nf_conntrack_ecache_work
void nf_conntrack_ecache_work(struct net *net, enum nf_ct_ecache_state state);
nf_conntrack_ecache_work(nf_ct_net(ct), NFCT_ECACHE_DESTROY_FAIL);
nf_conntrack_ecache_work(net, NFCT_ECACHE_DESTROY_SENT);