- struct ipq *qp;
-#ifdef CONFIG_SMP
- struct hlist_node *n;
-#endif
-
- write_lock(&ip4_frags.lock);
-#ifdef CONFIG_SMP
- /* With SMP race we have to recheck hash table, because
- * such entry could be created on other cpu, while we
- * promoted read lock to write lock.
- */
- hlist_for_each_entry(qp, n, &ip4_frags.hash[hash], q.list) {
- if (qp->id == qp_in->id &&
- qp->saddr == qp_in->saddr &&
- qp->daddr == qp_in->daddr &&
- qp->protocol == qp_in->protocol &&
- qp->user == qp_in->user) {
- atomic_inc(&qp->q.refcnt);
- write_unlock(&ip4_frags.lock);
- qp_in->q.last_in |= COMPLETE;
- ipq_put(qp_in);
- return qp;
- }
- }
-#endif
- qp = qp_in;
-
- if (!mod_timer(&qp->q.timer, jiffies + ip4_frags_ctl.timeout))
- atomic_inc(&qp->q.refcnt);
-
- atomic_inc(&qp->q.refcnt);
- hlist_add_head(&qp->q.list, &ip4_frags.hash[hash]);
- INIT_LIST_HEAD(&qp->q.lru_list);
- list_add_tail(&qp->q.lru_list, &ip4_frags.lru_list);
- ip4_frags.nqueues++;
- write_unlock(&ip4_frags.lock);
- return qp;
-}