[IPV4]: Use network-order dport for all visible inet_lookup_*

Right now most inet_lookup_* functions take a host-order hnum instead
of a network-order dport because that's how it is represented
internally.

This means that users of these functions have to be careful about
using the right byte-order.  To add more confusion, inet_lookup takes
a network-order dport unlike all other functions.

So this patch changes all visible inet_lookup functions to take a
dport and move all dport->hnum conversion inside them.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index bd513f3..b4491c9 100644 (file)
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -271,10 +271,16 @@ static inline int inet_iif(const struct sk_buff *skb)
        return ((struct rtable *)skb->dst)->rt_iif;
 }
 
-extern struct sock *
-               inet_lookup_listener(struct inet_hashinfo *hashinfo,
-                                    const u32 daddr,
-                                    const unsigned short hnum, const int dif);
+extern struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
+                                          const u32 daddr,
+                                          const unsigned short hnum,
+                                          const int dif);
+
+static inline struct sock *inet_lookup_listener(struct inet_hashinfo *hashinfo,
+                                               u32 daddr, u16 dport, int dif)
+{
+       return __inet_lookup_listener(hashinfo, daddr, ntohs(dport), dif);
+}
 
 /* Socket demux engine toys. */
 #ifdef __BIG_ENDIAN
@@ -362,14 +368,25 @@ hit:
        goto out;
 }
 
+static inline struct sock *
+       inet_lookup_established(struct inet_hashinfo *hashinfo,
+                               const u32 saddr, const u16 sport,
+                               const u32 daddr, const u16 dport,
+                               const int dif)
+{
+       return __inet_lookup_established(hashinfo, saddr, sport, daddr,
+                                        ntohs(dport), dif);
+}
+
 static inline struct sock *__inet_lookup(struct inet_hashinfo *hashinfo,
                                         const u32 saddr, const u16 sport,
-                                        const u32 daddr, const u16 hnum,
+                                        const u32 daddr, const u16 dport,
                                         const int dif)
 {
+       u16 hnum = ntohs(dport);
        struct sock *sk = __inet_lookup_established(hashinfo, saddr, sport, daddr,
                                                    hnum, dif);
-       return sk ? : inet_lookup_listener(hashinfo, daddr, hnum, dif);
+       return sk ? : __inet_lookup_listener(hashinfo, daddr, hnum, dif);
 }
 
 static inline struct sock *inet_lookup(struct inet_hashinfo *hashinfo,
@@ -380,7 +397,7 @@ static inline struct sock *inet_lookup(struct inet_hashinfo *hashinfo,
        struct sock *sk;
 
        local_bh_disable();
-       sk = __inet_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
+       sk = __inet_lookup(hashinfo, saddr, sport, daddr, dport, dif);
        local_bh_enable();
 
        return sk;

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 171d363..9a1a76a 100644 (file)
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -608,10 +608,10 @@ static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
        if (req != NULL)
                return dccp_check_req(sk, skb, req, prev);
 
-       nsk = __inet_lookup_established(&dccp_hashinfo,
-                                       iph->saddr, dh->dccph_sport,
-                                       iph->daddr, ntohs(dh->dccph_dport),
-                                       inet_iif(skb));
+       nsk = inet_lookup_established(&dccp_hashinfo,
+                                     iph->saddr, dh->dccph_sport,
+                                     iph->daddr, dh->dccph_dport,
+                                     inet_iif(skb));
        if (nsk != NULL) {
                if (nsk->sk_state != DCCP_TIME_WAIT) {
                        bh_lock_sock(nsk);
@@ -925,7 +925,7 @@ static int dccp_v4_rcv(struct sk_buff *skb)
         *      Look up flow ID in table and get corresponding socket */
        sk = __inet_lookup(&dccp_hashinfo,
                           skb->nh.iph->saddr, dh->dccph_sport,
-                          skb->nh.iph->daddr, ntohs(dh->dccph_dport),
+                          skb->nh.iph->daddr, dh->dccph_dport,
                           inet_iif(skb));
 
        /* 

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index bfc3906..fb296c9 100644 (file)
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -124,10 +124,10 @@ EXPORT_SYMBOL(inet_listen_wlock);
  * remote address for the connection. So always assume those are both
  * wildcarded during the search since they can never be otherwise.
  */
-static struct sock *__inet_lookup_listener(const struct hlist_head *head,
-                                          const u32 daddr,
-                                          const unsigned short hnum,
-                                          const int dif)
+static struct sock *inet_lookup_listener_slow(const struct hlist_head *head,
+                                             const u32 daddr,
+                                             const unsigned short hnum,
+                                             const int dif)
 {
        struct sock *result = NULL, *sk;
        const struct hlist_node *node;
@@ -162,9 +162,9 @@ static struct sock *__inet_lookup_listener(const struct hlist_head *head,
 }
 
 /* Optimize the common listener case. */
-struct sock *inet_lookup_listener(struct inet_hashinfo *hashinfo,
-                                 const u32 daddr, const unsigned short hnum,
-                                 const int dif)
+struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
+                                   const u32 daddr, const unsigned short hnum,
+                                   const int dif)
 {
        struct sock *sk = NULL;
        const struct hlist_head *head;
@@ -179,7 +179,7 @@ struct sock *inet_lookup_listener(struct inet_hashinfo *hashinfo,
                    (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
                    !sk->sk_bound_dev_if)
                        goto sherry_cache;
-               sk = __inet_lookup_listener(head, daddr, hnum, dif);
+               sk = inet_lookup_listener_slow(head, daddr, hnum, dif);
        }
        if (sk) {
 sherry_cache:
@@ -188,7 +188,7 @@ sherry_cache:
        read_unlock(&hashinfo->lhash_lock);
        return sk;
 }
-EXPORT_SYMBOL_GPL(inet_lookup_listener);
+EXPORT_SYMBOL_GPL(__inet_lookup_listener);
 
 /* called with local bh disabled */
 static int __inet_check_established(struct inet_timewait_death_row *death_row,

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index b2aa512..2973dee 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -951,9 +951,9 @@ static struct sock *tcp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
        if (req)
                return tcp_check_req(sk, skb, req, prev);
 
-       nsk = __inet_lookup_established(&tcp_hashinfo, skb->nh.iph->saddr,
-                                       th->source, skb->nh.iph->daddr,
-                                       ntohs(th->dest), inet_iif(skb));
+       nsk = inet_lookup_established(&tcp_hashinfo, skb->nh.iph->saddr,
+                                     th->source, skb->nh.iph->daddr,
+                                     th->dest, inet_iif(skb));
 
        if (nsk) {
                if (nsk->sk_state != TCP_TIME_WAIT) {
@@ -1090,7 +1090,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
        TCP_SKB_CB(skb)->sacked  = 0;
 
        sk = __inet_lookup(&tcp_hashinfo, skb->nh.iph->saddr, th->source,
-                          skb->nh.iph->daddr, ntohs(th->dest),
+                          skb->nh.iph->daddr, th->dest,
                           inet_iif(skb));
 
        if (!sk)
@@ -1168,7 +1168,7 @@ do_time_wait:
        case TCP_TW_SYN: {
                struct sock *sk2 = inet_lookup_listener(&tcp_hashinfo,
                                                        skb->nh.iph->daddr,
-                                                       ntohs(th->dest),
+                                                       th->dest,
                                                        inet_iif(skb));
                if (sk2) {
                        inet_twsk_deschedule((struct inet_timewait_sock *)sk,