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#1860 Resolves USB transfer buffer submit errors and resubmit error tracking. Synchronizes the submit transfers method so that multi-threaded access doesn't cause accounting errors. Ignores LIBUSB_ERROR_BUSY when (re)submitting due to accounting errors. Comments out several P25 unrecognized messaging loggers. (#1950)

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Co-authored-by: sheirerd <sheirerd@ainfosec.com>
This commit is contained in:
Denny Sheirer
2024-08-21 03:27:44 -04:00
committed by GitHub
parent 142dd9d579
commit c3487411fb
2 changed files with 44 additions and 32 deletions
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52
src/main/java/io/github/dsheirer/source/tuner/usb/USBTunerController.java
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@@ -1,6 +1,6 @@
/*
* *****************************************************************************
* Copyright (C) 2014-2023 Dennis Sheirer
* Copyright (C) 2014-2024 Dennis Sheirer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -588,9 +588,14 @@ public abstract class USBTunerController extends TunerController
/**
* (Re)Submits the transfer for stream processing
*
* Note: synchronized used here because there can be multiple threads can invoke LibUsb.handleTimeoutEvents
* (scheduled thread pool and a dedicated shutdown thread) during tuner shutdown and this has caused transfer
* tracking issues.
*
* @param transfer to (re)submit
*/
private void submitTransfer(Transfer transfer)
private synchronized void submitTransfer(Transfer transfer)
{
int status = LibUsb.submitTransfer(transfer);
@@ -616,35 +621,34 @@ public abstract class USBTunerController extends TunerController
mAvailableTransfers.size() + "]");
}
}
else if(resubmitStatus == LibUsb.ERROR_BUSY)
{
//Ignore - this indicates the transfer was previously submitted and libusb is still working it.
}
else
{
//Add it back to the queue to try again later.
mErrorTransfers.add(transfer);
mTransferErrorCount++;
//Only log this if more than half of the total transfer buffers are in error-holding
if(mErrorTransfers.size() >= (mAvailableTransfers.size() / 2))
{
mLog.error("Attempt to resubmit previous error USB transfer buffer failed with status [" +
LibUsb.errorName(resubmitStatus) + "] - this may be temporary and has happened [" +
mTransferErrorCount + "] times so far. Transfer buffer holding queue (error/total) [" +
mErrorTransfers.size() + "/" + mAvailableTransfers.size() + "]");
}
}
}
}
else if(status == LibUsb.ERROR_BUSY)
{
//Ignore - this indicates the transfer was previously submitted and libusb is still working it. I'm not
//sure how this happens because we give libusb a transfer and it hands it back when it's full. If
//libusb is still working it, then why did it indicate the transfer was completed? So, we simply
//ignore this error code. Other libraries simply ignore the submit status code altogether.
}
else
{
mLog.error("USB transfer [" + transfer + "] submit attempt failed with error [" + LibUsb.errorName(status) +
"] - adding to error queue to resubmit later - this may be a temporary USB issue and has happened [" +
mTransferErrorCount + "] time(s) so far. Current transfer error queue (error/total) [" +
mErrorTransfers.size() + "/" + mAvailableTransfers.size() + "]");
mErrorTransfers.add(transfer);
mTransferErrorCount++;
//Only log this if more than half of the total transfer buffers are in error-holding
if(mErrorTransfers.size() >= (mAvailableTransfers.size() / 2))
{
mLog.error("Attempt to submit USB transfer buffer failed with status [" +
LibUsb.errorName(status) + "] - this may be temporary and has happened [" +
mTransferErrorCount + "] time(s) so far. Transfer buffer holding queue (error/total) [" +
mErrorTransfers.size() + "/" + mAvailableTransfers.size() + "]");
}
}
if(mErrorTransfers.size() >= mAvailableTransfers.size())
@@ -703,6 +707,14 @@ public abstract class USBTunerController extends TunerController
{
mInProgressTransfers.remove(transfer);
if(mErrorTransfers.contains(transfer))
{
mLog.warn("USB transfer [" + transfer + "] that was being tracked as an error transfer, has just been " +
"delivered as completed with transfer status [" + LibUsb.errorName(transfer.status()) +
"] - removing it from the transfer error queue");
mErrorTransfers.remove(transfer);
}
switch(transfer.status())
{
case LibUsb.TRANSFER_COMPLETED: