+struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
+ unsigned short family)
+{
+ struct xfrm_state *x;
+ struct xfrm_state_walk *w;
+
+ spin_lock_bh(&net->xfrm.xfrm_state_lock);
+ list_for_each_entry(w, &net->xfrm.state_all, all) {
+ x = container_of(w, struct xfrm_state, km);
+ if (x->props.family != family ||
+ x->id.spi != spi)
+ continue;
+
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ xfrm_state_hold(x);
+ return x;
+ }
+ spin_unlock_bh(&net->xfrm.xfrm_state_lock);
+ return NULL;
+}
+EXPORT_SYMBOL(xfrm_state_lookup_byspi);
+