271 Result<void> PreAllocateLoopDevices(size_t num) {  in PreAllocateLoopDevices()  argument
290   for (size_t id = 0ul, cnt = 0; cnt < num; ++id) {  in PreAllocateLoopDevices()
317   LOG(INFO) << "Found " << (num - new_allocations)  in PreAllocateLoopDevices()
436 Result<LoopbackDeviceUniqueFd> WaitForDevice(int num) {  in WaitForDevice()  argument
439       StringPrintf("/dev/block/loop%d", num),  in WaitForDevice()
440       StringPrintf("/dev/loop%d", num),  in WaitForDevice()
465     PLOG(WARNING) << "Loopback device " << num << " not ready. Waiting 50ms...";  in WaitForDevice()
473   return Error() << "Failed to open loopback device " << num;  in WaitForDevice()
488   int num = ioctl(ctl_fd.get(), LOOP_CTL_GET_FREE);  in CreateLoopDevice()  local
489   if (num == -1) {  in CreateLoopDevice()
493   Result<LoopbackDeviceUniqueFd> loop_device = WaitForDevice(num);  in CreateLoopDevice()