224     int ufd;  in receive_ufd_features()  local
227     ufd = uffd_open(O_CLOEXEC);  in receive_ufd_features()
228     if (ufd == -1) {  in receive_ufd_features()
236     if (ioctl(ufd, UFFDIO_API, &api_struct)) {  in receive_ufd_features()
246     close(ufd);  in receive_ufd_features()
259 static bool request_ufd_features(int ufd, uint64_t features)  in request_ufd_features()  argument
266     if (ioctl(ufd, UFFDIO_API, &api_struct)) {  in request_ufd_features()
283 static bool ufd_check_and_apply(int ufd, MigrationIncomingState *mis,  in ufd_check_and_apply()  argument
318     if (!request_ufd_features(ufd, asked_features)) {  in ufd_check_and_apply()
376     int ufd = -1;  in postcopy_ram_supported_by_host()  local
389     ufd = uffd_open(O_CLOEXEC);  in postcopy_ram_supported_by_host()
390     if (ufd == -1) {  in postcopy_ram_supported_by_host()
401     if (!ufd_check_and_apply(ufd, mis, errp)) {  in postcopy_ram_supported_by_host()
450     if (ioctl(ufd, UFFDIO_REGISTER, &reg_struct)) {  in postcopy_ram_supported_by_host()
457     if (ioctl(ufd, UFFDIO_UNREGISTER, &range_struct)) {  in postcopy_ram_supported_by_host()
477     if (ufd != -1) {  in postcopy_ram_supported_by_host()
478         close(ufd);  in postcopy_ram_supported_by_host()