adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-30 20:56:23 +00:00
Code Issues Projects Releases Packages Wiki Activity
aha/net/dcb/dcbnl.c
John Fastabend 7eaf5077b3 net: fix double skb free in dcbnl 
netlink_unicast() calls kfree_skb even in the error case.

dcbnl calls netlink_unicast() which when it fails free's the
skb and returns an error value.  dcbnl is free'ing the skb
again when this error occurs.  This patch removes the double
free.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-26 20:16:15 -07:00

1251 lines
32 KiB
C
Raw Blame History

/*
* 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_ATTR_APP] = {.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},
};
/* DCB APP nested attributes. */
static 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},
};
/* 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] || !netdev->dcbnl_ops->getapp)
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]);
up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
/* 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);
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 ret = -EINVAL;
u16 id;
u8 up, idtype;
struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->setapp)
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]);
ret = dcbnl_reply(netdev->dcbnl_ops->setapp(netdev, idtype, id, up),
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 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;
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;
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);
Reference in a new issue View git blame Copy permalink