| 1 | /* $Id: VSCSIIoReq.cpp 56292 2015-06-09 14:20:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Virtual SCSI driver: I/O request handling.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2015 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 | #define LOG_GROUP LOG_GROUP_VSCSI
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| 18 | #include <VBox/log.h>
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| 19 | #include <VBox/err.h>
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| 20 | #include <VBox/types.h>
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| 21 | #include <VBox/vscsi.h>
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| 22 | #include <iprt/assert.h>
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| 23 | #include <iprt/mem.h>
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| 24 | #include <iprt/asm.h>
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| 25 |
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| 26 | #include "VSCSIInternal.h"
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| 27 |
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| 28 | int vscsiIoReqFlushEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq)
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| 29 | {
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| 30 | int rc = VINF_SUCCESS;
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| 31 | PVSCSIIOREQINT pVScsiIoReq = NULL;
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| 32 |
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| 33 | pVScsiIoReq = (PVSCSIIOREQINT)RTMemAllocZ(sizeof(VSCSIIOREQINT));
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| 34 | if (!pVScsiIoReq)
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| 35 | return VERR_NO_MEMORY;
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| 36 |
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| 37 | pVScsiIoReq->pVScsiReq = pVScsiReq;
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| 38 | pVScsiIoReq->pVScsiLun = pVScsiLun;
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| 39 | pVScsiIoReq->enmTxDir = VSCSIIOREQTXDIR_FLUSH;
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| 40 |
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| 41 | ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 42 |
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| 43 | rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
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| 44 | if (RT_FAILURE(rc))
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| 45 | {
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| 46 | ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 47 | RTMemFree(pVScsiIoReq);
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| 48 | }
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| 49 |
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| 50 | return rc;
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| 51 | }
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| 52 |
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| 53 |
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| 54 | int vscsiIoReqTransferEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
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| 55 | VSCSIIOREQTXDIR enmTxDir, uint64_t uOffset,
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| 56 | size_t cbTransfer)
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| 57 | {
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| 58 | int rc = VINF_SUCCESS;
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| 59 | PVSCSIIOREQINT pVScsiIoReq = NULL;
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| 60 |
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| 61 | LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p enmTxDir=%u uOffset=%llu cbTransfer=%u\n",
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| 62 | pVScsiLun, pVScsiReq, enmTxDir, uOffset, cbTransfer));
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| 63 |
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| 64 | pVScsiIoReq = (PVSCSIIOREQINT)RTMemAllocZ(sizeof(VSCSIIOREQINT));
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| 65 | if (!pVScsiIoReq)
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| 66 | return VERR_NO_MEMORY;
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| 67 |
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| 68 | pVScsiIoReq->pVScsiReq = pVScsiReq;
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| 69 | pVScsiIoReq->pVScsiLun = pVScsiLun;
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| 70 | pVScsiIoReq->enmTxDir = enmTxDir;
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| 71 | pVScsiIoReq->u.Io.uOffset = uOffset;
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| 72 | pVScsiIoReq->u.Io.cbTransfer = cbTransfer;
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| 73 | pVScsiIoReq->u.Io.paSeg = pVScsiReq->SgBuf.paSegs;
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| 74 | pVScsiIoReq->u.Io.cSeg = pVScsiReq->SgBuf.cSegs;
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| 75 |
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| 76 | ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 77 |
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| 78 | rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
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| 79 | if (RT_FAILURE(rc))
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| 80 | {
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| 81 | ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 82 | RTMemFree(pVScsiIoReq);
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| 83 | }
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| 84 |
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| 85 | return rc;
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| 86 | }
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| 87 |
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| 88 |
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| 89 | int vscsiIoReqUnmapEnqueue(PVSCSILUNINT pVScsiLun, PVSCSIREQINT pVScsiReq,
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| 90 | PRTRANGE paRanges, unsigned cRanges)
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| 91 | {
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| 92 | int rc = VINF_SUCCESS;
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| 93 | PVSCSIIOREQINT pVScsiIoReq = NULL;
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| 94 |
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| 95 | LogFlowFunc(("pVScsiLun=%#p pVScsiReq=%#p paRanges=%#p cRanges=%u\n",
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| 96 | pVScsiLun, pVScsiReq, paRanges, cRanges));
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| 97 |
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| 98 | pVScsiIoReq = (PVSCSIIOREQINT)RTMemAllocZ(sizeof(VSCSIIOREQINT));
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| 99 | if (!pVScsiIoReq)
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| 100 | return VERR_NO_MEMORY;
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| 101 |
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| 102 | pVScsiIoReq->pVScsiReq = pVScsiReq;
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| 103 | pVScsiIoReq->pVScsiLun = pVScsiLun;
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| 104 | pVScsiIoReq->enmTxDir = VSCSIIOREQTXDIR_UNMAP;
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| 105 | pVScsiIoReq->u.Unmap.paRanges = paRanges;
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| 106 | pVScsiIoReq->u.Unmap.cRanges = cRanges;
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| 107 |
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| 108 | ASMAtomicIncU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 109 |
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| 110 | rc = vscsiLunReqTransferEnqueue(pVScsiLun, pVScsiIoReq);
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| 111 | if (RT_FAILURE(rc))
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| 112 | {
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| 113 | ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 114 | RTMemFree(pVScsiIoReq);
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| 115 | }
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| 116 |
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| 117 | return rc;
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| 118 | }
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| 119 |
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| 120 |
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| 121 | uint32_t vscsiIoReqOutstandingCountGet(PVSCSILUNINT pVScsiLun)
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| 122 | {
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| 123 | return ASMAtomicReadU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 124 | }
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| 125 |
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| 126 |
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| 127 | VBOXDDU_DECL(int) VSCSIIoReqCompleted(VSCSIIOREQ hVScsiIoReq, int rcIoReq, bool fRedoPossible)
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| 128 | {
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| 129 | PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
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| 130 | PVSCSILUNINT pVScsiLun;
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| 131 | PVSCSIREQINT pVScsiReq;
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| 132 | int rcReq = SCSI_STATUS_OK;
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| 133 |
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| 134 | AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
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| 135 |
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| 136 | LogFlowFunc(("hVScsiIoReq=%#p rcIoReq=%Rrc\n", hVScsiIoReq, rcIoReq));
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| 137 |
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| 138 | pVScsiLun = pVScsiIoReq->pVScsiLun;
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| 139 | pVScsiReq = pVScsiIoReq->pVScsiReq;
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| 140 |
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| 141 | AssertMsg(pVScsiLun->IoReq.cReqOutstanding > 0,
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| 142 | ("Unregistered I/O request completed\n"));
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| 143 |
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| 144 | ASMAtomicDecU32(&pVScsiLun->IoReq.cReqOutstanding);
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| 145 |
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| 146 | if (RT_SUCCESS(rcIoReq))
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| 147 | rcReq = vscsiLunReqSenseOkSet(pVScsiLun, pVScsiReq);
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| 148 | else if (!fRedoPossible)
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| 149 | {
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| 150 | /** @todo Not 100% correct for the write case as the 0x00 ASCQ for write errors
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| 151 | * is not used for SBC devices. */
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| 152 | rcReq = vscsiLunReqSenseErrorSet(pVScsiLun, pVScsiReq, SCSI_SENSE_MEDIUM_ERROR,
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| 153 | pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_READ
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| 154 | ? SCSI_ASC_READ_ERROR
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| 155 | : SCSI_ASC_WRITE_ERROR,
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| 156 | 0x00);
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| 157 | }
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| 158 | else
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| 159 | rcReq = SCSI_STATUS_CHECK_CONDITION;
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| 160 |
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| 161 | if (pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_UNMAP)
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| 162 | RTMemFree(pVScsiIoReq->u.Unmap.paRanges);
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| 163 |
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| 164 | /* Free the I/O request */
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| 165 | RTMemFree(pVScsiIoReq);
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| 166 |
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| 167 | /* Notify completion of the SCSI request. */
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| 168 | vscsiDeviceReqComplete(pVScsiLun->pVScsiDevice, pVScsiReq, rcReq, fRedoPossible, rcIoReq);
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| 169 |
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| 170 | return VINF_SUCCESS;
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| 171 | }
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| 172 |
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| 173 |
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| 174 | VBOXDDU_DECL(VSCSIIOREQTXDIR) VSCSIIoReqTxDirGet(VSCSIIOREQ hVScsiIoReq)
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| 175 | {
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| 176 | PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
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| 177 |
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| 178 | AssertPtrReturn(pVScsiIoReq, VSCSIIOREQTXDIR_INVALID);
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| 179 |
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| 180 | return pVScsiIoReq->enmTxDir;
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| 181 | }
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| 182 |
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| 183 |
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| 184 | VBOXDDU_DECL(int) VSCSIIoReqParamsGet(VSCSIIOREQ hVScsiIoReq, uint64_t *puOffset,
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| 185 | size_t *pcbTransfer, unsigned *pcSeg,
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| 186 | size_t *pcbSeg, PCRTSGSEG *ppaSeg)
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| 187 | {
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| 188 | PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
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| 189 |
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| 190 | AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
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| 191 | AssertReturn( pVScsiIoReq->enmTxDir != VSCSIIOREQTXDIR_FLUSH
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| 192 | && pVScsiIoReq->enmTxDir != VSCSIIOREQTXDIR_UNMAP,
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| 193 | VERR_NOT_SUPPORTED);
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| 194 |
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| 195 | *puOffset = pVScsiIoReq->u.Io.uOffset;
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| 196 | *pcbTransfer = pVScsiIoReq->u.Io.cbTransfer;
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| 197 | *pcSeg = pVScsiIoReq->u.Io.cSeg;
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| 198 | *pcbSeg = pVScsiIoReq->u.Io.cbSeg;
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| 199 | *ppaSeg = pVScsiIoReq->u.Io.paSeg;
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| 200 |
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| 201 | return VINF_SUCCESS;
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| 202 | }
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| 203 |
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| 204 | VBOXDDU_DECL(int) VSCSIIoReqUnmapParamsGet(VSCSIIOREQ hVScsiIoReq, PCRTRANGE *ppaRanges,
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| 205 | unsigned *pcRanges)
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| 206 | {
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| 207 | PVSCSIIOREQINT pVScsiIoReq = hVScsiIoReq;
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| 208 |
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| 209 | AssertPtrReturn(pVScsiIoReq, VERR_INVALID_HANDLE);
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| 210 | AssertReturn(pVScsiIoReq->enmTxDir == VSCSIIOREQTXDIR_UNMAP, VERR_NOT_SUPPORTED);
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| 211 |
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| 212 | *ppaRanges = pVScsiIoReq->u.Unmap.paRanges;
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| 213 | *pcRanges = pVScsiIoReq->u.Unmap.cRanges;
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| 214 |
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| 215 | return VINF_SUCCESS;
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| 216 | }
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| 217 |
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