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linux/net/dcb/dcbnl.c
stephen hemminger 332b4fc886 dcb: enforce minimum length on IEEE_APPS attribute 
Found by reviewing the warning about unused policy table.
The code implies that it meant to check for size, but since
it unrolled the loop for attribute validation that is never used.
Instead do explicit check for attribute.

Compile tested only. Needs review by original author.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-21 13:42:33 -04:00

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/*
* 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, see <http://www.gnu.org/licenses/>.
*
* Description: Data Center Bridging netlink interface
* 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/init.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.
*/
/**************** 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},
[DCB_ATTR_IEEE_MAXRATE] = {.len = sizeof(struct ieee_maxrate)},
[DCB_ATTR_IEEE_QCN] = {.len = sizeof(struct ieee_qcn)},
[DCB_ATTR_IEEE_QCN_STATS] = {.len = sizeof(struct ieee_qcn_stats)},
};
/* 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);
static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
u32 flags, struct nlmsghdr **nlhp)
{
struct sk_buff *skb;
struct dcbmsg *dcb;
struct nlmsghdr *nlh;
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!skb)
return NULL;
nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
BUG_ON(!nlh);
dcb = nlmsg_data(nlh);
dcb->dcb_family = AF_UNSPEC;
dcb->cmd = cmd;
dcb->dcb_pad = 0;
if (nlhp)
*nlhp = nlh;
return skb;
}
static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
/* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
if (!netdev->dcbnl_ops->getstate)
return -EOPNOTSUPP;
return nla_put_u8(skb, DCB_ATTR_STATE,
netdev->dcbnl_ops->getstate(netdev));
}
static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
u8 value;
int ret;
int i;
int getall = 0;
if (!tb[DCB_ATTR_PFC_CFG])
return -EINVAL;
if (!netdev->dcbnl_ops->getpfccfg)
return -EOPNOTSUPP;
ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
tb[DCB_ATTR_PFC_CFG], dcbnl_pfc_up_nest, NULL);
if (ret)
return ret;
nest = nla_nest_start(skb, DCB_ATTR_PFC_CFG);
if (!nest)
return -EMSGSIZE;
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(skb, i, value);
if (ret) {
nla_nest_cancel(skb, nest);
return ret;
}
}
nla_nest_end(skb, nest);
return 0;
}
static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
u8 perm_addr[MAX_ADDR_LEN];
if (!netdev->dcbnl_ops->getpermhwaddr)
return -EOPNOTSUPP;
memset(perm_addr, 0, sizeof(perm_addr));
netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
}
static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
u8 value;
int ret;
int i;
int getall = 0;
if (!tb[DCB_ATTR_CAP])
return -EINVAL;
if (!netdev->dcbnl_ops->getcap)
return -EOPNOTSUPP;
ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
dcbnl_cap_nest, NULL);
if (ret)
return ret;
nest = nla_nest_start(skb, DCB_ATTR_CAP);
if (!nest)
return -EMSGSIZE;
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(skb, i, value);
if (ret) {
nla_nest_cancel(skb, nest);
return ret;
}
}
}
nla_nest_end(skb, nest);
return 0;
}
static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
u8 value;
int ret;
int i;
int getall = 0;
if (!tb[DCB_ATTR_NUMTCS])
return -EINVAL;
if (!netdev->dcbnl_ops->getnumtcs)
return -EOPNOTSUPP;
ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
dcbnl_numtcs_nest, NULL);
if (ret)
return ret;
nest = nla_nest_start(skb, DCB_ATTR_NUMTCS);
if (!nest)
return -EMSGSIZE;
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(skb, i, value);
if (ret) {
nla_nest_cancel(skb, nest);
return ret;
}
} else
return -EINVAL;
}
nla_nest_end(skb, nest);
return 0;
}
static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
int ret;
u8 value;
int i;
if (!tb[DCB_ATTR_NUMTCS])
return -EINVAL;
if (!netdev->dcbnl_ops->setnumtcs)
return -EOPNOTSUPP;
ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
dcbnl_numtcs_nest, NULL);
if (ret)
return ret;
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)
break;
}
return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
}
static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
if (!netdev->dcbnl_ops->getpfcstate)
return -EOPNOTSUPP;
return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
netdev->dcbnl_ops->getpfcstate(netdev));
}
static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
u8 value;
if (!tb[DCB_ATTR_PFC_STATE])
return -EINVAL;
if (!netdev->dcbnl_ops->setpfcstate)
return -EOPNOTSUPP;
value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
netdev->dcbnl_ops->setpfcstate(netdev, value);
return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
}
static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *app_nest;
struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
u16 id;
u8 up, idtype;
int ret;
if (!tb[DCB_ATTR_APP])
return -EINVAL;
ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
dcbnl_app_nest, NULL);
if (ret)
return ret;
/* all must be non-null */
if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
(!app_tb[DCB_APP_ATTR_ID]))
return -EINVAL;
/* 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))
return -EINVAL;
id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
if (netdev->dcbnl_ops->getapp) {
ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
if (ret < 0)
return ret;
else
up = ret;
} else {
struct dcb_app app = {
.selector = idtype,
.protocol = id,
};
up = dcb_getapp(netdev, &app);
}
app_nest = nla_nest_start(skb, DCB_ATTR_APP);
if (!app_nest)
return -EMSGSIZE;
ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
if (ret)
goto out_cancel;
ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
if (ret)
goto out_cancel;
ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
if (ret)
goto out_cancel;
nla_nest_end(skb, app_nest);
return 0;
out_cancel:
nla_nest_cancel(skb, app_nest);
return ret;
}
static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
int ret;
u16 id;
u8 up, idtype;
struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
if (!tb[DCB_ATTR_APP])
return -EINVAL;
ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
dcbnl_app_nest, NULL);
if (ret)
return ret;
/* all must be non-null */
if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
(!app_tb[DCB_APP_ATTR_ID]) ||
(!app_tb[DCB_APP_ATTR_PRIORITY]))
return -EINVAL;
/* 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))
return -EINVAL;
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) {
ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
if (ret < 0)
return ret;
} else {
struct dcb_app app;
app.selector = idtype;
app.protocol = id;
app.priority = up;
ret = dcb_setapp(netdev, &app);
}
ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);
return ret;
}
static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
struct nlattr **tb, struct sk_buff *skb, int dir)
{
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;
int getall = 0;
int i;
if (!tb[DCB_ATTR_PG_CFG])
return -EINVAL;
if (!netdev->dcbnl_ops->getpgtccfgtx ||
!netdev->dcbnl_ops->getpgtccfgrx ||
!netdev->dcbnl_ops->getpgbwgcfgtx ||
!netdev->dcbnl_ops->getpgbwgcfgrx)
return -EOPNOTSUPP;
ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, tb[DCB_ATTR_PG_CFG],
dcbnl_pg_nest, NULL);
if (ret)
return ret;
pg_nest = nla_nest_start(skb, DCB_ATTR_PG_CFG);
if (!pg_nest)
return -EMSGSIZE;
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, NULL);
if (ret)
goto err_pg;
param_nest = nla_nest_start(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(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(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(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(skb, DCB_TC_ATTR_PARAM_BW_PCT,
tc_pct);
if (ret)
goto err_param;
}
nla_nest_end(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(skb, i, tc_pct);
if (ret)
goto err_pg;
}
nla_nest_end(skb, pg_nest);
return 0;
err_param:
nla_nest_cancel(skb, param_nest);
err_pg:
nla_nest_cancel(skb, pg_nest);
return -EMSGSIZE;
}
static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
}
static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
}
static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
u8 value;
if (!tb[DCB_ATTR_STATE])
return -EINVAL;
if (!netdev->dcbnl_ops->setstate)
return -EOPNOTSUPP;
value = nla_get_u8(tb[DCB_ATTR_STATE]);
return nla_put_u8(skb, DCB_ATTR_STATE,
netdev->dcbnl_ops->setstate(netdev, value));
}
static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
int i;
int ret;
u8 value;
if (!tb[DCB_ATTR_PFC_CFG])
return -EINVAL;
if (!netdev->dcbnl_ops->setpfccfg)
return -EOPNOTSUPP;
ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
tb[DCB_ATTR_PFC_CFG], dcbnl_pfc_up_nest, NULL);
if (ret)
return ret;
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);
}
return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
}
static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
int ret;
if (!tb[DCB_ATTR_SET_ALL])
return -EINVAL;
if (!netdev->dcbnl_ops->setall)
return -EOPNOTSUPP;
ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
netdev->dcbnl_ops->setall(netdev));
dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);
return ret;
}
static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb,
int dir)
{
struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
int ret;
int i;
u8 pgid;
u8 up_map;
u8 prio;
u8 tc_pct;
if (!tb[DCB_ATTR_PG_CFG])
return -EINVAL;
if (!netdev->dcbnl_ops->setpgtccfgtx ||
!netdev->dcbnl_ops->setpgtccfgrx ||
!netdev->dcbnl_ops->setpgbwgcfgtx ||
!netdev->dcbnl_ops->setpgbwgcfgrx)
return -EOPNOTSUPP;
ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX, tb[DCB_ATTR_PG_CFG],
dcbnl_pg_nest, NULL);
if (ret)
return ret;
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, NULL);
if (ret)
return ret;
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);
}
}
return nla_put_u8(skb, DCB_ATTR_PG_CFG, 0);
}
static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 0);
}
static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
return __dcbnl_pg_setcfg(netdev, nlh, seq, tb, skb, 1);
}
static int dcbnl_bcn_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *bcn_nest;
struct nlattr *bcn_tb[DCB_BCN_ATTR_MAX + 1];
u8 value_byte;
u32 value_integer;
int ret;
bool getall = false;
int i;
if (!tb[DCB_ATTR_BCN])
return -EINVAL;
if (!netdev->dcbnl_ops->getbcnrp ||
!netdev->dcbnl_ops->getbcncfg)
return -EOPNOTSUPP;
ret = nla_parse_nested(bcn_tb, DCB_BCN_ATTR_MAX, tb[DCB_ATTR_BCN],
dcbnl_bcn_nest, NULL);
if (ret)
return ret;
bcn_nest = nla_nest_start(skb, DCB_ATTR_BCN);
if (!bcn_nest)
return -EMSGSIZE;
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(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(skb, i, value_integer);
if (ret)
goto err_bcn;
}
nla_nest_end(skb, bcn_nest);
return 0;
err_bcn:
nla_nest_cancel(skb, bcn_nest);
return ret;
}
static int dcbnl_bcn_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
struct nlattr *data[DCB_BCN_ATTR_MAX + 1];
int i;
int ret;
u8 value_byte;
u32 value_int;
if (!tb[DCB_ATTR_BCN])
return -EINVAL;
if (!netdev->dcbnl_ops->setbcncfg ||
!netdev->dcbnl_ops->setbcnrp)
return -EOPNOTSUPP;
ret = nla_parse_nested(data, DCB_BCN_ATTR_MAX, tb[DCB_ATTR_BCN],
dcbnl_pfc_up_nest, NULL);
if (ret)
return ret;
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);
}
return nla_put_u8(skb, DCB_ATTR_BCN, 0);
}
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))
goto nla_put_failure;
for (i = 0; i < app_count; i++) {
if (nla_put(skb, app_entry_type, sizeof(struct dcb_app),
&table[i]))
goto nla_put_failure;
}
nla_nest_end(skb, app);
}
err = 0;
nla_put_failure:
kfree(table);
return err;
}
/* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb 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;
if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
return -EMSGSIZE;
ieee = nla_nest_start(skb, DCB_ATTR_IEEE);
if (!ieee)
return -EMSGSIZE;
if (ops->ieee_getets) {
struct ieee_ets ets;
memset(&ets, 0, sizeof(ets));
err = ops->ieee_getets(netdev, &ets);
if (!err &&
nla_put(skb, DCB_ATTR_IEEE_ETS, sizeof(ets), &ets))
return -EMSGSIZE;
}
if (ops->ieee_getmaxrate) {
struct ieee_maxrate maxrate;
memset(&maxrate, 0, sizeof(maxrate));
err = ops->ieee_getmaxrate(netdev, &maxrate);
if (!err) {
err = nla_put(skb, DCB_ATTR_IEEE_MAXRATE,
sizeof(maxrate), &maxrate);
if (err)
return -EMSGSIZE;
}
}
if (ops->ieee_getqcn) {
struct ieee_qcn qcn;
memset(&qcn, 0, sizeof(qcn));
err = ops->ieee_getqcn(netdev, &qcn);
if (!err) {
err = nla_put(skb, DCB_ATTR_IEEE_QCN,
sizeof(qcn), &qcn);
if (err)
return -EMSGSIZE;
}
}
if (ops->ieee_getqcnstats) {
struct ieee_qcn_stats qcn_stats;
memset(&qcn_stats, 0, sizeof(qcn_stats));
err = ops->ieee_getqcnstats(netdev, &qcn_stats);
if (!err) {
err = nla_put(skb, DCB_ATTR_IEEE_QCN_STATS,
sizeof(qcn_stats), &qcn_stats);
if (err)
return -EMSGSIZE;
}
}
if (ops->ieee_getpfc) {
struct ieee_pfc pfc;
memset(&pfc, 0, sizeof(pfc));
err = ops->ieee_getpfc(netdev, &pfc);
if (!err &&
nla_put(skb, DCB_ATTR_IEEE_PFC, sizeof(pfc), &pfc))
return -EMSGSIZE;
}
app = nla_nest_start(skb, DCB_ATTR_IEEE_APP_TABLE);
if (!app)
return -EMSGSIZE;
spin_lock_bh(&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_bh(&dcb_lock);
return -EMSGSIZE;
}
}
}
if (netdev->dcbnl_ops->getdcbx)
dcbx = netdev->dcbnl_ops->getdcbx(netdev);
else
dcbx = -EOPNOTSUPP;
spin_unlock_bh(&dcb_lock);
nla_nest_end(skb, app);
/* get peer info if available */
if (ops->ieee_peer_getets) {
struct ieee_ets ets;
memset(&ets, 0, sizeof(ets));
err = ops->ieee_peer_getets(netdev, &ets);
if (!err &&
nla_put(skb, DCB_ATTR_IEEE_PEER_ETS, sizeof(ets), &ets))
return -EMSGSIZE;
}
if (ops->ieee_peer_getpfc) {
struct ieee_pfc pfc;
memset(&pfc, 0, sizeof(pfc));
err = ops->ieee_peer_getpfc(netdev, &pfc);
if (!err &&
nla_put(skb, DCB_ATTR_IEEE_PEER_PFC, sizeof(pfc), &pfc))
return -EMSGSIZE;
}
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)
return -EMSGSIZE;
}
nla_nest_end(skb, ieee);
if (dcbx >= 0) {
err = nla_put_u8(skb, DCB_ATTR_DCBX, dcbx);
if (err)
return -EMSGSIZE;
}
return 0;
}
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)
return -EMSGSIZE;
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)
return -EMSGSIZE;
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);
if (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))
return -EMSGSIZE;
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);
if (nla_put_u8(skb, i, tc_pct))
return -EMSGSIZE;
}
nla_nest_end(skb, pg);
return 0;
}
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;
if (nla_put_string(skb, DCB_ATTR_IFNAME, netdev->name))
goto nla_put_failure;
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);
if (nla_put_u8(skb, i, value))
goto nla_put_failure;
}
nla_nest_end(skb, pfc_nest);
}
/* local app */
spin_lock_bh(&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_bh(&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))
goto nla_put_failure;
nla_nest_end(skb, feat);
}
/* peer info if available */
if (ops->cee_peer_getpg) {
struct cee_pg pg;
memset(&pg, 0, sizeof(pg));
err = ops->cee_peer_getpg(netdev, &pg);
if (!err &&
nla_put(skb, DCB_ATTR_CEE_PEER_PG, sizeof(pg), &pg))
goto nla_put_failure;
}
if (ops->cee_peer_getpfc) {
struct cee_pfc pfc;
memset(&pfc, 0, sizeof(pfc));
err = ops->cee_peer_getpfc(netdev, &pfc);
if (!err &&
nla_put(skb, DCB_ATTR_CEE_PEER_PFC, sizeof(pfc), &pfc))
goto nla_put_failure;
}
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_bh(&dcb_lock);
nla_put_failure:
err = -EMSGSIZE;
return err;
}
static int dcbnl_notify(struct net_device *dev, int event, int cmd,
u32 seq, u32 portid, int dcbx_ver)
{
struct net *net = dev_net(dev);
struct sk_buff *skb;
struct nlmsghdr *nlh;
const struct dcbnl_rtnl_ops *ops = dev->dcbnl_ops;
int err;
if (!ops)
return -EOPNOTSUPP;
skb = dcbnl_newmsg(event, cmd, portid, seq, 0, &nlh);
if (!skb)
return -ENOBUFS;
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_free(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 portid)
{
return dcbnl_notify(dev, event, cmd, seq, portid, 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 portid)
{
return dcbnl_notify(dev, event, cmd, seq, portid, DCB_CAP_DCBX_VER_CEE);
}
EXPORT_SYMBOL(dcbnl_cee_notify);
/* Handle IEEE 802.1Qaz/802.1Qau/802.1Qbb 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 nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
int err;
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, NULL);
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_MAXRATE] && ops->ieee_setmaxrate) {
struct ieee_maxrate *maxrate =
nla_data(ieee[DCB_ATTR_IEEE_MAXRATE]);
err = ops->ieee_setmaxrate(netdev, maxrate);
if (err)
goto err;
}
if (ieee[DCB_ATTR_IEEE_QCN] && ops->ieee_setqcn) {
struct ieee_qcn *qcn =
nla_data(ieee[DCB_ATTR_IEEE_QCN]);
err = ops->ieee_setqcn(netdev, qcn);
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;
if (nla_len(attr) < sizeof(struct dcb_app)) {
err = -ERANGE;
goto err;
}
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:
err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);
return err;
}
static int dcbnl_ieee_get(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
if (!ops)
return -EOPNOTSUPP;
return dcbnl_ieee_fill(skb, netdev);
}
static int dcbnl_ieee_del(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
struct nlattr *ieee[DCB_ATTR_IEEE_MAX + 1];
int err;
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, NULL);
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:
err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
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 nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
if (!netdev->dcbnl_ops->getdcbx)
return -EOPNOTSUPP;
return nla_put_u8(skb, DCB_ATTR_DCBX,
netdev->dcbnl_ops->getdcbx(netdev));
}
static int dcbnl_setdcbx(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
u8 value;
if (!netdev->dcbnl_ops->setdcbx)
return -EOPNOTSUPP;
if (!tb[DCB_ATTR_DCBX])
return -EINVAL;
value = nla_get_u8(tb[DCB_ATTR_DCBX]);
return nla_put_u8(skb, DCB_ATTR_DCBX,
netdev->dcbnl_ops->setdcbx(netdev, value));
}
static int dcbnl_getfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
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, NULL);
if (ret)
return ret;
nest = nla_nest_start(skb, DCB_ATTR_FEATCFG);
if (!nest)
return -EMSGSIZE;
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(skb, i, value);
if (ret) {
nla_nest_cancel(skb, nest);
goto nla_put_failure;
}
}
nla_nest_end(skb, nest);
nla_put_failure:
return ret;
}
static int dcbnl_setfeatcfg(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
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, NULL);
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:
ret = nla_put_u8(skb, DCB_ATTR_FEATCFG, ret);
return ret;
}
/* Handle CEE DCBX GET commands. */
static int dcbnl_cee_get(struct net_device *netdev, struct nlmsghdr *nlh,
u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
const struct dcbnl_rtnl_ops *ops = netdev->dcbnl_ops;
if (!ops)
return -EOPNOTSUPP;
return dcbnl_cee_fill(skb, netdev);
}
struct reply_func {
/* reply netlink message type */
int type;
/* function to fill message contents */
int (*cb)(struct net_device *, struct nlmsghdr *, u32,
struct nlattr **, struct sk_buff *);
};
static const struct reply_func reply_funcs[DCB_CMD_MAX+1] = {
[DCB_CMD_GSTATE] = { RTM_GETDCB, dcbnl_getstate },
[DCB_CMD_SSTATE] = { RTM_SETDCB, dcbnl_setstate },
[DCB_CMD_PFC_GCFG] = { RTM_GETDCB, dcbnl_getpfccfg },
[DCB_CMD_PFC_SCFG] = { RTM_SETDCB, dcbnl_setpfccfg },
[DCB_CMD_GPERM_HWADDR] = { RTM_GETDCB, dcbnl_getperm_hwaddr },
[DCB_CMD_GCAP] = { RTM_GETDCB, dcbnl_getcap },
[DCB_CMD_GNUMTCS] = { RTM_GETDCB, dcbnl_getnumtcs },
[DCB_CMD_SNUMTCS] = { RTM_SETDCB, dcbnl_setnumtcs },
[DCB_CMD_PFC_GSTATE] = { RTM_GETDCB, dcbnl_getpfcstate },
[DCB_CMD_PFC_SSTATE] = { RTM_SETDCB, dcbnl_setpfcstate },
[DCB_CMD_GAPP] = { RTM_GETDCB, dcbnl_getapp },
[DCB_CMD_SAPP] = { RTM_SETDCB, dcbnl_setapp },
[DCB_CMD_PGTX_GCFG] = { RTM_GETDCB, dcbnl_pgtx_getcfg },
[DCB_CMD_PGTX_SCFG] = { RTM_SETDCB, dcbnl_pgtx_setcfg },
[DCB_CMD_PGRX_GCFG] = { RTM_GETDCB, dcbnl_pgrx_getcfg },
[DCB_CMD_PGRX_SCFG] = { RTM_SETDCB, dcbnl_pgrx_setcfg },
[DCB_CMD_SET_ALL] = { RTM_SETDCB, dcbnl_setall },
[DCB_CMD_BCN_GCFG] = { RTM_GETDCB, dcbnl_bcn_getcfg },
[DCB_CMD_BCN_SCFG] = { RTM_SETDCB, dcbnl_bcn_setcfg },
[DCB_CMD_IEEE_GET] = { RTM_GETDCB, dcbnl_ieee_get },
[DCB_CMD_IEEE_SET] = { RTM_SETDCB, dcbnl_ieee_set },
[DCB_CMD_IEEE_DEL] = { RTM_SETDCB, dcbnl_ieee_del },
[DCB_CMD_GDCBX] = { RTM_GETDCB, dcbnl_getdcbx },
[DCB_CMD_SDCBX] = { RTM_SETDCB, dcbnl_setdcbx },
[DCB_CMD_GFEATCFG] = { RTM_GETDCB, dcbnl_getfeatcfg },
[DCB_CMD_SFEATCFG] = { RTM_SETDCB, dcbnl_setfeatcfg },
[DCB_CMD_CEE_GET] = { RTM_GETDCB, dcbnl_cee_get },
};
static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct net_device *netdev;
struct dcbmsg *dcb = nlmsg_data(nlh);
struct nlattr *tb[DCB_ATTR_MAX + 1];
u32 portid = skb ? NETLINK_CB(skb).portid : 0;
int ret = -EINVAL;
struct sk_buff *reply_skb;
struct nlmsghdr *reply_nlh = NULL;
const struct reply_func *fn;
if ((nlh->nlmsg_type == RTM_SETDCB) && !netlink_capable(skb, CAP_NET_ADMIN))
return -EPERM;
ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
dcbnl_rtnl_policy, extack);
if (ret < 0)
return ret;
if (dcb->cmd > DCB_CMD_MAX)
return -EINVAL;
/* check if a reply function has been defined for the command */
fn = &reply_funcs[dcb->cmd];
if (!fn->cb)
return -EOPNOTSUPP;
if (!tb[DCB_ATTR_IFNAME])
return -EINVAL;
netdev = __dev_get_by_name(net, nla_data(tb[DCB_ATTR_IFNAME]));
if (!netdev)
return -ENODEV;
if (!netdev->dcbnl_ops)
return -EOPNOTSUPP;
reply_skb = dcbnl_newmsg(fn->type, dcb->cmd, portid, nlh->nlmsg_seq,
nlh->nlmsg_flags, &reply_nlh);
if (!reply_skb)
return -ENOBUFS;
ret = fn->cb(netdev, nlh, nlh->nlmsg_seq, tb, reply_skb);
if (ret < 0) {
nlmsg_free(reply_skb);
goto out;
}
nlmsg_end(reply_skb, reply_nlh);
ret = rtnl_unicast(reply_skb, net, portid);
out:
return ret;
}
static struct dcb_app_type *dcb_app_lookup(const struct dcb_app *app,
int ifindex, int prio)
{
struct dcb_app_type *itr;
list_for_each_entry(itr, &dcb_app_list, list) {
if (itr->app.selector == app->selector &&
itr->app.protocol == app->protocol &&
itr->ifindex == ifindex &&
(!prio || itr->app.priority == prio))
return itr;
}
return NULL;
}
static int dcb_app_add(const struct dcb_app *app, int ifindex)
{
struct dcb_app_type *entry;
entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
if (!entry)
return -ENOMEM;
memcpy(&entry->app, app, sizeof(*app));
entry->ifindex = ifindex;
list_add(&entry->list, &dcb_app_list);
return 0;
}
/**
* 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_bh(&dcb_lock);
if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
prio = itr->app.priority;
spin_unlock_bh(&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. Priority is expected to be 8-bit 802.1p user priority bitmap
*/
int dcb_setapp(struct net_device *dev, struct dcb_app *new)
{
struct dcb_app_type *itr;
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_bh(&dcb_lock);
/* Search for existing match and replace */
if ((itr = dcb_app_lookup(new, dev->ifindex, 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)
err = dcb_app_add(new, dev->ifindex);
out:
spin_unlock_bh(&dcb_lock);
if (!err)
call_dcbevent_notifiers(DCB_APP_EVENT, &event);
return err;
}
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_bh(&dcb_lock);
if ((itr = dcb_app_lookup(app, dev->ifindex, 0)))
prio |= 1 << itr->app.priority;
spin_unlock_bh(&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. Priority is expected to be a
* 3-bit unsigned integer
*/
int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
{
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_bh(&dcb_lock);
/* Search for existing match and abort if found */
if (dcb_app_lookup(new, dev->ifindex, new->priority)) {
err = -EEXIST;
goto out;
}
err = dcb_app_add(new, dev->ifindex);
out:
spin_unlock_bh(&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_bh(&dcb_lock);
/* Search for existing match and remove it. */
if ((itr = dcb_app_lookup(del, dev->ifindex, del->priority))) {
list_del(&itr->list);
kfree(itr);
err = 0;
}
spin_unlock_bh(&dcb_lock);
if (!err)
call_dcbevent_notifiers(DCB_APP_EVENT, &event);
return err;
}
EXPORT_SYMBOL(dcb_ieee_delapp);
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;
}
device_initcall(dcbnl_init);
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