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Windows Driver: Make max work items count configurable. Increase default to 1024. Queue write IRPs.

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- Made the maximum work items count configurable to allow flexibility based on system needs.
  - Increased the default value of max work items count to 1024 to better handle high-throughput scenarios.
  - Queue write IRPs in system worker thread to avoid potential deadlocks in write scenarios.
This commit is contained in:
Mounir IDRASSI
2024-11-23 17:44:48 +01:00
parent 5a85c54c6e
commit 453ff2880e
5 changed files with 56 additions and 38 deletions
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13
src/Driver/Ntdriver.c
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@@ -145,6 +145,7 @@ static BOOL RamEncryptionActivated = FALSE;
int EncryptionIoRequestCount = 0;
int EncryptionItemCount = 0;
int EncryptionFragmentSize = 0;
int EncryptionMaxWorkItems = 0;
PDEVICE_OBJECT VirtualVolumeDeviceObjects[MAX_MOUNTED_VOLUME_DRIVE_NUMBER + 1];
@@ -2776,6 +2777,7 @@ NTSTATUS ProcessMainDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION Ex
if (ValidateIOBufferSize (Irp, sizeof (EncryptionQueueParameters), ValidateOutput))
{
EncryptionQueueParameters* pParams = (EncryptionQueueParameters*) Irp->AssociatedIrp.SystemBuffer;
pParams->EncryptionMaxWorkItems = EncryptionMaxWorkItems;
pParams->EncryptionFragmentSize = EncryptionFragmentSize;
pParams->EncryptionIoRequestCount = EncryptionIoRequestCount;
pParams->EncryptionItemCount = EncryptionItemCount;
@@ -4646,6 +4648,14 @@ NTSTATUS ReadRegistryConfigFlags (BOOL driverEntry)
TCfree (data);
}
if (driverEntry && NT_SUCCESS(TCReadRegistryKey(&name, VC_ENCRYPTION_MAX_WORK_ITEMS, &data)))
{
if (data->Type == REG_DWORD)
EncryptionMaxWorkItems = *(uint32*)data->Data;
TCfree(data);
}
if (driverEntry)
{
if (EncryptionIoRequestCount < TC_ENC_IO_QUEUE_PREALLOCATED_IO_REQUEST_COUNT)
@@ -4663,6 +4673,9 @@ NTSTATUS ReadRegistryConfigFlags (BOOL driverEntry)
EncryptionFragmentSize = TC_ENC_IO_QUEUE_MAX_FRAGMENT_SIZE;
else if (EncryptionFragmentSize > (8 * TC_ENC_IO_QUEUE_MAX_FRAGMENT_SIZE))
EncryptionFragmentSize = 8 * TC_ENC_IO_QUEUE_MAX_FRAGMENT_SIZE;
if (EncryptionMaxWorkItems == 0)
EncryptionMaxWorkItems = VC_MAX_WORK_ITEMS;
}