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
1423                      u32 seq, u32 portid)
1424 {
1425         return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
1426 }
1427 EXPORT_SYMBOL(dcbnl_cee_notify);
1428
1429 /* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb SET commands.
1430  * If any requested operation can not be completed
1431  * the entire msg is aborted and error value is returned.
1432  * No attempt is made to reconcile the case where only part of the
1433  * cmd can be completed.
1434  */
1435 static int dcbnl_ieee_set(struct net_device *netdev, struct nlmsghdr *nlh,
1436                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1437 {
1438         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1439         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1440         int err;
1441
1442         if (!ops)
1443                 return -EOPNOTSUPP;
1444
1445         if (!tb[DCB_ATTR_IEEE])
1446                 return -EINVAL;
1447
1448         err = nla_parse_nested_deprecated(ieee, DCB_ATTR_IEEE_MAX,
1449                                           tb[DCB_ATTR_IEEE],
1450                                           dcbnl_ieee_policy, NULL);
1451         if (err)
1452                 return err;
1453
1454         if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
1455                 struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
1456                 err = ops->ieee_setets(netdev, ets);
1457                 if (err)
1458                         goto err;
1459         }
1460
1461         if (ieee[DCB_ATTR_IEEE_MAXRATE] && ops->ieee_setmaxrate) {
1462                 struct ieee_maxrate *maxrate =
1463                         nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
1464                 err = ops->ieee_setmaxrate(netdev, maxrate);
1465                 if (err)
1466                         goto err;
1467         }
1468
1469         if (ieee[DCB_ATTR_IEEE_QCN] && ops->ieee_setqcn) {
1470                 struct ieee_qcn *qcn =
1471                         nla_data(ieee[DCB_ATTR_IEEE_QCN]);
1472
1473                 err = ops->ieee_setqcn(netdev, qcn);
1474                 if (err)
1475                         goto err;
1476         }
1477
1478         if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
1479                 struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
1480                 err = ops->ieee_setpfc(netdev, pfc);
1481                 if (err)
1482                         goto err;
1483         }
1484
1485         if (ieee[DCB_ATTR_DCB_BUFFER] && ops->dcbnl_setbuffer) {
1486                 struct dcbnl_buffer *buffer =
1487                         nla_data(ieee[DCB_ATTR_DCB_BUFFER]);
1488
1489                 err = ops->dcbnl_setbuffer(netdev, buffer);
1490                 if (err)
1491                         goto err;
1492         }
1493
1494         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1495                 struct nlattr *attr;
1496                 int rem;
1497
1498                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1499                         struct dcb_app *app_data;
1500
1501                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1502                                 continue;
1503
1504                         if (nla_len(attr) < sizeof(struct dcb_app)) {
1505                                 err = -ERANGE;
1506                                 goto err;
1507                         }
1508
1509                         app_data = nla_data(attr);
1510                         if (ops->ieee_setapp)
1511                                 err = ops->ieee_setapp(netdev, app_data);
1512                         else
1513                                 err = dcb_ieee_setapp(netdev, app_data);
1514                         if (err)
1515                                 goto err;
1516                 }
1517         }
1518
1519 err:
1520         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1521         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
1522         return err;
1523 }
1524
1525 static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1526                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1527 {
1528         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1529
1530         if (!ops)
1531                 return -EOPNOTSUPP;
1532
1533         return dcbnl_ieee_fill(skb, netdev);
1534 }
1535
1536 static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
1537                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
1538 {
1539         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1540         struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
1541         int err;
1542
1543         if (!ops)
1544                 return -EOPNOTSUPP;
1545
1546         if (!tb[DCB_ATTR_IEEE])
1547                 return -EINVAL;
1548
1549         err = nla_parse_nested_deprecated(ieee, DCB_ATTR_IEEE_MAX,
1550                                           tb[DCB_ATTR_IEEE],
1551                                           dcbnl_ieee_policy, NULL);
1552         if (err)
1553                 return err;
1554
1555         if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
1556                 struct nlattr *attr;
1557                 int rem;
1558
1559                 nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
1560                         struct dcb_app *app_data;
1561
1562                         if (nla_type(attr) != DCB_ATTR_IEEE_APP)
1563                                 continue;
1564                         app_data = nla_data(attr);
1565                         if (ops->ieee_delapp)
1566                                 err = ops->ieee_delapp(netdev, app_data);
1567                         else
1568                                 err = dcb_ieee_delapp(netdev, app_data);
1569                         if (err)
1570                                 goto err;
1571                 }
1572         }
1573
1574 err:
1575         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
1576         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);
1577         return err;
1578 }
1579
1580
1581 /* DCBX configuration */
1582 static int dcbnl_getdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1583                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1584 {
1585         if (!netdev->dcbnl_ops->getdcbx)
1586                 return -EOPNOTSUPP;
1587
1588         return nla_put_u8(skb, DCB_ATTR_DCBX,
1589                           netdev->dcbnl_ops->getdcbx(netdev));
1590 }
1591
1592 static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
1593                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1594 {
1595         u8 value;
1596
1597         if (!netdev->dcbnl_ops->setdcbx)
1598                 return -EOPNOTSUPP;
1599
1600         if (!tb[DCB_ATTR_DCBX])
1601                 return -EINVAL;
1602
1603         value = nla_get_u8(tb[DCB_ATTR_DCBX]);
1604
1605         return nla_put_u8(skb, DCB_ATTR_DCBX,
1606                           netdev->dcbnl_ops->setdcbx(netdev, value));
1607 }
1608
1609 static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1610                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1611 {
1612         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
1613         u8 value;
1614         int ret, i;
1615         int getall = 0;
1616
1617         if (!netdev->dcbnl_ops->getfeatcfg)
1618                 return -EOPNOTSUPP;
1619
1620         if (!tb[DCB_ATTR_FEATCFG])
1621                 return -EINVAL;
1622
1623         ret = nla_parse_nested_deprecated(data, DCB_FEATCFG_ATTR_MAX,
1624                                           tb[DCB_ATTR_FEATCFG],
1625                                           dcbnl_featcfg_nest, NULL);
1626         if (ret)
1627                 return ret;
1628
1629         nest = nla_nest_start_noflag(skb, DCB_ATTR_FEATCFG);
1630         if (!nest)
1631                 return -EMSGSIZE;
1632
1633         if (data[DCB_FEATCFG_ATTR_ALL])
1634                 getall = 1;
1635
1636         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1637                 if (!getall && !data[i])
1638                         continue;
1639
1640                 ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);
1641                 if (!ret)
1642                         ret = nla_put_u8(skb, i, value);
1643
1644                 if (ret) {
1645                         nla_nest_cancel(skb, nest);
1646                         goto nla_put_failure;
1647                 }
1648         }
1649         nla_nest_end(skb, nest);
1650
1651 nla_put_failure:
1652         return ret;
1653 }
1654
1655 static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
1656                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
1657 {
1658         struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];
1659         int ret, i;
1660         u8 value;
1661
1662         if (!netdev->dcbnl_ops->setfeatcfg)
1663                 return -ENOTSUPP;
1664
1665         if (!tb[DCB_ATTR_FEATCFG])
1666                 return -EINVAL;
1667
1668         ret = nla_parse_nested_deprecated(data, DCB_FEATCFG_ATTR_MAX,
1669                                           tb[DCB_ATTR_FEATCFG],
1670                                           dcbnl_featcfg_nest, NULL);
1671
1672         if (ret)
1673                 goto err;
1674
1675         for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
1676                 if (data[i] == NULL)
1677                         continue;
1678
1679                 value = nla_get_u8(data[i]);
1680
1681                 ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
1682
1683                 if (ret)
1684                         goto err;
1685         }
1686 err:
1687         ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
1688
1689         return ret;
1690 }
1691
1692 /* Handle CEE DCBX GET commands. */
1693 static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
1694                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
1695 {
1696         const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
1697
1698         if (!ops)
1699                 return -EOPNOTSUPP;
1700
1701         return dcbnl_cee_fill(skb, netdev);
1702 }
1703
1704 struct reply_func {
1705         /* reply netlink message type */
1706         int     type;
1707
1708         /* function to fill message contents */
1709         int   (*cb)(struct net_device *, struct nlmsghdr *, u32,
1710                     struct nlattr **, struct sk_buff *);
1711 };
1712
1713 static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
1714         [DCB_CMD_GSTATE]        = { RTM_GETDCB, dcbnl_getstate },
1715         [DCB_CMD_SSTATE]        = { RTM_SETDCB, dcbnl_setstate },
1716         [DCB_CMD_PFC_GCFG]      = { RTM_GETDCB, dcbnl_getpfccfg },
1717         [DCB_CMD_PFC_SCFG]      = { RTM_SETDCB, dcbnl_setpfccfg },
1718         [DCB_CMD_GPERM_HWADDR]  = { RTM_GETDCB, dcbnl_getperm_hwaddr },
1719         [DCB_CMD_GCAP]          = { RTM_GETDCB, dcbnl_getcap },
1720         [DCB_CMD_GNUMTCS]       = { RTM_GETDCB, dcbnl_getnumtcs },
1721         [DCB_CMD_SNUMTCS]       = { RTM_SETDCB, dcbnl_setnumtcs },
1722         [DCB_CMD_PFC_GSTATE]    = { RTM_GETDCB, dcbnl_getpfcstate },
1723         [DCB_CMD_PFC_SSTATE]    = { RTM_SETDCB, dcbnl_setpfcstate },
1724         [DCB_CMD_GAPP]          = { RTM_GETDCB, dcbnl_getapp },
1725         [DCB_CMD_SAPP]          = { RTM_SETDCB, dcbnl_setapp },
1726         [DCB_CMD_PGTX_GCFG]     = { RTM_GETDCB, dcbnl_pgtx_getcfg },
1727         [DCB_CMD_PGTX_SCFG]     = { RTM_SETDCB, dcbnl_pgtx_setcfg },
1728         [DCB_CMD_PGRX_GCFG]     = { RTM_GETDCB, dcbnl_pgrx_getcfg },
1729         [DCB_CMD_PGRX_SCFG]     = { RTM_SETDCB, dcbnl_pgrx_setcfg },
1730         [DCB_CMD_SET_ALL]       = { RTM_SETDCB, dcbnl_setall },
1731         [DCB_CMD_BCN_GCFG]      = { RTM_GETDCB, dcbnl_bcn_getcfg },
1732         [DCB_CMD_BCN_SCFG]      = { RTM_SETDCB, dcbnl_bcn_setcfg },
1733         [DCB_CMD_IEEE_GET]      = { RTM_GETDCB, dcbnl_ieee_get },
1734         [DCB_CMD_IEEE_SET]      = { RTM_SETDCB, dcbnl_ieee_set },
1735         [DCB_CMD_IEEE_DEL]      = { RTM_SETDCB, dcbnl_ieee_del },
1736         [DCB_CMD_GDCBX]         = { RTM_GETDCB, dcbnl_getdcbx },
1737         [DCB_CMD_SDCBX]         = { RTM_SETDCB, dcbnl_setdcbx },
1738         [DCB_CMD_GFEATCFG]      = { RTM_GETDCB, dcbnl_getfeatcfg },
1739         [DCB_CMD_SFEATCFG]      = { RTM_SETDCB, dcbnl_setfeatcfg },
1740         [DCB_CMD_CEE_GET]       = { RTM_GETDCB, dcbnl_cee_get },
1741 };
1742
1743 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
1744                     struct netlink_ext_ack *extack)
1745 {
1746         struct net *net = sock_net(skb->sk);
1747         struct net_device *netdev;
1748         struct dcbmsg *dcb = nlmsg_data(nlh);
1749         struct nlattr *tb[DCB_ATTR_MAX + 1];
1750         u32 portid = skb ? NETLINK_CB(skb).portid : 0;
1751         int ret = -EINVAL;
1752         struct sk_buff *reply_skb;
1753         struct nlmsghdr *reply_nlh = NULL;
1754         const struct reply_func *fn;
1755
1756         if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
1757                 return -EPERM;
1758
1759         ret = nlmsg_parse_deprecated(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
1760                                      dcbnl_rtnl_policy, extack);
1761         if (ret < 0)
1762                 return ret;
1763
1764         if (dcb->cmd > DCB_CMD_MAX)
1765                 return -EINVAL;
1766
1767         /* check if a reply function has been defined for the command */
1768         fn = &reply_funcs[dcb->cmd];
1769         if (!fn->cb)
1770                 return -EOPNOTSUPP;
1771
1772         if (!tb[DCB_ATTR_IFNAME])
1773                 return -EINVAL;
1774
1775         netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
1776         if (!netdev)
1777                 return -ENODEV;
1778
1779         if (!netdev->dcbnl_ops)
1780                 return -EOPNOTSUPP;
1781
1782         reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
1783                                  nlh->nlmsg_flags, &reply_nlh);
1784         if (!reply_skb)
1785                 return -ENOBUFS;
1786
1787         ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
1788         if (ret < 0) {
1789                 nlmsg_free(reply_skb);
1790                 goto out;
1791         }
1792
1793         nlmsg_end(reply_skb, reply_nlh);
1794
1795         ret = rtnl_unicast(reply_skb, net, portid);
1796 out:
1797         return ret;
1798 }
1799
1800 static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
1801                                            int ifindex, int prio)
1802 {
1803         struct dcb_app_type *itr;
1804
1805         list_for_each_entry(itr, &dcb_app_list, list) {
1806                 if (itr->app.selector == app->selector &&
1807                     itr->app.protocol == app->protocol &&
1808                     itr->ifindex == ifindex &&
1809                     ((prio == -1) || itr->app.priority == prio))
1810                         return itr;
1811         }
1812
1813         return NULL;
1814 }
1815
1816 static int dcb_app_add(const struct dcb_app *app, int ifindex)
1817 {
1818         struct dcb_app_type *entry;
1819
1820         entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1821         if (!entry)
1822                 return -ENOMEM;
1823
1824         memcpy(&entry->app, app, sizeof(*app));
1825         entry->ifindex = ifindex;
1826         list_add(&entry->list, &dcb_app_list);
1827
1828         return 0;
1829 }
1830
1831 /**
1832  * dcb_getapp - retrieve the DCBX application user priority
1833  *
1834  * On success returns a non-zero 802.1p user priority bitmap
1835  * otherwise returns 0 as the invalid user priority bitmap to
1836  * indicate an error.
1837  */
1838 u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
1839 {
1840         struct dcb_app_type *itr;
1841         u8 prio = 0;
1842
1843         spin_lock_bh(&dcb_lock);
1844         itr = dcb_app_lookup(app, dev->ifindex, -1);
1845         if (itr)
1846                 prio = itr->app.priority;
1847         spin_unlock_bh(&dcb_lock);
1848
1849         return prio;
1850 }
1851 EXPORT_SYMBOL(dcb_getapp);
1852
1853 /**
1854  * dcb_setapp - add CEE dcb application data to app list
1855  *
1856  * Priority 0 is an invalid priority in CEE spec. This routine
1857  * removes applications from the app list if the priority is
1858  * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap
1859  */
1860 int dcb_setapp(struct net_device *dev, struct dcb_app *new)
1861 {
1862         struct dcb_app_type *itr;
1863         struct dcb_app_type event;
1864         int err = 0;
1865
1866         event.ifindex = dev->ifindex;
1867         memcpy(&event.app, new, sizeof(event.app));
1868         if (dev->dcbnl_ops->getdcbx)
1869                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1870
1871         spin_lock_bh(&dcb_lock);
1872         /* Search for existing match and replace */
1873         itr = dcb_app_lookup(new, dev->ifindex, -1);
1874         if (itr) {
1875                 if (new->priority)
1876                         itr->app.priority = new->priority;
1877                 else {
1878                         list_del(&itr->list);
1879                         kfree(itr);
1880                 }
1881                 goto out;
1882         }
1883         /* App type does not exist add new application type */
1884         if (new->priority)
1885                 err = dcb_app_add(new, dev->ifindex);
1886 out:
1887         spin_unlock_bh(&dcb_lock);
1888         if (!err)
1889                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1890         return err;
1891 }
1892 EXPORT_SYMBOL(dcb_setapp);
1893
1894 /**
1895  * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
1896  *
1897  * Helper routine which on success returns a non-zero 802.1Qaz user
1898  * priority bitmap otherwise returns 0 to indicate the dcb_app was
1899  * not found in APP list.
1900  */
1901 u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
1902 {
1903         struct dcb_app_type *itr;
1904         u8 prio = 0;
1905
1906         spin_lock_bh(&dcb_lock);
1907         itr = dcb_app_lookup(app, dev->ifindex, -1);
1908         if (itr)
1909                 prio |= 1 << itr->app.priority;
1910         spin_unlock_bh(&dcb_lock);
1911
1912         return prio;
1913 }
1914 EXPORT_SYMBOL(dcb_ieee_getapp_mask);
1915
1916 /**
1917  * dcb_ieee_setapp - add IEEE dcb application data to app list
1918  *
1919  * This adds Application data to the list. Multiple application
1920  * entries may exists for the same selector and protocol as long
1921  * as the priorities are different. Priority is expected to be a
1922  * 3-bit unsigned integer
1923  */
1924 int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
1925 {
1926         struct dcb_app_type event;
1927         int err = 0;
1928
1929         event.ifindex = dev->ifindex;
1930         memcpy(&event.app, new, sizeof(event.app));
1931         if (dev->dcbnl_ops->getdcbx)
1932                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1933
1934         spin_lock_bh(&dcb_lock);
1935         /* Search for existing match and abort if found */
1936         if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
1937                 err = -EEXIST;
1938                 goto out;
1939         }
1940
1941         err = dcb_app_add(new, dev->ifindex);
1942 out:
1943         spin_unlock_bh(&dcb_lock);
1944         if (!err)
1945                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1946         return err;
1947 }
1948 EXPORT_SYMBOL(dcb_ieee_setapp);
1949
1950 /**
1951  * dcb_ieee_delapp - delete IEEE dcb application data from list
1952  *
1953  * This removes a matching APP data from the APP list
1954  */
1955 int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
1956 {
1957         struct dcb_app_type *itr;
1958         struct dcb_app_type event;
1959         int err = -ENOENT;
1960
1961         event.ifindex = dev->ifindex;
1962         memcpy(&event.app, del, sizeof(event.app));
1963         if (dev->dcbnl_ops->getdcbx)
1964                 event.dcbx = dev->dcbnl_ops->getdcbx(dev);
1965
1966         spin_lock_bh(&dcb_lock);
1967         /* Search for existing match and remove it. */
1968         if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
1969                 list_del(&itr->list);
1970                 kfree(itr);
1971                 err = 0;
1972         }
1973
1974         spin_unlock_bh(&dcb_lock);
1975         if (!err)
1976                 call_dcbevent_notifiers(DCB_APP_EVENT, &event);
1977         return err;
1978 }
1979 EXPORT_SYMBOL(dcb_ieee_delapp);
1980
1981 /**
1982  * dcb_ieee_getapp_prio_dscp_mask_map - For a given device, find mapping from
1983  * priorities to the DSCP values assigned to that priority. Initialize p_map
1984  * such that each map element holds a bit mask of DSCP values configured for
1985  * that priority by APP entries.
1986  */
1987 void dcb_ieee_getapp_prio_dscp_mask_map(const struct net_device *dev,
1988                                         struct dcb_ieee_app_prio_map *p_map)
1989 {
1990         int ifindex = dev->ifindex;
1991         struct dcb_app_type *itr;
1992         u8 prio;
1993
1994         memset(p_map->map, 0, sizeof(p_map->map));
1995
1996         spin_lock_bh(&dcb_lock);
1997         list_for_each_entry(itr, &dcb_app_list, list) {
1998                 if (itr->ifindex == ifindex &&
1999                     itr->app.selector == IEEE_8021QAZ_APP_SEL_DSCP &&
2000                     itr->app.protocol < 64 &&
2001                     itr->app.priority < IEEE_8021QAZ_MAX_TCS) {
2002                         prio = itr->app.priority;
2003                         p_map->map[prio] |= 1ULL << itr->app.protocol;
2004                 }
2005         }
2006         spin_unlock_bh(&dcb_lock);
2007 }
2008 EXPORT_SYMBOL(dcb_ieee_getapp_prio_dscp_mask_map);
2009
2010 /**
2011  * dcb_ieee_getapp_dscp_prio_mask_map - For a given device, find mapping from
2012  * DSCP values to the priorities assigned to that DSCP value. Initialize p_map
2013  * such that each map element holds a bit mask of priorities configured for a
2014  * given DSCP value by APP entries.
2015  */
2016 void
2017 dcb_ieee_getapp_dscp_prio_mask_map(const struct net_device *dev,
2018                                    struct dcb_ieee_app_dscp_map *p_map)
2019 {
2020         int ifindex = dev->ifindex;
2021         struct dcb_app_type *itr;
2022
2023         memset(p_map->map, 0, sizeof(p_map->map));
2024
2025         spin_lock_bh(&dcb_lock);
2026         list_for_each_entry(itr, &dcb_app_list, list) {
2027                 if (itr->ifindex == ifindex &&
2028                     itr->app.selector == IEEE_8021QAZ_APP_SEL_DSCP &&
2029                     itr->app.protocol < 64 &&
2030                     itr->app.priority < IEEE_8021QAZ_MAX_TCS)
2031                         p_map->map[itr->app.protocol] |= 1 << itr->app.priority;
2032         }
2033         spin_unlock_bh(&dcb_lock);
2034 }
2035 EXPORT_SYMBOL(dcb_ieee_getapp_dscp_prio_mask_map);
2036
2037 /**
2038  * Per 802.1Q-2014, the selector value of 1 is used for matching on Ethernet
2039  * type, with valid PID values >= 1536. A special meaning is then assigned to
2040  * protocol value of 0: "default priority. For use when priority is not
2041  * otherwise specified".
2042  *
2043  * dcb_ieee_getapp_default_prio_mask - For a given device, find all APP entries
2044  * of the form {$PRIO, ETHERTYPE, 0} and construct a bit mask of all default
2045  * priorities set by these entries.
2046  */
2047 u8 dcb_ieee_getapp_default_prio_mask(const struct net_device *dev)
2048 {
2049         int ifindex = dev->ifindex;
2050         struct dcb_app_type *itr;
2051         u8 mask = 0;
2052
2053         spin_lock_bh(&dcb_lock);
2054         list_for_each_entry(itr, &dcb_app_list, list) {
2055                 if (itr->ifindex == ifindex &&
2056                     itr->app.selector == IEEE_8021QAZ_APP_SEL_ETHERTYPE &&
2057                     itr->app.protocol == 0 &&
2058                     itr->app.priority < IEEE_8021QAZ_MAX_TCS)
2059                         mask |= 1 << itr->app.priority;
2060         }
2061         spin_unlock_bh(&dcb_lock);
2062
2063         return mask;
2064 }
2065 EXPORT_SYMBOL(dcb_ieee_getapp_default_prio_mask);
2066
2067 static int __init dcbnl_init(void)
2068 {
2069         INIT_LIST_HEAD(&dcb_app_list);
2070
2071         rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, 0);
2072         rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, 0);
2073
2074         return 0;
2075 }
2076 device_initcall(dcbnl_init);