in6_ifstat
COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
COUNTER_ARRAY_COPY(ifp->if_inet6->in6_ifstat,
sizeof(struct in6_ifstat) / sizeof(uint64_t));
COUNTER_ARRAY_FREE(ext->in6_ifstat,
sizeof(struct in6_ifstat) / sizeof(uint64_t));
struct in6_ifstat ifru_stat;
counter_u64_t in6_ifstat[sizeof(struct in6_ifstat) / sizeof(uint64_t)];
counter_u64_add((ifp)->if_inet6->in6_ifstat[ \
offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\