+ kfree(p);
+ return;
+ }
+ }
+ BUG_TRAP(0);
+}
+EXPORT_SYMBOL(tcf_hash_destroy);
+
+int tcf_hash_release(struct tcf_common *p, int bind,
+ struct tcf_hashinfo *hinfo)
+{
+ int ret = 0;
+
+ if (p) {
+ if (bind)
+ p->tcfc_bindcnt--;
+
+ p->tcfc_refcnt--;
+ if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
+ tcf_hash_destroy(p, hinfo);
+ ret = 1;
+ }
+ }
+ return ret;
+}
+EXPORT_SYMBOL(tcf_hash_release);
+
+static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb,
+ struct tc_action *a, struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p;
+ int err = 0, index = -1,i = 0, s_i = 0, n_i = 0;
+ struct rtattr *r ;
+
+ read_lock(hinfo->lock);
+
+ s_i = cb->args[0];
+
+ for (i = 0; i < (hinfo->hmask + 1); i++) {
+ p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
+
+ for (; p; p = p->tcfc_next) {
+ index++;
+ if (index < s_i)
+ continue;
+ a->priv = p;
+ a->order = n_i;
+ r = (struct rtattr*) skb->tail;
+ RTA_PUT(skb, a->order, 0, NULL);
+ err = tcf_action_dump_1(skb, a, 0, 0);
+ if (err < 0) {
+ index--;
+ skb_trim(skb, (u8*)r - skb->data);
+ goto done;
+ }
+ r->rta_len = skb->tail - (u8*)r;
+ n_i++;
+ if (n_i >= TCA_ACT_MAX_PRIO)
+ goto done;
+ }
+ }
+done:
+ read_unlock(hinfo->lock);
+ if (n_i)
+ cb->args[0] += n_i;
+ return n_i;
+
+rtattr_failure:
+ skb_trim(skb, (u8*)r - skb->data);
+ goto done;
+}
+
+static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a,
+ struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p, *s_p;
+ struct rtattr *r ;
+ int i= 0, n_i = 0;
+
+ r = (struct rtattr*) skb->tail;
+ RTA_PUT(skb, a->order, 0, NULL);
+ RTA_PUT(skb, TCA_KIND, IFNAMSIZ, a->ops->kind);
+ for (i = 0; i < (hinfo->hmask + 1); i++) {
+ p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
+
+ while (p != NULL) {
+ s_p = p->tcfc_next;
+ if (ACT_P_DELETED == tcf_hash_release(p, 0, hinfo))
+ module_put(a->ops->owner);
+ n_i++;
+ p = s_p;
+ }
+ }
+ RTA_PUT(skb, TCA_FCNT, 4, &n_i);
+ r->rta_len = skb->tail - (u8*)r;
+
+ return n_i;
+rtattr_failure:
+ skb_trim(skb, (u8*)r - skb->data);
+ return -EINVAL;
+}
+
+int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
+ int type, struct tc_action *a)
+{
+ struct tcf_hashinfo *hinfo = a->ops->hinfo;
+
+ if (type == RTM_DELACTION) {
+ return tcf_del_walker(skb, a, hinfo);
+ } else if (type == RTM_GETACTION) {
+ return tcf_dump_walker(skb, cb, a, hinfo);
+ } else {
+ printk("tcf_generic_walker: unknown action %d\n", type);
+ return -EINVAL;
+ }
+}
+EXPORT_SYMBOL(tcf_generic_walker);
+
+struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p;
+
+ read_lock(hinfo->lock);
+ for (p = hinfo->htab[tcf_hash(index, hinfo->hmask)]; p;
+ p = p->tcfc_next) {
+ if (p->tcfc_index == index)
+ break;
+ }
+ read_unlock(hinfo->lock);
+
+ return p;
+}
+EXPORT_SYMBOL(tcf_hash_lookup);
+
+u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo)
+{
+ u32 val = *idx_gen;
+
+ do {
+ if (++val == 0)
+ val = 1;
+ } while (tcf_hash_lookup(val, hinfo));
+
+ return (*idx_gen = val);
+}
+EXPORT_SYMBOL(tcf_hash_new_index);
+
+int tcf_hash_search(struct tc_action *a, u32 index)
+{
+ struct tcf_hashinfo *hinfo = a->ops->hinfo;
+ struct tcf_common *p = tcf_hash_lookup(index, hinfo);
+
+ if (p) {
+ a->priv = p;
+ return 1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(tcf_hash_search);
+
+struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a, int bind,
+ struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p = NULL;
+ if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
+ if (bind) {
+ p->tcfc_bindcnt++;
+ p->tcfc_refcnt++;
+ }
+ a->priv = p;
+ }
+ return p;
+}
+EXPORT_SYMBOL(tcf_hash_check);
+
+struct tcf_common *tcf_hash_create(u32 index, struct rtattr *est, struct tc_action *a, int size, int bind, u32 *idx_gen, struct tcf_hashinfo *hinfo)
+{
+ struct tcf_common *p = kzalloc(size, GFP_KERNEL);
+
+ if (unlikely(!p))
+ return p;
+ p->tcfc_refcnt = 1;
+ if (bind)
+ p->tcfc_bindcnt = 1;
+
+ spin_lock_init(&p->tcfc_lock);
+ p->tcfc_stats_lock = &p->tcfc_lock;
+ p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo);
+ p->tcfc_tm.install = jiffies;
+ p->tcfc_tm.lastuse = jiffies;
+#ifdef CONFIG_NET_ESTIMATOR
+ if (est)
+ gen_new_estimator(&p->tcfc_bstats, &p->tcfc_rate_est,
+ p->tcfc_stats_lock, est);