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/* $Id: VSCSIIoReq.cpp $ */
/** @file
* Virtual SCSI driver: I/O request handling.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#define LOG_GROUP LOG_GROUP_VSCSI
#include <VBox/log.h>
#include <iprt/errcore.h>
#include <VBox/types.h>
#include <VBox/vscsi.h>
#include <iprt/assert.h>
#include <iprt/mem.h>
#include <iprt/asm.h>
#include "VSCSIInternal.h"
int vscsiIoReqInit(PVSCSILUNINT pVScsiLun)
{
return vscsiLunReqAllocSizeSet(pVScsiLun, sizeof(VSCSIIOREQINT));
}
int vscsiIoReqFlushEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq)
{
int rc = VINF_SUCCESS;
PVSCSIIOREQINT pVScsiIoReq = NULL;
rc = vscsiLunReqAlloc(pVScsiLun, (uintptr_t)pVScsiReq, &pVScsiIoReq);
if (RT_SUCCESS(rc))
{
pVScsiIoReq->pVScsiReq = pVScsiReq;
pVScsiIoReq->pVScsiLun = pVScsiLun;
pVScsiIoReq->enmTxDir = VSCSIIOREQTXDIR_FLUSH;
ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
if (RT_FAILURE(rc))
{
ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
vscsiLunReqFree(pVScsiLun, pVScsiIoReq);
}
}
return rc;
}
int vscsiIoReqTransferEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
VSCSIIOREQTXDIR enmTxDir, uint64_t uOffset,
size_t cbTransfer)
{
int rc = VINF_SUCCESS;
PVSCSIIOREQINT pVScsiIoReq = NULL;
LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p enmTxDir=%u uOffset=%llu cbTransfer=%u\n",
pVScsiLun, pVScsiReq, enmTxDir, uOffset, cbTransfer));
rc = vscsiLunReqAlloc(pVScsiLun, (uintptr_t)pVScsiReq, &pVScsiIoReq);
if (RT_SUCCESS(rc))
{
pVScsiIoReq->pVScsiReq = pVScsiReq;
pVScsiIoReq->pVScsiLun = pVScsiLun;
pVScsiIoReq->enmTxDir = enmTxDir;
pVScsiIoReq->u.Io.uOffset = uOffset;
pVScsiIoReq->u.Io.cbTransfer = cbTransfer;
pVScsiIoReq->u.Io.paSeg = pVScsiReq->SgBuf.paSegs;
pVScsiIoReq->u.Io.cSeg = pVScsiReq->SgBuf.cSegs;
ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
if (RT_FAILURE(rc))
{
ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
vscsiLunReqFree(pVScsiLun, pVScsiIoReq);
}
}
return rc;
}
int vscsiIoReqTransferEnqueueEx(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
VSCSIIOREQTXDIR enmTxDir, uint64_t uOffset,
PCRTSGSEG paSegs, unsigned cSegs, size_t cbTransfer)
{
int rc = VINF_SUCCESS;
PVSCSIIOREQINT pVScsiIoReq = NULL;
LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p enmTxDir=%u uOffset=%llu cbTransfer=%u\n",
pVScsiLun, pVScsiReq, enmTxDir, uOffset, cbTransfer));
rc = vscsiLunReqAlloc(pVScsiLun, (uintptr_t)pVScsiReq, &pVScsiIoReq);
if (RT_SUCCESS(rc))
{
pVScsiIoReq->pVScsiReq = pVScsiReq;
pVScsiIoReq->pVScsiLun = pVScsiLun;
pVScsiIoReq->enmTxDir = enmTxDir;
pVScsiIoReq->u.Io.uOffset = uOffset;
pVScsiIoReq->u.Io.cbTransfer = cbTransfer;
pVScsiIoReq->u.Io.paSeg = paSegs;
pVScsiIoReq->u.Io.cSeg = cSegs;
ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
if (RT_FAILURE(rc))
{
ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
vscsiLunReqFree(pVScsiLun, pVScsiIoReq);
}
}
return rc;
}
int vscsiIoReqUnmapEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
PRTRANGE paRanges, unsigned cRanges)
{
int rc = VINF_SUCCESS;
PVSCSIIOREQINT pVScsiIoReq = NULL;
LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p paRanges=%#p cRanges=%u\n",
pVScsiLun, pVScsiReq, paRanges, cRanges));
rc = vscsiLunReqAlloc(pVScsiLun, (uintptr_t)pVScsiReq, &pVScsiIoReq);
if (RT_SUCCESS(rc))
{
pVScsiIoReq->pVScsiReq = pVScsiReq;
pVScsiIoReq->pVScsiLun = pVScsiLun;
pVScsiIoReq->enmTxDir = VSCSIIOREQTXDIR_UNMAP;
pVScsiIoReq->u.Unmap.paRanges = paRanges;
pVScsiIoReq->u.Unmap.cRanges = cRanges;
ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
if (RT_FAILURE(rc))
{
ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
vscsiLunReqFree(pVScsiLun, pVScsiIoReq);
}
}
return rc;
}
uint32_t vscsiIoReqOutstandingCountGet(PVSCSILUNINT pVScsiLun)
{
return ASMAtomicReadU32(&pVScsiLun->IoReq.cReqOutstanding);
}
VBOXDDU_DECL(int) VSCSIIoReqCompleted(VSCSIIOREQ hVScsiIoReq, int rcIoReq, bool fRedoPossible)
{
PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
PVSCSILUNINT pVScsiLun;
PVSCSIREQINT pVScsiReq;
int rcReq = SCSI_STATUS_OK;
AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
LogFlowFunc(("hVScsiIoReq=%#p rcIoReq=%Rrc\n", hVScsiIoReq, rcIoReq));
pVScsiLun = pVScsiIoReq->pVScsiLun;
pVScsiReq = pVScsiIoReq->pVScsiReq;
AssertMsg(pVScsiLun->IoReq.cReqOutstanding > 0,
("Unregistered I/O request completed\n"));
ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
if (RT_SUCCESS(rcIoReq))
rcReq = vscsiLunReqSenseOkSet(pVScsiLun, pVScsiReq);
else if (!fRedoPossible)
{
/** @todo Not 100% correct for the write case as the 0x00 ASCQ for write errors
* is not used for SBC devices. */
rcReq = vscsiLunReqSenseErrorSet(pVScsiLun, pVScsiReq, SCSI_SENSE_MEDIUM_ERROR,
pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_READ
? SCSI_ASC_READ_ERROR
: SCSI_ASC_WRITE_ERROR,
0x00);
}
else
rcReq = SCSI_STATUS_CHECK_CONDITION;
if (pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_UNMAP)
RTMemFree(pVScsiIoReq->u.Unmap.paRanges);
/* Free the I/O request */
vscsiLunReqFree(pVScsiLun, pVScsiIoReq);
/* Notify completion of the SCSI request. */
vscsiDeviceReqComplete(pVScsiLun->pVScsiDevice, pVScsiReq, rcReq, fRedoPossible, rcIoReq);
return VINF_SUCCESS;
}
VBOXDDU_DECL(VSCSIIOREQTXDIR) VSCSIIoReqTxDirGet(VSCSIIOREQ hVScsiIoReq)
{
PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
AssertPtrReturn(pVScsiIoReq, VSCSIIOREQTXDIR_INVALID);
return pVScsiIoReq->enmTxDir;
}
VBOXDDU_DECL(int) VSCSIIoReqParamsGet(VSCSIIOREQ hVScsiIoReq, uint64_t *puOffset,
size_t *pcbTransfer, unsigned *pcSeg,
size_t *pcbSeg, PCRTSGSEG *ppaSeg)
{
PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
AssertReturn( pVScsiIoReq->enmTxDir != VSCSIIOREQTXDIR_FLUSH
&& pVScsiIoReq->enmTxDir != VSCSIIOREQTXDIR_UNMAP,
VERR_NOT_SUPPORTED);
*puOffset = pVScsiIoReq->u.Io.uOffset;
*pcbTransfer = pVScsiIoReq->u.Io.cbTransfer;
*pcSeg = pVScsiIoReq->u.Io.cSeg;
*pcbSeg = pVScsiIoReq->u.Io.cbSeg;
*ppaSeg = pVScsiIoReq->u.Io.paSeg;
return VINF_SUCCESS;
}
VBOXDDU_DECL(int) VSCSIIoReqUnmapParamsGet(VSCSIIOREQ hVScsiIoReq, PCRTRANGE *ppaRanges,
unsigned *pcRanges)
{
PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
AssertReturn(pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_UNMAP, VERR_NOT_SUPPORTED);
*ppaRanges = pVScsiIoReq->u.Unmap.paRanges;
*pcRanges = pVScsiIoReq->u.Unmap.cRanges;
return VINF_SUCCESS;
}
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