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netconf: advertise mc_forwarding status

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This patch advertise the MC_FORWARDING status for IPv4 and IPv6.
This field is readonly, only multicast engine in the kernel updates it.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2012-12-04 01:13:35 +00:00 committed by David S. Miller
parent e8ad1a8fab
commit d67b8c616b
7 changed files with 53 additions and 6 deletions
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3
include/linux/inetdevice.h
View file

@ -171,6 +171,9 @@ struct in_ifaddr {
extern int register_inetaddr_notifier(struct notifier_block *nb);
extern int unregister_inetaddr_notifier(struct notifier_block *nb);
extern void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
struct ipv4_devconf *devconf);
extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
{

3
include/net/addrconf.h
View file

@ -172,6 +172,9 @@ extern bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
extern int register_inet6addr_notifier(struct notifier_block *nb);
extern int unregister_inet6addr_notifier(struct notifier_block *nb);
extern void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
struct ipv6_devconf *devconf);
/**
* __in6_dev_get - get inet6_dev pointer from netdevice
* @dev: network device

1
include/uapi/linux/netconf.h
View file

@ -13,6 +13,7 @@ enum {
NETCONFA_IFINDEX,
NETCONFA_FORWARDING,
NETCONFA_RP_FILTER,
NETCONFA_MC_FORWARDING,
__NETCONFA_MAX
};
#define NETCONFA_MAX (__NETCONFA_MAX - 1)

10
net/ipv4/devinet.c
View file

@ -1453,6 +1453,8 @@ static int inet_netconf_msgsize_devconf(int type)
size += nla_total_size(4);
if (type == -1 || type == NETCONFA_RP_FILTER)
size += nla_total_size(4);
if (type == -1 || type == NETCONFA_MC_FORWARDING)
size += nla_total_size(4);
return size;
}
@ -1485,6 +1487,10 @@ static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
nla_put_s32(skb, NETCONFA_RP_FILTER,
IPV4_DEVCONF(*devconf, RP_FILTER)) < 0)
goto nla_put_failure;
if ((type == -1 || type == NETCONFA_MC_FORWARDING) &&
nla_put_s32(skb, NETCONFA_MC_FORWARDING,
IPV4_DEVCONF(*devconf, MC_FORWARDING)) < 0)
goto nla_put_failure;
return nlmsg_end(skb, nlh);
@ -1493,8 +1499,8 @@ static int inet_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
return -EMSGSIZE;
}
static void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
struct ipv4_devconf *devconf)
void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
struct ipv4_devconf *devconf)
{
struct sk_buff *skb;
int err = -ENOBUFS;

12
net/ipv4/ipmr.c
View file

@ -65,6 +65,7 @@
#include <net/checksum.h>
#include <net/netlink.h>
#include <net/fib_rules.h>
#include <linux/netconf.h>
#if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2)
#define CONFIG_IP_PIMSM 1
@ -582,6 +583,9 @@ static int vif_delete(struct mr_table *mrt, int vifi, int notify,
in_dev = __in_dev_get_rtnl(dev);
if (in_dev) {
IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)--;
inet_netconf_notify_devconf(dev_net(dev),
NETCONFA_MC_FORWARDING,
dev->ifindex, &in_dev->cnf);
ip_rt_multicast_event(in_dev);
}
@ -772,6 +776,8 @@ static int vif_add(struct net *net, struct mr_table *mrt,
return -EADDRNOTAVAIL;
}
IPV4_DEVCONF(in_dev->cnf, MC_FORWARDING)++;
inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, dev->ifindex,
&in_dev->cnf);
ip_rt_multicast_event(in_dev);
/* Fill in the VIF structures */
@ -1185,6 +1191,9 @@ static void mrtsock_destruct(struct sock *sk)
ipmr_for_each_table(mrt, net) {
if (sk == rtnl_dereference(mrt->mroute_sk)) {
IPV4_DEVCONF_ALL(net, MC_FORWARDING)--;
inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING,
NETCONFA_IFINDEX_ALL,
net->ipv4.devconf_all);
RCU_INIT_POINTER(mrt->mroute_sk, NULL);
mroute_clean_tables(mrt);
}
@ -1236,6 +1245,9 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi
if (ret == 0) {
rcu_assign_pointer(mrt->mroute_sk, sk);
IPV4_DEVCONF_ALL(net, MC_FORWARDING)++;
inet_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING,
NETCONFA_IFINDEX_ALL,
net->ipv4.devconf_all);
}
rtnl_unlock();
return ret;

10
net/ipv6/addrconf.c
View file

@ -469,6 +469,8 @@ static int inet6_netconf_msgsize_devconf(int type)
/* type -1 is used for ALL */
if (type == -1 || type == NETCONFA_FORWARDING)
size += nla_total_size(4);
if (type == -1 || type == NETCONFA_MC_FORWARDING)
size += nla_total_size(4);
return size;
}
@ -496,6 +498,10 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
if ((type == -1 || type == NETCONFA_FORWARDING) &&
nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
goto nla_put_failure;
if ((type == -1 || type == NETCONFA_MC_FORWARDING) &&
nla_put_s32(skb, NETCONFA_MC_FORWARDING,
devconf->mc_forwarding) < 0)
goto nla_put_failure;
return nlmsg_end(skb, nlh);
@ -504,8 +510,8 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
return -EMSGSIZE;
}
static void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
struct ipv6_devconf *devconf)
void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
struct ipv6_devconf *devconf)
{
struct sk_buff *skb;
int err = -ENOBUFS;

20
net/ipv6/ip6mr.c
View file

@ -52,6 +52,7 @@
#include <linux/netfilter_ipv6.h>
#include <linux/export.h>
#include <net/ip6_checksum.h>
#include <linux/netconf.h>
struct mr6_table {
struct list_head list;
@ -805,8 +806,12 @@ static int mif6_delete(struct mr6_table *mrt, int vifi, struct list_head *head)
dev_set_allmulti(dev, -1);
in6_dev = __in6_dev_get(dev);
if (in6_dev)
if (in6_dev) {
in6_dev->cnf.mc_forwarding--;
inet6_netconf_notify_devconf(dev_net(dev),
NETCONFA_MC_FORWARDING,
dev->ifindex, &in6_dev->cnf);
}
if (v->flags & MIFF_REGISTER)
unregister_netdevice_queue(dev, head);
@ -958,8 +963,12 @@ static int mif6_add(struct net *net, struct mr6_table *mrt,
}
in6_dev = __in6_dev_get(dev);
if (in6_dev)
if (in6_dev) {
in6_dev->cnf.mc_forwarding++;
inet6_netconf_notify_devconf(dev_net(dev),
NETCONFA_MC_FORWARDING,
dev->ifindex, &in6_dev->cnf);
}
/*
* Fill in the VIF structures
@ -1513,6 +1522,9 @@ static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk)
if (likely(mrt->mroute6_sk == NULL)) {
mrt->mroute6_sk = sk;
net->ipv6.devconf_all->mc_forwarding++;
inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING,
NETCONFA_IFINDEX_ALL,
net->ipv6.devconf_all);
}
else
err = -EADDRINUSE;
@ -1535,6 +1547,10 @@ int ip6mr_sk_done(struct sock *sk)
write_lock_bh(&mrt_lock);
mrt->mroute6_sk = NULL;
net->ipv6.devconf_all->mc_forwarding--;
inet6_netconf_notify_devconf(net,
NETCONFA_MC_FORWARDING,
NETCONFA_IFINDEX_ALL,
net->ipv6.devconf_all);
write_unlock_bh(&mrt_lock);
mroute_clean_tables(mrt);