[INET]: Consolidate the xxx_frag_kill

Since now all the xxx_frag_kill functions now work
with the generic inet_frag_queue data type, this can
be moved into a common place.

The xxx_unlink() code is moved as well.

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

include/net/inet_frag.h

@@ -41,4 +41,6 @@ struct inet_frags {
 void inet_frags_init(struct inet_frags *);
 void inet_frags_fini(struct inet_frags *);
 
+void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
+
 #endif

net/ipv4/inet_fragment.c

@@ -42,3 +42,26 @@ void inet_frags_fini(struct inet_frags *f)
 {
 }
 EXPORT_SYMBOL(inet_frags_fini);
+
+static inline void fq_unlink(struct inet_frag_queue *fq, struct inet_frags *f)
+{
+	write_lock(&f->lock);
+	hlist_del(&fq->list);
+	list_del(&fq->lru_list);
+	f->nqueues--;
+	write_unlock(&f->lock);
+}
+
+void inet_frag_kill(struct inet_frag_queue *fq, struct inet_frags *f)
+{
+	if (del_timer(&fq->timer))
+		atomic_dec(&fq->refcnt);
+
+	if (!(fq->last_in & COMPLETE)) {
+		fq_unlink(fq, f);
+		atomic_dec(&fq->refcnt);
+		fq->last_in |= COMPLETE;
+	}
+}
+
+EXPORT_SYMBOL(inet_frag_kill);

net/ipv4/ip_fragment.c

@@ -108,20 +108,6 @@ int ip_frag_mem(void)
 static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
 			 struct net_device *dev);
 
-static __inline__ void __ipq_unlink(struct ipq *qp)
-{
-	hlist_del(&qp->q.list);
-	list_del(&qp->q.lru_list);
-	ip4_frags.nqueues--;
-}
-
-static __inline__ void ipq_unlink(struct ipq *ipq)
-{
-	write_lock(&ip4_frags.lock);
-	__ipq_unlink(ipq);
-	write_unlock(&ip4_frags.lock);
-}
-
 static unsigned int ipqhashfn(__be16 id, __be32 saddr, __be32 daddr, u8 prot)
 {
 	return jhash_3words((__force u32)id << 16 | prot,
@@ -222,14 +208,7 @@ static __inline__ void ipq_put(struct ipq *ipq, int *work)
  */
 static void ipq_kill(struct ipq *ipq)
 {
-	if (del_timer(&ipq->q.timer))
+	inet_frag_kill(&ipq->q, &ip4_frags);
-		atomic_dec(&ipq->q.refcnt);
-
-	if (!(ipq->q.last_in & COMPLETE)) {
-		ipq_unlink(ipq);
-		atomic_dec(&ipq->q.refcnt);
-		ipq->q.last_in |= COMPLETE;
-	}
 }
 
 /* Memory limiting on fragments.  Evictor trashes the oldest

net/ipv6/netfilter/nf_conntrack_reasm.c

@@ -79,20 +79,6 @@ struct inet_frags_ctl nf_frags_ctl __read_mostly = {
 
 static struct inet_frags nf_frags;
 
-static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
-{
-	hlist_del(&fq->q.list);
-	list_del(&fq->q.lru_list);
-	nf_frags.nqueues--;
-}
-
-static __inline__ void fq_unlink(struct nf_ct_frag6_queue *fq)
-{
-	write_lock(&nf_frags.lock);
-	__fq_unlink(fq);
-	write_unlock(&nf_frags.lock);
-}
-
 static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
 			       struct in6_addr *daddr)
 {
@@ -213,14 +199,7 @@ static __inline__ void fq_put(struct nf_ct_frag6_queue *fq, unsigned int *work)
  */
 static __inline__ void fq_kill(struct nf_ct_frag6_queue *fq)
 {
-	if (del_timer(&fq->q.timer))
+	inet_frag_kill(&fq->q, &nf_frags);
-		atomic_dec(&fq->q.refcnt);
-
-	if (!(fq->q.last_in & COMPLETE)) {
-		fq_unlink(fq);
-		atomic_dec(&fq->q.refcnt);
-		fq->q.last_in |= COMPLETE;
-	}
 }
 
 static void nf_ct_frag6_evictor(void)

net/ipv6/reassembly.c

@@ -104,20 +104,6 @@ int ip6_frag_mem(void)
 static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
 			  struct net_device *dev);
 
-static __inline__ void __fq_unlink(struct frag_queue *fq)
-{
-	hlist_del(&fq->q.list);
-	list_del(&fq->q.lru_list);
-	ip6_frags.nqueues--;
-}
-
-static __inline__ void fq_unlink(struct frag_queue *fq)
-{
-	write_lock(&ip6_frags.lock);
-	__fq_unlink(fq);
-	write_unlock(&ip6_frags.lock);
-}
-
 /*
  * callers should be careful not to use the hash value outside the ipfrag_lock
  * as doing so could race with ipfrag_hash_rnd being recalculated.
@@ -240,14 +226,7 @@ static __inline__ void fq_put(struct frag_queue *fq, int *work)
  */
 static __inline__ void fq_kill(struct frag_queue *fq)
 {
-	if (del_timer(&fq->q.timer))
+	inet_frag_kill(&fq->q, &ip6_frags);
-		atomic_dec(&fq->q.refcnt);
-
-	if (!(fq->q.last_in & COMPLETE)) {
-		fq_unlink(fq);
-		atomic_dec(&fq->q.refcnt);
-		fq->q.last_in |= COMPLETE;
-	}
 }
 
 static void ip6_evictor(struct inet6_dev *idev)