[INET]: Consolidate frag queues freeing

Since we now allocate the queues in inet_fragment.c, we
can safely free it in the same place. The ->destructor
callback thus becomes optional for inet_frags.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/inet_fragment.c

@@ -136,7 +136,9 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
 		*work -= f->qsize;
 	atomic_sub(f->qsize, &f->mem);
 
-	f->destructor(q);
+	if (f->destructor)
+		f->destructor(q);
+	kfree(q);
 
 }
 EXPORT_SYMBOL(inet_frag_destroy);

net/ipv4/ip_fragment.c

@@ -171,7 +171,6 @@ static __inline__ void ip4_frag_free(struct inet_frag_queue *q)
 	qp = container_of(q, struct ipq, q);
 	if (qp->peer)
 		inet_putpeer(qp->peer);
-	kfree(qp);
 }
 
 

net/ipv6/netfilter/nf_conntrack_reasm.c

@@ -130,11 +130,6 @@ static inline void frag_kfree_skb(struct sk_buff *skb, unsigned int *work)
 	kfree_skb(skb);
 }
 
-static void nf_frag_free(struct inet_frag_queue *q)
-{
-	kfree(container_of(q, struct nf_ct_frag6_queue, q));
-}
-
 /* Destruction primitives. */
 
 static __inline__ void fq_put(struct nf_ct_frag6_queue *fq)
@@ -682,7 +677,7 @@ int nf_ct_frag6_init(void)
 	nf_frags.ctl = &nf_frags_ctl;
 	nf_frags.hashfn = nf_hashfn;
 	nf_frags.constructor = ip6_frag_init;
-	nf_frags.destructor = nf_frag_free;
+	nf_frags.destructor = NULL;
 	nf_frags.skb_free = nf_skb_free;
 	nf_frags.qsize = sizeof(struct nf_ct_frag6_queue);
 	nf_frags.match = ip6_frag_match;

net/ipv6/reassembly.c

@@ -175,11 +175,6 @@ void ip6_frag_init(struct inet_frag_queue *q, void *a)
 }
 EXPORT_SYMBOL(ip6_frag_init);
 
-static void ip6_frag_free(struct inet_frag_queue *fq)
-{
-	kfree(container_of(fq, struct frag_queue, q));
-}
-
 /* Destruction primitives. */
 
 static __inline__ void fq_put(struct frag_queue *fq)
@@ -645,7 +640,7 @@ void __init ipv6_frag_init(void)
 	ip6_frags.ctl = &ip6_frags_ctl;
 	ip6_frags.hashfn = ip6_hashfn;
 	ip6_frags.constructor = ip6_frag_init;
-	ip6_frags.destructor = ip6_frag_free;
+	ip6_frags.destructor = NULL;
 	ip6_frags.skb_free = NULL;
 	ip6_frags.qsize = sizeof(struct frag_queue);
 	ip6_frags.match = ip6_frag_match;