Hesham/wintun
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Initialize ActiveTransactionCount to 1

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This always sets the reference counter to predictable state on resume
and eliminates the need to bump it on pausing.

Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2019-04-11 15:08:45 +02:00
parent 5cecd1536c
commit d3cc0570de
1 changed files with 5 additions and 3 deletions
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8
wintun.c
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@ -359,7 +359,7 @@ static NTSTATUS TunWriteIntoIrp(_Inout_ IRP *Irp, _Inout_ UCHAR *buffer, _In_ NE
_IRQL_requires_same_ _IRQL_requires_same_
static void TunNBLRefInit(_Inout_ TUN_CTX *ctx, _Inout_ NET_BUFFER_LIST *nbl) static void TunNBLRefInit(_Inout_ TUN_CTX *ctx, _Inout_ NET_BUFFER_LIST *nbl)
{ {
InterlockedAdd64(&ctx->ActiveTransactionCount, 1); InterlockedIncrement64(&ctx->ActiveTransactionCount);
InterlockedAdd(&ctx->PacketQueue.NumNbl, 1); InterlockedAdd(&ctx->PacketQueue.NumNbl, 1);
InterlockedExchange64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl), 1); InterlockedExchange64(NET_BUFFER_LIST_MINIPORT_RESERVED_REFCOUNT(nbl), 1);
} }
@ -767,7 +767,6 @@ static NDIS_STATUS TunPause(NDIS_HANDLE MiniportAdapterContext, PNDIS_MINIPORT_P
{ {
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext; TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
InterlockedIncrement64(&ctx->ActiveTransactionCount);
InterlockedExchange((LONG *)&ctx->State, TUN_STATE_PAUSING); InterlockedExchange((LONG *)&ctx->State, TUN_STATE_PAUSING);
TunQueueClear(ctx); TunQueueClear(ctx);
@ -781,7 +780,10 @@ static NDIS_STATUS TunRestart(NDIS_HANDLE MiniportAdapterContext, PNDIS_MINIPORT
{ {
TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext; TUN_CTX *ctx = (TUN_CTX *)MiniportAdapterContext;
//InterlockedExchange((LONG *)&ctx->State, TUN_STATE_RESTARTING); InterlockedExchange((LONG *)&ctx->State, TUN_STATE_RESTARTING);
InterlockedExchange64(&ctx->ActiveTransactionCount, 1);
InterlockedExchange((LONG *)&ctx->State, TUN_STATE_RUNNING); InterlockedExchange((LONG *)&ctx->State, TUN_STATE_RUNNING);
return NDIS_STATUS_SUCCESS; return NDIS_STATUS_SUCCESS;
} }