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/* $Id: VSCSIVpdPagePool.cpp $ */
/** @file
* Virtual SCSI driver: VPD page pool
*/
/*
* Copyright (C) 2011-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_VSCSI
#include <VBox/log.h>
#include <VBox/err.h>
#include <iprt/mem.h>
#include <iprt/assert.h>
#include "VSCSIInternal.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* A VSCSI VPD page.
*/
typedef struct VSCSIVPDPAGE
{
/** List node. */
RTLISTNODE NodePages;
/** Page size. */
size_t cbPage;
/** Page data - variable size. */
uint8_t abPage[1];
} VSCSIVPDPAGE;
/** Pointer to a VPD page. */
typedef VSCSIVPDPAGE *PVSCSIVPDPAGE;
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
int vscsiVpdPagePoolInit(PVSCSIVPDPOOL pVScsiVpdPool)
{
RTListInit(&pVScsiVpdPool->ListPages);
return VINF_SUCCESS;
}
void vscsiVpdPagePoolDestroy(PVSCSIVPDPOOL pVScsiVpdPool)
{
PVSCSIVPDPAGE pIt, pItNext;
RTListForEachSafe(&pVScsiVpdPool->ListPages, pIt, pItNext, VSCSIVPDPAGE, NodePages)
{
RTListNodeRemove(&pIt->NodePages);
RTMemFree(pIt);
}
}
int vscsiVpdPagePoolAllocNewPage(PVSCSIVPDPOOL pVScsiVpdPool, uint8_t uPage, size_t cbPage, uint8_t **ppbPage)
{
int rc = VINF_SUCCESS;
PVSCSIVPDPAGE pPage;
/* Check that the page doesn't exist already. */
RTListForEach(&pVScsiVpdPool->ListPages, pPage, VSCSIVPDPAGE, NodePages)
{
if (pPage->abPage[1] == uPage)
return VERR_ALREADY_EXISTS;
}
pPage = (PVSCSIVPDPAGE)RTMemAllocZ(RT_UOFFSETOF_DYN(VSCSIVPDPAGE, abPage[cbPage]));
if (pPage)
{
pPage->cbPage = cbPage;
pPage->abPage[1] = uPage;
RTListAppend(&pVScsiVpdPool->ListPages, &pPage->NodePages);
*ppbPage = &pPage->abPage[0];
}
else
rc = VERR_NO_MEMORY;
return rc;
}
int vscsiVpdPagePoolQueryPage(PVSCSIVPDPOOL pVScsiVpdPool, PVSCSIREQINT pVScsiReq, uint8_t uPage)
{
PVSCSIVPDPAGE pPage;
/* Check that the page doesn't exist already. */
RTListForEach(&pVScsiVpdPool->ListPages, pPage, VSCSIVPDPAGE, NodePages)
{
if (pPage->abPage[1] == uPage)
{
RTSgBufCopyFromBuf(&pVScsiReq->SgBuf, &pPage->abPage[0], pPage->cbPage);
return VINF_SUCCESS;
}
}
return VERR_NOT_FOUND;
}
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