| 1 | /* $Id: VSCSILun.cpp 38844 2011-09-23 12:25:21Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Virtual SCSI driver: LUN handling
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2010 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 |
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| 25 | #include "VSCSIInternal.h"
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| 26 |
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| 27 | /** SBC descriptor */
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| 28 | extern VSCSILUNDESC g_VScsiLunTypeSbc;
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| 29 | /** MMC descriptor */
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| 30 | extern VSCSILUNDESC g_VScsiLunTypeMmc;
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| 31 |
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| 32 | /**
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| 33 | * Array of supported SCSI LUN types.
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| 34 | */
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| 35 | static PVSCSILUNDESC g_aVScsiLunTypesSupported[] =
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| 36 | {
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| 37 | &g_VScsiLunTypeSbc,
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| 38 | &g_VScsiLunTypeMmc,
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| 39 | };
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| 40 |
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| 41 | VBOXDDU_DECL(int) VSCSILunCreate(PVSCSILUN phVScsiLun, VSCSILUNTYPE enmLunType,
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| 42 | PVSCSILUNIOCALLBACKS pVScsiLunIoCallbacks,
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| 43 | void *pvVScsiLunUser)
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| 44 | {
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| 45 | PVSCSILUNINT pVScsiLun = NULL;
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| 46 | PVSCSILUNDESC pVScsiLunDesc = NULL;
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| 47 |
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| 48 | AssertPtrReturn(phVScsiLun, VERR_INVALID_POINTER);
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| 49 | AssertReturn( enmLunType > VSCSILUNTYPE_INVALID
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| 50 | && enmLunType < VSCSILUNTYPE_LAST, VERR_INVALID_PARAMETER);
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| 51 | AssertPtrReturn(pVScsiLunIoCallbacks, VERR_INVALID_PARAMETER);
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| 52 |
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| 53 | for (unsigned idxLunType = 0; idxLunType < RT_ELEMENTS(g_aVScsiLunTypesSupported); idxLunType++)
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| 54 | {
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| 55 | if (g_aVScsiLunTypesSupported[idxLunType]->enmLunType == enmLunType)
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| 56 | {
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| 57 | pVScsiLunDesc = g_aVScsiLunTypesSupported[idxLunType];
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| 58 | break;
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| 59 | }
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| 60 | }
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| 61 |
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| 62 | if (!pVScsiLunDesc)
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| 63 | return VERR_VSCSI_LUN_TYPE_NOT_SUPPORTED;
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| 64 |
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| 65 | pVScsiLun = (PVSCSILUNINT)RTMemAllocZ(pVScsiLunDesc->cbLun);
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| 66 | if (!pVScsiLun)
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| 67 | return VERR_NO_MEMORY;
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| 68 |
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| 69 | pVScsiLun->pVScsiDevice = NULL;
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| 70 | pVScsiLun->pvVScsiLunUser = pvVScsiLunUser;
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| 71 | pVScsiLun->pVScsiLunIoCallbacks = pVScsiLunIoCallbacks;
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| 72 | pVScsiLun->pVScsiLunDesc = pVScsiLunDesc;
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| 73 |
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| 74 | int rc = vscsiLunGetFeatureFlags(pVScsiLun, &pVScsiLun->fFeatures);
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| 75 | if (RT_SUCCESS(rc))
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| 76 | {
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| 77 | rc = pVScsiLunDesc->pfnVScsiLunInit(pVScsiLun);
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| 78 | if (RT_SUCCESS(rc))
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| 79 | {
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| 80 | *phVScsiLun = pVScsiLun;
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| 81 | return VINF_SUCCESS;
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| 82 | }
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| 83 | }
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| 84 |
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| 85 | RTMemFree(pVScsiLun);
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| 86 |
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| 87 | return rc;
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| 88 | }
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| 89 |
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| 90 | /**
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| 91 | * Destroy virtual SCSI LUN.
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| 92 | *
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| 93 | * @returns VBox status code.
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| 94 | * @param hVScsiLun The virtual SCSI LUN handle to destroy.
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| 95 | */
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| 96 | VBOXDDU_DECL(int) VSCSILunDestroy(VSCSILUN hVScsiLun)
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| 97 | {
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| 98 | PVSCSILUNINT pVScsiLun = (PVSCSILUNINT)hVScsiLun;
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| 99 |
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| 100 | AssertPtrReturn(pVScsiLun, VERR_INVALID_HANDLE);
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| 101 | AssertReturn(!pVScsiLun->pVScsiDevice, VERR_VSCSI_LUN_ATTACHED_TO_DEVICE);
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| 102 | AssertReturn(vscsiIoReqOutstandingCountGet(pVScsiLun) == 0, VERR_VSCSI_LUN_BUSY);
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| 103 |
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| 104 | int rc = pVScsiLun->pVScsiLunDesc->pfnVScsiLunDestroy(pVScsiLun);
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| 105 | if (RT_FAILURE(rc))
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| 106 | return rc;
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| 107 |
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| 108 | /* Make LUN invalid */
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| 109 | pVScsiLun->pvVScsiLunUser = NULL;
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| 110 | pVScsiLun->pVScsiLunIoCallbacks = NULL;
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| 111 | pVScsiLun->pVScsiLunDesc = NULL;
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| 112 |
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| 113 | RTMemFree(pVScsiLun);
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| 114 |
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| 115 | return VINF_SUCCESS;
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| 116 | }
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| 117 |
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