inet: constify ip headers and in6_addr

Add const qualifiers to structs iphdr, ipv6hdr and in6_addr pointers
where possible, to make code intention more obvious.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 26 insertions, 26 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index af26cc10..852fc28 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -89,12 +89,12 @@ static void		ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu);
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
 static struct rt6_info *rt6_add_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex,
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex,
 					   unsigned pref);
 static struct rt6_info *rt6_get_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex);
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex);
 #endif
 
 static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
@@ -283,7 +283,7 @@ static __inline__ int rt6_check_expired(const struct rt6_info *rt)
 		time_after(jiffies, rt->rt6i_expires);
 }
 
-static inline int rt6_need_strict(struct in6_addr *daddr)
+static inline int rt6_need_strict(const struct in6_addr *daddr)
 {
 	return ipv6_addr_type(daddr) &
 		(IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK);
@@ -295,7 +295,7 @@ static inline int rt6_need_strict(struct in6_addr *daddr)
 
 static inline struct rt6_info *rt6_device_match(struct net *net,
 						    struct rt6_info *rt,
-						    struct in6_addr *saddr,
+						    const struct in6_addr *saddr,
 						    int oif,
 						    int flags)
 {
@@ -507,7 +507,7 @@ static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict)
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
 int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
-		  struct in6_addr *gwaddr)
+		  const struct in6_addr *gwaddr)
 {
 	struct net *net = dev_net(dev);
 	struct route_info *rinfo = (struct route_info *) opt;
@@ -670,8 +670,8 @@ int ip6_ins_rt(struct rt6_info *rt)
 	return __ip6_ins_rt(rt, &info);
 }
 
-static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr,
-				      struct in6_addr *saddr)
+static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, const struct in6_addr *daddr,
+				      const struct in6_addr *saddr)
 {
 	struct rt6_info *rt;
 
@@ -739,7 +739,7 @@ static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *dad
 	return rt;
 }
 
-static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr)
+static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, const struct in6_addr *daddr)
 {
 	struct rt6_info *rt = ip6_rt_copy(ort);
 	if (rt) {
@@ -830,7 +830,7 @@ static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *
 
 void ip6_route_input(struct sk_buff *skb)
 {
-	struct ipv6hdr *iph = ipv6_hdr(skb);
+	const struct ipv6hdr *iph = ipv6_hdr(skb);
 	struct net *net = dev_net(skb->dev);
 	int flags = RT6_LOOKUP_F_HAS_SADDR;
 	struct flowi6 fl6 = {
@@ -1272,7 +1272,7 @@ int ip6_route_add(struct fib6_config *cfg)
 	}
 
 	if (cfg->fc_flags & RTF_GATEWAY) {
-		struct in6_addr *gw_addr;
+		const struct in6_addr *gw_addr;
 		int gwa_type;
 
 		gw_addr = &cfg->fc_gateway;
@@ -1512,9 +1512,9 @@ out:
 	return rt;
 };
 
-static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
-					   struct in6_addr *src,
-					   struct in6_addr *gateway,
+static struct rt6_info *ip6_route_redirect(const struct in6_addr *dest,
+					   const struct in6_addr *src,
+					   const struct in6_addr *gateway,
 					   struct net_device *dev)
 {
 	int flags = RT6_LOOKUP_F_HAS_SADDR;
@@ -1536,8 +1536,8 @@ static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
 						   flags, __ip6_route_redirect);
 }
 
-void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
-		  struct in6_addr *saddr,
+void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
+		  const struct in6_addr *saddr,
 		  struct neighbour *neigh, u8 *lladdr, int on_link)
 {
 	struct rt6_info *rt, *nrt = NULL;
@@ -1611,7 +1611,7 @@ out:
  *	i.e. Path MTU discovery
  */
 
-static void rt6_do_pmtu_disc(struct in6_addr *daddr, struct in6_addr *saddr,
+static void rt6_do_pmtu_disc(const struct in6_addr *daddr, const struct in6_addr *saddr,
 			     struct net *net, u32 pmtu, int ifindex)
 {
 	struct rt6_info *rt, *nrt;
@@ -1696,7 +1696,7 @@ out:
 	dst_release(&rt->dst);
 }
 
-void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
+void rt6_pmtu_discovery(const struct in6_addr *daddr, const struct in6_addr *saddr,
 			struct net_device *dev, u32 pmtu)
 {
 	struct net *net = dev_net(dev);
@@ -1756,8 +1756,8 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
 static struct rt6_info *rt6_get_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex)
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex)
 {
 	struct fib6_node *fn;
 	struct rt6_info *rt = NULL;
@@ -1788,8 +1788,8 @@ out:
 }
 
 static struct rt6_info *rt6_add_route_info(struct net *net,
-					   struct in6_addr *prefix, int prefixlen,
-					   struct in6_addr *gwaddr, int ifindex,
+					   const struct in6_addr *prefix, int prefixlen,
+					   const struct in6_addr *gwaddr, int ifindex,
 					   unsigned pref)
 {
 	struct fib6_config cfg = {
@@ -1817,7 +1817,7 @@ static struct rt6_info *rt6_add_route_info(struct net *net,
 }
 #endif
 
-struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev)
+struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev)
 {
 	struct rt6_info *rt;
 	struct fib6_table *table;
@@ -1839,7 +1839,7 @@ struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *d
 	return rt;
 }
 
-struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
+struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
 				     struct net_device *dev,
 				     unsigned int pref)
 {
@@ -2049,7 +2049,7 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
 
 int ip6_route_get_saddr(struct net *net,
 			struct rt6_info *rt,
-			struct in6_addr *daddr,
+			const struct in6_addr *daddr,
 			unsigned int prefs,
 			struct in6_addr *saddr)
 {