PFSRTL_PER_STREAM_CONTEXT NTAPI FsRtlRemovePerStreamContext	(	IN PFSRTL_ADVANCED_FCB_HEADER	AdvFcbHeader,
		IN PVOID OwnerId	OPTIONAL,
		IN PVOID InstanceId	OPTIONAL
	)

Definition at line 312 of file filtrctx.c.

{
    PLIST_ENTRY NextEntry;
    PFSRTL_PER_STREAM_CONTEXT TmpPerStreamContext, PerStreamContext = NULL;

    if (!(AdvFcbHeader) || !(AdvFcbHeader->Flags2 & FSRTL_FLAG2_SUPPORTS_FILTER_CONTEXTS))
    {
        return NULL;
    }

    ExAcquireFastMutex(AdvFcbHeader->FastMutex);
    /* If list is empty, no need to browse it */
    if (!IsListEmpty(&(AdvFcbHeader->FilterContexts)))
    {
        for (NextEntry = AdvFcbHeader->FilterContexts.Flink;
             NextEntry != &(AdvFcbHeader->FilterContexts);
             NextEntry = NextEntry->Flink)
        {
            /* If we don't have any criteria for search, first entry will be enough */
            if (!OwnerId && !InstanceId)
            {
                PerStreamContext = (PFSRTL_PER_STREAM_CONTEXT)NextEntry;
                break;
            }
            /* Else, we've to find something that matches with the parameters. */
            else
            {
                TmpPerStreamContext = CONTAINING_RECORD(NextEntry, FSRTL_PER_STREAM_CONTEXT, Links);
                if ((InstanceId && TmpPerStreamContext->InstanceId == InstanceId && TmpPerStreamContext->OwnerId == OwnerId) ||
                    (OwnerId && TmpPerStreamContext->OwnerId == OwnerId))
                {
                    PerStreamContext = TmpPerStreamContext;
                    break;
                }
            }
        }

        /* Finally remove entry from list */
        if (PerStreamContext)
        {
            RemoveEntryList(&(PerStreamContext->Links));
        }
    }
    ExReleaseFastMutex(AdvFcbHeader->FastMutex);

    return PerStreamContext;

}

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