/* * 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 */ #include #include #include #include #include #include #include #include #include /** * 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, "); 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 (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) { 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; } int dcbnl_notify(struct net_device *dev, int event, int cmd, u32 seq, u32 pid) { 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; err = dcbnl_ieee_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; } EXPORT_SYMBOL(dcbnl_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_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_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; } 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; } /* Handle CEE DCBX GET commands. */ static int dcbnl_cee_get(struct net_device *netdev, struct nlattr **tb, u32 pid, u32 seq, u16 flags) { struct sk_buff *skb; struct nlmsghdr *nlh; struct dcbmsg *dcb; 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; if (!ops) return -EOPNOTSUPP; skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return -ENOBUFS; nlh = NLMSG_NEW(skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags); dcb = NLMSG_DATA(nlh); dcb->dcb_family = AF_UNSPEC; dcb->cmd = DCB_CMD_CEE_GET; 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 nla_put_failure; list_for_each_entry(itr, &dcb_app_list, list) { if (strncmp(itr->name, netdev->name, IFNAMSIZ) == 0) { 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; } nlmsg_end(skb, nlh); return rtnl_unicast(skb, &init_net, pid); dcb_unlock: spin_unlock(&dcb_lock); nla_put_failure: nlmsg_cancel(skb, nlh); nlmsg_failure: nlmsg_free(skb); 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 && (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) { 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; memcpy(&event.name, dev->name, sizeof(event.name)); memcpy(&event.app, new, sizeof(event.app)); 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 && (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) { 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)); strncpy(entry->name, dev->name, IFNAMSIZ); 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 && (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) { 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; memcpy(&event.name, dev->name, sizeof(event.name)); memcpy(&event.app, new, sizeof(event.app)); 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 && (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) { 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)); strncpy(entry->name, dev->name, IFNAMSIZ); 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; memcpy(&event.name, dev->name, sizeof(event.name)); memcpy(&event.app, del, sizeof(event.app)); 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 && (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) { 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);