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Delay unmounting until all Slowio tasks are done.

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Preventing a crash when unmounting a filesystem with pending Slowio.
This commit is contained in:
Felix A. Croes 2019-06-20 15:49:02 +02:00
parent 02fd6906c2
commit bfd8dca62d
1 changed files with 56 additions and 13 deletions
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49
tst/memfs-dotnet/Program.cs
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@ -287,6 +287,20 @@ namespace memfs
return STATUS_SUCCESS;
}
#if MEMFS_SLOWIO
public override int Mounted(object Host)
{
SlowioTasksRunning = 0;
return STATUS_SUCCESS;
}
public override void Unmounted(object Host)
{
while (SlowioTasksRunning != 0)
Thread.Sleep(1000);
}
#endif
public override Int32 GetVolumeInfo(
out VolumeInfo VolumeInfo)
{
@ -592,7 +606,7 @@ namespace memfs
Thread.Sleep(TimeSpan.FromMilliseconds(Millis));
}
void SlowioReadTask(
private void SlowioReadTask(
Object FileNode0,
IntPtr Buffer,
UInt64 Offset,
@ -606,9 +620,10 @@ namespace memfs
Marshal.Copy(FileNode.FileData, (int)Offset, Buffer, (int)BytesTransferred);
Host.SendReadResponse(RequestHint, STATUS_SUCCESS, BytesTransferred);
Interlocked.Decrement(ref SlowioTasksRunning);
}
void SlowioWriteTask(
private void SlowioWriteTask(
Object FileNode0,
IntPtr Buffer,
UInt64 Offset,
@ -623,9 +638,10 @@ namespace memfs
Marshal.Copy(Buffer, FileNode.FileData, (int)Offset, (int)BytesTransferred);
Host.SendWriteResponse(RequestHint, STATUS_SUCCESS, BytesTransferred, ref FileInfo);
Interlocked.Decrement(ref SlowioTasksRunning);
}
void SlowioReadDirectoryTask(
private void SlowioReadDirectoryTask(
Object FileNode0,
Object FileDesc,
String Pattern,
@ -638,7 +654,9 @@ namespace memfs
UInt32 BytesTransferred;
var Status = SeekableReadDirectory(FileNode0, FileDesc, Pattern, Marker, Buffer, Length, out BytesTransferred);
Host.SendReadDirectoryResponse(RequestHint, Status, BytesTransferred);
Interlocked.Decrement(ref SlowioTasksRunning);
}
#endif
@ -667,11 +685,19 @@ namespace memfs
if (SlowioReturnPending())
{
var Hint = Host.GetOperationRequestHint();
try
{
Interlocked.Increment(ref SlowioTasksRunning);
Task.Run(() => SlowioReadTask(FileNode0, Buffer, Offset, EndOffset, Hint)).ConfigureAwait(false);
BytesTransferred = 0;
return STATUS_PENDING;
}
catch (Exception)
{
Interlocked.Decrement(ref SlowioTasksRunning);
}
}
#endif
BytesTransferred = (UInt32)(EndOffset - Offset);
@ -727,12 +753,20 @@ namespace memfs
if (SlowioReturnPending())
{
var hint = Host.GetOperationRequestHint();
try
{
Interlocked.Increment(ref SlowioTasksRunning);
Task.Run(() => SlowioWriteTask(FileNode0, Buffer, Offset, EndOffset, hint)).ConfigureAwait(false);
BytesTransferred = 0;
FileInfo = default(FileInfo);
return STATUS_PENDING;
}
catch (Exception)
{
Interlocked.Decrement(ref SlowioTasksRunning);
}
}
#endif
BytesTransferred = (UInt32)(EndOffset - Offset);
@ -1031,11 +1065,19 @@ namespace memfs
if (SlowioReturnPending())
{
var Hint = Host.GetOperationRequestHint();
try
{
Interlocked.Increment(ref SlowioTasksRunning);
Task.Run(() => SlowioReadDirectoryTask(FileNode0, FileDesc, Pattern, Marker, Buffer, Length, Hint));
BytesTransferred = 0;
return STATUS_PENDING;
}
catch (Exception)
{
Interlocked.Decrement(ref SlowioTasksRunning);
}
}
return SeekableReadDirectory(FileNode0, FileDesc, Pattern, Marker, Buffer, Length, out BytesTransferred);
}
@ -1282,6 +1324,7 @@ namespace memfs
private UInt64 SlowioMaxDelay;
private UInt64 SlowioPercentDelay;
private UInt64 SlowioRarefyDelay;
private volatile Int32 SlowioTasksRunning;
private String VolumeLabel;
}