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virtio_stor_utils.c
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virtio_stor_utils.c
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/*
* This file contains debug print routine implementation.
*
* Copyright (c) 2008-2017 Red Hat, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met :
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and / or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of their contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include"virtio_stor_utils.h"
#include "kdebugprint.h"
#include <ntstrsafe.h>
// Global debug printout level and enable\disable flag
int virtioDebugLevel;
int bDebugPrint;
int nViostorDebugLevel;
#if !defined(EVENT_TRACING)
#if defined(COM_DEBUG)
#define RHEL_DEBUG_PORT ((PUCHAR)0x3F8)
#define TEMP_BUFFER_SIZE 256
static void DebugPrintFuncSerial(const char *format, ...)
{
char buf[TEMP_BUFFER_SIZE];
NTSTATUS status;
size_t len;
va_list list;
va_start(list, format);
status = RtlStringCbVPrintfA(buf, sizeof(buf), format, list);
if (status == STATUS_SUCCESS)
{
len = strlen(buf);
}
else
{
len = 2;
buf[0] = 'O';
buf[1] = '\n';
}
if (len)
{
WRITE_PORT_BUFFER_UCHAR(RHEL_DEBUG_PORT, (PUCHAR)buf, len);
WRITE_PORT_UCHAR(RHEL_DEBUG_PORT, '\r');
}
va_end(list);
}
#endif
#if defined(PRINT_DEBUG)
static void DebugPrintFunc(const char *format, ...)
{
va_list list;
va_start(list, format);
vDbgPrintEx(DPFLTR_DEFAULT_ID, 9 | DPFLTR_MASK, format, list);
va_end(list);
}
#endif
static void DebugPrintFuncWPP(const char *format, ...)
{
// TODO later, if needed
}
static void NoDebugPrintFunc(const char *format, ...)
{
}
void InitializeDebugPrints(IN PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
{
//TBD - Read nDebugLevel and bDebugPrint from the registry
bDebugPrint = 1;
virtioDebugLevel = 0;
nViostorDebugLevel = TRACE_LEVEL_ERROR;//TRACE_LEVEL_VERBOSE;//
#if defined(PRINT_DEBUG)
VirtioDebugPrintProc = DebugPrintFunc;
#elif defined(COM_DEBUG)
VirtioDebugPrintProc = DebugPrintFuncSerial;
#else
VirtioDebugPrintProc = NoDebugPrintFunc;
#endif
}
tDebugPrintFunc VirtioDebugPrintProc;
#else
#include "virtio_stor_trace.h"
bDebugPrint = 1;
virtioDebugLevel = 0xFF;
nViostorDebugLevel = 0xFF;
tDebugPrintFunc VirtioDebugPrintProc = DbgPrint;
#endif