[IPv4]: Convert FIB dumping to use new netlink api

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

1 files changed, 33 insertions, 35 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index b8f6cadc5b3..31b67059ac2 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2639,52 +2639,54 @@ 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;
-	unsigned char	 *b = skb->tail;
+	struct nlmsghdr *nlh;
 	struct rta_cacheinfo ci;
-#ifdef CONFIG_IP_MROUTE
-	struct rtattr *eptr;
-#endif
-	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
-	r = NLMSG_DATA(nlh);
+
+	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
+	if (nlh == NULL)
+		return -ENOBUFS;
+
+	r = nlmsg_data(nlh);
 	r->rtm_family	 = AF_INET;
 	r->rtm_dst_len	= 32;
 	r->rtm_src_len	= 0;
 	r->rtm_tos	= rt->fl.fl4_tos;
 	r->rtm_table	= RT_TABLE_MAIN;
-	RTA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
+	NLA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
 	r->rtm_type	= rt->rt_type;
 	r->rtm_scope	= RT_SCOPE_UNIVERSE;
 	r->rtm_protocol = RTPROT_UNSPEC;
 	r->rtm_flags	= (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED;
 	if (rt->rt_flags & RTCF_NOTIFY)
 		r->rtm_flags |= RTM_F_NOTIFY;
-	RTA_PUT(skb, RTA_DST, 4, &rt->rt_dst);
+
+	NLA_PUT_U32(skb, RTA_DST, rt->rt_dst);
+
 	if (rt->fl.fl4_src) {
 		r->rtm_src_len = 32;
-		RTA_PUT(skb, RTA_SRC, 4, &rt->fl.fl4_src);
+		NLA_PUT_U32(skb, RTA_SRC, rt->fl.fl4_src);
 	}
 	if (rt->u.dst.dev)
-		RTA_PUT(skb, RTA_OIF, sizeof(int), &rt->u.dst.dev->ifindex);
+		NLA_PUT_U32(skb, RTA_OIF, rt->u.dst.dev->ifindex);
 #ifdef CONFIG_NET_CLS_ROUTE
 	if (rt->u.dst.tclassid)
-		RTA_PUT(skb, RTA_FLOW, 4, &rt->u.dst.tclassid);
+		NLA_PUT_U32(skb, RTA_FLOW, rt->u.dst.tclassid);
 #endif
 #ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
-	if (rt->rt_multipath_alg != IP_MP_ALG_NONE) {
-		__u32 alg = rt->rt_multipath_alg;
-
-		RTA_PUT(skb, RTA_MP_ALGO, 4, &alg);
-	}
+	if (rt->rt_multipath_alg != IP_MP_ALG_NONE)
+		NLA_PUT_U32(skb, RTA_MP_ALGO, rt->rt_multipath_alg);
 #endif
 	if (rt->fl.iif)
-		RTA_PUT(skb, RTA_PREFSRC, 4, &rt->rt_spec_dst);
+		NLA_PUT_U32(skb, RTA_PREFSRC, rt->rt_spec_dst);
 	else if (rt->rt_src != rt->fl.fl4_src)
-		RTA_PUT(skb, RTA_PREFSRC, 4, &rt->rt_src);
+		NLA_PUT_U32(skb, RTA_PREFSRC, rt->rt_src);
+
 	if (rt->rt_dst != rt->rt_gateway)
-		RTA_PUT(skb, RTA_GATEWAY, 4, &rt->rt_gateway);
+		NLA_PUT_U32(skb, RTA_GATEWAY, rt->rt_gateway);
+
 	if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0)
-		goto rtattr_failure;
+		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);
@@ -2701,10 +2703,7 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
 			ci.rta_tsage = xtime.tv_sec - rt->peer->tcp_ts_stamp;
 		}
 	}
-#ifdef CONFIG_IP_MROUTE
-	eptr = (struct rtattr*)skb->tail;
-#endif
-	RTA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+
 	if (rt->fl.iif) {
 #ifdef CONFIG_IP_MROUTE
 		u32 dst = rt->rt_dst;
@@ -2716,25 +2715,24 @@ static int rt_fill_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
 				if (!nowait) {
 					if (err == 0)
 						return 0;
-					goto nlmsg_failure;
+					goto nla_put_failure;
 				} else {
 					if (err == -EMSGSIZE)
-						goto nlmsg_failure;
-					((struct rta_cacheinfo*)RTA_DATA(eptr))->rta_error = err;
+						goto nla_put_failure;
+					ci.rta_error = err;
 				}
 			}
 		} else
 #endif
-			RTA_PUT(skb, RTA_IIF, sizeof(int), &rt->fl.iif);
+			NLA_PUT_U32(skb, RTA_IIF, rt->fl.iif);
 	}
 
-	nlh->nlmsg_len = skb->tail - b;
-	return skb->len;
+	NLA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+
+	return nlmsg_end(skb, nlh);
 
-nlmsg_failure:
-rtattr_failure:
-	skb_trim(skb, b - skb->data);
-	return -1;
+nla_put_failure:
+	return nlmsg_cancel(skb, nlh);
 }
 
 int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)