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linux/net/dcb/dcbnl.c
Don Skidmore f4314e815e net: add DCNA attribute to the BCN interface for DCB 
Adds the Backward Congestion Notification Address (BCNA) attribute to the
Backward Congestion Notification (BCN) interface for Data Center Bridging
(DCB), which was missing.  Receive the BCNA attribute in the ixgbe driver.
The BCNA attribute is for a switch to inform the endstation about the physical
port identification in order to support BCN on aggregated links.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Eric W Multanen <eric.w.multanen@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2008-12-21 20:10:29 -08:00

1123 lines
29 KiB
C
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/*
* Copyright (c) 2008, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Author: Lucy Liu <lucy.liu@intel.com>
*/
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <net/netlink.h>
#include <net/rtnetlink.h>
#include <linux/dcbnl.h>
#include <linux/rtnetlink.h>
#include <net/sock.h>
/**
* Data Center Bridging (DCB) is a collection of Ethernet enhancements
* intended to allow network traffic with differing requirements
* (highly reliable, no drops vs. best effort vs. low latency) to operate
* and co-exist on Ethernet. Current DCB features are:
*
* Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
* framework for assigning bandwidth guarantees to traffic classes.
*
* Priority-based Flow Control (PFC) - provides a flow control mechanism which
* can work independently for each 802.1p priority.
*
* Congestion Notification - provides a mechanism for end-to-end congestion
* control for protocols which do not have built-in congestion management.
*
* More information about the emerging standards for these Ethernet features
* can be found at: http://www.ieee802.org/1/pages/dcbridges.html
*
* This file implements an rtnetlink interface to allow configuration of DCB
* features for capable devices.
*/
MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
MODULE_DESCRIPTION("Data Center Bridging netlink interface");
MODULE_LICENSE("GPL");
/**************** DCB attribute policies *************************************/
/* DCB netlink attributes policy */
static 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 priority flow control to User Priority nested attributes */
static 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 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 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 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 capabilities nested attributes. */
static 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 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},
};
/* 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)
goto err;
return 0;
nlmsg_failure:
err:
kfree(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;
return 0;
nlmsg_failure:
err:
kfree(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;
return 0;
nlmsg_failure:
err:
kfree(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;
return 0;
nlmsg_failure:
err:
kfree(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;
}
return 0;
nlmsg_failure:
err:
kfree(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_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;
return 0;
err_param:
nla_nest_cancel(dcbnl_skb, param_nest);
err_pg:
nla_nest_cancel(dcbnl_skb, pg_nest);
nlmsg_failure:
err:
kfree(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;
return 0;
err_bcn:
nla_nest_cancel(dcbnl_skb, bcn_nest);
nlmsg_failure:
err:
kfree(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 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 != &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;
default:
goto errout;
}
errout:
ret = -EINVAL;
out:
dev_put(netdev);
return ret;
}
static int __init dcbnl_init(void)
{
rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, 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);
}
module_exit(dcbnl_exit);
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