[INET]: Remove no longer needed ->equal callback

Since this callback is used to check for conflicts in
hashtable when inserting a newly created frag queue, we can
do the same by checking for matching the queue with the 
argument, used to create one.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/inet_frag.h

@@ -43,8 +43,6 @@ struct inet_frags {
 						void *arg);
 	void			(*destructor)(struct inet_frag_queue *);
 	void			(*skb_free)(struct sk_buff *);
-	int			(*equal)(struct inet_frag_queue *q1,
-					 struct inet_frag_queue *q2);
 	int			(*match)(struct inet_frag_queue *q,
 						void *arg);
 	void			(*frag_expire)(unsigned long data);

include/net/ipv6.h

@@ -378,7 +378,6 @@ static inline int ipv6_prefix_equal(const struct in6_addr *a1,
 }
 
 struct inet_frag_queue;
-int ip6_frag_equal(struct inet_frag_queue *q1, struct inet_frag_queue *q2);
 
 struct ip6_create_arg {
 	__be32 id;

net/ipv4/inet_fragment.c

@@ -174,7 +174,7 @@ int inet_frag_evictor(struct inet_frags *f)
 EXPORT_SYMBOL(inet_frag_evictor);
 
 static struct inet_frag_queue *inet_frag_intern(struct inet_frag_queue *qp_in,
-		struct inet_frags *f, unsigned int hash)
+		struct inet_frags *f, unsigned int hash, void *arg)
 {
 	struct inet_frag_queue *qp;
 #ifdef CONFIG_SMP
@@ -188,7 +188,7 @@ static struct inet_frag_queue *inet_frag_intern(struct inet_frag_queue *qp_in,
 	 * promoted read lock to write lock.
 	 */
 	hlist_for_each_entry(qp, n, &f->hash[hash], list) {
-		if (f->equal(qp, qp_in)) {
+		if (f->match(qp, arg)) {
 			atomic_inc(&qp->refcnt);
 			write_unlock(&f->lock);
 			qp_in->last_in |= COMPLETE;
@@ -235,7 +235,7 @@ static struct inet_frag_queue *inet_frag_create(struct inet_frags *f,
 	if (q == NULL)
 		return NULL;
 
-	return inet_frag_intern(q, f, hash);
+	return inet_frag_intern(q, f, hash, arg);
 }
 
 struct inet_frag_queue *inet_frag_find(struct inet_frags *f, void *key,

net/ipv4/ip_fragment.c

@@ -128,20 +128,6 @@ static unsigned int ip4_hashfn(struct inet_frag_queue *q)
 	return ipqhashfn(ipq->id, ipq->saddr, ipq->daddr, ipq->protocol);
 }
 
-static int ip4_frag_equal(struct inet_frag_queue *q1,
-		struct inet_frag_queue *q2)
-{
-	struct ipq *qp1, *qp2;
-
-	qp1 = container_of(q1, struct ipq, q);
-	qp2 = container_of(q2, struct ipq, q);
-	return (qp1->id == qp2->id &&
-			qp1->saddr == qp2->saddr &&
-			qp1->daddr == qp2->daddr &&
-			qp1->protocol == qp2->protocol &&
-			qp1->user == qp2->user);
-}
-
 static int ip4_frag_match(struct inet_frag_queue *q, void *a)
 {
 	struct ipq *qp;
@@ -631,7 +617,6 @@ void __init ipfrag_init(void)
 	ip4_frags.destructor = ip4_frag_free;
 	ip4_frags.skb_free = NULL;
 	ip4_frags.qsize = sizeof(struct ipq);
-	ip4_frags.equal = ip4_frag_equal;
 	ip4_frags.match = ip4_frag_match;
 	ip4_frags.frag_expire = ip_expire;
 	inet_frags_init(&ip4_frags);

net/ipv6/netfilter/nf_conntrack_reasm.c

@@ -686,7 +686,6 @@ int nf_ct_frag6_init(void)
 	nf_frags.skb_free = nf_skb_free;
 	nf_frags.qsize = sizeof(struct nf_ct_frag6_queue);
 	nf_frags.match = ip6_frag_match;
-	nf_frags.equal = ip6_frag_equal;
 	nf_frags.frag_expire = nf_ct_frag6_expire;
 	inet_frags_init(&nf_frags);
 

net/ipv6/reassembly.c

@@ -143,18 +143,6 @@ static unsigned int ip6_hashfn(struct inet_frag_queue *q)
 	return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr);
 }
 
-int ip6_frag_equal(struct inet_frag_queue *q1, struct inet_frag_queue *q2)
-{
-	struct frag_queue *fq1, *fq2;
-
-	fq1 = container_of(q1, struct frag_queue, q);
-	fq2 = container_of(q2, struct frag_queue, q);
-	return (fq1->id == fq2->id &&
-			ipv6_addr_equal(&fq2->saddr, &fq1->saddr) &&
-			ipv6_addr_equal(&fq2->daddr, &fq1->daddr));
-}
-EXPORT_SYMBOL(ip6_frag_equal);
-
 int ip6_frag_match(struct inet_frag_queue *q, void *a)
 {
 	struct frag_queue *fq;
@@ -661,7 +649,6 @@ void __init ipv6_frag_init(void)
 	ip6_frags.skb_free = NULL;
 	ip6_frags.qsize = sizeof(struct frag_queue);
 	ip6_frags.match = ip6_frag_match;
-	ip6_frags.equal = ip6_frag_equal;
 	ip6_frags.frag_expire = ip6_frag_expire;
 	inet_frags_init(&ip6_frags);
 }