diff options
Diffstat (limited to 'src/VBox/Main/src-all/NvramStoreImpl.cpp')
| -rw-r--r-- | src/VBox/Main/src-all/NvramStoreImpl.cpp | 1645 |
1 files changed, 1645 insertions, 0 deletions
diff --git a/src/VBox/Main/src-all/NvramStoreImpl.cpp b/src/VBox/Main/src-all/NvramStoreImpl.cpp new file mode 100644 index 00000000..d81c9651 --- /dev/null +++ b/src/VBox/Main/src-all/NvramStoreImpl.cpp @@ -0,0 +1,1645 @@ +/* $Id: NvramStoreImpl.cpp $ */ +/** @file + * VirtualBox COM NVRAM store class implementation + */ + +/* + * Copyright (C) 2021-2022 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_MAIN_NVRAMSTORE +#include "LoggingNew.h" + +#include "NvramStoreImpl.h" +#ifdef VBOX_COM_INPROC +# include "ConsoleImpl.h" +#else +# include "MachineImpl.h" +# include "GuestOSTypeImpl.h" +# include "AutoStateDep.h" +#endif +#include "UefiVariableStoreImpl.h" +#include "VirtualBoxImpl.h" + +#include "AutoCaller.h" + +#include <VBox/com/array.h> +#include <VBox/vmm/pdmdrv.h> +#include <VBox/err.h> + +#include <iprt/cpp/utils.h> +#include <iprt/efi.h> +#include <iprt/file.h> +#include <iprt/vfs.h> +#include <iprt/zip.h> + + +// defines +//////////////////////////////////////////////////////////////////////////////// + +/** Version of the NVRAM saved state unit. */ +#define NVRAM_STORE_SAVED_STATE_VERSION 1 + + +// globals +//////////////////////////////////////////////////////////////////////////////// + +/** + * NVRAM store driver instance data. + */ +typedef struct DRVMAINNVRAMSTORE +{ + /** Pointer to the keyboard object. */ + NvramStore *pNvramStore; + /** Pointer to the driver instance structure. */ + PPDMDRVINS pDrvIns; + /** Our VFS connector interface. */ + PDMIVFSCONNECTOR IVfs; +} DRVMAINNVRAMSTORE, *PDRVMAINNVRAMSTORE; + +/** The NVRAM store map keyed by namespace/entity. */ +typedef std::map<Utf8Str, RTVFSFILE> NvramStoreMap; +/** The NVRAM store map iterator. */ +typedef std::map<Utf8Str, RTVFSFILE>::iterator NvramStoreIter; + +struct BackupableNvramStoreData +{ + BackupableNvramStoreData() + { } + + /** The NVRAM file path. */ + com::Utf8Str strNvramPath; +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + /** The key id used for encrypting the NVRAM file */ + com::Utf8Str strKeyId; + /** The key store containing the encrypting DEK */ + com::Utf8Str strKeyStore; +#endif + /** The NVRAM store. */ + NvramStoreMap mapNvram; +}; + +///////////////////////////////////////////////////////////////////////////// +// NvramStore::Data structure +///////////////////////////////////////////////////////////////////////////// + +struct NvramStore::Data +{ + Data() + : pParent(NULL) +#ifdef VBOX_COM_INPROC + , cRefs(0) + , fSsmSaved(false) +#endif +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + , mpKeyStore(NULL) +#endif + { } + +#ifdef VBOX_COM_INPROC + /** The Console owning this NVRAM store. */ + Console * const pParent; + /** Number of references held to this NVRAM store from the various devices/drivers. */ + volatile uint32_t cRefs; + /** Flag whether the NVRAM data was saved during a save state operation + * preventing it from getting written to the backing file. */ + bool fSsmSaved; +#else + /** The Machine object owning this NVRAM store. */ + Machine * const pParent; + /** The peer NVRAM store object. */ + ComObjPtr<NvramStore> pPeer; + /** The UEFI variable store. */ + const ComObjPtr<UefiVariableStore> pUefiVarStore; +#endif + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + /* Store for secret keys. */ + SecretKeyStore *mpKeyStore; +#endif + + Backupable<BackupableNvramStoreData> bd; +}; + +// constructor / destructor +//////////////////////////////////////////////////////////////////////////////// + +DEFINE_EMPTY_CTOR_DTOR(NvramStore) + +HRESULT NvramStore::FinalConstruct() +{ + return BaseFinalConstruct(); +} + +void NvramStore::FinalRelease() +{ + uninit(); + BaseFinalRelease(); +} + +// public initializer/uninitializer for internal purposes only +///////////////////////////////////////////////////////////////////////////// + +/** + * Initialization stuff shared across the different methods. + * + * @returns COM result indicator + */ +int NvramStore::initImpl() +{ + m = new Data(); + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION +# ifdef VBOX_COM_INPROC + bool fNonPageable = true; +# else + /* Non-pageable memory is not accessible for non-VM process */ + bool fNonPageable = false; +# endif + + m->mpKeyStore = new SecretKeyStore(fNonPageable /* fKeyBufNonPageable */); + AssertReturn(m->mpKeyStore, VERR_NO_MEMORY); +#endif + + return VINF_SUCCESS; +} + + +#if !defined(VBOX_COM_INPROC) +/** + * Initializes the NVRAM store object. + * + * @returns COM result indicator + */ +HRESULT NvramStore::init(Machine *aParent) +{ + LogFlowThisFuncEnter(); + LogFlowThisFunc(("aParent: %p\n", aParent)); + + ComAssertRet(aParent, E_INVALIDARG); + + /* Enclose the state transition NotReady->InInit->Ready */ + AutoInitSpan autoInitSpan(this); + AssertReturn(autoInitSpan.isOk(), E_FAIL); + + int vrc = initImpl(); + if (RT_FAILURE(vrc)) + return E_FAIL; + + /* share the parent weakly */ + unconst(m->pParent) = aParent; + + m->bd.allocate(); + + autoInitSpan.setSucceeded(); + + LogFlowThisFuncLeave(); + return S_OK; +} + +/** + * Initializes the NVRAM store object given another NVRAM store object + * (a kind of copy constructor). This object shares data with + * the object passed as an argument. + * + * @note This object must be destroyed before the original object + * it shares data with is destroyed. + */ +HRESULT NvramStore::init(Machine *aParent, NvramStore *that) +{ + LogFlowThisFuncEnter(); + LogFlowThisFunc(("aParent: %p, that: %p\n", aParent, that)); + + ComAssertRet(aParent && that, E_INVALIDARG); + + /* Enclose the state transition NotReady->InInit->Ready */ + AutoInitSpan autoInitSpan(this); + AssertReturn(autoInitSpan.isOk(), E_FAIL); + + initImpl(); + + unconst(m->pParent) = aParent; + m->pPeer = that; + + AutoWriteLock thatlock(that COMMA_LOCKVAL_SRC_POS); + m->bd.share(that->m->bd); + + autoInitSpan.setSucceeded(); + + LogFlowThisFuncLeave(); + return S_OK; +} + +/** + * Initializes the guest object given another guest object + * (a kind of copy constructor). This object makes a private copy of data + * of the original object passed as an argument. + */ +HRESULT NvramStore::initCopy(Machine *aParent, NvramStore *that) +{ + LogFlowThisFuncEnter(); + LogFlowThisFunc(("aParent: %p, that: %p\n", aParent, that)); + + ComAssertRet(aParent && that, E_INVALIDARG); + + /* Enclose the state transition NotReady->InInit->Ready */ + AutoInitSpan autoInitSpan(this); + AssertReturn(autoInitSpan.isOk(), E_FAIL); + + initImpl(); + + unconst(m->pParent) = aParent; + // mPeer is left null + + AutoWriteLock thatlock(that COMMA_LOCKVAL_SRC_POS); + m->bd.attachCopy(that->m->bd); + + autoInitSpan.setSucceeded(); + + LogFlowThisFuncLeave(); + return S_OK; +} + +#else + +/** + * Initializes the NVRAM store object. + * + * @returns COM result indicator + * @param aParent Handle of our parent object + * @param strNonVolatileStorageFile The NVRAM file path. + */ +HRESULT NvramStore::init(Console *aParent, const com::Utf8Str &strNonVolatileStorageFile) +{ + LogFlowThisFunc(("aParent=%p\n", aParent)); + + ComAssertRet(aParent, E_INVALIDARG); + + /* Enclose the state transition NotReady->InInit->Ready */ + AutoInitSpan autoInitSpan(this); + AssertReturn(autoInitSpan.isOk(), E_FAIL); + + initImpl(); + + unconst(m->pParent) = aParent; + + m->bd.allocate(); + m->bd->strNvramPath = strNonVolatileStorageFile; + + /* Confirm a successful initialization */ + autoInitSpan.setSucceeded(); + + return S_OK; +} +#endif /* VBOX_COM_INPROC */ + + +/** + * Uninitializes the instance and sets the ready flag to FALSE. + * Called either from FinalRelease() or by the parent when it gets destroyed. + */ +void NvramStore::uninit() +{ + LogFlowThisFuncEnter(); + + /* Enclose the state transition Ready->InUninit->NotReady */ + AutoUninitSpan autoUninitSpan(this); + if (autoUninitSpan.uninitDone()) + return; + + unconst(m->pParent) = NULL; +#ifndef VBOX_COM_INPROC + unconst(m->pUefiVarStore) = NULL; +#endif + + /* Delete the NVRAM content. */ + NvramStoreIter it = m->bd->mapNvram.begin(); + while (it != m->bd->mapNvram.end()) + { + RTVfsFileRelease(it->second); + it++; + } + + m->bd->mapNvram.clear(); + m->bd.free(); + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + if (m->mpKeyStore != NULL) + delete m->mpKeyStore; +#endif + + delete m; + m = NULL; + + LogFlowThisFuncLeave(); +} + + +HRESULT NvramStore::getNonVolatileStorageFile(com::Utf8Str &aNonVolatileStorageFile) +{ +#ifndef VBOX_COM_INPROC + Utf8Str strTmp; + { + AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS); + strTmp = m->bd->strNvramPath; + } + + AutoReadLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); + if (strTmp.isEmpty()) + strTmp = m->pParent->i_getDefaultNVRAMFilename(); + if (strTmp.isNotEmpty()) + m->pParent->i_calculateFullPath(strTmp, aNonVolatileStorageFile); +#else + AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS); + aNonVolatileStorageFile = m->bd->strNvramPath; +#endif + + return S_OK; +} + + +HRESULT NvramStore::getUefiVariableStore(ComPtr<IUefiVariableStore> &aUefiVarStore) +{ +#ifndef VBOX_COM_INPROC + /* the machine needs to be mutable */ + AutoMutableStateDependency adep(m->pParent); + if (FAILED(adep.rc())) return adep.rc(); + + Utf8Str strPath; + NvramStore::getNonVolatileStorageFile(strPath); + + /* We need a write lock because of the lazy initialization. */ + AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS); + + /* Check if we have to create the UEFI variable store object */ + HRESULT hrc = S_OK; + if (!m->pUefiVarStore) + { + /* Load the NVRAM file first if it isn't already. */ + if (!m->bd->mapNvram.size()) + { + int vrc = i_loadStore(strPath.c_str()); + if (RT_FAILURE(vrc)) + hrc = setError(E_FAIL, tr("Loading the NVRAM store failed (%Rrc)\n"), vrc); + } + + if (SUCCEEDED(hrc)) + { + NvramStoreIter it = m->bd->mapNvram.find("efi/nvram"); + if (it != m->bd->mapNvram.end()) + { + unconst(m->pUefiVarStore).createObject(); + m->pUefiVarStore->init(this, m->pParent); + } + else + hrc = setError(VBOX_E_OBJECT_NOT_FOUND, tr("The UEFI NVRAM file is not existing for this machine.")); + } + } + + if (SUCCEEDED(hrc)) + { + m->pUefiVarStore.queryInterfaceTo(aUefiVarStore.asOutParam()); + + /* Mark the NVRAM store as potentially modified. */ + m->pParent->i_setModified(Machine::IsModified_NvramStore); + } + + return hrc; +#else + NOREF(aUefiVarStore); + return E_NOTIMPL; +#endif +} + + +HRESULT NvramStore::getKeyId(com::Utf8Str &aKeyId) +{ + AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS); + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + aKeyId = m->bd->strKeyId; +#else + aKeyId = com::Utf8Str::Empty; +#endif + + return S_OK; +} + + +HRESULT NvramStore::getKeyStore(com::Utf8Str &aKeyStore) +{ + AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS); + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + aKeyStore = m->bd->strKeyStore; +#else + aKeyStore = com::Utf8Str::Empty; +#endif + + return S_OK; +} + + +HRESULT NvramStore::initUefiVariableStore(ULONG aSize) +{ +#ifndef VBOX_COM_INPROC + if (aSize != 0) + return setError(E_NOTIMPL, tr("Supporting another NVRAM size apart from the default one is not supported right now")); + + /* the machine needs to be mutable */ + AutoMutableStateDependency adep(m->pParent); + if (FAILED(adep.rc())) return adep.rc(); + + Utf8Str strPath; + NvramStore::getNonVolatileStorageFile(strPath); + + /* We need a write lock because of the lazy initialization. */ + AutoReadLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); + AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS); + + if (m->pParent->i_getFirmwareType() == FirmwareType_BIOS) + return setError(VBOX_E_NOT_SUPPORTED, tr("The selected firmware type doesn't support a UEFI variable store")); + + /* Load the NVRAM file first if it isn't already. */ + HRESULT hrc = S_OK; + if (!m->bd->mapNvram.size()) + { + int vrc = i_loadStore(strPath.c_str()); + if (RT_FAILURE(vrc)) + hrc = setError(E_FAIL, tr("Loading the NVRAM store failed (%Rrc)\n"), vrc); + } + + if (SUCCEEDED(hrc)) + { + int vrc = VINF_SUCCESS; + RTVFSFILE hVfsUefiVarStore = NIL_RTVFSFILE; + NvramStoreIter it = m->bd->mapNvram.find("efi/nvram"); + if (it != m->bd->mapNvram.end()) + hVfsUefiVarStore = it->second; + else + { + /* Create a new file. */ + vrc = RTVfsMemFileCreate(NIL_RTVFSIOSTREAM, 0 /*cbEstimate*/, &hVfsUefiVarStore); + if (RT_SUCCESS(vrc)) + { + /** @todo The size is hardcoded to match what the firmware image uses right now which is a gross hack... */ + vrc = RTVfsFileSetSize(hVfsUefiVarStore, 540672, RTVFSFILE_SIZE_F_NORMAL); + if (RT_SUCCESS(vrc)) + m->bd->mapNvram["efi/nvram"] = hVfsUefiVarStore; + else + RTVfsFileRelease(hVfsUefiVarStore); + } + } + + if (RT_SUCCESS(vrc)) + { + vrc = RTEfiVarStoreCreate(hVfsUefiVarStore, 0 /*offStore*/, 0 /*cbStore*/, RTEFIVARSTORE_CREATE_F_DEFAULT, 0 /*cbBlock*/, + NULL /*pErrInfo*/); + if (RT_FAILURE(vrc)) + return setError(E_FAIL, tr("Failed to initialize the UEFI variable store (%Rrc)"), vrc); + } + else + return setError(E_FAIL, tr("Failed to initialize the UEFI variable store (%Rrc)"), vrc); + + m->pParent->i_setModified(Machine::IsModified_NvramStore); + } + + return hrc; +#else + NOREF(aSize); + return E_NOTIMPL; +#endif +} + + +Utf8Str NvramStore::i_getNonVolatileStorageFile() +{ + AutoCaller autoCaller(this); + AssertReturn(autoCaller.isOk(), Utf8Str::Empty); + + Utf8Str strTmp; + NvramStore::getNonVolatileStorageFile(strTmp); + return strTmp; +} + + +/** + * Loads the NVRAM store from the given TAR filesystem stream. + * + * @returns IPRT status code. + * @param hVfsFssTar Handle to the tar filesystem stream. + */ +int NvramStore::i_loadStoreFromTar(RTVFSFSSTREAM hVfsFssTar) +{ + int vrc = VINF_SUCCESS; + + /* + * Process the stream. + */ + for (;;) + { + /* + * Retrieve the next object. + */ + char *pszName; + RTVFSOBJ hVfsObj; + vrc = RTVfsFsStrmNext(hVfsFssTar, &pszName, NULL, &hVfsObj); + if (RT_FAILURE(vrc)) + { + if (vrc == VERR_EOF) + vrc = VINF_SUCCESS; + break; + } + + RTFSOBJINFO UnixInfo; + vrc = RTVfsObjQueryInfo(hVfsObj, &UnixInfo, RTFSOBJATTRADD_UNIX); + if (RT_SUCCESS(vrc)) + { + switch (UnixInfo.Attr.fMode & RTFS_TYPE_MASK) + { + case RTFS_TYPE_FILE: + { + LogRel(("NvramStore: Loading '%s' from archive\n", pszName)); + RTVFSIOSTREAM hVfsIosEntry = RTVfsObjToIoStream(hVfsObj); + Assert(hVfsIosEntry != NIL_RTVFSIOSTREAM); + + RTVFSFILE hVfsFileEntry; + vrc = RTVfsMemorizeIoStreamAsFile(hVfsIosEntry, RTFILE_O_READ | RTFILE_O_WRITE, &hVfsFileEntry); + if (RT_FAILURE(vrc)) + break; + RTVfsIoStrmRelease(hVfsIosEntry); + + m->bd->mapNvram[Utf8Str(pszName)] = hVfsFileEntry; + break; + } + case RTFS_TYPE_DIRECTORY: + break; + default: + vrc = VERR_NOT_SUPPORTED; + break; + } + } + + /* + * Release the current object and string. + */ + RTVfsObjRelease(hVfsObj); + RTStrFree(pszName); + + if (RT_FAILURE(vrc)) + break; + } + + return vrc; +} + + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION +/** + * Sets up the encryption or decryption machinery. + * + * @returns VBox status code. + * @param hVfsIosInOut Handle to the input stream to be decrypted or the destination to the encrypted + * output is written to. + * @param fEncrypt Flag whether to setup encryption or decryption. + * @param ppCryptoIf Where to store the pointer to the cryptographic interface which needs to be released + * when done. + * @param ppKey Where to store the pointer to the secret key buffer which needs to be released when done. + * @param phVfsIos Where to store the handle to the plaintext I/O stream (either input or output) on success. + */ +int NvramStore::i_setupEncryptionOrDecryption(RTVFSIOSTREAM hVfsIosInOut, bool fEncrypt, + PCVBOXCRYPTOIF *ppCryptoIf, SecretKey **ppKey, + PRTVFSIOSTREAM phVfsIos) +{ + int vrc = VINF_SUCCESS; + PCVBOXCRYPTOIF pCryptoIf = NULL; + SecretKey *pKey = NULL; + const char *pszPassword = NULL; + + vrc = i_retainCryptoIf(&pCryptoIf); + if (RT_SUCCESS(vrc)) + { + vrc = m->mpKeyStore->retainSecretKey(m->bd->strKeyId, &pKey); + if (RT_SUCCESS(vrc)) + { + pszPassword = (const char *)pKey->getKeyBuffer(); + if (fEncrypt) + vrc = pCryptoIf->pfnCryptoIoStrmFromVfsIoStrmEncrypt(hVfsIosInOut, m->bd->strKeyStore.c_str(), pszPassword, + phVfsIos); + else + vrc = pCryptoIf->pfnCryptoIoStrmFromVfsIoStrmDecrypt(hVfsIosInOut, m->bd->strKeyStore.c_str(), pszPassword, + phVfsIos); + if (RT_SUCCESS(vrc)) + { + *ppCryptoIf = pCryptoIf; + *ppKey = pKey; + return VINF_SUCCESS; + } + else + LogRelMax(10, ("Failed to decrypt the NVRAM store using secret key ID '%s' with %Rrc\n", + m->bd->strKeyId.c_str(), vrc)); + + m->mpKeyStore->releaseSecretKey(m->bd->strKeyId); + } + else + LogRelMax(10, ("Failed to retain the secret key ID '%s' with %Rrc\n", + m->bd->strKeyId.c_str(), vrc)); + + i_releaseCryptoIf(pCryptoIf); + } + else + LogRelMax(10, ("Failed to retain the cryptographic interface with %Rrc\n", vrc)); + + return vrc; +} + +/** + * Releases all resources acquired in NvramStore::i_setupEncryptionOrDecryption(). + * + * @returns nothing. + * @param hVfsIos Handle to the I/O stream previously created. + * @param pCryptoIf Pointer to the cryptographic interface being released. + * @param pKey Pointer to the key buffer being released. + */ +void NvramStore::i_releaseEncryptionOrDecryptionResources(RTVFSIOSTREAM hVfsIos, PCVBOXCRYPTOIF pCryptoIf, + SecretKey *pKey) +{ + Assert(hVfsIos != NIL_RTVFSIOSTREAM); + AssertPtr(pCryptoIf); + AssertPtr(pKey); + + i_releaseCryptoIf(pCryptoIf); + pKey->release(); + RTVfsIoStrmRelease(hVfsIos); +} +#endif + + +/** + * Loads the NVRAM store. + * + * @returns IPRT status code. + */ +int NvramStore::i_loadStore(const char *pszPath) +{ + uint64_t cbStore = 0; + int vrc = RTFileQuerySizeByPath(pszPath, &cbStore); + if (RT_SUCCESS(vrc)) + { + if (cbStore <= _1M) /* Arbitrary limit to fend off bogus files because the file will be read into memory completely. */ + { + /* + * Old NVRAM files just consist of the EFI variable store whereas starting + * with VirtualBox 7.0 and the introduction of the TPM the need to handle multiple + * independent NVRAM files came up. For those scenarios all NVRAM states are collected + * in a tar archive. + * + * Here we detect whether the file is the new tar archive format or whether it is just + * the plain EFI variable store file. + */ + RTVFSIOSTREAM hVfsIosNvram; + vrc = RTVfsIoStrmOpenNormal(pszPath, RTFILE_O_OPEN | RTFILE_O_READ | RTFILE_O_DENY_NONE, + &hVfsIosNvram); + if (RT_SUCCESS(vrc)) + { + RTVFSIOSTREAM hVfsIosDecrypted = NIL_RTVFSIOSTREAM; + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + PCVBOXCRYPTOIF pCryptoIf = NULL; + SecretKey *pKey = NULL; + + if ( m->bd->strKeyId.isNotEmpty() + && m->bd->strKeyStore.isNotEmpty()) + vrc = i_setupEncryptionOrDecryption(hVfsIosNvram, false /*fEncrypt*/, + &pCryptoIf, &pKey, &hVfsIosDecrypted); +#endif + if (RT_SUCCESS(vrc)) + { + /* Read the content. */ + RTVFSFILE hVfsFileNvram; + vrc = RTVfsMemorizeIoStreamAsFile( hVfsIosDecrypted != NIL_RTVFSIOSTREAM + ? hVfsIosDecrypted + : hVfsIosNvram, + RTFILE_O_READ, &hVfsFileNvram); + if (RT_SUCCESS(vrc)) + { + if (RT_SUCCESS(vrc)) + { + /* Try to parse it as an EFI variable store. */ + RTVFS hVfsEfiVarStore; + vrc = RTEfiVarStoreOpenAsVfs(hVfsFileNvram, RTVFSMNT_F_READ_ONLY, 0 /*fVarStoreFlags*/, &hVfsEfiVarStore, + NULL /*pErrInfo*/); + if (RT_SUCCESS(vrc)) + { + vrc = RTVfsFileSeek(hVfsFileNvram, 0 /*offSeek*/, RTFILE_SEEK_BEGIN, NULL /*poffActual*/); + AssertRC(vrc); + + RTVfsFileRetain(hVfsFileNvram); /* Retain a new reference for the map. */ + m->bd->mapNvram[Utf8Str("efi/nvram")] = hVfsFileNvram; + + RTVfsRelease(hVfsEfiVarStore); + } + else if (vrc == VERR_VFS_UNKNOWN_FORMAT) + { + /* Check for the new style tar archive. */ + vrc = RTVfsFileSeek(hVfsFileNvram, 0 /*offSeek*/, RTFILE_SEEK_BEGIN, NULL /*poffActual*/); + AssertRC(vrc); + + RTVFSIOSTREAM hVfsIosTar = RTVfsFileToIoStream(hVfsFileNvram); + Assert(hVfsIosTar != NIL_RTVFSIOSTREAM); + + RTVFSFSSTREAM hVfsFssTar; + vrc = RTZipTarFsStreamFromIoStream(hVfsIosTar, 0 /*fFlags*/, &hVfsFssTar); + RTVfsIoStrmRelease(hVfsIosTar); + if (RT_SUCCESS(vrc)) + { + vrc = i_loadStoreFromTar(hVfsFssTar); + RTVfsFsStrmRelease(hVfsFssTar); + } + else + LogRel(("The given NVRAM file is neither a raw UEFI variable store nor a tar archive (opening failed with %Rrc)\n", vrc)); + } + else + LogRel(("Opening the UEFI variable store '%s' failed with %Rrc\n", pszPath, vrc)); + + RTVfsFileRelease(hVfsFileNvram); + } + else + LogRel(("Failed to memorize NVRAM store '%s' with %Rrc\n", pszPath, vrc)); + } + } + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + if (hVfsIosDecrypted != NIL_RTVFSIOSTREAM) + i_releaseEncryptionOrDecryptionResources(hVfsIosDecrypted, pCryptoIf, pKey); +#endif + + RTVfsIoStrmRelease(hVfsIosNvram); + } + else + LogRelMax(10, ("NVRAM store '%s' couldn't be opened with %Rrc\n", pszPath, vrc)); + } + else + LogRelMax(10, ("NVRAM store '%s' exceeds limit of %u bytes, actual size is %u\n", + pszPath, _1M, cbStore)); + } + else if (vrc == VERR_FILE_NOT_FOUND) /* Valid for the first run where no NVRAM file is there. */ + vrc = VINF_SUCCESS; + + return vrc; +} + + +/** + * Saves the NVRAM store as a tar archive. + */ +int NvramStore::i_saveStoreAsTar(const char *pszPath) +{ + uint32_t offError = 0; + RTERRINFOSTATIC ErrInfo; + RTVFSIOSTREAM hVfsIos; + + int vrc = RTVfsChainOpenIoStream(pszPath, RTFILE_O_WRITE | RTFILE_O_DENY_WRITE | RTFILE_O_CREATE_REPLACE, + &hVfsIos, &offError, RTErrInfoInitStatic(&ErrInfo)); + if (RT_SUCCESS(vrc)) + { + RTVFSIOSTREAM hVfsIosEncrypted = NIL_RTVFSIOSTREAM; + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + PCVBOXCRYPTOIF pCryptoIf = NULL; + SecretKey *pKey = NULL; + + if ( m->bd->strKeyId.isNotEmpty() + && m->bd->strKeyStore.isNotEmpty()) + vrc = i_setupEncryptionOrDecryption(hVfsIos, true /*fEncrypt*/, + &pCryptoIf, &pKey, &hVfsIosEncrypted); +#endif + + if (RT_SUCCESS(vrc)) + { + RTVFSFSSTREAM hVfsFss; + vrc = RTZipTarFsStreamToIoStream( hVfsIosEncrypted != NIL_RTVFSIOSTREAM + ? hVfsIosEncrypted + : hVfsIos, + RTZIPTARFORMAT_GNU, 0 /*fFlags*/, &hVfsFss); + if (RT_SUCCESS(vrc)) + { + NvramStoreIter it = m->bd->mapNvram.begin(); + + while (it != m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFile = it->second; + + vrc = RTVfsFileSeek(hVfsFile, 0 /*offSeek*/, RTFILE_SEEK_BEGIN, NULL /*poffActual*/); + AssertRC(vrc); + + RTVFSOBJ hVfsObj = RTVfsObjFromFile(hVfsFile); + vrc = RTVfsFsStrmAdd(hVfsFss, it->first.c_str(), hVfsObj, 0 /*fFlags*/); + RTVfsObjRelease(hVfsObj); + if (RT_FAILURE(vrc)) + break; + + it++; + } + + RTVfsFsStrmRelease(hVfsFss); + } + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + if (hVfsIosEncrypted != NIL_RTVFSIOSTREAM) + i_releaseEncryptionOrDecryptionResources(hVfsIosEncrypted, pCryptoIf, pKey); +#endif + } + + RTVfsIoStrmRelease(hVfsIos); + } + + return vrc; +} + + +int NvramStore::i_retainCryptoIf(PCVBOXCRYPTOIF *ppCryptoIf) +{ +#ifdef VBOX_COM_INPROC + return m->pParent->i_retainCryptoIf(ppCryptoIf); +#else + HRESULT hrc = m->pParent->i_getVirtualBox()->i_retainCryptoIf(ppCryptoIf); + if (SUCCEEDED(hrc)) + return VINF_SUCCESS; + + return VERR_COM_IPRT_ERROR; +#endif +} + + +int NvramStore::i_releaseCryptoIf(PCVBOXCRYPTOIF pCryptoIf) +{ +#ifdef VBOX_COM_INPROC + return m->pParent->i_releaseCryptoIf(pCryptoIf); +#else + HRESULT hrc = m->pParent->i_getVirtualBox()->i_releaseCryptoIf(pCryptoIf); + if (SUCCEEDED(hrc)) + return VINF_SUCCESS; + + return VERR_COM_IPRT_ERROR; +#endif +} + + +/** + * Saves the NVRAM store. + * + * @returns IPRT status code. + */ +int NvramStore::i_saveStore(void) +{ + int vrc = VINF_SUCCESS; + + Utf8Str strTmp; + NvramStore::getNonVolatileStorageFile(strTmp); + + /* + * Only store the NVRAM content if the path is not empty, if it is + * this means the VM was just created and the store was nnot saved yet, + * see @bugref{10191}. + */ + if (strTmp.isNotEmpty()) + { + /* + * Skip creating the tar archive if only the UEFI NVRAM content is available in order + * to maintain backwards compatibility. As soon as there is more than one entry or + * it doesn't belong to the UEFI the tar archive will be created. + */ + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + if ( m->bd->mapNvram.size() == 1 + && m->bd->mapNvram.find(Utf8Str("efi/nvram")) != m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFileNvram = m->bd->mapNvram[Utf8Str("efi/nvram")]; + + vrc = RTVfsFileSeek(hVfsFileNvram, 0 /*offSeek*/, RTFILE_SEEK_BEGIN, NULL /*poffActual*/); + AssertRC(vrc); RT_NOREF(vrc); + + RTVFSIOSTREAM hVfsIosDst; + vrc = RTVfsIoStrmOpenNormal(strTmp.c_str(), RTFILE_O_CREATE_REPLACE | RTFILE_O_WRITE | RTFILE_O_DENY_NONE, + &hVfsIosDst); + if (RT_SUCCESS(vrc)) + { + RTVFSIOSTREAM hVfsIosSrc = RTVfsFileToIoStream(hVfsFileNvram); + Assert(hVfsIosSrc != NIL_RTVFSIOSTREAM); + + RTVFSIOSTREAM hVfsIosEncrypted = NIL_RTVFSIOSTREAM; + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + PCVBOXCRYPTOIF pCryptoIf = NULL; + SecretKey *pKey = NULL; + + if ( m->bd->strKeyId.isNotEmpty() + && m->bd->strKeyStore.isNotEmpty()) + vrc = i_setupEncryptionOrDecryption(hVfsIosDst, true /*fEncrypt*/, + &pCryptoIf, &pKey, &hVfsIosEncrypted); +#endif + + vrc = RTVfsUtilPumpIoStreams(hVfsIosSrc, + hVfsIosEncrypted != NIL_RTVFSIOSTREAM + ? hVfsIosEncrypted + : hVfsIosDst + , 0 /*cbBufHint*/); + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + if (hVfsIosEncrypted != NIL_RTVFSIOSTREAM) + i_releaseEncryptionOrDecryptionResources(hVfsIosEncrypted, pCryptoIf, pKey); +#endif + + RTVfsIoStrmRelease(hVfsIosSrc); + RTVfsIoStrmRelease(hVfsIosDst); + } + } + else if (m->bd->mapNvram.size()) + vrc = i_saveStoreAsTar(strTmp.c_str()); + /* else: No NVRAM content to store so we are done here. */ + } + + return vrc; +} + + +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION +HRESULT NvramStore::i_updateEncryptionSettings(const com::Utf8Str &strKeyId, + const com::Utf8Str &strKeyStore) +{ + /* sanity */ + AutoCaller autoCaller(this); + AssertComRCReturnRC(autoCaller.rc()); + + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + + m->bd.backup(); + m->bd->strKeyId = strKeyId; + m->bd->strKeyStore = strKeyStore; + + /* clear all passwords because they are invalid now */ + m->mpKeyStore->deleteAllSecretKeys(false, true); + + alock.release(); + AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); +#ifndef VBOX_COM_INPROC + m->pParent->i_setModified(Machine::IsModified_NvramStore); +#endif + return S_OK; +} + + +HRESULT NvramStore::i_getEncryptionSettings(com::Utf8Str &strKeyId, + com::Utf8Str &strKeyStore) +{ + AutoCaller autoCaller(this); + AssertComRCReturnRC(autoCaller.rc()); + + AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS); + + strKeyId = m->bd->strKeyId; + strKeyStore = m->bd->strKeyStore; + + return S_OK; +} + + +int NvramStore::i_addPassword(const Utf8Str &strKeyId, const Utf8Str &strPassword) +{ + AutoCaller autoCaller(this); + AssertComRCReturn(autoCaller.rc(), VERR_INVALID_STATE); + + /* keep only required password */ + if (strKeyId != m->bd->strKeyId) + return VINF_SUCCESS; + + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + return m->mpKeyStore->addSecretKey(strKeyId, (const uint8_t *)strPassword.c_str(), strPassword.length() + 1); +} + + +int NvramStore::i_removePassword(const Utf8Str &strKeyId) +{ + AutoCaller autoCaller(this); + AssertComRCReturn(autoCaller.rc(), VERR_INVALID_STATE); + + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + return m->mpKeyStore->deleteSecretKey(strKeyId); +} + + +int NvramStore::i_removeAllPasswords() +{ + AutoCaller autoCaller(this); + AssertComRCReturn(autoCaller.rc(), VERR_INVALID_STATE); + + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + m->mpKeyStore->deleteAllSecretKeys(false, true); + return VINF_SUCCESS; +} +#endif + + +#ifndef VBOX_COM_INPROC +HRESULT NvramStore::i_retainUefiVarStore(PRTVFS phVfs, bool fReadonly) +{ + /* the machine needs to be mutable */ + AutoMutableStateDependency adep(m->pParent); + if (FAILED(adep.rc())) return adep.rc(); + + AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS); + + HRESULT hrc = S_OK; + NvramStoreIter it = m->bd->mapNvram.find("efi/nvram"); + if (it != m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFileNvram = it->second; + RTVFS hVfsEfiVarStore; + uint32_t fMntFlags = fReadonly ? RTVFSMNT_F_READ_ONLY : 0; + + int vrc = RTEfiVarStoreOpenAsVfs(hVfsFileNvram, fMntFlags, 0 /*fVarStoreFlags*/, &hVfsEfiVarStore, + NULL /*pErrInfo*/); + if (RT_SUCCESS(vrc)) + { + *phVfs = hVfsEfiVarStore; + if (!fReadonly) + m->pParent->i_setModified(Machine::IsModified_NvramStore); + } + else + hrc = setError(E_FAIL, tr("Opening the UEFI variable store failed (%Rrc)."), vrc); + } + else + hrc = setError(VBOX_E_OBJECT_NOT_FOUND, tr("The UEFI NVRAM file is not existing for this machine.")); + + return hrc; +} + + +HRESULT NvramStore::i_releaseUefiVarStore(RTVFS hVfs) +{ + RTVfsRelease(hVfs); + return S_OK; +} + + +/** + * Loads settings from the given machine node. + * May be called once right after this object creation. + * + * @param data Configuration settings. + * + * @note Locks this object for writing. + */ +HRESULT NvramStore::i_loadSettings(const settings::NvramSettings &data) +{ + AutoCaller autoCaller(this); + AssertComRCReturnRC(autoCaller.rc()); + + AutoReadLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + + m->bd->strNvramPath = data.strNvramPath; +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + m->bd->strKeyId = data.strKeyId; + m->bd->strKeyStore = data.strKeyStore; +#endif + + Utf8Str strTmp(m->bd->strNvramPath); + if (strTmp.isNotEmpty()) + m->pParent->i_copyPathRelativeToMachine(strTmp, m->bd->strNvramPath); + if ( m->pParent->i_getFirmwareType() == FirmwareType_BIOS + || m->bd->strNvramPath == m->pParent->i_getDefaultNVRAMFilename()) + m->bd->strNvramPath.setNull(); + + return S_OK; +} + +/** + * Saves settings to the given machine node. + * + * @param data Configuration settings. + * + * @note Locks this object for writing. + */ +HRESULT NvramStore::i_saveSettings(settings::NvramSettings &data) +{ + AutoCaller autoCaller(this); + AssertComRCReturnRC(autoCaller.rc()); + + AutoWriteLock wlock(this COMMA_LOCKVAL_SRC_POS); + + data.strNvramPath = m->bd->strNvramPath; +#ifdef VBOX_WITH_FULL_VM_ENCRYPTION + data.strKeyId = m->bd->strKeyId; + data.strKeyStore = m->bd->strKeyStore; +#endif + + int vrc = i_saveStore(); + if (RT_FAILURE(vrc)) + return setError(E_FAIL, tr("Failed to save the NVRAM content to disk (%Rrc)"), vrc); + + return S_OK; +} + +void NvramStore::i_rollback() +{ + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + m->bd.rollback(); +} + +void NvramStore::i_commit() +{ + /* sanity */ + AutoCaller autoCaller(this); + AssertReturnVoid(autoCaller.isOk()); + + /* sanity too */ + AutoCaller peerCaller(m->pPeer); + AssertReturnVoid(peerCaller.isOk()); + + /* lock both for writing since we modify both (mPeer is "master" so locked + * first) */ + AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS); + + if (m->bd.isBackedUp()) + { + m->bd.commit(); + if (m->pPeer) + { + /* attach new data to the peer and reshare it */ + AutoWriteLock peerlock(m->pPeer COMMA_LOCKVAL_SRC_POS); + m->pPeer->m->bd.attach(m->bd); + } + } +} + +void NvramStore::i_copyFrom(NvramStore *aThat) +{ + AssertReturnVoid(aThat != NULL); + + /* sanity */ + AutoCaller autoCaller(this); + AssertReturnVoid(autoCaller.isOk()); + + /* sanity too */ + AutoCaller thatCaller(aThat); + AssertReturnVoid(thatCaller.isOk()); + + /* peer is not modified, lock it for reading (aThat is "master" so locked + * first) */ + AutoReadLock rl(aThat COMMA_LOCKVAL_SRC_POS); + AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS); + + /* this will back up current data */ + m->bd.assignCopy(aThat->m->bd); + + // Intentionally "forget" the NVRAM file since it must be unique and set + // to the correct value before the copy of the settings makes sense. + m->bd->strNvramPath.setNull(); +} + +HRESULT NvramStore::i_applyDefaults(GuestOSType *aOSType) +{ + HRESULT hrc = S_OK; + + if (aOSType->i_recommendedEFISecureBoot()) + { + /* Initialize the UEFI variable store and enroll default keys. */ + hrc = initUefiVariableStore(0 /*aSize*/); + if (SUCCEEDED(hrc)) + { + ComPtr<IUefiVariableStore> pVarStore; + + hrc = getUefiVariableStore(pVarStore); + if (SUCCEEDED(hrc)) + { + hrc = pVarStore->EnrollOraclePlatformKey(); + if (SUCCEEDED(hrc)) + hrc = pVarStore->EnrollDefaultMsSignatures(); + } + } + } + + return hrc; +} + +void NvramStore::i_updateNonVolatileStorageFile(const Utf8Str &aNonVolatileStorageFile) +{ + /* sanity */ + AutoCaller autoCaller(this); + AssertComRCReturnVoid(autoCaller.rc()); + + AutoReadLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); + AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); + + Utf8Str strTmp(aNonVolatileStorageFile); + if (strTmp == m->pParent->i_getDefaultNVRAMFilename()) + strTmp.setNull(); + + if (strTmp == m->bd->strNvramPath) + return; + + m->bd.backup(); + m->bd->strNvramPath = strTmp; +} + +#else +// +// private methods +// +/*static*/ +DECLCALLBACK(int) NvramStore::i_nvramStoreQuerySize(PPDMIVFSCONNECTOR pInterface, const char *pszNamespace, const char *pszPath, + uint64_t *pcb) +{ + PDRVMAINNVRAMSTORE pThis = RT_FROM_MEMBER(pInterface, DRVMAINNVRAMSTORE, IVfs); + + AutoReadLock rlock(pThis->pNvramStore COMMA_LOCKVAL_SRC_POS); + NvramStoreIter it = pThis->pNvramStore->m->bd->mapNvram.find(Utf8StrFmt("%s/%s", pszNamespace, pszPath)); + if (it != pThis->pNvramStore->m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFile = it->second; + return RTVfsFileQuerySize(hVfsFile, pcb); + } + + return VERR_NOT_FOUND; +} + + +/*static*/ +DECLCALLBACK(int) NvramStore::i_nvramStoreReadAll(PPDMIVFSCONNECTOR pInterface, const char *pszNamespace, const char *pszPath, + void *pvBuf, size_t cbRead) +{ + PDRVMAINNVRAMSTORE pThis = RT_FROM_MEMBER(pInterface, DRVMAINNVRAMSTORE, IVfs); + + AutoReadLock rlock(pThis->pNvramStore COMMA_LOCKVAL_SRC_POS); + NvramStoreIter it = pThis->pNvramStore->m->bd->mapNvram.find(Utf8StrFmt("%s/%s", pszNamespace, pszPath)); + if (it != pThis->pNvramStore->m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFile = it->second; + + int vrc = RTVfsFileSeek(hVfsFile, 0 /*offSeek*/, RTFILE_SEEK_BEGIN, NULL /*poffActual*/); + AssertRC(vrc); RT_NOREF(vrc); + + return RTVfsFileRead(hVfsFile, pvBuf, cbRead, NULL /*pcbRead*/); + } + + return VERR_NOT_FOUND; +} + + +/*static*/ +DECLCALLBACK(int) NvramStore::i_nvramStoreWriteAll(PPDMIVFSCONNECTOR pInterface, const char *pszNamespace, const char *pszPath, + const void *pvBuf, size_t cbWrite) +{ + PDRVMAINNVRAMSTORE pThis = RT_FROM_MEMBER(pInterface, DRVMAINNVRAMSTORE, IVfs); + + AutoWriteLock wlock(pThis->pNvramStore COMMA_LOCKVAL_SRC_POS); + + int vrc = VINF_SUCCESS; + NvramStoreIter it = pThis->pNvramStore->m->bd->mapNvram.find(Utf8StrFmt("%s/%s", pszNamespace, pszPath)); + if (it != pThis->pNvramStore->m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFile = it->second; + + vrc = RTVfsFileSeek(hVfsFile, 0 /*offSeek*/, RTFILE_SEEK_BEGIN, NULL /*poffActual*/); + AssertRC(vrc); + vrc = RTVfsFileSetSize(hVfsFile, cbWrite, RTVFSFILE_SIZE_F_NORMAL); + if (RT_SUCCESS(vrc)) + vrc = RTVfsFileWrite(hVfsFile, pvBuf, cbWrite, NULL /*pcbWritten*/); + } + else + { + /* Create a new entry. */ + RTVFSFILE hVfsFile = NIL_RTVFSFILE; + vrc = RTVfsFileFromBuffer(RTFILE_O_READ | RTFILE_O_WRITE, pvBuf, cbWrite, &hVfsFile); + if (RT_SUCCESS(vrc)) + pThis->pNvramStore->m->bd->mapNvram[Utf8StrFmt("%s/%s", pszNamespace, pszPath)] = hVfsFile; + } + + return vrc; +} + + +/*static*/ +DECLCALLBACK(int) NvramStore::i_nvramStoreDelete(PPDMIVFSCONNECTOR pInterface, const char *pszNamespace, const char *pszPath) +{ + PDRVMAINNVRAMSTORE pThis = RT_FROM_MEMBER(pInterface, DRVMAINNVRAMSTORE, IVfs); + + AutoWriteLock wlock(pThis->pNvramStore COMMA_LOCKVAL_SRC_POS); + NvramStoreIter it = pThis->pNvramStore->m->bd->mapNvram.find(Utf8StrFmt("%s/%s", pszNamespace, pszPath)); + if (it != pThis->pNvramStore->m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFile = it->second; + pThis->pNvramStore->m->bd->mapNvram.erase(it); + RTVfsFileRelease(hVfsFile); + return VINF_SUCCESS; + } + + return VERR_NOT_FOUND; +} + + +/*static*/ +DECLCALLBACK(int) NvramStore::i_SsmSaveExec(PPDMDRVINS pDrvIns, PSSMHANDLE pSSM) +{ + PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns); + PDRVMAINNVRAMSTORE pThis = PDMINS_2_DATA(pDrvIns, PDRVMAINNVRAMSTORE); + PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3; + + AutoWriteLock wlock(pThis->pNvramStore COMMA_LOCKVAL_SRC_POS); + + size_t cEntries = pThis->pNvramStore->m->bd->mapNvram.size(); + AssertReturn(cEntries < 32, VERR_OUT_OF_RANGE); /* Some sanity checking. */ + pHlp->pfnSSMPutU32(pSSM, (uint32_t)cEntries); + + void *pvData = NULL; + size_t cbDataMax = 0; + NvramStoreIter it = pThis->pNvramStore->m->bd->mapNvram.begin(); + + while (it != pThis->pNvramStore->m->bd->mapNvram.end()) + { + RTVFSFILE hVfsFile = it->second; + uint64_t cbFile; + + int vrc = RTVfsFileQuerySize(hVfsFile, &cbFile); + AssertRCReturn(vrc, vrc); + AssertReturn(cbFile < _1M, VERR_OUT_OF_RANGE); + + if (cbDataMax < cbFile) + { + pvData = RTMemRealloc(pvData, cbFile); + AssertPtrReturn(pvData, VERR_NO_MEMORY); + cbDataMax = cbFile; + } + + vrc = RTVfsFileReadAt(hVfsFile, 0 /*off*/, pvData, cbFile, NULL /*pcbRead*/); + AssertRCReturn(vrc, vrc); + + pHlp->pfnSSMPutStrZ(pSSM, it->first.c_str()); + pHlp->pfnSSMPutU64(pSSM, cbFile); + pHlp->pfnSSMPutMem(pSSM, pvData, cbFile); + it++; + } + + if (pvData) + RTMemFree(pvData); + + pThis->pNvramStore->m->fSsmSaved = true; + return pHlp->pfnSSMPutU32(pSSM, UINT32_MAX); /* sanity/terminator */ +} + + +/*static*/ +DECLCALLBACK(int) NvramStore::i_SsmLoadExec(PPDMDRVINS pDrvIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass) +{ + PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns); + PDRVMAINNVRAMSTORE pThis = PDMINS_2_DATA(pDrvIns, PDRVMAINNVRAMSTORE); + PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3; + + AssertMsgReturn(uVersion >= NVRAM_STORE_SAVED_STATE_VERSION, ("%d\n", uVersion), + VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION); + + if (uPass == SSM_PASS_FINAL) + { + AutoWriteLock wlock(pThis->pNvramStore COMMA_LOCKVAL_SRC_POS); + + /* Clear any content first. */ + NvramStoreIter it = pThis->pNvramStore->m->bd->mapNvram.begin(); + while (it != pThis->pNvramStore->m->bd->mapNvram.end()) + { + RTVfsFileRelease(it->second); + it++; + } + + pThis->pNvramStore->m->bd->mapNvram.clear(); + + uint32_t cEntries = 0; + int vrc = pHlp->pfnSSMGetU32(pSSM, &cEntries); + AssertRCReturn(vrc, vrc); + AssertReturn(cEntries < 32, VERR_OUT_OF_RANGE); + + void *pvData = NULL; + size_t cbDataMax = 0; + while (cEntries--) + { + char szId[_1K]; /* Lazy developer */ + uint64_t cbFile = 0; + + vrc = pHlp->pfnSSMGetStrZ(pSSM, &szId[0], sizeof(szId)); + AssertRCReturn(vrc, vrc); + + vrc = pHlp->pfnSSMGetU64(pSSM, &cbFile); + AssertRCReturn(vrc, vrc); + AssertReturn(cbFile < _1M, VERR_OUT_OF_RANGE); + + if (cbDataMax < cbFile) + { + pvData = RTMemRealloc(pvData, cbFile); + AssertPtrReturn(pvData, VERR_NO_MEMORY); + cbDataMax = cbFile; + } + + vrc = pHlp->pfnSSMGetMem(pSSM, pvData, cbFile); + AssertRCReturn(vrc, vrc); + + RTVFSFILE hVfsFile; + vrc = RTVfsFileFromBuffer(RTFILE_O_READWRITE, pvData, cbFile, &hVfsFile); + AssertRCReturn(vrc, vrc); + + pThis->pNvramStore->m->bd->mapNvram[Utf8Str(szId)] = hVfsFile; + } + + if (pvData) + RTMemFree(pvData); + + /* The marker. */ + uint32_t u32; + vrc = pHlp->pfnSSMGetU32(pSSM, &u32); + AssertRCReturn(vrc, vrc); + AssertMsgReturn(u32 == UINT32_MAX, ("%#x\n", u32), VERR_SSM_DATA_UNIT_FORMAT_CHANGED); + } + + return VINF_SUCCESS; +} + + +/** + * @interface_method_impl{PDMIBASE,pfnQueryInterface} + */ +DECLCALLBACK(void *) NvramStore::i_drvQueryInterface(PPDMIBASE pInterface, const char *pszIID) +{ + PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface); + PDRVMAINNVRAMSTORE pDrv = PDMINS_2_DATA(pDrvIns, PDRVMAINNVRAMSTORE); + + PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase); + PDMIBASE_RETURN_INTERFACE(pszIID, PDMIVFSCONNECTOR, &pDrv->IVfs); + return NULL; +} + + +/** + * Destruct a NVRAM store driver instance. + * + * @returns VBox status code. + * @param pDrvIns The driver instance data. + */ +DECLCALLBACK(void) NvramStore::i_drvDestruct(PPDMDRVINS pDrvIns) +{ + PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns); + PDRVMAINNVRAMSTORE pThis = PDMINS_2_DATA(pDrvIns, PDRVMAINNVRAMSTORE); + LogFlow(("NvramStore::drvDestruct: iInstance=%d\n", pDrvIns->iInstance)); + + if (pThis->pNvramStore) + { + uint32_t cRefs = ASMAtomicDecU32(&pThis->pNvramStore->m->cRefs); + if ( !cRefs + && !pThis->pNvramStore->m->fSsmSaved) + { + int vrc = pThis->pNvramStore->i_saveStore(); + AssertRC(vrc); /** @todo Disk full error? */ + } + } +} + + +/** + * Construct a NVRAM store driver instance. + * + * @copydoc FNPDMDRVCONSTRUCT + */ +DECLCALLBACK(int) NvramStore::i_drvConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags) +{ + PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns); + RT_NOREF(fFlags, pCfg); + PDRVMAINNVRAMSTORE pThis = PDMINS_2_DATA(pDrvIns, PDRVMAINNVRAMSTORE); + LogFlow(("NvramStore::drvConstruct: iInstance=%d\n", pDrvIns->iInstance)); + + /* + * Validate configuration. + */ + PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "", ""); + AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER, + ("Configuration error: Not possible to attach anything to this driver!\n"), + VERR_PDM_DRVINS_NO_ATTACH); + + /* + * IBase. + */ + pDrvIns->IBase.pfnQueryInterface = NvramStore::i_drvQueryInterface; + + pThis->IVfs.pfnQuerySize = NvramStore::i_nvramStoreQuerySize; + pThis->IVfs.pfnReadAll = NvramStore::i_nvramStoreReadAll; + pThis->IVfs.pfnWriteAll = NvramStore::i_nvramStoreWriteAll; + pThis->IVfs.pfnDelete = NvramStore::i_nvramStoreDelete; + + /* + * Get the NVRAM store object pointer. + */ + com::Guid uuid(COM_IIDOF(INvramStore)); + pThis->pNvramStore = (NvramStore *)PDMDrvHlpQueryGenericUserObject(pDrvIns, uuid.raw()); + if (!pThis->pNvramStore) + { + AssertMsgFailed(("Configuration error: No/bad NVRAM store object!\n")); + return VERR_NOT_FOUND; + } + + /* + * Only the first instance will register the SSM handlers and will do the work on behalf + * of all other NVRAM store driver instances when it comes to SSM. + */ + if (pDrvIns->iInstance == 0) + { + int vrc = PDMDrvHlpSSMRegister(pDrvIns, NVRAM_STORE_SAVED_STATE_VERSION, 0 /*cbGuess*/, + NvramStore::i_SsmSaveExec, NvramStore::i_SsmLoadExec); + if (RT_FAILURE(vrc)) + return PDMDrvHlpVMSetError(pDrvIns, vrc, RT_SRC_POS, + N_("Failed to register the saved state unit for the NVRAM store")); + } + + uint32_t cRefs = ASMAtomicIncU32(&pThis->pNvramStore->m->cRefs); + if (cRefs == 1) + { + int vrc = pThis->pNvramStore->i_loadStore(pThis->pNvramStore->m->bd->strNvramPath.c_str()); + if (RT_FAILURE(vrc)) + { + ASMAtomicDecU32(&pThis->pNvramStore->m->cRefs); + return PDMDrvHlpVMSetError(pDrvIns, vrc, RT_SRC_POS, + N_("Failed to load the NVRAM store from the file")); + } + } + + return VINF_SUCCESS; +} + + +/** + * NVRAM store driver registration record. + */ +const PDMDRVREG NvramStore::DrvReg = +{ + /* u32Version */ + PDM_DRVREG_VERSION, + /* szName */ + "NvramStore", + /* szRCMod */ + "", + /* szR0Mod */ + "", + /* pszDescription */ + "Main NVRAM store driver (Main as in the API).", + /* fFlags */ + PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT, + /* fClass. */ + PDM_DRVREG_CLASS_STATUS, + /* cMaxInstances */ + ~0U, + /* cbInstance */ + sizeof(DRVMAINNVRAMSTORE), + /* pfnConstruct */ + NvramStore::i_drvConstruct, + /* pfnDestruct */ + NvramStore::i_drvDestruct, + /* pfnRelocate */ + NULL, + /* pfnIOCtl */ + NULL, + /* pfnPowerOn */ + NULL, + /* pfnReset */ + NULL, + /* pfnSuspend */ + NULL, + /* pfnResume */ + NULL, + /* pfnAttach */ + NULL, + /* pfnDetach */ + NULL, + /* pfnPowerOff */ + NULL, + /* pfnSoftReset */ + NULL, + /* u32EndVersion */ + PDM_DRVREG_VERSION +}; +#endif /* !VBOX_COM_INPROC */ + +/* vi: set tabstop=4 shiftwidth=4 expandtab: */ |