From d67b8c616b48df30e2836d797795f2420d109bc9 Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Tue, 4 Dec 2012 01:13:35 +0000 Subject: [PATCH] netconf: advertise mc_forwarding status 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 Signed-off-by: David S. Miller --- include/linux/inetdevice.h | 3 +++ include/net/addrconf.h | 3 +++ include/uapi/linux/netconf.h | 1 + net/ipv4/devinet.c | 10 ++++++++-- net/ipv4/ipmr.c | 12 ++++++++++++ net/ipv6/addrconf.c | 10 ++++++++-- net/ipv6/ip6mr.c | 20 ++++++++++++++++++-- 7 files changed, 53 insertions(+), 6 deletions(-) diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h index d032780d0ce5..a9d828976a77 100644 --- a/include/linux/inetdevice.h +++ b/include/linux/inetdevice.h @@ -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) { diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 9e63e76b20e7..df4ef9453384 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -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 diff --git a/include/uapi/linux/netconf.h b/include/uapi/linux/netconf.h index 75dcbc587fb5..64804a798b0c 100644 --- a/include/uapi/linux/netconf.h +++ b/include/uapi/linux/netconf.h @@ -13,6 +13,7 @@ enum { NETCONFA_IFINDEX, NETCONFA_FORWARDING, NETCONFA_RP_FILTER, + NETCONFA_MC_FORWARDING, __NETCONFA_MAX }; #define NETCONFA_MAX (__NETCONFA_MAX - 1) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index e13183abd7f6..cc06a47f1216 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -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; diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 58e4160fdcee..0c452e3fdc1b 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -65,6 +65,7 @@ #include #include #include +#include #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; diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 22ae75d54017..28e0e627229c 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -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; diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 926ea544f499..1c05fe604d37 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -52,6 +52,7 @@ #include #include #include +#include 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); -- GitLab