[RTNETLINK]: Add rtnl_put_cacheinfo() to unify some code

IPv4, IPv6, and DECNet all use struct rta_cacheinfo in a similiar
way, therefore rtnl_put_cacheinfo() is added to reuse code.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 15 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index ee00b6506ab4..9f3924c4905e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2629,7 +2629,8 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
         struct rtable *rt = (struct rtable*)skb->dst;
         struct rtmsg *r;
         struct nlmsghdr *nlh;
-        struct rta_cacheinfo ci;
+        long expires;
+        u32 id = 0, ts = 0, tsage = 0, error;
 
         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
         if (nlh == NULL)
@@ -2676,20 +2677,13 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
         if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0)
                 goto nla_put_failure;
 
-        ci.rta_lastuse  = jiffies_to_clock_t(jiffies - rt->u.dst.lastuse);
-        ci.rta_used     = rt->u.dst.__use;
-        ci.rta_clntref  = atomic_read(&rt->u.dst.__refcnt);
-        if (rt->u.dst.expires)
-                ci.rta_expires = jiffies_to_clock_t(rt->u.dst.expires - jiffies);
-        else
-                ci.rta_expires = 0;
-        ci.rta_error    = rt->u.dst.error;
-        ci.rta_id       = ci.rta_ts = ci.rta_tsage = 0;
+        error = rt->u.dst.error;
+        expires = rt->u.dst.expires ? rt->u.dst.expires - jiffies : 0;
         if (rt->peer) {
-                ci.rta_id = rt->peer->ip_id_count;
+                id = rt->peer->ip_id_count;
                 if (rt->peer->tcp_ts_stamp) {
-                        ci.rta_ts = rt->peer->tcp_ts;
-                        ci.rta_tsage = xtime.tv_sec - rt->peer->tcp_ts_stamp;
+                        ts = rt->peer->tcp_ts;
+                        tsage = xtime.tv_sec - rt->peer->tcp_ts_stamp;
                 }
         }
 
@@ -2708,7 +2702,7 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
                                 } else {
                                         if (err == -EMSGSIZE)
                                                 goto nla_put_failure;
-                                        ci.rta_error = err;
+                                        error = err;
                                 }
                         }
                 } else
@@ -2716,7 +2710,9 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
                         NLA_PUT_U32(skb, RTA_IIF, rt->fl.iif);
         }
 
-        NLA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+        if (rtnl_put_cacheinfo(skb, &rt->u.dst, id, ts, tsage,
+                               expires, error) < 0)
+                goto nla_put_failure;
 
         return nlmsg_end(skb, nlh);