sctp6_sock
newinet->pinet6 = &((struct sctp6_sock *)newsk)->inet6;
.obj_size = sizeof(struct sctp6_sock),
.ipv6_pinfo_offset = offsetof(struct sctp6_sock, inet6),
.useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
.usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
offsetof(struct sctp6_sock, sctp.subscribe) +
sizeof_field(struct sctp6_sock, sctp.initmsg),