/* $Id: SSM.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */ /** @file * SSM - Saved State Manager. */ /* * Copyright (C) 2006-2013 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. */ /** @page pg_ssm SSM - The Saved State Manager * * The Saved State Manager (SSM) implements facilities for saving and loading a * VM state in a structural manner using callbacks for named data units. * * At init time each of the VMM components, Devices, Drivers and one or two * other things will register data units which they need to save and restore. * Each unit have a unique name (ascii), instance number, and a set of callbacks * associated with it. The name will be used to identify the unit during * restore. The callbacks are for the two operations, save and restore. There * are three callbacks for each of the two - a prepare, a execute and a complete * - giving each component ample opportunity to perform actions both before and * afterwards. * * The SSM provides a number of APIs for encoding and decoding the data: @see * grp_ssm * * * * @section sec_ssm_live_snapshots Live Snapshots * * The live snapshots feature (LS) is similar to teleportation (TP) and was a * natural first step when implementing TP. The main differences between LS and * TP are that after a live snapshot we will have a saved state file, disk image * snapshots, and the VM will still be running. * * Compared to normal saved stated and snapshots, the difference is in that the * VM is running while we do most of the saving. Prior to LS, there was only * one round of callbacks during saving and the VM was paused during it. With * LS there are 1 or more passes while the VM is still running and a final one * after it has been paused. The runtime passes are executed on a dedicated * thread running at at the same priority as the EMTs so that the saving doesn't * starve or lose in scheduling questions (note: not implemented yet). The final * pass is done on EMT(0). * * There are a couple of common reasons why LS and TP will fail: * - Memory configuration changed (PCI memory mappings). * - Takes too long (TP) / Too much output (LS). * * * The live saving sequence is something like this: * * -# SSMR3LiveSave is called on EMT0. It returns a saved state * handle. * -# SSMR3LiveDoStep1 is called on a non-EMT. This will save the major * parts of the state while the VM may still be running. * -# The VM is suspended. * -# SSMR3LiveDoStep2 is called on EMT0 to save the remainder of the state * in the normal way. * -# The client does any necessary reconfiguration of harddisks and * similar. * -# SSMR3LiveDone is called on EMT0 to close the handle. * -# The VM is resumed or powered off and destroyed. * * * @section sec_ssm_teleportation Teleportation * * As mentioned in the previous section, the main differences between this and * live snapshots are in where the saved state is written and what state the * local VM is in afterwards - at least from the VMM point of view. The * necessary administrative work - establishing the connection to the remote * machine, cloning the VM config on it and doing lowlevel saved state data * transfer - is taken care of by layer above the VMM (i.e. Main). * * The SSM data format was made streamable for the purpose of teleportation * (v1.2 was the last non-streamable version). * * * @section sec_ssm_format Saved State Format * * The stream format starts with a header (SSMFILEHDR) that indicates the * version and such things, it is followed by zero or more saved state units * (name + instance + pass), and the stream concludes with a footer * (SSMFILEFTR) that contains unit counts and optionally a checksum for the * entire file. (In version 1.2 and earlier, the checksum was in the header and * there was no footer. This meant that the header was updated after the entire * file was written.) * * The saved state units each starts with a variable sized header * (SSMFILEUNITHDRV2) that contains the name, instance and pass. The data * follows the header and is encoded as records with a 2-8 byte record header * indicating the type, flags and size. The first byte in the record header * indicates the type and flags: * * - bits 0..3: Record type: * - type 0: Invalid. * - type 1: Terminator with CRC-32 and unit size. * - type 2: Raw data record. * - type 3: Raw data compressed by LZF. The data is prefixed by a 8-bit * field containing the length of the uncompressed data given in * 1KB units. * - type 4: Zero data. The record header is followed by a 8-bit field * counting the length of the zero data given in 1KB units. * - type 5: Named data - length prefixed name followed by the data. This * type is not implemented yet as we're missing the API part, so * the type assignment is tentative. * - types 6 thru 15 are current undefined. * - bit 4: Important (set), can be skipped (clear). * - bit 5: Undefined flag, must be zero. * - bit 6: Undefined flag, must be zero. * - bit 7: "magic" bit, always set. * * Record header byte 2 (optionally thru 7) is the size of the following data * encoded in UTF-8 style. To make buffering simpler and more efficient during * the save operation, the strict checks enforcing optimal encoding has been * relaxed for the 2 and 3 byte encodings. * * (In version 1.2 and earlier the unit data was compressed and not record * based. The unit header contained the compressed size of the data, i.e. it * needed updating after the data was written.) * * * @section sec_ssm_future Future Changes * * There are plans to extend SSM to make it easier to be both backwards and * (somewhat) forwards compatible. One of the new features will be being able * to classify units and data items as unimportant (added to the format in * v2.0). Another suggested feature is naming data items (also added to the * format in v2.0), perhaps by extending the SSMR3PutStruct API. Both features * will require API changes, the naming may possibly require both buffering of * the stream as well as some helper managing them. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_SSM #include #include #include #include #include #include "SSMInternal.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /******************************************************************************* * Defined Constants And Macros * *******************************************************************************/ /** The max length of a unit name. */ #define SSM_MAX_NAME_SIZE 48 /** Saved state file magic base string. */ #define SSMFILEHDR_MAGIC_BASE "\177VirtualBox SavedState " /** Saved state file magic indicating version 1.x. */ #define SSMFILEHDR_MAGIC_V1_X "\177VirtualBox SavedState V1." /** Saved state file v1.1 magic. */ #define SSMFILEHDR_MAGIC_V1_1 "\177VirtualBox SavedState V1.1\n" /** Saved state file v1.2 magic. */ #define SSMFILEHDR_MAGIC_V1_2 "\177VirtualBox SavedState V1.2\n\0\0\0" /** Saved state file v2.0 magic. */ #define SSMFILEHDR_MAGIC_V2_0 "\177VirtualBox SavedState V2.0\n\0\0\0" /** @name SSMFILEHDR::fFlags * @{ */ /** The stream is checksummed up to the footer using CRC-32. */ #define SSMFILEHDR_FLAGS_STREAM_CRC32 RT_BIT_32(0) /** Indicates that the file was produced by a live save. */ #define SSMFILEHDR_FLAGS_STREAM_LIVE_SAVE RT_BIT_32(1) /** @} */ /** The directory magic. */ #define SSMFILEDIR_MAGIC "\nDir\n\0\0" /** Saved state file v2.0 magic. */ #define SSMFILEFTR_MAGIC "\nFooter" /** Data unit magic. */ #define SSMFILEUNITHDR_MAGIC "\nUnit\n\0" /** Data end marker magic. */ #define SSMFILEUNITHDR_END "\nTheEnd" /** @name Record Types (data unit) * @{ */ /** The record type mask. */ #define SSM_REC_TYPE_MASK UINT8_C(0x0f) /** Invalid record. */ #define SSM_REC_TYPE_INVALID 0 /** Normal termination record, see SSMRECTERM. */ #define SSM_REC_TYPE_TERM 1 /** Raw data. The data follows the size field without further ado. */ #define SSM_REC_TYPE_RAW 2 /** Raw data compressed by LZF. * The record header is followed by a 8-bit field containing the size of the * uncompressed data in 1KB units. The compressed data is after it. */ #define SSM_REC_TYPE_RAW_LZF 3 /** Raw zero data. * The record header is followed by a 8-bit field containing the size of the * zero data in 1KB units. */ #define SSM_REC_TYPE_RAW_ZERO 4 /** Named data items. * A length prefix zero terminated string (i.e. max 255) followed by the data. */ #define SSM_REC_TYPE_NAMED 5 /** Macro for validating the record type. * This can be used with the flags+type byte, no need to mask out the type first. */ #define SSM_REC_TYPE_IS_VALID(u8Type) ( ((u8Type) & SSM_REC_TYPE_MASK) > SSM_REC_TYPE_INVALID \ && ((u8Type) & SSM_REC_TYPE_MASK) <= SSM_REC_TYPE_NAMED ) /** @} */ /** The flag mask. */ #define SSM_REC_FLAGS_MASK UINT8_C(0xf0) /** The record is important if this flag is set, if clear it can be omitted. */ #define SSM_REC_FLAGS_IMPORTANT UINT8_C(0x10) /** This flag is always set. */ #define SSM_REC_FLAGS_FIXED UINT8_C(0x80) /** Macro for validating the flags. * No need to mask the flags out of the flags+type byte before invoking this macro. */ #define SSM_REC_FLAGS_ARE_VALID(fFlags) ( ((fFlags) & UINT8_C(0xe0)) == UINT8_C(0x80) ) /** Macro for validating the type and flags byte in a data record. */ #define SSM_REC_ARE_TYPE_AND_FLAGS_VALID(u8) ( SSM_REC_FLAGS_ARE_VALID(u8) && SSM_REC_TYPE_IS_VALID(u8) ) /** @name SSMRECTERM::fFlags * @{ */ /** There is a CRC-32 value for the stream. */ #define SSMRECTERM_FLAGS_CRC32 UINT16_C(0x0001) /** @} */ /** Start structure magic. (Isaac Asimov) */ #define SSMR3STRUCT_BEGIN UINT32_C(0x19200102) /** End structure magic. (Isaac Asimov) */ #define SSMR3STRUCT_END UINT32_C(0x19920406) /** Number of bytes to log in Log2 and Log4 statements. */ #define SSM_LOG_BYTES 16 /** SSMHANDLE::fCancelled value indicating that the operation has been * cancelled. */ #define SSMHANDLE_CANCELLED UINT32_C(0xdeadbeef) /** SSMHANDLE::fCancelled value indicating no cancellation. */ #define SSMHANDLE_OK UINT32_C(0x77777777) /** Macro for checking the u32CRC field of a structure. * The Msg can assume there are u32ActualCRC and u32CRC in the context. */ #define SSM_CHECK_CRC32_RET(p, cb, Msg) \ do \ { \ uint32_t u32CRC = (p)->u32CRC; \ (p)->u32CRC = 0; \ uint32_t u32ActualCRC = RTCrc32((p), (cb)); \ (p)->u32CRC = u32CRC; \ AssertLogRelMsgReturn(u32ActualCRC == u32CRC, Msg, VERR_SSM_INTEGRITY_CRC); \ } while (0) /** The number of bytes to compress is one block. * Must be a multiple of 1KB. */ #define SSM_ZIP_BLOCK_SIZE _4K AssertCompile(SSM_ZIP_BLOCK_SIZE / _1K * _1K == SSM_ZIP_BLOCK_SIZE); /** * Asserts that the handle is writable and returns with VERR_SSM_INVALID_STATE * if it isn't. */ #define SSM_ASSERT_WRITEABLE_RET(pSSM) \ AssertMsgReturn( pSSM->enmOp == SSMSTATE_SAVE_EXEC \ || pSSM->enmOp == SSMSTATE_LIVE_EXEC,\ ("Invalid state %d\n", pSSM->enmOp), VERR_SSM_INVALID_STATE); /** * Asserts that the handle is readable and returns with VERR_SSM_INVALID_STATE * if it isn't. */ #define SSM_ASSERT_READABLE_RET(pSSM) \ AssertMsgReturn( pSSM->enmOp == SSMSTATE_LOAD_EXEC \ || pSSM->enmOp == SSMSTATE_OPEN_READ,\ ("Invalid state %d\n", pSSM->enmOp), VERR_SSM_INVALID_STATE); /** Checks for cancellation and returns if pending. * Sets SSMHANDLE::rc to VERR_SSM_CANCELLED (if it still indicates success) and * then returns SSMHANDLE::rc. (Debug logging only.) */ #define SSM_CHECK_CANCELLED_RET(pSSM) \ do \ { \ if (RT_UNLIKELY(ASMAtomicUoReadU32(&(pSSM)->fCancelled) == SSMHANDLE_CANCELLED)) \ { \ LogFlow(("%Rfn: Cancelled -> VERR_SSM_CANCELLED\n", __PRETTY_FUNCTION__)); \ if (RT_SUCCESS((pSSM)->rc)) \ (pSSM)->rc = VERR_SSM_CANCELLED; \ return (pSSM)->rc; \ } \ } while (0) /** * Asserts that the handle is somewhat valid. No returns as this is just a * simple safeguard for catching bad API calls. */ #define SSM_ASSERT_VALID_HANDLE(pSSM) \ do \ { \ AssertPtr(pSSM); \ Assert(pSSM->enmOp > SSMSTATE_INVALID && pSSM->enmOp < SSMSTATE_END); \ } while (0) /** @def SSM_HOST_IS_MSC_32 * Set to 1 if the host is 32-bit MSC, otherwise set to 0. * */ #if defined(_MSC_VER) && HC_ARCH_BITS == 32 # define SSM_HOST_IS_MSC_32 1 #else # define SSM_HOST_IS_MSC_32 0 #endif /******************************************************************************* * Structures and Typedefs * *******************************************************************************/ /** SSM state. */ typedef enum SSMSTATE { SSMSTATE_INVALID = 0, SSMSTATE_LIVE_PREP, SSMSTATE_LIVE_STEP1, SSMSTATE_LIVE_EXEC, SSMSTATE_LIVE_VOTE, SSMSTATE_LIVE_STEP2, SSMSTATE_SAVE_PREP, SSMSTATE_SAVE_EXEC, SSMSTATE_SAVE_DONE, SSMSTATE_LOAD_PREP, SSMSTATE_LOAD_EXEC, SSMSTATE_LOAD_DONE, SSMSTATE_OPEN_READ, SSMSTATE_END } SSMSTATE; /** Pointer to a SSM stream buffer. */ typedef struct SSMSTRMBUF *PSSMSTRMBUF; /** * A SSM stream buffer. */ typedef struct SSMSTRMBUF { /** The buffer data. */ uint8_t abData[_64K]; /** The stream position of this buffer. */ uint64_t offStream; /** The amount of buffered data. */ uint32_t cb; /** End of stream indicator (for read streams only). */ bool fEndOfStream; /** The nano timestamp set by ssmR3StrmGetFreeBuf. */ uint64_t NanoTS; /** Pointer to the next buffer in the chain. */ PSSMSTRMBUF volatile pNext; } SSMSTRMBUF; /** * SSM stream. * * This is a typical producer / consumer setup with a dedicated I/O thread and * fixed number of buffers for read ahead and write back. */ typedef struct SSMSTRM { /** The stream method table. */ PCSSMSTRMOPS pOps; /** The user argument for the stream methods. * For file based streams, this is the file handle and not a pointer. */ void *pvUser; /** Write (set) or read (clear) stream. */ bool fWrite; /** Termination indicator. */ bool volatile fTerminating; /** Indicates whether it is necessary to seek before the next buffer is * read from the stream. This is used to avoid a seek in ssmR3StrmPeekAt. */ bool fNeedSeek; /** Stream error status. */ int32_t volatile rc; /** The handle of the I/O thread. This is set to nil when not active. */ RTTHREAD hIoThread; /** Where to seek to. */ uint64_t offNeedSeekTo; /** The head of the consumer queue. * For save the consumer is the I/O thread. For load the I/O thread is the * producer. */ PSSMSTRMBUF volatile pHead; /** Chain of free buffers. * The consumer/producer roles are the inverse of pHead. */ PSSMSTRMBUF volatile pFree; /** Event that's signalled when pHead is updated. */ RTSEMEVENT hEvtHead; /** Event that's signalled when pFree is updated. */ RTSEMEVENT hEvtFree; /** List of pending buffers that has been dequeued from pHead and reversed. */ PSSMSTRMBUF pPending; /** Pointer to the current buffer. */ PSSMSTRMBUF pCur; /** The stream offset of the current buffer. */ uint64_t offCurStream; /** The current buffer offset. */ uint32_t off; /** Whether we're checksumming reads/writes. */ bool fChecksummed; /** The stream CRC if fChecksummed is set. */ uint32_t u32StreamCRC; /** How far into the buffer u32StreamCRC is up-to-date. * This may lag behind off as it's desirable to checksum as large blocks as * possible. */ uint32_t offStreamCRC; } SSMSTRM; /** Pointer to a SSM stream. */ typedef SSMSTRM *PSSMSTRM; /** * Handle structure. */ typedef struct SSMHANDLE { /** Stream/buffer manager. */ SSMSTRM Strm; /** Pointer to the VM. */ PVM pVM; /** The current operation. */ SSMSTATE enmOp; /** What to do after save completes. (move the enum) */ SSMAFTER enmAfter; /** Flag indicating that the operation has been cancelled. */ uint32_t volatile fCancelled; /** The current rc of the save operation. */ int32_t rc; /** Number of compressed bytes left in the current data unit (V1). */ uint64_t cbUnitLeftV1; /** The current compressed? offset into the data unit. */ uint64_t offUnit; /** The current user data offset into the unit (debug purposes). */ uint64_t offUnitUser; /** Indicates that this is a live save or restore operation. */ bool fLiveSave; /** Pointer to the progress callback function. */ PFNVMPROGRESS pfnProgress; /** User specified argument to the callback function. */ void *pvUser; /** Next completion percentage. (corresponds to offEstProgress) */ unsigned uPercent; /** The position of the next progress callback in the estimated file. */ uint64_t offEstProgress; /** The estimated total byte count. * (Only valid after the prep.) */ uint64_t cbEstTotal; /** Current position in the estimated file. */ uint64_t offEst; /** End of current unit in the estimated file. */ uint64_t offEstUnitEnd; /** The amount of % we reserve for the 'live' stage */ unsigned uPercentLive; /** The amount of % we reserve for the 'prepare' phase */ unsigned uPercentPrepare; /** The amount of % we reserve for the 'done' stage */ unsigned uPercentDone; /** The lowest value reported via SSMR3HandleReportLivePercent during one * vote run. */ unsigned uReportedLivePercent; /** The filename, NULL if remote stream. */ const char *pszFilename; union { /** Write data. */ struct { /** Offset into the databuffer. */ uint32_t offDataBuffer; /** Space for the record header. */ uint8_t abRecHdr[1+7]; /** Data buffer. */ uint8_t abDataBuffer[4096]; /** The maximum downtime given as milliseconds. */ uint32_t cMsMaxDowntime; } Write; /** Read data. */ struct { /** V1: The decompressor of the current data unit. */ PRTZIPDECOMP pZipDecompV1; /** The major format version number. */ uint32_t uFmtVerMajor; /** The minor format version number. */ uint32_t uFmtVerMinor; /** V2: Unread bytes in the current record. */ uint32_t cbRecLeft; /** V2: Bytes in the data buffer. */ uint32_t cbDataBuffer; /** V2: Current buffer position. */ uint32_t offDataBuffer; /** V2: End of data indicator. */ bool fEndOfData; /** V2: The type and flags byte fo the current record. */ uint8_t u8TypeAndFlags; /** @name Context info for SSMR3SetLoadError. * @{ */ /** Pointer to the header for the current unit. */ PSSMUNIT pCurUnit; /** The version of the current unit if in the load exec stage. */ uint32_t uCurUnitVer; /** The pass number of the current unit if in the load exec stage. */ uint32_t uCurUnitPass; /** Whether SSMR3SetLoadError[V] has been called. * @note Using ASMAtomicXchgBool because I'm very lazy. */ bool volatile fHaveSetError; /** @} */ /** RTGCPHYS size in bytes. (Only applicable when loading/reading.) */ unsigned cbGCPhys; /** RTGCPTR size in bytes. (Only applicable when loading/reading.) */ unsigned cbGCPtr; /** Whether cbGCPtr is fixed or settable. */ bool fFixedGCPtrSize; /** 32-bit MSC saved this? */ bool fIsHostMsc32; /** "Host OS" dot "architecture", picked up from recent SSM data units. */ char szHostOSAndArch[32]; /** @name Header info (set by ssmR3ValidateFile) * @{ */ /** The size of the file header. */ uint32_t cbFileHdr; /** The major version number. */ uint16_t u16VerMajor; /** The minor version number. */ uint16_t u16VerMinor; /** The build number. */ uint32_t u32VerBuild; /** The SVN revision. */ uint32_t u32SvnRev; /** 32 or 64 depending on the host. */ uint8_t cHostBits; /** Whether the stream is checksummed (SSMFILEHDR_FLAGS_STREAM_CRC32). */ bool fStreamCrc32; /** The CRC of the loaded file. */ uint32_t u32LoadCRC; /** The size of the load file. */ uint64_t cbLoadFile; /** @} */ /** V2: Data buffer. * @remarks Be extremely careful when changing the size of this buffer! */ uint8_t abDataBuffer[4096]; /** V2: Decompression buffer for when we cannot use the stream buffer. */ uint8_t abComprBuffer[4096]; } Read; } u; } SSMHANDLE; /** * Header of the saved state file. * * Added in r5xxxx on 2009-07-2?, VirtualBox v3.0.51. */ typedef struct SSMFILEHDR { /** Magic string which identifies this file as a version of VBox saved state * file format (SSMFILEHDR_MAGIC_V2_0). */ char szMagic[32]; /** The major version number. */ uint16_t u16VerMajor; /** The minor version number. */ uint16_t u16VerMinor; /** The build number. */ uint32_t u32VerBuild; /** The SVN revision. */ uint32_t u32SvnRev; /** 32 or 64 depending on the host. */ uint8_t cHostBits; /** The size of RTGCPHYS. */ uint8_t cbGCPhys; /** The size of RTGCPTR. */ uint8_t cbGCPtr; /** Reserved header space - must be zero. */ uint8_t u8Reserved; /** The number of units that (may) have stored data in the file. */ uint32_t cUnits; /** Flags, see SSMFILEHDR_FLAGS_XXX. */ uint32_t fFlags; /** The maximum size of decompressed data. */ uint32_t cbMaxDecompr; /** The checksum of this header. * This field is set to zero when calculating the checksum. */ uint32_t u32CRC; } SSMFILEHDR; AssertCompileSize(SSMFILEHDR, 64); AssertCompileMemberOffset(SSMFILEHDR, u32CRC, 60); AssertCompileMemberSize(SSMFILEHDR, szMagic, sizeof(SSMFILEHDR_MAGIC_V2_0)); /** Pointer to a saved state file header. */ typedef SSMFILEHDR *PSSMFILEHDR; /** Pointer to a const saved state file header. */ typedef SSMFILEHDR const *PCSSMFILEHDR; /** * Header of the saved state file. * * Added in r40980 on 2008-12-15, VirtualBox v2.0.51. * * @remarks This is a superset of SSMFILEHDRV11. */ typedef struct SSMFILEHDRV12 { /** Magic string which identifies this file as a version of VBox saved state * file format (SSMFILEHDR_MAGIC_V1_2). */ char achMagic[32]; /** The size of this file. Used to check * whether the save completed and that things are fine otherwise. */ uint64_t cbFile; /** File checksum. The actual calculation skips past the u32CRC field. */ uint32_t u32CRC; /** Padding. */ uint32_t u32Reserved; /** The machine UUID. (Ignored if NIL.) */ RTUUID MachineUuid; /** The major version number. */ uint16_t u16VerMajor; /** The minor version number. */ uint16_t u16VerMinor; /** The build number. */ uint32_t u32VerBuild; /** The SVN revision. */ uint32_t u32SvnRev; /** 32 or 64 depending on the host. */ uint8_t cHostBits; /** The size of RTGCPHYS. */ uint8_t cbGCPhys; /** The size of RTGCPTR. */ uint8_t cbGCPtr; /** Padding. */ uint8_t au8Reserved; } SSMFILEHDRV12; AssertCompileSize(SSMFILEHDRV12, 64+16); AssertCompileMemberOffset(SSMFILEHDRV12, u32CRC, 40); AssertCompileMemberSize(SSMFILEHDRV12, achMagic, sizeof(SSMFILEHDR_MAGIC_V1_2)); /** Pointer to a saved state file header. */ typedef SSMFILEHDRV12 *PSSMFILEHDRV12; /** * Header of the saved state file, version 1.1. * * Added in r23677 on 2007-08-17, VirtualBox v1.4.1. */ typedef struct SSMFILEHDRV11 { /** Magic string which identifies this file as a version of VBox saved state * file format (SSMFILEHDR_MAGIC_V1_1). */ char achMagic[32]; /** The size of this file. Used to check * whether the save completed and that things are fine otherwise. */ uint64_t cbFile; /** File checksum. The actual calculation skips past the u32CRC field. */ uint32_t u32CRC; /** Padding. */ uint32_t u32Reserved; /** The machine UUID. (Ignored if NIL.) */ RTUUID MachineUuid; } SSMFILEHDRV11; AssertCompileSize(SSMFILEHDRV11, 64); AssertCompileMemberOffset(SSMFILEHDRV11, u32CRC, 40); /** Pointer to a saved state file header. */ typedef SSMFILEHDRV11 *PSSMFILEHDRV11; /** * Data unit header. */ typedef struct SSMFILEUNITHDRV2 { /** Magic (SSMFILEUNITHDR_MAGIC or SSMFILEUNITHDR_END). */ char szMagic[8]; /** The offset in the saved state stream of the start of this unit. * This is mainly intended for sanity checking. */ uint64_t offStream; /** The CRC-in-progress value this unit starts at. */ uint32_t u32CurStreamCRC; /** The checksum of this structure, including the whole name. * Calculated with this field set to zero. */ uint32_t u32CRC; /** Data version. */ uint32_t u32Version; /** Instance number. */ uint32_t u32Instance; /** Data pass number. */ uint32_t u32Pass; /** Flags reserved for future extensions. Must be zero. */ uint32_t fFlags; /** Size of the data unit name including the terminator. (bytes) */ uint32_t cbName; /** Data unit name, variable size. */ char szName[SSM_MAX_NAME_SIZE]; } SSMFILEUNITHDRV2; AssertCompileMemberOffset(SSMFILEUNITHDRV2, szName, 44); AssertCompileMemberSize(SSMFILEUNITHDRV2, szMagic, sizeof(SSMFILEUNITHDR_MAGIC)); AssertCompileMemberSize(SSMFILEUNITHDRV2, szMagic, sizeof(SSMFILEUNITHDR_END)); /** Pointer to SSMFILEUNITHDRV2. */ typedef SSMFILEUNITHDRV2 *PSSMFILEUNITHDRV2; /** * Data unit header. * * This is used by v1.0, v1.1 and v1.2 of the format. */ typedef struct SSMFILEUNITHDRV1 { /** Magic (SSMFILEUNITHDR_MAGIC or SSMFILEUNITHDR_END). */ char achMagic[8]; /** Number of bytes in this data unit including the header. */ uint64_t cbUnit; /** Data version. */ uint32_t u32Version; /** Instance number. */ uint32_t u32Instance; /** Size of the data unit name including the terminator. (bytes) */ uint32_t cchName; /** Data unit name. */ char szName[1]; } SSMFILEUNITHDRV1; /** Pointer to SSMFILEUNITHDR. */ typedef SSMFILEUNITHDRV1 *PSSMFILEUNITHDRV1; /** * Termination data record. */ typedef struct SSMRECTERM { uint8_t u8TypeAndFlags; /** The record size (sizeof(SSMRECTERM) - 2). */ uint8_t cbRec; /** Flags, see SSMRECTERM_FLAGS_CRC32. */ uint16_t fFlags; /** The checksum of the stream up to fFlags (exclusive). */ uint32_t u32StreamCRC; /** The length of this data unit in bytes (including this record). */ uint64_t cbUnit; } SSMRECTERM; AssertCompileSize(SSMRECTERM, 16); AssertCompileMemberAlignment(SSMRECTERM, cbUnit, 8); /** Pointer to a termination record. */ typedef SSMRECTERM *PSSMRECTERM; /** Pointer to a const termination record. */ typedef SSMRECTERM const *PCSSMRECTERM; /** * Directory entry. */ typedef struct SSMFILEDIRENTRY { /** The offset of the data unit. */ uint64_t off; /** The instance number. */ uint32_t u32Instance; /** The CRC-32 of the name excluding the terminator. (lazy bird) */ uint32_t u32NameCRC; } SSMFILEDIRENTRY; AssertCompileSize(SSMFILEDIRENTRY, 16); /** Pointer to a directory entry. */ typedef SSMFILEDIRENTRY *PSSMFILEDIRENTRY; /** Pointer to a const directory entry. */ typedef SSMFILEDIRENTRY const *PCSSMFILEDIRENTRY; /** * Directory for the data units from the final pass. * * This is used to speed up SSMR3Seek (it would have to decompress and parse the * whole stream otherwise). */ typedef struct SSMFILEDIR { /** Magic string (SSMFILEDIR_MAGIC). */ char szMagic[8]; /** The CRC-32 for the whole directory. * Calculated with this field set to zero. */ uint32_t u32CRC; /** The number of directory entries. */ uint32_t cEntries; /** The directory entries (variable size). */ SSMFILEDIRENTRY aEntries[1]; } SSMFILEDIR; AssertCompileSize(SSMFILEDIR, 32); /** Pointer to a directory. */ typedef SSMFILEDIR *PSSMFILEDIR; /** Pointer to a const directory. */ typedef SSMFILEDIR *PSSMFILEDIR; /** * Footer structure */ typedef struct SSMFILEFTR { /** Magic string (SSMFILEFTR_MAGIC). */ char szMagic[8]; /** The offset of this record in the stream. */ uint64_t offStream; /** The CRC for the stream. * This is set to zero if SSMFILEHDR_FLAGS_STREAM_CRC32 is clear. */ uint32_t u32StreamCRC; /** Number directory entries. */ uint32_t cDirEntries; /** Reserved footer space - must be zero. */ uint32_t u32Reserved; /** The CRC-32 for this structure. * Calculated with this field set to zero. */ uint32_t u32CRC; } SSMFILEFTR; AssertCompileSize(SSMFILEFTR, 32); /** Pointer to a footer. */ typedef SSMFILEFTR *PSSMFILEFTR; /** Pointer to a const footer. */ typedef SSMFILEFTR const *PCSSMFILEFTR; /******************************************************************************* * Global Variables * *******************************************************************************/ /** Zeros used by the struct putter. * This must be at least 8 bytes or the code breaks. */ static uint8_t const g_abZero[_1K] = {0}; /******************************************************************************* * Internal Functions * *******************************************************************************/ #ifndef SSM_STANDALONE static int ssmR3LazyInit(PVM pVM); static DECLCALLBACK(int) ssmR3SelfLiveExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass); static DECLCALLBACK(int) ssmR3SelfSaveExec(PVM pVM, PSSMHANDLE pSSM); static DECLCALLBACK(int) ssmR3SelfLoadExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass); static DECLCALLBACK(int) ssmR3LiveControlLoadExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass); static int ssmR3Register(PVM pVM, const char *pszName, uint32_t uInstance, uint32_t uVersion, size_t cbGuess, const char *pszBefore, PSSMUNIT *ppUnit); static int ssmR3LiveControlEmit(PSSMHANDLE pSSM, long double lrdPct, uint32_t uPass); #endif static int ssmR3StrmWriteBuffers(PSSMSTRM pStrm); static int ssmR3StrmReadMore(PSSMSTRM pStrm); #ifndef SSM_STANDALONE static int ssmR3DataFlushBuffer(PSSMHANDLE pSSM); #endif static int ssmR3DataReadRecHdrV2(PSSMHANDLE pSSM); #ifndef SSM_STANDALONE /** * Cleans up resources allocated by SSM on VM termination. * * @param pVM Pointer to the VM. */ VMMR3_INT_DECL(void) SSMR3Term(PVM pVM) { if (pVM->ssm.s.fInitialized) { pVM->ssm.s.fInitialized = false; RTCritSectDelete(&pVM->ssm.s.CancelCritSect); } } /** * Performs lazy initialization of the SSM. * * @returns VBox status code. * @param pVM The VM. */ static int ssmR3LazyInit(PVM pVM) { /* * Register a saved state unit which we use to put the VirtualBox version, * revision and similar stuff in. */ pVM->ssm.s.fInitialized = true; int rc = SSMR3RegisterInternal(pVM, "SSM", 0 /*uInstance*/, 1 /*uVersion*/, 64 /*cbGuess*/, NULL /*pfnLivePrep*/, ssmR3SelfLiveExec, NULL /*pfnLiveVote*/, NULL /*pfnSavePrep*/, ssmR3SelfSaveExec, NULL /*pfnSaveDone*/, NULL /*pfnSavePrep*/, ssmR3SelfLoadExec, NULL /*pfnSaveDone*/); if (RT_SUCCESS(rc)) rc = SSMR3RegisterInternal(pVM, "SSMLiveControl", 0 /*uInstance*/, 1 /*uVersion*/, 1 /*cbGuess*/, NULL /*pfnLivePrep*/, NULL /*pfnLiveExec*/, NULL /*pfnLiveVote*/, NULL /*pfnSavePrep*/, NULL /*pfnSaveExec*/, NULL /*pfnSaveDone*/, NULL /*pfnSavePrep*/, ssmR3LiveControlLoadExec, NULL /*pfnSaveDone*/); /* * Initialize the cancellation critsect now. */ if (RT_SUCCESS(rc)) rc = RTCritSectInit(&pVM->ssm.s.CancelCritSect); if (RT_SUCCESS(rc)) { STAM_REL_REG_USED(pVM, &pVM->ssm.s.uPass, STAMTYPE_U32, "/SSM/uPass", STAMUNIT_COUNT, "Current pass"); } pVM->ssm.s.fInitialized = RT_SUCCESS(rc); return rc; } /** * Do ssmR3SelfSaveExec in pass 0. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The SSM handle. * @param uPass The data pass number. */ static DECLCALLBACK(int) ssmR3SelfLiveExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass) { if (uPass == 0) { int rc = ssmR3SelfSaveExec(pVM, pSSM); if (RT_SUCCESS(rc)) rc = VINF_SSM_DONT_CALL_AGAIN; return rc; } AssertFailed(); return VERR_SSM_UNEXPECTED_PASS; } /** * For saving usful things without having to go thru the tedious process of * adding it to the header. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The SSM handle. */ static DECLCALLBACK(int) ssmR3SelfSaveExec(PVM pVM, PSSMHANDLE pSSM) { NOREF(pVM); /* * String table containing pairs of variable and value string. * Terminated by two empty strings. */ SSMR3PutStrZ(pSSM, "Build Type"); SSMR3PutStrZ(pSSM, KBUILD_TYPE); SSMR3PutStrZ(pSSM, "Host OS"); SSMR3PutStrZ(pSSM, KBUILD_TARGET "." KBUILD_TARGET_ARCH); #ifdef VBOX_OSE SSMR3PutStrZ(pSSM, "OSE"); SSMR3PutStrZ(pSSM, "true"); #endif /* terminator */ SSMR3PutStrZ(pSSM, ""); return SSMR3PutStrZ(pSSM, ""); } /** * For load the version + revision and stuff. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The SSM handle. * @param uVersion The version (1). * @param uPass The pass. */ static DECLCALLBACK(int) ssmR3SelfLoadExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass) { AssertLogRelMsgReturn(uVersion == 1, ("%d", uVersion), VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION); NOREF(pVM); NOREF(uPass); /* * The first and last passes contains a {name, value} string table that is * terminated by two emptry strings. It contains useful informal build * info and can be very handy when something goes wrong after restore. */ if ( uPass == 0 || uPass == SSM_PASS_FINAL) { for (unsigned i = 0; ; i++) { char szVar[128]; char szValue[1024]; int rc = SSMR3GetStrZ(pSSM, szVar, sizeof(szVar)); AssertRCReturn(rc, rc); rc = SSMR3GetStrZ(pSSM, szValue, sizeof(szValue)); AssertRCReturn(rc, rc); if (!szVar[0] && !szValue[0]) break; if (i == 0) LogRel(("SSM: Saved state info:\n")); LogRel(("SSM: %s: %s\n", szVar, szValue)); /* * Detect 32-bit MSC for handling SSMFIELD_ENTRY_PAD_MSC32_AUTO. * Save the Host OS for SSMR3HandleHostOSAndArch */ if (!strcmp(szVar, "Host OS")) { bool fIsHostMsc32 = !strcmp(szValue, "win.x86"); if (fIsHostMsc32 != pSSM->u.Read.fIsHostMsc32) { LogRel(("SSM: (fIsHostMsc32 %RTbool => %RTbool)\n", pSSM->u.Read.fIsHostMsc32, fIsHostMsc32)); pSSM->u.Read.fIsHostMsc32 = fIsHostMsc32; } size_t cchValue = strlen(szValue); size_t cchCopy = RT_MIN(cchValue, sizeof(pSSM->u.Read.szHostOSAndArch) - 1); Assert(cchValue == cchCopy); memcpy(pSSM->u.Read.szHostOSAndArch, szValue, cchCopy); pSSM->u.Read.szHostOSAndArch[cchCopy] = '\0'; } } } return VINF_SUCCESS; } /** * Load exec callback for the special live save state unit that tracks the * progress of a live save. * * This is saved by ssmR3LiveControlEmit(). * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The SSM handle. * @param uVersion The version (1). * @param uPass The pass. */ static DECLCALLBACK(int) ssmR3LiveControlLoadExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass) { AssertLogRelMsgReturn(uVersion == 1, ("%d", uVersion), VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION); NOREF(uPass); uint16_t uPartsPerTenThousand; int rc = SSMR3GetU16(pSSM, &uPartsPerTenThousand); if (RT_SUCCESS(rc)) { /* Scale it down to fit in our exec range. */ unsigned uPct = (unsigned)( (long double)uPartsPerTenThousand / 100 * (100 - pSSM->uPercentPrepare - pSSM->uPercentDone) / 100) + pSSM->uPercentPrepare; if (uPct != pSSM->uPercent) { AssertMsg(uPct < 100, ("uPct=%d uPartsPerTenThousand=%d uPercentPrepare=%d uPercentDone=%d\n", uPct, uPartsPerTenThousand, pSSM->uPercentPrepare, pSSM->uPercentDone)); pSSM->uPercent = uPct; if (pSSM->pfnProgress) pSSM->pfnProgress(pVM->pUVM, RT_MIN(uPct, 100 - pSSM->uPercentDone), pSSM->pvUser); } } return rc; } /** * Internal registration worker. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pszName Data unit name. * @param uInstance The instance id. * @param uVersion The data unit version. * @param cbGuess The guessed data unit size. * @param pszBefore Name of data unit to be placed in front of. * Optional. * @param ppUnit Where to store the inserted unit node. * Caller must fill in the missing details. */ static int ssmR3Register(PVM pVM, const char *pszName, uint32_t uInstance, uint32_t uVersion, size_t cbGuess, const char *pszBefore, PSSMUNIT *ppUnit) { /* * Validate input. */ AssertPtr(pszName); AssertReturn(*pszName, VERR_INVALID_PARAMETER); size_t cchName = strlen(pszName); AssertMsgReturn(cchName < SSM_MAX_NAME_SIZE, ("%zu >= %u: %s\n", cchName, SSM_MAX_NAME_SIZE, pszName), VERR_OUT_OF_RANGE); AssertReturn(!pszBefore || *pszBefore, VERR_INVALID_PARAMETER); size_t cchBefore = pszBefore ? strlen(pszBefore) : 0; AssertMsgReturn(cchBefore < SSM_MAX_NAME_SIZE, ("%zu >= %u: %s\n", cchBefore, SSM_MAX_NAME_SIZE, pszBefore), VERR_OUT_OF_RANGE); /* * Lazy init. */ if (!pVM->ssm.s.fInitialized) { int rc = ssmR3LazyInit(pVM); AssertRCReturn(rc, rc); } /* * Walk to the end of the list checking for duplicates as we go. */ PSSMUNIT pUnitBeforePrev = NULL; PSSMUNIT pUnitBefore = NULL; PSSMUNIT pUnitPrev = NULL; PSSMUNIT pUnit = pVM->ssm.s.pHead; while (pUnit) { if ( pUnit->u32Instance == uInstance && pUnit->cchName == cchName && !memcmp(pUnit->szName, pszName, cchName)) { AssertMsgFailed(("Duplicate registration %s\n", pszName)); return VERR_SSM_UNIT_EXISTS; } if ( pUnit->cchName == cchBefore && !pUnitBefore && !memcmp(pUnit->szName, pszBefore, cchBefore)) { pUnitBeforePrev = pUnitPrev; pUnitBefore = pUnit; } /* next */ pUnitPrev = pUnit; pUnit = pUnit->pNext; } /* * Allocate new node. */ pUnit = (PSSMUNIT)MMR3HeapAllocZ(pVM, MM_TAG_SSM, RT_OFFSETOF(SSMUNIT, szName[cchName + 1])); if (!pUnit) return VERR_NO_MEMORY; /* * Fill in (some) data. (Stuff is zero'd.) */ pUnit->u32Version = uVersion; pUnit->u32Instance = uInstance; pUnit->cbGuess = cbGuess; pUnit->cchName = cchName; memcpy(pUnit->szName, pszName, cchName); /* * Insert */ if (pUnitBefore) { pUnit->pNext = pUnitBefore; if (pUnitBeforePrev) pUnitBeforePrev->pNext = pUnit; else pVM->ssm.s.pHead = pUnit; } else if (pUnitPrev) pUnitPrev->pNext = pUnit; else pVM->ssm.s.pHead = pUnit; pVM->ssm.s.cUnits++; *ppUnit = pUnit; return VINF_SUCCESS; } /** * Register a PDM Devices data unit. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param pDevIns Device instance. * @param pszName Data unit name. * @param uInstance The instance identifier of the data unit. * This must together with the name be unique. * @param uVersion Data layout version number. * @param cbGuess The approximate amount of data in the unit. * Only for progress indicators. * @param pszBefore Name of data unit which we should be put in front * of. Optional (NULL). * * @param pfnLivePrep Prepare live save callback, optional. * @param pfnLiveExec Execute live save callback, optional. * @param pfnLiveVote Vote live save callback, optional. * * @param pfnSavePrep Prepare save callback, optional. * @param pfnSaveExec Execute save callback, optional. * @param pfnSaveDone Done save callback, optional. * * @param pfnLoadPrep Prepare load callback, optional. * @param pfnLoadExec Execute load callback, optional. * @param pfnLoadDone Done load callback, optional. */ VMMR3_INT_DECL(int) SSMR3RegisterDevice(PVM pVM, PPDMDEVINS pDevIns, const char *pszName, uint32_t uInstance, uint32_t uVersion, size_t cbGuess, const char *pszBefore, PFNSSMDEVLIVEPREP pfnLivePrep, PFNSSMDEVLIVEEXEC pfnLiveExec, PFNSSMDEVLIVEVOTE pfnLiveVote, PFNSSMDEVSAVEPREP pfnSavePrep, PFNSSMDEVSAVEEXEC pfnSaveExec, PFNSSMDEVSAVEDONE pfnSaveDone, PFNSSMDEVLOADPREP pfnLoadPrep, PFNSSMDEVLOADEXEC pfnLoadExec, PFNSSMDEVLOADDONE pfnLoadDone) { PSSMUNIT pUnit; int rc = ssmR3Register(pVM, pszName, uInstance, uVersion, cbGuess, pszBefore, &pUnit); if (RT_SUCCESS(rc)) { pUnit->enmType = SSMUNITTYPE_DEV; pUnit->u.Dev.pfnLivePrep = pfnLivePrep; pUnit->u.Dev.pfnLiveExec = pfnLiveExec; pUnit->u.Dev.pfnLiveVote = pfnLiveVote; pUnit->u.Dev.pfnSavePrep = pfnSavePrep; pUnit->u.Dev.pfnSaveExec = pfnSaveExec; pUnit->u.Dev.pfnSaveDone = pfnSaveDone; pUnit->u.Dev.pfnLoadPrep = pfnLoadPrep; pUnit->u.Dev.pfnLoadExec = pfnLoadExec; pUnit->u.Dev.pfnLoadDone = pfnLoadDone; pUnit->u.Dev.pDevIns = pDevIns; pUnit->pCritSect = PDMR3DevGetCritSect(pVM, pDevIns); } return rc; } /** * Register a PDM driver data unit. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param pDrvIns Driver instance. * @param pszName Data unit name. * @param uInstance The instance identifier of the data unit. * This must together with the name be unique. * @param uVersion Data layout version number. * @param cbGuess The approximate amount of data in the unit. * Only for progress indicators. * * @param pfnLivePrep Prepare live save callback, optional. * @param pfnLiveExec Execute live save callback, optional. * @param pfnLiveVote Vote live save callback, optional. * * @param pfnSavePrep Prepare save callback, optional. * @param pfnSaveExec Execute save callback, optional. * @param pfnSaveDone Done save callback, optional. * * @param pfnLoadPrep Prepare load callback, optional. * @param pfnLoadExec Execute load callback, optional. * @param pfnLoadDone Done load callback, optional. */ VMMR3_INT_DECL(int) SSMR3RegisterDriver(PVM pVM, PPDMDRVINS pDrvIns, const char *pszName, uint32_t uInstance, uint32_t uVersion, size_t cbGuess, PFNSSMDRVLIVEPREP pfnLivePrep, PFNSSMDRVLIVEEXEC pfnLiveExec, PFNSSMDRVLIVEVOTE pfnLiveVote, PFNSSMDRVSAVEPREP pfnSavePrep, PFNSSMDRVSAVEEXEC pfnSaveExec, PFNSSMDRVSAVEDONE pfnSaveDone, PFNSSMDRVLOADPREP pfnLoadPrep, PFNSSMDRVLOADEXEC pfnLoadExec, PFNSSMDRVLOADDONE pfnLoadDone) { PSSMUNIT pUnit; int rc = ssmR3Register(pVM, pszName, uInstance, uVersion, cbGuess, NULL, &pUnit); if (RT_SUCCESS(rc)) { pUnit->enmType = SSMUNITTYPE_DRV; pUnit->u.Drv.pfnLivePrep = pfnLivePrep; pUnit->u.Drv.pfnLiveExec = pfnLiveExec; pUnit->u.Drv.pfnLiveVote = pfnLiveVote; pUnit->u.Drv.pfnSavePrep = pfnSavePrep; pUnit->u.Drv.pfnSaveExec = pfnSaveExec; pUnit->u.Drv.pfnSaveDone = pfnSaveDone; pUnit->u.Drv.pfnLoadPrep = pfnLoadPrep; pUnit->u.Drv.pfnLoadExec = pfnLoadExec; pUnit->u.Drv.pfnLoadDone = pfnLoadDone; pUnit->u.Drv.pDrvIns = pDrvIns; } return rc; } /** * Register a internal data unit. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param pszName Data unit name. * @param uInstance The instance identifier of the data unit. * This must together with the name be unique. * @param uVersion Data layout version number. * @param cbGuess The approximate amount of data in the unit. * Only for progress indicators. * * @param pfnLivePrep Prepare live save callback, optional. * @param pfnLiveExec Execute live save callback, optional. * @param pfnLiveVote Vote live save callback, optional. * * @param pfnSavePrep Prepare save callback, optional. * @param pfnSaveExec Execute save callback, optional. * @param pfnSaveDone Done save callback, optional. * * @param pfnLoadPrep Prepare load callback, optional. * @param pfnLoadExec Execute load callback, optional. * @param pfnLoadDone Done load callback, optional. */ VMMR3DECL(int) SSMR3RegisterInternal(PVM pVM, const char *pszName, uint32_t uInstance, uint32_t uVersion, size_t cbGuess, PFNSSMINTLIVEPREP pfnLivePrep, PFNSSMINTLIVEEXEC pfnLiveExec, PFNSSMINTLIVEVOTE pfnLiveVote, PFNSSMINTSAVEPREP pfnSavePrep, PFNSSMINTSAVEEXEC pfnSaveExec, PFNSSMINTSAVEDONE pfnSaveDone, PFNSSMINTLOADPREP pfnLoadPrep, PFNSSMINTLOADEXEC pfnLoadExec, PFNSSMINTLOADDONE pfnLoadDone) { PSSMUNIT pUnit; int rc = ssmR3Register(pVM, pszName, uInstance, uVersion, cbGuess, NULL, &pUnit); if (RT_SUCCESS(rc)) { pUnit->enmType = SSMUNITTYPE_INTERNAL; pUnit->u.Internal.pfnLivePrep = pfnLivePrep; pUnit->u.Internal.pfnLiveExec = pfnLiveExec; pUnit->u.Internal.pfnLiveVote = pfnLiveVote; pUnit->u.Internal.pfnSavePrep = pfnSavePrep; pUnit->u.Internal.pfnSaveExec = pfnSaveExec; pUnit->u.Internal.pfnSaveDone = pfnSaveDone; pUnit->u.Internal.pfnLoadPrep = pfnLoadPrep; pUnit->u.Internal.pfnLoadExec = pfnLoadExec; pUnit->u.Internal.pfnLoadDone = pfnLoadDone; } return rc; } /** * Register an external data unit. * * @returns VBox status. * * @param pUVM The user mode VM handle. * @param pszName Data unit name. * @param uInstance The instance identifier of the data unit. * This must together with the name be unique. * @param uVersion Data layout version number. * @param cbGuess The approximate amount of data in the unit. * Only for progress indicators. * * @param pfnLivePrep Prepare live save callback, optional. * @param pfnLiveExec Execute live save callback, optional. * @param pfnLiveVote Vote live save callback, optional. * * @param pfnSavePrep Prepare save callback, optional. * @param pfnSaveExec Execute save callback, optional. * @param pfnSaveDone Done save callback, optional. * * @param pfnLoadPrep Prepare load callback, optional. * @param pfnLoadExec Execute load callback, optional. * @param pfnLoadDone Done load callback, optional. * @param pvUser User argument. */ VMMR3DECL(int) SSMR3RegisterExternal(PUVM pUVM, const char *pszName, uint32_t uInstance, uint32_t uVersion, size_t cbGuess, PFNSSMEXTLIVEPREP pfnLivePrep, PFNSSMEXTLIVEEXEC pfnLiveExec, PFNSSMEXTLIVEVOTE pfnLiveVote, PFNSSMEXTSAVEPREP pfnSavePrep, PFNSSMEXTSAVEEXEC pfnSaveExec, PFNSSMEXTSAVEDONE pfnSaveDone, PFNSSMEXTLOADPREP pfnLoadPrep, PFNSSMEXTLOADEXEC pfnLoadExec, PFNSSMEXTLOADDONE pfnLoadDone, void *pvUser) { UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE); PVM pVM = pUVM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); PSSMUNIT pUnit; int rc = ssmR3Register(pVM, pszName, uInstance, uVersion, cbGuess, NULL, &pUnit); if (RT_SUCCESS(rc)) { pUnit->enmType = SSMUNITTYPE_EXTERNAL; pUnit->u.External.pfnLivePrep = pfnLivePrep; pUnit->u.External.pfnLiveExec = pfnLiveExec; pUnit->u.External.pfnLiveVote = pfnLiveVote; pUnit->u.External.pfnSavePrep = pfnSavePrep; pUnit->u.External.pfnSaveExec = pfnSaveExec; pUnit->u.External.pfnSaveDone = pfnSaveDone; pUnit->u.External.pfnLoadPrep = pfnLoadPrep; pUnit->u.External.pfnLoadExec = pfnLoadExec; pUnit->u.External.pfnLoadDone = pfnLoadDone; pUnit->u.External.pvUser = pvUser; } return rc; } /** * Deregister one or more PDM Device data units. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param pDevIns Device instance. * @param pszName Data unit name. * Use NULL to deregister all data units for that device instance. * @param uInstance The instance identifier of the data unit. * This must together with the name be unique. * @remark Only for dynamic data units and dynamic unloaded modules. */ VMMR3_INT_DECL(int) SSMR3DeregisterDevice(PVM pVM, PPDMDEVINS pDevIns, const char *pszName, uint32_t uInstance) { /* * Validate input. */ if (!pDevIns) { AssertMsgFailed(("pDevIns is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Search the list. */ size_t cchName = pszName ? strlen(pszName) : 0; int rc = pszName ? VERR_SSM_UNIT_NOT_FOUND : VINF_SUCCESS; PSSMUNIT pUnitPrev = NULL; PSSMUNIT pUnit = pVM->ssm.s.pHead; while (pUnit) { if ( pUnit->enmType == SSMUNITTYPE_DEV && ( !pszName || ( pUnit->cchName == cchName && !memcmp(pUnit->szName, pszName, cchName))) && pUnit->u32Instance == uInstance ) { if (pUnit->u.Dev.pDevIns == pDevIns) { /* * Unlink it, advance pointer, and free the node. */ PSSMUNIT pFree = pUnit; pUnit = pUnit->pNext; if (pUnitPrev) pUnitPrev->pNext = pUnit; else pVM->ssm.s.pHead = pUnit; pVM->ssm.s.cUnits--; Log(("SSM: Removed data unit '%s' (pdm dev).\n", pFree->szName)); MMR3HeapFree(pFree); if (pszName) return VINF_SUCCESS; rc = VINF_SUCCESS; continue; } else if (pszName) { AssertMsgFailed(("Caller is not owner! Owner=%p Caller=%p %s\n", pUnit->u.Dev.pDevIns, pDevIns, pszName)); return VERR_SSM_UNIT_NOT_OWNER; } } /* next */ pUnitPrev = pUnit; pUnit = pUnit->pNext; } return rc; } /** * Deregister one ore more PDM Driver data units. * * @returns VBox status. * @param pVM Pointer to the VM. * @param pDrvIns Driver instance. * @param pszName Data unit name. * Use NULL to deregister all data units for that driver instance. * @param uInstance The instance identifier of the data unit. * This must together with the name be unique. Ignored if pszName is NULL. * @remark Only for dynamic data units and dynamic unloaded modules. */ VMMR3_INT_DECL(int) SSMR3DeregisterDriver(PVM pVM, PPDMDRVINS pDrvIns, const char *pszName, uint32_t uInstance) { /* * Validate input. */ if (!pDrvIns) { AssertMsgFailed(("pDrvIns is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Search the list. */ size_t cchName = pszName ? strlen(pszName) : 0; int rc = pszName ? VERR_SSM_UNIT_NOT_FOUND : VINF_SUCCESS; PSSMUNIT pUnitPrev = NULL; PSSMUNIT pUnit = pVM->ssm.s.pHead; while (pUnit) { if ( pUnit->enmType == SSMUNITTYPE_DRV && ( !pszName || ( pUnit->cchName == cchName && !memcmp(pUnit->szName, pszName, cchName) && pUnit->u32Instance == uInstance)) ) { if (pUnit->u.Drv.pDrvIns == pDrvIns) { /* * Unlink it, advance pointer, and free the node. */ PSSMUNIT pFree = pUnit; pUnit = pUnit->pNext; if (pUnitPrev) pUnitPrev->pNext = pUnit; else pVM->ssm.s.pHead = pUnit; pVM->ssm.s.cUnits--; Log(("SSM: Removed data unit '%s' (pdm drv).\n", pFree->szName)); MMR3HeapFree(pFree); if (pszName) return VINF_SUCCESS; rc = VINF_SUCCESS; continue; } AssertMsgReturn(!pszName, ("Caller is not owner! Owner=%p Caller=%p %s\n", pUnit->u.Drv.pDrvIns, pDrvIns, pszName), VERR_SSM_UNIT_NOT_OWNER); } /* next */ pUnitPrev = pUnit; pUnit = pUnit->pNext; } return rc; } /** * Deregister a data unit. * * @returns VBox status. * @param pVM Pointer to the VM. * @param enmType Unit type * @param pszName Data unit name. * @remark Only for dynamic data units. */ static int ssmR3DeregisterByNameAndType(PVM pVM, const char *pszName, SSMUNITTYPE enmType) { /* * Validate input. */ if (!pszName) { AssertMsgFailed(("pszName is NULL!\n")); return VERR_INVALID_PARAMETER; } /* * Search the list. */ size_t cchName = strlen(pszName); int rc = VERR_SSM_UNIT_NOT_FOUND; PSSMUNIT pUnitPrev = NULL; PSSMUNIT pUnit = pVM->ssm.s.pHead; while (pUnit) { if ( pUnit->enmType == enmType && pUnit->cchName == cchName && !memcmp(pUnit->szName, pszName, cchName)) { /* * Unlink it, advance pointer, and free the node. */ PSSMUNIT pFree = pUnit; pUnit = pUnit->pNext; if (pUnitPrev) pUnitPrev->pNext = pUnit; else pVM->ssm.s.pHead = pUnit; pVM->ssm.s.cUnits--; Log(("SSM: Removed data unit '%s' (type=%d).\n", pFree->szName, enmType)); MMR3HeapFree(pFree); return VINF_SUCCESS; } /* next */ pUnitPrev = pUnit; pUnit = pUnit->pNext; } return rc; } /** * Deregister an internal data unit. * * @returns VBox status. * @param pVM Pointer to the VM. * @param pszName Data unit name. * @remark Only for dynamic data units. */ VMMR3DECL(int) SSMR3DeregisterInternal(PVM pVM, const char *pszName) { return ssmR3DeregisterByNameAndType(pVM, pszName, SSMUNITTYPE_INTERNAL); } /** * Deregister an external data unit. * * @returns VBox status. * @param pVM Pointer to the VM. * @param pszName Data unit name. * @remark Only for dynamic data units. */ VMMR3DECL(int) SSMR3DeregisterExternal(PUVM pUVM, const char *pszName) { UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE); PVM pVM = pUVM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); return ssmR3DeregisterByNameAndType(pVM, pszName, SSMUNITTYPE_EXTERNAL); } #endif /* !SSM_STANDALONE */ /** * Initializes the stream after/before opening the file/whatever. * * @returns VINF_SUCCESS or VERR_NO_MEMORY. * @param pStrm The stream handle. * @param fChecksummed Whether the stream is to be checksummed while * written/read. * @param cBuffers The number of buffers. */ static int ssmR3StrmInitInternal(PSSMSTRM pStrm, bool fChecksummed, uint32_t cBuffers) { Assert(cBuffers > 0); /* * Init the common data members. */ pStrm->fTerminating = false; pStrm->fNeedSeek = false; pStrm->rc = VINF_SUCCESS; pStrm->hIoThread = NIL_RTTHREAD; pStrm->offNeedSeekTo= UINT64_MAX; pStrm->pHead = NULL; pStrm->pFree = NULL; pStrm->hEvtHead = NIL_RTSEMEVENT; pStrm->hEvtFree = NIL_RTSEMEVENT; pStrm->pPending = NULL; pStrm->pCur = NULL; pStrm->offCurStream = 0; pStrm->off = 0; pStrm->fChecksummed = fChecksummed; pStrm->u32StreamCRC = fChecksummed ? RTCrc32Start() : 0; pStrm->offStreamCRC = 0; /* * Allocate the buffers. Page align them in case that makes the kernel * and/or cpu happier in some way. */ int rc = VINF_SUCCESS; for (uint32_t i = 0; i < cBuffers; i++) { PSSMSTRMBUF pBuf = (PSSMSTRMBUF)RTMemPageAllocZ(sizeof(*pBuf)); if (!pBuf) { if (i > 2) { LogRel(("ssmR3StrmAllocBuffer: WARNING: Could only get %d stream buffers.\n", i)); break; } LogRel(("ssmR3StrmAllocBuffer: Failed to allocate stream buffers. (i=%d)\n", i)); return VERR_NO_MEMORY; } /* link it */ pBuf->pNext = pStrm->pFree; pStrm->pFree = pBuf; } /* * Create the event semaphores. */ rc = RTSemEventCreate(&pStrm->hEvtHead); if (RT_FAILURE(rc)) return rc; rc = RTSemEventCreate(&pStrm->hEvtFree); if (RT_FAILURE(rc)) return rc; return VINF_SUCCESS; } /** * Destroys a list of buffers. * * @param pHead Pointer to the head. */ static void ssmR3StrmDestroyBufList(PSSMSTRMBUF pHead) { while (pHead) { PSSMSTRMBUF pCur = pHead; pHead = pCur->pNext; pCur->pNext = NULL; RTMemPageFree(pCur, sizeof(*pCur)); } } /** * Cleans up a stream after ssmR3StrmInitInternal has been called (regardless of * it succeeded or not). * * @param pStrm The stream handle. */ static void ssmR3StrmDelete(PSSMSTRM pStrm) { RTMemPageFree(pStrm->pCur, sizeof(*pStrm->pCur)); pStrm->pCur = NULL; ssmR3StrmDestroyBufList(pStrm->pHead); pStrm->pHead = NULL; ssmR3StrmDestroyBufList(pStrm->pPending); pStrm->pPending = NULL; ssmR3StrmDestroyBufList(pStrm->pFree); pStrm->pFree = NULL; RTSemEventDestroy(pStrm->hEvtHead); pStrm->hEvtHead = NIL_RTSEMEVENT; RTSemEventDestroy(pStrm->hEvtFree); pStrm->hEvtFree = NIL_RTSEMEVENT; } /** * Initializes a stream that uses a method table. * * @returns VBox status code. * @param pStrm The stream manager structure. * @param pStreamOps The stream method table. * @param pvUser The user argument for the stream methods. * @param fWrite Whether to open for writing or reading. * @param fChecksummed Whether the stream is to be checksummed while * written/read. * @param cBuffers The number of buffers. */ static int ssmR3StrmInit(PSSMSTRM pStrm, PCSSMSTRMOPS pStreamOps, void *pvUser, bool fWrite, bool fChecksummed, uint32_t cBuffers) { int rc = ssmR3StrmInitInternal(pStrm, fChecksummed, cBuffers); if (RT_SUCCESS(rc)) { pStrm->pOps = pStreamOps; pStrm->pvUser = pvUser; pStrm->fWrite = fWrite; return VINF_SUCCESS; } ssmR3StrmDelete(pStrm); pStrm->rc = rc; return rc; } /** * @copydoc SSMSTRMOPS::pfnWrite */ static DECLCALLBACK(int) ssmR3FileWrite(void *pvUser, uint64_t offStream, const void *pvBuf, size_t cbToWrite) { Assert(RTFileTell((RTFILE)(uintptr_t)pvUser) == offStream); NOREF(offStream); return RTFileWriteAt((RTFILE)(uintptr_t)pvUser, offStream, pvBuf, cbToWrite, NULL); /** @todo use RTFileWrite */ } /** * @copydoc SSMSTRMOPS::pfnRead */ static DECLCALLBACK(int) ssmR3FileRead(void *pvUser, uint64_t offStream, void *pvBuf, size_t cbToRead, size_t *pcbRead) { Assert(RTFileTell((RTFILE)(uintptr_t)pvUser) == offStream); NOREF(offStream); return RTFileRead((RTFILE)(uintptr_t)pvUser, pvBuf, cbToRead, pcbRead); } /** * @copydoc SSMSTRMOPS::pfnSeek */ static DECLCALLBACK(int) ssmR3FileSeek(void *pvUser, int64_t offSeek, unsigned uMethod, uint64_t *poffActual) { return RTFileSeek((RTFILE)(uintptr_t)pvUser, offSeek, uMethod, poffActual); } /** * @copydoc SSMSTRMOPS::pfnTell */ static DECLCALLBACK(uint64_t) ssmR3FileTell(void *pvUser) { return RTFileTell((RTFILE)(uintptr_t)pvUser); } /** * @copydoc SSMSTRMOPS::pfnSize */ static DECLCALLBACK(int) ssmR3FileSize(void *pvUser, uint64_t *pcb) { return RTFileGetSize((RTFILE)(uintptr_t)pvUser, pcb); } /** * @copydoc SSMSTRMOPS::pfnIsOk */ static DECLCALLBACK(int) ssmR3FileIsOk(void *pvUser) { /* * Check that there is still some space left on the disk. */ RTFOFF cbFree; int rc = RTFileQueryFsSizes((RTFILE)(uintptr_t)pvUser, NULL, &cbFree, NULL, NULL); #define SSM_MIN_DISK_FREE ((RTFOFF)( 10 * _1M )) if (RT_SUCCESS(rc)) { if (cbFree < SSM_MIN_DISK_FREE) { LogRel(("SSM: Giving up: Low on disk space. (cbFree=%RTfoff, SSM_MIN_DISK_FREE=%RTfoff).\n", cbFree, SSM_MIN_DISK_FREE)); rc = VERR_SSM_LOW_ON_DISK_SPACE; } } else if (rc == VERR_NOT_SUPPORTED) rc = VINF_SUCCESS; else AssertLogRelRC(rc); return rc; } /** * @copydoc SSMSTRMOPS::pfnClose */ static DECLCALLBACK(int) ssmR3FileClose(void *pvUser, bool fCancelled) { NOREF(fCancelled); return RTFileClose((RTFILE)(uintptr_t)pvUser); } /** * Method table for a file based stream. */ static SSMSTRMOPS const g_ssmR3FileOps = { SSMSTRMOPS_VERSION, ssmR3FileWrite, ssmR3FileRead, ssmR3FileSeek, ssmR3FileTell, ssmR3FileSize, ssmR3FileIsOk, ssmR3FileClose, SSMSTRMOPS_VERSION }; /** * Opens a file stream. * * @returns VBox status code. * @param pStrm The stream manager structure. * @param pszFilename The file to open or create. * @param fWrite Whether to open for writing or reading. * @param fChecksummed Whether the stream is to be checksummed while * written/read. * @param cBuffers The number of buffers. */ static int ssmR3StrmOpenFile(PSSMSTRM pStrm, const char *pszFilename, bool fWrite, bool fChecksummed, uint32_t cBuffers) { int rc = ssmR3StrmInitInternal(pStrm, fChecksummed, cBuffers); if (RT_SUCCESS(rc)) { uint32_t fFlags = fWrite ? RTFILE_O_READWRITE | RTFILE_O_CREATE_REPLACE | RTFILE_O_DENY_WRITE : RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_WRITE; RTFILE hFile; rc = RTFileOpen(&hFile, pszFilename, fFlags); if (RT_SUCCESS(rc)) { pStrm->pOps = &g_ssmR3FileOps; pStrm->pvUser = (void *)(uintptr_t)hFile; pStrm->fWrite = fWrite; return VINF_SUCCESS; } } ssmR3StrmDelete(pStrm); pStrm->rc = rc; return rc; } /** * Raise an error condition on the stream. * * @returns true if we raised the error condition, false if the stream already * had an error condition set. * * @param pStrm The stream handle. * @param rc The VBox error status code. * * @thread Any. */ DECLINLINE(bool) ssmR3StrmSetError(PSSMSTRM pStrm, int rc) { Assert(RT_FAILURE_NP(rc)); return ASMAtomicCmpXchgS32(&pStrm->rc, rc, VINF_SUCCESS); } /** * Puts a buffer into the free list. * * @param pStrm The stream handle. * @param pBuf The buffer. * * @thread The consumer. */ static void ssmR3StrmPutFreeBuf(PSSMSTRM pStrm, PSSMSTRMBUF pBuf) { for (;;) { PSSMSTRMBUF pCurFreeHead = ASMAtomicUoReadPtrT(&pStrm->pFree, PSSMSTRMBUF); ASMAtomicUoWritePtr(&pBuf->pNext, pCurFreeHead); if (ASMAtomicCmpXchgPtr(&pStrm->pFree, pBuf, pCurFreeHead)) { int rc = RTSemEventSignal(pStrm->hEvtFree); AssertRC(rc); return; } } } /** * Gets a free buffer, waits for one if necessary. * * @returns Pointer to the buffer on success. NULL if we're terminating. * @param pStrm The stream handle. * * @thread The producer. */ static PSSMSTRMBUF ssmR3StrmGetFreeBuf(PSSMSTRM pStrm) { for (;;) { PSSMSTRMBUF pMine = ASMAtomicUoReadPtrT(&pStrm->pFree, PSSMSTRMBUF); if (!pMine) { if (pStrm->fTerminating) return NULL; if (RT_FAILURE(pStrm->rc)) return NULL; if ( pStrm->fWrite && pStrm->hIoThread == NIL_RTTHREAD) { int rc = ssmR3StrmWriteBuffers(pStrm); if (RT_FAILURE(rc)) return NULL; } int rc = RTSemEventWaitNoResume(pStrm->hEvtFree, 30000); if ( rc == VERR_SEM_DESTROYED || pStrm->fTerminating) return NULL; continue; } if (ASMAtomicCmpXchgPtr(&pStrm->pFree, pMine->pNext, pMine)) { pMine->offStream = UINT64_MAX; pMine->cb = 0; pMine->pNext = NULL; pMine->fEndOfStream = false; pMine->NanoTS = RTTimeNanoTS(); return pMine; } } } /** * Puts a buffer onto the queue. * * @param pBuf The buffer. * * @thread The producer. */ static void ssmR3StrmPutBuf(PSSMSTRM pStrm, PSSMSTRMBUF pBuf) { for (;;) { PSSMSTRMBUF pCurHead = ASMAtomicUoReadPtrT(&pStrm->pHead, PSSMSTRMBUF); ASMAtomicUoWritePtr(&pBuf->pNext, pCurHead); if (ASMAtomicCmpXchgPtr(&pStrm->pHead, pBuf, pCurHead)) { int rc = RTSemEventSignal(pStrm->hEvtHead); AssertRC(rc); return; } } } /** * Reverses the list. * * @returns The head of the reversed list. * @param pHead The head of the list to reverse. */ static PSSMSTRMBUF ssmR3StrmReverseList(PSSMSTRMBUF pHead) { PSSMSTRMBUF pRevHead = NULL; while (pHead) { PSSMSTRMBUF pCur = pHead; pHead = pCur->pNext; pCur->pNext = pRevHead; pRevHead = pCur; } return pRevHead; } /** * Gets one buffer from the queue, will wait for one to become ready if * necessary. * * @returns Pointer to the buffer on success. NULL if we're terminating. * @param pBuf The buffer. * * @thread The consumer. */ static PSSMSTRMBUF ssmR3StrmGetBuf(PSSMSTRM pStrm) { for (;;) { PSSMSTRMBUF pMine = pStrm->pPending; if (pMine) { pStrm->pPending = pMine->pNext; pMine->pNext = NULL; return pMine; } pMine = ASMAtomicXchgPtrT(&pStrm->pHead, NULL, PSSMSTRMBUF); if (pMine) pStrm->pPending = ssmR3StrmReverseList(pMine); else { if (pStrm->fTerminating) return NULL; if (RT_FAILURE(pStrm->rc)) return NULL; if ( !pStrm->fWrite && pStrm->hIoThread == NIL_RTTHREAD) { int rc = ssmR3StrmReadMore(pStrm); if (RT_FAILURE(rc)) return NULL; continue; } int rc = RTSemEventWaitNoResume(pStrm->hEvtHead, 30000); if ( rc == VERR_SEM_DESTROYED || pStrm->fTerminating) return NULL; } } } /** * Flushes the current buffer (both write and read streams). * * @param pStrm The stream handle. */ static void ssmR3StrmFlushCurBuf(PSSMSTRM pStrm) { if (pStrm->pCur) { PSSMSTRMBUF pBuf = pStrm->pCur; pStrm->pCur = NULL; if (pStrm->fWrite) { uint32_t cb = pStrm->off; pBuf->cb = cb; pBuf->offStream = pStrm->offCurStream; if ( pStrm->fChecksummed && pStrm->offStreamCRC < cb) pStrm->u32StreamCRC = RTCrc32Process(pStrm->u32StreamCRC, &pBuf->abData[pStrm->offStreamCRC], cb - pStrm->offStreamCRC); pStrm->offCurStream += cb; pStrm->off = 0; pStrm->offStreamCRC = 0; ssmR3StrmPutBuf(pStrm, pBuf); } else { uint32_t cb = pBuf->cb; if ( pStrm->fChecksummed && pStrm->offStreamCRC < cb) pStrm->u32StreamCRC = RTCrc32Process(pStrm->u32StreamCRC, &pBuf->abData[pStrm->offStreamCRC], cb - pStrm->offStreamCRC); pStrm->offCurStream += cb; pStrm->off = 0; pStrm->offStreamCRC = 0; ssmR3StrmPutFreeBuf(pStrm, pBuf); } } } /** * Flush buffered data. * * @returns VBox status code. Returns VINF_EOF if we encounter a buffer with the * fEndOfStream indicator set. * @param pStrm The stream handle. * * @thread The producer thread. */ static int ssmR3StrmWriteBuffers(PSSMSTRM pStrm) { Assert(pStrm->fWrite); /* * Just return if the stream has a pending error condition. */ int rc = pStrm->rc; if (RT_FAILURE(rc)) return rc; /* * Grab the pending list and write it out. */ PSSMSTRMBUF pHead = ASMAtomicXchgPtrT(&pStrm->pHead, NULL, PSSMSTRMBUF); if (!pHead) return VINF_SUCCESS; pHead = ssmR3StrmReverseList(pHead); while (pHead) { /* pop */ PSSMSTRMBUF pCur = pHead; pHead = pCur->pNext; /* flush */ rc = pStrm->pOps->pfnIsOk(pStrm->pvUser); if (RT_SUCCESS(rc)) rc = pStrm->pOps->pfnWrite(pStrm->pvUser, pCur->offStream, &pCur->abData[0], pCur->cb); if ( RT_FAILURE(rc) && ssmR3StrmSetError(pStrm, rc)) LogRel(("ssmR3StrmWriteBuffers: Write failed with rc=%Rrc at offStream=%#llx\n", rc, pCur->offStream)); /* free */ bool fEndOfStream = pCur->fEndOfStream; ssmR3StrmPutFreeBuf(pStrm, pCur); if (fEndOfStream) { Assert(!pHead); return VINF_EOF; } } return pStrm->rc; } /** * Closes the stream after first flushing any pending write. * * @returns VBox status code. * @param pStrm The stream handle. * @param fCancelled Indicates whether the operation was cancelled or * not. */ static int ssmR3StrmClose(PSSMSTRM pStrm, bool fCancelled) { /* * Flush, terminate the I/O thread, and close the stream. */ if (pStrm->fWrite) { ssmR3StrmFlushCurBuf(pStrm); if (pStrm->hIoThread == NIL_RTTHREAD) ssmR3StrmWriteBuffers(pStrm); } if (pStrm->hIoThread != NIL_RTTHREAD) ASMAtomicWriteBool(&pStrm->fTerminating, true); int rc; if (pStrm->fWrite) { if (pStrm->hIoThread != NIL_RTTHREAD) { int rc2 = RTSemEventSignal(pStrm->hEvtHead); AssertLogRelRC(rc2); int rc3 = RTThreadWait(pStrm->hIoThread, RT_INDEFINITE_WAIT, NULL); AssertLogRelRC(rc3); pStrm->hIoThread = NIL_RTTHREAD; } rc = pStrm->pOps->pfnClose(pStrm->pvUser, fCancelled); if (RT_FAILURE(rc)) ssmR3StrmSetError(pStrm, rc); } else { rc = pStrm->pOps->pfnClose(pStrm->pvUser, fCancelled); if (RT_FAILURE(rc)) ssmR3StrmSetError(pStrm, rc); if (pStrm->hIoThread != NIL_RTTHREAD) { int rc2 = RTSemEventSignal(pStrm->hEvtFree); AssertLogRelRC(rc2); int rc3 = RTThreadWait(pStrm->hIoThread, RT_INDEFINITE_WAIT, NULL); AssertLogRelRC(rc3); pStrm->hIoThread = NIL_RTTHREAD; } } pStrm->pOps = NULL; pStrm->pvUser = NULL; rc = pStrm->rc; ssmR3StrmDelete(pStrm); return rc; } #ifndef SSM_STANDALONE /** * Stream output routine. * * @returns VBox status code. * @param pStrm The stream handle. * @param pvBuf What to write. * @param cbToWrite How much to write. * * @thread The producer in a write stream (never the I/O thread). */ static int ssmR3StrmWrite(PSSMSTRM pStrm, const void *pvBuf, size_t cbToWrite) { AssertReturn(cbToWrite > 0, VINF_SUCCESS); Assert(pStrm->fWrite); /* * Squeeze as much as possible into the current buffer. */ PSSMSTRMBUF pBuf = pStrm->pCur; if (RT_LIKELY(pBuf)) { uint32_t cbLeft = RT_SIZEOFMEMB(SSMSTRMBUF, abData) - pStrm->off; if (RT_LIKELY(cbLeft >= cbToWrite)) { memcpy(&pBuf->abData[pStrm->off], pvBuf, cbToWrite); pStrm->off += (uint32_t)cbToWrite; return VINF_SUCCESS; } if (cbLeft > 0) { memcpy(&pBuf->abData[pStrm->off], pvBuf, cbLeft); pStrm->off += cbLeft; cbToWrite -= cbLeft; pvBuf = (uint8_t const *)pvBuf + cbLeft; } Assert(pStrm->off == RT_SIZEOFMEMB(SSMSTRMBUF, abData)); } /* * Need one or more new buffers. */ do { /* * Flush the current buffer and replace it with a new one. */ ssmR3StrmFlushCurBuf(pStrm); pBuf = ssmR3StrmGetFreeBuf(pStrm); if (!pBuf) break; pStrm->pCur = pBuf; Assert(pStrm->off == 0); /* * Copy data to the buffer. */ uint32_t cbCopy = RT_SIZEOFMEMB(SSMSTRMBUF, abData); if (cbCopy > cbToWrite) cbCopy = (uint32_t)cbToWrite; memcpy(&pBuf->abData[0], pvBuf, cbCopy); pStrm->off = cbCopy; cbToWrite -= cbCopy; pvBuf = (uint8_t const *)pvBuf + cbCopy; } while (cbToWrite > 0); return pStrm->rc; } /** * Reserves space in the current buffer so the caller can write directly to the * buffer instead of doing double buffering. * * @returns VBox status code * @param pStrm The stream handle. * @param cb The amount of buffer space to reserve. * @param ppb Where to return the pointer. */ static int ssmR3StrmReserveWriteBufferSpace(PSSMSTRM pStrm, size_t cb, uint8_t **ppb) { Assert(pStrm->fWrite); Assert(RT_SIZEOFMEMB(SSMSTRMBUF, abData) / 4 >= cb); /* * Check if there is room in the current buffer, it not flush it. */ PSSMSTRMBUF pBuf = pStrm->pCur; if (pBuf) { uint32_t cbLeft = RT_SIZEOFMEMB(SSMSTRMBUF, abData) - pStrm->off; if (cbLeft >= cb) { *ppb = &pBuf->abData[pStrm->off]; return VINF_SUCCESS; } ssmR3StrmFlushCurBuf(pStrm); } /* * Get a fresh buffer and return a pointer into it. */ pBuf = ssmR3StrmGetFreeBuf(pStrm); if (pBuf) { pStrm->pCur = pBuf; Assert(pStrm->off == 0); *ppb = &pBuf->abData[0]; } else *ppb = NULL; /* make gcc happy. */ return pStrm->rc; } /** * Commits buffer space reserved by ssmR3StrmReserveWriteBufferSpace. * * @returns VBox status code. * @param pStrm The stream handle. * @param cb The amount of buffer space to commit. This can be less * that what was reserved initially. */ static int ssmR3StrmCommitWriteBufferSpace(PSSMSTRM pStrm, size_t cb) { Assert(pStrm->pCur); Assert(pStrm->off + cb <= RT_SIZEOFMEMB(SSMSTRMBUF, abData)); pStrm->off += (uint32_t)cb; return VINF_SUCCESS; } /** * Marks the end of the stream. * * This will cause the I/O thread to quit waiting for more buffers. * * @returns VBox status code. * @param pStrm The stream handle. */ static int ssmR3StrmSetEnd(PSSMSTRM pStrm) { Assert(pStrm->fWrite); PSSMSTRMBUF pBuf = pStrm->pCur; if (RT_UNLIKELY(!pStrm->pCur)) { pBuf = ssmR3StrmGetFreeBuf(pStrm); if (!pBuf) return pStrm->rc; pStrm->pCur = pBuf; Assert(pStrm->off == 0); } pBuf->fEndOfStream = true; ssmR3StrmFlushCurBuf(pStrm); return VINF_SUCCESS; } #endif /* !SSM_STANDALONE */ /** * Read more from the stream. * * @returns VBox status code. VERR_EOF gets translated into VINF_EOF. * @param pStrm The stream handle. * * @thread The I/O thread when we got one, otherwise the stream user. */ static int ssmR3StrmReadMore(PSSMSTRM pStrm) { int rc; Log6(("ssmR3StrmReadMore:\n")); /* * Undo seek done by ssmR3StrmPeekAt. */ if (pStrm->fNeedSeek) { rc = pStrm->pOps->pfnSeek(pStrm->pvUser, pStrm->offNeedSeekTo, RTFILE_SEEK_BEGIN, NULL); if (RT_FAILURE(rc)) { if (ssmR3StrmSetError(pStrm, rc)) LogRel(("ssmR3StrmReadMore: RTFileSeek(,%#llx,) failed with rc=%Rrc\n", pStrm->offNeedSeekTo, rc)); return rc; } pStrm->fNeedSeek = false; pStrm->offNeedSeekTo = UINT64_MAX; } /* * Get a free buffer and try fill it up. */ PSSMSTRMBUF pBuf = ssmR3StrmGetFreeBuf(pStrm); if (!pBuf) return pStrm->rc; pBuf->offStream = pStrm->pOps->pfnTell(pStrm->pvUser); size_t cbRead = sizeof(pBuf->abData); rc = pStrm->pOps->pfnRead(pStrm->pvUser, pBuf->offStream, &pBuf->abData[0], cbRead, &cbRead); if ( RT_SUCCESS(rc) && cbRead > 0) { pBuf->cb = (uint32_t)cbRead; pBuf->fEndOfStream = false; Log6(("ssmR3StrmReadMore: %#010llx %#x\n", pBuf->offStream, pBuf->cb)); ssmR3StrmPutBuf(pStrm, pBuf); } else if ( ( RT_SUCCESS_NP(rc) && cbRead == 0) || rc == VERR_EOF) { pBuf->cb = 0; pBuf->fEndOfStream = true; Log6(("ssmR3StrmReadMore: %#010llx 0 EOF!\n", pBuf->offStream)); ssmR3StrmPutBuf(pStrm, pBuf); rc = VINF_EOF; } else { Log6(("ssmR3StrmReadMore: %#010llx rc=%Rrc!\n", pBuf->offStream, rc)); if (ssmR3StrmSetError(pStrm, rc)) LogRel(("ssmR3StrmReadMore: RTFileRead(,,%#x,) -> %Rrc at offset %#llx\n", sizeof(pBuf->abData), rc, pBuf->offStream)); ssmR3StrmPutFreeBuf(pStrm, pBuf); } return rc; } /** * Stream input routine. * * @returns VBox status code. * @param pStrm The stream handle. * @param pvBuf Where to put what we read. * @param cbToRead How much to read. */ static int ssmR3StrmRead(PSSMSTRM pStrm, void *pvBuf, size_t cbToRead) { AssertReturn(cbToRead > 0, VINF_SUCCESS); Assert(!pStrm->fWrite); /* * Read from the current buffer if we got one. */ PSSMSTRMBUF pBuf = pStrm->pCur; if (RT_LIKELY(pBuf)) { Assert(pStrm->off <= pBuf->cb); uint32_t cbLeft = pBuf->cb - pStrm->off; if (cbLeft >= cbToRead) { memcpy(pvBuf, &pBuf->abData[pStrm->off], cbToRead); pStrm->off += (uint32_t)cbToRead; Assert(pStrm->off <= pBuf->cb); return VINF_SUCCESS; } if (cbLeft) { memcpy(pvBuf, &pBuf->abData[pStrm->off], cbLeft); pStrm->off += cbLeft; cbToRead -= cbLeft; pvBuf = (uint8_t *)pvBuf + cbLeft; } else if (pBuf->fEndOfStream) return VERR_EOF; Assert(pStrm->off == pBuf->cb); } /* * Get more buffers from the stream. */ int rc = VINF_SUCCESS; do { /* * Check for EOF first - never flush the EOF buffer. */ if ( pBuf && pBuf->fEndOfStream) return VERR_EOF; /* * Flush the current buffer and get the next one. */ ssmR3StrmFlushCurBuf(pStrm); pBuf = ssmR3StrmGetBuf(pStrm); if (!pBuf) { rc = pStrm->rc; break; } pStrm->pCur = pBuf; Assert(pStrm->off == 0); Assert(pStrm->offCurStream == pBuf->offStream); if (!pBuf->cb) { Assert(pBuf->fEndOfStream); return VERR_EOF; } /* * Read data from the buffer. */ uint32_t cbCopy = pBuf->cb; if (cbCopy > cbToRead) cbCopy = (uint32_t)cbToRead; memcpy(pvBuf, &pBuf->abData[0], cbCopy); pStrm->off = cbCopy; cbToRead -= cbCopy; pvBuf = (uint8_t *)pvBuf + cbCopy; Assert(!pStrm->pCur || pStrm->off <= pStrm->pCur->cb); } while (cbToRead > 0); return rc; } /** * Reads data from the stream but instead of copying it to some output buffer * the caller gets a pointer to into the current stream buffer. * * The returned pointer becomes invalid after the next stream operation! * * @returns Pointer to the read data residing in the stream buffer. NULL is * returned if the request amount of data isn't available in the * buffer. The caller must fall back on ssmR3StrmRead when this * happens. * * @param pStrm The stream handle. * @param cbToRead The number of bytes to tread. */ static uint8_t const *ssmR3StrmReadDirect(PSSMSTRM pStrm, size_t cbToRead) { AssertReturn(cbToRead > 0, VINF_SUCCESS); Assert(!pStrm->fWrite); /* * Too lazy to fetch more data for the odd case that we're * exactly at the boundary between two buffers. */ PSSMSTRMBUF pBuf = pStrm->pCur; if (RT_LIKELY(pBuf)) { Assert(pStrm->off <= pBuf->cb); uint32_t cbLeft = pBuf->cb - pStrm->off; if (cbLeft >= cbToRead) { uint8_t const *pb = &pBuf->abData[pStrm->off]; pStrm->off += (uint32_t)cbToRead; Assert(pStrm->off <= pBuf->cb); return pb; } } return NULL; } #ifndef SSM_STANDALONE /** * Check that the stream is OK and flush data that is getting old * * The checking is mainly for testing for cancellation and out of space * conditions. * * @returns VBox status code. * @param pStrm The stream handle. */ static int ssmR3StrmCheckAndFlush(PSSMSTRM pStrm) { int rc = pStrm->pOps->pfnIsOk(pStrm->pvUser); if (RT_FAILURE(rc)) return rc; if ( pStrm->fWrite && pStrm->hIoThread != NIL_RTTHREAD && !pStrm->pHead /* the worker is probably idle */ && pStrm->pCur && RTTimeNanoTS() - pStrm->pCur->NanoTS > 500*1000*1000 /* 0.5s */ ) ssmR3StrmFlushCurBuf(pStrm); return VINF_SUCCESS; } #endif /* !SSM_STANDALONE */ /** * Tell current stream position. * * @returns stream position. * @param pStrm The stream handle. */ static uint64_t ssmR3StrmTell(PSSMSTRM pStrm) { return pStrm->offCurStream + pStrm->off; } /** * Gets the intermediate stream CRC up to the current position. * * @returns CRC. * @param pStrm The stream handle. */ static uint32_t ssmR3StrmCurCRC(PSSMSTRM pStrm) { if (!pStrm->fChecksummed) return 0; if (pStrm->offStreamCRC < pStrm->off) { PSSMSTRMBUF pBuf = pStrm->pCur; Assert(pBuf); pStrm->u32StreamCRC = RTCrc32Process(pStrm->u32StreamCRC, &pBuf->abData[pStrm->offStreamCRC], pStrm->off - pStrm->offStreamCRC); pStrm->offStreamCRC = pStrm->off; } else Assert(pStrm->offStreamCRC == pStrm->off); return pStrm->u32StreamCRC; } /** * Gets the final stream CRC up to the current position. * * @returns CRC. * @param pStrm The stream handle. */ static uint32_t ssmR3StrmFinalCRC(PSSMSTRM pStrm) { if (!pStrm->fChecksummed) return 0; return RTCrc32Finish(ssmR3StrmCurCRC(pStrm)); } /** * Disables checksumming of the stream. * * @param pStrm The stream handle. */ static void ssmR3StrmDisableChecksumming(PSSMSTRM pStrm) { pStrm->fChecksummed = false; } /** * Used by SSMR3Seek to position the stream at the new unit. * * @returns VBox status code. * @param pStrm The strem handle. * @param off The seek offset. * @param uMethod The seek method. * @param u32CurCRC The current CRC at the seek position. */ static int ssmR3StrmSeek(PSSMSTRM pStrm, int64_t off, uint32_t uMethod, uint32_t u32CurCRC) { AssertReturn(!pStrm->fWrite, VERR_NOT_SUPPORTED); AssertReturn(pStrm->hIoThread == NIL_RTTHREAD, VERR_WRONG_ORDER); uint64_t offStream; int rc = pStrm->pOps->pfnSeek(pStrm->pvUser, off, uMethod, &offStream); if (RT_SUCCESS(rc)) { pStrm->fNeedSeek = false; pStrm->offNeedSeekTo= UINT64_MAX; pStrm->offCurStream = offStream; pStrm->off = 0; pStrm->offStreamCRC = 0; if (pStrm->fChecksummed) pStrm->u32StreamCRC = u32CurCRC; if (pStrm->pCur) { ssmR3StrmPutFreeBuf(pStrm, pStrm->pCur); pStrm->pCur = NULL; } } return rc; } #ifndef SSM_STANDALONE /** * Skip some bytes in the stream. * * This is only used if someone didn't read all of their data in the V1 format, * so don't bother making this very efficient yet. * * @returns VBox status code. * @param pStrm The stream handle. * @param offDst The destination offset. */ static int ssmR3StrmSkipTo(PSSMSTRM pStrm, uint64_t offDst) { /* dead simple - lazy bird! */ for (;;) { uint64_t offCur = ssmR3StrmTell(pStrm); AssertReturn(offCur <= offDst, VERR_SSM_SKIP_BACKWARDS); if (offCur == offDst) return VINF_SUCCESS; uint8_t abBuf[4096]; size_t cbToRead = RT_MIN(sizeof(abBuf), offDst - offCur); int rc = ssmR3StrmRead(pStrm, abBuf, cbToRead); if (RT_FAILURE(rc)) return rc; } } #endif /* !SSM_STANDALONE */ /** * Get the size of the file. * * This does not work for non-file streams! * * @returns The file size, or UINT64_MAX if not a file stream. * @param pStrm The stream handle. */ static uint64_t ssmR3StrmGetSize(PSSMSTRM pStrm) { uint64_t cbFile; int rc = pStrm->pOps->pfnSize(pStrm->pvUser, &cbFile); AssertLogRelRCReturn(rc, UINT64_MAX); return cbFile; } /*** * Tests if the stream is a file stream or not. * * @returns true / false. * @param pStrm The stream handle. */ static bool ssmR3StrmIsFile(PSSMSTRM pStrm) { return pStrm->pOps == &g_ssmR3FileOps; } /** * Peeks at data in a file stream without buffering anything (or upsetting * the buffering for that matter). * * @returns VBox status code. * @param pStrm The stream handle * @param off The offset to start peeking at. Use a negative offset to * peek at something relative to the end of the file. * @param pvBuf Output buffer. * @param cbToRead How much to read. * @param poff Where to optionally store the position. Useful when * using a negative off. * * @remarks Failures occurring while peeking will not be raised on the stream. */ static int ssmR3StrmPeekAt(PSSMSTRM pStrm, RTFOFF off, void *pvBuf, size_t cbToRead, uint64_t *poff) { AssertReturn(!pStrm->fWrite, VERR_NOT_SUPPORTED); AssertReturn(pStrm->hIoThread == NIL_RTTHREAD, VERR_WRONG_ORDER); if (!pStrm->fNeedSeek) { pStrm->fNeedSeek = true; pStrm->offNeedSeekTo = pStrm->offCurStream + (pStrm->pCur ? pStrm->pCur->cb : 0); } uint64_t offActual; int rc = pStrm->pOps->pfnSeek(pStrm->pvUser, off, off >= 0 ? RTFILE_SEEK_BEGIN : RTFILE_SEEK_END, &offActual); if (RT_SUCCESS(rc)) { if (poff) *poff = offActual; rc = pStrm->pOps->pfnRead(pStrm->pvUser, offActual, pvBuf, cbToRead, NULL); } return rc; } #ifndef SSM_STANDALONE /** * The I/O thread. * * @returns VINF_SUCCESS (ignored). * @param hSelf The thread handle. * @param pvStrm The stream handle. */ static DECLCALLBACK(int) ssmR3StrmIoThread(RTTHREAD hSelf, void *pvStrm) { PSSMSTRM pStrm = (PSSMSTRM)pvStrm; ASMAtomicWriteHandle(&pStrm->hIoThread, hSelf); /* paranoia */ Log(("ssmR3StrmIoThread: starts working\n")); if (pStrm->fWrite) { /* * Write until error or terminated. */ for (;;) { int rc = ssmR3StrmWriteBuffers(pStrm); if ( RT_FAILURE(rc) || rc == VINF_EOF) { Log(("ssmR3StrmIoThread: quitting writing with rc=%Rrc.\n", rc)); break; } if (RT_FAILURE(pStrm->rc)) { Log(("ssmR3StrmIoThread: quitting writing with stream rc=%Rrc\n", pStrm->rc)); break; } if (ASMAtomicReadBool(&pStrm->fTerminating)) { if (!ASMAtomicReadPtrT(&pStrm->pHead, PSSMSTRMBUF)) { Log(("ssmR3StrmIoThread: quitting writing because of pending termination.\n")); break; } Log(("ssmR3StrmIoThread: postponing termination because of pending buffers.\n")); } else if (!ASMAtomicReadPtrT(&pStrm->pHead, PSSMSTRMBUF)) { rc = RTSemEventWait(pStrm->hEvtHead, RT_INDEFINITE_WAIT); AssertLogRelRC(rc); } } if (!ASMAtomicReadBool(&pStrm->fTerminating)) RTSemEventSignal(pStrm->hEvtFree); } else { /* * Read until end of file, error or termination. */ for (;;) { if (ASMAtomicReadBool(&pStrm->fTerminating)) { Log(("ssmR3StrmIoThread: quitting reading because of pending termination.\n")); break; } int rc = ssmR3StrmReadMore(pStrm); if ( RT_FAILURE(rc) || rc == VINF_EOF) { Log(("ssmR3StrmIoThread: quitting reading with rc=%Rrc\n", rc)); break; } if (RT_FAILURE(pStrm->rc)) { Log(("ssmR3StrmIoThread: quitting reading with stream rc=%Rrc\n", pStrm->rc)); break; } } if (!ASMAtomicReadBool(&pStrm->fTerminating)) RTSemEventSignal(pStrm->hEvtHead); } return VINF_SUCCESS; } /** * Starts the I/O thread for the specified stream. * * @param pStrm The stream handle. */ static void ssmR3StrmStartIoThread(PSSMSTRM pStrm) { Assert(pStrm->hIoThread == NIL_RTTHREAD); RTTHREAD hThread; int rc = RTThreadCreate(&hThread, ssmR3StrmIoThread, pStrm, 0, RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "SSM-IO"); AssertRCReturnVoid(rc); ASMAtomicWriteHandle(&pStrm->hIoThread, hThread); /* paranoia */ } #endif /* !SSM_STANDALONE */ /** * Works the progress calculation for non-live saves and restores. * * @param pSSM The SSM handle. * @param cbAdvance Number of bytes to advance (with in the current unit). */ static void ssmR3ProgressByByte(PSSMHANDLE pSSM, uint64_t cbAdvance) { if (!pSSM->fLiveSave) { /* Can't advance it beyond the estimated end of the unit. */ uint64_t cbLeft = pSSM->offEstUnitEnd - pSSM->offEst; if (cbAdvance > cbLeft) cbAdvance = cbLeft; pSSM->offEst += cbAdvance; /* uPercentPrepare% prepare, xx% exec, uPercentDone% done+crc. This is not quite right for live save, but the non-live stage there is very short. */ while ( pSSM->offEst >= pSSM->offEstProgress && pSSM->uPercent <= 100 - pSSM->uPercentDone) { if (pSSM->pfnProgress) pSSM->pfnProgress(pSSM->pVM->pUVM, pSSM->uPercent, pSSM->pvUser); pSSM->uPercent++; pSSM->offEstProgress = (pSSM->uPercent - pSSM->uPercentPrepare - pSSM->uPercentLive) * pSSM->cbEstTotal / (100 - pSSM->uPercentDone - pSSM->uPercentPrepare - pSSM->uPercentLive); } } } #ifndef SSM_STANDALONE /** * Makes the SSM operation cancellable or not (via SSMR3Cancel). * * @param pVM Pointer to the VM. * @param pSSM The saved state handle. (SSMHANDLE::rc may be set.) * @param fCancellable The new state. */ static void ssmR3SetCancellable(PVM pVM, PSSMHANDLE pSSM, bool fCancellable) { RTCritSectEnter(&pVM->ssm.s.CancelCritSect); if (fCancellable) { Assert(!pVM->ssm.s.pSSM); pVM->ssm.s.pSSM = pSSM; } else { if (pVM->ssm.s.pSSM == pSSM) pVM->ssm.s.pSSM = NULL; uint32_t fCancelled = ASMAtomicUoReadU32(&pSSM->fCancelled); if ( fCancelled == SSMHANDLE_CANCELLED && RT_SUCCESS(pSSM->rc)) pSSM->rc = VERR_SSM_CANCELLED; } RTCritSectLeave(&pVM->ssm.s.CancelCritSect); } #endif /* !SSM_STANDALONE */ /** * Gets the host bit count of the saved state. * * Works for on both save and load handles. * * @returns 32 or 64. * @param pSSM The saved state handle. */ DECLINLINE(uint32_t) ssmR3GetHostBits(PSSMHANDLE pSSM) { if (pSSM->enmOp >= SSMSTATE_LOAD_PREP) { uint32_t cBits = pSSM->u.Read.cHostBits; if (cBits) return cBits; } return HC_ARCH_BITS; } /** * Saved state origins on a host using 32-bit MSC? * * Works for on both save and load handles. * * @returns true/false. * @param pSSM The saved state handle. */ DECLINLINE(bool) ssmR3IsHostMsc32(PSSMHANDLE pSSM) { if (pSSM->enmOp >= SSMSTATE_LOAD_PREP) return pSSM->u.Read.fIsHostMsc32; return SSM_HOST_IS_MSC_32; } #ifndef SSM_STANDALONE /** * Finishes a data unit. * All buffers and compressor instances are flushed and destroyed. * * @returns VBox status. * @param pSSM The saved state handle. */ static int ssmR3DataWriteFinish(PSSMHANDLE pSSM) { //Log2(("ssmR3DataWriteFinish: %#010llx start\n", ssmR3StrmTell(&pSSM->Strm))); int rc = ssmR3DataFlushBuffer(pSSM); if (RT_SUCCESS(rc)) { pSSM->offUnit = UINT64_MAX; pSSM->offUnitUser = UINT64_MAX; return VINF_SUCCESS; } if (RT_SUCCESS(pSSM->rc)) pSSM->rc = rc; Log2(("ssmR3DataWriteFinish: failure rc=%Rrc\n", rc)); return rc; } /** * Begins writing the data of a data unit. * * Errors are signalled via pSSM->rc. * * @param pSSM The saved state handle. */ static void ssmR3DataWriteBegin(PSSMHANDLE pSSM) { pSSM->offUnit = 0; pSSM->offUnitUser = 0; } /** * Writes a record to the current data item in the saved state file. * * @returns VBox status code. Sets pSSM->rc on failure. * @param pSSM The saved state handle. * @param pvBuf The bits to write. * @param cbBuf The number of bytes to write. */ static int ssmR3DataWriteRaw(PSSMHANDLE pSSM, const void *pvBuf, size_t cbBuf) { Log2(("ssmR3DataWriteRaw: %08llx|%08llx: pvBuf=%p cbBuf=%#x %.*Rhxs%s\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pvBuf, cbBuf, RT_MIN(cbBuf, SSM_LOG_BYTES), pvBuf, cbBuf > SSM_LOG_BYTES ? "..." : "")); /* * Check that everything is fine. */ if (RT_FAILURE(pSSM->rc)) return pSSM->rc; /* * Write the data item in 1MB chunks for progress indicator reasons. */ while (cbBuf > 0) { size_t cbChunk = RT_MIN(cbBuf, _1M); int rc = ssmR3StrmWrite(&pSSM->Strm, pvBuf, cbChunk); if (RT_FAILURE(rc)) return rc; pSSM->offUnit += cbChunk; cbBuf -= cbChunk; pvBuf = (char *)pvBuf + cbChunk; } return VINF_SUCCESS; } /** * Writes a record header for the specified amount of data. * * @returns VBox status code. Sets pSSM->rc on failure. * @param pSSM The saved state handle * @param cb The amount of data. * @param u8TypeAndFlags The record type and flags. */ static int ssmR3DataWriteRecHdr(PSSMHANDLE pSSM, size_t cb, uint8_t u8TypeAndFlags) { size_t cbHdr; uint8_t abHdr[8]; abHdr[0] = u8TypeAndFlags; if (cb < 0x80) { cbHdr = 2; abHdr[1] = (uint8_t)cb; } else if (cb < 0x00000800) { cbHdr = 3; abHdr[1] = (uint8_t)(0xc0 | (cb >> 6)); abHdr[2] = (uint8_t)(0x80 | (cb & 0x3f)); } else if (cb < 0x00010000) { cbHdr = 4; abHdr[1] = (uint8_t)(0xe0 | (cb >> 12)); abHdr[2] = (uint8_t)(0x80 | ((cb >> 6) & 0x3f)); abHdr[3] = (uint8_t)(0x80 | (cb & 0x3f)); } else if (cb < 0x00200000) { cbHdr = 5; abHdr[1] = (uint8_t)(0xf0 | (cb >> 18)); abHdr[2] = (uint8_t)(0x80 | ((cb >> 12) & 0x3f)); abHdr[3] = (uint8_t)(0x80 | ((cb >> 6) & 0x3f)); abHdr[4] = (uint8_t)(0x80 | (cb & 0x3f)); } else if (cb < 0x04000000) { cbHdr = 6; abHdr[1] = (uint8_t)(0xf8 | (cb >> 24)); abHdr[2] = (uint8_t)(0x80 | ((cb >> 18) & 0x3f)); abHdr[3] = (uint8_t)(0x80 | ((cb >> 12) & 0x3f)); abHdr[4] = (uint8_t)(0x80 | ((cb >> 6) & 0x3f)); abHdr[5] = (uint8_t)(0x80 | (cb & 0x3f)); } else if (cb <= 0x7fffffff) { cbHdr = 7; abHdr[1] = (uint8_t)(0xfc | (cb >> 30)); abHdr[2] = (uint8_t)(0x80 | ((cb >> 24) & 0x3f)); abHdr[3] = (uint8_t)(0x80 | ((cb >> 18) & 0x3f)); abHdr[4] = (uint8_t)(0x80 | ((cb >> 12) & 0x3f)); abHdr[5] = (uint8_t)(0x80 | ((cb >> 6) & 0x3f)); abHdr[6] = (uint8_t)(0x80 | (cb & 0x3f)); } else AssertLogRelMsgFailedReturn(("cb=%#x\n", cb), pSSM->rc = VERR_SSM_MEM_TOO_BIG); Log3(("ssmR3DataWriteRecHdr: %08llx|%08llx/%08x: Type=%02x fImportant=%RTbool cbHdr=%u\n", ssmR3StrmTell(&pSSM->Strm) + cbHdr, pSSM->offUnit + cbHdr, cb, u8TypeAndFlags & SSM_REC_TYPE_MASK, !!(u8TypeAndFlags & SSM_REC_FLAGS_IMPORTANT), cbHdr)); return ssmR3DataWriteRaw(pSSM, &abHdr[0], cbHdr); } /** * Worker that flushes the buffered data. * * @returns VBox status code. Will set pSSM->rc on error. * @param pSSM The saved state handle. */ static int ssmR3DataFlushBuffer(PSSMHANDLE pSSM) { /* * Check how much there current is in the buffer. */ uint32_t cb = pSSM->u.Write.offDataBuffer; if (!cb) return pSSM->rc; pSSM->u.Write.offDataBuffer = 0; /* * Write a record header and then the data. * (No need for fancy optimizations here any longer since the stream is * fully buffered.) */ int rc = ssmR3DataWriteRecHdr(pSSM, cb, SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_RAW); if (RT_SUCCESS(rc)) rc = ssmR3DataWriteRaw(pSSM, pSSM->u.Write.abDataBuffer, cb); ssmR3ProgressByByte(pSSM, cb); return rc; } /** * ssmR3DataWrite worker that writes big stuff. * * @returns VBox status code * @param pSSM The saved state handle. * @param pvBuf The bits to write. * @param cbBuf The number of bytes to write. */ static int ssmR3DataWriteBig(PSSMHANDLE pSSM, const void *pvBuf, size_t cbBuf) { int rc = ssmR3DataFlushBuffer(pSSM); if (RT_SUCCESS(rc)) { pSSM->offUnitUser += cbBuf; /* * Split it up into compression blocks. */ for (;;) { AssertCompile(SSM_ZIP_BLOCK_SIZE == PAGE_SIZE); if ( cbBuf >= SSM_ZIP_BLOCK_SIZE && ( ((uintptr_t)pvBuf & 0xf) || !ASMMemIsZeroPage(pvBuf)) ) { /* * Compress it. */ AssertCompile(1 + 3 + 1 + SSM_ZIP_BLOCK_SIZE < 0x00010000); uint8_t *pb; rc = ssmR3StrmReserveWriteBufferSpace(&pSSM->Strm, 1 + 3 + 1 + SSM_ZIP_BLOCK_SIZE, &pb); if (RT_FAILURE(rc)) break; size_t cbRec = SSM_ZIP_BLOCK_SIZE - (SSM_ZIP_BLOCK_SIZE / 16); rc = RTZipBlockCompress(RTZIPTYPE_LZF, RTZIPLEVEL_FAST, 0 /*fFlags*/, pvBuf, SSM_ZIP_BLOCK_SIZE, pb + 1 + 3 + 1, cbRec, &cbRec); if (RT_SUCCESS(rc)) { pb[0] = SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_RAW_LZF; pb[4] = SSM_ZIP_BLOCK_SIZE / _1K; cbRec += 1; } else { pb[0] = SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_RAW; memcpy(&pb[4], pvBuf, SSM_ZIP_BLOCK_SIZE); cbRec = SSM_ZIP_BLOCK_SIZE; } pb[1] = (uint8_t)(0xe0 | ( cbRec >> 12)); pb[2] = (uint8_t)(0x80 | ((cbRec >> 6) & 0x3f)); pb[3] = (uint8_t)(0x80 | ( cbRec & 0x3f)); cbRec += 1 + 3; rc = ssmR3StrmCommitWriteBufferSpace(&pSSM->Strm, cbRec); if (RT_FAILURE(rc)) break; pSSM->offUnit += cbRec; ssmR3ProgressByByte(pSSM, SSM_ZIP_BLOCK_SIZE); /* advance */ if (cbBuf == SSM_ZIP_BLOCK_SIZE) return VINF_SUCCESS; cbBuf -= SSM_ZIP_BLOCK_SIZE; pvBuf = (uint8_t const*)pvBuf + SSM_ZIP_BLOCK_SIZE; } else if (cbBuf >= SSM_ZIP_BLOCK_SIZE) { /* * Zero block. */ uint8_t abRec[3]; abRec[0] = SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_RAW_ZERO; abRec[1] = 1; abRec[2] = SSM_ZIP_BLOCK_SIZE / _1K; Log3(("ssmR3DataWriteBig: %08llx|%08llx/%08x: ZERO\n", ssmR3StrmTell(&pSSM->Strm) + 2, pSSM->offUnit + 2, 1)); rc = ssmR3DataWriteRaw(pSSM, &abRec[0], sizeof(abRec)); if (RT_FAILURE(rc)) break; /* advance */ ssmR3ProgressByByte(pSSM, SSM_ZIP_BLOCK_SIZE); if (cbBuf == SSM_ZIP_BLOCK_SIZE) return VINF_SUCCESS; cbBuf -= SSM_ZIP_BLOCK_SIZE; pvBuf = (uint8_t const*)pvBuf + SSM_ZIP_BLOCK_SIZE; } else { /* * Less than one block left, store it the simple way. */ rc = ssmR3DataWriteRecHdr(pSSM, cbBuf, SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_RAW); if (RT_SUCCESS(rc)) rc = ssmR3DataWriteRaw(pSSM, pvBuf, cbBuf); ssmR3ProgressByByte(pSSM, cbBuf); break; } } } return rc; } /** * ssmR3DataWrite worker that is called when there isn't enough room in the * buffer for the current chunk of data. * * This will first flush the buffer and then add the new bits to it. * * @returns VBox status code * @param pSSM The saved state handle. * @param pvBuf The bits to write. * @param cbBuf The number of bytes to write. */ static int ssmR3DataWriteFlushAndBuffer(PSSMHANDLE pSSM, const void *pvBuf, size_t cbBuf) { int rc = ssmR3DataFlushBuffer(pSSM); if (RT_SUCCESS(rc)) { memcpy(&pSSM->u.Write.abDataBuffer[0], pvBuf, cbBuf); pSSM->u.Write.offDataBuffer = (uint32_t)cbBuf; pSSM->offUnitUser += cbBuf; } return rc; } /** * Writes data to the current data unit. * * This is an inlined wrapper that optimizes the small writes that so many of * the APIs make. * * @returns VBox status code * @param pSSM The saved state handle. * @param pvBuf The bits to write. * @param cbBuf The number of bytes to write. */ DECLINLINE(int) ssmR3DataWrite(PSSMHANDLE pSSM, const void *pvBuf, size_t cbBuf) { if (cbBuf > sizeof(pSSM->u.Write.abDataBuffer) / 8) return ssmR3DataWriteBig(pSSM, pvBuf, cbBuf); if (!cbBuf) return VINF_SUCCESS; uint32_t off = pSSM->u.Write.offDataBuffer; if (RT_UNLIKELY(cbBuf + off > sizeof(pSSM->u.Write.abDataBuffer))) return ssmR3DataWriteFlushAndBuffer(pSSM, pvBuf, cbBuf); memcpy(&pSSM->u.Write.abDataBuffer[off], pvBuf, cbBuf); pSSM->u.Write.offDataBuffer = off + (uint32_t)cbBuf; pSSM->offUnitUser += cbBuf; return VINF_SUCCESS; } /** * Puts a structure. * * @returns VBox status code. * @param pSSM The saved state handle. * @param pvStruct The structure address. * @param paFields The array of structure fields descriptions. * The array must be terminated by a SSMFIELD_ENTRY_TERM(). */ VMMR3DECL(int) SSMR3PutStruct(PSSMHANDLE pSSM, const void *pvStruct, PCSSMFIELD paFields) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); AssertPtr(pvStruct); AssertPtr(paFields); /* begin marker. */ int rc = SSMR3PutU32(pSSM, SSMR3STRUCT_BEGIN); if (RT_FAILURE(rc)) return rc; /* put the fields */ for (PCSSMFIELD pCur = paFields; pCur->cb != UINT32_MAX && pCur->off != UINT32_MAX; pCur++) { uint8_t const *pbField = (uint8_t const *)pvStruct + pCur->off; switch ((uintptr_t)pCur->pfnGetPutOrTransformer) { case SSMFIELDTRANS_NO_TRANSFORMATION: rc = ssmR3DataWrite(pSSM, pbField, pCur->cb); break; case SSMFIELDTRANS_GCPTR: AssertMsgReturn(pCur->cb == sizeof(RTGCPTR), ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3PutGCPtr(pSSM, *(PRTGCPTR)pbField); break; case SSMFIELDTRANS_GCPHYS: AssertMsgReturn(pCur->cb == sizeof(RTGCPHYS), ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3PutGCPhys(pSSM, *(PRTGCPHYS)pbField); break; case SSMFIELDTRANS_RCPTR: AssertMsgReturn(pCur->cb == sizeof(RTRCPTR), ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3PutRCPtr(pSSM, *(PRTRCPTR)pbField); break; case SSMFIELDTRANS_RCPTR_ARRAY: { uint32_t const cEntries = pCur->cb / sizeof(RTRCPTR); AssertMsgReturn(pCur->cb == cEntries * sizeof(RTRCPTR) && cEntries, ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = VINF_SUCCESS; for (uint32_t i = 0; i < cEntries && RT_SUCCESS(rc); i++) rc = SSMR3PutRCPtr(pSSM, ((PRTRCPTR)pbField)[i]); break; } default: AssertMsgFailedReturn(("%#x\n", pCur->pfnGetPutOrTransformer), VERR_SSM_FIELD_COMPLEX); } if (RT_FAILURE(rc)) return rc; } /* end marker */ return SSMR3PutU32(pSSM, SSMR3STRUCT_END); } /** * SSMR3PutStructEx helper that puts a HCPTR that is used as a NULL indicator. * * @returns VBox status code. * * @param pSSM The saved state handle. * @param pv The value to put. * @param fFlags SSMSTRUCT_FLAGS_XXX. */ DECLINLINE(int) ssmR3PutHCPtrNI(PSSMHANDLE pSSM, void *pv, uint32_t fFlags) { int rc; if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3DataWrite(pSSM, &pv, sizeof(void *)); else rc = SSMR3PutBool(pSSM, pv != NULL); return rc; } /** * SSMR3PutStructEx helper that puts an arbitrary number of zeros. * * @returns VBox status code. * @param pSSM The saved state handle. * @param cbToFill The number of zeros to stuff into the state. */ static int ssmR3PutZeros(PSSMHANDLE pSSM, uint32_t cbToFill) { while (cbToFill > 0) { uint32_t cb = RT_MIN(sizeof(g_abZero), cbToFill); int rc = ssmR3DataWrite(pSSM, g_abZero, cb); if (RT_FAILURE(rc)) return rc; cbToFill -= cb; } return VINF_SUCCESS; } /** * Puts a structure, extended API. * * @returns VBox status code. * @param pSSM The saved state handle. * @param pvStruct The structure address. * @param cbStruct The size of the struct (use for validation only). * @param fFlags Combination of SSMSTRUCT_FLAGS_XXX defines. * @param paFields The array of structure fields descriptions. The * array must be terminated by a SSMFIELD_ENTRY_TERM(). * @param pvUser User argument for any callbacks that paFields might * contain. */ VMMR3DECL(int) SSMR3PutStructEx(PSSMHANDLE pSSM, const void *pvStruct, size_t cbStruct, uint32_t fFlags, PCSSMFIELD paFields, void *pvUser) { int rc; /* * Validation. */ SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); AssertMsgReturn(!(fFlags & ~SSMSTRUCT_FLAGS_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER); AssertPtr(pvStruct); AssertPtr(paFields); /* * Begin marker. */ if (!(fFlags & SSMSTRUCT_FLAGS_NO_MARKERS)) { rc = SSMR3PutU32(pSSM, SSMR3STRUCT_BEGIN); if (RT_FAILURE(rc)) return rc; } /* * Put the fields */ uint32_t off = 0; for (PCSSMFIELD pCur = paFields; pCur->cb != UINT32_MAX && pCur->off != UINT32_MAX; pCur++) { uint32_t const offField = (!SSMFIELDTRANS_IS_PADDING(pCur->pfnGetPutOrTransformer) || pCur->off != UINT32_MAX / 2) && !SSMFIELDTRANS_IS_OLD(pCur->pfnGetPutOrTransformer) ? pCur->off : off; uint32_t const cbField = SSMFIELDTRANS_IS_OLD(pCur->pfnGetPutOrTransformer) ? 0 : SSMFIELDTRANS_IS_PADDING(pCur->pfnGetPutOrTransformer) ? RT_HIWORD(pCur->cb) : pCur->cb; AssertMsgReturn( cbField <= cbStruct && offField + cbField <= cbStruct && offField + cbField >= offField, ("off=%#x cb=%#x cbStruct=%#x (%s)\n", cbField, offField, cbStruct, pCur->pszName), VERR_SSM_FIELD_OUT_OF_BOUNDS); AssertMsgReturn( !(fFlags & SSMSTRUCT_FLAGS_FULL_STRUCT) || off == offField, ("off=%#x offField=%#x (%s)\n", off, offField, pCur->pszName), VERR_SSM_FIELD_NOT_CONSECUTIVE); rc = VINF_SUCCESS; uint8_t const *pbField = (uint8_t const *)pvStruct + offField; switch ((uintptr_t)pCur->pfnGetPutOrTransformer) { case SSMFIELDTRANS_NO_TRANSFORMATION: rc = ssmR3DataWrite(pSSM, pbField, cbField); break; case SSMFIELDTRANS_GCPHYS: AssertMsgReturn(cbField == sizeof(RTGCPHYS), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3PutGCPhys(pSSM, *(PRTGCPHYS)pbField); break; case SSMFIELDTRANS_GCPTR: AssertMsgReturn(cbField == sizeof(RTGCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3PutGCPtr(pSSM, *(PRTGCPTR)pbField); break; case SSMFIELDTRANS_RCPTR: AssertMsgReturn(cbField == sizeof(RTRCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3PutRCPtr(pSSM, *(PRTRCPTR)pbField); break; case SSMFIELDTRANS_RCPTR_ARRAY: { uint32_t const cEntries = cbField / sizeof(RTRCPTR); AssertMsgReturn(cbField == cEntries * sizeof(RTRCPTR) && cEntries, ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); for (uint32_t i = 0; i < cEntries && RT_SUCCESS(rc); i++) rc = SSMR3PutRCPtr(pSSM, ((PRTRCPTR)pbField)[i]); break; } case SSMFIELDTRANS_HCPTR_NI: AssertMsgReturn(cbField == sizeof(void *), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3PutHCPtrNI(pSSM, *(void * const *)pbField, fFlags); break; case SSMFIELDTRANS_HCPTR_NI_ARRAY: { uint32_t const cEntries = cbField / sizeof(void *); AssertMsgReturn(cbField == cEntries * sizeof(void *) && cEntries, ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); for (uint32_t i = 0; i < cEntries && RT_SUCCESS(rc); i++) rc = ssmR3PutHCPtrNI(pSSM, ((void * const *)pbField)[i], fFlags); break; } case SSMFIELDTRANS_HCPTR_HACK_U32: AssertMsgReturn(cbField == sizeof(void *), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); AssertMsgReturn(*(uintptr_t *)pbField <= UINT32_MAX, ("%p (%s)\n", *(uintptr_t *)pbField, pCur->pszName), VERR_SSM_FIELD_INVALID_VALUE); rc = ssmR3DataWrite(pSSM, pbField, sizeof(uint32_t)); if ((fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) && sizeof(void *) != sizeof(uint32_t)) rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(uint32_t)); break; case SSMFIELDTRANS_U32_ZX_U64: AssertFailedReturn(VERR_SSM_FIELD_LOAD_ONLY_TRANSFORMATION); break; case SSMFIELDTRANS_IGNORE: if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3PutZeros(pSSM, cbField); break; case SSMFIELDTRANS_IGN_GCPHYS: AssertMsgReturn(cbField == sizeof(RTGCPHYS), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(RTGCPHYS)); break; case SSMFIELDTRANS_IGN_GCPTR: AssertMsgReturn(cbField == sizeof(RTGCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(RTGCPTR)); break; case SSMFIELDTRANS_IGN_RCPTR: AssertMsgReturn(cbField == sizeof(RTRCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(RTRCPTR)); break; case SSMFIELDTRANS_IGN_HCPTR: AssertMsgReturn(cbField == sizeof(void *), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(void *)); break; case SSMFIELDTRANS_OLD: AssertMsgReturn(pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3PutZeros(pSSM, pCur->cb); break; case SSMFIELDTRANS_OLD_GCPHYS: AssertMsgReturn(pCur->cb == sizeof(RTGCPHYS) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(RTGCPHYS)); break; case SSMFIELDTRANS_OLD_GCPTR: AssertMsgReturn(pCur->cb == sizeof(RTGCPTR) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(RTGCPTR)); break; case SSMFIELDTRANS_OLD_RCPTR: AssertMsgReturn(pCur->cb == sizeof(RTRCPTR) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(RTRCPTR)); break; case SSMFIELDTRANS_OLD_HCPTR: AssertMsgReturn(pCur->cb == sizeof(void *) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3DataWrite(pSSM, g_abZero, sizeof(void *)); break; case SSMFIELDTRANS_OLD_PAD_HC: AssertMsgReturn(pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3PutZeros(pSSM, HC_ARCH_BITS == 64 ? RT_HIWORD(pCur->cb) : RT_LOWORD(pCur->cb)); break; case SSMFIELDTRANS_OLD_PAD_MSC32: AssertMsgReturn(pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (SSM_HOST_IS_MSC_32) rc = ssmR3PutZeros(pSSM, pCur->cb); break; case SSMFIELDTRANS_PAD_HC: case SSMFIELDTRANS_PAD_HC32: case SSMFIELDTRANS_PAD_HC64: case SSMFIELDTRANS_PAD_HC_AUTO: case SSMFIELDTRANS_PAD_MSC32_AUTO: { uint32_t cb32 = RT_BYTE1(pCur->cb); uint32_t cb64 = RT_BYTE2(pCur->cb); uint32_t cbCtx = HC_ARCH_BITS == 64 || ( (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_MSC32_AUTO && !SSM_HOST_IS_MSC_32) ? cb64 : cb32; uint32_t cbSaved = ssmR3GetHostBits(pSSM) == 64 || ( (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_MSC32_AUTO && !ssmR3IsHostMsc32(pSSM)) ? cb64 : cb32; AssertMsgReturn( cbField == cbCtx && ( ( pCur->off == UINT32_MAX / 2 && ( cbField == 0 || (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_HC_AUTO || (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_MSC32_AUTO ) ) || (pCur->off != UINT32_MAX / 2 && cbField != 0) ) , ("cbField=%#x cb32=%#x cb64=%#x HC_ARCH_BITS=%u cbCtx=%#x cbSaved=%#x off=%#x\n", cbField, cb32, cb64, HC_ARCH_BITS, cbCtx, cbSaved, pCur->off), VERR_SSM_FIELD_INVALID_PADDING_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = ssmR3PutZeros(pSSM, cbSaved); break; } default: AssertPtrReturn(pCur->pfnGetPutOrTransformer, VERR_SSM_FIELD_INVALID_CALLBACK); rc = pCur->pfnGetPutOrTransformer(pSSM, pCur, (void *)pvStruct, fFlags, false /*fGetOrPut*/, pvUser); break; } if (RT_FAILURE(rc)) return rc; off = offField + cbField; } AssertMsgReturn( !(fFlags & SSMSTRUCT_FLAGS_FULL_STRUCT) || off == cbStruct, ("off=%#x cbStruct=%#x\n", off, cbStruct), VERR_SSM_FIELD_NOT_CONSECUTIVE); /* * End marker */ if (!(fFlags & SSMSTRUCT_FLAGS_NO_MARKERS)) { rc = SSMR3PutU32(pSSM, SSMR3STRUCT_END); if (RT_FAILURE(rc)) return rc; } return VINF_SUCCESS; } /** * Saves a boolean item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param fBool Item to save. */ VMMR3DECL(int) SSMR3PutBool(PSSMHANDLE pSSM, bool fBool) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); uint8_t u8 = fBool; /* enforce 1 byte size */ return ssmR3DataWrite(pSSM, &u8, sizeof(u8)); } /** * Saves a 8-bit unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u8 Item to save. */ VMMR3DECL(int) SSMR3PutU8(PSSMHANDLE pSSM, uint8_t u8) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u8, sizeof(u8)); } /** * Saves a 8-bit signed integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param i8 Item to save. */ VMMR3DECL(int) SSMR3PutS8(PSSMHANDLE pSSM, int8_t i8) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &i8, sizeof(i8)); } /** * Saves a 16-bit unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u16 Item to save. */ VMMR3DECL(int) SSMR3PutU16(PSSMHANDLE pSSM, uint16_t u16) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u16, sizeof(u16)); } /** * Saves a 16-bit signed integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param i16 Item to save. */ VMMR3DECL(int) SSMR3PutS16(PSSMHANDLE pSSM, int16_t i16) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &i16, sizeof(i16)); } /** * Saves a 32-bit unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u32 Item to save. */ VMMR3DECL(int) SSMR3PutU32(PSSMHANDLE pSSM, uint32_t u32) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u32, sizeof(u32)); } /** * Saves a 32-bit signed integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param i32 Item to save. */ VMMR3DECL(int) SSMR3PutS32(PSSMHANDLE pSSM, int32_t i32) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &i32, sizeof(i32)); } /** * Saves a 64-bit unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u64 Item to save. */ VMMR3DECL(int) SSMR3PutU64(PSSMHANDLE pSSM, uint64_t u64) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u64, sizeof(u64)); } /** * Saves a 64-bit signed integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param i64 Item to save. */ VMMR3DECL(int) SSMR3PutS64(PSSMHANDLE pSSM, int64_t i64) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &i64, sizeof(i64)); } /** * Saves a 128-bit unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u128 Item to save. */ VMMR3DECL(int) SSMR3PutU128(PSSMHANDLE pSSM, uint128_t u128) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u128, sizeof(u128)); } /** * Saves a 128-bit signed integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param i128 Item to save. */ VMMR3DECL(int) SSMR3PutS128(PSSMHANDLE pSSM, int128_t i128) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &i128, sizeof(i128)); } /** * Saves a VBox unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u Item to save. */ VMMR3DECL(int) SSMR3PutUInt(PSSMHANDLE pSSM, RTUINT u) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u, sizeof(u)); } /** * Saves a VBox signed integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param i Item to save. */ VMMR3DECL(int) SSMR3PutSInt(PSSMHANDLE pSSM, RTINT i) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &i, sizeof(i)); } /** * Saves a GC natural unsigned integer item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u Item to save. * * @deprecated Silly type, don't use it. */ VMMR3DECL(int) SSMR3PutGCUInt(PSSMHANDLE pSSM, RTGCUINT u) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u, sizeof(u)); } /** * Saves a GC unsigned integer register item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param u Item to save. */ VMMR3DECL(int) SSMR3PutGCUIntReg(PSSMHANDLE pSSM, RTGCUINTREG u) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &u, sizeof(u)); } /** * Saves a 32 bits GC physical address item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param GCPhys The item to save */ VMMR3DECL(int) SSMR3PutGCPhys32(PSSMHANDLE pSSM, RTGCPHYS32 GCPhys) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &GCPhys, sizeof(GCPhys)); } /** * Saves a 64 bits GC physical address item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param GCPhys The item to save */ VMMR3DECL(int) SSMR3PutGCPhys64(PSSMHANDLE pSSM, RTGCPHYS64 GCPhys) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &GCPhys, sizeof(GCPhys)); } /** * Saves a GC physical address item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param GCPhys The item to save */ VMMR3DECL(int) SSMR3PutGCPhys(PSSMHANDLE pSSM, RTGCPHYS GCPhys) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &GCPhys, sizeof(GCPhys)); } /** * Saves a GC virtual address item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param GCPtr The item to save. */ VMMR3DECL(int) SSMR3PutGCPtr(PSSMHANDLE pSSM, RTGCPTR GCPtr) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &GCPtr, sizeof(GCPtr)); } /** * Saves an RC virtual address item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param RCPtr The item to save. */ VMMR3DECL(int) SSMR3PutRCPtr(PSSMHANDLE pSSM, RTRCPTR RCPtr) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &RCPtr, sizeof(RCPtr)); } /** * Saves a GC virtual address (represented as an unsigned integer) item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param GCPtr The item to save. */ VMMR3DECL(int) SSMR3PutGCUIntPtr(PSSMHANDLE pSSM, RTGCUINTPTR GCPtr) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &GCPtr, sizeof(GCPtr)); } /** * Saves a I/O port address item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param IOPort The item to save. */ VMMR3DECL(int) SSMR3PutIOPort(PSSMHANDLE pSSM, RTIOPORT IOPort) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &IOPort, sizeof(IOPort)); } /** * Saves a selector item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param Sel The item to save. */ VMMR3DECL(int) SSMR3PutSel(PSSMHANDLE pSSM, RTSEL Sel) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, &Sel, sizeof(Sel)); } /** * Saves a memory item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pv Item to save. * @param cb Size of the item. */ VMMR3DECL(int) SSMR3PutMem(PSSMHANDLE pSSM, const void *pv, size_t cb) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataWrite(pSSM, pv, cb); } /** * Saves a zero terminated string item to the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param psz Item to save. */ VMMR3DECL(int) SSMR3PutStrZ(PSSMHANDLE pSSM, const char *psz) { SSM_ASSERT_WRITEABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); size_t cch = strlen(psz); if (cch > _1M) { AssertMsgFailed(("a %zu byte long string, what's this!?!\n", cch)); return VERR_TOO_MUCH_DATA; } uint32_t u32 = (uint32_t)cch; int rc = ssmR3DataWrite(pSSM, &u32, sizeof(u32)); if (rc) return rc; return ssmR3DataWrite(pSSM, psz, cch); } /** * Emits a SSMLiveControl unit with a new progress report. * * @returns VBox status code. * @param pSSM The saved state handle. * @param lrdPct The progress of the live save. * @param uPass The current pass. */ static int ssmR3LiveControlEmit(PSSMHANDLE pSSM, long double lrdPct, uint32_t uPass) { AssertMsg(lrdPct <= 100.0, ("%u\n", lrdPct * 100)); /* * Make sure we're in one of the two EXEC states or we may fail. */ SSMSTATE enmSavedState = pSSM->enmOp; if (enmSavedState == SSMSTATE_LIVE_VOTE) pSSM->enmOp = SSMSTATE_LIVE_EXEC; else if (enmSavedState == SSMSTATE_SAVE_DONE) pSSM->enmOp = SSMSTATE_SAVE_EXEC; /* * Write the unit header. */ SSMFILEUNITHDRV2 UnitHdr; memcpy(&UnitHdr.szMagic[0], SSMFILEUNITHDR_MAGIC, sizeof(UnitHdr.szMagic)); UnitHdr.offStream = ssmR3StrmTell(&pSSM->Strm); UnitHdr.u32CurStreamCRC = ssmR3StrmCurCRC(&pSSM->Strm); UnitHdr.u32CRC = 0; UnitHdr.u32Version = 1; UnitHdr.u32Instance = 0; UnitHdr.u32Pass = uPass; UnitHdr.fFlags = 0; UnitHdr.cbName = sizeof("SSMLiveControl"); memcpy(&UnitHdr.szName[0], "SSMLiveControl", UnitHdr.cbName); UnitHdr.u32CRC = RTCrc32(&UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName])); Log(("SSM: Unit at %#9llx: '%s', instance %u, pass %#x, version %u\n", UnitHdr.offStream, UnitHdr.szName, UnitHdr.u32Instance, UnitHdr.u32Pass, UnitHdr.u32Version)); int rc = ssmR3StrmWrite(&pSSM->Strm, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName])); if (RT_SUCCESS(rc)) { /* * Write the payload. */ ssmR3DataWriteBegin(pSSM); uint16_t u16PartsPerTenThousand = (uint16_t)(lrdPct * (100 - pSSM->uPercentDone)); AssertMsg(u16PartsPerTenThousand <= 10000, ("%u\n", u16PartsPerTenThousand)); ssmR3DataWrite(pSSM, &u16PartsPerTenThousand, sizeof(u16PartsPerTenThousand)); rc = ssmR3DataFlushBuffer(pSSM); /* will return SSMHANDLE::rc if it is set */ if (RT_SUCCESS(rc)) { /* * Write the termination record and flush the compression stream. */ SSMRECTERM TermRec; TermRec.u8TypeAndFlags = SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_TERM; TermRec.cbRec = sizeof(TermRec) - 2; if (pSSM->Strm.fChecksummed) { TermRec.fFlags = SSMRECTERM_FLAGS_CRC32; TermRec.u32StreamCRC = RTCrc32Finish(RTCrc32Process(ssmR3StrmCurCRC(&pSSM->Strm), &TermRec, 2)); } else { TermRec.fFlags = 0; TermRec.u32StreamCRC = 0; } TermRec.cbUnit = pSSM->offUnit + sizeof(TermRec); rc = ssmR3DataWriteRaw(pSSM, &TermRec, sizeof(TermRec)); if (RT_SUCCESS(rc)) rc = ssmR3DataWriteFinish(pSSM); if (RT_SUCCESS(rc)) { pSSM->enmOp = enmSavedState; return rc; } } } LogRel(("SSM: Failed to write live control unit. rc=%Rrc\n", rc)); if (RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; pSSM->enmOp = enmSavedState; return rc; } /** * Enters the critical session (optionally) associated with the unit. * * @param pUnit The unit. */ DECLINLINE(void) ssmR3UnitCritSectEnter(PSSMUNIT pUnit) { PPDMCRITSECT pCritSect = pUnit->pCritSect; if (pCritSect) { int rc = PDMCritSectEnter(pCritSect, VERR_IGNORED); AssertRC(rc); } } /** * Leaves the critical session (optionally) associated with the unit. * * @param pUnit The unit. */ DECLINLINE(void) ssmR3UnitCritSectLeave(PSSMUNIT pUnit) { PPDMCRITSECT pCritSect = pUnit->pCritSect; if (pCritSect) { int rc = PDMCritSectLeave(pCritSect); AssertRC(rc); } } /** * Do the pfnSaveDone run. * * @returns VBox status code (pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3SaveDoDoneRun(PVM pVM, PSSMHANDLE pSSM) { VM_ASSERT_EMT0(pVM); /* * Do the done run. */ pSSM->enmOp = SSMSTATE_SAVE_DONE; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { if ( pUnit->u.Common.pfnSaveDone && ( pUnit->fCalled || (!pUnit->u.Common.pfnSavePrep && !pUnit->u.Common.pfnSaveExec))) { int rcOld = pSSM->rc; int rc; ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnSaveDone(pUnit->u.Dev.pDevIns, pSSM); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnSaveDone(pUnit->u.Drv.pDrvIns, pSSM); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnSaveDone(pVM, pSSM); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnSaveDone(pSSM, pUnit->u.External.pvUser); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); if (RT_SUCCESS(rc) && pSSM->rc != rcOld) rc = pSSM->rc; if (RT_FAILURE(rc)) { LogRel(("SSM: Done save failed with rc=%Rrc for data unit '%s.\n", rc, pUnit->szName)); if (RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; } } } return pSSM->rc; } /** * Worker for SSMR3LiveDone and SSMR3Save that closes the handle and deletes the * saved state file on failure. * * @returns VBox status code (pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3SaveDoClose(PVM pVM, PSSMHANDLE pSSM) { VM_ASSERT_EMT0(pVM); pVM->ssm.s.uPass = 0; /* * Make it non-cancellable, close the stream and delete the file on failure. */ ssmR3SetCancellable(pVM, pSSM, false); int rc = ssmR3StrmClose(&pSSM->Strm, pSSM->rc == VERR_SSM_CANCELLED); if (RT_SUCCESS(rc)) rc = pSSM->rc; if (RT_SUCCESS(rc)) { Assert(pSSM->enmOp == SSMSTATE_SAVE_DONE); if (pSSM->pfnProgress) pSSM->pfnProgress(pVM->pUVM, 100, pSSM->pvUser); LogRel(("SSM: Successfully saved the VM state to '%s'\n", pSSM->pszFilename ? pSSM->pszFilename : "")); } else { if (pSSM->pszFilename) { int rc2 = RTFileDelete(pSSM->pszFilename); AssertRC(rc2); if (RT_SUCCESS(rc2)) LogRel(("SSM: Failed to save the VM state to '%s' (file deleted): %Rrc\n", pSSM->pszFilename, rc)); else LogRel(("SSM: Failed to save the VM state to '%s' (file deletion failed, rc2=%Rrc): %Rrc\n", pSSM->pszFilename, rc2, rc)); } else LogRel(("SSM: Failed to save the VM state.\n")); Assert(pSSM->enmOp <= SSMSTATE_SAVE_DONE); if (pSSM->enmOp != SSMSTATE_SAVE_DONE) ssmR3SaveDoDoneRun(pVM, pSSM); } /* * Trash the handle before freeing it. */ ASMAtomicWriteU32(&pSSM->fCancelled, 0); pSSM->pVM = NULL; pSSM->enmAfter = SSMAFTER_INVALID; pSSM->enmOp = SSMSTATE_INVALID; RTMemFree(pSSM); return rc; } /** * Closes the SSM handle. * * This must always be called on a handled returned by SSMR3LiveSave. * * @returns VBox status. * * @param pSSM The SSM handle returned by SSMR3LiveSave. * * @thread EMT(0). */ VMMR3_INT_DECL(int) SSMR3LiveDone(PSSMHANDLE pSSM) { LogFlow(("SSMR3LiveDone: pSSM=%p\n", pSSM)); /* * Validate input. */ AssertPtrReturn(pSSM, VERR_INVALID_POINTER); PVM pVM = pSSM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); VM_ASSERT_EMT0(pVM); AssertMsgReturn( pSSM->enmAfter == SSMAFTER_DESTROY || pSSM->enmAfter == SSMAFTER_CONTINUE || pSSM->enmAfter == SSMAFTER_TELEPORT, ("%d\n", pSSM->enmAfter), VERR_INVALID_PARAMETER); AssertMsgReturn( pSSM->enmOp >= SSMSTATE_LIVE_PREP && pSSM->enmOp <= SSMSTATE_SAVE_DONE, ("%d\n", pSSM->enmOp), VERR_INVALID_STATE); /* * Join paths with SSMR3Save again. */ return ssmR3SaveDoClose(pVM, pSSM); } /** * Writes the directory. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The SSM handle. * @param pcEntries Where to return the number of directory entries. */ static int ssmR3WriteDirectory(PVM pVM, PSSMHANDLE pSSM, uint32_t *pcEntries) { VM_ASSERT_EMT0(pVM); /* * Grab some temporary memory for the dictionary. */ size_t cbDir = RT_OFFSETOF(SSMFILEDIR, aEntries[pVM->ssm.s.cUnits]); PSSMFILEDIR pDir = (PSSMFILEDIR)RTMemTmpAlloc(cbDir); if (!pDir) { LogRel(("ssmR3WriteDirectory: failed to allocate %zu bytes!\n", cbDir)); return VERR_NO_TMP_MEMORY; } /* * Initialize it. */ memcpy(pDir->szMagic, SSMFILEDIR_MAGIC, sizeof(pDir->szMagic)); pDir->u32CRC = 0; pDir->cEntries = 0; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) if (pUnit->offStream != RTFOFF_MIN) { PSSMFILEDIRENTRY pEntry = &pDir->aEntries[pDir->cEntries++]; Assert(pDir->cEntries <= pVM->ssm.s.cUnits); Assert(pUnit->offStream >= (RTFOFF)sizeof(SSMFILEHDR)); pEntry->off = pUnit->offStream; pEntry->u32Instance = pUnit->u32Instance; pEntry->u32NameCRC = RTCrc32(pUnit->szName, pUnit->cchName); } /* * Calculate the actual size and CRC-32, then write the directory * out to the stream. */ *pcEntries = pDir->cEntries; cbDir = RT_OFFSETOF(SSMFILEDIR, aEntries[pDir->cEntries]); pDir->u32CRC = RTCrc32(pDir, cbDir); int rc = ssmR3StrmWrite(&pSSM->Strm, pDir, cbDir); RTMemTmpFree(pDir); return rc; } /** * Finalize the saved state stream, i.e. add the end unit, directory * and footer. * * @returns VBox status code (pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3SaveDoFinalization(PVM pVM, PSSMHANDLE pSSM) { VM_ASSERT_EMT0(pVM); Assert(RT_SUCCESS(pSSM->rc)); /* * Write the end unit. */ SSMFILEUNITHDRV2 UnitHdr; memcpy(&UnitHdr.szMagic[0], SSMFILEUNITHDR_END, sizeof(UnitHdr.szMagic)); UnitHdr.offStream = ssmR3StrmTell(&pSSM->Strm); UnitHdr.u32CurStreamCRC = ssmR3StrmCurCRC(&pSSM->Strm); UnitHdr.u32CRC = 0; UnitHdr.u32Version = 0; UnitHdr.u32Instance = 0; UnitHdr.u32Pass = SSM_PASS_FINAL; UnitHdr.fFlags = 0; UnitHdr.cbName = 0; UnitHdr.u32CRC = RTCrc32(&UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[0])); Log(("SSM: Unit at %#9llx: END UNIT\n", UnitHdr.offStream)); int rc = ssmR3StrmWrite(&pSSM->Strm, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[0])); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed writing the end unit: %Rrc\n", rc)); return pSSM->rc = rc; } /* * Write the directory for the final units and then the footer. */ SSMFILEFTR Footer; rc = ssmR3WriteDirectory(pVM, pSSM, &Footer.cDirEntries); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed writing the directory: %Rrc\n", rc)); return pSSM->rc = rc; } memcpy(Footer.szMagic, SSMFILEFTR_MAGIC, sizeof(Footer.szMagic)); Footer.offStream = ssmR3StrmTell(&pSSM->Strm); Footer.u32StreamCRC = ssmR3StrmFinalCRC(&pSSM->Strm); Footer.u32Reserved = 0; Footer.u32CRC = 0; Footer.u32CRC = RTCrc32(&Footer, sizeof(Footer)); Log(("SSM: Footer at %#9llx: \n", Footer.offStream)); rc = ssmR3StrmWrite(&pSSM->Strm, &Footer, sizeof(Footer)); if (RT_SUCCESS(rc)) rc = ssmR3StrmSetEnd(&pSSM->Strm); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed writing the footer: %Rrc\n", rc)); return pSSM->rc = rc; } LogRel(("SSM: Footer at %#llx (%lld), %u directory entries.\n", Footer.offStream, Footer.offStream, Footer.cDirEntries)); return VINF_SUCCESS; } /** * Works the progress calculation during the exec part of a live save. * * @param pSSM The SSM handle. * @param iUnit The current unit number. */ static void ssmR3ProgressByUnit(PSSMHANDLE pSSM, uint32_t iUnit) { if (pSSM->fLiveSave) { unsigned uPctExec = iUnit * 100 / pSSM->pVM->ssm.s.cUnits; unsigned cPctExec = 100 - pSSM->uPercentDone - pSSM->uPercentPrepare - pSSM->uPercentLive; long double lrdPct = (long double)uPctExec * cPctExec / 100 + pSSM->uPercentPrepare + pSSM->uPercentLive; unsigned uPct = (unsigned)lrdPct; if (uPct != pSSM->uPercent) { ssmR3LiveControlEmit(pSSM, lrdPct, SSM_PASS_FINAL); pSSM->uPercent = uPct; pSSM->pfnProgress(pSSM->pVM->pUVM, uPct, pSSM->pvUser); } } } /** * Do the pfnSaveExec run. * * @returns VBox status code (pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3SaveDoExecRun(PVM pVM, PSSMHANDLE pSSM) { VM_ASSERT_EMT0(pVM); AssertRC(pSSM->rc); pSSM->rc = VINF_SUCCESS; pSSM->enmOp = SSMSTATE_SAVE_EXEC; unsigned iUnit = 0; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext, iUnit++) { /* * Not all unit have a callback. Skip those which don't and * make sure to keep the progress indicator up to date. */ ssmR3ProgressByUnit(pSSM, iUnit); pSSM->offEstUnitEnd += pUnit->cbGuess; if (!pUnit->u.Common.pfnSaveExec) { pUnit->fCalled = true; if (pUnit->cbGuess) ssmR3ProgressByByte(pSSM, pSSM->offEstUnitEnd - pSSM->offEst); continue; } pUnit->offStream = ssmR3StrmTell(&pSSM->Strm); /* * Check for cancellation. */ if (RT_UNLIKELY(ASMAtomicUoReadU32(&(pSSM)->fCancelled) == SSMHANDLE_CANCELLED)) { LogRel(("SSM: Cancelled!\n")); AssertRC(pSSM->rc); return pSSM->rc = VERR_SSM_CANCELLED; } /* * Write data unit header */ SSMFILEUNITHDRV2 UnitHdr; memcpy(&UnitHdr.szMagic[0], SSMFILEUNITHDR_MAGIC, sizeof(UnitHdr.szMagic)); UnitHdr.offStream = pUnit->offStream; UnitHdr.u32CurStreamCRC = ssmR3StrmCurCRC(&pSSM->Strm); UnitHdr.u32CRC = 0; UnitHdr.u32Version = pUnit->u32Version; UnitHdr.u32Instance = pUnit->u32Instance; UnitHdr.u32Pass = SSM_PASS_FINAL; UnitHdr.fFlags = 0; UnitHdr.cbName = (uint32_t)pUnit->cchName + 1; memcpy(&UnitHdr.szName[0], &pUnit->szName[0], UnitHdr.cbName); UnitHdr.u32CRC = RTCrc32(&UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName])); Log(("SSM: Unit at %#9llx: '%s', instance %u, pass %#x, version %u\n", UnitHdr.offStream, UnitHdr.szName, UnitHdr.u32Instance, UnitHdr.u32Pass, UnitHdr.u32Version)); int rc = ssmR3StrmWrite(&pSSM->Strm, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName])); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed to write unit header. rc=%Rrc\n", rc)); return pSSM->rc = rc; } /* * Call the execute handler. */ ssmR3DataWriteBegin(pSSM); ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnSaveExec(pUnit->u.Dev.pDevIns, pSSM); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnSaveExec(pUnit->u.Drv.pDrvIns, pSSM); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnSaveExec(pVM, pSSM); break; case SSMUNITTYPE_EXTERNAL: pUnit->u.External.pfnSaveExec(pSSM, pUnit->u.External.pvUser); rc = pSSM->rc; break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; if (RT_FAILURE(rc) && RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; else rc = ssmR3DataFlushBuffer(pSSM); /* will return SSMHANDLE::rc if it is set */ if (RT_FAILURE(rc)) { LogRel(("SSM: Execute save failed with rc=%Rrc for data unit '%s'/#%u.\n", rc, pUnit->szName, pUnit->u32Instance)); return rc; } /* * Write the termination record and flush the compression stream. */ SSMRECTERM TermRec; TermRec.u8TypeAndFlags = SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_TERM; TermRec.cbRec = sizeof(TermRec) - 2; if (pSSM->Strm.fChecksummed) { TermRec.fFlags = SSMRECTERM_FLAGS_CRC32; TermRec.u32StreamCRC = RTCrc32Finish(RTCrc32Process(ssmR3StrmCurCRC(&pSSM->Strm), &TermRec, 2)); } else { TermRec.fFlags = 0; TermRec.u32StreamCRC = 0; } TermRec.cbUnit = pSSM->offUnit + sizeof(TermRec); rc = ssmR3DataWriteRaw(pSSM, &TermRec, sizeof(TermRec)); if (RT_SUCCESS(rc)) rc = ssmR3DataWriteFinish(pSSM); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed terminating unit: %Rrc\n", rc)); return pSSM->rc = rc; } /* * Advance the progress indicator to the end of the current unit. */ ssmR3ProgressByByte(pSSM, pSSM->offEstUnitEnd - pSSM->offEst); } /* for each unit */ ssmR3ProgressByUnit(pSSM, pVM->ssm.s.cUnits); /* (progress should be pending 99% now) */ AssertMsg( pSSM->uPercent == 101 - pSSM->uPercentDone || pSSM->uPercent == 100 - pSSM->uPercentDone, ("%d\n", pSSM->uPercent)); return VINF_SUCCESS; } /** * Do the pfnSavePrep run. * * @returns VBox status code (pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3SaveDoPrepRun(PVM pVM, PSSMHANDLE pSSM) { VM_ASSERT_EMT0(pVM); Assert(RT_SUCCESS(pSSM->rc)); pSSM->enmOp = SSMSTATE_SAVE_PREP; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { if (pUnit->u.Common.pfnSavePrep) { int rc; ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnSavePrep(pUnit->u.Dev.pDevIns, pSSM); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnSavePrep(pUnit->u.Drv.pDrvIns, pSSM); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnSavePrep(pVM, pSSM); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnSavePrep(pSSM, pUnit->u.External.pvUser); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; if (RT_FAILURE(rc) && RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; else rc = pSSM->rc; if (RT_FAILURE(rc)) { LogRel(("SSM: Prepare save failed with rc=%Rrc for data unit '%s.\n", rc, pUnit->szName)); return rc; } } pSSM->cbEstTotal += pUnit->cbGuess; } /* * Work the progress indicator if we got one. */ if (pSSM->pfnProgress) pSSM->pfnProgress(pVM->pUVM, pSSM->uPercentPrepare + pSSM->uPercentLive - 1, pSSM->pvUser); pSSM->uPercent = pSSM->uPercentPrepare + pSSM->uPercentLive; return VINF_SUCCESS; } /** * Common worker for SSMR3Save and SSMR3LiveSave. * * @returns VBox status code (no need to check pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The state handle. * * @thread EMT(0) */ static int ssmR3SaveDoCommon(PVM pVM, PSSMHANDLE pSSM) { VM_ASSERT_EMT0(pVM); /* * Do the work. */ int rc = ssmR3SaveDoPrepRun(pVM, pSSM); if (RT_SUCCESS(rc)) { rc = ssmR3SaveDoExecRun(pVM, pSSM); if (RT_SUCCESS(rc)) rc = ssmR3SaveDoFinalization(pVM, pSSM); } Assert(pSSM->rc == rc); int rc2 = ssmR3SaveDoDoneRun(pVM, pSSM); if (RT_SUCCESS(rc)) rc = rc2; return rc; } /** * Saves the rest of the state on EMT0. * * @returns VBox status. * * @param pSSM The SSM handle returned by SSMR3LiveSave. * * @thread Non-EMT thread. Will involve the EMT at the end of the operation. */ VMMR3_INT_DECL(int) SSMR3LiveDoStep2(PSSMHANDLE pSSM) { LogFlow(("SSMR3LiveDoStep2: pSSM=%p\n", pSSM)); /* * Validate input. */ AssertPtrReturn(pSSM, VERR_INVALID_POINTER); PVM pVM = pSSM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); VM_ASSERT_EMT0(pVM); AssertMsgReturn( pSSM->enmAfter == SSMAFTER_DESTROY || pSSM->enmAfter == SSMAFTER_CONTINUE || pSSM->enmAfter == SSMAFTER_TELEPORT, ("%d\n", pSSM->enmAfter), VERR_INVALID_PARAMETER); AssertMsgReturn(pSSM->enmOp == SSMSTATE_LIVE_STEP2, ("%d\n", pSSM->enmOp), VERR_INVALID_STATE); AssertRCReturn(pSSM->rc, pSSM->rc); /* * Join paths with VMMR3Save. */ return ssmR3SaveDoCommon(pVM, pSSM); } /** * Writes the file header and clear the per-unit data. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The SSM handle. */ static int ssmR3WriteHeaderAndClearPerUnitData(PVM pVM, PSSMHANDLE pSSM) { /* * Write the header. */ SSMFILEHDR FileHdr; memcpy(&FileHdr.szMagic, SSMFILEHDR_MAGIC_V2_0, sizeof(FileHdr.szMagic)); FileHdr.u16VerMajor = VBOX_VERSION_MAJOR; FileHdr.u16VerMinor = VBOX_VERSION_MINOR; FileHdr.u32VerBuild = VBOX_VERSION_BUILD; FileHdr.u32SvnRev = VMMGetSvnRev(); FileHdr.cHostBits = HC_ARCH_BITS; FileHdr.cbGCPhys = sizeof(RTGCPHYS); FileHdr.cbGCPtr = sizeof(RTGCPTR); FileHdr.u8Reserved = 0; FileHdr.cUnits = pVM->ssm.s.cUnits; FileHdr.fFlags = SSMFILEHDR_FLAGS_STREAM_CRC32; if (pSSM->fLiveSave) FileHdr.fFlags |= SSMFILEHDR_FLAGS_STREAM_LIVE_SAVE; FileHdr.cbMaxDecompr = RT_SIZEOFMEMB(SSMHANDLE, u.Read.abDataBuffer); FileHdr.u32CRC = 0; FileHdr.u32CRC = RTCrc32(&FileHdr, sizeof(FileHdr)); int rc = ssmR3StrmWrite(&pSSM->Strm, &FileHdr, sizeof(FileHdr)); if (RT_FAILURE(rc)) return rc; /* * Clear the per unit flags and offsets. */ for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { pUnit->fCalled = false; pUnit->offStream = RTFOFF_MIN; } return VINF_SUCCESS; } /** * Creates a new saved state file. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pszFilename The name of the file. NULL if pStreamOps is * used. * @param pStreamOps The stream methods. NULL if pszFilename is * used. * @param pvStreamOpsUser The user argument to the stream methods. * @param enmAfter What to do afterwards. * @param pfnProgress The progress callback. * @param pvProgressUser The progress callback user argument. * @param ppSSM Where to return the pointer to the saved state * handle upon successful return. Free it using * RTMemFree after closing the stream. */ static int ssmR3SaveDoCreateFile(PVM pVM, const char *pszFilename, PCSSMSTRMOPS pStreamOps, void *pvStreamOpsUser, SSMAFTER enmAfter, PFNVMPROGRESS pfnProgress, void *pvProgressUser, PSSMHANDLE *ppSSM) { PSSMHANDLE pSSM = (PSSMHANDLE)RTMemAllocZ(sizeof(*pSSM)); if (!pSSM) return VERR_NO_MEMORY; pSSM->pVM = pVM; pSSM->enmOp = SSMSTATE_INVALID; pSSM->enmAfter = enmAfter; pSSM->fCancelled = SSMHANDLE_OK; pSSM->rc = VINF_SUCCESS; pSSM->cbUnitLeftV1 = 0; pSSM->offUnit = UINT64_MAX; pSSM->offUnitUser = UINT64_MAX; pSSM->fLiveSave = false; pSSM->pfnProgress = pfnProgress; pSSM->pvUser = pvProgressUser; pSSM->uPercent = 0; pSSM->offEstProgress = 0; pSSM->cbEstTotal = 0; pSSM->offEst = 0; pSSM->offEstUnitEnd = 0; pSSM->uPercentLive = 0; pSSM->uPercentPrepare = 0; pSSM->uPercentDone = 0; pSSM->uReportedLivePercent = 0; pSSM->pszFilename = pszFilename; pSSM->u.Write.offDataBuffer = 0; pSSM->u.Write.cMsMaxDowntime = UINT32_MAX; int rc; if (pStreamOps) rc = ssmR3StrmInit(&pSSM->Strm, pStreamOps, pvStreamOpsUser, true /*fWrite*/, true /*fChecksummed*/, 8 /*cBuffers*/); else rc = ssmR3StrmOpenFile(&pSSM->Strm, pszFilename, true /*fWrite*/, true /*fChecksummed*/, 8 /*cBuffers*/); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed to create save state file '%s', rc=%Rrc.\n", pszFilename, rc)); RTMemFree(pSSM); return rc; } *ppSSM = pSSM; return VINF_SUCCESS; } /** * Start VM save operation. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param pszFilename Name of the file to save the state in. NULL if pStreamOps is used. * @param pStreamOps The stream method table. NULL if pszFilename is * used. * @param pvStreamOpsUser The user argument to the stream methods. * @param enmAfter What is planned after a successful save operation. * @param pfnProgress Progress callback. Optional. * @param pvUser User argument for the progress callback. * * @thread EMT */ VMMR3DECL(int) SSMR3Save(PVM pVM, const char *pszFilename, PCSSMSTRMOPS pStreamOps, void *pvStreamOpsUser, SSMAFTER enmAfter, PFNVMPROGRESS pfnProgress, void *pvUser) { LogFlow(("SSMR3Save: pszFilename=%p:{%s} enmAfter=%d pfnProgress=%p pvUser=%p\n", pszFilename, pszFilename, enmAfter, pfnProgress, pvUser)); VM_ASSERT_EMT0(pVM); /* * Validate input. */ AssertMsgReturn( enmAfter == SSMAFTER_DESTROY || enmAfter == SSMAFTER_CONTINUE, ("%d\n", enmAfter), VERR_INVALID_PARAMETER); AssertReturn(!pszFilename != !pStreamOps, VERR_INVALID_PARAMETER); if (pStreamOps) { AssertReturn(pStreamOps->u32Version == SSMSTRMOPS_VERSION, VERR_INVALID_MAGIC); AssertReturn(pStreamOps->u32EndVersion == SSMSTRMOPS_VERSION, VERR_INVALID_MAGIC); AssertReturn(pStreamOps->pfnWrite, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnRead, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnSeek, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnTell, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnSize, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnClose, VERR_INVALID_PARAMETER); } /* * Create the saved state file and handle. * * Note that there might be quite some work to do after executing the saving, * so we reserve 20% for the 'Done' period. */ PSSMHANDLE pSSM; int rc = ssmR3SaveDoCreateFile(pVM, pszFilename, pStreamOps, pvStreamOpsUser, enmAfter, pfnProgress, pvUser, &pSSM); if (RT_FAILURE(rc)) return rc; pSSM->uPercentLive = 0; pSSM->uPercentPrepare = 20; pSSM->uPercentDone = 2; pSSM->fLiveSave = false; /* * Write the saved state stream header and join paths with * the other save methods for the rest of the job. */ Log(("SSM: Starting state save to file '%s'...\n", pszFilename)); ssmR3StrmStartIoThread(&pSSM->Strm); rc = ssmR3WriteHeaderAndClearPerUnitData(pVM, pSSM); if (RT_SUCCESS(rc)) { ssmR3SetCancellable(pVM, pSSM, true); ssmR3SaveDoCommon(pVM, pSSM); } return ssmR3SaveDoClose(pVM, pSSM); } /** * Used by PGM to report the completion percentage of the live stage during the * vote run. * * @param pSSM The saved state handle. * @param uPercent The completion percentage. */ VMMR3DECL(void) SSMR3HandleReportLivePercent(PSSMHANDLE pSSM, unsigned uPercent) { AssertMsgReturnVoid(pSSM->enmOp == SSMSTATE_LIVE_VOTE, ("%d\n", pSSM->enmOp)); AssertReturnVoid(uPercent <= 100); if (uPercent < pSSM->uReportedLivePercent) pSSM->uReportedLivePercent = uPercent; } /** * Calls pfnLiveVote for all units. * * @returns VBox status code (no need to check pSSM->rc). * @retval VINF_SUCCESS if we can pass on to step 2. * @retval VINF_SSM_VOTE_FOR_ANOTHER_PASS if we need another pass. * * @param pVM Pointer to the VM. * @param pSSM The saved state handle. * @param uPass The current pass. */ static int ssmR3LiveDoVoteRun(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass) { int rcRet = VINF_SUCCESS; AssertRC(pSSM->rc); pSSM->rc = VINF_SUCCESS; pSSM->enmOp = SSMSTATE_LIVE_VOTE; unsigned uPrevPrecent = pSSM->uReportedLivePercent; pSSM->uReportedLivePercent = 101; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { if ( pUnit->u.Common.pfnLiveVote && !pUnit->fDoneLive) { int rc; ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLiveVote(pUnit->u.Dev.pDevIns, pSSM, uPass); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLiveVote(pUnit->u.Drv.pDrvIns, pSSM, uPass); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLiveVote(pVM, pSSM, uPass); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLiveVote(pSSM, pUnit->u.External.pvUser, uPass); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; Assert(pSSM->rc == VINF_SUCCESS); if (rc != VINF_SUCCESS) { if (rc == VINF_SSM_VOTE_FOR_ANOTHER_PASS) { Log(("ssmR3DoLiveVoteRun: '%s'/#%u -> VINF_SSM_VOTE_FOR_ANOTHER_PASS (pass=%u)\n", pUnit->szName, pUnit->u32Instance, uPass)); rcRet = VINF_SSM_VOTE_FOR_ANOTHER_PASS; } else if (rc == VINF_SSM_VOTE_DONE_DONT_CALL_AGAIN) { pUnit->fDoneLive = true; Log(("ssmR3DoLiveVoteRun: '%s'/#%u -> VINF_SSM_VOTE_DONE_DONT_CALL_AGAIN (pass=%u)\n", pUnit->szName, pUnit->u32Instance, uPass)); } else { /* * rc is usually VERR_SSM_VOTE_FOR_GIVING_UP here, but we allow * other status codes for better user feed back. However, no * other non-error status is allowed. */ LogRel(("SSM: Error - '%s'/#%u voted %Rrc! (pass=%u)\n", pUnit->szName, pUnit->u32Instance, rc, uPass)); AssertMsgReturn(RT_FAILURE(rc), ("%Rrc; '%s'\n", rc, pUnit->szName), pSSM->rc = VERR_IPE_UNEXPECTED_INFO_STATUS); return pSSM->rc = rc; } } } } if (rcRet == VINF_SUCCESS) { LogRel(("SSM: Step 1 completed after pass %u.\n", uPass)); pSSM->uReportedLivePercent = 100; } else { /* * Work the progress callback. */ if (pSSM->uReportedLivePercent > 100) pSSM->uReportedLivePercent = 0; if ( pSSM->uReportedLivePercent != uPrevPrecent && pSSM->pfnProgress && pSSM->uPercentLive) { long double lrdPct = (long double)pSSM->uReportedLivePercent * pSSM->uPercentLive / 100; unsigned uPct = (unsigned)lrdPct; if (uPct != pSSM->uPercent) { ssmR3LiveControlEmit(pSSM, lrdPct, uPass); pSSM->uPercent = uPct; pSSM->pfnProgress(pVM->pUVM, uPct, pSSM->pvUser); } } } return rcRet; } /** * Calls pfnLiveExec for all units. * * @returns VBox status code (no need to check pSSM->rc). * * @param pVM Pointer to the VM. * @param pSSM The saved state handle. * @param uPass The current pass. */ static int ssmR3LiveDoExecRun(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass) { AssertRC(pSSM->rc); pSSM->rc = VINF_SUCCESS; pSSM->enmOp = SSMSTATE_LIVE_EXEC; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { /* * Skip units without a callback (this is most). */ if ( !pUnit->u.Common.pfnLiveExec || pUnit->fDoneLive) continue; pUnit->offStream = ssmR3StrmTell(&pSSM->Strm); /* * Check for cancellation. */ if (RT_UNLIKELY(ASMAtomicUoReadU32(&(pSSM)->fCancelled) == SSMHANDLE_CANCELLED)) { LogRel(("SSM: Cancelled!\n")); AssertRC(pSSM->rc); return pSSM->rc = VERR_SSM_CANCELLED; } /* * Write data unit header. */ SSMFILEUNITHDRV2 UnitHdr; memcpy(&UnitHdr.szMagic[0], SSMFILEUNITHDR_MAGIC, sizeof(UnitHdr.szMagic)); UnitHdr.offStream = pUnit->offStream; UnitHdr.u32CurStreamCRC = ssmR3StrmCurCRC(&pSSM->Strm); UnitHdr.u32CRC = 0; UnitHdr.u32Version = pUnit->u32Version; UnitHdr.u32Instance = pUnit->u32Instance; UnitHdr.u32Pass = uPass; UnitHdr.fFlags = 0; UnitHdr.cbName = (uint32_t)pUnit->cchName + 1; memcpy(&UnitHdr.szName[0], &pUnit->szName[0], UnitHdr.cbName); UnitHdr.u32CRC = RTCrc32(&UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName])); Log(("SSM: Unit at %#9llx: '%s', instance %u, pass %#x, version %u\n", UnitHdr.offStream, UnitHdr.szName, UnitHdr.u32Instance, UnitHdr.u32Pass, UnitHdr.u32Version)); int rc = ssmR3StrmWrite(&pSSM->Strm, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName])); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed to write unit header. rc=%Rrc\n", rc)); return pSSM->rc = rc; } /* * Call the execute handler. */ ssmR3DataWriteBegin(pSSM); ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLiveExec(pUnit->u.Dev.pDevIns, pSSM, uPass); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLiveExec(pUnit->u.Drv.pDrvIns, pSSM, uPass); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLiveExec(pVM, pSSM, uPass); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLiveExec(pSSM, pUnit->u.External.pvUser, uPass); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; if (RT_FAILURE(rc) && RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; else { if (rc == VINF_SSM_DONT_CALL_AGAIN) pUnit->fDoneLive = true; rc = ssmR3DataFlushBuffer(pSSM); /* will return SSMHANDLE::rc if it is set */ } if (RT_FAILURE(rc)) { LogRel(("SSM: Execute save failed with rc=%Rrc for data unit '%s'/#%u.\n", rc, pUnit->szName, pUnit->u32Instance)); if (RT_SUCCESS(pSSM->rc)) pSSM->rc = rc; return rc; } /* * Write the termination record and flush the compression stream. */ SSMRECTERM TermRec; TermRec.u8TypeAndFlags = SSM_REC_FLAGS_FIXED | SSM_REC_FLAGS_IMPORTANT | SSM_REC_TYPE_TERM; TermRec.cbRec = sizeof(TermRec) - 2; if (pSSM->Strm.fChecksummed) { TermRec.fFlags = SSMRECTERM_FLAGS_CRC32; TermRec.u32StreamCRC = RTCrc32Finish(RTCrc32Process(ssmR3StrmCurCRC(&pSSM->Strm), &TermRec, 2)); } else { TermRec.fFlags = 0; TermRec.u32StreamCRC = 0; } TermRec.cbUnit = pSSM->offUnit + sizeof(TermRec); rc = ssmR3DataWriteRaw(pSSM, &TermRec, sizeof(TermRec)); if (RT_SUCCESS(rc)) rc = ssmR3DataWriteFinish(pSSM); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed terminating unit: %Rrc (pass=%u)\n", rc, uPass)); return pSSM->rc = rc; } } /* for each unit */ return VINF_SUCCESS; } /** * Implements the live exec+vote loop. * * @returns VBox status code (no need to check pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3DoLiveExecVoteLoop(PVM pVM, PSSMHANDLE pSSM) { /* * Calc the max saved state size before we should give up because of insane * amounts of data. */ #define SSM_MAX_GROWTH_FILE 10000 #define SSM_MAX_GROWTH_REMOTE 100000 uint64_t cbSum = 0; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) cbSum += pUnit->cbGuess; uint64_t cbMax = cbSum * (pSSM->pszFilename ? SSM_MAX_GROWTH_FILE : SSM_MAX_GROWTH_REMOTE); AssertLogRelMsgReturn(cbMax > cbSum, ("cbMax=%#RX64, cbSum=%#RX64\n", cbMax, cbSum), pSSM->rc = VERR_OUT_OF_RANGE); if (cbMax < _1G) cbMax = _1G; /* * The pass loop. * * The number of iterations is restricted for two reasons, first * to make sure */ #define SSM_MAX_PASSES _1M for (uint32_t uPass = 0; uPass < SSM_MAX_PASSES; uPass++) { pVM->ssm.s.uPass = uPass; /* * Save state and vote on whether we need more passes or not. */ int rc = ssmR3LiveDoExecRun(pVM, pSSM, uPass); if (RT_FAILURE(rc)) return rc; rc = ssmR3LiveDoVoteRun(pVM, pSSM, uPass); if (rc == VINF_SUCCESS) { pSSM->enmOp = SSMSTATE_LIVE_STEP2; return VINF_SUCCESS; } if (RT_FAILURE(rc)) return rc; /* * Check that we're still within sane data amounts. */ uint64_t cbSaved = ssmR3StrmTell(&pSSM->Strm); if (cbSaved > cbMax) { LogRel(("SSM: Giving up: Exceeded max state size. (cbSaved=%#RX64, cbMax=%#RX64)\n", cbSaved, cbMax)); return pSSM->rc = VERR_SSM_STATE_GREW_TOO_BIG; } /* * Check that the stream is still OK. */ rc = ssmR3StrmCheckAndFlush(&pSSM->Strm); if (RT_FAILURE(rc)) return pSSM->rc = rc; } LogRel(("SSM: Giving up: Too many passes! (%u)\n", SSM_MAX_PASSES)); return pSSM->rc = VERR_SSM_TOO_MANY_PASSES; } /** * Calls pfnLivePrep for all units. * * @returns VBox status code (no need to check pSSM->rc). * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3DoLivePrepRun(PVM pVM, PSSMHANDLE pSSM) { /* * Do the prepare run. */ pSSM->rc = VINF_SUCCESS; pSSM->enmOp = SSMSTATE_SAVE_PREP; for (PSSMUNIT pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { if (pUnit->u.Common.pfnLivePrep) { int rc; ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLivePrep(pUnit->u.Dev.pDevIns, pSSM); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLivePrep(pUnit->u.Drv.pDrvIns, pSSM); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLivePrep(pVM, pSSM); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLivePrep(pSSM, pUnit->u.External.pvUser); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; if (RT_FAILURE(rc) && RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; else rc = pSSM->rc; if (RT_FAILURE(rc)) { LogRel(("SSM: Prepare save failed with rc=%Rrc for data unit '%s.\n", rc, pUnit->szName)); return rc; } } pSSM->cbEstTotal += pUnit->cbGuess; } /* * Work the progress indicator if we got one. */ if (pSSM->pfnProgress) pSSM->pfnProgress(pVM->pUVM, 2, pSSM->pvUser); pSSM->uPercent = 2; return VINF_SUCCESS; } /** * Continue a live state saving operation on the worker thread. * * @returns VBox status. * * @param pSSM The SSM handle returned by SSMR3LiveSave. * * @thread Non-EMT thread. Will involve the EMT at the end of the operation. */ VMMR3_INT_DECL(int) SSMR3LiveDoStep1(PSSMHANDLE pSSM) { LogFlow(("SSMR3LiveDoStep1: pSSM=%p\n", pSSM)); /* * Validate input. */ AssertPtrReturn(pSSM, VERR_INVALID_POINTER); PVM pVM = pSSM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); VM_ASSERT_OTHER_THREAD(pVM); AssertMsgReturn( pSSM->enmAfter == SSMAFTER_DESTROY || pSSM->enmAfter == SSMAFTER_CONTINUE || pSSM->enmAfter == SSMAFTER_TELEPORT, ("%d\n", pSSM->enmAfter), VERR_INVALID_PARAMETER); AssertMsgReturn(pSSM->enmOp == SSMSTATE_LIVE_STEP1, ("%d\n", pSSM->enmOp), VERR_INVALID_STATE); AssertRCReturn(pSSM->rc, pSSM->rc); /* * Do the prep run, then the exec+vote cycle. */ int rc = ssmR3DoLivePrepRun(pVM, pSSM); if (RT_SUCCESS(rc)) rc = ssmR3DoLiveExecVoteLoop(pVM, pSSM); return rc; } /** * Start saving the live state. * * Call SSMR3LiveDoStep1, SSMR3LiveDoStep2 and finally SSMR3LiveDone on success. * SSMR3LiveDone should be called even if SSMR3LiveDoStep1 or SSMR3LiveDoStep2 * fails. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param cMsMaxDowntime The maximum downtime given as milliseconds. * @param pszFilename Name of the file to save the state in. This string * must remain valid until SSMR3LiveDone is called. * Must be NULL if pStreamOps is used. * @param pStreamOps The stream method table. NULL if pszFilename is * used. * @param pvStreamOpsUser The user argument to the stream methods. * @param enmAfter What is planned after a successful save operation. * @param pfnProgress Progress callback. Optional. * @param pvProgressUser User argument for the progress callback. * * @thread EMT0 */ VMMR3_INT_DECL(int) SSMR3LiveSave(PVM pVM, uint32_t cMsMaxDowntime, const char *pszFilename, PCSSMSTRMOPS pStreamOps, void *pvStreamOpsUser, SSMAFTER enmAfter, PFNVMPROGRESS pfnProgress, void *pvProgressUser, PSSMHANDLE *ppSSM) { LogFlow(("SSMR3LiveSave: cMsMaxDowntime=%u pszFilename=%p:{%s} pStreamOps=%p pvStreamOpsUser=%p enmAfter=%d pfnProgress=%p pvProgressUser=%p\n", cMsMaxDowntime, pszFilename, pszFilename, pStreamOps, pvStreamOpsUser, enmAfter, pfnProgress, pvProgressUser)); VM_ASSERT_EMT0(pVM); /* * Validate input. */ AssertMsgReturn( enmAfter == SSMAFTER_DESTROY || enmAfter == SSMAFTER_CONTINUE || enmAfter == SSMAFTER_TELEPORT, ("%d\n", enmAfter), VERR_INVALID_PARAMETER); AssertReturn(!pszFilename != !pStreamOps, VERR_INVALID_PARAMETER); if (pStreamOps) { AssertReturn(pStreamOps->u32Version == SSMSTRMOPS_VERSION, VERR_INVALID_MAGIC); AssertReturn(pStreamOps->u32EndVersion == SSMSTRMOPS_VERSION, VERR_INVALID_MAGIC); AssertReturn(pStreamOps->pfnWrite, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnRead, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnSeek, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnTell, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnSize, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnClose, VERR_INVALID_PARAMETER); } /* * Create the saved state file and handle. * * Note that there might be quite some work to do after executing the saving, * so we reserve 20% for the 'Done' period. */ PSSMHANDLE pSSM; int rc = ssmR3SaveDoCreateFile(pVM, pszFilename, pStreamOps, pvStreamOpsUser, enmAfter, pfnProgress, pvProgressUser, &pSSM); if (RT_FAILURE(rc)) return rc; pSSM->uPercentLive = 93; pSSM->uPercentPrepare = 2; pSSM->uPercentDone = 2; pSSM->fLiveSave = true; pSSM->u.Write.cMsMaxDowntime = cMsMaxDowntime; /* * Write the saved state stream header and do the prep run for live saving. */ Log(("SSM: Starting state save to file '%s'...\n", pszFilename)); ssmR3StrmStartIoThread(&pSSM->Strm); rc = ssmR3WriteHeaderAndClearPerUnitData(pVM, pSSM); if (RT_SUCCESS(rc)) { /* * Return and let the requestor thread do the pfnLiveExec/Vote part * via SSMR3SaveFinishLive */ pSSM->enmOp = SSMSTATE_LIVE_STEP1; ssmR3SetCancellable(pVM, pSSM, true); *ppSSM = pSSM; return VINF_SUCCESS; } /* bail out. */ int rc2 = ssmR3StrmClose(&pSSM->Strm, pSSM->rc == VERR_SSM_CANCELLED); RTMemFree(pSSM); rc2 = RTFileDelete(pszFilename); AssertRC(rc2); return rc; } #endif /* !SSM_STANDALONE */ /* ... 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Loading and reading starts here ... */ #ifndef SSM_STANDALONE /** * Closes the decompressor of a data unit. * * @returns pSSM->rc. * @param pSSM The saved state handle. */ static int ssmR3DataReadFinishV1(PSSMHANDLE pSSM) { if (pSSM->u.Read.pZipDecompV1) { int rc = RTZipDecompDestroy(pSSM->u.Read.pZipDecompV1); AssertRC(rc); pSSM->u.Read.pZipDecompV1 = NULL; } return pSSM->rc; } #endif /* !SSM_STANDALONE */ /** * Callback for reading compressed data into the input buffer of the * decompressor, for saved file format version 1. * * @returns VBox status code. Set pSSM->rc on error. * @param pvSSM The SSM handle. * @param pvBuf Where to store the compressed data. * @param cbBuf Size of the buffer. * @param pcbRead Number of bytes actually stored in the buffer. */ static DECLCALLBACK(int) ssmR3ReadInV1(void *pvSSM, void *pvBuf, size_t cbBuf, size_t *pcbRead) { PSSMHANDLE pSSM = (PSSMHANDLE)pvSSM; size_t cbRead = cbBuf; if (pSSM->cbUnitLeftV1 < cbBuf) cbRead = (size_t)pSSM->cbUnitLeftV1; if (cbRead) { //Log2(("ssmR3ReadInV1: %#010llx cbBug=%#x cbRead=%#x\n", ssmR3StrmTell(&pSSM->Strm), cbBuf, cbRead)); int rc = ssmR3StrmRead(&pSSM->Strm, pvBuf, cbRead); if (RT_SUCCESS(rc)) { pSSM->cbUnitLeftV1 -= cbRead; if (pcbRead) *pcbRead = cbRead; ssmR3ProgressByByte(pSSM, cbRead); return VINF_SUCCESS; } return pSSM->rc = rc; } if (pSSM->enmAfter != SSMAFTER_DEBUG_IT) AssertMsgFailed(("SSM: attempted reading more than the unit!\n")); return pSSM->rc = VERR_SSM_LOADED_TOO_MUCH; } /** * Internal read worker for reading data from a version 1 unit. * * @returns VBox status code, pSSM->rc is set on error. * * @param pSSM The saved state handle. * @param pvBuf Where to store the read data. * @param cbBuf Number of bytes to read. */ static int ssmR3DataReadV1(PSSMHANDLE pSSM, void *pvBuf, size_t cbBuf) { /* * Open the decompressor on the first read. */ if (!pSSM->u.Read.pZipDecompV1) { pSSM->rc = RTZipDecompCreate(&pSSM->u.Read.pZipDecompV1, pSSM, ssmR3ReadInV1); if (RT_FAILURE(pSSM->rc)) return pSSM->rc; } /* * Do the requested read. */ int rc = pSSM->rc = RTZipDecompress(pSSM->u.Read.pZipDecompV1, pvBuf, cbBuf, NULL); if (RT_SUCCESS(rc)) { Log2(("ssmR3DataRead: pvBuf=%p cbBuf=%#x offUnit=%#llx %.*Rhxs%s\n", pvBuf, cbBuf, pSSM->offUnit, RT_MIN(cbBuf, SSM_LOG_BYTES), pvBuf, cbBuf > SSM_LOG_BYTES ? "..." : "")); pSSM->offUnit += cbBuf; pSSM->offUnitUser += cbBuf; return VINF_SUCCESS; } AssertMsgFailed(("rc=%Rrc cbBuf=%#x\n", rc, cbBuf)); return rc; } /** * Creates the decompressor for the data unit. * * pSSM->rc will be set on error. * * @param pSSM The saved state handle. */ static void ssmR3DataReadBeginV2(PSSMHANDLE pSSM) { Assert(!pSSM->u.Read.cbDataBuffer || pSSM->u.Read.cbDataBuffer == pSSM->u.Read.offDataBuffer); Assert(!pSSM->u.Read.cbRecLeft); pSSM->offUnit = 0; pSSM->offUnitUser = 0; pSSM->u.Read.cbRecLeft = 0; pSSM->u.Read.cbDataBuffer = 0; pSSM->u.Read.offDataBuffer = 0; pSSM->u.Read.fEndOfData = false; pSSM->u.Read.u8TypeAndFlags = 0; } #ifndef SSM_STANDALONE /** * Checks for the termination record and closes the decompressor. * * pSSM->rc will be set on error. * * @returns pSSM->rc. * @param pSSM The saved state handle. */ static int ssmR3DataReadFinishV2(PSSMHANDLE pSSM) { /* * If we haven't encountered the end of the record, it must be the next one. */ int rc = pSSM->rc; if ( !pSSM->u.Read.fEndOfData && RT_SUCCESS(rc)) { if ( pSSM->u.Read.cbDataBuffer != pSSM->u.Read.offDataBuffer && pSSM->u.Read.cbDataBuffer > 0) { LogRel(("SSM: At least %#x bytes left to read\n", pSSM->u.Read.cbDataBuffer - pSSM->u.Read.offDataBuffer)); rc = VERR_SSM_LOADED_TOO_LITTLE; } else { rc = ssmR3DataReadRecHdrV2(pSSM); if ( RT_SUCCESS(rc) && !pSSM->u.Read.fEndOfData) { LogRel(("SSM: At least %#x bytes left to read\n", pSSM->u.Read.cbDataBuffer)); rc = VERR_SSM_LOADED_TOO_LITTLE; AssertFailed(); } } pSSM->rc = rc; } return rc; } #endif /* !SSM_STANDALONE */ /** * Read raw record bytes, work the progress indicator and unit offset. * * @returns VBox status code. Does NOT set pSSM->rc. * @param pSSM The saved state handle. * @param pvBuf Where to put the bits * @param cbBuf How many bytes to read. */ DECLINLINE(int) ssmR3DataReadV2Raw(PSSMHANDLE pSSM, void *pvBuf, size_t cbToRead) { int rc = ssmR3StrmRead(&pSSM->Strm, pvBuf, cbToRead); if (RT_SUCCESS(rc)) { pSSM->offUnit += cbToRead; ssmR3ProgressByByte(pSSM, cbToRead); return VINF_SUCCESS; } if (rc == VERR_SSM_CANCELLED) return rc; if (pSSM->enmAfter != SSMAFTER_DEBUG_IT && rc == VERR_EOF) AssertMsgFailedReturn(("SSM: attempted reading more than the unit! rc=%Rrc\n", rc), VERR_SSM_LOADED_TOO_MUCH); return VERR_SSM_STREAM_ERROR; } /** * Reads and checks the LZF "header". * * @returns VBox status code. Sets pSSM->rc on error. * @param pSSM The saved state handle.. * @param pcbDecompr Where to store the size of the decompressed data. */ DECLINLINE(int) ssmR3DataReadV2RawLzfHdr(PSSMHANDLE pSSM, uint32_t *pcbDecompr) { *pcbDecompr = 0; /* shuts up gcc. */ AssertLogRelMsgReturn( pSSM->u.Read.cbRecLeft > 1 && pSSM->u.Read.cbRecLeft <= RT_SIZEOFMEMB(SSMHANDLE, u.Read.abComprBuffer) + 2, ("%#x\n", pSSM->u.Read.cbRecLeft), VERR_SSM_INTEGRITY_DECOMPRESSION); uint8_t cKB; int rc = ssmR3DataReadV2Raw(pSSM, &cKB, 1); if (RT_FAILURE(rc)) return pSSM->rc = rc; pSSM->u.Read.cbRecLeft -= sizeof(cKB); uint32_t cbDecompr = (uint32_t)cKB * _1K; AssertLogRelMsgReturn( cbDecompr >= pSSM->u.Read.cbRecLeft && cbDecompr <= RT_SIZEOFMEMB(SSMHANDLE, u.Read.abDataBuffer), ("%#x\n", cbDecompr), VERR_SSM_INTEGRITY_DECOMPRESSION); *pcbDecompr = cbDecompr; return VINF_SUCCESS; } /** * Reads an LZF block from the stream and decompresses into the specified * buffer. * * @returns VBox status code. Sets pSSM->rc on error. * @param SSM The saved state handle. * @param pvDst Pointer to the output buffer. * @param cbDecompr The size of the decompressed data. */ static int ssmR3DataReadV2RawLzf(PSSMHANDLE pSSM, void *pvDst, size_t cbDecompr) { int rc; uint32_t cbCompr = pSSM->u.Read.cbRecLeft; pSSM->u.Read.cbRecLeft = 0; /* * Try use the stream buffer directly to avoid copying things around. */ uint8_t const *pb = ssmR3StrmReadDirect(&pSSM->Strm, cbCompr); if (pb) { pSSM->offUnit += cbCompr; ssmR3ProgressByByte(pSSM, cbCompr); } else { rc = ssmR3DataReadV2Raw(pSSM, &pSSM->u.Read.abComprBuffer[0], cbCompr); if (RT_FAILURE(rc)) return pSSM->rc = rc; pb = &pSSM->u.Read.abComprBuffer[0]; } /* * Decompress it. */ size_t cbDstActual; rc = RTZipBlockDecompress(RTZIPTYPE_LZF, 0 /*fFlags*/, pb, cbCompr, NULL /*pcbSrcActual*/, pvDst, cbDecompr, &cbDstActual); if (RT_SUCCESS(rc)) { AssertLogRelMsgReturn(cbDstActual == cbDecompr, ("%#x %#x\n", cbDstActual, cbDecompr), VERR_SSM_INTEGRITY_DECOMPRESSION); return VINF_SUCCESS; } AssertLogRelMsgFailed(("cbCompr=%#x cbDecompr=%#x rc=%Rrc\n", cbCompr, cbDecompr, rc)); return pSSM->rc = VERR_SSM_INTEGRITY_DECOMPRESSION; } /** * Reads and checks the raw zero "header". * * @returns VBox status code. Sets pSSM->rc on error. * @param pSSM The saved state handle.. * @param pcbDecompr Where to store the size of the zero data. */ DECLINLINE(int) ssmR3DataReadV2RawZeroHdr(PSSMHANDLE pSSM, uint32_t *pcbZero) { *pcbZero = 0; /* shuts up gcc. */ AssertLogRelMsgReturn(pSSM->u.Read.cbRecLeft == 1, ("%#x\n", pSSM->u.Read.cbRecLeft), VERR_SSM_INTEGRITY_DECOMPRESSION); uint8_t cKB; int rc = ssmR3DataReadV2Raw(pSSM, &cKB, 1); if (RT_FAILURE(rc)) return pSSM->rc = rc; pSSM->u.Read.cbRecLeft = 0; uint32_t cbZero = (uint32_t)cKB * _1K; AssertLogRelMsgReturn(cbZero <= RT_SIZEOFMEMB(SSMHANDLE, u.Read.abDataBuffer), ("%#x\n", cbZero), VERR_SSM_INTEGRITY_DECOMPRESSION); *pcbZero = cbZero; return VINF_SUCCESS; } /** * Worker for reading the record header. * * It sets pSSM->u.Read.cbRecLeft, pSSM->u.Read.u8TypeAndFlags and * pSSM->u.Read.fEndOfData. When a termination record is encounter, it will be * read in full and validated, the fEndOfData indicator is set, and VINF_SUCCESS * is returned. * * @returns VBox status code. Does not set pSSM->rc. * @param pSSM The saved state handle. */ static int ssmR3DataReadRecHdrV2(PSSMHANDLE pSSM) { AssertLogRelReturn(!pSSM->u.Read.fEndOfData, VERR_SSM_LOADED_TOO_MUCH); /* * Read the two mandatory bytes. */ uint8_t abHdr[8]; int rc = ssmR3DataReadV2Raw(pSSM, abHdr, 2); if (RT_FAILURE(rc)) return rc; /* * Validate the first byte and check for the termination records. */ pSSM->u.Read.u8TypeAndFlags = abHdr[0]; AssertLogRelMsgReturn(SSM_REC_ARE_TYPE_AND_FLAGS_VALID(abHdr[0]), ("%#x %#x\n", abHdr[0], abHdr[1]), VERR_SSM_INTEGRITY_REC_HDR); if ((abHdr[0] & SSM_REC_TYPE_MASK) == SSM_REC_TYPE_TERM) { pSSM->u.Read.cbRecLeft = 0; pSSM->u.Read.fEndOfData = true; AssertLogRelMsgReturn(abHdr[1] == sizeof(SSMRECTERM) - 2, ("%#x\n", abHdr[1]), VERR_SSM_INTEGRITY_REC_TERM); AssertLogRelMsgReturn(abHdr[0] & SSM_REC_FLAGS_IMPORTANT, ("%#x\n", abHdr[0]), VERR_SSM_INTEGRITY_REC_TERM); /* get the rest */ uint32_t u32StreamCRC = ssmR3StrmFinalCRC(&pSSM->Strm); SSMRECTERM TermRec; rc = ssmR3DataReadV2Raw(pSSM, (uint8_t *)&TermRec + 2, sizeof(SSMRECTERM) - 2); if (RT_FAILURE(rc)) return rc; /* validate integrity */ AssertLogRelMsgReturn(TermRec.cbUnit == pSSM->offUnit, ("cbUnit=%#llx offUnit=%#llx\n", TermRec.cbUnit, pSSM->offUnit), VERR_SSM_INTEGRITY_REC_TERM); AssertLogRelMsgReturn(!(TermRec.fFlags & ~SSMRECTERM_FLAGS_CRC32), ("%#x\n", TermRec.fFlags), VERR_SSM_INTEGRITY_REC_TERM); if (!(TermRec.fFlags & SSMRECTERM_FLAGS_CRC32)) AssertLogRelMsgReturn(TermRec.u32StreamCRC == 0, ("%#x\n", TermRec.u32StreamCRC), VERR_SSM_INTEGRITY_REC_TERM); else if (pSSM->Strm.fChecksummed) AssertLogRelMsgReturn(TermRec.u32StreamCRC == u32StreamCRC, ("%#x, %#x\n", TermRec.u32StreamCRC, u32StreamCRC), VERR_SSM_INTEGRITY_REC_TERM_CRC); Log3(("ssmR3DataReadRecHdrV2: %08llx|%08llx: TERM\n", ssmR3StrmTell(&pSSM->Strm) - sizeof(SSMRECTERM), pSSM->offUnit)); return VINF_SUCCESS; } /* * Figure the size. The 2nd byte is encoded in UTF-8 fashion, so this * is can be highly enjoyable. */ uint32_t cbHdr = 2; uint32_t cb = abHdr[1]; if (!(cb & 0x80)) pSSM->u.Read.cbRecLeft = cb; else { /* * Need more data. Figure how much and read it. */ if (!(cb & RT_BIT(5))) cb = 2; else if (!(cb & RT_BIT(4))) cb = 3; else if (!(cb & RT_BIT(3))) cb = 4; else if (!(cb & RT_BIT(2))) cb = 5; else if (!(cb & RT_BIT(1))) cb = 6; else AssertLogRelMsgFailedReturn(("Invalid record size byte: %#x\n", cb), VERR_SSM_INTEGRITY_REC_HDR); cbHdr = cb + 1; rc = ssmR3DataReadV2Raw(pSSM, &abHdr[2], cb - 1); if (RT_FAILURE(rc)) return rc; /* * Validate what we've read. */ switch (cb) { case 6: AssertLogRelMsgReturn((abHdr[6] & 0xc0) == 0x80, ("6/%u: %.*Rhxs\n", cb, cb + 1, &abHdr[0]), VERR_SSM_INTEGRITY_REC_HDR); case 5: AssertLogRelMsgReturn((abHdr[5] & 0xc0) == 0x80, ("5/%u: %.*Rhxs\n", cb, cb + 1, &abHdr[0]), VERR_SSM_INTEGRITY_REC_HDR); case 4: AssertLogRelMsgReturn((abHdr[4] & 0xc0) == 0x80, ("4/%u: %.*Rhxs\n", cb, cb + 1, &abHdr[0]), VERR_SSM_INTEGRITY_REC_HDR); case 3: AssertLogRelMsgReturn((abHdr[3] & 0xc0) == 0x80, ("3/%u: %.*Rhxs\n", cb, cb + 1, &abHdr[0]), VERR_SSM_INTEGRITY_REC_HDR); case 2: AssertLogRelMsgReturn((abHdr[2] & 0xc0) == 0x80, ("2/%u: %.*Rhxs\n", cb, cb + 1, &abHdr[0]), VERR_SSM_INTEGRITY_REC_HDR); break; default: return VERR_IPE_NOT_REACHED_DEFAULT_CASE; } /* * Decode it and validate the range. */ switch (cb) { case 6: cb = (abHdr[6] & 0x3f) | ((uint32_t)(abHdr[5] & 0x3f) << 6) | ((uint32_t)(abHdr[4] & 0x3f) << 12) | ((uint32_t)(abHdr[3] & 0x3f) << 18) | ((uint32_t)(abHdr[2] & 0x3f) << 24) | ((uint32_t)(abHdr[1] & 0x01) << 30); AssertLogRelMsgReturn(cb >= 0x04000000 && cb <= 0x7fffffff, ("cb=%#x\n", cb), VERR_SSM_INTEGRITY_REC_HDR); break; case 5: cb = (abHdr[5] & 0x3f) | ((uint32_t)(abHdr[4] & 0x3f) << 6) | ((uint32_t)(abHdr[3] & 0x3f) << 12) | ((uint32_t)(abHdr[2] & 0x3f) << 18) | ((uint32_t)(abHdr[1] & 0x03) << 24); AssertLogRelMsgReturn(cb >= 0x00200000 && cb <= 0x03ffffff, ("cb=%#x\n", cb), VERR_SSM_INTEGRITY_REC_HDR); break; case 4: cb = (abHdr[4] & 0x3f) | ((uint32_t)(abHdr[3] & 0x3f) << 6) | ((uint32_t)(abHdr[2] & 0x3f) << 12) | ((uint32_t)(abHdr[1] & 0x07) << 18); AssertLogRelMsgReturn(cb >= 0x00010000 && cb <= 0x001fffff, ("cb=%#x\n", cb), VERR_SSM_INTEGRITY_REC_HDR); break; case 3: cb = (abHdr[3] & 0x3f) | ((uint32_t)(abHdr[2] & 0x3f) << 6) | ((uint32_t)(abHdr[1] & 0x0f) << 12); #if 0 /* disabled to optimize buffering */ AssertLogRelMsgReturn(cb >= 0x00000800 && cb <= 0x0000ffff, ("cb=%#x\n", cb), VERR_SSM_INTEGRITY_REC_HDR); #endif break; case 2: cb = (abHdr[2] & 0x3f) | ((uint32_t)(abHdr[1] & 0x1f) << 6); #if 0 /* disabled to optimize buffering */ AssertLogRelMsgReturn(cb >= 0x00000080 && cb <= 0x000007ff, ("cb=%#x\n", cb), VERR_SSM_INTEGRITY_REC_HDR); #endif break; default: return VERR_IPE_NOT_REACHED_DEFAULT_CASE; } pSSM->u.Read.cbRecLeft = cb; } Log3(("ssmR3DataReadRecHdrV2: %08llx|%08llx/%08x: Type=%02x fImportant=%RTbool cbHdr=%u\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pSSM->u.Read.cbRecLeft, pSSM->u.Read.u8TypeAndFlags & SSM_REC_TYPE_MASK, !!(pSSM->u.Read.u8TypeAndFlags & SSM_REC_FLAGS_IMPORTANT), cbHdr )); NOREF(cbHdr); return VINF_SUCCESS; } /** * Buffer miss, do an unbuffered read. * * @param pSSM The saved state handle. * @param pvBuf Where to store the read data. * @param cbBuf Number of bytes to read. */ static int ssmR3DataReadUnbufferedV2(PSSMHANDLE pSSM, void *pvBuf, size_t cbBuf) { void const *pvBufOrg = pvBuf; NOREF(pvBufOrg); size_t const cbBufOrg = cbBuf; NOREF(cbBufOrg); /* * Copy out what we've got in the buffer. */ uint32_t off = pSSM->u.Read.offDataBuffer; int32_t cbInBuffer = pSSM->u.Read.cbDataBuffer - off; Log4(("ssmR3DataReadUnbufferedV2: %08llx|%08llx/%08x/%08x: cbBuf=%#x\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pSSM->u.Read.cbRecLeft, cbInBuffer, cbBufOrg)); if (cbInBuffer > 0) { uint32_t const cbToCopy = (uint32_t)cbInBuffer; Assert(cbBuf > cbToCopy); memcpy(pvBuf, &pSSM->u.Read.abDataBuffer[off], cbToCopy); pvBuf = (uint8_t *)pvBuf + cbToCopy; cbBuf -= cbToCopy; pSSM->u.Read.cbDataBuffer = 0; pSSM->u.Read.offDataBuffer = 0; } /* * Read data. */ do { /* * Read the next record header if no more data. */ if (!pSSM->u.Read.cbRecLeft) { int rc = ssmR3DataReadRecHdrV2(pSSM); if (RT_FAILURE(rc)) return pSSM->rc = rc; } AssertLogRelMsgReturn(!pSSM->u.Read.fEndOfData, ("cbBuf=%zu", cbBuf), pSSM->rc = VERR_SSM_LOADED_TOO_MUCH); /* * Read data from the current record. */ uint32_t cbToRead; switch (pSSM->u.Read.u8TypeAndFlags & SSM_REC_TYPE_MASK) { case SSM_REC_TYPE_RAW: { cbToRead = (uint32_t)RT_MIN(cbBuf, pSSM->u.Read.cbRecLeft); int rc = ssmR3DataReadV2Raw(pSSM, pvBuf, cbToRead); if (RT_FAILURE(rc)) return pSSM->rc = rc; pSSM->u.Read.cbRecLeft -= cbToRead; break; } case SSM_REC_TYPE_RAW_LZF: { int rc = ssmR3DataReadV2RawLzfHdr(pSSM, &cbToRead); if (RT_FAILURE(rc)) return rc; if (cbToRead <= cbBuf) { rc = ssmR3DataReadV2RawLzf(pSSM, pvBuf, cbToRead); if (RT_FAILURE(rc)) return rc; } else { /* The output buffer is too small, use the data buffer. */ rc = ssmR3DataReadV2RawLzf(pSSM, &pSSM->u.Read.abDataBuffer[0], cbToRead); if (RT_FAILURE(rc)) return rc; pSSM->u.Read.cbDataBuffer = cbToRead; cbToRead = (uint32_t)cbBuf; pSSM->u.Read.offDataBuffer = cbToRead; memcpy(pvBuf, &pSSM->u.Read.abDataBuffer[0], cbToRead); } break; } case SSM_REC_TYPE_RAW_ZERO: { int rc = ssmR3DataReadV2RawZeroHdr(pSSM, &cbToRead); if (RT_FAILURE(rc)) return rc; if (cbToRead > cbBuf) { /* Spill the remainder into the data buffer. */ memset(&pSSM->u.Read.abDataBuffer[0], 0, cbToRead - cbBuf); pSSM->u.Read.cbDataBuffer = cbToRead - (uint32_t)cbBuf; pSSM->u.Read.offDataBuffer = 0; cbToRead = (uint32_t)cbBuf; } memset(pvBuf, 0, cbToRead); break; } default: AssertMsgFailedReturn(("%x\n", pSSM->u.Read.u8TypeAndFlags), VERR_SSM_BAD_REC_TYPE); } pSSM->offUnitUser += cbToRead; cbBuf -= cbToRead; pvBuf = (uint8_t *)pvBuf + cbToRead; } while (cbBuf > 0); Log4(("ssmR3DataReadUnBufferedV2: %08llx|%08llx/%08x/%08x: cbBuf=%#x %.*Rhxs%s\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pSSM->u.Read.cbRecLeft, 0, cbBufOrg, RT_MIN(SSM_LOG_BYTES, cbBufOrg), pvBufOrg, cbBufOrg > SSM_LOG_BYTES ? "..." : "")); return VINF_SUCCESS; } /** * Buffer miss, do a buffered read. * * @returns VBox status code. Sets pSSM->rc on error. * * @param pSSM The saved state handle. * @param pvBuf Where to store the read data. * @param cbBuf Number of bytes to read. */ static int ssmR3DataReadBufferedV2(PSSMHANDLE pSSM, void *pvBuf, size_t cbBuf) { void const *pvBufOrg = pvBuf; NOREF(pvBufOrg); size_t const cbBufOrg = cbBuf; NOREF(cbBufOrg); /* * Copy out what we've got in the buffer. */ uint32_t off = pSSM->u.Read.offDataBuffer; int32_t cbInBuffer = pSSM->u.Read.cbDataBuffer - off; Log4(("ssmR3DataReadBufferedV2: %08llx|%08llx/%08x/%08x: cbBuf=%#x\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pSSM->u.Read.cbRecLeft, cbInBuffer, cbBufOrg)); if (cbInBuffer > 0) { uint32_t const cbToCopy = (uint32_t)cbInBuffer; Assert(cbBuf > cbToCopy); memcpy(pvBuf, &pSSM->u.Read.abDataBuffer[off], cbToCopy); pvBuf = (uint8_t *)pvBuf + cbToCopy; cbBuf -= cbToCopy; pSSM->offUnitUser += cbToCopy; pSSM->u.Read.cbDataBuffer = 0; pSSM->u.Read.offDataBuffer = 0; } /* * Buffer more data. */ do { /* * Read the next record header if no more data. */ if (!pSSM->u.Read.cbRecLeft) { int rc = ssmR3DataReadRecHdrV2(pSSM); if (RT_FAILURE(rc)) return pSSM->rc = rc; } AssertLogRelMsgReturn(!pSSM->u.Read.fEndOfData, ("cbBuf=%zu", cbBuf), pSSM->rc = VERR_SSM_LOADED_TOO_MUCH); /* * Read data from the current record. * LATER: optimize by reading directly into the output buffer for some cases. */ uint32_t cbToRead; switch (pSSM->u.Read.u8TypeAndFlags & SSM_REC_TYPE_MASK) { case SSM_REC_TYPE_RAW: { cbToRead = RT_MIN(sizeof(pSSM->u.Read.abDataBuffer), pSSM->u.Read.cbRecLeft); int rc = ssmR3DataReadV2Raw(pSSM, &pSSM->u.Read.abDataBuffer[0], cbToRead); if (RT_FAILURE(rc)) return pSSM->rc = rc; pSSM->u.Read.cbRecLeft -= cbToRead; pSSM->u.Read.cbDataBuffer = cbToRead; break; } case SSM_REC_TYPE_RAW_LZF: { int rc = ssmR3DataReadV2RawLzfHdr(pSSM, &cbToRead); if (RT_FAILURE(rc)) return rc; rc = ssmR3DataReadV2RawLzf(pSSM, &pSSM->u.Read.abDataBuffer[0], cbToRead); if (RT_FAILURE(rc)) return rc; pSSM->u.Read.cbDataBuffer = cbToRead; break; } case SSM_REC_TYPE_RAW_ZERO: { int rc = ssmR3DataReadV2RawZeroHdr(pSSM, &cbToRead); if (RT_FAILURE(rc)) return rc; memset(&pSSM->u.Read.abDataBuffer[0], 0, cbToRead); pSSM->u.Read.cbDataBuffer = cbToRead; break; } default: AssertMsgFailedReturn(("%x\n", pSSM->u.Read.u8TypeAndFlags), VERR_SSM_BAD_REC_TYPE); } /*pSSM->u.Read.offDataBuffer = 0;*/ /* * Copy data from the buffer. */ uint32_t cbToCopy = (uint32_t)RT_MIN(cbBuf, cbToRead); memcpy(pvBuf, &pSSM->u.Read.abDataBuffer[0], cbToCopy); cbBuf -= cbToCopy; pvBuf = (uint8_t *)pvBuf + cbToCopy; pSSM->offUnitUser += cbToCopy; pSSM->u.Read.offDataBuffer = cbToCopy; } while (cbBuf > 0); Log4(("ssmR3DataReadBufferedV2: %08llx|%08llx/%08x/%08x: cbBuf=%#x %.*Rhxs%s\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pSSM->u.Read.cbRecLeft, pSSM->u.Read.cbDataBuffer - pSSM->u.Read.offDataBuffer, cbBufOrg, RT_MIN(SSM_LOG_BYTES, cbBufOrg), pvBufOrg, cbBufOrg > SSM_LOG_BYTES ? "..." : "")); return VINF_SUCCESS; } /** * Inlined worker that handles format checks and buffered reads. * * @param pSSM The saved state handle. * @param pvBuf Where to store the read data. * @param cbBuf Number of bytes to read. */ DECLINLINE(int) ssmR3DataRead(PSSMHANDLE pSSM, void *pvBuf, size_t cbBuf) { /* * Fend off previous errors and V1 data units. */ if (RT_FAILURE(pSSM->rc)) return pSSM->rc; if (RT_UNLIKELY(pSSM->u.Read.uFmtVerMajor == 1)) return ssmR3DataReadV1(pSSM, pvBuf, cbBuf); /* * Check if the requested data is buffered. */ uint32_t off = pSSM->u.Read.offDataBuffer; if ( off + cbBuf > pSSM->u.Read.cbDataBuffer || cbBuf > sizeof(pSSM->u.Read.abDataBuffer)) { if (cbBuf <= sizeof(pSSM->u.Read.abDataBuffer) / 8) return ssmR3DataReadBufferedV2(pSSM, pvBuf, cbBuf); return ssmR3DataReadUnbufferedV2(pSSM, pvBuf, cbBuf); } memcpy(pvBuf, &pSSM->u.Read.abDataBuffer[off], cbBuf); pSSM->u.Read.offDataBuffer = off + (uint32_t)cbBuf; pSSM->offUnitUser += cbBuf; Log4((cbBuf ? "ssmR3DataRead: %08llx|%08llx/%08x/%08x: cbBuf=%#x %.*Rhxs%s\n" : "ssmR3DataRead: %08llx|%08llx/%08x/%08x: cbBuf=%#x\n", ssmR3StrmTell(&pSSM->Strm), pSSM->offUnit, pSSM->u.Read.cbRecLeft, pSSM->u.Read.cbDataBuffer - pSSM->u.Read.offDataBuffer, cbBuf, RT_MIN(SSM_LOG_BYTES, cbBuf), pvBuf, cbBuf > SSM_LOG_BYTES ? "..." : "")); return VINF_SUCCESS; } /** * Gets a structure. * * @returns VBox status code. * @param pSSM The saved state handle. * @param pvStruct The structure address. * @param paFields The array of structure fields descriptions. * The array must be terminated by a SSMFIELD_ENTRY_TERM(). */ VMMR3DECL(int) SSMR3GetStruct(PSSMHANDLE pSSM, void *pvStruct, PCSSMFIELD paFields) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); AssertPtr(pvStruct); AssertPtr(paFields); /* begin marker. */ uint32_t u32Magic; int rc = SSMR3GetU32(pSSM, &u32Magic); if (RT_FAILURE(rc)) return rc; AssertMsgReturn(u32Magic == SSMR3STRUCT_BEGIN, ("u32Magic=%#RX32\n", u32Magic), VERR_SSM_STRUCTURE_MAGIC); /* get the fields */ for (PCSSMFIELD pCur = paFields; pCur->cb != UINT32_MAX && pCur->off != UINT32_MAX; pCur++) { uint8_t *pbField = (uint8_t *)pvStruct + pCur->off; switch ((uintptr_t)pCur->pfnGetPutOrTransformer) { case SSMFIELDTRANS_NO_TRANSFORMATION: rc = ssmR3DataRead(pSSM, pbField, pCur->cb); break; case SSMFIELDTRANS_GCPTR: AssertMsgReturn(pCur->cb == sizeof(RTGCPTR), ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3GetGCPtr(pSSM, (PRTGCPTR)pbField); break; case SSMFIELDTRANS_GCPHYS: AssertMsgReturn(pCur->cb == sizeof(RTGCPHYS), ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3GetGCPhys(pSSM, (PRTGCPHYS)pbField); break; case SSMFIELDTRANS_RCPTR: AssertMsgReturn(pCur->cb == sizeof(RTRCPTR), ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3GetRCPtr(pSSM, (PRTRCPTR)pbField); break; case SSMFIELDTRANS_RCPTR_ARRAY: { uint32_t const cEntries = pCur->cb / sizeof(RTRCPTR); AssertMsgReturn(pCur->cb == cEntries * sizeof(RTRCPTR) && cEntries, ("%#x (%s)\n", pCur->cb, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = VINF_SUCCESS; for (uint32_t i = 0; i < cEntries && RT_SUCCESS(rc); i++) rc = SSMR3GetRCPtr(pSSM, &((PRTRCPTR)pbField)[i]); break; } default: AssertMsgFailedReturn(("%#x\n", pCur->pfnGetPutOrTransformer), VERR_SSM_FIELD_COMPLEX); } if (RT_FAILURE(rc)) return rc; } /* end marker */ rc = SSMR3GetU32(pSSM, &u32Magic); if (RT_FAILURE(rc)) return rc; AssertMsgReturn(u32Magic == SSMR3STRUCT_END, ("u32Magic=%#RX32\n", u32Magic), VERR_SSM_STRUCTURE_MAGIC); return rc; } /** * SSMR3GetStructEx helper that gets a HCPTR that is used as a NULL indicator. * * @returns VBox status code. * * @param pSSM The saved state handle. * @param ppv Where to return the value (0/1). * @param fFlags SSMSTRUCT_FLAGS_XXX. */ DECLINLINE(int) ssmR3GetHCPtrNI(PSSMHANDLE pSSM, void **ppv, uint32_t fFlags) { uintptr_t uPtrNI; if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) { if (ssmR3GetHostBits(pSSM) == 64) { uint64_t u; int rc = ssmR3DataRead(pSSM, &u, sizeof(u)); if (RT_FAILURE(rc)) return rc; uPtrNI = u ? 1 : 0; } else { uint32_t u; int rc = ssmR3DataRead(pSSM, &u, sizeof(u)); if (RT_FAILURE(rc)) return rc; uPtrNI = u ? 1 : 0; } } else { bool f; int rc = SSMR3GetBool(pSSM, &f); if (RT_FAILURE(rc)) return rc; uPtrNI = f ? 1 : 0; } *ppv = (void *)uPtrNI; return VINF_SUCCESS; } /** * Guts a structure, extended API. * * @returns VBox status code. * @param pSSM The saved state handle. * @param pvStruct The structure address. * @param cbStruct The size of the struct (use for validation only). * @param fFlags Combination of SSMSTRUCT_FLAGS_XXX defines. * @param paFields The array of structure fields descriptions. The * array must be terminated by a SSMFIELD_ENTRY_TERM(). * @param pvUser User argument for any callbacks that paFields might * contain. */ VMMR3DECL(int) SSMR3GetStructEx(PSSMHANDLE pSSM, void *pvStruct, size_t cbStruct, uint32_t fFlags, PCSSMFIELD paFields, void *pvUser) { int rc; uint32_t u32Magic; /* * Validation. */ SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); AssertMsgReturn(!(fFlags & ~SSMSTRUCT_FLAGS_VALID_MASK), ("%#x\n", fFlags), VERR_INVALID_PARAMETER); AssertPtr(pvStruct); AssertPtr(paFields); /* * Begin marker. */ if (!(fFlags & SSMSTRUCT_FLAGS_NO_MARKERS)) { rc = SSMR3GetU32(pSSM, &u32Magic); if (RT_FAILURE(rc)) return rc; AssertMsgReturn(u32Magic == SSMR3STRUCT_BEGIN, ("u32Magic=%#RX32\n", u32Magic), VERR_SSM_STRUCTURE_MAGIC); } /* * Put the fields */ uint32_t off = 0; for (PCSSMFIELD pCur = paFields; pCur->cb != UINT32_MAX && pCur->off != UINT32_MAX; pCur++) { uint32_t const offField = (!SSMFIELDTRANS_IS_PADDING(pCur->pfnGetPutOrTransformer) || pCur->off != UINT32_MAX / 2) && !SSMFIELDTRANS_IS_OLD(pCur->pfnGetPutOrTransformer) ? pCur->off : off; uint32_t const cbField = SSMFIELDTRANS_IS_OLD(pCur->pfnGetPutOrTransformer) ? 0 : SSMFIELDTRANS_IS_PADDING(pCur->pfnGetPutOrTransformer) ? RT_HIWORD(pCur->cb) : pCur->cb; AssertMsgReturn( cbField <= cbStruct && offField + cbField <= cbStruct && offField + cbField >= offField, ("off=%#x cb=%#x cbStruct=%#x (%s)\n", cbField, offField, cbStruct, pCur->pszName), VERR_SSM_FIELD_OUT_OF_BOUNDS); AssertMsgReturn( !(fFlags & SSMSTRUCT_FLAGS_FULL_STRUCT) || off == offField, ("off=%#x offField=%#x (%s)\n", off, offField, pCur->pszName), VERR_SSM_FIELD_NOT_CONSECUTIVE); rc = VINF_SUCCESS; uint8_t *pbField = (uint8_t *)pvStruct + offField; switch ((uintptr_t)pCur->pfnGetPutOrTransformer) { case SSMFIELDTRANS_NO_TRANSFORMATION: rc = ssmR3DataRead(pSSM, pbField, cbField); break; case SSMFIELDTRANS_GCPHYS: AssertMsgReturn(cbField == sizeof(RTGCPHYS), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3GetGCPhys(pSSM, (PRTGCPHYS)pbField); break; case SSMFIELDTRANS_GCPTR: AssertMsgReturn(cbField == sizeof(RTGCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3GetGCPtr(pSSM, (PRTGCPTR)pbField); break; case SSMFIELDTRANS_RCPTR: AssertMsgReturn(cbField == sizeof(RTRCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3GetRCPtr(pSSM, (PRTRCPTR)pbField); break; case SSMFIELDTRANS_RCPTR_ARRAY: { uint32_t const cEntries = cbField / sizeof(RTRCPTR); AssertMsgReturn(cbField == cEntries * sizeof(RTRCPTR) && cEntries, ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = VINF_SUCCESS; for (uint32_t i = 0; i < cEntries && RT_SUCCESS(rc); i++) rc = SSMR3GetRCPtr(pSSM, &((PRTRCPTR)pbField)[i]); break; } case SSMFIELDTRANS_HCPTR_NI: AssertMsgReturn(cbField == sizeof(void *), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = ssmR3GetHCPtrNI(pSSM, (void **)pbField, fFlags); break; case SSMFIELDTRANS_HCPTR_NI_ARRAY: { uint32_t const cEntries = cbField / sizeof(void *); AssertMsgReturn(cbField == cEntries * sizeof(void *) && cEntries, ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = VINF_SUCCESS; for (uint32_t i = 0; i < cEntries && RT_SUCCESS(rc); i++) rc = ssmR3GetHCPtrNI(pSSM, &((void **)pbField)[i], fFlags); break; } case SSMFIELDTRANS_HCPTR_HACK_U32: AssertMsgReturn(cbField == sizeof(void *), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); *(uintptr_t *)pbField = 0; rc = ssmR3DataRead(pSSM, pbField, sizeof(uint32_t)); if ((fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) && ssmR3GetHostBits(pSSM) == 64) { uint32_t u32; rc = ssmR3DataRead(pSSM, &u32, sizeof(uint32_t)); AssertMsgReturn(RT_FAILURE(rc) || u32 == 0 || (fFlags & SSMSTRUCT_FLAGS_SAVED_AS_MEM), ("high=%#x low=%#x (%s)\n", u32, *(uint32_t *)pbField, pCur->pszName), VERR_SSM_FIELD_INVALID_VALUE); } break; case SSMFIELDTRANS_U32_ZX_U64: AssertMsgReturn(cbField == sizeof(uint64_t), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); ((uint32_t *)pbField)[1] = 0; rc = SSMR3GetU32(pSSM, (uint32_t *)pbField); break; case SSMFIELDTRANS_IGNORE: if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = SSMR3Skip(pSSM, cbField); break; case SSMFIELDTRANS_IGN_GCPHYS: AssertMsgReturn(cbField == sizeof(RTGCPHYS), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = SSMR3Skip(pSSM, pSSM->u.Read.cbGCPhys); break; case SSMFIELDTRANS_IGN_GCPTR: AssertMsgReturn(cbField == sizeof(RTGCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = SSMR3Skip(pSSM, pSSM->u.Read.cbGCPtr); break; case SSMFIELDTRANS_IGN_RCPTR: AssertMsgReturn(cbField == sizeof(RTRCPTR), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = SSMR3Skip(pSSM, sizeof(RTRCPTR)); break; case SSMFIELDTRANS_IGN_HCPTR: AssertMsgReturn(cbField == sizeof(void *), ("%#x (%s)\n", cbField, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = SSMR3Skip(pSSM, ssmR3GetHostBits(pSSM) / 8); break; case SSMFIELDTRANS_OLD: AssertMsgReturn(pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3Skip(pSSM, pCur->cb); break; case SSMFIELDTRANS_OLD_GCPHYS: AssertMsgReturn(pCur->cb == sizeof(RTGCPHYS) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3Skip(pSSM, pSSM->u.Read.cbGCPhys); break; case SSMFIELDTRANS_OLD_GCPTR: AssertMsgReturn(pCur->cb == sizeof(RTGCPTR) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3Skip(pSSM, pSSM->u.Read.cbGCPtr); break; case SSMFIELDTRANS_OLD_RCPTR: AssertMsgReturn(pCur->cb == sizeof(RTRCPTR) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3Skip(pSSM, sizeof(RTRCPTR)); break; case SSMFIELDTRANS_OLD_HCPTR: AssertMsgReturn(pCur->cb == sizeof(void *) && pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3Skip(pSSM, ssmR3GetHostBits(pSSM) / 8); break; case SSMFIELDTRANS_OLD_PAD_HC: AssertMsgReturn(pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); rc = SSMR3Skip(pSSM, ssmR3GetHostBits(pSSM) == 64 ? RT_HIWORD(pCur->cb) : RT_LOWORD(pCur->cb)); break; case SSMFIELDTRANS_OLD_PAD_MSC32: AssertMsgReturn(pCur->off == UINT32_MAX / 2, ("%#x %#x (%s)\n", pCur->cb, pCur->off, pCur->pszName), VERR_SSM_FIELD_INVALID_SIZE); if (ssmR3IsHostMsc32(pSSM)) rc = SSMR3Skip(pSSM, pCur->cb); break; case SSMFIELDTRANS_PAD_HC: case SSMFIELDTRANS_PAD_HC32: case SSMFIELDTRANS_PAD_HC64: case SSMFIELDTRANS_PAD_HC_AUTO: case SSMFIELDTRANS_PAD_MSC32_AUTO: { uint32_t cb32 = RT_BYTE1(pCur->cb); uint32_t cb64 = RT_BYTE2(pCur->cb); uint32_t cbCtx = HC_ARCH_BITS == 64 || ( (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_MSC32_AUTO && !SSM_HOST_IS_MSC_32) ? cb64 : cb32; uint32_t cbSaved = ssmR3GetHostBits(pSSM) == 64 || ( (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_MSC32_AUTO && !ssmR3IsHostMsc32(pSSM)) ? cb64 : cb32; AssertMsgReturn( cbField == cbCtx && ( ( pCur->off == UINT32_MAX / 2 && ( cbField == 0 || (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_HC_AUTO || (uintptr_t)pCur->pfnGetPutOrTransformer == SSMFIELDTRANS_PAD_MSC32_AUTO ) ) || (pCur->off != UINT32_MAX / 2 && cbField != 0) ) , ("cbField=%#x cb32=%#x cb64=%#x HC_ARCH_BITS=%u cbCtx=%#x cbSaved=%#x off=%#x\n", cbField, cb32, cb64, HC_ARCH_BITS, cbCtx, cbSaved, pCur->off), VERR_SSM_FIELD_INVALID_PADDING_SIZE); if (fFlags & SSMSTRUCT_FLAGS_DONT_IGNORE) rc = SSMR3Skip(pSSM, cbSaved); break; } default: AssertPtrReturn(pCur->pfnGetPutOrTransformer, VERR_SSM_FIELD_INVALID_CALLBACK); rc = pCur->pfnGetPutOrTransformer(pSSM, pCur, pvStruct, fFlags, true /*fGetOrPut*/, pvUser); break; } if (RT_FAILURE(rc)) return rc; off = offField + cbField; } AssertMsgReturn( !(fFlags & SSMSTRUCT_FLAGS_FULL_STRUCT) || off == cbStruct, ("off=%#x cbStruct=%#x\n", off, cbStruct), VERR_SSM_FIELD_NOT_CONSECUTIVE); /* * End marker */ if (!(fFlags & SSMSTRUCT_FLAGS_NO_MARKERS)) { rc = SSMR3GetU32(pSSM, &u32Magic); if (RT_FAILURE(rc)) return rc; AssertMsgReturn(u32Magic == SSMR3STRUCT_END, ("u32Magic=%#RX32\n", u32Magic), VERR_SSM_STRUCTURE_MAGIC); } return VINF_SUCCESS; } /** * Loads a boolean item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pfBool Where to store the item. */ VMMR3DECL(int) SSMR3GetBool(PSSMHANDLE pSSM, bool *pfBool) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); uint8_t u8; /* see SSMR3PutBool */ int rc = ssmR3DataRead(pSSM, &u8, sizeof(u8)); if (RT_SUCCESS(rc)) { Assert(u8 <= 1); *pfBool = !!u8; } return rc; } /** * Loads a 8-bit unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu8 Where to store the item. */ VMMR3DECL(int) SSMR3GetU8(PSSMHANDLE pSSM, uint8_t *pu8) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pu8, sizeof(*pu8)); } /** * Loads a 8-bit signed integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pi8 Where to store the item. */ VMMR3DECL(int) SSMR3GetS8(PSSMHANDLE pSSM, int8_t *pi8) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pi8, sizeof(*pi8)); } /** * Loads a 16-bit unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu16 Where to store the item. */ VMMR3DECL(int) SSMR3GetU16(PSSMHANDLE pSSM, uint16_t *pu16) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pu16, sizeof(*pu16)); } /** * Loads a 16-bit signed integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pi16 Where to store the item. */ VMMR3DECL(int) SSMR3GetS16(PSSMHANDLE pSSM, int16_t *pi16) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pi16, sizeof(*pi16)); } /** * Loads a 32-bit unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu32 Where to store the item. */ VMMR3DECL(int) SSMR3GetU32(PSSMHANDLE pSSM, uint32_t *pu32) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pu32, sizeof(*pu32)); } /** * Loads a 32-bit signed integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pi32 Where to store the item. */ VMMR3DECL(int) SSMR3GetS32(PSSMHANDLE pSSM, int32_t *pi32) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pi32, sizeof(*pi32)); } /** * Loads a 64-bit unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu64 Where to store the item. */ VMMR3DECL(int) SSMR3GetU64(PSSMHANDLE pSSM, uint64_t *pu64) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pu64, sizeof(*pu64)); } /** * Loads a 64-bit signed integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pi64 Where to store the item. */ VMMR3DECL(int) SSMR3GetS64(PSSMHANDLE pSSM, int64_t *pi64) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pi64, sizeof(*pi64)); } /** * Loads a 128-bit unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu128 Where to store the item. */ VMMR3DECL(int) SSMR3GetU128(PSSMHANDLE pSSM, uint128_t *pu128) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pu128, sizeof(*pu128)); } /** * Loads a 128-bit signed integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pi128 Where to store the item. */ VMMR3DECL(int) SSMR3GetS128(PSSMHANDLE pSSM, int128_t *pi128) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pi128, sizeof(*pi128)); } /** * Loads a VBox unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu Where to store the integer. */ VMMR3DECL(int) SSMR3GetUInt(PSSMHANDLE pSSM, PRTUINT pu) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pu, sizeof(*pu)); } /** * Loads a VBox signed integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pi Where to store the integer. */ VMMR3DECL(int) SSMR3GetSInt(PSSMHANDLE pSSM, PRTINT pi) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pi, sizeof(*pi)); } /** * Loads a GC natural unsigned integer item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu Where to store the integer. * * @deprecated Silly type with an incorrect size, don't use it. */ VMMR3DECL(int) SSMR3GetGCUInt(PSSMHANDLE pSSM, PRTGCUINT pu) { AssertCompile(sizeof(RTGCPTR) == sizeof(*pu)); return SSMR3GetGCPtr(pSSM, (PRTGCPTR)pu); } /** * Loads a GC unsigned integer register item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pu Where to store the integer. */ VMMR3DECL(int) SSMR3GetGCUIntReg(PSSMHANDLE pSSM, PRTGCUINTREG pu) { AssertCompile(sizeof(RTGCPTR) == sizeof(*pu)); return SSMR3GetGCPtr(pSSM, (PRTGCPTR)pu); } /** * Loads a 32 bits GC physical address item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pGCPhys Where to store the GC physical address. */ VMMR3DECL(int) SSMR3GetGCPhys32(PSSMHANDLE pSSM, PRTGCPHYS32 pGCPhys) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pGCPhys, sizeof(*pGCPhys)); } /** * Loads a 64 bits GC physical address item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pGCPhys Where to store the GC physical address. */ VMMR3DECL(int) SSMR3GetGCPhys64(PSSMHANDLE pSSM, PRTGCPHYS64 pGCPhys) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pGCPhys, sizeof(*pGCPhys)); } /** * Loads a GC physical address item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pGCPhys Where to store the GC physical address. */ VMMR3DECL(int) SSMR3GetGCPhys(PSSMHANDLE pSSM, PRTGCPHYS pGCPhys) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); /* * Default size? */ if (RT_LIKELY(sizeof(*pGCPhys) == pSSM->u.Read.cbGCPhys)) return ssmR3DataRead(pSSM, pGCPhys, sizeof(*pGCPhys)); /* * Fiddly. */ Assert(sizeof(*pGCPhys) == sizeof(uint64_t) || sizeof(*pGCPhys) == sizeof(uint32_t)); Assert(pSSM->u.Read.cbGCPhys == sizeof(uint64_t) || pSSM->u.Read.cbGCPhys == sizeof(uint32_t)); if (pSSM->u.Read.cbGCPhys == sizeof(uint64_t)) { /* 64-bit saved, 32-bit load: try truncate it. */ uint64_t u64; int rc = ssmR3DataRead(pSSM, &u64, sizeof(uint64_t)); if (RT_FAILURE(rc)) return rc; if (u64 >= _4G) return VERR_SSM_GCPHYS_OVERFLOW; *pGCPhys = (RTGCPHYS)u64; return rc; } /* 32-bit saved, 64-bit load: clear the high part. */ *pGCPhys = 0; return ssmR3DataRead(pSSM, pGCPhys, sizeof(uint32_t)); } /** * Loads a GC virtual address item from the current data unit. * * Only applies to in the 1.1 format: * - SSMR3GetGCPtr * - SSMR3GetGCUIntPtr * - SSMR3GetGCUInt * - SSMR3GetGCUIntReg * * Put functions are not affected. * * @returns VBox status. * @param pSSM The saved state handle. * @param cbGCPtr Size of RTGCPTR * * @remarks This interface only works with saved state version 1.1, if the * format isn't 1.1 the call will be ignored. */ VMMR3_INT_DECL(int) SSMR3HandleSetGCPtrSize(PSSMHANDLE pSSM, unsigned cbGCPtr) { Assert(cbGCPtr == sizeof(RTGCPTR32) || cbGCPtr == sizeof(RTGCPTR64)); if (!pSSM->u.Read.fFixedGCPtrSize) { Log(("SSMR3SetGCPtrSize: %u -> %u bytes\n", pSSM->u.Read.cbGCPtr, cbGCPtr)); pSSM->u.Read.cbGCPtr = cbGCPtr; pSSM->u.Read.fFixedGCPtrSize = true; } else if ( pSSM->u.Read.cbGCPtr != cbGCPtr && pSSM->u.Read.uFmtVerMajor == 1 && pSSM->u.Read.uFmtVerMinor == 1) AssertMsgFailed(("SSMR3SetGCPtrSize: already fixed at %u bytes; requested %u bytes\n", pSSM->u.Read.cbGCPtr, cbGCPtr)); return VINF_SUCCESS; } /** * Loads a GC virtual address item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pGCPtr Where to store the GC virtual address. */ VMMR3DECL(int) SSMR3GetGCPtr(PSSMHANDLE pSSM, PRTGCPTR pGCPtr) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); /* * Default size? */ if (RT_LIKELY(sizeof(*pGCPtr) == pSSM->u.Read.cbGCPtr)) return ssmR3DataRead(pSSM, pGCPtr, sizeof(*pGCPtr)); /* * Fiddly. */ Assert(sizeof(*pGCPtr) == sizeof(uint64_t) || sizeof(*pGCPtr) == sizeof(uint32_t)); Assert(pSSM->u.Read.cbGCPtr == sizeof(uint64_t) || pSSM->u.Read.cbGCPtr == sizeof(uint32_t)); if (pSSM->u.Read.cbGCPtr == sizeof(uint64_t)) { /* 64-bit saved, 32-bit load: try truncate it. */ uint64_t u64; int rc = ssmR3DataRead(pSSM, &u64, sizeof(uint64_t)); if (RT_FAILURE(rc)) return rc; if (u64 >= _4G) return VERR_SSM_GCPTR_OVERFLOW; *pGCPtr = (RTGCPTR)u64; return rc; } /* 32-bit saved, 64-bit load: clear the high part. */ *pGCPtr = 0; return ssmR3DataRead(pSSM, pGCPtr, sizeof(uint32_t)); } /** * Loads a GC virtual address (represented as unsigned integer) item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pGCPtr Where to store the GC virtual address. */ VMMR3DECL(int) SSMR3GetGCUIntPtr(PSSMHANDLE pSSM, PRTGCUINTPTR pGCPtr) { AssertCompile(sizeof(RTGCPTR) == sizeof(*pGCPtr)); return SSMR3GetGCPtr(pSSM, (PRTGCPTR)pGCPtr); } /** * Loads an RC virtual address item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pRCPtr Where to store the RC virtual address. */ VMMR3DECL(int) SSMR3GetRCPtr(PSSMHANDLE pSSM, PRTRCPTR pRCPtr) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pRCPtr, sizeof(*pRCPtr)); } /** * Loads a I/O port address item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pIOPort Where to store the I/O port address. */ VMMR3DECL(int) SSMR3GetIOPort(PSSMHANDLE pSSM, PRTIOPORT pIOPort) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pIOPort, sizeof(*pIOPort)); } /** * Loads a selector item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pSel Where to store the selector. */ VMMR3DECL(int) SSMR3GetSel(PSSMHANDLE pSSM, PRTSEL pSel) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pSel, sizeof(*pSel)); } /** * Loads a memory item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param pv Where to store the item. * @param cb Size of the item. */ VMMR3DECL(int) SSMR3GetMem(PSSMHANDLE pSSM, void *pv, size_t cb) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); return ssmR3DataRead(pSSM, pv, cb); } /** * Loads a string item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param psz Where to store the item. * @param cbMax Max size of the item (including '\\0'). */ VMMR3DECL(int) SSMR3GetStrZ(PSSMHANDLE pSSM, char *psz, size_t cbMax) { return SSMR3GetStrZEx(pSSM, psz, cbMax, NULL); } /** * Loads a string item from the current data unit. * * @returns VBox status. * @param pSSM The saved state handle. * @param psz Where to store the item. * @param cbMax Max size of the item (including '\\0'). * @param pcbStr The length of the loaded string excluding the '\\0'. (optional) */ VMMR3DECL(int) SSMR3GetStrZEx(PSSMHANDLE pSSM, char *psz, size_t cbMax, size_t *pcbStr) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); /* read size prefix. */ uint32_t u32; int rc = SSMR3GetU32(pSSM, &u32); if (RT_SUCCESS(rc)) { if (pcbStr) *pcbStr = u32; if (u32 < cbMax) { /* terminate and read string content. */ psz[u32] = '\0'; return ssmR3DataRead(pSSM, psz, u32); } return VERR_TOO_MUCH_DATA; } return rc; } /** * Skips a number of bytes in the current data unit. * * @returns VBox status code. * @param pSSM The SSM handle. * @param cb The number of bytes to skip. */ VMMR3DECL(int) SSMR3Skip(PSSMHANDLE pSSM, size_t cb) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); while (cb > 0) { uint8_t abBuf[8192]; size_t cbCur = RT_MIN(sizeof(abBuf), cb); cb -= cbCur; int rc = ssmR3DataRead(pSSM, abBuf, cbCur); if (RT_FAILURE(rc)) return rc; } return VINF_SUCCESS; } /** * Skips to the end of the current data unit. * * Since version 2 of the format, the load exec callback have to explicitly call * this API if it wish to be lazy for some reason. This is because there seldom * is a good reason to not read your entire data unit and it was hiding bugs. * * @returns VBox status code. * @param pSSM The saved state handle. */ VMMR3DECL(int) SSMR3SkipToEndOfUnit(PSSMHANDLE pSSM) { SSM_ASSERT_READABLE_RET(pSSM); SSM_CHECK_CANCELLED_RET(pSSM); if (pSSM->u.Read.uFmtVerMajor >= 2) { /* * Read until we the end of data condition is raised. */ pSSM->u.Read.cbDataBuffer = 0; pSSM->u.Read.offDataBuffer = 0; if (!pSSM->u.Read.fEndOfData) { do { /* read the rest of the current record */ while (pSSM->u.Read.cbRecLeft) { uint8_t abBuf[8192]; uint32_t cbToRead = RT_MIN(pSSM->u.Read.cbRecLeft, sizeof(abBuf)); int rc = ssmR3DataReadV2Raw(pSSM, abBuf, cbToRead); if (RT_FAILURE(rc)) return pSSM->rc = rc; pSSM->u.Read.cbRecLeft -= cbToRead; } /* read the next header. */ int rc = ssmR3DataReadRecHdrV2(pSSM); if (RT_FAILURE(rc)) return pSSM->rc = rc; } while (!pSSM->u.Read.fEndOfData); } } /* else: Doesn't matter for the version 1 loading. */ return VINF_SUCCESS; } /** * Calculate the checksum of a file portion. * * @returns VBox status. * @param pStrm The stream handle * @param off Where to start checksumming. * @param cb How much to checksum. * @param pu32CRC Where to store the calculated checksum. */ static int ssmR3CalcChecksum(PSSMSTRM pStrm, uint64_t off, uint64_t cb, uint32_t *pu32CRC) { /* * Allocate a buffer. */ const size_t cbBuf = _32K; void *pvBuf = RTMemTmpAlloc(cbBuf); if (!pvBuf) return VERR_NO_TMP_MEMORY; /* * Loop reading and calculating CRC32. */ int rc = VINF_SUCCESS; uint32_t u32CRC = RTCrc32Start(); while (cb > 0) { /* read chunk */ size_t cbToRead = cbBuf; if (cb < cbBuf) cbToRead = cb; rc = ssmR3StrmPeekAt(pStrm, off, pvBuf, cbToRead, NULL); if (RT_FAILURE(rc)) { AssertMsgFailed(("Failed with rc=%Rrc while calculating crc.\n", rc)); RTMemTmpFree(pvBuf); return rc; } /* advance */ cb -= cbToRead; off += cbToRead; /* calc crc32. */ u32CRC = RTCrc32Process(u32CRC, pvBuf, cbToRead); } RTMemTmpFree(pvBuf); /* store the calculated crc */ u32CRC = RTCrc32Finish(u32CRC); Log(("SSM: u32CRC=0x%08x\n", u32CRC)); *pu32CRC = u32CRC; return VINF_SUCCESS; } /** * Validates a version 2 footer. * * @returns VBox status code. * * @param pFooter The footer. * @param offFooter The stream offset of the footer. * @param cDirEntries The number of directory entries. UINT32_MAX if * unknown. * @param fStreamCrc32 Whether the stream is checksummed using CRC-32. * @param u32StreamCRC The stream checksum. */ static int ssmR3ValidateFooter(PSSMFILEFTR pFooter, uint64_t offFooter, uint32_t cDirEntries, bool fStreamCrc32, uint32_t u32StreamCRC) { if (memcmp(pFooter->szMagic, SSMFILEFTR_MAGIC, sizeof(pFooter->szMagic))) { LogRel(("SSM: Bad footer magic: %.*Rhxs\n", sizeof(pFooter->szMagic), &pFooter->szMagic[0])); return VERR_SSM_INTEGRITY_FOOTER; } SSM_CHECK_CRC32_RET(pFooter, sizeof(*pFooter), ("Footer CRC mismatch: %08x, correct is %08x\n", u32CRC, u32ActualCRC)); if (pFooter->offStream != offFooter) { LogRel(("SSM: SSMFILEFTR::offStream is wrong: %llx, expected %llx\n", pFooter->offStream, offFooter)); return VERR_SSM_INTEGRITY_FOOTER; } if (pFooter->u32Reserved) { LogRel(("SSM: Reserved footer field isn't zero: %08x\n", pFooter->u32Reserved)); return VERR_SSM_INTEGRITY_FOOTER; } if (cDirEntries != UINT32_MAX) AssertLogRelMsgReturn(pFooter->cDirEntries == cDirEntries, ("Footer: cDirEntries=%#x, expected %#x\n", pFooter->cDirEntries, cDirEntries), VERR_SSM_INTEGRITY_FOOTER); else AssertLogRelMsgReturn(pFooter->cDirEntries < _64K, ("Footer: cDirEntries=%#x\n", pFooter->cDirEntries), VERR_SSM_INTEGRITY_FOOTER); if ( !fStreamCrc32 && pFooter->u32StreamCRC) { LogRel(("SSM: u32StreamCRC field isn't zero, but header says stream checksumming is disabled.\n")); return VERR_SSM_INTEGRITY_FOOTER; } if ( fStreamCrc32 && pFooter->u32StreamCRC != u32StreamCRC) { LogRel(("SSM: Bad stream CRC: %#x, expected %#x.\n", pFooter->u32StreamCRC, u32StreamCRC)); return VERR_SSM_INTEGRITY_CRC; } return VINF_SUCCESS; } /** * Validates the header information stored in the handle. * * @returns VBox status code. * * @param pSSM The handle. * @param fHaveHostBits Set if the host bits field is valid. * @param fHaveVersion Set if we have a version. */ static int ssmR3ValidateHeaderInfo(PSSMHANDLE pSSM, bool fHaveHostBits, bool fHaveVersion) { Assert(pSSM->u.Read.cbFileHdr < 256 && pSSM->u.Read.cbFileHdr > 32); Assert(pSSM->u.Read.uFmtVerMajor == 1 || pSSM->u.Read.uFmtVerMajor == 2); Assert(pSSM->u.Read.uFmtVerMinor <= 2); if (fHaveVersion) { if ( pSSM->u.Read.u16VerMajor == 0 || pSSM->u.Read.u16VerMajor > 1000 || pSSM->u.Read.u16VerMinor > 1000 || pSSM->u.Read.u32VerBuild > _1M || pSSM->u.Read.u32SvnRev == 0 || pSSM->u.Read.u32SvnRev > 10000000 /*100M*/) { LogRel(("SSM: Incorrect version values: %u.%u.%u.r%u\n", pSSM->u.Read.u16VerMajor, pSSM->u.Read.u16VerMinor, pSSM->u.Read.u32VerBuild, pSSM->u.Read.u32SvnRev)); return VERR_SSM_INTEGRITY_VBOX_VERSION; } } else AssertLogRelReturn( pSSM->u.Read.u16VerMajor == 0 && pSSM->u.Read.u16VerMinor == 0 && pSSM->u.Read.u32VerBuild == 0 && pSSM->u.Read.u32SvnRev == 0, VERR_SSM_INTEGRITY_VBOX_VERSION); if (fHaveHostBits) { if ( pSSM->u.Read.cHostBits != 32 && pSSM->u.Read.cHostBits != 64) { LogRel(("SSM: Incorrect cHostBits value: %u\n", pSSM->u.Read.cHostBits)); return VERR_SSM_INTEGRITY_HEADER; } } else AssertLogRelReturn(pSSM->u.Read.cHostBits == 0, VERR_SSM_INTEGRITY_HEADER); if ( pSSM->u.Read.cbGCPhys != sizeof(uint32_t) && pSSM->u.Read.cbGCPhys != sizeof(uint64_t)) { LogRel(("SSM: Incorrect cbGCPhys value: %d\n", pSSM->u.Read.cbGCPhys)); return VERR_SSM_INTEGRITY_HEADER; } if ( pSSM->u.Read.cbGCPtr != sizeof(uint32_t) && pSSM->u.Read.cbGCPtr != sizeof(uint64_t)) { LogRel(("SSM: Incorrect cbGCPtr value: %d\n", pSSM->u.Read.cbGCPtr)); return VERR_SSM_INTEGRITY_HEADER; } return VINF_SUCCESS; } /** * Reads the header, detects the format version and performs integrity * validations. * * @returns VBox status. * @param pSSM The saved state handle. A number of field will * be updated, mostly header related information. * fLiveSave is also set if appropriate. * @param fChecksumIt Whether to checksum the file or not. This will * be ignored if it the stream isn't a file. * @param fChecksumOnRead Whether to validate the checksum while reading * the stream instead of up front. If not possible, * verify the checksum up front. * @param pHdr Where to store the file header. */ static int ssmR3HeaderAndValidate(PSSMHANDLE pSSM, bool fChecksumIt, bool fChecksumOnRead) { /* * Read and check the header magic. */ union { SSMFILEHDR v2_0; SSMFILEHDRV12 v1_2; SSMFILEHDRV11 v1_1; } uHdr; int rc = ssmR3StrmRead(&pSSM->Strm, &uHdr, sizeof(uHdr.v2_0.szMagic)); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed to read file magic header. rc=%Rrc\n", rc)); return rc; } if (memcmp(uHdr.v2_0.szMagic, SSMFILEHDR_MAGIC_BASE, sizeof(SSMFILEHDR_MAGIC_BASE) - 1)) { Log(("SSM: Not a saved state file. magic=%.*s\n", sizeof(uHdr.v2_0.szMagic) - 1, uHdr.v2_0.szMagic)); return VERR_SSM_INTEGRITY_MAGIC; } /* * Find the header size and read the rest. */ static const struct { char szMagic[sizeof(SSMFILEHDR_MAGIC_V2_0)]; uint32_t cbHdr; unsigned uFmtVerMajor; unsigned uFmtVerMinor; } s_aVers[] = { { SSMFILEHDR_MAGIC_V2_0, sizeof(SSMFILEHDR), 2, 0 }, { SSMFILEHDR_MAGIC_V1_2, sizeof(SSMFILEHDRV12), 1, 2 }, { SSMFILEHDR_MAGIC_V1_1, sizeof(SSMFILEHDRV11), 1, 1 }, }; int iVer = RT_ELEMENTS(s_aVers); while (iVer-- > 0) if (!memcmp(uHdr.v2_0.szMagic, s_aVers[iVer].szMagic, sizeof(uHdr.v2_0.szMagic))) break; if (iVer < 0) { Log(("SSM: Unknown file format version. magic=%.*s\n", sizeof(uHdr.v2_0.szMagic) - 1, uHdr.v2_0.szMagic)); return VERR_SSM_INTEGRITY_VERSION; } pSSM->u.Read.uFmtVerMajor = s_aVers[iVer].uFmtVerMajor; pSSM->u.Read.uFmtVerMinor = s_aVers[iVer].uFmtVerMinor; pSSM->u.Read.cbFileHdr = s_aVers[iVer].cbHdr; rc = ssmR3StrmRead(&pSSM->Strm, (uint8_t *)&uHdr + sizeof(uHdr.v2_0.szMagic), pSSM->u.Read.cbFileHdr - sizeof(uHdr.v2_0.szMagic)); if (RT_FAILURE(rc)) { LogRel(("SSM: Failed to read the file header. rc=%Rrc\n", rc)); return rc; } /* * Make version specific adjustments. */ if (pSSM->u.Read.uFmtVerMajor >= 2) { /* * Version 2.0 and later. */ if (pSSM->u.Read.uFmtVerMinor == 0) { /* validate the header. */ SSM_CHECK_CRC32_RET(&uHdr.v2_0, sizeof(uHdr.v2_0), ("Header CRC mismatch: %08x, correct is %08x\n", u32CRC, u32ActualCRC)); if (uHdr.v2_0.u8Reserved) { LogRel(("SSM: Reserved header field isn't zero: %02x\n", uHdr.v2_0.u8Reserved)); return VERR_SSM_INTEGRITY; } if (uHdr.v2_0.fFlags & ~(SSMFILEHDR_FLAGS_STREAM_CRC32 | SSMFILEHDR_FLAGS_STREAM_LIVE_SAVE)) { LogRel(("SSM: Unknown header flags: %08x\n", uHdr.v2_0.fFlags)); return VERR_SSM_INTEGRITY; } if ( uHdr.v2_0.cbMaxDecompr > sizeof(pSSM->u.Read.abDataBuffer) || uHdr.v2_0.cbMaxDecompr < _1K || (uHdr.v2_0.cbMaxDecompr & 0xff) != 0) { LogRel(("SSM: The cbMaxDecompr header field is out of range: %#x\n", uHdr.v2_0.cbMaxDecompr)); return VERR_SSM_INTEGRITY; } /* set the header info. */ pSSM->u.Read.cHostBits = uHdr.v2_0.cHostBits; pSSM->u.Read.u16VerMajor = uHdr.v2_0.u16VerMajor; pSSM->u.Read.u16VerMinor = uHdr.v2_0.u16VerMinor; pSSM->u.Read.u32VerBuild = uHdr.v2_0.u32VerBuild; pSSM->u.Read.u32SvnRev = uHdr.v2_0.u32SvnRev; pSSM->u.Read.cbGCPhys = uHdr.v2_0.cbGCPhys; pSSM->u.Read.cbGCPtr = uHdr.v2_0.cbGCPtr; pSSM->u.Read.fFixedGCPtrSize= true; pSSM->u.Read.fStreamCrc32 = !!(uHdr.v2_0.fFlags & SSMFILEHDR_FLAGS_STREAM_CRC32); pSSM->fLiveSave = !!(uHdr.v2_0.fFlags & SSMFILEHDR_FLAGS_STREAM_LIVE_SAVE); } else AssertFailedReturn(VERR_SSM_IPE_2); if (!pSSM->u.Read.fStreamCrc32) ssmR3StrmDisableChecksumming(&pSSM->Strm); /* * Read and validate the footer if it's a file. */ if (ssmR3StrmIsFile(&pSSM->Strm)) { SSMFILEFTR Footer; uint64_t offFooter; rc = ssmR3StrmPeekAt(&pSSM->Strm, -(RTFOFF)sizeof(SSMFILEFTR), &Footer, sizeof(Footer), &offFooter); AssertLogRelRCReturn(rc, rc); rc = ssmR3ValidateFooter(&Footer, offFooter, UINT32_MAX, pSSM->u.Read.fStreamCrc32, Footer.u32StreamCRC); if (RT_FAILURE(rc)) return rc; pSSM->u.Read.cbLoadFile = offFooter + sizeof(Footer); pSSM->u.Read.u32LoadCRC = Footer.u32StreamCRC; } else { pSSM->u.Read.cbLoadFile = UINT64_MAX; pSSM->u.Read.u32LoadCRC = 0; } /* * Validate the header info we've set in the handle. */ rc = ssmR3ValidateHeaderInfo(pSSM, true /*fHaveHostBits*/, true /*fHaveVersion*/); if (RT_FAILURE(rc)) return rc; /* * Check the checksum if that's called for and possible. */ if ( pSSM->u.Read.fStreamCrc32 && fChecksumIt && !fChecksumOnRead && ssmR3StrmIsFile(&pSSM->Strm)) { uint32_t u32CRC; rc = ssmR3CalcChecksum(&pSSM->Strm, 0, pSSM->u.Read.cbLoadFile - sizeof(SSMFILEFTR), &u32CRC); if (RT_FAILURE(rc)) return rc; if (u32CRC != pSSM->u.Read.u32LoadCRC) { LogRel(("SSM: Invalid CRC! Calculated %#010x, in footer %#010x\n", u32CRC, pSSM->u.Read.u32LoadCRC)); return VERR_SSM_INTEGRITY_CRC; } } } else { /* * Version 1.x of the format. */ bool fHaveHostBits = true; bool fHaveVersion = false; RTUUID MachineUuidFromHdr; ssmR3StrmDisableChecksumming(&pSSM->Strm); if (pSSM->u.Read.uFmtVerMinor == 1) { pSSM->u.Read.cHostBits = 0; /* unknown */ pSSM->u.Read.u16VerMajor = 0; pSSM->u.Read.u16VerMinor = 0; pSSM->u.Read.u32VerBuild = 0; pSSM->u.Read.u32SvnRev = 0; pSSM->u.Read.cbLoadFile = uHdr.v1_1.cbFile; pSSM->u.Read.u32LoadCRC = uHdr.v1_1.u32CRC; pSSM->u.Read.cbGCPhys = sizeof(RTGCPHYS); pSSM->u.Read.cbGCPtr = sizeof(RTGCPTR); pSSM->u.Read.fFixedGCPtrSize = false; /* settable */ pSSM->u.Read.fStreamCrc32 = false; MachineUuidFromHdr = uHdr.v1_1.MachineUuid; fHaveHostBits = false; } else if (pSSM->u.Read.uFmtVerMinor == 2) { pSSM->u.Read.cHostBits = uHdr.v1_2.cHostBits; pSSM->u.Read.u16VerMajor = uHdr.v1_2.u16VerMajor; pSSM->u.Read.u16VerMinor = uHdr.v1_2.u16VerMinor; pSSM->u.Read.u32VerBuild = uHdr.v1_2.u32VerBuild; pSSM->u.Read.u32SvnRev = uHdr.v1_2.u32SvnRev; pSSM->u.Read.cbLoadFile = uHdr.v1_2.cbFile; pSSM->u.Read.u32LoadCRC = uHdr.v1_2.u32CRC; pSSM->u.Read.cbGCPhys = uHdr.v1_2.cbGCPhys; pSSM->u.Read.cbGCPtr = uHdr.v1_2.cbGCPtr; pSSM->u.Read.fFixedGCPtrSize = true; pSSM->u.Read.fStreamCrc32 = false; MachineUuidFromHdr = uHdr.v1_2.MachineUuid; fHaveVersion = true; } else AssertFailedReturn(VERR_SSM_IPE_1); /* * The MachineUuid must be NULL (was never used). */ if (!RTUuidIsNull(&MachineUuidFromHdr)) { LogRel(("SSM: The UUID of the saved state doesn't match the running VM.\n")); return VERR_SMM_INTEGRITY_MACHINE; } /* * Verify the file size. */ uint64_t cbFile = ssmR3StrmGetSize(&pSSM->Strm); if (cbFile != pSSM->u.Read.cbLoadFile) { LogRel(("SSM: File size mismatch. hdr.cbFile=%lld actual %lld\n", pSSM->u.Read.cbLoadFile, cbFile)); return VERR_SSM_INTEGRITY_SIZE; } /* * Validate the header info we've set in the handle. */ rc = ssmR3ValidateHeaderInfo(pSSM, fHaveHostBits, fHaveVersion); if (RT_FAILURE(rc)) return rc; /* * Verify the checksum if requested. * * Note! The checksum is not actually generated for the whole file, * this is of course a bug in the v1.x code that we cannot do * anything about. */ if ( fChecksumIt || fChecksumOnRead) { uint32_t u32CRC; rc = ssmR3CalcChecksum(&pSSM->Strm, RT_OFFSETOF(SSMFILEHDRV11, u32CRC) + sizeof(uHdr.v1_1.u32CRC), cbFile - pSSM->u.Read.cbFileHdr, &u32CRC); if (RT_FAILURE(rc)) return rc; if (u32CRC != pSSM->u.Read.u32LoadCRC) { LogRel(("SSM: Invalid CRC! Calculated %#010x, in header %#010x\n", u32CRC, pSSM->u.Read.u32LoadCRC)); return VERR_SSM_INTEGRITY_CRC; } } } return VINF_SUCCESS; } /** * Open a saved state for reading. * * The file will be positioned at the first data unit upon successful return. * * @returns VBox status code. * * @param pVM Pointer to the VM. * @param pszFilename The filename. NULL if pStreamOps is used. * @param pStreamOps The stream method table. NULL if pszFilename is * used. * @param pvUser The user argument to the stream methods. * @param fChecksumIt Check the checksum for the entire file. * @param fChecksumOnRead Whether to validate the checksum while reading * the stream instead of up front. If not possible, * verify the checksum up front. * @param pSSM Pointer to the handle structure. This will be * completely initialized on success. * @param cBuffers The number of stream buffers. */ static int ssmR3OpenFile(PVM pVM, const char *pszFilename, PCSSMSTRMOPS pStreamOps, void *pvUser, bool fChecksumIt, bool fChecksumOnRead, uint32_t cBuffers, PSSMHANDLE pSSM) { /* * Initialize the handle. */ pSSM->pVM = pVM; pSSM->enmOp = SSMSTATE_INVALID; pSSM->enmAfter = SSMAFTER_INVALID; pSSM->fCancelled = SSMHANDLE_OK; pSSM->rc = VINF_SUCCESS; pSSM->cbUnitLeftV1 = 0; pSSM->offUnit = UINT64_MAX; pSSM->offUnitUser = UINT64_MAX; pSSM->fLiveSave = false; pSSM->pfnProgress = NULL; pSSM->pvUser = NULL; pSSM->uPercent = 0; pSSM->offEstProgress = 0; pSSM->cbEstTotal = 0; pSSM->offEst = 0; pSSM->offEstUnitEnd = 0; pSSM->uPercentLive = 0; pSSM->uPercentPrepare = 5; pSSM->uPercentDone = 2; pSSM->uReportedLivePercent = 0; pSSM->pszFilename = pszFilename; pSSM->u.Read.pZipDecompV1 = NULL; pSSM->u.Read.uFmtVerMajor = UINT32_MAX; pSSM->u.Read.uFmtVerMinor = UINT32_MAX; pSSM->u.Read.cbFileHdr = UINT32_MAX; pSSM->u.Read.cbGCPhys = UINT8_MAX; pSSM->u.Read.cbGCPtr = UINT8_MAX; pSSM->u.Read.fFixedGCPtrSize= false; pSSM->u.Read.fIsHostMsc32 = SSM_HOST_IS_MSC_32; RT_ZERO(pSSM->u.Read.szHostOSAndArch); pSSM->u.Read.u16VerMajor = UINT16_MAX; pSSM->u.Read.u16VerMinor = UINT16_MAX; pSSM->u.Read.u32VerBuild = UINT32_MAX; pSSM->u.Read.u32SvnRev = UINT32_MAX; pSSM->u.Read.cHostBits = UINT8_MAX; pSSM->u.Read.cbLoadFile = UINT64_MAX; pSSM->u.Read.cbRecLeft = 0; pSSM->u.Read.cbDataBuffer = 0; pSSM->u.Read.offDataBuffer = 0; pSSM->u.Read.fEndOfData = 0; pSSM->u.Read.u8TypeAndFlags = 0; pSSM->u.Read.pCurUnit = NULL; pSSM->u.Read.uCurUnitVer = UINT32_MAX; pSSM->u.Read.uCurUnitPass = 0; pSSM->u.Read.fHaveSetError = false; /* * Try open and validate the file. */ int rc; if (pStreamOps) rc = ssmR3StrmInit(&pSSM->Strm, pStreamOps, pvUser, false /*fWrite*/, fChecksumOnRead, cBuffers); else rc = ssmR3StrmOpenFile(&pSSM->Strm, pszFilename, false /*fWrite*/, fChecksumOnRead, cBuffers); if (RT_SUCCESS(rc)) { rc = ssmR3HeaderAndValidate(pSSM, fChecksumIt, fChecksumOnRead); if (RT_SUCCESS(rc)) return rc; /* failure path */ ssmR3StrmClose(&pSSM->Strm, pSSM->rc == VERR_SSM_CANCELLED); } else Log(("SSM: Failed to open save state file '%s', rc=%Rrc.\n", pszFilename, rc)); return rc; } /** * Verifies the directory. * * @returns VBox status code. * * @param pDir The full directory. * @param cbDir The size of the directory. * @param offDir The directory stream offset. * @param cDirEntries The directory entry count from the footer. * @param cbHdr The header size. * @param uSvnRev The SVN revision that saved the state. Bug detection. */ static int ssmR3ValidateDirectory(PSSMFILEDIR pDir, size_t cbDir, uint64_t offDir, uint32_t cDirEntries, uint32_t cbHdr, uint32_t uSvnRev) { AssertLogRelReturn(!memcmp(pDir->szMagic, SSMFILEDIR_MAGIC, sizeof(pDir->szMagic)), VERR_SSM_INTEGRITY_DIR_MAGIC); SSM_CHECK_CRC32_RET(pDir, cbDir, ("Bad directory CRC: %08x, actual %08x\n", u32CRC, u32ActualCRC)); AssertLogRelMsgReturn(pDir->cEntries == cDirEntries, ("Bad directory entry count: %#x, expected %#x (from the footer)\n", pDir->cEntries, cDirEntries), VERR_SSM_INTEGRITY_DIR); AssertLogRelReturn(RT_UOFFSETOF(SSMFILEDIR, aEntries[pDir->cEntries]) == cbDir, VERR_SSM_INTEGRITY_DIR); for (uint32_t i = 0; i < pDir->cEntries; i++) { AssertLogRelMsgReturn( ( pDir->aEntries[i].off >= cbHdr && pDir->aEntries[i].off < offDir) || ( pDir->aEntries[i].off == 0 /* bug in unreleased code */ && uSvnRev < 53365), ("off=%#llx cbHdr=%#x offDir=%#llx\n", pDir->aEntries[i].off, cbHdr, offDir), VERR_SSM_INTEGRITY_DIR); } return VINF_SUCCESS; } #ifndef SSM_STANDALONE /** * Find a data unit by name. * * @returns Pointer to the unit. * @returns NULL if not found. * * @param pVM Pointer to the VM. * @param pszName Data unit name. * @param uInstance The data unit instance id. */ static PSSMUNIT ssmR3Find(PVM pVM, const char *pszName, uint32_t uInstance) { size_t cchName = strlen(pszName); PSSMUNIT pUnit = pVM->ssm.s.pHead; while ( pUnit && ( pUnit->u32Instance != uInstance || pUnit->cchName != cchName || memcmp(pUnit->szName, pszName, cchName))) pUnit = pUnit->pNext; return pUnit; } /** * Executes the loading of a V1.X file. * * @returns VBox status code. * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3LoadExecV1(PVM pVM, PSSMHANDLE pSSM) { int rc; char *pszName = NULL; size_t cchName = 0; pSSM->enmOp = SSMSTATE_LOAD_EXEC; for (;;) { /* * Save the current file position and read the data unit header. */ uint64_t offUnit = ssmR3StrmTell(&pSSM->Strm); SSMFILEUNITHDRV1 UnitHdr; rc = ssmR3StrmRead(&pSSM->Strm, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV1, szName)); if (RT_SUCCESS(rc)) { /* * Check the magic and see if it's valid and whether it is a end header or not. */ if (memcmp(&UnitHdr.achMagic[0], SSMFILEUNITHDR_MAGIC, sizeof(SSMFILEUNITHDR_MAGIC))) { if (!memcmp(&UnitHdr.achMagic[0], SSMFILEUNITHDR_END, sizeof(SSMFILEUNITHDR_END))) { Log(("SSM: EndOfFile: offset %#9llx size %9d\n", offUnit, UnitHdr.cbUnit)); /* Complete the progress bar (pending 99% afterwards). */ ssmR3ProgressByByte(pSSM, pSSM->cbEstTotal - pSSM->offEst); break; } LogRel(("SSM: Invalid unit magic at offset %#llx (%lld), '%.*s'!\n", offUnit, offUnit, sizeof(UnitHdr.achMagic) - 1, &UnitHdr.achMagic[0])); rc = VERR_SSM_INTEGRITY_UNIT_MAGIC; break; } /* * Read the name. * Adjust the name buffer first. */ if (cchName < UnitHdr.cchName) { if (pszName) RTMemTmpFree(pszName); cchName = RT_ALIGN_Z(UnitHdr.cchName, 64); pszName = (char *)RTMemTmpAlloc(cchName); } if (pszName) { rc = ssmR3StrmRead(&pSSM->Strm, pszName, UnitHdr.cchName); if (RT_SUCCESS(rc)) { if (pszName[UnitHdr.cchName - 1]) { LogRel(("SSM: Unit name '%.*s' was not properly terminated.\n", UnitHdr.cchName, pszName)); rc = VERR_SSM_INTEGRITY_UNIT; break; } Log(("SSM: Data unit: offset %#9llx size %9lld '%s'\n", offUnit, UnitHdr.cbUnit, pszName)); /* * Find the data unit in our internal table. */ PSSMUNIT pUnit = ssmR3Find(pVM, pszName, UnitHdr.u32Instance); if (pUnit) { /* * Call the execute handler. */ pSSM->cbUnitLeftV1 = UnitHdr.cbUnit - RT_OFFSETOF(SSMFILEUNITHDRV1, szName[UnitHdr.cchName]); pSSM->offUnit = 0; pSSM->offUnitUser = 0; pSSM->u.Read.uCurUnitVer = UnitHdr.u32Version; pSSM->u.Read.uCurUnitPass = SSM_PASS_FINAL; pSSM->u.Read.pCurUnit = pUnit; if (!pUnit->u.Common.pfnLoadExec) { LogRel(("SSM: No load exec callback for unit '%s'!\n", pszName)); pSSM->rc = rc = VERR_SSM_NO_LOAD_EXEC; break; } ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLoadExec(pUnit->u.Dev.pDevIns, pSSM, UnitHdr.u32Version, SSM_PASS_FINAL); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLoadExec(pUnit->u.Drv.pDrvIns, pSSM, UnitHdr.u32Version, SSM_PASS_FINAL); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLoadExec(pVM, pSSM, UnitHdr.u32Version, SSM_PASS_FINAL); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLoadExec(pSSM, pUnit->u.External.pvUser, UnitHdr.u32Version, SSM_PASS_FINAL); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; if (RT_FAILURE(rc) && RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; /* * Close the reader stream. */ rc = ssmR3DataReadFinishV1(pSSM); if (RT_SUCCESS(rc)) { /* * Now, we'll check the current position to see if all, or * more than all, the data was read. * * Note! Because of buffering / compression we'll only see the * really bad ones here. */ uint64_t off = ssmR3StrmTell(&pSSM->Strm); int64_t i64Diff = off - (offUnit + UnitHdr.cbUnit); if (i64Diff < 0) { Log(("SSM: Unit '%s' left %lld bytes unread!\n", pszName, -i64Diff)); rc = ssmR3StrmSkipTo(&pSSM->Strm, offUnit + UnitHdr.cbUnit); ssmR3ProgressByByte(pSSM, offUnit + UnitHdr.cbUnit - pSSM->offEst); } else if (i64Diff > 0) { LogRel(("SSM: Unit '%s' read %lld bytes too much!\n", pszName, i64Diff)); if (!ASMAtomicXchgBool(&pSSM->u.Read.fHaveSetError, true)) rc = VMSetError(pVM, VERR_SSM_LOADED_TOO_MUCH, RT_SRC_POS, N_("Unit '%s' read %lld bytes too much"), pszName, i64Diff); break; } pSSM->offUnit = UINT64_MAX; pSSM->offUnitUser = UINT64_MAX; } else { LogRel(("SSM: Load exec failed for '%s' instance #%u ! (version %u)\n", pszName, UnitHdr.u32Instance, UnitHdr.u32Version)); if (!ASMAtomicXchgBool(&pSSM->u.Read.fHaveSetError, true)) { if (rc == VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION) VMSetError(pVM, rc, RT_SRC_POS, N_("Unsupported version %u of data unit '%s' (instance #%u)"), UnitHdr.u32Version, UnitHdr.szName, UnitHdr.u32Instance); else VMSetError(pVM, rc, RT_SRC_POS, N_("Load exec failed for '%s' instance #%u (version %u)"), pszName, UnitHdr.u32Instance, UnitHdr.u32Version); } break; } pSSM->u.Read.pCurUnit = NULL; pSSM->u.Read.uCurUnitVer = UINT32_MAX; pSSM->u.Read.uCurUnitPass = 0; } else { /* * SSM unit wasn't found - ignore this when loading for the debugger. */ LogRel(("SSM: Found no handler for unit '%s'!\n", pszName)); rc = VERR_SSM_INTEGRITY_UNIT_NOT_FOUND; if (pSSM->enmAfter != SSMAFTER_DEBUG_IT) break; rc = ssmR3StrmSkipTo(&pSSM->Strm, offUnit + UnitHdr.cbUnit); } } } else rc = VERR_NO_TMP_MEMORY; } /* * I/O errors ends up here (yea, I know, very nice programming). */ if (RT_FAILURE(rc)) { LogRel(("SSM: I/O error. rc=%Rrc\n", rc)); break; } /* * Check for cancellation. */ if (RT_UNLIKELY(ASMAtomicUoReadU32(&(pSSM)->fCancelled) == SSMHANDLE_CANCELLED)) { LogRel(("SSM: Cancelled!n")); rc = pSSM->rc; if (RT_SUCCESS(pSSM->rc)) pSSM->rc = rc = VERR_SSM_CANCELLED; break; } } RTMemTmpFree(pszName); return rc; } /** * Reads and verifies the directory and footer. * * @returns VBox status code. * @param pSSM The saved state handle. */ static int ssmR3LoadDirectoryAndFooter(PSSMHANDLE pSSM) { /* * The directory. * * Get the header containing the number of entries first. Then read the * entries and pass the combined block to the validation function. */ uint64_t off = ssmR3StrmTell(&pSSM->Strm); size_t const cbDirHdr = RT_OFFSETOF(SSMFILEDIR, aEntries); SSMFILEDIR DirHdr; int rc = ssmR3StrmRead(&pSSM->Strm, &DirHdr, cbDirHdr); if (RT_FAILURE(rc)) return rc; AssertLogRelMsgReturn(!memcmp(DirHdr.szMagic, SSMFILEDIR_MAGIC, sizeof(DirHdr.szMagic)), ("Invalid directory magic at %#llx (%lld): %.*Rhxs\n", off, off, sizeof(DirHdr.szMagic), DirHdr.szMagic), VERR_SSM_INTEGRITY_DIR_MAGIC); AssertLogRelMsgReturn(DirHdr.cEntries < _64K, ("Too many directory entries at %#llx (%lld): %#x\n", off, off, DirHdr.cEntries), VERR_SSM_INTEGRITY_DIR); size_t cbDir = RT_OFFSETOF(SSMFILEDIR, aEntries[DirHdr.cEntries]); PSSMFILEDIR pDir = (PSSMFILEDIR)RTMemTmpAlloc(cbDir); if (!pDir) return VERR_NO_TMP_MEMORY; memcpy(pDir, &DirHdr, cbDirHdr); rc = ssmR3StrmRead(&pSSM->Strm, (uint8_t *)pDir + cbDirHdr, cbDir - cbDirHdr); if (RT_SUCCESS(rc)) rc = ssmR3ValidateDirectory(pDir, cbDir, off, DirHdr.cEntries, pSSM->u.Read.cbFileHdr, pSSM->u.Read.u32SvnRev); RTMemTmpFree(pDir); if (RT_FAILURE(rc)) return rc; /* * Read and validate the footer. */ off = ssmR3StrmTell(&pSSM->Strm); uint32_t u32StreamCRC = ssmR3StrmFinalCRC(&pSSM->Strm); SSMFILEFTR Footer; rc = ssmR3StrmRead(&pSSM->Strm, &Footer, sizeof(Footer)); if (RT_FAILURE(rc)) return rc; return ssmR3ValidateFooter(&Footer, off, DirHdr.cEntries, pSSM->u.Read.fStreamCrc32, u32StreamCRC); } /** * Executes the loading of a V2.X file. * * @returns VBox status code. May or may not set pSSM->rc, the returned * status code is ALWAYS the more accurate of the two. * @param pVM Pointer to the VM. * @param pSSM The saved state handle. */ static int ssmR3LoadExecV2(PVM pVM, PSSMHANDLE pSSM) { pSSM->enmOp = SSMSTATE_LOAD_EXEC; for (;;) { /* * Read the unit header and check its integrity. */ uint64_t offUnit = ssmR3StrmTell(&pSSM->Strm); uint32_t u32CurStreamCRC = ssmR3StrmCurCRC(&pSSM->Strm); SSMFILEUNITHDRV2 UnitHdr; int rc = ssmR3StrmRead(&pSSM->Strm, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName)); if (RT_FAILURE(rc)) return rc; if (RT_UNLIKELY( memcmp(&UnitHdr.szMagic[0], SSMFILEUNITHDR_MAGIC, sizeof(UnitHdr.szMagic)) && memcmp(&UnitHdr.szMagic[0], SSMFILEUNITHDR_END, sizeof(UnitHdr.szMagic)))) { LogRel(("SSM: Unit at %#llx (%lld): Invalid unit magic: %.*Rhxs!\n", offUnit, offUnit, sizeof(UnitHdr.szMagic) - 1, &UnitHdr.szMagic[0])); pSSM->u.Read.fHaveSetError = true; return VMSetError(pVM, VERR_SSM_INTEGRITY_UNIT_MAGIC, RT_SRC_POS, N_("Unit at %#llx (%lld): Invalid unit magic"), offUnit, offUnit); } if (UnitHdr.cbName) { AssertLogRelMsgReturn(UnitHdr.cbName <= sizeof(UnitHdr.szName), ("Unit at %#llx (%lld): UnitHdr.cbName=%u > %u\n", offUnit, offUnit, UnitHdr.cbName, sizeof(UnitHdr.szName)), VERR_SSM_INTEGRITY_UNIT); rc = ssmR3StrmRead(&pSSM->Strm, &UnitHdr.szName[0], UnitHdr.cbName); if (RT_FAILURE(rc)) return rc; AssertLogRelMsgReturn(!UnitHdr.szName[UnitHdr.cbName - 1], ("Unit at %#llx (%lld): Name %.*Rhxs was not properly terminated.\n", offUnit, offUnit, UnitHdr.cbName, UnitHdr.szName), VERR_SSM_INTEGRITY_UNIT); } SSM_CHECK_CRC32_RET(&UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName]), ("Unit at %#llx (%lld): CRC mismatch: %08x, correct is %08x\n", offUnit, offUnit, u32CRC, u32ActualCRC)); AssertLogRelMsgReturn(UnitHdr.offStream == offUnit, ("Unit at %#llx (%lld): offStream=%#llx, expected %#llx\n", offUnit, offUnit, UnitHdr.offStream, offUnit), VERR_SSM_INTEGRITY_UNIT); AssertLogRelMsgReturn(UnitHdr.u32CurStreamCRC == u32CurStreamCRC || !pSSM->Strm.fChecksummed, ("Unit at %#llx (%lld): Stream CRC mismatch: %08x, correct is %08x\n", offUnit, offUnit, UnitHdr.u32CurStreamCRC, u32CurStreamCRC), VERR_SSM_INTEGRITY_UNIT); AssertLogRelMsgReturn(!UnitHdr.fFlags, ("Unit at %#llx (%lld): fFlags=%08x\n", offUnit, offUnit, UnitHdr.fFlags), VERR_SSM_INTEGRITY_UNIT); if (!memcmp(&UnitHdr.szMagic[0], SSMFILEUNITHDR_END, sizeof(UnitHdr.szMagic))) { AssertLogRelMsgReturn( UnitHdr.cbName == 0 && UnitHdr.u32Instance == 0 && UnitHdr.u32Version == 0 && UnitHdr.u32Pass == SSM_PASS_FINAL, ("Unit at %#llx (%lld): Malformed END unit\n", offUnit, offUnit), VERR_SSM_INTEGRITY_UNIT); /* * Complete the progress bar (pending 99% afterwards) and RETURN. */ Log(("SSM: Unit at %#9llx: END UNIT\n", offUnit)); ssmR3ProgressByByte(pSSM, pSSM->cbEstTotal - pSSM->offEst); return ssmR3LoadDirectoryAndFooter(pSSM); } AssertLogRelMsgReturn(UnitHdr.cbName > 1, ("Unit at %#llx (%lld): No name\n", offUnit, offUnit), VERR_SSM_INTEGRITY); Log(("SSM: Unit at %#9llx: '%s', instance %u, pass %#x, version %u\n", offUnit, UnitHdr.szName, UnitHdr.u32Instance, UnitHdr.u32Pass, UnitHdr.u32Version)); /* * Find the data unit in our internal table. */ PSSMUNIT pUnit = ssmR3Find(pVM, UnitHdr.szName, UnitHdr.u32Instance); if (pUnit) { /* * Call the execute handler. */ AssertLogRelMsgReturn(pUnit->u.Common.pfnLoadExec, ("SSM: No load exec callback for unit '%s'!\n", UnitHdr.szName), VERR_SSM_NO_LOAD_EXEC); pSSM->u.Read.uCurUnitVer = UnitHdr.u32Version; pSSM->u.Read.uCurUnitPass = UnitHdr.u32Pass; pSSM->u.Read.pCurUnit = pUnit; ssmR3DataReadBeginV2(pSSM); ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLoadExec(pUnit->u.Dev.pDevIns, pSSM, UnitHdr.u32Version, UnitHdr.u32Pass); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLoadExec(pUnit->u.Drv.pDrvIns, pSSM, UnitHdr.u32Version, UnitHdr.u32Pass); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLoadExec(pVM, pSSM, UnitHdr.u32Version, UnitHdr.u32Pass); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLoadExec(pSSM, pUnit->u.External.pvUser, UnitHdr.u32Version, UnitHdr.u32Pass); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); pUnit->fCalled = true; if (RT_FAILURE(rc) && RT_SUCCESS_NP(pSSM->rc)) pSSM->rc = rc; rc = ssmR3DataReadFinishV2(pSSM); if (RT_SUCCESS(rc)) { pSSM->offUnit = UINT64_MAX; pSSM->offUnitUser = UINT64_MAX; } else { LogRel(("SSM: LoadExec failed for '%s' instance #%u (version %u, pass %#x): %Rrc\n", UnitHdr.szName, UnitHdr.u32Instance, UnitHdr.u32Version, UnitHdr.u32Pass, rc)); if (!ASMAtomicXchgBool(&pSSM->u.Read.fHaveSetError, true)) { if (rc == VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION) rc = VMSetError(pVM, rc, RT_SRC_POS, N_("Unsupported version %u of data unit '%s' (instance #%u, pass %#x)"), UnitHdr.u32Version, UnitHdr.szName, UnitHdr.u32Instance, UnitHdr.u32Pass); else rc = VMSetError(pVM, rc, RT_SRC_POS, N_("Failed to load unit '%s'"), UnitHdr.szName); } return rc; } } else { /* * SSM unit wasn't found - ignore this when loading for the debugger. */ LogRel(("SSM: Found no handler for unit '%s' instance #%u!\n", UnitHdr.szName, UnitHdr.u32Instance)); if (pSSM->enmAfter != SSMAFTER_DEBUG_IT) { pSSM->u.Read.fHaveSetError = true; return VMSetError(pVM, VERR_SSM_INTEGRITY_UNIT_NOT_FOUND, RT_SRC_POS, N_("Found no handler for unit '%s' instance #%u"), UnitHdr.szName, UnitHdr.u32Instance); } SSMR3SkipToEndOfUnit(pSSM); ssmR3DataReadFinishV2(pSSM); } /* * Check for cancellation. */ if (RT_UNLIKELY(ASMAtomicUoReadU32(&(pSSM)->fCancelled) == SSMHANDLE_CANCELLED)) { LogRel(("SSM: Cancelled!\n")); if (RT_SUCCESS(pSSM->rc)) pSSM->rc = VERR_SSM_CANCELLED; return pSSM->rc; } } /* won't get here */ } /** * Load VM save operation. * * @returns VBox status. * * @param pVM Pointer to the VM. * @param pszFilename The name of the saved state file. NULL if pStreamOps * is used. * @param pStreamOps The stream method table. NULL if pszFilename is * used. * @param pvStreamOpsUser The user argument for the stream methods. * @param enmAfter What is planned after a successful load operation. * Only acceptable values are SSMAFTER_RESUME and SSMAFTER_DEBUG_IT. * @param pfnProgress Progress callback. Optional. * @param pvProgressUser User argument for the progress callback. * * @thread EMT */ VMMR3DECL(int) SSMR3Load(PVM pVM, const char *pszFilename, PCSSMSTRMOPS pStreamOps, void *pvStreamOpsUser, SSMAFTER enmAfter, PFNVMPROGRESS pfnProgress, void *pvProgressUser) { LogFlow(("SSMR3Load: pszFilename=%p:{%s} pStreamOps=%p pvStreamOpsUser=%p enmAfter=%d pfnProgress=%p pvProgressUser=%p\n", pszFilename, pszFilename, pStreamOps, pvStreamOpsUser, enmAfter, pfnProgress, pvProgressUser)); VM_ASSERT_EMT0(pVM); /* * Validate input. */ AssertMsgReturn( enmAfter == SSMAFTER_RESUME || enmAfter == SSMAFTER_TELEPORT || enmAfter == SSMAFTER_DEBUG_IT, ("%d\n", enmAfter), VERR_INVALID_PARAMETER); AssertReturn(!pszFilename != !pStreamOps, VERR_INVALID_PARAMETER); if (pStreamOps) { AssertReturn(pStreamOps->u32Version == SSMSTRMOPS_VERSION, VERR_INVALID_MAGIC); AssertReturn(pStreamOps->u32EndVersion == SSMSTRMOPS_VERSION, VERR_INVALID_MAGIC); AssertReturn(pStreamOps->pfnWrite, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnRead, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnSeek, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnTell, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnSize, VERR_INVALID_PARAMETER); AssertReturn(pStreamOps->pfnClose, VERR_INVALID_PARAMETER); } /* * Create the handle and open the file. */ SSMHANDLE Handle; int rc = ssmR3OpenFile(pVM, pszFilename, pStreamOps, pvStreamOpsUser, false /* fChecksumIt */, true /* fChecksumOnRead */, 8 /*cBuffers*/, &Handle); if (RT_SUCCESS(rc)) { ssmR3StrmStartIoThread(&Handle.Strm); ssmR3SetCancellable(pVM, &Handle, true); Handle.enmAfter = enmAfter; Handle.pfnProgress = pfnProgress; Handle.pvUser = pvProgressUser; Handle.uPercentLive = 0; Handle.uPercentPrepare = 2; Handle.uPercentDone = 2; if (Handle.u.Read.u16VerMajor) LogRel(("SSM: File header: Format %u.%u, VirtualBox Version %u.%u.%u r%u, %u-bit host, cbGCPhys=%u, cbGCPtr=%u\n", Handle.u.Read.uFmtVerMajor, Handle.u.Read.uFmtVerMinor, Handle.u.Read.u16VerMajor, Handle.u.Read.u16VerMinor, Handle.u.Read.u32VerBuild, Handle.u.Read.u32SvnRev, Handle.u.Read.cHostBits, Handle.u.Read.cbGCPhys, Handle.u.Read.cbGCPtr)); else LogRel(("SSM: File header: Format %u.%u, %u-bit host, cbGCPhys=%u, cbGCPtr=%u\n" , Handle.u.Read.uFmtVerMajor, Handle.u.Read.uFmtVerMinor, Handle.u.Read.cHostBits, Handle.u.Read.cbGCPhys, Handle.u.Read.cbGCPtr)); if (pfnProgress) pfnProgress(pVM->pUVM, Handle.uPercent, pvProgressUser); /* * Clear the per unit flags. */ PSSMUNIT pUnit; for (pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) pUnit->fCalled = false; /* * Do the prepare run. */ Handle.rc = VINF_SUCCESS; Handle.enmOp = SSMSTATE_LOAD_PREP; for (pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { if (pUnit->u.Common.pfnLoadPrep) { Handle.u.Read.pCurUnit = pUnit; pUnit->fCalled = true; ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLoadPrep(pUnit->u.Dev.pDevIns, &Handle); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLoadPrep(pUnit->u.Drv.pDrvIns, &Handle); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLoadPrep(pVM, &Handle); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLoadPrep(&Handle, pUnit->u.External.pvUser); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); Handle.u.Read.pCurUnit = NULL; if (RT_FAILURE(rc) && RT_SUCCESS_NP(Handle.rc)) Handle.rc = rc; else rc = Handle.rc; if (RT_FAILURE(rc)) { LogRel(("SSM: Prepare load failed with rc=%Rrc for data unit '%s.\n", rc, pUnit->szName)); break; } } } /* end of prepare % */ if (pfnProgress) pfnProgress(pVM->pUVM, Handle.uPercentPrepare - 1, pvProgressUser); Handle.uPercent = Handle.uPercentPrepare; Handle.cbEstTotal = Handle.u.Read.cbLoadFile; Handle.offEstUnitEnd = Handle.u.Read.cbLoadFile; /* * Do the execute run. */ if (RT_SUCCESS(rc)) { if (Handle.u.Read.uFmtVerMajor >= 2) rc = ssmR3LoadExecV2(pVM, &Handle); else rc = ssmR3LoadExecV1(pVM, &Handle); Handle.u.Read.pCurUnit = NULL; Handle.u.Read.uCurUnitVer = UINT32_MAX; Handle.u.Read.uCurUnitPass = 0; /* (progress should be pending 99% now) */ AssertMsg( Handle.fLiveSave || RT_FAILURE(rc) || Handle.uPercent == 101 - Handle.uPercentDone, ("%d\n", Handle.uPercent)); } /* * Do the done run. */ Handle.rc = rc; Handle.enmOp = SSMSTATE_LOAD_DONE; for (pUnit = pVM->ssm.s.pHead; pUnit; pUnit = pUnit->pNext) { if ( pUnit->u.Common.pfnLoadDone && ( pUnit->fCalled || (!pUnit->u.Common.pfnLoadPrep && !pUnit->u.Common.pfnLoadExec))) { Handle.u.Read.pCurUnit = pUnit; int const rcOld = Handle.rc; rc = VINF_SUCCESS; ssmR3UnitCritSectEnter(pUnit); switch (pUnit->enmType) { case SSMUNITTYPE_DEV: rc = pUnit->u.Dev.pfnLoadDone(pUnit->u.Dev.pDevIns, &Handle); break; case SSMUNITTYPE_DRV: rc = pUnit->u.Drv.pfnLoadDone(pUnit->u.Drv.pDrvIns, &Handle); break; case SSMUNITTYPE_INTERNAL: rc = pUnit->u.Internal.pfnLoadDone(pVM, &Handle); break; case SSMUNITTYPE_EXTERNAL: rc = pUnit->u.External.pfnLoadDone(&Handle, pUnit->u.External.pvUser); break; default: rc = VERR_SSM_IPE_1; break; } ssmR3UnitCritSectLeave(pUnit); Handle.u.Read.pCurUnit = NULL; if (RT_SUCCESS(rc) && Handle.rc != rcOld) rc = Handle.rc; if (RT_FAILURE(rc)) { LogRel(("SSM: LoadDone failed with rc=%Rrc for data unit '%s' instance #%u.\n", rc, pUnit->szName, pUnit->u32Instance)); if (!ASMAtomicXchgBool(&Handle.u.Read.fHaveSetError, true)) VMSetError(pVM, rc, RT_SRC_POS, N_("LoadDone failed with rc=%Rrc for data unit '%s' instance #%u."), rc, pUnit->szName, pUnit->u32Instance); if (RT_SUCCESS_NP(Handle.rc)) Handle.rc = rc; } } } /* progress */ if (pfnProgress) pfnProgress(pVM->pUVM, 99, pvProgressUser); ssmR3SetCancellable(pVM, &Handle, false); ssmR3StrmClose(&Handle.Strm, Handle.rc == VERR_SSM_CANCELLED); rc = Handle.rc; } /* * Done */ if (RT_SUCCESS(rc)) { /* progress */ if (pfnProgress) pfnProgress(pVM->pUVM, 100, pvProgressUser); Log(("SSM: Load of '%s' completed!\n", pszFilename)); } return rc; } /** * VMSetError wrapper for load errors that inserts the saved state details. * * @returns rc. * @param pSSM The saved state handle. * @param rc The status code of the error. Use RT_SRC_POS. * @param RT_SRC_POS_DECL The source location. * @param pszFormat The message format string. * @param ... Variable argument list. */ VMMR3DECL(int) SSMR3SetLoadError(PSSMHANDLE pSSM, int rc, RT_SRC_POS_DECL, const char *pszFormat, ...) { va_list va; va_start(va, pszFormat); rc = SSMR3SetLoadErrorV(pSSM, rc, RT_SRC_POS_ARGS, pszFormat, va); va_end(va); return rc; } /** * VMSetError wrapper for load errors that inserts the saved state details. * * @returns rc. * @param pSSM The saved state handle. * @param rc The status code of the error. * @param RT_SRC_POS_DECL The error location, use RT_SRC_POS. * @param pszFormat The message format string. * @param va Variable argument list. */ VMMR3DECL(int) SSMR3SetLoadErrorV(PSSMHANDLE pSSM, int rc, RT_SRC_POS_DECL, const char *pszFormat, va_list va) { /* * Input validations. */ SSM_ASSERT_READABLE_RET(pSSM); AssertPtr(pszFormat); Assert(RT_FAILURE_NP(rc)); /* * Format the incoming error. */ char *pszMsg; RTStrAPrintfV(&pszMsg, pszFormat, va); if (!pszMsg) { VMSetError(pSSM->pVM, VERR_NO_MEMORY, RT_SRC_POS, N_("SSMR3SetLoadErrorV ran out of memory formatting: %s\n"), pszFormat); return rc; } /* * Forward to VMSetError with the additional info. */ PSSMUNIT pUnit = pSSM->u.Read.pCurUnit; const char *pszName = pUnit ? pUnit->szName : "unknown"; uint32_t uInstance = pUnit ? pUnit->u32Instance : 0; if ( pSSM->enmOp == SSMSTATE_LOAD_EXEC && pSSM->u.Read.uCurUnitPass == SSM_PASS_FINAL) rc = VMSetError(pSSM->pVM, rc, RT_SRC_POS_ARGS, N_("%s#%u: %s [ver=%u pass=final]"), pszName, uInstance, pszMsg, pSSM->u.Read.uCurUnitVer); else if (pSSM->enmOp == SSMSTATE_LOAD_EXEC) rc = VMSetError(pSSM->pVM, rc, RT_SRC_POS_ARGS, N_("%s#%u: %s [ver=%u pass=#%u]"), pszName, uInstance, pszMsg, pSSM->u.Read.uCurUnitVer, pSSM->u.Read.uCurUnitPass); else if (pSSM->enmOp == SSMSTATE_LOAD_PREP) rc = VMSetError(pSSM->pVM, rc, RT_SRC_POS_ARGS, N_("%s#%u: %s [prep]"), pszName, uInstance, pszMsg); else if (pSSM->enmOp == SSMSTATE_LOAD_DONE) rc = VMSetError(pSSM->pVM, rc, RT_SRC_POS_ARGS, N_("%s#%u: %s [done]"), pszName, uInstance, pszMsg); else if (pSSM->enmOp == SSMSTATE_OPEN_READ) rc = VMSetError(pSSM->pVM, rc, RT_SRC_POS_ARGS, N_("%s#%u: %s [read]"), pszName, uInstance, pszMsg); else AssertFailed(); pSSM->u.Read.fHaveSetError = true; RTStrFree(pszMsg); return rc; } /** * SSMR3SetLoadError wrapper that returns VERR_SSM_LOAD_CONFIG_MISMATCH. * * @returns VERR_SSM_LOAD_CONFIG_MISMATCH. * @param pSSM The saved state handle. * @param RT_SRC_POS_DECL The error location, use RT_SRC_POS. * @param pszFormat The message format string. * @param va Variable argument list. */ VMMR3DECL(int) SSMR3SetCfgError(PSSMHANDLE pSSM, RT_SRC_POS_DECL, const char *pszFormat, ...) { va_list va; va_start(va, pszFormat); int rc = SSMR3SetLoadErrorV(pSSM, VERR_SSM_LOAD_CONFIG_MISMATCH, RT_SRC_POS_ARGS, pszFormat, va); va_end(va); return rc; } #endif /* !SSM_STANDALONE */ /** * Validates a file as a validate SSM saved state. * * This will only verify the file format, the format and content of individual * data units are not inspected. * * @returns VINF_SUCCESS if valid. * @returns VBox status code on other failures. * * @param pszFilename The path to the file to validate. * @param fChecksumIt Whether to checksum the file or not. * * @thread Any. */ VMMR3DECL(int) SSMR3ValidateFile(const char *pszFilename, bool fChecksumIt) { LogFlow(("SSMR3ValidateFile: pszFilename=%p:{%s} fChecksumIt=%RTbool\n", pszFilename, pszFilename, fChecksumIt)); /* * Try open the file and validate it. */ SSMHANDLE Handle; int rc = ssmR3OpenFile(NULL, pszFilename, NULL /*pStreamOps*/, NULL /*pvUser*/, fChecksumIt, false /*fChecksumOnRead*/, 1 /*cBuffers*/, &Handle); if (RT_SUCCESS(rc)) ssmR3StrmClose(&Handle.Strm, false /*fCancelled*/); else Log(("SSM: Failed to open saved state file '%s', rc=%Rrc.\n", pszFilename, rc)); return rc; } /** * Opens a saved state file for reading. * * @returns VBox status code. * * @param pszFilename The path to the saved state file. * @param fFlags Open flags. Reserved, must be 0. * @param ppSSM Where to store the SSM handle. * * @thread Any. */ VMMR3DECL(int) SSMR3Open(const char *pszFilename, unsigned fFlags, PSSMHANDLE *ppSSM) { LogFlow(("SSMR3Open: pszFilename=%p:{%s} fFlags=%#x ppSSM=%p\n", pszFilename, pszFilename, fFlags, ppSSM)); /* * Validate input. */ AssertMsgReturn(VALID_PTR(pszFilename), ("%p\n", pszFilename), VERR_INVALID_PARAMETER); AssertMsgReturn(!fFlags, ("%#x\n", fFlags), VERR_INVALID_PARAMETER); AssertMsgReturn(VALID_PTR(ppSSM), ("%p\n", ppSSM), VERR_INVALID_PARAMETER); /* * Allocate a handle. */ PSSMHANDLE pSSM = (PSSMHANDLE)RTMemAllocZ(sizeof(*pSSM)); AssertReturn(pSSM, VERR_NO_MEMORY); /* * Try open the file and validate it. */ int rc = ssmR3OpenFile(NULL, pszFilename, NULL /*pStreamOps*/, NULL /*pvUser*/, false /*fChecksumIt*/, true /*fChecksumOnRead*/, 1 /*cBuffers*/, pSSM); if (RT_SUCCESS(rc)) { pSSM->enmAfter = SSMAFTER_OPENED; pSSM->enmOp = SSMSTATE_OPEN_READ; *ppSSM = pSSM; LogFlow(("SSMR3Open: returns VINF_SUCCESS *ppSSM=%p\n", *ppSSM)); return VINF_SUCCESS; } Log(("SSMR3Open: Failed to open saved state file '%s', rc=%Rrc.\n", pszFilename, rc)); RTMemFree(pSSM); return rc; } /** * Closes a saved state file opened by SSMR3Open(). * * @returns VBox status code. * * @param pSSM The SSM handle returned by SSMR3Open(). * * @thread Any, but the caller is responsible for serializing calls per handle. */ VMMR3DECL(int) SSMR3Close(PSSMHANDLE pSSM) { LogFlow(("SSMR3Close: pSSM=%p\n", pSSM)); /* * Validate input. */ AssertMsgReturn(VALID_PTR(pSSM), ("%p\n", pSSM), VERR_INVALID_PARAMETER); AssertMsgReturn(pSSM->enmAfter == SSMAFTER_OPENED, ("%d\n", pSSM->enmAfter),VERR_INVALID_PARAMETER); AssertMsgReturn(pSSM->enmOp == SSMSTATE_OPEN_READ, ("%d\n", pSSM->enmOp), VERR_INVALID_PARAMETER); Assert(pSSM->fCancelled == SSMHANDLE_OK); /* * Close the stream and free the handle. */ int rc = ssmR3StrmClose(&pSSM->Strm, pSSM->rc == VERR_SSM_CANCELLED); if (pSSM->u.Read.pZipDecompV1) { RTZipDecompDestroy(pSSM->u.Read.pZipDecompV1); pSSM->u.Read.pZipDecompV1 = NULL; } RTMemFree(pSSM); return rc; } /** * Worker for SSMR3Seek that seeks version 1 saved state files. * * @returns VBox status code. * @param pSSM The SSM handle. * @param pszUnit The unit to seek to. * @param iInstance The particular instance we seek. * @param piVersion Where to store the unit version number. */ static int ssmR3FileSeekV1(PSSMHANDLE pSSM, const char *pszUnit, uint32_t iInstance, uint32_t *piVersion) { /* * Walk the data units until we find EOF or a match. */ size_t cbUnitNm = strlen(pszUnit) + 1; AssertLogRelReturn(cbUnitNm <= SSM_MAX_NAME_SIZE, VERR_SSM_UNIT_NOT_FOUND); char szName[SSM_MAX_NAME_SIZE]; SSMFILEUNITHDRV1 UnitHdr; for (RTFOFF off = pSSM->u.Read.cbFileHdr; ; off += UnitHdr.cbUnit) { /* * Read the unit header and verify it. */ int rc = ssmR3StrmPeekAt(&pSSM->Strm, off, &UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV1, szName), NULL); AssertRCReturn(rc, rc); if (!memcmp(&UnitHdr.achMagic[0], SSMFILEUNITHDR_MAGIC, sizeof(SSMFILEUNITHDR_MAGIC))) { /* * Does what we've got match, if so read the name. */ if ( UnitHdr.u32Instance == iInstance && UnitHdr.cchName == cbUnitNm) { rc = ssmR3StrmPeekAt(&pSSM->Strm, off + RT_OFFSETOF(SSMFILEUNITHDRV1, szName), szName, cbUnitNm, NULL); AssertRCReturn(rc, rc); AssertLogRelMsgReturn(!szName[UnitHdr.cchName - 1], (" Unit name '%.*s' was not properly terminated.\n", cbUnitNm, szName), VERR_SSM_INTEGRITY_UNIT); /* * Does the name match? */ if (!memcmp(szName, pszUnit, cbUnitNm)) { rc = ssmR3StrmSeek(&pSSM->Strm, off + RT_OFFSETOF(SSMFILEUNITHDRV1, szName) + cbUnitNm, RTFILE_SEEK_BEGIN, 0); pSSM->cbUnitLeftV1 = UnitHdr.cbUnit - RT_OFFSETOF(SSMFILEUNITHDRV1, szName[cbUnitNm]); pSSM->offUnit = 0; pSSM->offUnitUser = 0; if (piVersion) *piVersion = UnitHdr.u32Version; return VINF_SUCCESS; } } } else if (!memcmp(&UnitHdr.achMagic[0], SSMFILEUNITHDR_END, sizeof(SSMFILEUNITHDR_END))) return VERR_SSM_UNIT_NOT_FOUND; else AssertLogRelMsgFailedReturn(("Invalid unit magic at offset %RTfoff, '%.*s'!\n", off, sizeof(UnitHdr.achMagic) - 1, &UnitHdr.achMagic[0]), VERR_SSM_INTEGRITY_UNIT_MAGIC); } /* won't get here. */ } /** * Worker for ssmR3FileSeekV2 for simplifying memory cleanup. * * @returns VBox status code. * @param pSSM The SSM handle. * @param pDir The directory buffer. * @param cbDir The size of the directory. * @param cDirEntries The number of directory entries. * @param offDir The directory offset in the file. * @param pszUnit The unit to seek to. * @param iInstance The particular instance we seek. * @param piVersion Where to store the unit version number. */ static int ssmR3FileSeekSubV2(PSSMHANDLE pSSM, PSSMFILEDIR pDir, size_t cbDir, uint32_t cDirEntries, uint64_t offDir, const char *pszUnit, uint32_t iInstance, uint32_t *piVersion) { /* * Read it. */ int rc = ssmR3StrmPeekAt(&pSSM->Strm, offDir, pDir, cbDir, NULL); AssertLogRelRCReturn(rc, rc); rc = ssmR3ValidateDirectory(pDir, (uint32_t)cbDir, offDir, cDirEntries, pSSM->u.Read.cbFileHdr, pSSM->u.Read.u32SvnRev); if (RT_FAILURE(rc)) return rc; /* * Search the directory. */ size_t cbUnitNm = strlen(pszUnit) + 1; uint32_t const u32NameCRC = RTCrc32(pszUnit, cbUnitNm - 1); for (uint32_t i = 0; i < cDirEntries; i++) { if ( pDir->aEntries[i].u32NameCRC == u32NameCRC && pDir->aEntries[i].u32Instance == iInstance && pDir->aEntries[i].off != 0 /* bug in unreleased code */ ) { /* * Read and validate the unit header. */ SSMFILEUNITHDRV2 UnitHdr; size_t cbToRead = sizeof(UnitHdr); if (pDir->aEntries[i].off + cbToRead > offDir) { cbToRead = offDir - pDir->aEntries[i].off; RT_ZERO(UnitHdr); } rc = ssmR3StrmPeekAt(&pSSM->Strm, pDir->aEntries[i].off, &UnitHdr, cbToRead, NULL); AssertLogRelRCReturn(rc, rc); AssertLogRelMsgReturn(!memcmp(UnitHdr.szMagic, SSMFILEUNITHDR_MAGIC, sizeof(UnitHdr.szMagic)), ("Bad unit header or dictionary offset: i=%u off=%lld\n", i, pDir->aEntries[i].off), VERR_SSM_INTEGRITY_UNIT); AssertLogRelMsgReturn(UnitHdr.offStream == pDir->aEntries[i].off, ("Bad unit header: i=%d off=%lld offStream=%lld\n", i, pDir->aEntries[i].off, UnitHdr.offStream), VERR_SSM_INTEGRITY_UNIT); AssertLogRelMsgReturn(UnitHdr.u32Instance == pDir->aEntries[i].u32Instance, ("Bad unit header: i=%d off=%lld u32Instance=%u Dir.u32Instance=%u\n", i, pDir->aEntries[i].off, UnitHdr.u32Instance, pDir->aEntries[i].u32Instance), VERR_SSM_INTEGRITY_UNIT); uint32_t cbUnitHdr = RT_UOFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName]); AssertLogRelMsgReturn( UnitHdr.cbName > 0 && UnitHdr.cbName < sizeof(UnitHdr) && cbUnitHdr <= cbToRead, ("Bad unit header: i=%u off=%lld cbName=%#x cbToRead=%#x\n", i, pDir->aEntries[i].off, UnitHdr.cbName, cbToRead), VERR_SSM_INTEGRITY_UNIT); SSM_CHECK_CRC32_RET(&UnitHdr, RT_OFFSETOF(SSMFILEUNITHDRV2, szName[UnitHdr.cbName]), ("Bad unit header CRC: i=%u off=%lld u32CRC=%#x u32ActualCRC=%#x\n", i, pDir->aEntries[i].off, u32CRC, u32ActualCRC)); /* * Ok, it is valid, get on with the comparing now. */ if ( UnitHdr.cbName == cbUnitNm && !memcmp(UnitHdr.szName, pszUnit, cbUnitNm)) { if (piVersion) *piVersion = UnitHdr.u32Version; rc = ssmR3StrmSeek(&pSSM->Strm, pDir->aEntries[i].off + cbUnitHdr, RTFILE_SEEK_BEGIN, RTCrc32Process(UnitHdr.u32CurStreamCRC, &UnitHdr, cbUnitHdr)); AssertLogRelRCReturn(rc, rc); ssmR3DataReadBeginV2(pSSM); return VINF_SUCCESS; } } } return VERR_SSM_UNIT_NOT_FOUND; } /** * Worker for SSMR3Seek that seeks version 2 saved state files. * * @returns VBox status code. * @param pSSM The SSM handle. * @param pszUnit The unit to seek to. * @param iInstance The particular instance we seek. * @param piVersion Where to store the unit version number. */ static int ssmR3FileSeekV2(PSSMHANDLE pSSM, const char *pszUnit, uint32_t iInstance, uint32_t *piVersion) { /* * Read the footer, allocate a temporary buffer for the dictionary and * pass it down to a worker to simplify cleanup. */ uint64_t offFooter; SSMFILEFTR Footer; int rc = ssmR3StrmPeekAt(&pSSM->Strm, -(RTFOFF)sizeof(Footer), &Footer, sizeof(Footer), &offFooter); AssertLogRelRCReturn(rc, rc); AssertLogRelReturn(!memcmp(Footer.szMagic, SSMFILEFTR_MAGIC, sizeof(Footer.szMagic)), VERR_SSM_INTEGRITY); SSM_CHECK_CRC32_RET(&Footer, sizeof(Footer), ("Bad footer CRC: %08x, actual %08x\n", u32CRC, u32ActualCRC)); size_t const cbDir = RT_OFFSETOF(SSMFILEDIR, aEntries[Footer.cDirEntries]); PSSMFILEDIR pDir = (PSSMFILEDIR)RTMemTmpAlloc(cbDir); if (RT_UNLIKELY(!pDir)) return VERR_NO_TMP_MEMORY; rc = ssmR3FileSeekSubV2(pSSM, pDir, cbDir, Footer.cDirEntries, offFooter - cbDir, pszUnit, iInstance, piVersion); RTMemTmpFree(pDir); return rc; } /** * Seeks to a specific data unit. * * After seeking it's possible to use the getters to on * that data unit. * * @returns VBox status code. * @returns VERR_SSM_UNIT_NOT_FOUND if the unit+instance wasn't found. * * @param pSSM The SSM handle returned by SSMR3Open(). * @param pszUnit The name of the data unit. * @param iInstance The instance number. * @param piVersion Where to store the version number. (Optional) * * @thread Any, but the caller is responsible for serializing calls per handle. */ VMMR3DECL(int) SSMR3Seek(PSSMHANDLE pSSM, const char *pszUnit, uint32_t iInstance, uint32_t *piVersion) { LogFlow(("SSMR3Seek: pSSM=%p pszUnit=%p:{%s} iInstance=%RU32 piVersion=%p\n", pSSM, pszUnit, pszUnit, iInstance, piVersion)); /* * Validate input. */ AssertPtrReturn(pSSM, VERR_INVALID_PARAMETER); AssertMsgReturn(pSSM->enmAfter == SSMAFTER_OPENED, ("%d\n", pSSM->enmAfter),VERR_INVALID_PARAMETER); AssertMsgReturn(pSSM->enmOp == SSMSTATE_OPEN_READ, ("%d\n", pSSM->enmOp), VERR_INVALID_PARAMETER); AssertPtrReturn(pszUnit, VERR_INVALID_POINTER); AssertMsgReturn(!piVersion || VALID_PTR(piVersion), ("%p\n", piVersion), VERR_INVALID_POINTER); /* * Reset the state. */ if (pSSM->u.Read.pZipDecompV1) { RTZipDecompDestroy(pSSM->u.Read.pZipDecompV1); pSSM->u.Read.pZipDecompV1 = NULL; } pSSM->cbUnitLeftV1 = 0; pSSM->offUnit = UINT64_MAX; pSSM->offUnitUser = UINT64_MAX; /* * Call the version specific workers. */ if (pSSM->u.Read.uFmtVerMajor >= 2) pSSM->rc = ssmR3FileSeekV2(pSSM, pszUnit, iInstance, piVersion); else pSSM->rc = ssmR3FileSeekV1(pSSM, pszUnit, iInstance, piVersion); return pSSM->rc; } /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /* ... Misc APIs ... */ /** * Query what the VBox status code of the operation is. * * This can be used for putting and getting a batch of values * without bother checking the result till all the calls have * been made. * * @returns SSMAFTER enum value. * @param pSSM The saved state handle. */ VMMR3DECL(int) SSMR3HandleGetStatus(PSSMHANDLE pSSM) { SSM_ASSERT_VALID_HANDLE(pSSM); return pSSM->rc; } /** * Fail the load operation. * * This is mainly intended for sub item loaders (like timers) which * return code isn't necessarily heeded by the caller but is important * to SSM. * * @returns VBox status code of the handle, or VERR_INVALID_PARAMETER. * @param pSSM The saved state handle. * @param iStatus Failure status code. This MUST be a VERR_*. */ VMMR3DECL(int) SSMR3HandleSetStatus(PSSMHANDLE pSSM, int iStatus) { SSM_ASSERT_VALID_HANDLE(pSSM); Assert(pSSM->enmOp != SSMSTATE_LIVE_VOTE); if (RT_FAILURE(iStatus)) { int rc = pSSM->rc; if (RT_SUCCESS(rc)) pSSM->rc = rc = iStatus; return rc; } AssertMsgFailed(("iStatus=%d %Rrc\n", iStatus, iStatus)); return VERR_INVALID_PARAMETER; } /** * Get what to do after this operation. * * @returns SSMAFTER enum value. * @param pSSM The saved state handle. */ VMMR3DECL(SSMAFTER) SSMR3HandleGetAfter(PSSMHANDLE pSSM) { SSM_ASSERT_VALID_HANDLE(pSSM); return pSSM->enmAfter; } /** * Checks if it is a live save operation or not. * * @returns True if it is, false if it isn't. * @param pSSM The saved state handle. */ VMMR3DECL(bool) SSMR3HandleIsLiveSave(PSSMHANDLE pSSM) { SSM_ASSERT_VALID_HANDLE(pSSM); return pSSM->fLiveSave; } /** * Gets the maximum downtime for a live operation. * * @returns The max downtime in milliseconds. Can be anything from 0 thru * UINT32_MAX. * * @param pSSM The saved state handle. */ VMMR3DECL(uint32_t) SSMR3HandleMaxDowntime(PSSMHANDLE pSSM) { SSM_ASSERT_VALID_HANDLE(pSSM); if (pSSM->enmOp <= SSMSTATE_SAVE_DONE) return pSSM->u.Write.cMsMaxDowntime; return UINT32_MAX; } /** * Gets the host bit count of a saved state. * * @returns 32 or 64. If pSSM is invalid, 0 is returned. * @param pSSM The saved state handle. * * @remarks This method should ONLY be used for hacks when loading OLDER saved * state that have data layout or semantic changes without the * compulsory version number change. */ VMMR3DECL(uint32_t) SSMR3HandleHostBits(PSSMHANDLE pSSM) { SSM_ASSERT_VALID_HANDLE(pSSM); return ssmR3GetHostBits(pSSM); } /** * Get the VirtualBox SVN revision that created the saved state. * * @returns The revision number on success. * form. If we don't know, it's 0. * @param pSSM The saved state handle. * * @remarks This method should ONLY be used for hacks when loading OLDER saved * state that have data layout or semantic changes without the * compulsory version number change. Be VERY careful with this * function since it will return different values for OSE builds! */ VMMR3DECL(uint32_t) SSMR3HandleRevision(PSSMHANDLE pSSM) { if (pSSM->enmOp >= SSMSTATE_LOAD_PREP) return pSSM->u.Read.u32SvnRev; #ifdef SSM_STANDALONE return 0; #else return VMMGetSvnRev(); #endif } /** * Gets the VirtualBox version that created the saved state. * * @returns VBOX_FULL_VERSION style version number. * Returns UINT32_MAX if unknown or somehow out of range. * * @param pSSM The saved state handle. * * @remarks This method should ONLY be used for hacks when loading OLDER saved * state that have data layout or semantic changes without the * compulsory version number change. */ VMMR3DECL(uint32_t) SSMR3HandleVersion(PSSMHANDLE pSSM) { if (pSSM->enmOp >= SSMSTATE_LOAD_PREP) { if ( !pSSM->u.Read.u16VerMajor && !pSSM->u.Read.u16VerMinor && !pSSM->u.Read.u32VerBuild) return UINT32_MAX; AssertReturn(pSSM->u.Read.u16VerMajor <= 0xff, UINT32_MAX); AssertReturn(pSSM->u.Read.u16VerMinor <= 0xff, UINT32_MAX); AssertReturn(pSSM->u.Read.u32VerBuild <= 0xffff, UINT32_MAX); return VBOX_FULL_VERSION_MAKE(pSSM->u.Read.u16VerMajor, pSSM->u.Read.u16VerMinor, pSSM->u.Read.u32VerBuild); } return VBOX_FULL_VERSION; } /** * Get the host OS and architecture where the saved state was created. * * @returns Pointer to a read only string. When known, this is on the os.arch * form. If we don't know, it's an empty string. * @param pSSM The saved state handle. * * @remarks This method should ONLY be used for hacks when loading OLDER saved * state that have data layout or semantic changes without the * compulsory version number change. */ VMMR3DECL(const char *) SSMR3HandleHostOSAndArch(PSSMHANDLE pSSM) { if (pSSM->enmOp >= SSMSTATE_LOAD_PREP) return pSSM->u.Read.szHostOSAndArch; return KBUILD_TARGET "." KBUILD_TARGET_ARCH; } #ifndef SSM_STANDALONE /** * Asynchronously cancels the current SSM operation ASAP. * * @returns VBox status code. * @retval VINF_SUCCESS on success. * @retval VERR_SSM_NO_PENDING_OPERATION if nothing around that can be * cancelled. * @retval VERR_SSM_ALREADY_CANCELLED if the operation as already been * cancelled. * * @param pUVM The VM handle. * * @thread Any. */ VMMR3DECL(int) SSMR3Cancel(PUVM pUVM) { UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE); PVM pVM = pUVM->pVM; VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE); int rc = RTCritSectEnter(&pVM->ssm.s.CancelCritSect); AssertRCReturn(rc, rc); PSSMHANDLE pSSM = pVM->ssm.s.pSSM; if (pSSM) { uint32_t u32Old; if (ASMAtomicCmpXchgExU32(&pSSM->fCancelled, SSMHANDLE_CANCELLED, SSMHANDLE_OK, &u32Old)) { LogRel(("SSM: Cancelled pending operation\n")); rc = VINF_SUCCESS; } else if (u32Old == SSMHANDLE_CANCELLED) rc = VERR_SSM_ALREADY_CANCELLED; else { AssertLogRelMsgFailed(("fCancelled=%RX32 enmOp=%d\n", u32Old, pSSM->enmOp)); rc = VERR_SSM_IPE_3; } } else rc = VERR_SSM_NO_PENDING_OPERATION; RTCritSectLeave(&pVM->ssm.s.CancelCritSect); return rc; } #endif /* !SSM_STANDALONE */