Storage/VSCSI/VSCSIIoReq.cpp

a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync/* $Id$ */
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync/** @file
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * Virtual SCSI driver: I/O request handling.
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync */
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync/*
65697a26b524640b83828b715160c798c43a0424vboxsync * Copyright (C) 2006-2011 Oracle Corporation
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync *
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * available from http://www.virtualbox.org. This file is free software;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * you can redistribute it and/or modify it under the terms of the GNU
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * General Public License (GPL) as published by the Free Software
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync */
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#define LOG_GROUP LOG_GROUP_VSCSI
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <VBox/log.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <VBox/err.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <VBox/types.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <VBox/vscsi.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <iprt/assert.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <iprt/mem.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include <iprt/asm.h>
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync#include "VSCSIInternal.h"
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsyncint vscsiIoReqFlushEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync{
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    int rc = VINF_SUCCESS;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSIIOREQINT pVScsiIoReq = NULL;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiIoReq = (PVSCSIIOREQINT)RTMemAllocZ(sizeof(VSCSIIOREQINT));
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    if (!pVScsiIoReq)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync        return VERR_NO_MEMORY;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiIoReq->pVScsiReq = pVScsiReq;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiIoReq->pVScsiLun = pVScsiLun;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiIoReq->enmTxDir  = VSCSIIOREQTXDIR_FLUSH;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    if (RT_FAILURE(rc))
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    {
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync        ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync        RTMemFree(pVScsiIoReq);
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    }
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    return rc;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync}
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsyncint vscsiIoReqTransferEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync                              VSCSIIOREQTXDIR enmTxDir, uint64_t uOffset,
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync                              size_t cbTransfer)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync{
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    int rc = VINF_SUCCESS;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSIIOREQINT pVScsiIoReq = NULL;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p enmTxDir=%u uOffset=%llu cbTransfer=%u\n",
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync                 pVScsiLun, pVScsiReq, enmTxDir, uOffset, cbTransfer));
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiIoReq = (PVSCSIIOREQINT)RTMemAllocZ(sizeof(VSCSIIOREQINT));
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    if (!pVScsiIoReq)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync        return VERR_NO_MEMORY;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->pVScsiReq       = pVScsiReq;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->pVScsiLun       = pVScsiLun;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->enmTxDir        = enmTxDir;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->u.Io.uOffset    = uOffset;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->u.Io.cbTransfer = cbTransfer;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->u.Io.paSeg      = pVScsiReq->SgBuf.paSegs;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->u.Io.cSeg       = pVScsiReq->SgBuf.cSegs;
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
65697a26b524640b83828b715160c798c43a0424vboxsync    if (RT_FAILURE(rc))
65697a26b524640b83828b715160c798c43a0424vboxsync    {
65697a26b524640b83828b715160c798c43a0424vboxsync        ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
65697a26b524640b83828b715160c798c43a0424vboxsync        RTMemFree(pVScsiIoReq);
65697a26b524640b83828b715160c798c43a0424vboxsync    }
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    return rc;
65697a26b524640b83828b715160c798c43a0424vboxsync}
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsyncint vscsiIoReqUnmapEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
f4aad55f8addd816ef005845842a2418bbdc3ea2vboxsync                           PRTRANGE paRanges, unsigned cRanges)
65697a26b524640b83828b715160c798c43a0424vboxsync{
65697a26b524640b83828b715160c798c43a0424vboxsync    int rc = VINF_SUCCESS;
65697a26b524640b83828b715160c798c43a0424vboxsync    PVSCSIIOREQINT pVScsiIoReq = NULL;
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p paRanges=%#p cRanges=%u\n",
65697a26b524640b83828b715160c798c43a0424vboxsync                 pVScsiLun, pVScsiReq, paRanges, cRanges));
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq = (PVSCSIIOREQINT)RTMemAllocZ(sizeof(VSCSIIOREQINT));
65697a26b524640b83828b715160c798c43a0424vboxsync    if (!pVScsiIoReq)
65697a26b524640b83828b715160c798c43a0424vboxsync        return VERR_NO_MEMORY;
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->pVScsiReq        = pVScsiReq;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->pVScsiLun        = pVScsiLun;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->enmTxDir         = VSCSIIOREQTXDIR_UNMAP;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->u.Unmap.paRanges = paRanges;
65697a26b524640b83828b715160c798c43a0424vboxsync    pVScsiIoReq->u.Unmap.cRanges  = cRanges;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    if (RT_FAILURE(rc))
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    {
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync        ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync        RTMemFree(pVScsiIoReq);
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    }
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    return rc;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync}
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsyncuint32_t vscsiIoReqOutstandingCountGet(PVSCSILUNINT pVScsiLun)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync{
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    return ASMAtomicReadU32(&pVScsiLun->IoReq.cReqOutstanding);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync}
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsyncVBOXDDU_DECL(int) VSCSIIoReqCompleted(VSCSIIOREQ hVScsiIoReq, int rcIoReq, bool fRedoPossible)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync{
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSILUNINT pVScsiLun;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSIREQINT pVScsiReq;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    int rcReq = SCSI_STATUS_OK;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync    LogFlowFunc(("hVScsiIoReq=%#p rcIoReq=%Rrc\n", hVScsiIoReq, rcIoReq));
0dd6dfbebcda0af90da4413aaea5f3b9d1817556vboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiLun = pVScsiIoReq->pVScsiLun;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    pVScsiReq = pVScsiIoReq->pVScsiReq;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    AssertMsg(pVScsiLun->IoReq.cReqOutstanding > 0,
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync              ("Unregistered I/O request completed\n"));
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    if (RT_SUCCESS(rcIoReq))
97fd7338a708a1cdb63fbdf823f6e508dc0d914dvboxsync        rcReq = vscsiLunReqSenseOkSet(pVScsiLun, pVScsiReq);
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync    else if (!fRedoPossible)
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync    {
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync        /** @todo Not 100% correct for the write case as the 0x00 ASCQ for write errors
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync         * is not used for SBC devices. */
97fd7338a708a1cdb63fbdf823f6e508dc0d914dvboxsync        rcReq = vscsiLunReqSenseErrorSet(pVScsiLun, pVScsiReq, SCSI_SENSE_MEDIUM_ERROR,
97fd7338a708a1cdb63fbdf823f6e508dc0d914dvboxsync                                         pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_READ
97fd7338a708a1cdb63fbdf823f6e508dc0d914dvboxsync                                         ? SCSI_ASC_READ_ERROR
65697a26b524640b83828b715160c798c43a0424vboxsync                                         : SCSI_ASC_WRITE_ERROR,
65697a26b524640b83828b715160c798c43a0424vboxsync                                         0x00);
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync    }
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync    else
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync        rcReq = SCSI_STATUS_CHECK_CONDITION;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    if (pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_UNMAP)
65697a26b524640b83828b715160c798c43a0424vboxsync        RTMemFree(pVScsiIoReq->u.Unmap.paRanges);
65697a26b524640b83828b715160c798c43a0424vboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    /* Free the I/O request */
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    RTMemFree(pVScsiIoReq);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    /* Notify completion of the SCSI request. */
96a7e06717e2d7398642eadb5ebab1bf13fbe2dbvboxsync    vscsiDeviceReqComplete(pVScsiLun->pVScsiDevice, pVScsiReq, rcReq, fRedoPossible, rcIoReq);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    return VINF_SUCCESS;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync}
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsyncVBOXDDU_DECL(VSCSIIOREQTXDIR) VSCSIIoReqTxDirGet(VSCSIIOREQ hVScsiIoReq)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync{
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    AssertPtrReturn(pVScsiIoReq, VSCSIIOREQTXDIR_INVALID);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    return pVScsiIoReq->enmTxDir;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync}
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsyncVBOXDDU_DECL(int) VSCSIIoReqParamsGet(VSCSIIOREQ hVScsiIoReq, uint64_t *puOffset,
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync                                      size_t *pcbTransfer, unsigned *pcSeg,
a9f41cb889f53e8407561a6155052c441eb0fc5fvboxsync                                      size_t *pcbSeg, PCRTSGSEG *ppaSeg)
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync{
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
65697a26b524640b83828b715160c798c43a0424vboxsync    AssertReturn(   pVScsiIoReq->enmTxDir != VSCSIIOREQTXDIR_FLUSH
65697a26b524640b83828b715160c798c43a0424vboxsync                 && pVScsiIoReq->enmTxDir != VSCSIIOREQTXDIR_UNMAP,
65697a26b524640b83828b715160c798c43a0424vboxsync                 VERR_NOT_SUPPORTED);
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    *puOffset    = pVScsiIoReq->u.Io.uOffset;
65697a26b524640b83828b715160c798c43a0424vboxsync    *pcbTransfer = pVScsiIoReq->u.Io.cbTransfer;
65697a26b524640b83828b715160c798c43a0424vboxsync    *pcSeg       = pVScsiIoReq->u.Io.cSeg;
65697a26b524640b83828b715160c798c43a0424vboxsync    *pcbSeg      = pVScsiIoReq->u.Io.cbSeg;
65697a26b524640b83828b715160c798c43a0424vboxsync    *ppaSeg      = pVScsiIoReq->u.Io.paSeg;
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    return VINF_SUCCESS;
65697a26b524640b83828b715160c798c43a0424vboxsync}
65697a26b524640b83828b715160c798c43a0424vboxsync
f4aad55f8addd816ef005845842a2418bbdc3ea2vboxsyncVBOXDDU_DECL(int) VSCSIIoReqUnmapParamsGet(VSCSIIOREQ hVScsiIoReq, PCRTRANGE *ppaRanges,
65697a26b524640b83828b715160c798c43a0424vboxsync                                           unsigned *pcRanges)
65697a26b524640b83828b715160c798c43a0424vboxsync{
65697a26b524640b83828b715160c798c43a0424vboxsync    PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
65697a26b524640b83828b715160c798c43a0424vboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
65697a26b524640b83828b715160c798c43a0424vboxsync    AssertReturn(pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_UNMAP, VERR_NOT_SUPPORTED);
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
65697a26b524640b83828b715160c798c43a0424vboxsync    *ppaRanges = pVScsiIoReq->u.Unmap.paRanges;
65697a26b524640b83828b715160c798c43a0424vboxsync    *pcRanges  = pVScsiIoReq->u.Unmap.cRanges;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync    return VINF_SUCCESS;
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync}
a4ba1fc5788b1fb4c078587d5f55936e1b83098dvboxsync