992 static int mptcp_put_subflow_data(struct mptcp_subflow_data *sfd,  in mptcp_put_subflow_data()  argument
997 	u32 copylen = min_t(u32, sfd->size_subflow_data, sizeof(*sfd));  in mptcp_put_subflow_data()
1000 		copied += sfd->size_subflow_data;  in mptcp_put_subflow_data()
1007 	if (copy_to_user(optval, sfd, copylen))  in mptcp_put_subflow_data()
1013 static int mptcp_get_subflow_data(struct mptcp_subflow_data *sfd,  in mptcp_get_subflow_data()  argument
1025 	BUILD_BUG_ON(sizeof(*sfd) != MIN_INFO_OPTLEN_SIZE);  in mptcp_get_subflow_data()
1030 	memset(sfd, 0, sizeof(*sfd));  in mptcp_get_subflow_data()
1032 	copylen = min_t(unsigned int, len, sizeof(*sfd));  in mptcp_get_subflow_data()
1033 	if (copy_from_user(sfd, optval, copylen))  in mptcp_get_subflow_data()
1037 	if (sfd->size_subflow_data > INT_MAX ||  in mptcp_get_subflow_data()
1038 	    sfd->size_user > INT_MAX)  in mptcp_get_subflow_data()
1041 	if (sfd->size_subflow_data < MIN_INFO_OPTLEN_SIZE ||  in mptcp_get_subflow_data()
1042 	    sfd->size_subflow_data > len)  in mptcp_get_subflow_data()
1045 	if (sfd->num_subflows || sfd->size_kernel)  in mptcp_get_subflow_data()
1048 	return len - sfd->size_subflow_data;  in mptcp_get_subflow_data()
1057 	struct mptcp_subflow_data sfd;  in mptcp_getsockopt_tcpinfo()  local
1061 	len = mptcp_get_subflow_data(&sfd, optval, optlen);  in mptcp_getsockopt_tcpinfo()
1065 	sfd.size_kernel = sizeof(struct tcp_info);  in mptcp_getsockopt_tcpinfo()
1066 	sfd.size_user = min_t(unsigned int, sfd.size_user,  in mptcp_getsockopt_tcpinfo()
1069 	infoptr = optval + sfd.size_subflow_data;  in mptcp_getsockopt_tcpinfo()
1078 		if (len && len >= sfd.size_user) {  in mptcp_getsockopt_tcpinfo()
1083 			if (copy_to_user(infoptr, &info, sfd.size_user)) {  in mptcp_getsockopt_tcpinfo()
1088 			infoptr += sfd.size_user;  in mptcp_getsockopt_tcpinfo()
1089 			copied += sfd.size_user;  in mptcp_getsockopt_tcpinfo()
1090 			len -= sfd.size_user;  in mptcp_getsockopt_tcpinfo()
1096 	sfd.num_subflows = sfcount;  in mptcp_getsockopt_tcpinfo()
1098 	if (mptcp_put_subflow_data(&sfd, optval, copied, optlen))  in mptcp_getsockopt_tcpinfo()
1149 	struct mptcp_subflow_data sfd;  in mptcp_getsockopt_subflow_addrs()  local
1153 	len = mptcp_get_subflow_data(&sfd, optval, optlen);  in mptcp_getsockopt_subflow_addrs()
1157 	sfd.size_kernel = sizeof(struct mptcp_subflow_addrs);  in mptcp_getsockopt_subflow_addrs()
1158 	sfd.size_user = min_t(unsigned int, sfd.size_user,  in mptcp_getsockopt_subflow_addrs()
1161 	addrptr = optval + sfd.size_subflow_data;  in mptcp_getsockopt_subflow_addrs()
1170 		if (len && len >= sfd.size_user) {  in mptcp_getsockopt_subflow_addrs()
1175 			if (copy_to_user(addrptr, &a, sfd.size_user)) {  in mptcp_getsockopt_subflow_addrs()
1180 			addrptr += sfd.size_user;  in mptcp_getsockopt_subflow_addrs()
1181 			copied += sfd.size_user;  in mptcp_getsockopt_subflow_addrs()
1182 			len -= sfd.size_user;  in mptcp_getsockopt_subflow_addrs()
1188 	sfd.num_subflows = sfcount;  in mptcp_getsockopt_subflow_addrs()
1190 	if (mptcp_put_subflow_data(&sfd, optval, copied, optlen))  in mptcp_getsockopt_subflow_addrs()