static
VOID
PvfsFreeIrpContext(
PPVFS_IRP_CONTEXT *ppIrpContext
)
{
PPVFS_IRP_CONTEXT pIrpCtx = NULL;
if (ppIrpContext && *ppIrpContext)
{
pIrpCtx = *ppIrpContext;
if (pIrpCtx->pIrp &&
PvfsIrpContextCheckFlag(pIrpCtx, PVFS_IRP_CTX_FLAG_PENDED))
{
pIrpCtx->pIrp->IoStatusBlock.Status = STATUS_FILE_CLOSED;
PvfsAsyncIrpComplete(pIrpCtx);
}
if (pIrpCtx->pFcb)
{
PvfsReleaseFCB(&pIrpCtx->pFcb);
}
pthread_mutex_destroy(&pIrpCtx->Mutex);
PVFS_FREE(ppIrpContext);
InterlockedDecrement(&gPvfsIrpContextCount);
}
}
NTSTATUS
PvfsReadDirectoryChange(
PPVFS_IRP_CONTEXT pIrpContext
)
{
NTSTATUS ntError = STATUS_UNSUCCESSFUL;
PIRP pIrp = pIrpContext->pIrp;
IRP_ARGS_READ_DIRECTORY_CHANGE Args = pIrp->Args.ReadDirectoryChange;
PPVFS_CCB pCcb = NULL;
PULONG pMaxBufferSize = Args.MaxBufferSize;
/* Sanity checks */
ntError = PvfsAcquireCCB(pIrp->FileHandle, &pCcb);
BAIL_ON_NT_STATUS(ntError);
if (!IsSetFlag(pCcb->Flags, PVFS_CCB_FLAG_CREATE_COMPLETE))
{
ntError = STATUS_INVALID_PARAMETER;
BAIL_ON_NT_STATUS(ntError);
}
if (!PVFS_IS_DIR(pCcb))
{
ntError = STATUS_NOT_A_DIRECTORY;
BAIL_ON_NT_STATUS(ntError);
}
ntError = PvfsAccessCheckFileHandle(pCcb, FILE_LIST_DIRECTORY);
BAIL_ON_NT_STATUS(ntError);
BAIL_ON_INVALID_PTR(Args.Buffer, ntError);
BAIL_ON_ZERO_LENGTH(Args.Length, ntError);
/* If we have something in the buffer, return that immediately. Else
register a notification filter */
LWIO_ASSERT(pCcb->pScb->pOwnerFcb);
ntError = PvfsNotifyReportBufferedChanges(
pCcb,
pCcb->pScb->pOwnerFcb,
pIrpContext);
if (ntError == STATUS_NOT_FOUND)
{
PvfsIrpMarkPending(pIrpContext, PvfsQueueCancelIrp, pIrpContext);
LWIO_ASSERT(pCcb->pScb->pOwnerFcb);
ntError = PvfsNotifyAddFilter(
pCcb->pScb->pOwnerFcb,
pIrpContext,
pCcb,
Args.NotifyFilter,
Args.WatchTree,
pMaxBufferSize);
if (ntError == STATUS_SUCCESS)
{
pIrpContext->QueueType = PVFS_QUEUE_TYPE_NOTIFY;
if (!pIrpContext->pScb)
{
pIrpContext->pScb = PvfsReferenceSCB(pCcb->pScb);
}
/* Allow the call to be cancelled while in the queue */
PvfsIrpContextClearFlag(pIrpContext, PVFS_IRP_CTX_FLAG_ACTIVE);
ntError = STATUS_PENDING;
goto cleanup;
}
}
BAIL_ON_NT_STATUS(ntError);
cleanup:
if (pCcb)
{
PvfsReleaseCCB(pCcb);
}
return ntError;
error:
if (PvfsIrpContextCheckFlag(pIrpContext, PVFS_IRP_CTX_FLAG_PENDED))
{
pIrpContext->pIrp->IoStatusBlock.Status = ntError;
PvfsCompleteIrpContext(pIrpContext);
}
goto cleanup;
}
