/* $Id: vscsi.h 69107 2017-10-17 10:53:48Z vboxsync $ */ /** @file * VBox storage drivers - Virtual SCSI driver */ /* * Copyright (C) 2006-2017 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. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #ifndef ___VBox_vscsi_h #define ___VBox_vscsi_h #include #include #include #include RT_C_DECLS_BEGIN #ifdef IN_RING0 # error "There are no VBox VSCSI APIs available in Ring-0 Host Context!" #endif /** @defgroup grp_drv_vscsi Virtual VSCSI Driver * @ingroup grp_devdrv * @{ */ /** @todo figure better grouping. */ /** A virtual SCSI device handle */ typedef struct VSCSIDEVICEINT *VSCSIDEVICE; /** A pointer to a virtual SCSI device handle. */ typedef VSCSIDEVICE *PVSCSIDEVICE; /** A virtual SCSI LUN handle. */ typedef struct VSCSILUNINT *VSCSILUN; /** A pointer to a virtual SCSI LUN handle. */ typedef VSCSILUN *PVSCSILUN; /** A virtual SCSI request handle. */ typedef struct VSCSIREQINT *VSCSIREQ; /** A pointer to a virtual SCSI request handle. */ typedef VSCSIREQ *PVSCSIREQ; /** A SCSI I/O request handle. */ typedef struct VSCSIIOREQINT *VSCSIIOREQ; /** A pointer to a SCSI I/O request handle. */ typedef VSCSIIOREQ *PVSCSIIOREQ; /** * Virtual SCSI I/O request transfer direction. */ typedef enum VSCSIIOREQTXDIR { /** Invalid direction */ VSCSIIOREQTXDIR_INVALID = 0, /** Read */ VSCSIIOREQTXDIR_READ, /** Write */ VSCSIIOREQTXDIR_WRITE, /** Flush */ VSCSIIOREQTXDIR_FLUSH, /** Unmap */ VSCSIIOREQTXDIR_UNMAP, /** 32bit hack */ VSCSIIOREQTXDIR_32BIT_HACK = 0x7fffffff } VSCSIIOREQTXDIR; /** Pointer to a SCSI LUN type */ typedef VSCSIIOREQTXDIR *PVSCSIIOREQTXDIR; /** * LUN types we support */ typedef enum VSCSILUNTYPE { /** Invalid type */ VSCSILUNTYPE_INVALID = 0, /** Hard disk (SBC) */ VSCSILUNTYPE_SBC, /** CD/DVD drive (MMC) */ VSCSILUNTYPE_MMC, /** Tape drive (SSC) */ VSCSILUNTYPE_SSC, /** Last value to indicate an invalid device */ VSCSILUNTYPE_LAST, /** 32bit hack */ VSCSILUNTYPE_32BIT_HACK = 0x7fffffff } VSCSILUNTYPE; /** Pointer to a SCSI LUN type */ typedef VSCSILUNTYPE *PVSCSILUNTYPE; /** The LUN can handle the UNMAP command. */ #define VSCSI_LUN_FEATURE_UNMAP RT_BIT(0) /** The LUN has a non rotational medium. */ #define VSCSI_LUN_FEATURE_NON_ROTATIONAL RT_BIT(1) /** The medium of the LUN is readonly. */ #define VSCSI_LUN_FEATURE_READONLY RT_BIT(2) /** * Virtual SCSI LUN I/O Callback table. */ typedef struct VSCSILUNIOCALLBACKS { /** * Sets the size of the allocator specific memory for a I/O request. * * @returns VBox status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param cbVScsiIoReqAlloc The size of the allocator specific memory in bytes. * @thread EMT. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunReqAllocSizeSet, (VSCSILUN hVScsiLun, void *pvScsiLunUser, size_t cbVScsiIoReqAlloc)); /** * Allocates a new I/O request. * * @returns VBox status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param u64Tag A tag to assign to the request handle for identification later on. * @param phVScsiIoReq Where to store the handle to the allocated I/O request on success. * @thread Any thread. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunReqAlloc, (VSCSILUN hVScsiLun, void *pvScsiLunUser, uint64_t u64Tag, PVSCSIIOREQ phVScsiIoReq)); /** * Frees a given I/O request. * * @returns VBox status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param hVScsiIoReq The VSCSI I/O request to free. * @thread Any thread. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunReqFree, (VSCSILUN hVScsiLun, void *pvScsiLunUser, VSCSIIOREQ hVScsiIoReq)); /** * Returns the number of regions for the medium. * * @returns Number of regions. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. */ DECLR3CALLBACKMEMBER(uint32_t, pfnVScsiLunMediumGetRegionCount,(VSCSILUN hVScsiLun, void *pvScsiLunUser)); /** * Queries the properties for the given region. * * @returns VBox status code. * @retval VERR_NOT_FOUND if the region index is not known. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param uRegion The region index to query the properties of. * @param pu64LbaStart Where to store the starting LBA for the region on success. * @param pcBlocks Where to store the number of blocks for the region on success. * @param pcbBlock Where to store the size of one block in bytes on success. * @param penmDataForm WHere to store the data form for the region on success. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunMediumQueryRegionProperties,(VSCSILUN hVScsiLun, void *pvScsiLunUser, uint32_t uRegion, uint64_t *pu64LbaStart, uint64_t *pcBlocks, uint64_t *pcbBlock, PVDREGIONDATAFORM penmDataForm)); /** * Queries the properties for the region covering the given LBA. * * @returns VBox status code. * @retval VERR_NOT_FOUND if the region index is not known. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param u64LbaStart Where to store the starting LBA for the region on success. * @param puRegion Where to store the region number on success. * @param pcBlocks Where to store the number of blocks left in this region starting from the given LBA. * @param pcbBlock Where to store the size of one block in bytes on success. * @param penmDataForm WHere to store the data form for the region on success. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunMediumQueryRegionPropertiesForLba,(VSCSILUN hVScsiLun, void *pvScsiLunUser, uint64_t u64LbaStart, uint32_t *puRegion, uint64_t *pcBlocks, uint64_t *pcbBlock, PVDREGIONDATAFORM penmDataForm)); /** * Set the lock state of the underlying medium. * * @returns VBox status status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param fLocked New lock state (locked/unlocked). */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunMediumSetLock,(VSCSILUN hVScsiLun, void *pvScsiLunUser, bool fLocked)); /** * Eject the attached medium. * * @returns VBox status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunMediumEject, (VSCSILUN hVScsiLun, void *pvScsiLunUser)); /** * Enqueue a read or write request from the medium. * * @returns VBox status status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param hVScsiIoReq Virtual SCSI I/O request handle. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunReqTransferEnqueue,(VSCSILUN hVScsiLun, void *pvScsiLunUser, VSCSIIOREQ hVScsiIoReq)); /** * Returns flags of supported features. * * @returns VBox status status code. * @param hVScsiLun Virtual SCSI LUN handle. * @param pvScsiLunUser Opaque user data which may be used to identify the * medium. * @param pfFeatures Where to return the queried features. */ DECLR3CALLBACKMEMBER(int, pfnVScsiLunGetFeatureFlags,(VSCSILUN hVScsiLun, void *pvScsiLunUser, uint64_t *pfFeatures)); } VSCSILUNIOCALLBACKS; /** Pointer to a virtual SCSI LUN I/O callback table. */ typedef VSCSILUNIOCALLBACKS *PVSCSILUNIOCALLBACKS; /** * The virtual SCSI request completed callback. */ typedef DECLCALLBACK(void) FNVSCSIREQCOMPLETED(VSCSIDEVICE hVScsiDevice, void *pvVScsiDeviceUser, void *pvVScsiReqUser, int rcScsiCode, bool fRedoPossible, int rcReq, size_t cbXfer); /** Pointer to a virtual SCSI request completed callback. */ typedef FNVSCSIREQCOMPLETED *PFNVSCSIREQCOMPLETED; /** * Create a new empty SCSI device instance. * * @returns VBox status code. * @param phVScsiDevice Where to store the SCSI device handle. * @param pfnVScsiReqCompleted The method call after a request completed. * @param pvVScsiDeviceUser Opaque user data given in the completion callback. */ VBOXDDU_DECL(int) VSCSIDeviceCreate(PVSCSIDEVICE phVScsiDevice, PFNVSCSIREQCOMPLETED pfnVScsiReqCompleted, void *pvVScsiDeviceUser); /** * Destroy a SCSI device instance. * * @returns VBox status code. * @param hVScsiDevice The SCSI device handle to destroy. */ VBOXDDU_DECL(int) VSCSIDeviceDestroy(VSCSIDEVICE hVScsiDevice); /** * Attach a LUN to the SCSI device. * * @returns VBox status code. * @param hVScsiDevice The SCSI device handle to add the LUN to. * @param hVScsiLun The LUN handle to add. * @param iLun The LUN number. */ VBOXDDU_DECL(int) VSCSIDeviceLunAttach(VSCSIDEVICE hVScsiDevice, VSCSILUN hVScsiLun, uint32_t iLun); /** * Detach a LUN from the SCSI device. * * @returns VBox status code. * @param hVScsiDevice The SCSI device handle to add the LUN to. * @param iLun The LUN number to remove. * @param phVScsiLun Where to store the detached LUN handle. */ VBOXDDU_DECL(int) VSCSIDeviceLunDetach(VSCSIDEVICE hVScsiDevice, uint32_t iLun, PVSCSILUN phVScsiLun); /** * Query the SCSI LUN type. * * @returns VBox status code. * @param hVScsiDevice The SCSI device handle. * @param iLun The LUN number to get. * @param pEnmLunType Where to store the LUN type. */ VBOXDDU_DECL(int) VSCSIDeviceLunQueryType(VSCSIDEVICE hVScsiDevice, uint32_t iLun, PVSCSILUNTYPE pEnmLunType); /** * Enqueue a request to the SCSI device. * * @returns VBox status code. * @param hVScsiDevice The SCSI device handle. * @param hVScsiReq The SCSI request handle to enqueue. */ VBOXDDU_DECL(int) VSCSIDeviceReqEnqueue(VSCSIDEVICE hVScsiDevice, VSCSIREQ hVScsiReq); /** * Allocate a new request handle. * * @returns VBox status code. * @param hVScsiDevice The SCSI device handle. * @param phVScsiReq Where to SCSI request handle. * @param iLun The LUN the request is for. * @param pbCDB The CDB for the request. * @param cbCDB The size of the CDB in bytes. * @param cbSGList Number of bytes the S/G list describes. * @param cSGListEntries Number of S/G list entries. * @param paSGList Pointer to the S/G list. * @param pbSense Pointer to the sense buffer. * @param cbSense Size of the sense buffer. * @param pvVScsiReqUser Opqaue user data returned when the request completes. */ VBOXDDU_DECL(int) VSCSIDeviceReqCreate(VSCSIDEVICE hVScsiDevice, PVSCSIREQ phVScsiReq, uint32_t iLun, uint8_t *pbCDB, size_t cbCDB, size_t cbSGList, unsigned cSGListEntries, PCRTSGSEG paSGList, uint8_t *pbSense, size_t cbSense, void *pvVScsiReqUser); /** * Create a new LUN. * * @returns VBox status code. * @param phVScsiLun Where to store the SCSI LUN handle. * @param enmLunType The Lun type. * @param pVScsiLunIoCallbacks Pointer to the I/O callbacks to use for his LUN. * @param pvVScsiLunUser Opaque user argument which * is returned in the pvScsiLunUser parameter * when the request completion callback is called. */ VBOXDDU_DECL(int) VSCSILunCreate(PVSCSILUN phVScsiLun, VSCSILUNTYPE enmLunType, PVSCSILUNIOCALLBACKS pVScsiLunIoCallbacks, void *pvVScsiLunUser); /** * Destroy virtual SCSI LUN. * * @returns VBox status code. * @param hVScsiLun The virtual SCSI LUN handle to destroy. */ VBOXDDU_DECL(int) VSCSILunDestroy(VSCSILUN hVScsiLun); /** * Notify virtual SCSI LUN of medium being mounted. * * @returns VBox status code. * @param hVScsiLun The virtual SCSI LUN handle to destroy. */ VBOXDDU_DECL(int) VSCSILunMountNotify(VSCSILUN hVScsiLun); /** * Notify virtual SCSI LUN of medium being unmounted. * * @returns VBox status code. * @param hVScsiLun The virtual SCSI LUN handle to destroy. */ VBOXDDU_DECL(int) VSCSILunUnmountNotify(VSCSILUN hVScsiLun); /** * Notify a that a I/O request completed. * * @returns VBox status code. * @param hVScsiIoReq The I/O request handle that completed. * This is given when a I/O callback for * the LUN is called by the virtual SCSI layer. * @param rcIoReq The status code the I/O request completed with. * @param fRedoPossible Flag whether it is possible to redo the request. * If true setting any sense code will be omitted * in case of an error to not alter the device state. */ VBOXDDU_DECL(int) VSCSIIoReqCompleted(VSCSIIOREQ hVScsiIoReq, int rcIoReq, bool fRedoPossible); /** * Query the transfer direction of the I/O request. * * @returns Transfer direction.of the given I/O request * @param hVScsiIoReq The SCSI I/O request handle. */ VBOXDDU_DECL(VSCSIIOREQTXDIR) VSCSIIoReqTxDirGet(VSCSIIOREQ hVScsiIoReq); /** * Query I/O parameters. * * @returns VBox status code. * @param hVScsiIoReq The SCSI I/O request handle. * @param puOffset Where to store the start offset. * @param pcbTransfer Where to store the amount of bytes to transfer. * @param pcSeg Where to store the number of segments in the S/G list. * @param pcbSeg Where to store the number of bytes the S/G list describes. * @param ppaSeg Where to store the pointer to the S/G list. */ VBOXDDU_DECL(int) VSCSIIoReqParamsGet(VSCSIIOREQ hVScsiIoReq, uint64_t *puOffset, size_t *pcbTransfer, unsigned *pcSeg, size_t *pcbSeg, PCRTSGSEG *ppaSeg); /** * Query unmap parameters. * * @returns VBox status code. * @param hVScsiIoReq The SCSI I/O request handle. * @param ppaRanges Where to store the pointer to the range array on success. * @param pcRanges Where to store the number of ranges on success. */ VBOXDDU_DECL(int) VSCSIIoReqUnmapParamsGet(VSCSIIOREQ hVScsiIoReq, PCRTRANGE *ppaRanges, unsigned *pcRanges); /** @} */ RT_C_DECLS_END #endif /* ___VBox_vscsi_h */