ipv6: AF_INET6 link address family
IPv6 already exposes some address family data via netlink in the IFLA_PROTINFO attribute if RTM_GETLINK request is sent with the address family set to AF_INET6. We take over this format and reuse all the code. Signed-off-by: Thomas Graf <tgraf@infradead.org> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -3831,6 +3831,15 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
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array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
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}
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static inline size_t inet6_ifla6_size(void)
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{
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return nla_total_size(4) /* IFLA_INET6_FLAGS */
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+ nla_total_size(sizeof(struct ifla_cacheinfo))
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+ nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
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+ nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
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+ nla_total_size(ICMP6_MIB_MAX * 8); /* IFLA_INET6_ICMP6STATS */
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}
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static inline size_t inet6_if_nlmsg_size(void)
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{
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return NLMSG_ALIGN(sizeof(struct ifinfomsg))
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@ -3838,13 +3847,7 @@ static inline size_t inet6_if_nlmsg_size(void)
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+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
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+ nla_total_size(4) /* IFLA_MTU */
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+ nla_total_size(4) /* IFLA_LINK */
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+ nla_total_size( /* IFLA_PROTINFO */
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nla_total_size(4) /* IFLA_INET6_FLAGS */
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+ nla_total_size(sizeof(struct ifla_cacheinfo))
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+ nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
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+ nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
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+ nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
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);
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+ nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
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}
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static inline void __snmp6_fill_stats(u64 *stats, void __percpu **mib,
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@ -3891,41 +3894,11 @@ static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
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}
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}
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static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
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u32 pid, u32 seq, int event, unsigned int flags)
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static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
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{
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struct net_device *dev = idev->dev;
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struct nlattr *nla;
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struct ifinfomsg *hdr;
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struct nlmsghdr *nlh;
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void *protoinfo;
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struct ifla_cacheinfo ci;
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nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
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if (nlh == NULL)
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return -EMSGSIZE;
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hdr = nlmsg_data(nlh);
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hdr->ifi_family = AF_INET6;
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hdr->__ifi_pad = 0;
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hdr->ifi_type = dev->type;
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hdr->ifi_index = dev->ifindex;
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hdr->ifi_flags = dev_get_flags(dev);
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hdr->ifi_change = 0;
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NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
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if (dev->addr_len)
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NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
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NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
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if (dev->ifindex != dev->iflink)
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NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
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protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
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if (protoinfo == NULL)
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goto nla_put_failure;
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NLA_PUT_U32(skb, IFLA_INET6_FLAGS, idev->if_flags);
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ci.max_reasm_len = IPV6_MAXPLEN;
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@ -3952,6 +3925,74 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
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goto nla_put_failure;
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snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
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return 0;
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nla_put_failure:
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return -EMSGSIZE;
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}
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static size_t inet6_get_link_af_size(const struct net_device *dev)
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{
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if (!__in6_dev_get(dev))
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return 0;
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return inet6_ifla6_size();
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}
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static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
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{
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struct inet6_dev *idev = __in6_dev_get(dev);
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if (!idev)
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return -ENODATA;
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if (inet6_fill_ifla6_attrs(skb, idev) < 0)
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return -EMSGSIZE;
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return 0;
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}
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static int inet6_parse_link_af(struct net_device *dev, const struct nlattr *nla)
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{
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return -EOPNOTSUPP;
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}
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static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
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u32 pid, u32 seq, int event, unsigned int flags)
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{
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struct net_device *dev = idev->dev;
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struct ifinfomsg *hdr;
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struct nlmsghdr *nlh;
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void *protoinfo;
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nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
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if (nlh == NULL)
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return -EMSGSIZE;
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hdr = nlmsg_data(nlh);
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hdr->ifi_family = AF_INET6;
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hdr->__ifi_pad = 0;
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hdr->ifi_type = dev->type;
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hdr->ifi_index = dev->ifindex;
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hdr->ifi_flags = dev_get_flags(dev);
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hdr->ifi_change = 0;
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NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
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if (dev->addr_len)
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NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
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NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
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if (dev->ifindex != dev->iflink)
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NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
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protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
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if (protoinfo == NULL)
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goto nla_put_failure;
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if (inet6_fill_ifla6_attrs(skb, idev) < 0)
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goto nla_put_failure;
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nla_nest_end(skb, protoinfo);
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return nlmsg_end(skb, nlh);
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@ -4621,6 +4662,13 @@ int unregister_inet6addr_notifier(struct notifier_block *nb)
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}
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EXPORT_SYMBOL(unregister_inet6addr_notifier);
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static struct rtnl_af_ops inet6_ops = {
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.family = AF_INET6,
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.fill_link_af = inet6_fill_link_af,
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.get_link_af_size = inet6_get_link_af_size,
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.parse_link_af = inet6_parse_link_af,
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};
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/*
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* Init / cleanup code
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*/
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@ -4672,6 +4720,10 @@ int __init addrconf_init(void)
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addrconf_verify(0);
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err = rtnl_af_register(&inet6_ops);
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if (err < 0)
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goto errout_af;
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err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
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if (err < 0)
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goto errout;
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@ -4687,6 +4739,8 @@ int __init addrconf_init(void)
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return 0;
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errout:
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rtnl_af_unregister(&inet6_ops);
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errout_af:
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unregister_netdevice_notifier(&ipv6_dev_notf);
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errlo:
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unregister_pernet_subsys(&addrconf_ops);
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@ -4707,6 +4761,8 @@ void addrconf_cleanup(void)
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rtnl_lock();
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__rtnl_af_unregister(&inet6_ops);
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/* clean dev list */
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for_each_netdev(&init_net, dev) {
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if (__in6_dev_get(dev) == NULL)
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