net: dst: remove unnecessary input parameter in dst_alloc and dst_init

Since commit 1202cdd6("Remove DECnet support from kernel") has been
merged, all callers pass in the initial_ref value of 1 when they call
dst_alloc(). Therefore, remove initial_ref when the dst_alloc() is
declared and replace initial_ref with 1 in dst_alloc().
Also when all callers call dst_init(), the value of initial_ref is 1.
Therefore, remove the input parameter initial_ref of the dst_init() and
replace initial_ref with the value 1 in dst_init.
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20230911125045.346390-1-shaozhengchao@huawei.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

include/net/dst.h

@@ -392,10 +392,10 @@ static inline int dst_discard(struct sk_buff *skb)
 {
 	return dst_discard_out(&init_net, skb->sk, skb);
 }
-void *dst_alloc(struct dst_ops *ops, struct net_device *dev, int initial_ref,
+void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
 		int initial_obsolete, unsigned short flags);
 void dst_init(struct dst_entry *dst, struct dst_ops *ops,
-	      struct net_device *dev, int initial_ref, int initial_obsolete,
+	      struct net_device *dev, int initial_obsolete,
 	      unsigned short flags);
 struct dst_entry *dst_destroy(struct dst_entry *dst);
 void dst_dev_put(struct dst_entry *dst);

net/core/dst.c

@@ -45,7 +45,7 @@ const struct dst_metrics dst_default_metrics = {
 EXPORT_SYMBOL(dst_default_metrics);
 
 void dst_init(struct dst_entry *dst, struct dst_ops *ops,
-	      struct net_device *dev, int initial_ref, int initial_obsolete,
+	      struct net_device *dev, int initial_obsolete,
 	      unsigned short flags)
 {
 	dst->dev = dev;
@@ -66,7 +66,7 @@ void dst_init(struct dst_entry *dst, struct dst_ops *ops,
 	dst->tclassid = 0;
 #endif
 	dst->lwtstate = NULL;
-	rcuref_init(&dst->__rcuref, initial_ref);
+	rcuref_init(&dst->__rcuref, 1);
 	INIT_LIST_HEAD(&dst->rt_uncached);
 	dst->__use = 0;
 	dst->lastuse = jiffies;
@@ -77,7 +77,7 @@ void dst_init(struct dst_entry *dst, struct dst_ops *ops,
 EXPORT_SYMBOL(dst_init);
 
 void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
-		int initial_ref, int initial_obsolete, unsigned short flags)
+		int initial_obsolete, unsigned short flags)
 {
 	struct dst_entry *dst;
 
@@ -90,7 +90,7 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
 	if (!dst)
 		return NULL;
 
-	dst_init(dst, ops, dev, initial_ref, initial_obsolete, flags);
+	dst_init(dst, ops, dev, initial_obsolete, flags);
 
 	return dst;
 }
@@ -270,7 +270,7 @@ static void __metadata_dst_init(struct metadata_dst *md_dst,
 	struct dst_entry *dst;
 
 	dst = &md_dst->dst;
-	dst_init(dst, &dst_blackhole_ops, NULL, 1, DST_OBSOLETE_NONE,
+	dst_init(dst, &dst_blackhole_ops, NULL, DST_OBSOLETE_NONE,
 		 DST_METADATA | DST_NOCOUNT);
 	memset(dst + 1, 0, sizeof(*md_dst) + optslen - sizeof(*dst));
 	md_dst->type = type;

net/ipv4/route.c

@@ -1630,7 +1630,7 @@ struct rtable *rt_dst_alloc(struct net_device *dev,
 {
 	struct rtable *rt;
 
-	rt = dst_alloc(&ipv4_dst_ops, dev, 1, DST_OBSOLETE_FORCE_CHK,
+	rt = dst_alloc(&ipv4_dst_ops, dev, DST_OBSOLETE_FORCE_CHK,
 		       (noxfrm ? DST_NOXFRM : 0));
 
 	if (rt) {
@@ -1658,7 +1658,7 @@ struct rtable *rt_dst_clone(struct net_device *dev, struct rtable *rt)
 {
 	struct rtable *new_rt;
 
-	new_rt = dst_alloc(&ipv4_dst_ops, dev, 1, DST_OBSOLETE_FORCE_CHK,
+	new_rt = dst_alloc(&ipv4_dst_ops, dev, DST_OBSOLETE_FORCE_CHK,
 			   rt->dst.flags);
 
 	if (new_rt) {
@@ -2832,7 +2832,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
 	struct rtable *ort = (struct rtable *) dst_orig;
 	struct rtable *rt;
 
-	rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, DST_OBSOLETE_DEAD, 0);
+	rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, DST_OBSOLETE_DEAD, 0);
 	if (rt) {
 		struct dst_entry *new = &rt->dst;
 

net/ipv6/route.c

@@ -341,7 +341,7 @@ struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev,
 			       int flags)
 {
 	struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev,
-					1, DST_OBSOLETE_FORCE_CHK, flags);
+					DST_OBSOLETE_FORCE_CHK, flags);
 
 	if (rt) {
 		rt6_info_init(rt);
@@ -2655,7 +2655,7 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
 	struct net_device *loopback_dev = net->loopback_dev;
 	struct dst_entry *new = NULL;
 
-	rt = dst_alloc(&ip6_dst_blackhole_ops, loopback_dev, 1,
+	rt = dst_alloc(&ip6_dst_blackhole_ops, loopback_dev,
 		       DST_OBSOLETE_DEAD, 0);
 	if (rt) {
 		rt6_info_init(rt);

net/openvswitch/actions.c

@@ -873,7 +873,7 @@ static void ovs_fragment(struct net *net, struct vport *vport,
 
 		prepare_frag(vport, skb, orig_network_offset,
 			     ovs_key_mac_proto(key));
-		dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1,
+		dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL,
 			 DST_OBSOLETE_NONE, DST_NOCOUNT);
 		ovs_rt.dst.dev = vport->dev;
 
@@ -890,7 +890,7 @@ static void ovs_fragment(struct net *net, struct vport *vport,
 		prepare_frag(vport, skb, orig_network_offset,
 			     ovs_key_mac_proto(key));
 		memset(&ovs_rt, 0, sizeof(ovs_rt));
-		dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1,
+		dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL,
 			 DST_OBSOLETE_NONE, DST_NOCOUNT);
 		ovs_rt.dst.dev = vport->dev;
 

net/sched/sch_frag.c

@@ -96,7 +96,7 @@ static int sch_fragment(struct net *net, struct sk_buff *skb,
 		unsigned long orig_dst;
 
 		sch_frag_prepare_frag(skb, xmit);
-		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL, 1,
+		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL,
 			 DST_OBSOLETE_NONE, DST_NOCOUNT);
 		sch_frag_rt.dst.dev = skb->dev;
 
@@ -112,7 +112,7 @@ static int sch_fragment(struct net *net, struct sk_buff *skb,
 
 		sch_frag_prepare_frag(skb, xmit);
 		memset(&sch_frag_rt, 0, sizeof(sch_frag_rt));
-		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL, 1,
+		dst_init(&sch_frag_rt.dst, &sch_frag_dst_ops, NULL,
 			 DST_OBSOLETE_NONE, DST_NOCOUNT);
 		sch_frag_rt.dst.dev = skb->dev;
 

net/xfrm/xfrm_policy.c

@@ -2561,7 +2561,7 @@ static inline struct xfrm_dst *xfrm_alloc_dst(struct net *net, int family)
 	default:
 		BUG();
 	}
-	xdst = dst_alloc(dst_ops, NULL, 1, DST_OBSOLETE_NONE, 0);
+	xdst = dst_alloc(dst_ops, NULL, DST_OBSOLETE_NONE, 0);
 
 	if (likely(xdst)) {
 		memset_after(xdst, 0, u.dst);