/*

   * Copyright (c) 2008-2011, Intel Corporation.

   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
   * Place - Suite 330, Boston, MA 02111-1307 USA.
   *
   * Author: Lucy Liu <lucy.liu@intel.com>
   */
  
  #include <linux/netdevice.h>
  #include <linux/netlink.h>

  #include <linux/slab.h>

  #include <net/netlink.h>
  #include <net/rtnetlink.h>
  #include <linux/dcbnl.h>

  #include <net/dcbevent.h>

  #include <linux/rtnetlink.h>

  #include <linux/module.h>

  #include <net/sock.h>
  
  /**
   * Data Center Bridging (DCB) is a collection of Ethernet enhancements
   * intended to allow network traffic with differing requirements
   * (highly reliable, no drops vs. best effort vs. low latency) to operate
   * and co-exist on Ethernet.  Current DCB features are:
   *
   * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
   *   framework for assigning bandwidth guarantees to traffic classes.
   *
   * Priority-based Flow Control (PFC) - provides a flow control mechanism which
   *   can work independently for each 802.1p priority.
   *
   * Congestion Notification - provides a mechanism for end-to-end congestion
   *   control for protocols which do not have built-in congestion management.
   *
   * More information about the emerging standards for these Ethernet features
   * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
   *
   * This file implements an rtnetlink interface to allow configuration of DCB
   * features for capable devices.
   */
  
  MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");

  MODULE_DESCRIPTION("Data Center Bridging netlink interface");

  MODULE_LICENSE("GPL");
  
  /**************** DCB attribute policies *************************************/
  
  /* DCB netlink attributes policy */

  static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {

  	[DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
  	[DCB_ATTR_STATE]       = {.type = NLA_U8},
  	[DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
  	[DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
  	[DCB_ATTR_SET_ALL]     = {.type = NLA_U8},

  	[DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},

  	[DCB_ATTR_CAP]         = {.type = NLA_NESTED},
  	[DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
  	[DCB_ATTR_BCN]         = {.type = NLA_NESTED},

  	[DCB_ATTR_APP]         = {.type = NLA_NESTED},

  	[DCB_ATTR_IEEE]	       = {.type = NLA_NESTED},

  	[DCB_ATTR_DCBX]        = {.type = NLA_U8},

  	[DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},

  };
  
  /* DCB priority flow control to User Priority nested attributes */

  static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {

  	[DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
  	[DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
  };
  
  /* DCB priority grouping nested attributes */

  static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {

  	[DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
  	[DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
  	[DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
  };
  
  /* DCB traffic class nested attributes. */

  static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {

  	[DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
  	[DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
  	[DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
  	[DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
  	[DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
  };

  /* DCB capabilities nested attributes. */

  static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {

  	[DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
  	[DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
  	[DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
  	[DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
  	[DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
  	[DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
  	[DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
  	[DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},

  	[DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},

  };

  /* DCB capabilities nested attributes. */

  static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {

  	[DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
  	[DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
  	[DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
  };

  /* DCB BCN nested attributes. */

  static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {

  	[DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
  	[DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},

  	[DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
  	[DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},

  	[DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
  	[DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
  	[DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
  	[DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
  	[DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
  	[DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
  	[DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
  	[DCB_BCN_ATTR_W]            = {.type = NLA_U32},
  	[DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
  	[DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
  	[DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
  	[DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
  	[DCB_BCN_ATTR_C]            = {.type = NLA_U32},
  	[DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
  };

  /* DCB APP nested attributes. */

  static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {

  	[DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
  	[DCB_APP_ATTR_ID]           = {.type = NLA_U16},
  	[DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
  };

  /* IEEE 802.1Qaz nested attributes. */
  static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
  	[DCB_ATTR_IEEE_ETS]	    = {.len = sizeof(struct ieee_ets)},
  	[DCB_ATTR_IEEE_PFC]	    = {.len = sizeof(struct ieee_pfc)},
  	[DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
  };
  
  static const struct nla_policy dcbnl_ieee_app[DCB_ATTR_IEEE_APP_MAX + 1] = {
  	[DCB_ATTR_IEEE_APP]	    = {.len = sizeof(struct dcb_app)},
  };

  /* DCB number of traffic classes nested attributes. */
  static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
  	[DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
  	[DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
  	[DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
  	[DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
  };

  static LIST_HEAD(dcb_app_list);
  static DEFINE_SPINLOCK(dcb_lock);

  /* standard netlink reply call */
  static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
                         u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct dcbmsg *dcb;
  	struct nlmsghdr *nlh;
  	int ret = -EINVAL;
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		return ret;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = cmd;
  	dcb->dcb_pad = 0;
  
  	ret = nla_put_u8(dcbnl_skb, attr, value);
  	if (ret)
  		goto err;
  
  	/* end the message, assign the nlmsg_len. */
  	nlmsg_end(dcbnl_skb, nlh);
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)

  		return -EINVAL;

  
  	return 0;
  nlmsg_failure:
  err:

  	kfree_skb(dcbnl_skb);

  	return ret;
  }
  
  static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
                            u32 pid, u32 seq, u16 flags)
  {
  	int ret = -EINVAL;
  
  	/* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
  	if (!netdev->dcbnl_ops->getstate)
  		return ret;
  
  	ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
  	                  DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
  
  	return ret;
  }
  
  static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
                             u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
  	u8 value;
  	int ret = -EINVAL;
  	int i;
  	int getall = 0;
  
  	if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
  		return ret;
  
  	ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
  	                       tb[DCB_ATTR_PFC_CFG],
  	                       dcbnl_pfc_up_nest);
  	if (ret)
  		goto err_out;
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		goto err_out;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_PFC_GCFG;
  
  	nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
  	if (!nest)
  		goto err;
  
  	if (data[DCB_PFC_UP_ATTR_ALL])
  		getall = 1;
  
  	for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
  		if (!getall && !data[i])
  			continue;
  
  		netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
  		                             &value);
  		ret = nla_put_u8(dcbnl_skb, i, value);
  
  		if (ret) {
  			nla_nest_cancel(dcbnl_skb, nest);
  			goto err;
  		}
  	}
  	nla_nest_end(dcbnl_skb, nest);
  
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)

  		goto err_out;

  
  	return 0;
  nlmsg_failure:
  err:

  	kfree_skb(dcbnl_skb);

  err_out:
  	return -EINVAL;
  }
  
  static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
                                  u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	u8 perm_addr[MAX_ADDR_LEN];
  	int ret = -EINVAL;
  
  	if (!netdev->dcbnl_ops->getpermhwaddr)
  		return ret;
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		goto err_out;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_GPERM_HWADDR;
  
  	netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
  
  	ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
  	              perm_addr);
  
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)

  		goto err_out;

  
  	return 0;
  
  nlmsg_failure:

  	kfree_skb(dcbnl_skb);

  err_out:
  	return -EINVAL;
  }

  static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
                          u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
  	u8 value;
  	int ret = -EINVAL;
  	int i;
  	int getall = 0;
  
  	if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
  		return ret;
  
  	ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
  	                       dcbnl_cap_nest);
  	if (ret)
  		goto err_out;
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		goto err_out;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_GCAP;
  
  	nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
  	if (!nest)
  		goto err;
  
  	if (data[DCB_CAP_ATTR_ALL])
  		getall = 1;
  
  	for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
  		if (!getall && !data[i])
  			continue;
  
  		if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
  			ret = nla_put_u8(dcbnl_skb, i, value);
  
  			if (ret) {
  				nla_nest_cancel(dcbnl_skb, nest);
  				goto err;
  			}
  		}
  	}
  	nla_nest_end(dcbnl_skb, nest);
  
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)

  		goto err_out;

  
  	return 0;
  nlmsg_failure:
  err:

  	kfree_skb(dcbnl_skb);

  err_out:
  	return -EINVAL;
  }

  static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
                             u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
  	u8 value;
  	int ret = -EINVAL;
  	int i;
  	int getall = 0;
  
  	if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
  		return ret;
  
  	ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
  	                       dcbnl_numtcs_nest);
  	if (ret) {
  		ret = -EINVAL;
  		goto err_out;
  	}
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb) {
  		ret = -EINVAL;
  		goto err_out;
  	}
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_GNUMTCS;
  
  	nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
  	if (!nest) {
  		ret = -EINVAL;
  		goto err;
  	}
  
  	if (data[DCB_NUMTCS_ATTR_ALL])
  		getall = 1;
  
  	for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
  		if (!getall && !data[i])
  			continue;
  
  		ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
  		if (!ret) {
  			ret = nla_put_u8(dcbnl_skb, i, value);
  
  			if (ret) {
  				nla_nest_cancel(dcbnl_skb, nest);
  				ret = -EINVAL;
  				goto err;
  			}
  		} else {
  			goto err;
  		}
  	}
  	nla_nest_end(dcbnl_skb, nest);
  
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret) {
  		ret = -EINVAL;

  		goto err_out;

  	}
  
  	return 0;
  nlmsg_failure:
  err:

  	kfree_skb(dcbnl_skb);

  err_out:
  	return ret;
  }
  
  static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
                             u32 pid, u32 seq, u16 flags)
  {
  	struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
  	int ret = -EINVAL;
  	u8 value;
  	int i;

  	if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setnumtcs)

  		return ret;
  
  	ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
  	                       dcbnl_numtcs_nest);
  
  	if (ret) {
  		ret = -EINVAL;
  		goto err;
  	}
  
  	for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
  		if (data[i] == NULL)
  			continue;
  
  		value = nla_get_u8(data[i]);
  
  		ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
  
  		if (ret)
  			goto operr;
  	}
  
  operr:
  	ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
  	                  DCB_ATTR_NUMTCS, pid, seq, flags);
  
  err:
  	return ret;
  }

  static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags)
  {
  	int ret = -EINVAL;
  
  	if (!netdev->dcbnl_ops->getpfcstate)
  		return ret;
  
  	ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
  	                  DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
  	                  pid, seq, flags);
  
  	return ret;
  }
  
  static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags)
  {
  	int ret = -EINVAL;
  	u8 value;
  
  	if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
  		return ret;
  
  	value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
  
  	netdev->dcbnl_ops->setpfcstate(netdev, value);
  
  	ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
  	                  pid, seq, flags);
  
  	return ret;
  }

  static int dcbnl_getapp(struct net_device *netdev, struct nlattr **tb,
                          u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *app_nest;
  	struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
  	u16 id;
  	u8 up, idtype;
  	int ret = -EINVAL;

  	if (!tb[DCB_ATTR_APP])

  		goto out;
  
  	ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
  	                       dcbnl_app_nest);
  	if (ret)
  		goto out;
  
  	ret = -EINVAL;
  	/* all must be non-null */
  	if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
  	    (!app_tb[DCB_APP_ATTR_ID]))
  		goto out;
  
  	/* either by eth type or by socket number */
  	idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
  	if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
  	    (idtype != DCB_APP_IDTYPE_PORTNUM))
  		goto out;
  
  	id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);

  
  	if (netdev->dcbnl_ops->getapp) {
  		up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
  	} else {
  		struct dcb_app app = {
  					.selector = idtype,
  					.protocol = id,
  				     };
  		up = dcb_getapp(netdev, &app);
  	}

  
  	/* send this back */
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		goto out;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_GAPP;
  
  	app_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_APP);

  	if (!app_nest)
  		goto out_cancel;

  	ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_IDTYPE, idtype);
  	if (ret)
  		goto out_cancel;
  
  	ret = nla_put_u16(dcbnl_skb, DCB_APP_ATTR_ID, id);
  	if (ret)
  		goto out_cancel;
  
  	ret = nla_put_u8(dcbnl_skb, DCB_APP_ATTR_PRIORITY, up);
  	if (ret)
  		goto out_cancel;
  
  	nla_nest_end(dcbnl_skb, app_nest);
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)
  		goto nlmsg_failure;
  
  	goto out;
  
  out_cancel:
  	nla_nest_cancel(dcbnl_skb, app_nest);
  nlmsg_failure:
  	kfree_skb(dcbnl_skb);
  out:
  	return ret;
  }
  
  static int dcbnl_setapp(struct net_device *netdev, struct nlattr **tb,
                          u32 pid, u32 seq, u16 flags)
  {

  	int err, ret = -EINVAL;

  	u16 id;
  	u8 up, idtype;
  	struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];

  	if (!tb[DCB_ATTR_APP])

  		goto out;
  
  	ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
  	                       dcbnl_app_nest);
  	if (ret)
  		goto out;
  
  	ret = -EINVAL;
  	/* all must be non-null */
  	if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
  	    (!app_tb[DCB_APP_ATTR_ID]) ||
  	    (!app_tb[DCB_APP_ATTR_PRIORITY]))
  		goto out;
  
  	/* either by eth type or by socket number */
  	idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
  	if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
  	    (idtype != DCB_APP_IDTYPE_PORTNUM))
  		goto out;
  
  	id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
  	up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);

  	if (netdev->dcbnl_ops->setapp) {
  		err = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
  	} else {
  		struct dcb_app app;
  		app.selector = idtype;
  		app.protocol = id;
  		app.priority = up;
  		err = dcb_setapp(netdev, &app);
  	}
  
  	ret = dcbnl_reply(err, RTM_SETDCB, DCB_CMD_SAPP, DCB_ATTR_APP,
  			  pid, seq, flags);

  out:
  	return ret;
  }

  static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags, int dir)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *pg_nest, *param_nest, *data;
  	struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
  	struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
  	u8 prio, pgid, tc_pct, up_map;
  	int ret  = -EINVAL;
  	int getall = 0;
  	int i;
  
  	if (!tb[DCB_ATTR_PG_CFG] ||
  	    !netdev->dcbnl_ops->getpgtccfgtx ||
  	    !netdev->dcbnl_ops->getpgtccfgrx ||
  	    !netdev->dcbnl_ops->getpgbwgcfgtx ||
  	    !netdev->dcbnl_ops->getpgbwgcfgrx)
  		return ret;
  
  	ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
  	                       tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
  
  	if (ret)
  		goto err_out;
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		goto err_out;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
  
  	pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
  	if (!pg_nest)
  		goto err;
  
  	if (pg_tb[DCB_PG_ATTR_TC_ALL])
  		getall = 1;
  
  	for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
  		if (!getall && !pg_tb[i])
  			continue;
  
  		if (pg_tb[DCB_PG_ATTR_TC_ALL])
  			data = pg_tb[DCB_PG_ATTR_TC_ALL];
  		else
  			data = pg_tb[i];
  		ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
  				       data, dcbnl_tc_param_nest);
  		if (ret)
  			goto err_pg;
  
  		param_nest = nla_nest_start(dcbnl_skb, i);
  		if (!param_nest)
  			goto err_pg;
  
  		pgid = DCB_ATTR_VALUE_UNDEFINED;
  		prio = DCB_ATTR_VALUE_UNDEFINED;
  		tc_pct = DCB_ATTR_VALUE_UNDEFINED;
  		up_map = DCB_ATTR_VALUE_UNDEFINED;
  
  		if (dir) {
  			/* Rx */
  			netdev->dcbnl_ops->getpgtccfgrx(netdev,
  						i - DCB_PG_ATTR_TC_0, &prio,
  						&pgid, &tc_pct, &up_map);
  		} else {
  			/* Tx */
  			netdev->dcbnl_ops->getpgtccfgtx(netdev,
  						i - DCB_PG_ATTR_TC_0, &prio,
  						&pgid, &tc_pct, &up_map);
  		}
  
  		if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
  		    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
  			ret = nla_put_u8(dcbnl_skb,
  			                 DCB_TC_ATTR_PARAM_PGID, pgid);
  			if (ret)
  				goto err_param;
  		}
  		if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
  		    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
  			ret = nla_put_u8(dcbnl_skb,
  			                 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
  			if (ret)
  				goto err_param;
  		}
  		if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
  		    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
  			ret = nla_put_u8(dcbnl_skb,
  			                 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
  			if (ret)
  				goto err_param;
  		}
  		if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
  		    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
  			ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
  			                 tc_pct);
  			if (ret)
  				goto err_param;
  		}
  		nla_nest_end(dcbnl_skb, param_nest);
  	}
  
  	if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
  		getall = 1;
  	else
  		getall = 0;
  
  	for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
  		if (!getall && !pg_tb[i])
  			continue;
  
  		tc_pct = DCB_ATTR_VALUE_UNDEFINED;
  
  		if (dir) {
  			/* Rx */
  			netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
  					i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
  		} else {
  			/* Tx */
  			netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
  					i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
  		}
  		ret = nla_put_u8(dcbnl_skb, i, tc_pct);
  
  		if (ret)
  			goto err_pg;
  	}
  
  	nla_nest_end(dcbnl_skb, pg_nest);
  
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)

  		goto err_out;

  
  	return 0;
  
  err_param:
  	nla_nest_cancel(dcbnl_skb, param_nest);
  err_pg:
  	nla_nest_cancel(dcbnl_skb, pg_nest);
  nlmsg_failure:
  err:

  	kfree_skb(dcbnl_skb);

  err_out:
  	ret  = -EINVAL;
  	return ret;
  }
  
  static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags)
  {
  	return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
  }
  
  static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags)
  {
  	return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
  }
  
  static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
                            u32 pid, u32 seq, u16 flags)
  {
  	int ret = -EINVAL;
  	u8 value;
  
  	if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
  		return ret;
  
  	value = nla_get_u8(tb[DCB_ATTR_STATE]);

  	ret = dcbnl_reply(netdev->dcbnl_ops->setstate(netdev, value),
  	                  RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,

  	                  pid, seq, flags);
  
  	return ret;
  }
  
  static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
                             u32 pid, u32 seq, u16 flags)
  {
  	struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
  	int i;
  	int ret = -EINVAL;
  	u8 value;
  
  	if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
  		return ret;
  
  	ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
  	                       tb[DCB_ATTR_PFC_CFG],
  	                       dcbnl_pfc_up_nest);
  	if (ret)
  		goto err;
  
  	for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
  		if (data[i] == NULL)
  			continue;
  		value = nla_get_u8(data[i]);
  		netdev->dcbnl_ops->setpfccfg(netdev,
  			data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
  	}
  
  	ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
  	                  pid, seq, flags);
  err:
  	return ret;
  }
  
  static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
                          u32 pid, u32 seq, u16 flags)
  {
  	int ret = -EINVAL;
  
  	if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
  		return ret;
  
  	ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
  	                  DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
  
  	return ret;
  }
  
  static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags, int dir)
  {
  	struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
  	struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
  	int ret = -EINVAL;
  	int i;
  	u8 pgid;
  	u8 up_map;
  	u8 prio;
  	u8 tc_pct;
  
  	if (!tb[DCB_ATTR_PG_CFG] ||
  	    !netdev->dcbnl_ops->setpgtccfgtx ||
  	    !netdev->dcbnl_ops->setpgtccfgrx ||
  	    !netdev->dcbnl_ops->setpgbwgcfgtx ||
  	    !netdev->dcbnl_ops->setpgbwgcfgrx)
  		return ret;
  
  	ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
  	                       tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
  	if (ret)
  		goto err;
  
  	for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
  		if (!pg_tb[i])
  			continue;
  
  		ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
  		                       pg_tb[i], dcbnl_tc_param_nest);
  		if (ret)
  			goto err;
  
  		pgid = DCB_ATTR_VALUE_UNDEFINED;
  		prio = DCB_ATTR_VALUE_UNDEFINED;
  		tc_pct = DCB_ATTR_VALUE_UNDEFINED;
  		up_map = DCB_ATTR_VALUE_UNDEFINED;
  
  		if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
  			prio =
  			    nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
  
  		if (param_tb[DCB_TC_ATTR_PARAM_PGID])
  			pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
  
  		if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
  			tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
  
  		if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
  			up_map =
  			     nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
  
  		/* dir: Tx = 0, Rx = 1 */
  		if (dir) {
  			/* Rx */
  			netdev->dcbnl_ops->setpgtccfgrx(netdev,
  				i - DCB_PG_ATTR_TC_0,
  				prio, pgid, tc_pct, up_map);
  		} else {
  			/* Tx */
  			netdev->dcbnl_ops->setpgtccfgtx(netdev,
  				i - DCB_PG_ATTR_TC_0,
  				prio, pgid, tc_pct, up_map);
  		}
  	}
  
  	for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
  		if (!pg_tb[i])
  			continue;
  
  		tc_pct = nla_get_u8(pg_tb[i]);
  
  		/* dir: Tx = 0, Rx = 1 */
  		if (dir) {
  			/* Rx */
  			netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
  					 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
  		} else {
  			/* Tx */
  			netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
  					 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
  		}
  	}
  
  	ret = dcbnl_reply(0, RTM_SETDCB,
  			  (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
  			  DCB_ATTR_PG_CFG, pid, seq, flags);
  
  err:
  	return ret;
  }
  
  static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags)
  {
  	return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
  }
  
  static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
                               u32 pid, u32 seq, u16 flags)
  {
  	return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
  }

  static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlattr **tb,
                              u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *bcn_nest;
  	struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
  	u8 value_byte;
  	u32 value_integer;
  	int ret  = -EINVAL;
  	bool getall = false;
  	int i;
  
  	if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->getbcnrp ||
  	    !netdev->dcbnl_ops->getbcncfg)
  		return ret;
  
  	ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX,
  	                       tb[DCB_ATTR_BCN], dcbnl_bcn_nest);
  
  	if (ret)
  		goto err_out;
  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb)
  		goto err_out;
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_BCN_GCFG;
  
  	bcn_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_BCN);
  	if (!bcn_nest)
  		goto err;
  
  	if (bcn_tb[DCB_BCN_ATTR_ALL])
  		getall = true;
  
  	for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
  		if (!getall && !bcn_tb[i])
  			continue;
  
  		netdev->dcbnl_ops->getbcnrp(netdev, i - DCB_BCN_ATTR_RP_0,
  		                            &value_byte);
  		ret = nla_put_u8(dcbnl_skb, i, value_byte);
  		if (ret)
  			goto err_bcn;
  	}

  	for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {

  		if (!getall && !bcn_tb[i])
  			continue;
  
  		netdev->dcbnl_ops->getbcncfg(netdev, i,
  		                             &value_integer);
  		ret = nla_put_u32(dcbnl_skb, i, value_integer);
  		if (ret)
  			goto err_bcn;
  	}
  
  	nla_nest_end(dcbnl_skb, bcn_nest);
  
  	nlmsg_end(dcbnl_skb, nlh);
  
  	ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
  	if (ret)

  		goto err_out;

  
  	return 0;
  
  err_bcn:
  	nla_nest_cancel(dcbnl_skb, bcn_nest);
  nlmsg_failure:
  err:

  	kfree_skb(dcbnl_skb);

  err_out:
  	ret  = -EINVAL;
  	return ret;
  }
  
  static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlattr **tb,
                              u32 pid, u32 seq, u16 flags)
  {
  	struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
  	int i;
  	int ret = -EINVAL;
  	u8 value_byte;
  	u32 value_int;

  	if (!tb[DCB_ATTR_BCN] || !netdev->dcbnl_ops->setbcncfg ||
  	    !netdev->dcbnl_ops->setbcnrp)

  		return ret;
  
  	ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX,
  	                       tb[DCB_ATTR_BCN],
  	                       dcbnl_pfc_up_nest);
  	if (ret)
  		goto err;
  
  	for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) {
  		if (data[i] == NULL)
  			continue;
  		value_byte = nla_get_u8(data[i]);
  		netdev->dcbnl_ops->setbcnrp(netdev,
  			data[i]->nla_type - DCB_BCN_ATTR_RP_0, value_byte);
  	}

  	for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) {

  		if (data[i] == NULL)
  			continue;
  		value_int = nla_get_u32(data[i]);
  		netdev->dcbnl_ops->setbcncfg(netdev,
  	                                     i, value_int);
  	}
  
  	ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_BCN_SCFG, DCB_ATTR_BCN,
  	                  pid, seq, flags);
  err:
  	return ret;
  }

  static int dcbnl_build_peer_app(struct net_device *netdev, struct sk_buff* skb,
  				int app_nested_type, int app_info_type,
  				int app_entry_type)

  {
  	struct dcb_peer_app_info info;
  	struct dcb_app *table = NULL;
  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
  	u16 app_count;
  	int err;
  
  
  	/**
  	 * retrieve the peer app configuration form the driver. If the driver
  	 * handlers fail exit without doing anything
  	 */
  	err = ops->peer_getappinfo(netdev, &info, &app_count);
  	if (!err && app_count) {
  		table = kmalloc(sizeof(struct dcb_app) * app_count, GFP_KERNEL);
  		if (!table)
  			return -ENOMEM;
  
  		err = ops->peer_getapptable(netdev, table);
  	}
  
  	if (!err) {
  		u16 i;
  		struct nlattr *app;
  
  		/**
  		 * build the message, from here on the only possible failure
  		 * is due to the skb size
  		 */
  		err = -EMSGSIZE;

  		app = nla_nest_start(skb, app_nested_type);

  		if (!app)
  			goto nla_put_failure;

  		if (app_info_type)
  			NLA_PUT(skb, app_info_type, sizeof(info), &info);

  		for (i = 0; i < app_count; i++)

  			NLA_PUT(skb, app_entry_type, sizeof(struct dcb_app),

  				&table[i]);
  
  		nla_nest_end(skb, app);
  	}
  	err = 0;
  
  nla_put_failure:
  	kfree(table);
  	return err;
  }

  
  /* Handle IEEE 802.1Qaz GET commands. */

  static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)

  {

  	struct nlattr *ieee, *app;
  	struct dcb_app_type *itr;

  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;

  	int dcbx;

  	int err = -EMSGSIZE;

  
  	NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
  
  	ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
  	if (!ieee)
  		goto nla_put_failure;
  
  	if (ops->ieee_getets) {
  		struct ieee_ets ets;
  		err = ops->ieee_getets(netdev, &ets);
  		if (!err)
  			NLA_PUT(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets);
  	}
  
  	if (ops->ieee_getpfc) {
  		struct ieee_pfc pfc;
  		err = ops->ieee_getpfc(netdev, &pfc);
  		if (!err)
  			NLA_PUT(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc);
  	}

  	app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
  	if (!app)
  		goto nla_put_failure;
  
  	spin_lock(&dcb_lock);
  	list_for_each_entry(itr, &dcb_app_list, list) {

  		if (itr->ifindex == netdev->ifindex) {

  			err = nla_put(skb, DCB_ATTR_IEEE_APP, sizeof(itr->app),
  					 &itr->app);
  			if (err) {
  				spin_unlock(&dcb_lock);
  				goto nla_put_failure;
  			}
  		}

  	}

  
  	if (netdev->dcbnl_ops->getdcbx)
  		dcbx = netdev->dcbnl_ops->getdcbx(netdev);
  	else
  		dcbx = -EOPNOTSUPP;

  	spin_unlock(&dcb_lock);
  	nla_nest_end(skb, app);

  	/* get peer info if available */
  	if (ops->ieee_peer_getets) {
  		struct ieee_ets ets;
  		err = ops->ieee_peer_getets(netdev, &ets);
  		if (!err)
  			NLA_PUT(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets);
  	}
  
  	if (ops->ieee_peer_getpfc) {
  		struct ieee_pfc pfc;
  		err = ops->ieee_peer_getpfc(netdev, &pfc);
  		if (!err)
  			NLA_PUT(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc);
  	}
  
  	if (ops->peer_getappinfo && ops->peer_getapptable) {

  		err = dcbnl_build_peer_app(netdev, skb,
  					   DCB_ATTR_IEEE_PEER_APP,
  					   DCB_ATTR_IEEE_APP_UNSPEC,
  					   DCB_ATTR_IEEE_APP);

  		if (err)
  			goto nla_put_failure;
  	}

  	nla_nest_end(skb, ieee);

  	if (dcbx >= 0) {
  		err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
  		if (err)
  			goto nla_put_failure;
  	}

  	return 0;

  nla_put_failure:

  	return err;

  }

  static int dcbnl_cee_pg_fill(struct sk_buff *skb, struct net_device *dev,
  			     int dir)
  {
  	u8 pgid, up_map, prio, tc_pct;
  	const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
  	int i = dir ? DCB_ATTR_CEE_TX_PG : DCB_ATTR_CEE_RX_PG;
  	struct nlattr *pg = nla_nest_start(skb, i);
  
  	if (!pg)
  		goto nla_put_failure;
  
  	for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
  		struct nlattr *tc_nest = nla_nest_start(skb, i);
  
  		if (!tc_nest)
  			goto nla_put_failure;
  
  		pgid = DCB_ATTR_VALUE_UNDEFINED;
  		prio = DCB_ATTR_VALUE_UNDEFINED;
  		tc_pct = DCB_ATTR_VALUE_UNDEFINED;
  		up_map = DCB_ATTR_VALUE_UNDEFINED;
  
  		if (!dir)
  			ops->getpgtccfgrx(dev, i - DCB_PG_ATTR_TC_0,
  					  &prio, &pgid, &tc_pct, &up_map);
  		else
  			ops->getpgtccfgtx(dev, i - DCB_PG_ATTR_TC_0,
  					  &prio, &pgid, &tc_pct, &up_map);
  
  		NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_PGID, pgid);
  		NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
  		NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
  		NLA_PUT_U8(skb, DCB_TC_ATTR_PARAM_BW_PCT, tc_pct);
  		nla_nest_end(skb, tc_nest);
  	}
  
  	for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
  		tc_pct = DCB_ATTR_VALUE_UNDEFINED;
  
  		if (!dir)
  			ops->getpgbwgcfgrx(dev, i - DCB_PG_ATTR_BW_ID_0,
  					   &tc_pct);
  		else
  			ops->getpgbwgcfgtx(dev, i - DCB_PG_ATTR_BW_ID_0,
  					   &tc_pct);
  		NLA_PUT_U8(skb, i, tc_pct);
  	}
  	nla_nest_end(skb, pg);
  	return 0;
  
  nla_put_failure:
  	return -EMSGSIZE;
  }
  
  static int dcbnl_cee_fill(struct sk_buff *skb, struct net_device *netdev)
  {
  	struct nlattr *cee, *app;
  	struct dcb_app_type *itr;
  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
  	int dcbx, i, err = -EMSGSIZE;
  	u8 value;
  
  	NLA_PUT_STRING(skb, DCB_ATTR_IFNAME, netdev->name);
  
  	cee = nla_nest_start(skb, DCB_ATTR_CEE);
  	if (!cee)
  		goto nla_put_failure;
  
  	/* local pg */
  	if (ops->getpgtccfgtx && ops->getpgbwgcfgtx) {
  		err = dcbnl_cee_pg_fill(skb, netdev, 1);
  		if (err)
  			goto nla_put_failure;
  	}
  
  	if (ops->getpgtccfgrx && ops->getpgbwgcfgrx) {
  		err = dcbnl_cee_pg_fill(skb, netdev, 0);
  		if (err)
  			goto nla_put_failure;
  	}
  
  	/* local pfc */
  	if (ops->getpfccfg) {
  		struct nlattr *pfc_nest = nla_nest_start(skb, DCB_ATTR_CEE_PFC);
  
  		if (!pfc_nest)
  			goto nla_put_failure;
  
  		for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
  			ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0, &value);
  			NLA_PUT_U8(skb, i, value);
  		}
  		nla_nest_end(skb, pfc_nest);
  	}
  
  	/* local app */
  	spin_lock(&dcb_lock);
  	app = nla_nest_start(skb, DCB_ATTR_CEE_APP_TABLE);
  	if (!app)

  		goto dcb_unlock;

  
  	list_for_each_entry(itr, &dcb_app_list, list) {

  		if (itr->ifindex == netdev->ifindex) {

  			struct nlattr *app_nest = nla_nest_start(skb,
  								 DCB_ATTR_APP);
  			if (!app_nest)
  				goto dcb_unlock;
  
  			err = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE,
  					 itr->app.selector);
  			if (err)
  				goto dcb_unlock;
  
  			err = nla_put_u16(skb, DCB_APP_ATTR_ID,
  					  itr->app.protocol);
  			if (err)
  				goto dcb_unlock;
  
  			err = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY,
  					 itr->app.priority);
  			if (err)
  				goto dcb_unlock;
  
  			nla_nest_end(skb, app_nest);
  		}
  	}
  	nla_nest_end(skb, app);
  
  	if (netdev->dcbnl_ops->getdcbx)
  		dcbx = netdev->dcbnl_ops->getdcbx(netdev);
  	else
  		dcbx = -EOPNOTSUPP;
  
  	spin_unlock(&dcb_lock);
  
  	/* features flags */
  	if (ops->getfeatcfg) {
  		struct nlattr *feat = nla_nest_start(skb, DCB_ATTR_CEE_FEAT);
  		if (!feat)
  			goto nla_put_failure;
  
  		for (i = DCB_FEATCFG_ATTR_ALL + 1; i <= DCB_FEATCFG_ATTR_MAX;
  		     i++)
  			if (!ops->getfeatcfg(netdev, i, &value))
  				NLA_PUT_U8(skb, i, value);
  
  		nla_nest_end(skb, feat);
  	}
  
  	/* peer info if available */
  	if (ops->cee_peer_getpg) {
  		struct cee_pg pg;
  		err = ops->cee_peer_getpg(netdev, &pg);
  		if (!err)
  			NLA_PUT(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg);
  	}
  
  	if (ops->cee_peer_getpfc) {
  		struct cee_pfc pfc;
  		err = ops->cee_peer_getpfc(netdev, &pfc);
  		if (!err)
  			NLA_PUT(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc);
  	}
  
  	if (ops->peer_getappinfo && ops->peer_getapptable) {
  		err = dcbnl_build_peer_app(netdev, skb,
  					   DCB_ATTR_CEE_PEER_APP_TABLE,
  					   DCB_ATTR_CEE_PEER_APP_INFO,
  					   DCB_ATTR_CEE_PEER_APP);
  		if (err)
  			goto nla_put_failure;
  	}
  	nla_nest_end(skb, cee);
  
  	/* DCBX state */
  	if (dcbx >= 0) {
  		err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
  		if (err)
  			goto nla_put_failure;
  	}
  	return 0;
  
  dcb_unlock:
  	spin_unlock(&dcb_lock);
  nla_put_failure:
  	return err;
  }
  
  static int dcbnl_notify(struct net_device *dev, int event, int cmd,
  			u32 seq, u32 pid, int dcbx_ver)

  {
  	struct net *net = dev_net(dev);
  	struct sk_buff *skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
  	int err;
  
  	if (!ops)
  		return -EOPNOTSUPP;
  
  	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!skb)
  		return -ENOBUFS;
  
  	nlh = nlmsg_put(skb, pid, 0, event, sizeof(*dcb), 0);
  	if (nlh == NULL) {

  		nlmsg_free(skb);

  		return -EMSGSIZE;
  	}
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = cmd;

  	if (dcbx_ver == DCB_CAP_DCBX_VER_IEEE)
  		err = dcbnl_ieee_fill(skb, dev);
  	else
  		err = dcbnl_cee_fill(skb, dev);

  	if (err < 0) {
  		/* Report error to broadcast listeners */
  		nlmsg_cancel(skb, nlh);
  		kfree_skb(skb);
  		rtnl_set_sk_err(net, RTNLGRP_DCB, err);
  	} else {
  		/* End nlmsg and notify broadcast listeners */
  		nlmsg_end(skb, nlh);
  		rtnl_notify(skb, net, 0, RTNLGRP_DCB, NULL, GFP_KERNEL);
  	}
  
  	return err;
  }

  
  int dcbnl_ieee_notify(struct net_device *dev, int event, int cmd,
  		      u32 seq, u32 pid)
  {
  	return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_IEEE);
  }
  EXPORT_SYMBOL(dcbnl_ieee_notify);
  
  int dcbnl_cee_notify(struct net_device *dev, int event, int cmd,
  		     u32 seq, u32 pid)
  {
  	return dcbnl_notify(dev, event, cmd, seq, pid, DCB_CAP_DCBX_VER_CEE);
  }
  EXPORT_SYMBOL(dcbnl_cee_notify);

  
  /* Handle IEEE 802.1Qaz SET commands. If any requested operation can not
   * be completed the entire msg is aborted and error value is returned.
   * No attempt is made to reconcile the case where only part of the
   * cmd can be completed.
   */
  static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
  			  u32 pid, u32 seq, u16 flags)
  {
  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
  	struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
  	int err = -EOPNOTSUPP;
  
  	if (!ops)
  		return err;

  	if (!tb[DCB_ATTR_IEEE])
  		return -EINVAL;

  	err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
  			       tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
  	if (err)
  		return err;
  
  	if (ieee[DCB_ATTR_IEEE_ETS] && ops->ieee_setets) {
  		struct ieee_ets *ets = nla_data(ieee[DCB_ATTR_IEEE_ETS]);
  		err = ops->ieee_setets(netdev, ets);
  		if (err)
  			goto err;
  	}
  
  	if (ieee[DCB_ATTR_IEEE_PFC] && ops->ieee_setpfc) {
  		struct ieee_pfc *pfc = nla_data(ieee[DCB_ATTR_IEEE_PFC]);
  		err = ops->ieee_setpfc(netdev, pfc);
  		if (err)
  			goto err;
  	}
  
  	if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
  		struct nlattr *attr;
  		int rem;
  
  		nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
  			struct dcb_app *app_data;
  			if (nla_type(attr) != DCB_ATTR_IEEE_APP)
  				continue;
  			app_data = nla_data(attr);
  			if (ops->ieee_setapp)
  				err = ops->ieee_setapp(netdev, app_data);
  			else

  				err = dcb_ieee_setapp(netdev, app_data);

  			if (err)
  				goto err;
  		}
  	}
  
  err:
  	dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_SET, DCB_ATTR_IEEE,
  		    pid, seq, flags);

  	dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);

  	return err;
  }
  
  static int dcbnl_ieee_get(struct net_device *netdev, struct nlattr **tb,
  			  u32 pid, u32 seq, u16 flags)
  {
  	struct net *net = dev_net(netdev);
  	struct sk_buff *skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
  	int err;
  
  	if (!ops)
  		return -EOPNOTSUPP;
  
  	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!skb)
  		return -ENOBUFS;
  
  	nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  	if (nlh == NULL) {

  		nlmsg_free(skb);

  		return -EMSGSIZE;
  	}
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_IEEE_GET;
  
  	err = dcbnl_ieee_fill(skb, netdev);
  
  	if (err < 0) {
  		nlmsg_cancel(skb, nlh);
  		kfree_skb(skb);
  	} else {
  		nlmsg_end(skb, nlh);
  		err = rtnl_unicast(skb, net, pid);
  	}
  
  	return err;
  }

  
  static int dcbnl_ieee_del(struct net_device *netdev, struct nlattr **tb,
  			  u32 pid, u32 seq, u16 flags)
  {
  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
  	struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
  	int err = -EOPNOTSUPP;
  
  	if (!ops)
  		return -EOPNOTSUPP;
  
  	if (!tb[DCB_ATTR_IEEE])
  		return -EINVAL;
  
  	err = nla_parse_nested(ieee, DCB_ATTR_IEEE_MAX,
  			       tb[DCB_ATTR_IEEE], dcbnl_ieee_policy);
  	if (err)
  		return err;
  
  	if (ieee[DCB_ATTR_IEEE_APP_TABLE]) {
  		struct nlattr *attr;
  		int rem;
  
  		nla_for_each_nested(attr, ieee[DCB_ATTR_IEEE_APP_TABLE], rem) {
  			struct dcb_app *app_data;
  
  			if (nla_type(attr) != DCB_ATTR_IEEE_APP)
  				continue;
  			app_data = nla_data(attr);
  			if (ops->ieee_delapp)
  				err = ops->ieee_delapp(netdev, app_data);
  			else
  				err = dcb_ieee_delapp(netdev, app_data);
  			if (err)
  				goto err;
  		}
  	}
  
  err:
  	dcbnl_reply(err, RTM_SETDCB, DCB_CMD_IEEE_DEL, DCB_ATTR_IEEE,
  		    pid, seq, flags);

  	dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_DEL, seq, 0);

  	return err;
  }

  /* DCBX configuration */
  static int dcbnl_getdcbx(struct net_device *netdev, struct nlattr **tb,
  			 u32 pid, u32 seq, u16 flags)
  {

  	int ret;

  
  	if (!netdev->dcbnl_ops->getdcbx)

  		return -EOPNOTSUPP;

  
  	ret = dcbnl_reply(netdev->dcbnl_ops->getdcbx(netdev), RTM_GETDCB,
  			  DCB_CMD_GDCBX, DCB_ATTR_DCBX, pid, seq, flags);
  
  	return ret;
  }
  
  static int dcbnl_setdcbx(struct net_device *netdev, struct nlattr **tb,
  			 u32 pid, u32 seq, u16 flags)
  {

  	int ret;

  	u8 value;

  	if (!netdev->dcbnl_ops->setdcbx)
  		return -EOPNOTSUPP;
  
  	if (!tb[DCB_ATTR_DCBX])
  		return -EINVAL;

  
  	value = nla_get_u8(tb[DCB_ATTR_DCBX]);
  
  	ret = dcbnl_reply(netdev->dcbnl_ops->setdcbx(netdev, value),
  			  RTM_SETDCB, DCB_CMD_SDCBX, DCB_ATTR_DCBX,
  			  pid, seq, flags);
  
  	return ret;
  }

  static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlattr **tb,
  			    u32 pid, u32 seq, u16 flags)
  {
  	struct sk_buff *dcbnl_skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;
  	struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1], *nest;
  	u8 value;

  	int ret, i;

  	int getall = 0;

  	if (!netdev->dcbnl_ops->getfeatcfg)
  		return -EOPNOTSUPP;
  
  	if (!tb[DCB_ATTR_FEATCFG])
  		return -EINVAL;

  
  	ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
  			       dcbnl_featcfg_nest);

  	if (ret)

  		goto err_out;

  
  	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!dcbnl_skb) {

  		ret = -ENOBUFS;

  		goto err_out;
  	}
  
  	nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_GFEATCFG;
  
  	nest = nla_nest_start(dcbnl_skb, DCB_ATTR_FEATCFG);
  	if (!nest) {

  		ret = -EMSGSIZE;
  		goto nla_put_failure;

  	}
  
  	if (data[DCB_FEATCFG_ATTR_ALL])
  		getall = 1;
  
  	for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
  		if (!getall && !data[i])
  			continue;
  
  		ret = netdev->dcbnl_ops->getfeatcfg(netdev, i, &value);

  		if (!ret)

  			ret = nla_put_u8(dcbnl_skb, i, value);

  		if (ret) {
  			nla_nest_cancel(dcbnl_skb, nest);
  			goto nla_put_failure;
  		}

  	}
  	nla_nest_end(dcbnl_skb, nest);
  
  	nlmsg_end(dcbnl_skb, nlh);

  	return rtnl_unicast(dcbnl_skb, &init_net, pid);
  nla_put_failure:
  	nlmsg_cancel(dcbnl_skb, nlh);

  nlmsg_failure:

  	kfree_skb(dcbnl_skb);
  err_out:
  	return ret;
  }
  
  static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlattr **tb,
  			    u32 pid, u32 seq, u16 flags)
  {
  	struct nlattr *data[DCB_FEATCFG_ATTR_MAX + 1];

  	int ret, i;

  	u8 value;

  	if (!netdev->dcbnl_ops->setfeatcfg)
  		return -ENOTSUPP;
  
  	if (!tb[DCB_ATTR_FEATCFG])
  		return -EINVAL;

  
  	ret = nla_parse_nested(data, DCB_FEATCFG_ATTR_MAX, tb[DCB_ATTR_FEATCFG],
  			       dcbnl_featcfg_nest);

  	if (ret)

  		goto err;

  
  	for (i = DCB_FEATCFG_ATTR_ALL+1; i <= DCB_FEATCFG_ATTR_MAX; i++) {
  		if (data[i] == NULL)
  			continue;
  
  		value = nla_get_u8(data[i]);
  
  		ret = netdev->dcbnl_ops->setfeatcfg(netdev, i, value);
  
  		if (ret)

  			goto err;

  	}

  err:

  	dcbnl_reply(ret, RTM_SETDCB, DCB_CMD_SFEATCFG, DCB_ATTR_FEATCFG,
  		    pid, seq, flags);

  	return ret;
  }

  /* Handle CEE DCBX GET commands. */
  static int dcbnl_cee_get(struct net_device *netdev, struct nlattr **tb,
  			 u32 pid, u32 seq, u16 flags)
  {

  	struct net *net = dev_net(netdev);

  	struct sk_buff *skb;
  	struct nlmsghdr *nlh;
  	struct dcbmsg *dcb;

  	const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;

  	int err;

  
  	if (!ops)
  		return -EOPNOTSUPP;
  
  	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  	if (!skb)
  		return -ENOBUFS;

  	nlh = nlmsg_put(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
  	if (nlh == NULL) {
  		nlmsg_free(skb);
  		return -EMSGSIZE;
  	}

  
  	dcb = NLMSG_DATA(nlh);
  	dcb->dcb_family = AF_UNSPEC;
  	dcb->cmd = DCB_CMD_CEE_GET;

  	err = dcbnl_cee_fill(skb, netdev);

  	if (err < 0) {
  		nlmsg_cancel(skb, nlh);
  		nlmsg_free(skb);
  	} else {
  		nlmsg_end(skb, nlh);
  		err = rtnl_unicast(skb, net, pid);

  	}

  	return err;

  }

  static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
  {
  	struct net *net = sock_net(skb->sk);
  	struct net_device *netdev;
  	struct dcbmsg  *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
  	struct nlattr *tb[DCB_ATTR_MAX + 1];
  	u32 pid = skb ? NETLINK_CB(skb).pid : 0;
  	int ret = -EINVAL;

  	if (!net_eq(net, &init_net))

  		return -EINVAL;
  
  	ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
  			  dcbnl_rtnl_policy);
  	if (ret < 0)
  		return ret;
  
  	if (!tb[DCB_ATTR_IFNAME])
  		return -EINVAL;
  
  	netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
  	if (!netdev)
  		return -EINVAL;
  
  	if (!netdev->dcbnl_ops)
  		goto errout;
  
  	switch (dcb->cmd) {
  	case DCB_CMD_GSTATE:
  		ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
  		                     nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PFC_GCFG:
  		ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                      nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_GPERM_HWADDR:
  		ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
  		                           nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PGTX_GCFG:
  		ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                        nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PGRX_GCFG:
  		ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                        nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_BCN_GCFG:
  		ret = dcbnl_bcn_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                       nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_SSTATE:
  		ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
  		                     nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PFC_SCFG:
  		ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                      nlh->nlmsg_flags);
  		goto out;
  
  	case DCB_CMD_SET_ALL:
  		ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
  		                   nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PGTX_SCFG:
  		ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                        nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PGRX_SCFG:
  		ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                        nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_GCAP:
  		ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
  		                   nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_GNUMTCS:
  		ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
  		                      nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_SNUMTCS:
  		ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
  		                      nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_PFC_GSTATE:
  		ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
  		                        nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_PFC_SSTATE:
  		ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
  		                        nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_BCN_SCFG:
  		ret = dcbnl_bcn_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
  		                       nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_GAPP:
  		ret = dcbnl_getapp(netdev, tb, pid, nlh->nlmsg_seq,
  		                   nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_SAPP:
  		ret = dcbnl_setapp(netdev, tb, pid, nlh->nlmsg_seq,
  		                   nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_IEEE_SET:
  		ret = dcbnl_ieee_set(netdev, tb, pid, nlh->nlmsg_seq,

  				     nlh->nlmsg_flags);

  		goto out;
  	case DCB_CMD_IEEE_GET:
  		ret = dcbnl_ieee_get(netdev, tb, pid, nlh->nlmsg_seq,

  				     nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_IEEE_DEL:
  		ret = dcbnl_ieee_del(netdev, tb, pid, nlh->nlmsg_seq,
  				     nlh->nlmsg_flags);

  		goto out;

  	case DCB_CMD_GDCBX:
  		ret = dcbnl_getdcbx(netdev, tb, pid, nlh->nlmsg_seq,
  				    nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_SDCBX:
  		ret = dcbnl_setdcbx(netdev, tb, pid, nlh->nlmsg_seq,
  				    nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_GFEATCFG:
  		ret = dcbnl_getfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
  				       nlh->nlmsg_flags);
  		goto out;
  	case DCB_CMD_SFEATCFG:
  		ret = dcbnl_setfeatcfg(netdev, tb, pid, nlh->nlmsg_seq,
  				       nlh->nlmsg_flags);
  		goto out;

  	case DCB_CMD_CEE_GET:
  		ret = dcbnl_cee_get(netdev, tb, pid, nlh->nlmsg_seq,
  				    nlh->nlmsg_flags);
  		goto out;

  	default:
  		goto errout;
  	}
  errout:
  	ret = -EINVAL;
  out:
  	dev_put(netdev);
  	return ret;
  }

  /**
   * dcb_getapp - retrieve the DCBX application user priority
   *
   * On success returns a non-zero 802.1p user priority bitmap
   * otherwise returns 0 as the invalid user priority bitmap to
   * indicate an error.
   */
  u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
  {
  	struct dcb_app_type *itr;
  	u8 prio = 0;
  
  	spin_lock(&dcb_lock);
  	list_for_each_entry(itr, &dcb_app_list, list) {
  		if (itr->app.selector == app->selector &&
  		    itr->app.protocol == app->protocol &&

  		    itr->ifindex == dev->ifindex) {

  			prio = itr->app.priority;
  			break;
  		}
  	}
  	spin_unlock(&dcb_lock);
  
  	return prio;
  }
  EXPORT_SYMBOL(dcb_getapp);
  
  /**

   * dcb_setapp - add CEE dcb application data to app list

   *

   * Priority 0 is an invalid priority in CEE spec. This routine
   * removes applications from the app list if the priority is
   * set to zero.

   */

  int dcb_setapp(struct net_device *dev, struct dcb_app *new)

  {
  	struct dcb_app_type *itr;

  	struct dcb_app_type event;

  	event.ifindex = dev->ifindex;

  	memcpy(&event.app, new, sizeof(event.app));

  	if (dev->dcbnl_ops->getdcbx)
  		event.dcbx = dev->dcbnl_ops->getdcbx(dev);

  
  	spin_lock(&dcb_lock);
  	/* Search for existing match and replace */
  	list_for_each_entry(itr, &dcb_app_list, list) {
  		if (itr->app.selector == new->selector &&
  		    itr->app.protocol == new->protocol &&

  		    itr->ifindex == dev->ifindex) {

  			if (new->priority)
  				itr->app.priority = new->priority;
  			else {
  				list_del(&itr->list);
  				kfree(itr);
  			}
  			goto out;
  		}
  	}
  	/* App type does not exist add new application type */
  	if (new->priority) {
  		struct dcb_app_type *entry;
  		entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
  		if (!entry) {
  			spin_unlock(&dcb_lock);
  			return -ENOMEM;
  		}
  
  		memcpy(&entry->app, new, sizeof(*new));

  		entry->ifindex = dev->ifindex;

  		list_add(&entry->list, &dcb_app_list);
  	}
  out:
  	spin_unlock(&dcb_lock);

  	call_dcbevent_notifiers(DCB_APP_EVENT, &event);

  	return 0;
  }
  EXPORT_SYMBOL(dcb_setapp);

  /**

   * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
   *
   * Helper routine which on success returns a non-zero 802.1Qaz user
   * priority bitmap otherwise returns 0 to indicate the dcb_app was
   * not found in APP list.
   */
  u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
  {
  	struct dcb_app_type *itr;
  	u8 prio = 0;
  
  	spin_lock(&dcb_lock);
  	list_for_each_entry(itr, &dcb_app_list, list) {
  		if (itr->app.selector == app->selector &&
  		    itr->app.protocol == app->protocol &&

  		    itr->ifindex == dev->ifindex) {

  			prio |= 1 << itr->app.priority;
  		}
  	}
  	spin_unlock(&dcb_lock);
  
  	return prio;
  }
  EXPORT_SYMBOL(dcb_ieee_getapp_mask);
  
  /**

   * dcb_ieee_setapp - add IEEE dcb application data to app list
   *
   * This adds Application data to the list. Multiple application
   * entries may exists for the same selector and protocol as long
   * as the priorities are different.
   */
  int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
  {
  	struct dcb_app_type *itr, *entry;
  	struct dcb_app_type event;
  	int err = 0;

  	event.ifindex = dev->ifindex;

  	memcpy(&event.app, new, sizeof(event.app));

  	if (dev->dcbnl_ops->getdcbx)
  		event.dcbx = dev->dcbnl_ops->getdcbx(dev);

  
  	spin_lock(&dcb_lock);
  	/* Search for existing match and abort if found */
  	list_for_each_entry(itr, &dcb_app_list, list) {
  		if (itr->app.selector == new->selector &&
  		    itr->app.protocol == new->protocol &&
  		    itr->app.priority == new->priority &&

  		    itr->ifindex == dev->ifindex) {

  			err = -EEXIST;
  			goto out;
  		}
  	}
  
  	/* App entry does not exist add new entry */
  	entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
  	if (!entry) {
  		err = -ENOMEM;
  		goto out;
  	}
  
  	memcpy(&entry->app, new, sizeof(*new));

  	entry->ifindex = dev->ifindex;

  	list_add(&entry->list, &dcb_app_list);
  out:
  	spin_unlock(&dcb_lock);
  	if (!err)
  		call_dcbevent_notifiers(DCB_APP_EVENT, &event);
  	return err;
  }
  EXPORT_SYMBOL(dcb_ieee_setapp);

  /**
   * dcb_ieee_delapp - delete IEEE dcb application data from list
   *
   * This removes a matching APP data from the APP list
   */
  int dcb_ieee_delapp(struct net_device *dev, struct dcb_app *del)
  {
  	struct dcb_app_type *itr;
  	struct dcb_app_type event;
  	int err = -ENOENT;

  	event.ifindex = dev->ifindex;

  	memcpy(&event.app, del, sizeof(event.app));

  	if (dev->dcbnl_ops->getdcbx)
  		event.dcbx = dev->dcbnl_ops->getdcbx(dev);

  
  	spin_lock(&dcb_lock);
  	/* Search for existing match and remove it. */
  	list_for_each_entry(itr, &dcb_app_list, list) {
  		if (itr->app.selector == del->selector &&
  		    itr->app.protocol == del->protocol &&
  		    itr->app.priority == del->priority &&

  		    itr->ifindex == dev->ifindex) {

  			list_del(&itr->list);
  			kfree(itr);
  			err = 0;
  			goto out;
  		}
  	}
  
  out:
  	spin_unlock(&dcb_lock);
  	if (!err)
  		call_dcbevent_notifiers(DCB_APP_EVENT, &event);
  	return err;
  }
  EXPORT_SYMBOL(dcb_ieee_delapp);

  static void dcb_flushapp(void)

  {
  	struct dcb_app_type *app;

  	struct dcb_app_type *tmp;

  
  	spin_lock(&dcb_lock);

  	list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {

  		list_del(&app->list);
  		kfree(app);
  	}
  	spin_unlock(&dcb_lock);
  }

  static int __init dcbnl_init(void)
  {

  	INIT_LIST_HEAD(&dcb_app_list);

  	rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL, NULL);
  	rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL, NULL);

  
  	return 0;
  }
  module_init(dcbnl_init);
  
  static void __exit dcbnl_exit(void)
  {
  	rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
  	rtnl_unregister(PF_UNSPEC, RTM_SETDCB);

  	dcb_flushapp();

  }
  module_exit(dcbnl_exit);