[IPV4]: annotate rt_hash_code() users

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index e14df8e..32fcb77 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -261,6 +261,10 @@ static unsigned int rt_hash_code(u32 daddr, u32 saddr)
                & rt_hash_mask);
 }
 
+#define rt_hash(daddr, saddr, idx) \
+       rt_hash_code((__force u32)(__be32)(daddr),\
+                    (__force u32)(__be32)(saddr) ^ ((idx) << 5))
+
 #ifdef CONFIG_PROC_FS
 struct rt_cache_iter_state {
        int bucket;
@@ -1147,8 +1151,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
 
        for (i = 0; i < 2; i++) {
                for (k = 0; k < 2; k++) {
-                       unsigned hash = rt_hash_code(daddr,
-                                                    skeys[i] ^ (ikeys[k] << 5));
+                       unsigned hash = rt_hash(daddr, skeys[i], ikeys[k]);
 
                        rthp=&rt_hash_table[hash].chain;
 
@@ -1260,9 +1263,8 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
                        ret = NULL;
                } else if ((rt->rt_flags & RTCF_REDIRECTED) ||
                           rt->u.dst.expires) {
-                       unsigned hash = rt_hash_code(rt->fl.fl4_dst,
-                                                    rt->fl.fl4_src ^
-                                                       (rt->fl.oif << 5));
+                       unsigned hash = rt_hash(rt->fl.fl4_dst, rt->fl.fl4_src,
+                                               rt->fl.oif);
 #if RT_CACHE_DEBUG >= 1
                        printk(KERN_DEBUG "ip_rt_advice: redirect to "
                                          "%u.%u.%u.%u/%02x dropped\n",
@@ -1405,7 +1407,7 @@ unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu)
                return 0;
 
        for (i = 0; i < 2; i++) {
-               unsigned hash = rt_hash_code(daddr, skeys[i]);
+               unsigned hash = rt_hash(daddr, skeys[i], 0);
 
                rcu_read_lock();
                for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
@@ -1665,7 +1667,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
        RT_CACHE_STAT_INC(in_slow_mc);
 
        in_dev_put(in_dev);
-       hash = rt_hash_code(daddr, saddr ^ (dev->ifindex << 5));
+       hash = rt_hash(daddr, saddr, dev->ifindex);
        return rt_intern_hash(hash, rth, (struct rtable**) &skb->dst);
 
 e_nobufs:
@@ -1830,7 +1832,7 @@ static inline int ip_mkroute_input_def(struct sk_buff *skb,
                return err;
 
        /* put it into the cache */
-       hash = rt_hash_code(daddr, saddr ^ (fl->iif << 5));
+       hash = rt_hash(daddr, saddr, fl->iif);
        return rt_intern_hash(hash, rth, (struct rtable**)&skb->dst);   
 }
 
@@ -1871,7 +1873,7 @@ static inline int ip_mkroute_input(struct sk_buff *skb,
                        return err;
 
                /* put it into the cache */
-               hash = rt_hash_code(daddr, saddr ^ (fl->iif << 5));
+               hash = rt_hash(daddr, saddr, fl->iif);
                err = rt_intern_hash(hash, rth, &rtres);
                if (err)
                        return err;
@@ -2048,7 +2050,7 @@ local_input:
                rth->rt_flags   &= ~RTCF_LOCAL;
        }
        rth->rt_type    = res.type;
-       hash = rt_hash_code(daddr, saddr ^ (fl.iif << 5));
+       hash = rt_hash(daddr, saddr, fl.iif);
        err = rt_intern_hash(hash, rth, (struct rtable**)&skb->dst);
        goto done;
 
@@ -2095,7 +2097,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
        int iif = dev->ifindex;
 
        tos &= IPTOS_RT_MASK;
-       hash = rt_hash_code(daddr, saddr ^ (iif << 5));
+       hash = rt_hash(daddr, saddr, iif);
 
        rcu_read_lock();
        for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
@@ -2293,8 +2295,7 @@ static inline int ip_mkroute_output_def(struct rtable **rp,
        int err = __mkroute_output(&rth, res, fl, oldflp, dev_out, flags);
        unsigned hash;
        if (err == 0) {
-               hash = rt_hash_code(oldflp->fl4_dst, 
-                                   oldflp->fl4_src ^ (oldflp->oif << 5));
+               hash = rt_hash(oldflp->fl4_dst, oldflp->fl4_src, oldflp->oif);
                err = rt_intern_hash(hash, rth, rp);
        }
        
@@ -2336,9 +2337,8 @@ static inline int ip_mkroute_output(struct rtable** rp,
                        if (err != 0)
                                goto cleanup;
 
-                       hash = rt_hash_code(oldflp->fl4_dst, 
-                                           oldflp->fl4_src ^
-                                           (oldflp->oif << 5));
+                       hash = rt_hash(oldflp->fl4_dst, oldflp->fl4_src,
+                                       oldflp->oif);
                        err = rt_intern_hash(hash, rth, rp);
 
                        /* forward hop information to multipath impl. */
@@ -2567,7 +2567,7 @@ int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
        unsigned hash;
        struct rtable *rth;
 
-       hash = rt_hash_code(flp->fl4_dst, flp->fl4_src ^ (flp->oif << 5));
+       hash = rt_hash(flp->fl4_dst, flp->fl4_src, flp->oif);
 
        rcu_read_lock_bh();
        for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;