forked from luck/tmp_suning_uos_patched
rtnl/ipv6: use netconf msg to advertise forwarding status
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
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d900082bd9
commit
f3a1bfb11c
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@ -592,6 +592,8 @@ enum rtnetlink_groups {
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#define RTNLGRP_PHONET_ROUTE RTNLGRP_PHONET_ROUTE
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RTNLGRP_DCB,
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#define RTNLGRP_DCB RTNLGRP_DCB
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RTNLGRP_IPV6_NETCONF,
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#define RTNLGRP_IPV6_NETCONF RTNLGRP_IPV6_NETCONF
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__RTNLGRP_MAX
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};
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#define RTNLGRP_MAX (__RTNLGRP_MAX - 1)
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@ -81,6 +81,7 @@
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#include <net/pkt_sched.h>
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#include <linux/if_tunnel.h>
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#include <linux/rtnetlink.h>
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#include <linux/netconf.h>
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#ifdef CONFIG_IPV6_PRIVACY
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#include <linux/random.h>
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@ -460,6 +461,72 @@ static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
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return idev;
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}
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static int inet6_netconf_msgsize_devconf(int type)
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{
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int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
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+ nla_total_size(4); /* NETCONFA_IFINDEX */
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if (type == NETCONFA_FORWARDING)
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size += nla_total_size(4);
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return size;
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}
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static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
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struct ipv6_devconf *devconf, u32 portid,
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u32 seq, int event, unsigned int flags,
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int type)
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{
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struct nlmsghdr *nlh;
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struct netconfmsg *ncm;
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nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
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flags);
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if (nlh == NULL)
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return -EMSGSIZE;
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ncm = nlmsg_data(nlh);
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ncm->ncm_family = AF_INET6;
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if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
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goto nla_put_failure;
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if (type == NETCONFA_FORWARDING &&
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nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
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goto nla_put_failure;
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return nlmsg_end(skb, nlh);
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nla_put_failure:
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nlmsg_cancel(skb, nlh);
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return -EMSGSIZE;
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}
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static void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
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struct ipv6_devconf *devconf)
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{
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struct sk_buff *skb;
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int err = -ENOBUFS;
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skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC);
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if (skb == NULL)
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goto errout;
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err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
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RTM_NEWNETCONF, 0, type);
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if (err < 0) {
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/* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
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WARN_ON(err == -EMSGSIZE);
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kfree_skb(skb);
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goto errout;
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}
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rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC);
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return;
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errout:
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if (err < 0)
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rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
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}
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#ifdef CONFIG_SYSCTL
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static void dev_forward_change(struct inet6_dev *idev)
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{
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@ -486,6 +553,8 @@ static void dev_forward_change(struct inet6_dev *idev)
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else
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addrconf_leave_anycast(ifa);
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}
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inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
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dev->ifindex, &idev->cnf);
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}
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@ -518,6 +587,10 @@ static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
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*p = newf;
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if (p == &net->ipv6.devconf_dflt->forwarding) {
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if ((!newf) ^ (!old))
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inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
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NETCONFA_IFINDEX_DEFAULT,
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net->ipv6.devconf_dflt);
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rtnl_unlock();
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return 0;
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}
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@ -525,6 +598,10 @@ static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
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if (p == &net->ipv6.devconf_all->forwarding) {
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net->ipv6.devconf_dflt->forwarding = newf;
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addrconf_forward_change(net, newf);
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if ((!newf) ^ (!old))
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inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
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NETCONFA_IFINDEX_ALL,
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net->ipv6.devconf_all);
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} else if ((!newf) ^ (!old))
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dev_forward_change((struct inet6_dev *)table->extra1);
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rtnl_unlock();
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