Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6-omap-h63xx.git] / net / ipv6 / reassembly.c

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 02e4e855b9270b1107107ff458cc831a3d5eac51..76c88a93b9b5a7714678a0ccb28aa140aa4e4998 100644 (file)
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -143,6 +143,18 @@ static unsigned int ip6_hashfn(struct inet_frag_queue *q)
        return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr);
 }
 
+int ip6_frag_match(struct inet_frag_queue *q, void *a)
+{
+       struct frag_queue *fq;
+       struct ip6_create_arg *arg = a;
+
+       fq = container_of(q, struct frag_queue, q);
+       return (fq->id == arg->id &&
+                       ipv6_addr_equal(&fq->saddr, arg->src) &&
+                       ipv6_addr_equal(&fq->daddr, arg->dst));
+}
+EXPORT_SYMBOL(ip6_frag_match);
+
 /* Memory Tracking Functions. */
 static inline void frag_kfree_skb(struct sk_buff *skb, int *work)
 {
@@ -152,27 +164,22 @@ static inline void frag_kfree_skb(struct sk_buff *skb, int *work)
        kfree_skb(skb);
 }
 
-static void ip6_frag_free(struct inet_frag_queue *fq)
+void ip6_frag_init(struct inet_frag_queue *q, void *a)
 {
-       kfree(container_of(fq, struct frag_queue, q));
-}
-
-static inline struct frag_queue *frag_alloc_queue(void)
-{
-       struct frag_queue *fq = kzalloc(sizeof(struct frag_queue), GFP_ATOMIC);
+       struct frag_queue *fq = container_of(q, struct frag_queue, q);
+       struct ip6_create_arg *arg = a;
 
-       if(!fq)
-               return NULL;
-       atomic_add(sizeof(struct frag_queue), &ip6_frags.mem);
-       return fq;
+       fq->id = arg->id;
+       ipv6_addr_copy(&fq->saddr, arg->src);
+       ipv6_addr_copy(&fq->daddr, arg->dst);
 }
+EXPORT_SYMBOL(ip6_frag_init);
 
 /* Destruction primitives. */
 
-static __inline__ void fq_put(struct frag_queue *fq, int *work)
+static __inline__ void fq_put(struct frag_queue *fq)
 {
-       if (atomic_dec_and_test(&fq->q.refcnt))
-               inet_frag_destroy(&fq->q, &ip6_frags, work);
+       inet_frag_put(&fq->q, &ip6_frags);
 }
 
 /* Kill fq entry. It is not destroyed immediately,
@@ -194,9 +201,11 @@ static void ip6_evictor(struct inet6_dev *idev)
 
 static void ip6_frag_expire(unsigned long data)
 {
-       struct frag_queue *fq = (struct frag_queue *) data;
+       struct frag_queue *fq;
        struct net_device *dev = NULL;
 
+       fq = container_of((struct inet_frag_queue *)data, struct frag_queue, q);
+
        spin_lock(&fq->q.lock);
 
        if (fq->q.last_in & COMPLETE)
@@ -228,101 +237,33 @@ out:
        if (dev)
                dev_put(dev);
        spin_unlock(&fq->q.lock);
-       fq_put(fq, NULL);
+       fq_put(fq);
 }
 
-/* Creation primitives. */
-
-
-static struct frag_queue *ip6_frag_intern(struct frag_queue *fq_in)
+static __inline__ struct frag_queue *
+fq_find(__be32 id, struct in6_addr *src, struct in6_addr *dst,
+       struct inet6_dev *idev)
 {
-       struct frag_queue *fq;
+       struct inet_frag_queue *q;
+       struct ip6_create_arg arg;
        unsigned int hash;
-#ifdef CONFIG_SMP
-       struct hlist_node *n;
-#endif
 
-       write_lock(&ip6_frags.lock);
-       hash = ip6qhashfn(fq_in->id, &fq_in->saddr, &fq_in->daddr);
-#ifdef CONFIG_SMP
-       hlist_for_each_entry(fq, n, &ip6_frags.hash[hash], q.list) {
-               if (fq->id == fq_in->id &&
-                   ipv6_addr_equal(&fq_in->saddr, &fq->saddr) &&
-                   ipv6_addr_equal(&fq_in->daddr, &fq->daddr)) {
-                       atomic_inc(&fq->q.refcnt);
-                       write_unlock(&ip6_frags.lock);
-                       fq_in->q.last_in |= COMPLETE;
-                       fq_put(fq_in, NULL);
-                       return fq;
-               }
-       }
-#endif
-       fq = fq_in;
-
-       if (!mod_timer(&fq->q.timer, jiffies + ip6_frags_ctl.timeout))
-               atomic_inc(&fq->q.refcnt);
-
-       atomic_inc(&fq->q.refcnt);
-       hlist_add_head(&fq->q.list, &ip6_frags.hash[hash]);
-       INIT_LIST_HEAD(&fq->q.lru_list);
-       list_add_tail(&fq->q.lru_list, &ip6_frags.lru_list);
-       ip6_frags.nqueues++;
-       write_unlock(&ip6_frags.lock);
-       return fq;
-}
-
-
-static struct frag_queue *
-ip6_frag_create(__be32 id, struct in6_addr *src, struct in6_addr *dst,
-               struct inet6_dev *idev)
-{
-       struct frag_queue *fq;
+       arg.id = id;
+       arg.src = src;
+       arg.dst = dst;
+       hash = ip6qhashfn(id, src, dst);
 
-       if ((fq = frag_alloc_queue()) == NULL)
+       q = inet_frag_find(&ip6_frags, &arg, hash);
+       if (q == NULL)
                goto oom;
 
-       fq->id = id;
-       ipv6_addr_copy(&fq->saddr, src);
-       ipv6_addr_copy(&fq->daddr, dst);
-
-       init_timer(&fq->q.timer);
-       fq->q.timer.function = ip6_frag_expire;
-       fq->q.timer.data = (long) fq;
-       spin_lock_init(&fq->q.lock);
-       atomic_set(&fq->q.refcnt, 1);
-
-       return ip6_frag_intern(fq);
+       return container_of(q, struct frag_queue, q);
 
 oom:
        IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
        return NULL;
 }
 
-static __inline__ struct frag_queue *
-fq_find(__be32 id, struct in6_addr *src, struct in6_addr *dst,
-       struct inet6_dev *idev)
-{
-       struct frag_queue *fq;
-       struct hlist_node *n;
-       unsigned int hash;
-
-       read_lock(&ip6_frags.lock);
-       hash = ip6qhashfn(id, src, dst);
-       hlist_for_each_entry(fq, n, &ip6_frags.hash[hash], q.list) {
-               if (fq->id == id &&
-                   ipv6_addr_equal(src, &fq->saddr) &&
-                   ipv6_addr_equal(dst, &fq->daddr)) {
-                       atomic_inc(&fq->q.refcnt);
-                       read_unlock(&ip6_frags.lock);
-                       return fq;
-               }
-       }
-       read_unlock(&ip6_frags.lock);
-
-       return ip6_frag_create(id, src, dst, idev);
-}
-
-
 static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                           struct frag_hdr *fhdr, int nhoff)
 {
@@ -629,9 +570,8 @@ out_fail:
        return -1;
 }
 
-static int ipv6_frag_rcv(struct sk_buff **skbp)
+static int ipv6_frag_rcv(struct sk_buff *skb)
 {
-       struct sk_buff *skb = *skbp;
        struct frag_hdr *fhdr;
        struct frag_queue *fq;
        struct ipv6hdr *hdr = ipv6_hdr(skb);
@@ -677,7 +617,7 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
                ret = ip6_frag_queue(fq, skb, fhdr, IP6CB(skb)->nhoff);
 
                spin_unlock(&fq->q.lock);
-               fq_put(fq, NULL);
+               fq_put(fq);
                return ret;
        }
 
@@ -699,8 +639,11 @@ void __init ipv6_frag_init(void)
 
        ip6_frags.ctl = &ip6_frags_ctl;
        ip6_frags.hashfn = ip6_hashfn;
-       ip6_frags.destructor = ip6_frag_free;
+       ip6_frags.constructor = ip6_frag_init;
+       ip6_frags.destructor = NULL;
        ip6_frags.skb_free = NULL;
        ip6_frags.qsize = sizeof(struct frag_queue);
+       ip6_frags.match = ip6_frag_match;
+       ip6_frags.frag_expire = ip6_frag_expire;
        inet_frags_init(&ip6_frags);
 }