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 af26cc1073cb..852fc28ca818 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)
 {