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diff --git a/tags/xmount-0.4.4/xmount.c b/tags/xmount-0.4.4/xmount.c
index 41b1886..0bf4b6f 100755
--- a/tags/xmount-0.4.4/xmount.c
+++ b/tags/xmount-0.4.4/xmount.c
@@ -1,2732 +1,2738 @@
/*******************************************************************************
* xmount Copyright (c) 2008,2009 by Gillen Daniel <gillen.dan@pinguin.lu> *
* *
* xmount is a small tool to "fuse mount" various harddisk image formats as dd, *
* vdi or vmdk files and enable virtual write access to them. *
* *
* This program is free software: you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the Free *
* Software Foundation, either version 3 of the License, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for *
* more details. *
* *
* You should have received a copy of the GNU General Public License along with *
* this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************/
#define HAVE_LIBAFF_STATIC
#define HAVE_LIBEWF_STATIC
#ifdef HAVE_LIBEWF
#define WITH_LIBEWF
#endif
#ifdef HAVE_LIBAFF_STATIC
#define WITH_LIBEWF
#endif
#ifdef HAVE_LIBAFF
#define WITH_LIBAFF
#endif
#ifdef HAVE_LIBAFF_STATIC
#define WITH_LIBAFF
#endif
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <pthread.h>
#include <stdint.h>
#ifdef HAVE_LIBEWF
#include <libewf.h>
#endif
#ifdef HAVE_LIBEWF_STATIC
#include "libewf/include/libewf.h"
#endif
#ifdef HAVE_LIBAFF
#include <libaff.h>
#endif
#ifdef HAVE_LIBAFF_STATIC
#include "libaff/lib/afflib.h"
#endif
#include "xmount.h"
#include "md5.h"
// Some constant values
#define IMAGE_INFO_HEADER "The following values have been extracted from " \
"the mounted image file:\n\n"
#define VDI_FILE_COMMENT "<<< This is a virtual VDI image >>>"
#define VDI_HEADER_COMMENT "This VDI was emulated using xmount v" \
PACKAGE_VERSION
// Struct that contains various runtime configuration options
static TXMountConfData XMountConfData;
// Handles for input image types
static FILE *hDdFile=NULL;
#ifdef WITH_LIBEWF
static LIBEWF_HANDLE *hEwfFile=NULL;
#endif
#ifdef WITH_LIBAFF
static AFFILE *hAffFile=NULL;
#endif
// Pointer to virtual info file
static char *pVirtualImageInfoFile=NULL;
// Vars needed for VDI emulation
static TVdiFileHeader *pVdiFileHeader=NULL;
static uint32_t VdiFileHeaderSize=0;
static char *pVdiBlockMap=NULL;
static uint32_t VdiBlockMapSize=0;
// Vars needed for VMDK emulation
static char *pVirtualVmdkFile=NULL;
static int VirtualVmdkFileSize=0;
static char *pVirtualVmdkLockDir=NULL;
static char *pVirtualVmdkLockDir2=NULL;
static char *pVirtualVmdkLockFileData=NULL;
static int VirtualVmdkLockFileDataSize=0;
static char *pVirtualVmdkLockFileName=NULL;
// Vars needed for virtual write access
static FILE *hCacheFile=NULL;
static pTCacheFileHeader pCacheFileHeader=NULL;
static pTCacheFileBlockIndex pCacheFileBlockIndex=NULL;
// Mutexes to control concurrent read & write access
static pthread_mutex_t mutex_image_rw;
static pthread_mutex_t mutex_info_read;
/*
* LogMessage:
* Print error and debug messages to stdout
*
* Params:
* pMessageType: "ERROR" or "DEBUG"
* pCallingFunction: Name of calling function
* line: Line number of call
* pMessage: Message string
* ...: Variable params with values to include in message string
*
* Returns:
* n/a
*/
static void LogMessage(char *pMessageType,
char *pCallingFunction,
int line,
char *pMessage,
...)
{
va_list VaList;
// Print message "header"
printf("%s: %s.%s@%u : ",pMessageType,pCallingFunction,PACKAGE_VERSION,line);
// Print message with variable parameters
va_start(VaList,pMessage);
vprintf(pMessage,VaList);
va_end(VaList);
}
/*
* LogWarnMessage:
* Print warning messages to stdout
*
* Params:
* pMessage: Message string
* ...: Variable params with values to include in message string
*
* Returns:
* n/a
*/
static void LogWarnMessage(char *pMessage,...) {
va_list VaList;
// Print message "header"
printf("WARNING: ");
// Print message with variable parameters
va_start(VaList,pMessage);
vprintf(pMessage,VaList);
va_end(VaList);
}
/*
* PrintUsage:
* Print usage instructions (cmdline options etc..)
*
* Params:
* pProgramName: Program name (argv[0])
*
* Returns:
* n/a
*/
static void PrintUsage(char *pProgramName) {
printf("\nxmount v%s copyright (c) 2008-2010 by Gillen Daniel "
"<gillen.dan@pinguin.lu>\n",PACKAGE_VERSION);
printf("\nUsage:\n");
printf(" %s [[fopts] [mopts]] <ifile> [<ifile> [...]] <mntp>\n\n",pProgramName);
printf("Options:\n");
printf(" fopts:\n");
printf(" -d : Enable FUSE's and xmount's debug mode.\n");
printf(" -h : Display this help message.\n");
printf(" -s : Run single threaded.\n");
printf(" -o no_allow_other : Disable automatic addition of FUSE's allow_other option.\n");
printf(" -o <fmopts> : Specify fuse mount options. Will also disable automatic\n");
printf(" addition of FUSE's allow_other option!\n");
printf(" INFO: For VMDK emulation, you have to uncomment \"user_allow_other\" in\n");
printf(" /etc/fuse.conf or run xmount as root.\n");
printf(" mopts:\n");
printf(" --cache <file> : Enable virtual write support and set cachefile to use.\n");
// printf(" --debug : Enable xmount's debug mode.\n");
printf(" --in <itype> : Input image format. <itype> can be \"dd\"");
#ifdef WITH_LIBEWF
printf(", \"ewf\"");
#endif
#ifdef WITH_LIBAFF
printf(", \"aff\"");
#endif
printf(".\n");
printf(" --info : Print out some infos about used compiler and libraries.\n");
printf(" --out <otype> : Output image format. <otype> can be \"dd\", \"vdi\", \"vmdk(s)\".\n");
printf(" --owcache <file> : Same as --cache <file> but overwrites existing cache.\n");
printf(" --rw <file> : Same as --cache <file>.\n");
printf(" --version : Same as --info.\n");
printf(" INFO: Input and output image type defaults to \"dd\" if not specified.\n");
printf(" WARNING: Output image type \"vmdk(s)\" should be considered experimental!\n");
printf(" ifile:\n");
printf(" Input image file.");
#ifdef WITH_LIBEWF
printf(" If you use EWF files, you have to specify all image\n");
printf(" segments! (If your shell supports it, you can use .E?? as file extension\n");
printf(" to specify them all)\n");
#else
printf("\n");
#endif
printf(" mntp:\n");
printf(" Mount point where virtual files should be located.\n");
}
/*
* CheckFuseAllowOther:
* Check if FUSE allows us to pass the -o allow_other parameter.
* This only works if we are root or user_allow_other is set in
* /etc/fuse.conf.
*
* Params:
* n/a
*
* Returns:
* TRUE on success, FALSE on error
*/
static int CheckFuseAllowOther() {
if(geteuid()!=0) {
// Not running xmount as root. Try to read FUSE's config file /etc/fuse.conf
- FILE *hFuseConf=(FILE*)fopen64("/etc/fuse.conf","r");
+ FILE *hFuseConf=(FILE*)FOPEN("/etc/fuse.conf","r");
if(hFuseConf==NULL) {
LogWarnMessage("FUSE will not allow other users nor root to access your "
"virtual harddisk image. To change this behavior, please "
"add \"user_allow_other\" to /etc/fuse.conf or execute "
"xmount as root.\n");
return FALSE;
}
// Search conf file for set user_allow_others
char line[256];
int PermSet=FALSE;
while(fgets(line,sizeof(line),hFuseConf)!=NULL && PermSet!=TRUE) {
// TODO: This works as long as there is no other parameter beginning with
// "user_allow_other" :)
if(strncmp(line,"user_allow_other",strlen("user_allow_other"))==0) {
PermSet=TRUE;
}
}
fclose(hFuseConf);
if(PermSet==FALSE) {
LogWarnMessage("FUSE will not allow other users nor root to access your "
"virtual harddisk image. To change this behavior, please "
"add \"user_allow_other\" to /etc/fuse.conf or execute "
"xmount as root.\n");
return FALSE;
}
}
// Running xmount as root or user_allow_other is set in /etc/fuse.conf
return TRUE;
}
/*
* ParseCmdLine:
* Parse command line options
*
* Params:
* argc: Number of cmdline params
* argv: Array containing cmdline params
* pNargv: Number of FUSE options is written to this var
* pppNargv: FUSE options are written to this array
* pFilenameCount: Number of input image files is written to this var
* pppFilenames: Input image filenames are written to this array
* ppMountpoint: Mountpoint is written to this var
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int ParseCmdLine(const int argc,
char **argv,
int *pNargc,
char ***pppNargv,
int *pFilenameCount,
char ***pppFilenames,
char **ppMountpoint) {
int i=1,files=0,opts=0,AllowOther=TRUE;
// add argv[0] to pppNargv
opts++;
XMOUNT_MALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-1],argv[0])
// Parse options
while(i<argc && *argv[i]=='-') {
if(strlen(argv[i])>1 && *(argv[i]+1)!='-') {
// Options beginning with - are mostly FUSE specific
if(strcmp(argv[i],"-d")==0) {
// Enable FUSE's and xmount's debug mode
opts++;
XMOUNT_REALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-1],argv[i])
XMountConfData.Debug=TRUE;
} else if(strcmp(argv[i],"-h")==0) {
// Print help message
PrintUsage(argv[0]);
exit(1);
} else if(strcmp(argv[i],"-o")==0) {
// Next parameter specifies fuse mount options
if((argc+1)>i) {
i++;
// As the user specified the -o option, we assume he knows what he is
// doing. We won't append allow_other automatically. And we allow him
// to disable allow_other by passing a single "-o no_allow_other"
// which won't be passed to FUSE as it is xmount specific.
if(strcmp(argv[i],"no_allow_other")!=0) {
opts+=2;
XMOUNT_REALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-2],argv[i-1])
XMOUNT_STRSET((*pppNargv)[opts-1],argv[i])
}
AllowOther=FALSE;
} else {
LOG_ERROR("Couldn't parse mount options!\n")
PrintUsage(argv[0]);
exit(1);
}
} else if(strcmp(argv[i],"-s")==0) {
// Enable FUSE's single threaded mode
opts++;
XMOUNT_REALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-1],argv[i])
} else if(strcmp(argv[i],"-V")==0) {
// Display FUSE version info
opts++;
XMOUNT_REALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-1],argv[i])
} else {
LOG_ERROR("Unknown command line option \"%s\"\n",argv[i]);
PrintUsage(argv[0]);
exit(1);
}
} else {
// Options beginning with -- are xmount specific
if(strcmp(argv[i],"--cache")==0 || strcmp(argv[i],"--rw")==0) {
// Emulate writable access to mounted image
// Next parameter must be cache file to read/write changes from/to
if((argc+1)>i) {
i++;
XMOUNT_STRSET(XMountConfData.pCacheFile,argv[i])
XMountConfData.Writable=TRUE;
} else {
LOG_ERROR("You must specify a cache file to read/write data from/to!\n")
PrintUsage(argv[0]);
exit(1);
}
LOG_DEBUG("Enabling virtual write support using cache file \"%s\"\n",
XMountConfData.pCacheFile)
} else if(strcmp(argv[i],"--in")==0) {
// Specify input image type
// Next parameter must be image type
if((argc+1)>i) {
i++;
if(strcmp(argv[i],"dd")==0) {
XMountConfData.OrigImageType=TOrigImageType_DD;
LOG_DEBUG("Setting input image type to DD\n")
#ifdef WITH_LIBEWF
} else if(strcmp(argv[i],"ewf")==0) {
XMountConfData.OrigImageType=TOrigImageType_EWF;
LOG_DEBUG("Setting input image type to EWF\n")
#endif
#ifdef WITH_LIBAFF
} else if(strcmp(argv[i],"aff")==0) {
XMountConfData.OrigImageType=TOrigImageType_AFF;
LOG_DEBUG("Setting input image type to AFF\n")
#endif
} else {
LOG_ERROR("Unknown input image type \"%s\"!\n",argv[i])
PrintUsage(argv[0]);
exit(1);
}
} else {
LOG_ERROR("You must specify an input image type!\n");
PrintUsage(argv[0]);
exit(1);
}
} else if(strcmp(argv[i],"--out")==0) {
// Specify output image type
// Next parameter must be image type
if((argc+1)>i) {
i++;
if(strcmp(argv[i],"dd")==0) {
XMountConfData.VirtImageType=TVirtImageType_DD;
LOG_DEBUG("Setting virtual image type to DD\n")
} else if(strcmp(argv[i],"vdi")==0) {
XMountConfData.VirtImageType=TVirtImageType_VDI;
LOG_DEBUG("Setting virtual image type to VDI\n")
} else if(strcmp(argv[i],"vmdk")==0) {
XMountConfData.VirtImageType=TVirtImageType_VMDK;
LOG_DEBUG("Setting virtual image type to VMDK\n")
} else if(strcmp(argv[i],"vmdks")==0) {
XMountConfData.VirtImageType=TVirtImageType_VMDKS;
LOG_DEBUG("Setting virtual image type to VMDKS\n")
} else {
LOG_ERROR("Unknown output image type \"%s\"!\n",argv[i])
PrintUsage(argv[0]);
exit(1);
}
} else {
LOG_ERROR("You must specify an output image type!\n");
PrintUsage(argv[0]);
exit(1);
}
} else if(strcmp(argv[i],"--owcache")==0) {
// Enable writable access to mounted image and overwrite existing cache
// Next parameter must be cache file to read/write changes from/to
if((argc+1)>i) {
i++;
XMOUNT_STRSET(XMountConfData.pCacheFile,argv[i])
XMountConfData.Writable=TRUE;
XMountConfData.OverwriteCache=TRUE;
} else {
LOG_ERROR("You must specify a cache file to read/write data from/to!\n")
PrintUsage(argv[0]);
exit(1);
}
LOG_DEBUG("Enabling virtual write support overwriting cache file \"%s\"\n",
XMountConfData.pCacheFile)
} else if(strcmp(argv[i],"--version")==0 || strcmp(argv[i],"--info")==0) {
printf("xmount v%s copyright (c) 2008, 2009 by Gillen Daniel "
"<gillen.dan@pinguin.lu>\n\n",PACKAGE_VERSION);
#ifdef __GNUC__
printf(" compile timestamp: %s %s\n",__DATE__,__TIME__);
printf(" gcc version: %s\n",__VERSION__);
#endif
#ifdef WITH_LIBEWF
printf(" libewf support: YES (version %s)\n",LIBEWF_VERSION_STRING);
#else
printf(" libewf support: NO\n");
#endif
#ifdef WITH_LIBAFF
printf(" libaff support: YES (version %s)\n",af_version());
#else
printf(" libaaf support: NO\n");
#endif
printf("\n");
exit(0);
} else {
LOG_ERROR("Unknown command line option \"%s\"\n",argv[i]);
PrintUsage(argv[0]);
exit(1);
}
}
i++;
}
if(AllowOther==TRUE) {
// Try to add "-o allow_other" to FUSE's cmd-line params
if(CheckFuseAllowOther()==TRUE) {
opts+=2;
XMOUNT_REALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-2],"-o")
XMOUNT_STRSET((*pppNargv)[opts-1],"allow_other")
}
}
// Parse input image filename(s)
while(i<(argc-1)) {
files++;
XMOUNT_REALLOC(*pppFilenames,char**,files*sizeof(char*))
XMOUNT_STRSET((*pppFilenames)[files-1],argv[i])
i++;
}
if(files==0) {
LOG_ERROR("No input files specified!\n")
PrintUsage(argv[0]);
exit(1);
}
*pFilenameCount=files;
// Extract mountpoint
if(i==(argc-1)) {
XMOUNT_STRSET(*ppMountpoint,argv[argc-1])
opts++;
XMOUNT_REALLOC(*pppNargv,char**,opts*sizeof(char*))
XMOUNT_STRSET((*pppNargv)[opts-1],*ppMountpoint)
} else {
LOG_ERROR("No mountpoint specified!\n")
PrintUsage(argv[0]);
exit(1);
}
*pNargc=opts;
return TRUE;
}
/*
* ExtractVirtFileNames:
* Extract virtual file name from input image name
*
* Params:
* pOrigName: Name of input image (Can include a path)
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int ExtractVirtFileNames(char *pOrigName) {
char *tmp;
// Truncate any leading path
tmp=strrchr(pOrigName,'/');
if(tmp!=NULL) pOrigName=tmp+1;
// Extract file extension
tmp=strrchr(pOrigName,'.');
// Set leading '/'
XMOUNT_STRSET(XMountConfData.pVirtualImagePath,"/")
XMOUNT_STRSET(XMountConfData.pVirtualImageInfoPath,"/")
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
XMOUNT_STRSET(XMountConfData.pVirtualVmdkPath,"/")
}
// Copy filename
if(tmp==NULL) {
// Input image filename has no extension
XMOUNT_STRAPP(XMountConfData.pVirtualImagePath,pOrigName)
XMOUNT_STRAPP(XMountConfData.pVirtualImageInfoPath,pOrigName)
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
XMOUNT_STRAPP(XMountConfData.pVirtualVmdkPath,pOrigName)
}
XMOUNT_STRAPP(XMountConfData.pVirtualImageInfoPath,".info")
} else {
XMOUNT_STRNAPP(XMountConfData.pVirtualImagePath,pOrigName,
strlen(pOrigName)-strlen(tmp))
XMOUNT_STRNAPP(XMountConfData.pVirtualImageInfoPath,pOrigName,
strlen(pOrigName)-strlen(tmp))
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
XMOUNT_STRNAPP(XMountConfData.pVirtualVmdkPath,pOrigName,
strlen(pOrigName)-strlen(tmp))
}
XMOUNT_STRAPP(XMountConfData.pVirtualImageInfoPath,".info")
}
// Add virtual file extensions
switch(XMountConfData.VirtImageType) {
case TVirtImageType_DD:
XMOUNT_STRAPP(XMountConfData.pVirtualImagePath,".dd")
break;
case TVirtImageType_VDI:
XMOUNT_STRAPP(XMountConfData.pVirtualImagePath,".vdi")
break;
case TVirtImageType_VMDK:
case TVirtImageType_VMDKS:
XMOUNT_STRAPP(XMountConfData.pVirtualImagePath,".dd")
XMOUNT_STRAPP(XMountConfData.pVirtualVmdkPath,".vmdk")
break;
default:
LOG_ERROR("Unknown virtual image type!\n")
return FALSE;
}
LOG_DEBUG("Set virtual image name to \"%s\"\n",
XMountConfData.pVirtualImagePath)
LOG_DEBUG("Set virtual image info name to \"%s\"\n",
XMountConfData.pVirtualImageInfoPath)
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
LOG_DEBUG("Set virtual vmdk name to \"%s\"\n",
XMountConfData.pVirtualVmdkPath)
}
return TRUE;
}
/*
* GetOrigImageSize:
* Get size of original image
*
* Params:
* size: Pointer to an uint64_t to which the size will be written to
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int GetOrigImageSize(uint64_t *size) {
// Make sure to return correct values when dealing with only 32bit file sizes
*size=0;
// When size was already queryed, use old value rather than regetting value
// from disk
if(XMountConfData.OrigImageSize!=0) {
*size=XMountConfData.OrigImageSize;
return TRUE;
}
// Now get size of original image
switch(XMountConfData.OrigImageType) {
case TOrigImageType_DD:
// Original image is a DD file. Seek to end to get size.
if(fseeko(hDdFile,0,SEEK_END)!=0) {
LOG_ERROR("Couldn't seek to end of image file!\n")
return FALSE;
}
*size=ftello(hDdFile);
break;
#ifdef WITH_LIBEWF
case TOrigImageType_EWF:
// Original image is an EWF file. Just query media size.
if(libewf_get_media_size(hEwfFile,size)!=1) {
LOG_ERROR("Couldn't get ewf media size!\n")
return FALSE;
}
break;
#endif
#ifdef WITH_LIBAFF
case TOrigImageType_AFF:
// Original image is an AFF file.
*size=af_seek(hAffFile,0,SEEK_END);
break;
#endif
default:
LOG_ERROR("Unsupported image type!\n")
return FALSE;
}
// Save size so we have not to reget it from disk next time
XMountConfData.OrigImageSize=*size;
return TRUE;
}
/*
* GetVirtImageSize:
* Get size of the emulated image
*
* Params:
* size: Pointer to an uint64_t to which the size will be written to
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int GetVirtImageSize(uint64_t *size) {
if(XMountConfData.VirtImageSize!=0) {
*size=XMountConfData.VirtImageSize;
return TRUE;
}
switch(XMountConfData.VirtImageType) {
case TVirtImageType_VMDK:
case TVirtImageType_VMDKS:
case TVirtImageType_DD:
// Virtual image is a DD or VMDK file. Just return the size of the
// original image
if(!GetOrigImageSize(size)) {
LOG_ERROR("Couldn't get size of input image!\n")
return FALSE;
}
break;
case TVirtImageType_VDI:
// Virtual image is a VDI file. Get size of original image and add size
// of VDI header etc.
if(!GetOrigImageSize(size)) {
LOG_ERROR("Couldn't get size of input image!\n")
return FALSE;
}
(*size)+=(sizeof(TVdiFileHeader)+VdiBlockMapSize);
break;
default:
LOG_ERROR("Unsupported image type!\n")
return FALSE;
}
XMountConfData.VirtImageSize=*size;
return TRUE;
}
/*
* GetOrigImageData:
* Read data from original image
*
* Params:
* buf: Pointer to buffer to write read data to (Must be preallocated!)
* offset: Offset at which data should be read
* size: Size of data which should be read (Size of buffer)
*
* Returns:
* Number of read bytes on success or "-1" on error
*/
static int GetOrigImageData(char *buf, off_t offset, size_t size) {
size_t ToRead=0;
uint64_t ImageSize=0;
// Make sure we aren't reading past EOF of image file
if(!GetOrigImageSize(&ImageSize)) {
LOG_ERROR("Couldn't get image size!\n")
return -1;
}
if(offset>=ImageSize) {
// Offset is beyond image size
LOG_DEBUG("Offset is beyond image size.\n")
return 0;
}
if(offset+size>ImageSize) {
// Attempt to read data past EOF of image file
ToRead=ImageSize-offset;
LOG_DEBUG("Attempt to read data past EOF. Corrected size from %zd"
" to %zd.\n",size,ToRead)
} else ToRead=size;
// Now read data from image file
switch(XMountConfData.OrigImageType) {
case TOrigImageType_DD:
// Original image is a DD file. Seek to offset and read ToRead bytes.
// TODO: Perhaps check whether it is cheaper to seek from current position
// to offset than seeking from beginning of the file
if(fseeko(hDdFile,offset,SEEK_SET)!=0) {
LOG_ERROR("Couldn't seek to offset %" PRIu64 "!\n",offset)
return -1;
}
if(fread(buf,ToRead,1,hDdFile)!=1) {
LOG_ERROR("Couldn't read %zd bytes from offset %" PRIu64
"!\n",ToRead,offset)
return -1;
}
LOG_DEBUG("Read %zd bytes at offset %" PRIu64 " from DD file\n",
ToRead,offset)
break;
#ifdef WITH_LIBEWF
case TOrigImageType_EWF:
// Original image is an EWF file. Seek to offset and read ToRead bytes.
if(libewf_seek_offset(hEwfFile,offset)!=-1) {
if(libewf_read_buffer(hEwfFile,buf,ToRead)!=ToRead) {
LOG_ERROR("Couldn't read %zd bytes from offset %" PRIu64
"!\n",ToRead,offset)
return -1;
}
} else {
LOG_ERROR("Couldn't seek to offset %" PRIu64 "!\n",offset)
return -1;
}
LOG_DEBUG("Read %zd bytes at offset %" PRIu64 " from EWF file\n",
ToRead,offset)
break;
#endif
#ifdef WITH_LIBAFF
case TOrigImageType_AFF:
// Original image is an AFF file.
af_seek(hAffFile,offset,SEEK_SET);
if(af_read(hAffFile,buf,ToRead)!=ToRead) {
LOG_ERROR("Couldn't read %zd bytes from offset %" PRIu64
"!\n",ToRead,offset)
return -1;
}
LOG_DEBUG("Read %zd bytes at offset %" PRIu64 " from AFF file\n",
ToRead,offset)
break;
#endif
default:
LOG_ERROR("Unsupported image type!\n")
return -1;
}
return ToRead;
}
/*
* GetVirtVmdkData:
* Read data from virtual VMDK file
*
* Params:
* buf: Pointer to buffer to write read data to (Must be preallocated!)
* offset: Offset at which data should be read
* size: Size of data which should be read (Size of buffer)
*
* Returns:
* Number of read bytes on success or "-1" on error
*/
/*
static int GetVirtualVmdkData(char *buf, off_t offset, size_t size) {
uint32_t len;
len=strlen(pVirtualVmdkFile);
if(offset<len) {
if(offset+size>len) {
size=len-offset;
LOG_DEBUG("Attempt to read past EOF of virtual vmdk file\n")
}
if(XMountConfData.Writable==TRUE &&
pCacheFileHeader->VmdkFileCached==TRUE)
{
// VMDK file is cached. Read data from cache file
// TODO: Read data from cache file
} else {
// No write support or VMDK file not cached.
memcpy(buf,pVirtualVmdkFile+offset,size);
LOG_DEBUG("Read %" PRIu64 " bytes at offset %" PRIu64
" from virtual vmdk file\n",size,offset)
}
} else {
LOG_DEBUG("Attempt to read past EOF of virtual vmdk file\n");
return -1;
}
return size;
}
*/
/*
* GetVirtImageData:
* Read data from virtual image
*
* Params:
* buf: Pointer to buffer to write read data to (Must be preallocated!)
* offset: Offset at which data should be read
* size: Size of data which should be read (Size of buffer)
*
* Returns:
* Number of read bytes on success or "-1" on error
*/
static int GetVirtImageData(char *buf, off_t offset, size_t size) {
uint32_t CurBlock=0;
uint64_t VirtImageSize;
size_t ToRead=0;
size_t CurToRead=0;
off_t FileOff=offset;
off_t BlockOff=0;
// Get virtual image size
if(!GetVirtImageSize(&VirtImageSize)) {
LOG_ERROR("Couldn't get virtual image size!\n")
return -1;
}
if(offset>=VirtImageSize) {
LOG_ERROR("Attempt to read beyond virtual image EOF!\n")
return -1;
}
if(offset+size>VirtImageSize) {
LOG_DEBUG("Attempt to read pas EOF of virtual image file\n")
size=VirtImageSize-offset;
}
ToRead=size;
// Read virtual image type specific data
switch(XMountConfData.VirtImageType) {
case TVirtImageType_DD:
case TVirtImageType_VMDK:
case TVirtImageType_VMDKS:
break;
case TVirtImageType_VDI:
if(FileOff<VdiFileHeaderSize) {
if(FileOff+ToRead>VdiFileHeaderSize) CurToRead=VdiFileHeaderSize-FileOff;
else CurToRead=ToRead;
if(XMountConfData.Writable==TRUE &&
pCacheFileHeader->VdiFileHeaderCached==TRUE)
{
// VDI header was already cached
if(fseeko(hCacheFile,
pCacheFileHeader->pVdiFileHeader+FileOff,
SEEK_SET)!=0)
{
LOG_ERROR("Couldn't seek to cached VDI header at offset %"
PRIu64 "\n",pCacheFileHeader->pVdiFileHeader+FileOff)
return 0;
}
if(fread(buf,CurToRead,1,hCacheFile)!=1) {
LOG_ERROR("Couldn't read %zu bytes from cache file at offset %"
PRIu64 "\n",CurToRead,
pCacheFileHeader->pVdiFileHeader+FileOff)
return 0;
}
LOG_DEBUG("Read %zd bytes from cached VDI header at offset %"
PRIu64 " at cache file offset %" PRIu64 "\n",
CurToRead,FileOff,
pCacheFileHeader->pVdiFileHeader+FileOff)
} else {
// VDI header isn't cached
memcpy(buf,((char*)pVdiFileHeader)+FileOff,CurToRead);
LOG_DEBUG("Read %zd bytes at offset %" PRIu64
" from virtual VDI header\n",CurToRead,
FileOff)
}
if(ToRead==CurToRead) return ToRead;
else {
// Adjust values to read from original image
ToRead-=CurToRead;
buf+=CurToRead;
FileOff=0;
}
} else FileOff-=VdiFileHeaderSize;
break;
}
// Calculate block to read data from
CurBlock=FileOff/CACHE_BLOCK_SIZE;
BlockOff=FileOff%CACHE_BLOCK_SIZE;
// Read image data
while(ToRead!=0) {
// Calculate how many bytes we have to read from this block
if(BlockOff+ToRead>CACHE_BLOCK_SIZE) {
CurToRead=CACHE_BLOCK_SIZE-BlockOff;
} else CurToRead=ToRead;
if(XMountConfData.Writable==TRUE &&
pCacheFileBlockIndex[CurBlock].Assigned==TRUE)
{
// Write support enabled and need to read altered data from cachefile
if(fseeko(hCacheFile,
pCacheFileBlockIndex[CurBlock].off_data+BlockOff,
SEEK_SET)!=0)
{
LOG_ERROR("Couldn't seek to offset %" PRIu64
" in cache file\n")
return -1;
}
if(fread(buf,CurToRead,1,hCacheFile)!=1) {
LOG_ERROR("Couldn't read data from cache file!\n")
return -1;
}
LOG_DEBUG("Read %zd bytes at offset %" PRIu64
" from cache file\n",CurToRead,FileOff)
} else {
// No write support or data not cached
if(GetOrigImageData(buf,
FileOff,
CurToRead)!=CurToRead)
{
LOG_ERROR("Couldn't read data from input image!\n")
return -1;
}
LOG_DEBUG("Read %zd bytes at offset %" PRIu64
" from original image file\n",CurToRead,
FileOff)
}
CurBlock++;
BlockOff=0;
buf+=CurToRead;
ToRead-=CurToRead;
FileOff+=CurToRead;
}
return size;
}
/*
* SetVdiFileHeaderData:
* Write data to virtual VDI file header
*
* Params:
* buf: Buffer containing data to write
* offset: Offset of changes
* size: Amount of bytes to write
*
* Returns:
* Number of written bytes on success or "-1" on error
*/
static int SetVdiFileHeaderData(char *buf,off_t offset,size_t size) {
if(offset+size>VdiFileHeaderSize) size=VdiFileHeaderSize-offset;
LOG_DEBUG("Need to cache %zu bytes at offset %" PRIu64
" from VDI header\n",size,offset)
if(pCacheFileHeader->VdiFileHeaderCached==1) {
// Header was already cached
if(fseeko(hCacheFile,
pCacheFileHeader->pVdiFileHeader+offset,
SEEK_SET)!=0)
{
LOG_ERROR("Couldn't seek to cached VDI header at address %"
PRIu64 "\n",pCacheFileHeader->pVdiFileHeader+offset)
return -1;
}
if(fwrite(buf,size,1,hCacheFile)!=1) {
LOG_ERROR("Couldn't write %zu bytes to cache file at offset %"
PRIu64 "\n",size,
pCacheFileHeader->pVdiFileHeader+offset)
return -1;
}
LOG_DEBUG("Wrote %zd bytes at offset %" PRIu64 " to cache file\n",
size,pCacheFileHeader->pVdiFileHeader+offset)
} else {
// Header wasn't already cached.
if(fseeko(hCacheFile,
0,
SEEK_END)!=0)
{
LOG_ERROR("Couldn't seek to end of cache file!")
return -1;
}
pCacheFileHeader->pVdiFileHeader=ftello(hCacheFile);
LOG_DEBUG("Caching whole VDI header\n")
if(offset>0) {
// Changes do not begin at offset 0, need to prepend with data from
// VDI header
if(fwrite((char*)pVdiFileHeader,offset,1,hCacheFile)!=1) {
LOG_ERROR("Error while writing %" PRIu64 " bytes "
"to cache file at offset %" PRIu64 "!\n",
offset,
pCacheFileHeader->pVdiFileHeader);
return -1;
}
LOG_DEBUG("Prepended changed data with %" PRIu64
" bytes at cache file offset %" PRIu64 "\n",
offset,pCacheFileHeader->pVdiFileHeader)
}
// Cache changed data
if(fwrite(buf,size,1,hCacheFile)!=1) {
LOG_ERROR("Couldn't write %zu bytes to cache file at offset %"
PRIu64 "\n",size,
pCacheFileHeader->pVdiFileHeader+offset)
return -1;
}
LOG_DEBUG("Wrote %zu bytes of changed data to cache file offset %"
PRIu64 "\n",size,
pCacheFileHeader->pVdiFileHeader+offset)
if(offset+size!=VdiFileHeaderSize) {
// Need to append data from VDI header to cache whole data struct
if(fwrite(((char*)pVdiFileHeader)+offset+size,
VdiFileHeaderSize-(offset+size),
1,
hCacheFile)!=1)
{
LOG_ERROR("Couldn't write %zu bytes to cache file at offset %"
PRIu64 "\n",VdiFileHeaderSize-(offset+size),
(uint64_t)(pCacheFileHeader->pVdiFileHeader+offset+size))
return -1;
}
LOG_DEBUG("Appended %" PRIu32
" bytes to changed data at cache file offset %"
PRIu64 "\n",VdiFileHeaderSize-(offset+size),
pCacheFileHeader->pVdiFileHeader+offset+size)
}
// Mark header as cached and update header in cache file
pCacheFileHeader->VdiFileHeaderCached=1;
if(fseeko(hCacheFile,0,SEEK_SET)!=0) {
LOG_ERROR("Couldn't seek to offset 0 of cache file!\n")
return -1;
}
if(fwrite((char*)pCacheFileHeader,sizeof(TCacheFileHeader),1,hCacheFile)!=1) {
LOG_ERROR("Couldn't write changed cache file header!\n")
return -1;
}
}
// All important data has been written, now flush all buffers to make
// sure data is written to cache file
fflush(hCacheFile);
+#ifndef __APPLE__
ioctl(fileno(hCacheFile),BLKFLSBUF,0);
+#endif
return size;
}
/*
* SetVirtImageData:
* Write data to virtual image
*
* Params:
* buf: Buffer containing data to write
* offset: Offset to start writing at
* size: Size of data to be written
*
* Returns:
* Number of written bytes on success or "-1" on error
*/
static int SetVirtImageData(const char *buf, off_t offset, size_t size) {
uint64_t CurBlock=0;
uint64_t VirtImageSize;
uint64_t OrigImageSize;
size_t ToWrite=0;
size_t CurToWrite=0;
off_t FileOff=offset;
off_t BlockOff=0;
char *WriteBuf=(char*)buf;
char *buf2;
ssize_t ret;
// Get virtual image size
if(!GetVirtImageSize(&VirtImageSize)) {
LOG_ERROR("Couldn't get virtual image size!\n")
return -1;
}
if(offset>=VirtImageSize) {
LOG_ERROR("Attempt to write beyond EOF of virtual image file!\n")
return -1;
}
if(offset+size>VirtImageSize) {
LOG_DEBUG("Attempt to write past EOF of virtual image file\n")
size=VirtImageSize-offset;
}
ToWrite=size;
// Cache virtual image type specific data
if(XMountConfData.VirtImageType==TVirtImageType_VDI) {
if(FileOff<VdiFileHeaderSize) {
ret=SetVdiFileHeaderData(WriteBuf,FileOff,ToWrite);
if(ret==-1) {
LOG_ERROR("Couldn't write data to virtual VDI file header!\n")
return -1;
}
if(ret==ToWrite) return ToWrite;
else {
ToWrite-=ret;
WriteBuf+=ret;
FileOff=0;
}
} else FileOff-=VdiFileHeaderSize;
}
// Get original image size
if(!GetOrigImageSize(&OrigImageSize)) {
LOG_ERROR("Couldn't get original image size!\n")
return -1;
}
// Calculate block to write data to
CurBlock=FileOff/CACHE_BLOCK_SIZE;
BlockOff=FileOff%CACHE_BLOCK_SIZE;
while(ToWrite!=0) {
// Calculate how many bytes we have to write to this block
if(BlockOff+ToWrite>CACHE_BLOCK_SIZE) {
CurToWrite=CACHE_BLOCK_SIZE-BlockOff;
} else CurToWrite=ToWrite;
if(pCacheFileBlockIndex[CurBlock].Assigned==1) {
// Block was already cached
// Seek to data offset in cache file
if(fseeko(hCacheFile,
pCacheFileBlockIndex[CurBlock].off_data+BlockOff,
SEEK_SET)!=0)
{
LOG_ERROR("Couldn't seek to cached block at address %" PRIu64 "\n",
pCacheFileBlockIndex[CurBlock].off_data+BlockOff)
return -1;
}
if(fwrite(WriteBuf,CurToWrite,1,hCacheFile)!=1) {
LOG_ERROR("Error while writing %zu bytes "
"to cache file at offset %" PRIu64 "!\n",
CurToWrite,
pCacheFileBlockIndex[CurBlock].off_data+BlockOff);
return -1;
}
LOG_DEBUG("Wrote %zd bytes at offset %" PRIu64
" to cache file\n",CurToWrite,
pCacheFileBlockIndex[CurBlock].off_data+BlockOff)
} else {
// Uncached block. Need to cache entire new block
// Seek to end of cache file to append new cache block
fseeko(hCacheFile,0,SEEK_END);
pCacheFileBlockIndex[CurBlock].off_data=ftello(hCacheFile);
if(BlockOff!=0) {
// Changed data does not begin at block boundry. Need to prepend
// with data from virtual image file
XMOUNT_MALLOC(buf2,char*,BlockOff*sizeof(char))
if(GetOrigImageData(buf2,FileOff-BlockOff,BlockOff)!=BlockOff) {
LOG_ERROR("Couldn't read data from original image file!\n")
return -1;
}
if(fwrite(buf2,BlockOff,1,hCacheFile)!=1) {
LOG_ERROR("Couldn't writing %" PRIu64 " bytes "
"to cache file at offset %" PRIu64 "!\n",
BlockOff,
pCacheFileBlockIndex[CurBlock].off_data);
return -1;
}
LOG_DEBUG("Prepended changed data with %" PRIu64
" bytes from virtual image file at offset %" PRIu64
"\n",BlockOff,FileOff-BlockOff)
free(buf2);
}
if(fwrite(WriteBuf,CurToWrite,1,hCacheFile)!=1) {
LOG_ERROR("Error while writing %zd bytes "
"to cache file at offset %" PRIu64 "!\n",
CurToWrite,
pCacheFileBlockIndex[CurBlock].off_data+BlockOff);
return -1;
}
if(BlockOff+CurToWrite!=CACHE_BLOCK_SIZE) {
// Changed data does not end at block boundry. Need to append
// with data from virtual image file
XMOUNT_MALLOC(buf2,char*,(CACHE_BLOCK_SIZE-
(BlockOff+CurToWrite))*sizeof(char))
memset(buf2,0,CACHE_BLOCK_SIZE-(BlockOff+CurToWrite));
if((FileOff-BlockOff)+CACHE_BLOCK_SIZE>OrigImageSize) {
// Original image is smaller than full cache block
if(GetOrigImageData(buf2,
FileOff+CurToWrite,
OrigImageSize-(FileOff+CurToWrite))!=
OrigImageSize-(FileOff+CurToWrite))
{
LOG_ERROR("Couldn't read data from virtual image file!\n")
return -1;
}
} else {
if(GetOrigImageData(buf2,
FileOff+CurToWrite,
CACHE_BLOCK_SIZE-(BlockOff+CurToWrite))!=
CACHE_BLOCK_SIZE-(BlockOff+CurToWrite))
{
LOG_ERROR("Couldn't read data from virtual image file!\n")
return -1;
}
}
if(fwrite(buf2,
CACHE_BLOCK_SIZE-(BlockOff+CurToWrite),
1,
hCacheFile)!=1)
{
LOG_ERROR("Error while writing %zd bytes "
"to cache file at offset %" PRIu64 "!\n",
CACHE_BLOCK_SIZE-(BlockOff+CurToWrite),
pCacheFileBlockIndex[CurBlock].off_data+BlockOff+CurToWrite);
return -1;
}
free(buf2);
}
// All important data for this cache block has been written,
// flush all buffers and mark cache block as assigned
fflush(hCacheFile);
+#ifndef __APPLE__
ioctl(fileno(hCacheFile),BLKFLSBUF,0);
+#endif
pCacheFileBlockIndex[CurBlock].Assigned=1;
// Update cache block index entry in cache file
fseeko(hCacheFile,
sizeof(TCacheFileHeader)+(CurBlock*sizeof(TCacheFileBlockIndex)),
SEEK_SET);
if(fwrite(&(pCacheFileBlockIndex[CurBlock]),
sizeof(TCacheFileBlockIndex),
1,
hCacheFile)!=1)
{
LOG_ERROR("Couldn't update cache file block index!\n");
return -1;
}
LOG_DEBUG("Updated cache file block index: Number=%" PRIu64
", Data offset=%" PRIu64 "\n",CurBlock,
pCacheFileBlockIndex[CurBlock].off_data);
}
// Flush buffers
fflush(hCacheFile);
+#ifndef __APPLE__
ioctl(fileno(hCacheFile),BLKFLSBUF,0);
+#endif
BlockOff=0;
CurBlock++;
WriteBuf+=CurToWrite;
ToWrite-=CurToWrite;
FileOff+=CurToWrite;
}
return size;
}
/*
* GetVirtFileAccess:
* FUSE access implementation
*
* Params:
* path: Path of file to get attributes from
* perm: Requested permissisons
*
* Returns:
* "0" on success, negated error code on error
*/
/*
static int GetVirtFileAccess(const char *path, int perm) {
// TODO: Implement propper file permission handling
// http://www.cs.cf.ac.uk/Dave/C/node20.html
// Values for the second argument to access.
// These may be OR'd together.
//#define R_OK 4 // Test for read permission.
//#define W_OK 2 // Test for write permission.
//#define X_OK 1 // Test for execute permission.
//#define F_OK 0 // Test for existence.
return 0;
}
*/
/*
* GetVirtFileAttr:
* FUSE getattr implementation
*
* Params:
* path: Path of file to get attributes from
* stbuf: Pointer to stat structure to save attributes to
*
* Returns:
* "0" on success, negated error code on error
*/
static int GetVirtFileAttr(const char *path, struct stat *stbuf) {
memset(stbuf,0,sizeof(struct stat));
if(strcmp(path,"/")==0) {
// Attributes of mountpoint
stbuf->st_mode=S_IFDIR | 0777;
stbuf->st_nlink=2;
} else if(strcmp(path,XMountConfData.pVirtualImagePath)==0) {
// Attributes of virtual image
if(!XMountConfData.Writable) stbuf->st_mode=S_IFREG | 0444;
else stbuf->st_mode=S_IFREG | 0666;
stbuf->st_nlink=1;
// Get virtual image file size
if(!GetVirtImageSize(&(stbuf->st_size))) {
LOG_ERROR("Couldn't get image size!\n");
return -ENOENT;
}
} else if(strcmp(path,XMountConfData.pVirtualImageInfoPath)==0) {
// Attributes of virtual image info file
stbuf->st_mode=S_IFREG | 0444;
stbuf->st_nlink=1;
// Get virtual image info file size
if(pVirtualImageInfoFile!=NULL) {
stbuf->st_size=strlen(pVirtualImageInfoFile);
} else stbuf->st_size=0;
} else if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
// Some special files only present when emulating VMDK files
if(strcmp(path,XMountConfData.pVirtualVmdkPath)==0) {
// Attributes of virtual vmdk file
if(!XMountConfData.Writable) stbuf->st_mode=S_IFREG | 0444;
else stbuf->st_mode=S_IFREG | 0666;
stbuf->st_nlink=1;
// Get virtual image info file size
if(pVirtualVmdkFile!=NULL) {
stbuf->st_size=VirtualVmdkFileSize;
} else stbuf->st_size=0;
} else if(pVirtualVmdkLockDir!=NULL &&
strcmp(path,pVirtualVmdkLockDir)==0)
{
stbuf->st_mode=S_IFDIR | 0777;
stbuf->st_nlink=2;
} else if(pVirtualVmdkLockDir2!=NULL &&
strcmp(path,pVirtualVmdkLockDir2)==0)
{
stbuf->st_mode=S_IFDIR | 0777;
stbuf->st_nlink=2;
} else if(pVirtualVmdkLockFileName!=NULL &&
strcmp(path,pVirtualVmdkLockFileName)==0)
{
stbuf->st_mode=S_IFREG | 0666;
if(pVirtualVmdkLockFileName!=NULL) {
stbuf->st_size=strlen(pVirtualVmdkLockFileName);
} else stbuf->st_size=0;
} else return -ENOENT;
} else return -ENOENT;
// Set uid and gid of all files to uid and gid of current process
stbuf->st_uid=getuid();
stbuf->st_gid=getgid();
return 0;
}
/*
* CreateVirtDir:
* FUSE mkdir implementation
*
* Params:
* path: Directory path
* mode: Directory permissions
*
* Returns:
* "0" on success, negated error code on error
*/
static int CreateVirtDir(const char *path, mode_t mode) {
// Only allow creation of VMWare's lock directories
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
if(pVirtualVmdkLockDir==NULL) {
char aVmdkLockDir[strlen(XMountConfData.pVirtualVmdkPath)+5];
sprintf(aVmdkLockDir,"%s.lck",XMountConfData.pVirtualVmdkPath);
if(strcmp(path,aVmdkLockDir)==0) {
LOG_DEBUG("Creating virtual directory \"%s\"\n",aVmdkLockDir)
XMOUNT_STRSET(pVirtualVmdkLockDir,aVmdkLockDir)
return 0;
} else {
LOG_ERROR("Attempt to create illegal directory \"%s\"!\n",path)
LOG_DEBUG("Supposed: %s\n",aVmdkLockDir)
return -1;
}
} else if(pVirtualVmdkLockDir2==NULL &&
strncmp(path,pVirtualVmdkLockDir,strlen(pVirtualVmdkLockDir))==0)
{
LOG_DEBUG("Creating virtual directory \"%s\"\n",path)
XMOUNT_STRSET(pVirtualVmdkLockDir2,path)
return 0;
} else {
LOG_ERROR("Attempt to create illegal directory \"%s\"!\n",path)
LOG_DEBUG("Compared to first %u chars of \"%s\"\n",strlen(pVirtualVmdkLockDir),pVirtualVmdkLockDir)
return -1;
}
}
LOG_ERROR("Attempt to create directory \"%s\" "
"on read-only filesystem!\n",path)
return -1;
}
/*
* CreateVirtFile:
* FUSE create implementation.
* Only allows to create VMWare's lock file!
*
* Params:
* path: File to create
* mode: File mode
* dev: ??? but not used
*
* Returns:
* "0" on success, negated error code on error
*/
static int CreateVirtFile(const char *path,
mode_t mode,
dev_t dev)
{
if((XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS) &&
pVirtualVmdkLockDir!=NULL && pVirtualVmdkLockFileName==NULL)
{
LOG_DEBUG("Creating virtual file \"%s\"\n",path)
XMOUNT_STRSET(pVirtualVmdkLockFileName,path);
return 0;
} else {
LOG_ERROR("Attempt to create illegal file \"%s\"\n",path)
return -1;
}
}
/*
* GetVirtFiles:
* FUSE readdir implementation
*
* Params:
* path: Path from where files should be listed
* buf: Buffer to write file entrys to
* filler: Function to write file entrys to buffer
* offset: ??? but not used
* fi: ??? but not used
*
* Returns:
* "0" on success, negated error code on error
*/
static int GetVirtFiles(const char *path,
void *buf,
fuse_fill_dir_t filler,
off_t offset,
struct fuse_file_info *fi)
{
(void)offset;
(void)fi;
if(strcmp(path,"/")==0) {
// Add std . and .. entrys
filler(buf,".",NULL,0);
filler(buf,"..",NULL,0);
// Add our virtual files (p+1 to ignore starting "/")
filler(buf,XMountConfData.pVirtualImagePath+1,NULL,0);
filler(buf,XMountConfData.pVirtualImageInfoPath+1,NULL,0);
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
// For VMDK's, we use an additional descriptor file
filler(buf,XMountConfData.pVirtualVmdkPath+1,NULL,0);
// And there could also be a lock directory
if(pVirtualVmdkLockDir!=NULL) {
filler(buf,pVirtualVmdkLockDir+1,NULL,0);
}
}
} else if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
// For VMDK emulation, there could be a lock directory
if(pVirtualVmdkLockDir!=NULL && strcmp(path,pVirtualVmdkLockDir)==0) {
filler(buf,".",NULL,0);
filler(buf,"..",NULL,0);
if(pVirtualVmdkLockFileName!=NULL) {
filler(buf,pVirtualVmdkLockFileName+strlen(pVirtualVmdkLockDir)+1,NULL,0);
}
} else if(pVirtualVmdkLockDir2!=NULL &&
strcmp(path,pVirtualVmdkLockDir2)==0)
{
filler(buf,".",NULL,0);
filler(buf,"..",NULL,0);
} else return -ENOENT;
} else return -ENOENT;
return 0;
}
/*
* OpenVirtFile:
* FUSE open implementation
*
* Params:
* path: Path to file to open
* fi: ??? but not used
*
* Returns:
* "0" on success, negated error code on error
*/
static int OpenVirtFile(const char *path, struct fuse_file_info *fi) {
if(strcmp(path,XMountConfData.pVirtualImagePath)==0 ||
strcmp(path,XMountConfData.pVirtualImageInfoPath)==0)
{
// Check open permissions
if(!XMountConfData.Writable && (fi->flags & 3)!=O_RDONLY) {
// Attempt to open a read-only file for writing
LOG_DEBUG("Attempt to open the read-only file \"%s\" for writing.\n",path)
return -EACCES;
}
return 0;
} else if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
if(strcmp(path,XMountConfData.pVirtualVmdkPath)==0) {
// Check open permissions
if(!XMountConfData.Writable && (fi->flags & 3)!=O_RDONLY) {
// Attempt to open a read-only file for writing
LOG_DEBUG("Attempt to open the read-only file \"%s\" for writing.\n",path)
return -EACCES;
}
return 0;
} else if(pVirtualVmdkLockFileName!=NULL &&
strcmp(path,pVirtualVmdkLockFileName)==0)
{
// Check open permissions
if(!XMountConfData.Writable && (fi->flags & 3)!=O_RDONLY) {
// Attempt to open a read-only file for writing
LOG_DEBUG("Attempt to open the read-only file \"%s\" for writing.\n",path)
return -EACCES;
}
return 0;
} else {
// Attempt to open a non existant file
LOG_DEBUG("Attempt to open non existant file \"%s\".\n",path)
return -ENOENT;
}
} else {
// Attempt to open a non existant file
LOG_DEBUG("Attempt to open non existant file \"%s\".\n",path)
return -ENOENT;
}
}
/*
* ReadVirtFile:
* FUSE read implementation
*
* Params:
* buf: Buffer where read data is written to
* size: Number of bytes to read
* offset: Offset to start reading at
* fi: ?? but not used
*
* Returns:
* Read bytes on success, negated error code on error
*/
static int ReadVirtFile(const char *path,
char *buf,
size_t size,
off_t offset,
struct fuse_file_info *fi)
{
uint64_t len;
if(strcmp(path,XMountConfData.pVirtualImagePath)==0) {
// Wait for other threads to end reading/writing data
pthread_mutex_lock(&mutex_image_rw);
// Get virtual image file size
if(!GetVirtImageSize(&len)) {
LOG_ERROR("Couldn't get virtual image size!\n")
pthread_mutex_unlock(&mutex_image_rw);
return 0;
}
if(offset<len) {
if(offset+size>len) size=len-offset;
if(GetVirtImageData(buf,offset,size)!=size) {
LOG_ERROR("Couldn't read data from virtual image file!\n")
pthread_mutex_unlock(&mutex_image_rw);
return 0;
}
} else {
LOG_DEBUG("Attempt to read past EOF of virtual image file\n");
pthread_mutex_unlock(&mutex_image_rw);
return 0;
}
// Allow other threads to read/write data again
pthread_mutex_unlock(&mutex_image_rw);
} else if(strcmp(path,XMountConfData.pVirtualImageInfoPath)==0) {
// Read data from virtual image info file
len=strlen(pVirtualImageInfoFile);
if(offset<len) {
if(offset+size>len) {
size=len-offset;
LOG_DEBUG("Attempt to read past EOF of virtual image info file\n")
}
pthread_mutex_lock(&mutex_info_read);
memcpy(buf,pVirtualImageInfoFile+offset,size);
pthread_mutex_unlock(&mutex_info_read);
LOG_DEBUG("Read %" PRIu64 " bytes at offset %" PRIu64
" from virtual image info file\n",size,offset)
} else {
LOG_DEBUG("Attempt to read past EOF of virtual info file\n");
return 0;
}
} else if(strcmp(path,XMountConfData.pVirtualVmdkPath)==0) {
// Read data from virtual vmdk file
len=VirtualVmdkFileSize;
if(offset<len) {
if(offset+size>len) {
LOG_DEBUG("Attempt to read past EOF of virtual vmdk file\n")
LOG_DEBUG("Adjusting read size from %u to %u\n",size,len-offset)
size=len-offset;
}
pthread_mutex_lock(&mutex_image_rw);
memcpy(buf,pVirtualVmdkFile+offset,size);
pthread_mutex_unlock(&mutex_image_rw);
LOG_DEBUG("Read %" PRIu64 " bytes at offset %" PRIu64
" from virtual vmdk file\n",size,offset)
} else {
LOG_DEBUG("Attempt to read behind EOF of virtual vmdk file\n");
return 0;
}
} else if(pVirtualVmdkLockFileName!=NULL &&
strcmp(path,pVirtualVmdkLockFileName)==0)
{
// Read data from virtual lock file
len=VirtualVmdkLockFileDataSize;
if(offset<len) {
if(offset+size>len) {
LOG_DEBUG("Attempt to read past EOF of virtual vmdk lock file\n")
LOG_DEBUG("Adjusting read size from %u to %u\n",size,len-offset)
size=len-offset;
}
pthread_mutex_lock(&mutex_image_rw);
memcpy(buf,pVirtualVmdkLockFileData+offset,size);
pthread_mutex_unlock(&mutex_image_rw);
LOG_DEBUG("Read %" PRIu64 " bytes at offset %" PRIu64
" from virtual vmdk lock file\n",size,offset)
} else {
LOG_DEBUG("Attempt to read past EOF of virtual vmdk lock file\n");
return 0;
}
} else {
// Attempt to read non existant file
LOG_DEBUG("Attempt to read from non existant file \"%s\"\n",path)
return -ENOENT;
}
return size;
}
/*
* RenameVirtFile:
* FUSE rename implementation
*
* Params:
* path: File to rename
* npath: New filename
*
* Returns:
* "0" on error, negated error code on error
*/
static int RenameVirtFile(const char *path, const char *npath) {
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
if(pVirtualVmdkLockFileName!=NULL &&
strcmp(path,pVirtualVmdkLockFileName)==0)
{
LOG_DEBUG("Renaming virtual lock file from \"%s\" to \"%s\"\n",
pVirtualVmdkLockFileName,
npath)
XMOUNT_REALLOC(pVirtualVmdkLockFileName,char*,
(strlen(npath)+1)*sizeof(char));
strcpy(pVirtualVmdkLockFileName,npath);
return 0;
}
}
return -ENOENT;
}
/*
* DeleteVirtDir:
* FUSE rmdir implementation
*
* Params:
* path: Directory to delete
*
* Returns:
* "0" on success, negated error code on error
*/
static int DeleteVirtDir(const char *path) {
// Only VMWare's lock directories can be deleted
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
if(pVirtualVmdkLockDir!=NULL && strcmp(path,pVirtualVmdkLockDir)==0) {
LOG_DEBUG("Deleting virtual lock dir \"%s\"\n",pVirtualVmdkLockDir)
free(pVirtualVmdkLockDir);
pVirtualVmdkLockDir=NULL;
return 0;
} else if(pVirtualVmdkLockDir2!=NULL &&
strcmp(path,pVirtualVmdkLockDir2)==0)
{
LOG_DEBUG("Deleting virtual lock dir \"%s\"\n",pVirtualVmdkLockDir)
free(pVirtualVmdkLockDir2);
pVirtualVmdkLockDir2=NULL;
return 0;
}
}
return -1;
}
/*
* DeleteVirtFile:
* FUSE unlink implementation
*
* Params:
* path: File to delete
*
* Returns:
* "0" on success, negated error code on error
*/
static int DeleteVirtFile(const char *path) {
// Only VMWare's lock file can be deleted
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
if(pVirtualVmdkLockFileName!=NULL &&
strcmp(path,pVirtualVmdkLockFileName)==0)
{
LOG_DEBUG("Deleting virtual file \"%s\"\n",pVirtualVmdkLockFileName)
free(pVirtualVmdkLockFileName);
free(pVirtualVmdkLockFileData);
pVirtualVmdkLockFileName=NULL;
pVirtualVmdkLockFileData=NULL;
VirtualVmdkLockFileDataSize=0;
return 0;
}
}
return -1;
}
/*
* GetVirtFsStats:
* FUSE statfs implementation
*
* Params:
* path: Get stats for fs that the specified file resides in
* stats: Stats
*
* Returns:
* "0" on success, negated error code on error
*/
/*
static int GetVirtFsStats(const char *path, struct statvfs *stats) {
struct statvfs CacheFileFsStats;
int ret;
if(XMountConfData.Writable==TRUE) {
// If write support is enabled, return stats of fs upon which cache file
// resides in
if((ret=statvfs(XMountConfData.pCacheFile,&CacheFileFsStats))==0) {
memcpy(stats,&CacheFileFsStats,sizeof(struct statvfs));
return 0;
} else {
LOG_ERROR("Couldn't get stats for fs upon which resides \"%s\"\n",
XMountConfData.pCacheFile)
return ret;
}
} else {
// TODO: Return read only
return 0;
}
}
*/
/*
* WriteVirtFile:
* FUSE write implementation
*
* Params:
* buf: Buffer containing data to write
* size: Number of bytes to write
* offset: Offset to start writing at
* fi: ?? but not used
*
* Returns:
* Written bytes on success, negated error code on error
*/
static int WriteVirtFile(const char *path,
const char *buf,
size_t size,
off_t offset,
struct fuse_file_info *fi)
{
uint64_t len;
if(strcmp(path,XMountConfData.pVirtualImagePath)==0) {
// Wait for other threads to end reading/writing data
pthread_mutex_lock(&mutex_image_rw);
// Get virtual image file size
if(!GetVirtImageSize(&len)) {
LOG_ERROR("Couldn't get virtual image size!\n")
pthread_mutex_unlock(&mutex_image_rw);
return 0;
}
if(offset<len) {
if(offset+size>len) size=len-offset;
if(SetVirtImageData(buf,offset,size)!=size) {
LOG_ERROR("Couldn't write data to virtual image file!\n")
pthread_mutex_unlock(&mutex_image_rw);
return 0;
}
} else {
LOG_DEBUG("Attempt to write past EOF of virtual image file\n")
pthread_mutex_unlock(&mutex_image_rw);
return 0;
}
// Allow other threads to read/write data again
pthread_mutex_unlock(&mutex_image_rw);
} else if(strcmp(path,XMountConfData.pVirtualVmdkPath)==0) {
pthread_mutex_lock(&mutex_image_rw);
len=VirtualVmdkFileSize;
if((offset+size)>len) {
// Enlarge or create buffer if needed
if(len==0) {
len=offset+size;
XMOUNT_MALLOC(pVirtualVmdkFile,char*,len*sizeof(char))
} else {
len=offset+size;
XMOUNT_REALLOC(pVirtualVmdkFile,char*,len*sizeof(char))
}
VirtualVmdkFileSize=offset+size;
}
// Copy data to buffer
memcpy(pVirtualVmdkFile+offset,buf,size);
pthread_mutex_unlock(&mutex_image_rw);
} else if(pVirtualVmdkLockFileName!=NULL &&
strcmp(path,pVirtualVmdkLockFileName)==0)
{
pthread_mutex_lock(&mutex_image_rw);
if((offset+size)>VirtualVmdkLockFileDataSize) {
// Enlarge or create buffer if needed
if(VirtualVmdkLockFileDataSize==0) {
VirtualVmdkLockFileDataSize=offset+size;
XMOUNT_MALLOC(pVirtualVmdkLockFileData,char*,
VirtualVmdkLockFileDataSize*sizeof(char))
} else {
VirtualVmdkLockFileDataSize=offset+size;
XMOUNT_REALLOC(pVirtualVmdkLockFileData,char*,
VirtualVmdkLockFileDataSize*sizeof(char))
}
}
// Copy data to buffer
memcpy(pVirtualVmdkLockFileData+offset,buf,size);
pthread_mutex_unlock(&mutex_image_rw);
} else if(strcmp(path,XMountConfData.pVirtualImageInfoPath)==0) {
// Attempt to write data to read only image info file
LOG_DEBUG("Attempt to write data to virtual info file\n");
return -ENOENT;
} else {
// Attempt to write to non existant file
LOG_DEBUG("Attempt to write to the non existant file \"%s\"\n",path)
return -ENOENT;
}
return size;
}
/*
* CalculateInputImageHash:
* Calculates an MD5 hash of the first HASH_AMOUNT bytes of the input image.
*
* Params:
* pHashLow : Pointer to the lower 64 bit of the hash
* pHashHigh : Pointer to the higher 64 bit of the hash
*
* Returns:
* TRUE on success, FALSE on error
*/
static int CalculateInputImageHash(uint64_t *pHashLow, uint64_t *pHashHigh) {
char hash[16];
md5_state_t md5_state;
char *buf;
XMOUNT_MALLOC(buf,char*,HASH_AMOUNT*sizeof(char))
size_t read_data=GetOrigImageData(buf,0,HASH_AMOUNT);
if(read_data>0) {
// Calculate MD5 hash
md5_init(&md5_state);
md5_append(&md5_state,buf,HASH_AMOUNT);
md5_finish(&md5_state,hash);
// Convert MD5 hash into two 64bit integers
*pHashLow=*((uint64_t*)hash);
*pHashHigh=*((uint64_t*)(hash+8));
free(buf);
return TRUE;
} else {
LOG_ERROR("Couldn't read data from original image file!\n")
free(buf);
return FALSE;
}
}
/*
* InitVirtVdiHeader:
* Build and init virtual VDI file header
*
* Params:
* n/a
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int InitVirtVdiHeader() {
// See http://forums.virtualbox.org/viewtopic.php?t=8046 for a
// "description" of the various header fields
uint64_t ImageSize;
off_t offset;
uint32_t i,BlockEntries;
// Get input image size
if(!GetOrigImageSize(&ImageSize)) {
LOG_ERROR("Couldn't get input image size!\n")
return FALSE;
}
// Calculate how many VDI blocks we need
BlockEntries=ImageSize/VDI_IMAGE_BLOCK_SIZE;
if((ImageSize%VDI_IMAGE_BLOCK_SIZE)!=0) BlockEntries++;
VdiBlockMapSize=BlockEntries*sizeof(uint32_t);
LOG_DEBUG("BlockMap: %d (%08X) entries, %d (%08X) bytes!\n",
BlockEntries,
BlockEntries,
VdiBlockMapSize,
VdiBlockMapSize)
// Allocate memory for vdi header and block map
VdiFileHeaderSize=sizeof(TVdiFileHeader)+VdiBlockMapSize;
XMOUNT_MALLOC(pVdiFileHeader,pTVdiFileHeader,VdiFileHeaderSize)
memset(pVdiFileHeader,0,VdiFileHeaderSize);
pVdiBlockMap=((void*)pVdiFileHeader)+sizeof(TVdiFileHeader);
// Init header values
strncpy(pVdiFileHeader->szFileInfo,VDI_FILE_COMMENT,
strlen(VDI_FILE_COMMENT)+1);
pVdiFileHeader->u32Signature=VDI_IMAGE_SIGNATURE;
pVdiFileHeader->u32Version=VDI_IMAGE_VERSION;
pVdiFileHeader->cbHeader=0x00000180; // No idea what this is for! Testimage had same value
pVdiFileHeader->u32Type=VDI_IMAGE_TYPE_FIXED;
pVdiFileHeader->fFlags=VDI_IMAGE_FLAGS;
strncpy(pVdiFileHeader->szComment,VDI_HEADER_COMMENT,
strlen(VDI_HEADER_COMMENT)+1);
pVdiFileHeader->offData=VdiFileHeaderSize;
pVdiFileHeader->offBlocks=sizeof(TVdiFileHeader);
pVdiFileHeader->cCylinders=0; // Legacy info
pVdiFileHeader->cHeads=0; // Legacy info
pVdiFileHeader->cSectors=0; // Legacy info
pVdiFileHeader->cbSector=512; // Legacy info
pVdiFileHeader->u32Dummy=0;
pVdiFileHeader->cbDisk=ImageSize;
// Seems as VBox is always using a 1MB blocksize
pVdiFileHeader->cbBlock=VDI_IMAGE_BLOCK_SIZE;
pVdiFileHeader->cbBlockExtra=0;
pVdiFileHeader->cBlocks=BlockEntries;
pVdiFileHeader->cBlocksAllocated=BlockEntries;
// Use partial MD5 input file hash as creation UUID and generate a random
// modification UUID. VBox won't accept immages where create and modify UUIDS
// aren't set.
pVdiFileHeader->uuidCreate_l=XMountConfData.InputHashLo;
pVdiFileHeader->uuidCreate_h=XMountConfData.InputHashHi;
//*((uint32_t*)(&(pVdiFileHeader->uuidCreate_l)))=rand();
//*((uint32_t*)(&(pVdiFileHeader->uuidCreate_l))+4)=rand();
//*((uint32_t*)(&(pVdiFileHeader->uuidCreate_h)))=rand();
//*((uint32_t*)(&(pVdiFileHeader->uuidCreate_h))+4)=rand();
#define rand64(var) { \
*((uint32_t*)&(var))=rand(); \
*(((uint32_t*)&(var))+1)=rand(); \
}
rand64(pVdiFileHeader->uuidModify_l);
rand64(pVdiFileHeader->uuidModify_h);
#undef rand64
// Generate block map
i=0;
for(offset=0;offset<VdiBlockMapSize;offset+=4) {
*((uint32_t*)(pVdiBlockMap+offset))=i;
i++;
}
LOG_DEBUG("VDI header size = %u\n",VdiFileHeaderSize)
return TRUE;
}
/*
* InitVirtualVmdkFile:
* Init the virtual VMDK file
*
* Params:
* n/a
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int InitVirtualVmdkFile() {
uint64_t ImageSize=0;
uint64_t ImageBlocks=0;
char buf[500];
// Get original image size
if(!GetOrigImageSize(&ImageSize)) {
LOG_ERROR("Couldn't get original image size!\n")
return FALSE;
}
ImageBlocks=ImageSize/512;
if(ImageSize%512!=0) ImageBlocks++;
#define VMDK_DESC_FILE "# Disk DescriptorFile\n" \
"version=1\n" \
"CID=fffffffe\n" \
"parentCID=ffffffff\n" \
"createType=\"monolithicFlat\"\n\n" \
"# Extent description\n" \
"RW %" PRIu64 " FLAT \"%s\" 0\n\n" \
"# The Disk Data Base\n" \
"#DDB\n" \
"ddb.virtualHWVersion = \"3\"\n" \
"ddb.adapterType = \"%s\"\n" \
"ddb.geometry.cylinders = \"0\"\n" \
"ddb.geometry.heads = \"0\"\n" \
"ddb.geometry.sectors = \"0\"\n"
if(XMountConfData.VirtImageType==TVirtImageType_VMDK) {
// VMDK with IDE bus
sprintf(buf,
VMDK_DESC_FILE,
ImageBlocks,
(XMountConfData.pVirtualImagePath)+1,
"ide");
} else if(XMountConfData.VirtImageType==TVirtImageType_VMDKS){
// VMDK with SCSI bus
sprintf(buf,
VMDK_DESC_FILE,
ImageBlocks,
(XMountConfData.pVirtualImagePath)+1,
"scsi");
} else {
LOG_ERROR("Unknown virtual VMDK file format!\n")
return FALSE;
}
#undef VMDK_DESC_FILE
// Do not use XMOUNT_STRSET here to avoid adding '\0' to the buffer!
XMOUNT_MALLOC(pVirtualVmdkFile,char*,strlen(buf))
strncpy(pVirtualVmdkFile,buf,strlen(buf));
VirtualVmdkFileSize=strlen(buf);
return TRUE;
}
/*
* InitVirtImageInfoFile:
* Create virtual image info file
*
* Params:
* n/a
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int InitVirtImageInfoFile() {
char buf[200];
int ret;
// Add static header to file
XMOUNT_MALLOC(pVirtualImageInfoFile,char*,(strlen(IMAGE_INFO_HEADER)+1))
strncpy(pVirtualImageInfoFile,IMAGE_INFO_HEADER,strlen(IMAGE_INFO_HEADER)+1);
switch(XMountConfData.OrigImageType) {
case TOrigImageType_DD:
// Original image is a DD file. There isn't much info to extract. Perhaps
// just add image size
// TODO: Add infos to virtual image info file
break;
#ifdef WITH_LIBEWF
#define M_SAVE_VALUE(DESC) { \
if(ret==1) { \
XMOUNT_REALLOC(pVirtualImageInfoFile,char*, \
(strlen(pVirtualImageInfoFile)+strlen(buf)+strlen(DESC)+2)) \
strncpy((pVirtualImageInfoFile+strlen(pVirtualImageInfoFile)),DESC,strlen(DESC)+1); \
strncpy((pVirtualImageInfoFile+strlen(pVirtualImageInfoFile)),buf,strlen(buf)+1); \
strncpy((pVirtualImageInfoFile+strlen(pVirtualImageInfoFile)),"\n",2); \
} else if(ret==-1) { \
LOG_ERROR("Couldn't query EWF image info!\n") \
return FALSE; \
} \
}
case TOrigImageType_EWF:
// Original image is an EWF file. Extract various infos from ewf file and
// add them to the virtual image info file content.
ret=libewf_get_header_value_case_number(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Case number: ")
ret=libewf_get_header_value_description(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Description: ")
ret=libewf_get_header_value_examiner_name(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Examiner: ")
ret=libewf_get_header_value_evidence_number(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Evidence number: ")
ret=libewf_get_header_value_notes(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Notes: ")
ret=libewf_get_header_value_acquiry_date(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Acquiry date: ")
ret=libewf_get_header_value_system_date(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("System date: ")
ret=libewf_get_header_value_acquiry_operating_system(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Acquiry os: ")
ret=libewf_get_header_value_acquiry_software_version(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("Acquiry sw version: ")
ret=libewf_get_hash_value_md5(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("MD5 hash: ")
ret=libewf_get_hash_value_sha1(hEwfFile,buf,sizeof(buf));
M_SAVE_VALUE("SHA1 hash: ")
break;
#undef M_SAVE_VALUE
#endif
#ifdef WITH_LIBAFF
case TOrigImageType_AFF:
// Original image is an AFF file.
// TODO: Extract some infos from AFF file to add to our info file
break;
#endif
default:
LOG_ERROR("Unsupported input image type!\n")
return FALSE;
}
return TRUE;
}
/*
* InitCacheFile:
* Create / load cache file to enable virtual write support
*
* Params:
* n/a
*
* Returns:
* "TRUE" on success, "FALSE" on error
*/
static int InitCacheFile() {
uint64_t ImageSize=0;
uint64_t BlockIndexSize=0;
uint64_t CacheFileHeaderSize=0;
uint64_t CacheFileSize=0;
uint32_t NeededBlocks=0;
uint64_t buf;
if(!XMountConfData.OverwriteCache) {
// Try to open an existing cache file or create a new one
- hCacheFile=(FILE*)fopen64(XMountConfData.pCacheFile,"rb+");
+ hCacheFile=(FILE*)FOPEN(XMountConfData.pCacheFile,"rb+");
if(hCacheFile==NULL) {
// As the c lib seems to have no possibility to open a file rw wether it
// exists or not (w+ does not work because it truncates an existing file),
// when r+ returns NULL the file could simply not exist
LOG_DEBUG("Cache file does not exist. Creating new one\n")
- hCacheFile=(FILE*)fopen64(XMountConfData.pCacheFile,"wb+");
+ hCacheFile=(FILE*)FOPEN(XMountConfData.pCacheFile,"wb+");
if(hCacheFile==NULL) {
// There is really a problem opening the file
LOG_ERROR("Couldn't open cache file \"%s\"!\n",
XMountConfData.pCacheFile)
return FALSE;
}
}
} else {
// Overwrite existing cache file or create a new one
- hCacheFile=(FILE*)fopen64(XMountConfData.pCacheFile,"wb+");
+ hCacheFile=(FILE*)FOPEN(XMountConfData.pCacheFile,"wb+");
if(hCacheFile==NULL) {
LOG_ERROR("Couldn't open cache file \"%s\"!\n",
XMountConfData.pCacheFile)
return FALSE;
}
}
// Get input image size
if(!GetOrigImageSize(&ImageSize)) {
LOG_ERROR("Couldn't get input image size!\n")
return FALSE;
}
// Calculate how many blocks are needed and how big the buffers must be
// for the actual cache file version
NeededBlocks=ImageSize/CACHE_BLOCK_SIZE;
if((ImageSize%CACHE_BLOCK_SIZE)!=0) NeededBlocks++;
BlockIndexSize=NeededBlocks*sizeof(TCacheFileBlockIndex);
CacheFileHeaderSize=sizeof(TCacheFileHeader)+BlockIndexSize;
LOG_DEBUG("Cache blocks: %u (%04X) entries, %zd (%08zX) bytes\n",
NeededBlocks,
NeededBlocks,
BlockIndexSize,
BlockIndexSize)
// Get cache file size
// fseeko64 had massive problems!
if(fseeko(hCacheFile,0,SEEK_END)!=0) {
LOG_ERROR("Couldn't seek to end of cache file!\n")
return FALSE;
}
// Same here, ftello64 didn't work at all and returned 0 all the times
CacheFileSize=ftello(hCacheFile);
LOG_DEBUG("Cache file has %zd bytes\n",CacheFileSize)
if(CacheFileSize>0) {
// Cache file isn't empty, parse block header
LOG_DEBUG("Cache file not empty. Parsing block header\n")
if(fseeko(hCacheFile,0,SEEK_SET)!=0) {
LOG_ERROR("Couldn't seek to beginning of cache file!\n")
return FALSE;
}
// Read and check file signature
if(fread(&buf,8,1,hCacheFile)!=1 || buf!=CACHE_FILE_SIGNATURE) {
free(pCacheFileHeader);
LOG_ERROR("Not an xmount cache file or cache file corrupt!\n")
return FALSE;
}
// Now get cache file version (Has only 32bit!)
if(fread(&buf,4,1,hCacheFile)!=1) {
free(pCacheFileHeader);
LOG_ERROR("Not an xmount cache file or cache file corrupt!\n")
return FALSE;
}
switch((uint32_t)buf) {
case 0x00000001:
// Old v1 cache file.
LOG_ERROR("Unsupported cache file version!\n")
LOG_ERROR("Please use xmount-tool to upgrade your cache file.\n")
return FALSE;
case CUR_CACHE_FILE_VERSION:
// Current version
if(fseeko(hCacheFile,0,SEEK_SET)!=0) {
LOG_ERROR("Couldn't seek to beginning of cache file!\n")
return FALSE;
}
// Alloc memory for header and block index
XMOUNT_MALLOC(pCacheFileHeader,pTCacheFileHeader,CacheFileHeaderSize)
memset(pCacheFileHeader,0,CacheFileHeaderSize);
// Read header and block index from file
if(fread(pCacheFileHeader,CacheFileHeaderSize,1,hCacheFile)!=1) {
// Cache file isn't big enough
free(pCacheFileHeader);
LOG_ERROR("Cache file corrupt!\n")
return FALSE;
}
break;
default:
LOG_ERROR("Unknown cache file version!\n")
return FALSE;
}
// Check if cache file has same block size as we do
if(pCacheFileHeader->BlockSize!=CACHE_BLOCK_SIZE) {
LOG_ERROR("Cache file does not use default cache block size!\n")
return FALSE;
}
// Set pointer to block index
pCacheFileBlockIndex=(pTCacheFileBlockIndex)((void*)pCacheFileHeader+
pCacheFileHeader->pBlockIndex);
} else {
// New cache file, generate a new block header
LOG_DEBUG("Cache file is empty. Generating new block header\n");
// Alloc memory for header and block index
XMOUNT_MALLOC(pCacheFileHeader,pTCacheFileHeader,CacheFileHeaderSize)
memset(pCacheFileHeader,0,CacheFileHeaderSize);
pCacheFileHeader->FileSignature=CACHE_FILE_SIGNATURE;
pCacheFileHeader->CacheFileVersion=CUR_CACHE_FILE_VERSION;
pCacheFileHeader->BlockSize=CACHE_BLOCK_SIZE;
pCacheFileHeader->BlockCount=NeededBlocks;
//pCacheFileHeader->UsedBlocks=0;
// The following pointer is only usuable when reading data from cache file
pCacheFileHeader->pBlockIndex=sizeof(TCacheFileHeader);
pCacheFileBlockIndex=(pTCacheFileBlockIndex)((void*)pCacheFileHeader+
sizeof(TCacheFileHeader));
pCacheFileHeader->VdiFileHeaderCached=FALSE;
pCacheFileHeader->pVdiFileHeader=0;
pCacheFileHeader->VmdkFileCached=FALSE;
pCacheFileHeader->VmdkFileSize=0;
pCacheFileHeader->pVmdkFile=0;
// Write header to file
if(fwrite(pCacheFileHeader,CacheFileHeaderSize,1,hCacheFile)!=1) {
free(pCacheFileHeader);
LOG_ERROR("Couldn't write cache file header to file!\n");
return FALSE;
}
}
return TRUE;
}
/*
* Struct containing implemented FUSE functions
*/
static struct fuse_operations xmount_operations = {
// .access=GetVirtFileAccess,
.getattr=GetVirtFileAttr,
.mkdir=CreateVirtDir,
.mknod=CreateVirtFile,
.open=OpenVirtFile,
.readdir=GetVirtFiles,
.read=ReadVirtFile,
.rename=RenameVirtFile,
.rmdir=DeleteVirtDir,
// .statfs=GetVirtFsStats,
.unlink=DeleteVirtFile,
.write=WriteVirtFile
// .release=mountewf_release,
};
/*
* Main
*/
int main(int argc, char *argv[])
{
char **ppInputFilenames=NULL;
int InputFilenameCount=0;
int nargc=0;
char **ppNargv=NULL;
char *pMountpoint=NULL;
int ret=1;
int i=0;
setbuf(stdout,NULL);
setbuf(stderr,NULL);
// Init XMountConfData
XMountConfData.OrigImageType=TOrigImageType_DD;
XMountConfData.VirtImageType=TVirtImageType_DD;
XMountConfData.Debug=FALSE;
XMountConfData.pVirtualImagePath=NULL;
XMountConfData.pVirtualVmdkPath=NULL;
XMountConfData.pVirtualImageInfoPath=NULL;
XMountConfData.Writable=FALSE;
XMountConfData.OverwriteCache=FALSE;
XMountConfData.pCacheFile=NULL;
XMountConfData.OrigImageSize=0;
XMountConfData.VirtImageSize=0;
XMountConfData.InputHashLo=0;
XMountConfData.InputHashHi=0;
// Parse command line options
if(!ParseCmdLine(argc,
argv,
&nargc,
&ppNargv,
&InputFilenameCount,
&ppInputFilenames,
&pMountpoint))
{
LOG_ERROR("Error parsing command line options!\n")
//PrintUsage(argv[0]);
return 1;
}
// Check command line options
if(nargc<2 /*|| InputFilenameCount==0 || pMountpoint==NULL*/) {
LOG_ERROR("Couldn't parse command line options!\n")
PrintUsage(argv[0]);
return 1;
}
if(XMountConfData.Debug==TRUE) {
LOG_DEBUG("Options passed to FUSE: ")
for(i=0;i<nargc;i++) { printf("%s ",ppNargv[i]); }
printf("\n");
}
#ifdef WITH_LIBEWF
// Check for valid ewf files
if(XMountConfData.OrigImageType==TOrigImageType_EWF) {
for(i=0;i<InputFilenameCount;i++) {
if(libewf_check_file_signature(ppInputFilenames[i])!=1) {
LOG_ERROR("File \"%s\" isn't a valid ewf file!\n",ppInputFilenames[i])
return 1;
}
}
}
#endif
// TODO: Check if mountpoint is a valid dir
// Init mutexes
pthread_mutex_init(&mutex_image_rw,NULL);
pthread_mutex_init(&mutex_info_read,NULL);
if(InputFilenameCount==1) {
LOG_DEBUG("Loading image file \"%s\"...\n",
ppInputFilenames[0])
} else {
LOG_DEBUG("Loading image files \"%s .. %s\"...\n",
ppInputFilenames[0],
ppInputFilenames[InputFilenameCount-1])
}
// Init random generator
srand(time(NULL));
// Open input image
switch(XMountConfData.OrigImageType) {
case TOrigImageType_DD:
// Input image is a DD file
- hDdFile=(FILE*)fopen64(ppInputFilenames[0],"rb");
+ hDdFile=(FILE*)FOPEN(ppInputFilenames[0],"rb");
if(hDdFile==NULL) {
LOG_ERROR("Couldn't open DD file \"%s\"\n",ppInputFilenames[0])
return 1;
}
break;
#ifdef WITH_LIBEWF
case TOrigImageType_EWF:
// Input image is an EWF file or glob
hEwfFile=libewf_open(ppInputFilenames,
InputFilenameCount,
libewf_get_flags_read());
if(hEwfFile==NULL) {
LOG_ERROR("Couldn't open EWF file(s)!\n")
return 1;
}
// Parse EWF header
if(libewf_parse_header_values(hEwfFile,LIBEWF_DATE_FORMAT_ISO8601)!=1) {
LOG_ERROR("Couldn't parse ewf header values!\n")
return 1;
}
break;
#endif
#ifdef WITH_LIBAFF
case TOrigImageType_AFF:
// Input image is an AFF file
hAffFile=af_open(ppInputFilenames[0],O_RDONLY,0);
if(!hAffFile) {
LOG_ERROR("Couldn't open AFF file!\n")
return 1;
}
if(af_cannot_decrypt(hAffFile)) {
LOG_ERROR("Encrypted AFF input images aren't supported yet!\n")
return 1;
}
break;
#endif
default:
LOG_ERROR("Unsupported input image type specified!\n")
return 1;
}
LOG_DEBUG("Input image file opened successfully\n")
// Calculate partial MD5 hash of input image file
if(CalculateInputImageHash(&(XMountConfData.InputHashLo),
&(XMountConfData.InputHashHi))==FALSE)
{
LOG_ERROR("Couldn't calculate partial hash of input image file!\n")
return 1;
}
if(XMountConfData.Debug==TRUE) {
LOG_DEBUG("Partial MD5 hash of input image file: ")
for(i=0;i<8;i++) printf("%02hhx",
*(((char*)(&(XMountConfData.InputHashLo)))+i));
for(i=0;i<8;i++) printf("%02hhx",
*(((char*)(&(XMountConfData.InputHashHi)))+i));
printf("\n");
}
if(!ExtractVirtFileNames(ppInputFilenames[0])) {
LOG_ERROR("Couldn't extract virtual file names!\n");
return 1;
}
LOG_DEBUG("Virtual file names extracted successfully\n")
// Gather infos for info file
if(!InitVirtImageInfoFile()) {
LOG_ERROR("Couldn't gather infos for virtual image info file!\n")
return 1;
}
LOG_DEBUG("Virtual image info file build successfully\n")
// Do some virtual image type specific initialisations
switch(XMountConfData.VirtImageType) {
case TVirtImageType_DD:
break;
case TVirtImageType_VDI:
// When mounting as VDI, we need to construct a vdi header
if(!InitVirtVdiHeader()) {
LOG_ERROR("Couldn't initialize virtual VDI file header!\n")
return 1;
}
LOG_DEBUG("Virtual VDI file header build successfully\n")
break;
case TVirtImageType_VMDK:
case TVirtImageType_VMDKS:
// When mounting as VMDK, we need to construct the VMDK descriptor file
if(!InitVirtualVmdkFile()) {
LOG_ERROR("Couldn't initilaize virtual VMDK file!\n")
return 1;
}
break;
}
if(XMountConfData.Writable) {
// Init cache file and cache file block index
if(!InitCacheFile()) {
LOG_ERROR("Couldn't initilaize cache file!\n")
return 1;
}
LOG_DEBUG("Cache file initialized successfully\n")
}
// Call fuse_main to do the fuse magic
ret=fuse_main(nargc,ppNargv,&xmount_operations,NULL);
// Destroy mutexes
pthread_mutex_destroy(&mutex_image_rw);
pthread_mutex_destroy(&mutex_info_read);
// Close input image
switch(XMountConfData.OrigImageType) {
case TOrigImageType_DD:
fclose(hDdFile);
break;
#ifdef WITH_LIBEWF
case TOrigImageType_EWF:
libewf_close(hEwfFile);
break;
#endif
#ifdef WITH_LIBAFF
case TOrigImageType_AFF:
af_close(hAffFile);
break;
#endif
default:
LOG_ERROR("Couldn't close unsupported input image type!\n");
}
if(XMountConfData.Writable) {
// Write support was enabled, close cache file
fclose(hCacheFile);
free(pCacheFileHeader);
}
// Free allocated memory
if(XMountConfData.VirtImageType==TVirtImageType_VDI) {
// Free constructed VDI header
free(pVdiFileHeader);
}
if(XMountConfData.VirtImageType==TVirtImageType_VMDK ||
XMountConfData.VirtImageType==TVirtImageType_VMDKS)
{
// Free constructed VMDK file
free(pVirtualVmdkFile);
free(XMountConfData.pVirtualVmdkPath);
if(pVirtualVmdkLockFileName!=NULL) free(pVirtualVmdkLockFileName);
if(pVirtualVmdkLockFileData!=NULL) free(pVirtualVmdkLockFileData);
if(pVirtualVmdkLockDir!=NULL) free(pVirtualVmdkLockDir);
if(pVirtualVmdkLockDir2!=NULL) free(pVirtualVmdkLockDir2);
}
for(i=0;i<InputFilenameCount;i++) free(ppInputFilenames[i]);
free(ppInputFilenames);
for(i=0;i<nargc;i++) free(ppNargv[i]);
free(ppNargv);
free(XMountConfData.pVirtualImagePath);
free(XMountConfData.pVirtualImageInfoPath);
free(XMountConfData.pCacheFile);
return ret;
}
/*
----- Change history -----
20090131: v0.1.0 released
* Some minor things have still to be done.
* Mounting ewf as dd: Seems to work. Diff didn't complain about
changes between original dd and emulated dd.
* Mounting ewf as vdi: Seems to work too. VBox accepts the emulated
vdi as valid vdi file and I was able to mount the containing fs
under Debian. INFO: Debian freezed when not using mount -r !!
20090203: v0.1.1 released
* Multiple code improvements. For ex. cleaner vdi header allocation.
* Fixed severe bug in image block calculation. Didn't check for odd
input in conversion from bytes to megabytes.
* Added more debug output
20090210: v0.1.2 released
* Fixed compilation problem (Typo in image_init_info() function).
* Fixed some problems with the debian scripts to be able to build
packages.
* Added random generator initialisation (Makes it possible to use
more than one image in VBox at a time).
20090215: * Added function init_cache_blocks which creates / loads a cache
file used to implement virtual write capability.
20090217: * Implemented the fuse write function. Did already some basic tests
with dd and it seems to work. But there are certainly still some
bugs left as there are also still some TODO's left.
20090226: * Changed program name from mountewf to xmount.
* Began with massive code cleanups to ease full implementation of
virtual write support and to be able to support multiple input
image formats (DD, EWF and AFF are planned for now).
* Added defines for supported input formats so it should be possible
to compile xmount without supporting all input formats. (DD
input images are always supported as these do not require any
additional libs). Input formats should later be en/disabled
by the configure script in function to which libs it detects.
* GetOrigImageSize function added to get the size of the original
image whatever type it is in.
* GetOrigImageData function added to retrieve data from original
image file whatever type it is in.
* GetVirtImageSize function added to get the size of the virtual
image file.
* Cleaned function mountewf_getattr and renamed it to
GetVirtFileAttr
* Cleaned function mountewf_readdir and renamed it to GetVirtFiles
* Cleaned function mountewf_open and renamed it to OpenVirtFile
20090227: * Cleaned function init_info_file and renamed it to
InitVirtImageInfoFile
20090228: * Cleaned function init_cache_blocks and renamed it to
InitCacheFile
* Added LogMessage function to ease error and debug logging (See
also LOG_ERROR and LOG_DEBUG macros in xmount.h)
* Cleaned function init_vdi_header and renamed it to
InitVirtVdiHeader
* Added PrintUsage function to print out xmount usage informations
* Cleaned function parse_cmdline and renamed it to ParseCmdLine
* Cleaned function main
* Added ExtractVirtFileNames function to extract virtual file names
from input image name
* Added function GetVirtImageData to retrieve data from the virtual
image file. This includes reading data from cache file if virtual
write support is enabled.
* Added function ReadVirtFile to replace mountewf_read
20090229: * Fixed a typo in virtual file name creation
* Added function SetVirtImageData to write data to virtual image
file. This includes writing data to cache file and caching entire
new blocks
* Added function WriteVirtFile to replace mountewf_write
20090305: * Solved a problem that made it impossible to access offsets >32bit
20090308: * Added SetVdiFileHeaderData function to handle virtual image type
specific data to be cached. This makes cache files independent
from virtual image type
20090316: v0.2.0 released
20090327: v0.2.1 released
* Fixed a bug in virtual write support. Checking whether data is
cached didn't use semaphores. This could corrupt cache files
when running multi-threaded.
* Added IsVdiFileHeaderCached function to check whether VDI file
header was already cached
* Added IsBlockCached function to check whether a block was already
cached
20090331: v0.2.2 released (Internal release)
* Further changes to semaphores to fix write support bug.
20090410: v0.2.3 released
* Reverted most of the fixes from v0.2.1 and v0.2.2 as those did not
solve the write support bug.
* Removed all semaphores
* Added two pthread mutexes to protect virtual image and virtual
info file.
20090508: * Configure script will now exit when needed libraries aren't found
* Added support for newest libewf beta version 20090506 as it seems
to reduce memory usage when working with EWF files by about 1/2.
* Added LIBEWF_BETA define to adept source to new libewf API.
* Added function InitVirtualVmdkFile to build a VmWare virtual disk
descriptor file.
20090519: * Added function CreateVirtDir implementing FUSE's mkdir to allow
VMWare to create his <iname>.vmdk.lck lock folder. Function does
not allow to create other folders!
* Changed cache file handling as VMDK caching will need new cache
file structure incompatible to the old one.
20090522: v0.3.0 released
* Added function DeleteVirtFile and DeleteVirtDir so VMWare can
remove his lock directories and files.
* Added function RenameVirtFile because VMWare needs to rename his
lock files.
* VMDK support should work now but descriptor file won't get cached
as I didn't implement it yet.
20090604: * Added --cache commandline parameter doing the same as --rw.
* Added --owcache commandline parameter doing the same as --rw but
overwrites any existing cache data. This can be handy for
debugging and testing purposes.
* Added "vmdks" output type. Same as "vmdk" but generates a disk
connected to the SCSI bus rather than the IDE bus.
20090710: v0.3.1 released
20090721: * Added function CheckFuseAllowOther to check wether FUSE supports
the "-o allow_other" option. It is supported when
"user_allow_other" is set in /etc/fuse.conf or when running
xmount as root.
* Automatic addition of FUSE's "-o allow_other" option if it is
supported.
* Added special "-o no_allow_other" command line parameter to
disable automatic addition of the above option.
* Reorganisation of FUSE's and xmount's command line options
processing.
* Added LogWarnMessage function to output a warning message.
20090722: * Added function CalculateInputImageHash to calculate an MD5 hash
of the first input image's HASH_AMOUNT bytes of data. This hash is
used as VDI creation UUID and will later be used to match cache
files to input images.
20090724: v0.3.2 released
20090725: v0.4.0 released
* Added AFF input image support.
* Due to various problems with libewf and libaff packages (Mainly
in Debian and Ubuntu), I decided to include them into xmount's
source tree and link them in statically. This has the advantage
that I can use whatever version I want.
20090727: v0.4.1 released
* Added again the ability to compile xmount with shared libs as the
Debian folks don't like the static ones :)
20090812: * Added TXMountConfData.OrigImageSize and
TXMountConfData.VirtImageSize to save the size of the input and
output image in order to avoid regetting it always from disk.
20090814: * Replaced all malloc and realloc occurences with the two macros
XMOUNT_MALLOC and XMOUNT_REALLOC.
20090816: * Replaced where applicable all occurences of str(n)cpy or
alike with their corresponding macros XMOUNT_STRSET, XMOUNT_STRCPY
and XMOUNT_STRNCPY pendants.
20090907: v0.4.2 released
* Fixed a bug in VMDK lock file access. VirtualVmdkLockFileDataSize
wasn't reset to 0 when the file was deleted.
* Fixed a bug in VMDK descriptor file access. Had to add
VirtualVmdkFileSize to track the size of this file as strlen was
a bad idea :).
20100324: v0.4.3 released
* Changed all header structs to prevent different sizes on i386 and
amd64. See xmount.h for more details.
20100810: v0.4.4 released
* Found a bug in InitVirtVdiHeader(). The 64bit values were
addressed incorrectly while filled with rand(). This leads to an
error message when trying to add a VDI file to VirtualBox 3.2.8.
*/
diff --git a/tags/xmount-0.4.4/xmount.h b/tags/xmount-0.4.4/xmount.h
index 23ea8c7..51724d0 100755
--- a/tags/xmount-0.4.4/xmount.h
+++ b/tags/xmount-0.4.4/xmount.h
@@ -1,322 +1,329 @@
/*******************************************************************************
* xmount Copyright (c) 2008,2009 by Gillen Daniel <gillen.dan@pinguin.lu> *
* *
* xmount is a small tool to "fuse mount" various image formats as dd or vdi *
* files and enable virtual write access. *
* *
* This program is free software: you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the Free *
* Software Foundation, either version 3 of the License, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for *
* more details. *
* *
* You should have received a copy of the GNU General Public License along with *
* this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************/
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <sys/types.h>
#include <inttypes.h>
#include <stdarg.h>
#undef FALSE
#undef TRUE
#define FALSE 0
#define TRUE 1
+#ifndef __APPLE__
+ #define FOPEN fopen64
+#else
+ // Apple does use fopen for fopen64 too
+ #define FOPEN fopen
+#endif
+
/*
* Virtual image types
*/
typedef enum TVirtImageType {
/** Virtual image is a DD file */
TVirtImageType_DD,
/** Virtual image is a VDI file */
TVirtImageType_VDI,
/** Virtual image is a VMDK file (IDE bus)*/
TVirtImageType_VMDK,
/** Virtual image is a VMDK file (SCSI bus)*/
TVirtImageType_VMDKS
} TVirtImageType;
/*
* Input image types
*/
typedef enum TOrigImageType {
/** Input image is a DD file */
TOrigImageType_DD,
/** Input image is an EWF file */
TOrigImageType_EWF,
/** Input image is an AFF file */
TOrigImageType_AFF
} TOrigImageType;
/*
* Various mountimg runtime options
*/
typedef struct TXMountConfData {
/** Input image type */
TOrigImageType OrigImageType;
/** Virtual image type */
TVirtImageType VirtImageType;
/** Enable debug output */
uint32_t Debug;
/** Path of virtual image file */
char *pVirtualImagePath;
/** Path of virtual VMDK file */
char *pVirtualVmdkPath;
/** Path of virtual image info file */
char *pVirtualImageInfoPath;
/** Enable virtual write support */
uint32_t Writable;
/** Overwrite existing cache */
uint32_t OverwriteCache;
/** Cache file to save changes to */
char *pCacheFile;
/** Size of input image */
uint64_t OrigImageSize;
/** Size of virtual image */
uint64_t VirtImageSize;
/** Partial MD5 hash of input image */
uint64_t InputHashLo;
uint64_t InputHashHi;
} __attribute__ ((packed)) TXMountConfData;
/*
* VDI Binary File Header structure
*/
#define VDI_IMAGE_SIGNATURE 0xBEDA107F // 1:1 copy from hp
#define VDI_IMAGE_VERSION 0x00010001 // Vers 1.1
#define VDI_IMAGE_TYPE_FIXED 0x00000002 // Type 2 (fixed size)
#define VDI_IMAGE_FLAGS 0
#define VDI_IMAGE_BLOCK_SIZE (1024*1024) // 1 Megabyte
typedef struct TVdiFileHeader {
// ----- VDIPREHEADER ------
/** Just text info about image type, for eyes only. */
char szFileInfo[64];
/** The image signature (VDI_IMAGE_SIGNATURE). */
uint32_t u32Signature;
/** The image version (VDI_IMAGE_VERSION). */
uint32_t u32Version;
// ----- VDIHEADER1PLUS -----
/** Size of header structure in bytes. */
uint32_t cbHeader;
/** The image type (VDI_IMAGE_TYPE_*). */
uint32_t u32Type;
/** Image flags (VDI_IMAGE_FLAGS_*). */
uint32_t fFlags;
/** Image comment. (UTF-8) */
char szComment[256];
/** Offset of Blocks array from the begining of image file.
* Should be sector-aligned for HDD access optimization. */
uint32_t offBlocks;
/** Offset of image data from the begining of image file.
* Should be sector-aligned for HDD access optimization. */
uint32_t offData;
/** Legacy image geometry (previous code stored PCHS there). */
/** Cylinders. */
uint32_t cCylinders;
/** Heads. */
uint32_t cHeads;
/** Sectors per track. */
uint32_t cSectors;
/** Sector size. (bytes per sector) */
uint32_t cbSector;
/** Was BIOS HDD translation mode, now unused. */
uint32_t u32Dummy;
/** Size of disk (in bytes). */
uint64_t cbDisk;
/** Block size. (For instance VDI_IMAGE_BLOCK_SIZE.) Should be a power of 2! */
uint32_t cbBlock;
/** Size of additional service information of every data block.
* Prepended before block data. May be 0.
* Should be a power of 2 and sector-aligned for optimization reasons. */
uint32_t cbBlockExtra;
/** Number of blocks. */
uint32_t cBlocks;
/** Number of allocated blocks. */
uint32_t cBlocksAllocated;
/** UUID of image. */
uint64_t uuidCreate_l;
uint64_t uuidCreate_h;
/** UUID of image's last modification. */
uint64_t uuidModify_l;
uint64_t uuidModify_h;
/** Only for secondary images - UUID of previous image. */
uint64_t uuidLinkage_l;
uint64_t uuidLinkage_h;
/** Only for secondary images - UUID of previous image's last modification. */
uint64_t uuidParentModify_l;
uint64_t uuidParentModify_h;
/** Padding to get 512 byte alignment */
uint64_t padding0;
uint64_t padding1;
uint64_t padding2;
uint64_t padding3;
uint64_t padding4;
uint64_t padding5;
uint64_t padding6;
} __attribute__ ((packed)) TVdiFileHeader, *pTVdiFileHeader;
// /** The way the UUID is declared by the DCE specification. */
// struct
// {
// uint32_t u32TimeLow;
// uint16_t u16TimeMid;
// uint16_t u16TimeHiAndVersion;
// uint8_t u8ClockSeqHiAndReserved;
// uint8_t u8ClockSeqLow;
// uint8_t au8Node[6];
// } Gen;
/*
* Cache file block index array element
*/
#ifdef __LP64__
#define CACHE_BLOCK_FREE 0xFFFFFFFFFFFFFFFF
#else
#define CACHE_BLOCK_FREE 0xFFFFFFFFFFFFFFFFLL
#endif
typedef struct TCacheFileBlockIndex {
/** Set to 1 if block is assigned (This block has data in cache file) */
uint32_t Assigned;
/** Offset to data in cache file */
uint64_t off_data;
} __attribute__ ((packed)) TCacheFileBlockIndex, *pTCacheFileBlockIndex;
/*
* Cache file header structures
*/
#define CACHE_BLOCK_SIZE (1024*1024) // 1 megabyte
#ifdef __LP64__
#define CACHE_FILE_SIGNATURE 0xFFFF746E756F6D78 // "xmount\xFF\xFF"
#else
#define CACHE_FILE_SIGNATURE 0xFFFF746E756F6D78LL
#endif
#define CUR_CACHE_FILE_VERSION 0x00000002 // Current cache file version
#define HASH_AMOUNT (1024*1024)*10 // Amount of data used to construct a
// "unique" hash for every input image
// (10MByte)
// Current header
typedef struct TCacheFileHeader {
/** Simple signature to identify cache files */
uint64_t FileSignature;
/** Cache file version */
uint32_t CacheFileVersion;
/** Cache block size */
uint64_t BlockSize;
/** Total amount of cache blocks */
uint64_t BlockCount;
/** Offset to the first block index array element */
uint64_t pBlockIndex;
/** Set to 1 if VDI file header is cached */
uint32_t VdiFileHeaderCached;
/** Offset to cached VDI file header */
uint64_t pVdiFileHeader;
/** Set to 1 if VMDK file is cached */
uint32_t VmdkFileCached;
/** Size of VMDK file */
uint64_t VmdkFileSize;
/** Offset to cached VMDK file */
uint64_t pVmdkFile;
/** Padding until offset 512 to ease further additions */
char HeaderPadding[444];
} __attribute__ ((packed)) TCacheFileHeader, *pTCacheFileHeader;
// Old v1 header
typedef struct TCacheFileHeader_v1 {
/** Simple signature to identify cache files */
uint64_t FileSignature;
/** Cache file version */
uint32_t CacheFileVersion;
/** Total amount of cache blocks */
uint64_t BlockCount;
/** Offset to the first block index array element */
uint64_t pBlockIndex;
/** Set to 1 if VDI file header is cached */
uint32_t VdiFileHeaderCached;
/** Offset to cached VDI file header */
uint64_t pVdiFileHeader;
/** Set to 1 if VMDK file is cached */
} TCacheFileHeader_v1, *pTCacheFileHeader_v1;
/*
* Macros to ease debugging and error reporting
*/
#define LOG_ERROR(...) \
LogMessage("ERROR",(char*)__FUNCTION__,__LINE__,__VA_ARGS__);
#define LOG_DEBUG(...) { \
if(XMountConfData.Debug) \
LogMessage("DEBUG",(char*)__FUNCTION__,__LINE__,__VA_ARGS__); \
}
/*
* Macros to alloc or realloc memory and check whether it worked
*/
#define XMOUNT_MALLOC(var,var_type,size) { \
(var)=(var_type)malloc(size); \
if((var)==NULL) { \
LOG_ERROR("Couldn't allocate memmory!\n"); \
exit(1); \
} \
}
#define XMOUNT_REALLOC(var,var_type,size) { \
(var)=(var_type)realloc((var),size); \
if((var)==NULL) { \
LOG_ERROR("Couldn't allocate memmory!\n"); \
exit(1); \
} \
}
/*
* Macros for some often used string functions
*/
#define XMOUNT_STRSET(var1,var2) { \
XMOUNT_MALLOC(var1,char*,strlen(var2)+1) \
strcpy(var1,var2); \
}
#define XMOUNT_STRNSET(var1,var2,size) { \
XMOUNT_MALLOC(var1,char*,(size)+1) \
strncpy(var1,var2,size); \
(var1)[size]='\0'; \
}
#define XMOUNT_STRAPP(var1,var2) { \
XMOUNT_REALLOC(var1,char*,strlen(var1)+strlen(var2)+1) \
strcpy((var1)+strlen(var1),var2); \
}
#define XMOUNT_STRNAPP(var1,var2,size) { \
XMOUNT_REALLOC(var1,char*,strlen(var1)+(size)+1) \
(var1)[strlen(var1)+(size)]='\0'; \
strncpy((var1)+strlen(var1),var2,size); \
}
/*
----- Change history -----
20090226: * Added change history information to this file.
* Added TVirtImageType enum to identify virtual image type.
* Added TOrigImageType enum to identify input image type.
* Added TMountimgConfData struct to hold various mountimg runtime
options.
* Renamed VDIFILEHEADER to TVdiFileHeader.
20090228: * Added LOG_ERROR and LOG_DEBUG macros
* Added defines for various static VDI header values
* Added defines for TRUE and FALSE
20090307: * Added defines for various static cache file header values
* Added VdiFileHeaderCached and pVdiFileHeader values to be able to
cache the VDI file header separatly.
20090519: * Added new cache file header structure and moved old one to
TCacheFileHeader_v1.
* New cache file structure includes VmdkFileCached and pVmdkFile to
cache virtual VMDK file and makes room for further additions so
current cache file version 2 cache files can be easily converted
to newer ones.
20090814: * Added XMOUNT_MALLOC and XMOUNT_REALLOC macros.
20090816: * Added XMOUNT_STRSET, XMOUNT_STRNSET, XMOUNT_STRAPP and
XMOUNT_STRNAPP macros.
20100324: * Added "__attribute__ ((packed))" to all header structs to prevent
different sizes on i386 and amd64.
*/

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