pf_nvint
PFNV_CHK(pf_nvint(nvl, "tblidx", &kpool->tblidx));
PFNV_CHK(pf_nvint(nvl, "rtableid", &rule->rtableid));
PFNV_CHK(pf_nvint(nvl, "proto", &kill->psk_proto));
int pf_nvint(const nvlist_t *, const char *, int *);