[IPV6] SNMP: Netlink interface.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 49 insertions, 5 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1486f76f7878..9ba9e92d1934 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3433,6 +3433,8 @@ static inline size_t inet6_if_nlmsg_size(void)
                         nla_total_size(4) /* IFLA_INET6_FLAGS */
                         + nla_total_size(sizeof(struct ifla_cacheinfo))
                         + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
+                        + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
+                        + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
                  );
 }
 
@@ -3440,7 +3442,7 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
                              u32 pid, u32 seq, int event, unsigned int flags)
 {
         struct net_device *dev = idev->dev;
-        struct nlattr *conf;
+        struct nlattr *nla;
         struct ifinfomsg *hdr;
         struct nlmsghdr *nlh;
         void *protoinfo;
@@ -3480,12 +3482,22 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
         ci.retrans_time = idev->nd_parms->retrans_time;
         NLA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
 
-        conf = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
-        if (conf == NULL)
+        nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
+        if (nla == NULL)
                 goto nla_put_failure;
-        ipv6_store_devconf(&idev->cnf, nla_data(conf), nla_len(conf));
+        ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
 
-        /* XXX - Statistics/MC not implemented */
+        /* XXX - MC not implemented */
+
+        nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
+        if (nla == NULL)
+                goto nla_put_failure;
+        snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
+
+        nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
+        if (nla == NULL)
+                goto nla_put_failure;
+        snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
 
         nla_nest_end(skb, protoinfo);
         return nlmsg_end(skb, nlh);
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index fa3fb509f187..0dc551501519 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -207,6 +207,31 @@ static const struct file_operations snmp6_seq_fops = {
         .release = single_release,
 };
 
+static inline void
+__snmp6_fill_stats(u64 *stats, void **mib, int items, int bytes)
+{
+        int i;
+        int pad = bytes - sizeof(u64) * items;
+        BUG_ON(pad < 0);
+        stats[0] = items;
+        for (i = 1; i < items; i++)
+                stats[i] = (u64)fold_field(mib, i);
+        memset(&stats[items], 0, pad);
+}
+
+void
+snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, int bytes)
+{
+        switch(attrtype) {
+        case IFLA_INET6_STATS:
+                __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes);
+                break;
+        case IFLA_INET6_ICMP6STATS:
+                __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes);
+                break;
+        }
+}
+
 int snmp6_register_dev(struct inet6_dev *idev)
 {
         struct proc_dir_entry *p;
@@ -283,6 +308,13 @@ int snmp6_unregister_dev(struct inet6_dev *idev)
 {
         return 0;
 }
+
+void
+snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, int bytes)
+{
+        memset(stats, 0, sizeof(bytes));
+}
+
 #endif  /* CONFIG_PROC_FS */
 
 int snmp6_alloc_dev(struct inet6_dev *idev)