[IPV4]: annotate inet_lookup() and friends

inet_lookup() annotated along with helper functions (__inet_lookup(),
__inet_lookup_established(), inet_lookup_established(),
inet_lookup_listener(), __inet_lookup_listener() and inet_ehashfn())
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/inet_hashtables.h

@@ -272,12 +272,12 @@ static inline int inet_iif(const struct sk_buff *skb)
 }
 
 extern struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
-					   const u32 daddr,
+					   const __be32 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)
+						__be32 daddr, __be16 dport, int dif)
 {
 	return __inet_lookup_listener(hashinfo, daddr, ntohs(dport), dif);
 }
@@ -347,8 +347,8 @@ typedef __u64 __bitwise __addrpair;
  */
 static inline struct sock *
 	__inet_lookup_established(struct inet_hashinfo *hashinfo,
-				  const u32 saddr, const u16 sport,
-				  const u32 daddr, const u16 hnum,
+				  const __be32 saddr, const __be16 sport,
+				  const __be32 daddr, const u16 hnum,
 				  const int dif)
 {
 	INET_ADDR_COOKIE(acookie, saddr, daddr)
@@ -384,8 +384,8 @@ static inline struct sock *
 
 static inline struct sock *
 	inet_lookup_established(struct inet_hashinfo *hashinfo,
-				const u32 saddr, const u16 sport,
-				const u32 daddr, const u16 dport,
+				const __be32 saddr, const __be16 sport,
+				const __be32 daddr, const __be16 dport,
 				const int dif)
 {
 	return __inet_lookup_established(hashinfo, saddr, sport, daddr,
@@ -393,8 +393,8 @@ static inline struct sock *
 }
 
 static inline struct sock *__inet_lookup(struct inet_hashinfo *hashinfo,
-					 const u32 saddr, const u16 sport,
-					 const u32 daddr, const u16 dport,
+					 const __be32 saddr, const __be16 sport,
+					 const __be32 daddr, const __be16 dport,
 					 const int dif)
 {
 	u16 hnum = ntohs(dport);
@@ -404,8 +404,8 @@ static inline struct sock *__inet_lookup(struct inet_hashinfo *hashinfo,
 }
 
 static inline struct sock *inet_lookup(struct inet_hashinfo *hashinfo,
-				       const u32 saddr, const u16 sport,
-				       const u32 daddr, const u16 dport,
+				       const __be32 saddr, const __be16 sport,
+				       const __be32 daddr, const __be16 dport,
 				       const int dif)
 {
 	struct sock *sk;

include/net/inet_sock.h

@@ -167,10 +167,10 @@ static inline void inet_sk_copy_descendant(struct sock *sk_to,
 
 extern int inet_sk_rebuild_header(struct sock *sk);
 
-static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,
-					const __u32 faddr, const __u16 fport)
+static inline unsigned int inet_ehashfn(const __be32 laddr, const __u16 lport,
+					const __be32 faddr, const __be16 fport)
 {
-	unsigned int h = (laddr ^ lport) ^ (faddr ^ fport);
+	unsigned int h = ((__force __u32)laddr ^ lport) ^ ((__force __u32)faddr ^ (__force __u32)fport);
 	h ^= h >> 16;
 	h ^= h >> 8;
 	return h;
@@ -179,10 +179,10 @@ static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,
 static inline int inet_sk_ehashfn(const struct sock *sk)
 {
 	const struct inet_sock *inet = inet_sk(sk);
-	const __u32 laddr = inet->rcv_saddr;
+	const __be32 laddr = inet->rcv_saddr;
 	const __u16 lport = inet->num;
-	const __u32 faddr = inet->daddr;
-	const __u16 fport = inet->dport;
+	const __be32 faddr = inet->daddr;
+	const __be16 fport = inet->dport;
 
 	return inet_ehashfn(laddr, lport, faddr, fport);
 }

net/ipv4/inet_hashtables.c

@@ -125,7 +125,7 @@ EXPORT_SYMBOL(inet_listen_wlock);
  * wildcarded during the search since they can never be otherwise.
  */
 static struct sock *inet_lookup_listener_slow(const struct hlist_head *head,
-					      const u32 daddr,
+					      const __be32 daddr,
 					      const unsigned short hnum,
 					      const int dif)
 {
@@ -137,7 +137,7 @@ static struct sock *inet_lookup_listener_slow(const struct hlist_head *head,
 		const struct inet_sock *inet = inet_sk(sk);
 
 		if (inet->num == hnum && !ipv6_only_sock(sk)) {
-			const __u32 rcv_saddr = inet->rcv_saddr;
+			const __be32 rcv_saddr = inet->rcv_saddr;
 			int score = sk->sk_family == PF_INET ? 1 : 0;
 
 			if (rcv_saddr) {
@@ -163,7 +163,7 @@ static struct sock *inet_lookup_listener_slow(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 __be32 daddr, const unsigned short hnum,
 				    const int dif)
 {
 	struct sock *sk = NULL;
@@ -197,8 +197,8 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
 {
 	struct inet_hashinfo *hinfo = death_row->hashinfo;
 	struct inet_sock *inet = inet_sk(sk);
-	u32 daddr = inet->rcv_saddr;
-	u32 saddr = inet->daddr;
+	__be32 daddr = inet->rcv_saddr;
+	__be32 saddr = inet->daddr;
 	int dif = sk->sk_bound_dev_if;
 	INET_ADDR_COOKIE(acookie, saddr, daddr)
 	const __portpair ports = INET_COMBINED_PORTS(inet->dport, lport);