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-rwxr-xr-x[-rw-r--r--]src/fuse/main.c943
1 files changed, 520 insertions, 423 deletions
diff --git a/src/fuse/main.c b/src/fuse/main.c
index 69659b5..861ab86 100644..100755
--- a/src/fuse/main.c
+++ b/src/fuse/main.c
@@ -1,423 +1,520 @@
-/*
- * FUSE: Filesystem in Userspace
- * Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
- * This program can be distributed under the terms of the GNU GPL.
- * See the file COPYING.
- *
- * Changed by Stephan Schwaer
- * */
-
-#include "connection.h"
-#include "helper.h"
-#include "../shared/protocol.h"
-#include "../shared/log.h"
-
-#define FUSE_USE_VERSION 30
-#include <fuse.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-/* for printing uint */
-#define __STDC_FORMAT_MACROS
-#include <inttypes.h>
-#include <getopt.h>
-#include <time.h>
-#include <signal.h>
-#include <pthread.h>
-
-#define debugf(...) do { logadd( LOG_DEBUG1, __VA_ARGS__ ); } while (0)
-
-static const char * const IMAGE_PATH = "/img";
-static const char * const STATS_PATH = "/status";
-
-static uint64_t imageSize;
-/* Debug/Benchmark variables */
-static bool useDebug = false;
-static log_info logInfo;
-static struct timespec startupTime;
-static uid_t owner;
-static bool keepRunning = true;
-static void (*fuse_sigIntHandler)(int) = NULL;
-static void (*fuse_sigTermHandler)(int) = NULL;
-static struct fuse_operations dnbd3_fuse_no_operations;
-
-#define SIGPOOLSIZE 6
-static pthread_spinlock_t sigLock;
-static dnbd3_signal_t *signalPool[SIGPOOLSIZE];
-static dnbd3_signal_t **sigEnd = signalPool + SIGPOOLSIZE;
-static void signalInit()
-{
- pthread_spin_init( &sigLock, PTHREAD_PROCESS_PRIVATE );
- for ( size_t i = 0; i < SIGPOOLSIZE; ++i ) {
- signalPool[i] = NULL;
- }
-}
-static inline dnbd3_signal_t *signalGet()
-{
- pthread_spin_lock( &sigLock );
- for ( dnbd3_signal_t **it = signalPool; it < sigEnd; ++it ) {
- if ( *it != NULL ) {
- dnbd3_signal_t *ret = *it;
- *it = NULL;
- pthread_spin_unlock( &sigLock );
- return ret;
- }
- }
- pthread_spin_unlock( &sigLock );
- return signal_newBlocking();
-}
-static inline void signalPut(dnbd3_signal_t *signal)
-{
- pthread_spin_lock( &sigLock );
- for ( dnbd3_signal_t **it = signalPool; it < sigEnd; ++it ) {
- if ( *it == NULL ) {
- *it = signal;
- pthread_spin_unlock( &sigLock );
- return;
- }
- }
- pthread_spin_unlock( &sigLock );
- signal_close( signal );
-}
-
-static int image_getattr(const char *path, struct stat *stbuf)
-{
- int res = 0;
- memset( stbuf, 0, sizeof( struct stat ) );
- stbuf->st_ctim = stbuf->st_atim = stbuf->st_mtim = startupTime;
- stbuf->st_uid = owner;
- if ( strcmp( path, "/" ) == 0 ) {
- stbuf->st_mode = S_IFDIR | 0550;
- stbuf->st_nlink = 2;
- } else if ( strcmp( path, IMAGE_PATH ) == 0 ) {
- stbuf->st_mode = S_IFREG | 0440;
- stbuf->st_nlink = 1;
- stbuf->st_size = imageSize;
- } else if ( strcmp( path, STATS_PATH ) == 0 ) {
- stbuf->st_mode = S_IFREG | 0440;
- stbuf->st_nlink = 1;
- stbuf->st_size = 4096;
- clock_gettime( CLOCK_REALTIME, &stbuf->st_mtim );
- } else {
- res = -ENOENT;
- }
- return res;
-}
-
-static int image_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset UNUSED, struct fuse_file_info *fi UNUSED)
-{
- if ( strcmp( path, "/" ) != 0 ) {
- return -ENOENT;
- }
- filler( buf, ".", NULL, 0 );
- filler( buf, "..", NULL, 0 );
- filler( buf, IMAGE_PATH + 1, NULL, 0 );
- filler( buf, STATS_PATH + 1, NULL, 0 );
- return 0;
-}
-
-static int image_open(const char *path, struct fuse_file_info *fi)
-{
- if ( strcmp( path, IMAGE_PATH ) != 0 && strcmp( path, STATS_PATH ) != 0 ) {
- return -ENOENT;
- }
- if ( ( fi->flags & 3 ) != O_RDONLY ) {
- return -EACCES;
- }
- return 0;
-}
-
-static int fillStatsFile(char *buf, size_t size, off_t offset) {
- if ( offset == 0 ) {
- return (int)connection_printStats( buf, size );
- }
- char buffer[4096];
- int ret = (int)connection_printStats( buffer, sizeof buffer );
- int len = MIN( ret - (int)offset, (int)size );
- if ( len == 0 )
- return 0;
- if ( len < 0 ) {
- return -EOF;
- }
- memcpy( buf, buffer + offset, len );
- return len;
-}
-
-static int image_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi UNUSED)
-{
- if ( size > __INT_MAX__ ) {
- // fuse docs say we MUST fill the buffer with exactly size bytes and return size,
- // otherwise the buffer will we padded with zeros. Since the return value is just
- // an int, we could not properly fulfill read requests > 2GB. Since there is no
- // mention of a guarantee that this will never happen, better add a safety check.
- // Way to go fuse.
- return -EIO;
- }
- if ( path[1] == STATS_PATH[1] ) {
- return fillStatsFile( buf, size, offset );
- }
-
- if ( (uint64_t)offset >= imageSize ) {
- return 0;
- }
-
- if ( offset + size > imageSize ) {
- size = imageSize - offset;
- }
-
- if ( useDebug ) {
- /* count the requested blocks */
- uint64_t startBlock = offset / ( 4096 );
- const uint64_t endBlock = ( offset + size - 1 ) / ( 4096 );
-
- for ( ; startBlock <= endBlock; startBlock++ ) {
- ++logInfo.blockRequestCount[startBlock];
- }
- }
-
- dnbd3_async_t request;
- request.buffer = buf;
- request.length = (uint32_t)size;
- request.offset = offset;
- request.signal = signalGet();
-
- if ( !connection_read( &request ) ) {
- signalPut( request.signal );
- return -EINVAL;
- }
- while ( !request.finished ) {
- int ret = signal_wait( request.signal, 5000 );
- if ( !keepRunning ) {
- connection_close();
- break;
- }
- if ( ret < 0 ) {
- debugf( "fuse_read signal wait returned %d", ret );
- }
- }
- signalPut( request.signal );
- if ( request.success ) {
- return request.length;
- } else {
- return -EIO;
- }
-}
-
-static void image_sigHandler(int signum) {
- keepRunning = false;
- if ( signum == SIGINT && fuse_sigIntHandler != NULL ) {
- fuse_sigIntHandler(signum);
- }
- if ( signum == SIGTERM && fuse_sigTermHandler != NULL ) {
- fuse_sigTermHandler(signum);
- }
-}
-
-static void* image_init(struct fuse_conn_info *conn UNUSED)
-{
- if ( !connection_initThreads() ) {
- logadd( LOG_ERROR, "Could not initialize threads for dnbd3 connection, exiting..." );
- exit( EXIT_FAILURE );
- }
- // Prepare our handler
- struct sigaction newHandler;
- memset( &newHandler, 0, sizeof(newHandler) );
- newHandler.sa_handler = &image_sigHandler;
- sigemptyset( &newHandler.sa_mask );
- struct sigaction oldHandler;
- // Retrieve old handlers when setting
- sigaction( SIGINT, &newHandler, &oldHandler );
- fuse_sigIntHandler = oldHandler.sa_handler;
- logadd( LOG_DEBUG1, "Previous SIGINT handler was %p", (void*)(uintptr_t)fuse_sigIntHandler );
- sigaction( SIGTERM, &newHandler, &oldHandler );
- fuse_sigTermHandler = oldHandler.sa_handler;
- logadd( LOG_DEBUG1, "Previous SIGTERM handler was %p", (void*)(uintptr_t)fuse_sigIntHandler );
- return NULL;
-}
-
-/* close the connection */
-static void image_destroy(void *private_data UNUSED)
-{
- if ( useDebug ) {
- printLog( &logInfo );
- }
- connection_close();
- return;
-}
-
-/* map the implemented fuse operations */
-static struct fuse_operations image_oper = {
- .getattr = image_getattr,
- .readdir = image_readdir,
- .open = image_open,
- .read = image_read,
- .init = image_init,
- .destroy = image_destroy,
-};
-
-static void printVersion()
-{
- char *arg[] = { "foo", "-V" };
- printf( "DNBD3-Fuse Version 1.2.3.4, protocol version %d\n", (int)PROTOCOL_VERSION );
- fuse_main( 2, arg, &dnbd3_fuse_no_operations, NULL );
- exit( 0 );
-}
-
-static void printUsage(char *argv0, int exitCode)
-{
- char *arg[] = { argv0, "-h" };
- printf( "Usage: %s [--debug] [--option mountOpts] --host <serverAddress(es)> --image <imageName> [--rid revision] <mountPoint>\n", argv0 );
- printf( "Or: %s [-d] [-o mountOpts] -h <serverAddress(es)> -i <imageName> [-r revision] <mountPoint>\n", argv0 );
- printf( " -h --host List of space separated hosts to use\n" );
- printf( " -i --image Remote image name to request\n" );
- printf( " -r --rid Revision to use (omit or pass 0 for latest)\n" );
- printf( " -l --log Write log to given location\n" );
- printf( " -o --option Mount options to pass to libfuse\n" );
- printf( " -d --debug Don't fork and print debug output (fuse > stderr, dnbd3 > stdout)\n" );
- fuse_main( 2, arg, &dnbd3_fuse_no_operations, NULL );
- exit( exitCode );
-}
-
-static const char *optString = "h:i:r:l:o:HvVdtsf";
-static const struct option longOpts[] = {
- { "host", required_argument, NULL, 'h' },
- { "image", required_argument, NULL, 'i' },
- { "rid", required_argument, NULL, 'r' },
- { "log", required_argument, NULL, 'l' },
- { "option", required_argument, NULL, 'o' },
- { "help", no_argument, NULL, 'H' },
- { "version", no_argument, NULL, 'v' },
- { "debug", no_argument, NULL, 'd' },
- { 0, 0, 0, 0 }
-};
-
-int main(int argc, char *argv[])
-{
- char *server_address = NULL;
- char *image_Name = NULL;
- char *log_file = NULL;
- uint16_t rid = 0;
- char **newArgv;
- int newArgc;
- int opt, lidx;
- bool testOpt = false;
-
- if ( argc <= 1 || strcmp( argv[1], "--help" ) == 0 || strcmp( argv[1], "--usage" ) == 0 ) {
- printUsage( argv[0], 0 );
- }
-
- // TODO Make log mask configurable
- log_setConsoleMask( 65535 );
- log_setConsoleTimestamps( true );
- log_setFileMask( 65535 );
-
- newArgv = calloc( argc + 10, sizeof(char*) );
- newArgv[0] = argv[0];
- newArgc = 1;
- while ( ( opt = getopt_long( argc, argv, optString, longOpts, &lidx ) ) != -1 ) {
- switch ( opt ) {
- case 'h':
- server_address = optarg;
- break;
- case 'i':
- image_Name = optarg;
- break;
- case 'r':
- rid = (uint16_t)atoi(optarg);
- break;
- case 'o':
- newArgv[newArgc++] = "-o";
- newArgv[newArgc++] = optarg;
- if ( strstr( optarg, "use_ino" ) != NULL ) {
- logadd( LOG_WARNING, "************************" );
- logadd( LOG_WARNING, "* WARNING: use_ino mount option is unsupported, use at your own risk!" );
- logadd( LOG_WARNING, "************************" );
- }
- if ( strstr( optarg, "intr" ) != NULL ) {
- logadd( LOG_WARNING, "************************" );
- logadd( LOG_WARNING, "* WARNING: intr mount option is unsupported, use at your own risk!" );
- logadd( LOG_WARNING, "************************" );
- }
- break;
- case 'l':
- log_file = optarg;
- break;
- case 'H':
- printUsage( argv[0], 0 );
- break;
- case 'v':
- case 'V':
- printVersion();
- break;
- case 'd':
- useDebug = true;
- newArgv[newArgc++] = "-d";
- break;
- case 's':
- useDebug = true;
- newArgv[newArgc++] = "-s";
- break;
- case 'f':
- useDebug = true;
- newArgv[newArgc++] = "-f";
- break;
- case 't':
- testOpt = true;
- break;
- default:
- printUsage( argv[0], EXIT_FAILURE );
- }
- }
-
- if ( optind >= argc ) { // Missing mount point
- printUsage( argv[0], EXIT_FAILURE );
- }
-
- if ( testOpt ) {
- /* values for testing. */
- server_address = "132.230.4.1 132.230.8.113 132.230.4.60";
- image_Name = "windows7-umwelt.vmdk";
- useDebug = true;
- }
- if ( server_address == NULL || image_Name == NULL ) {
- printUsage( argv[0], EXIT_FAILURE );
- }
-
- if ( log_file != NULL ) {
- if ( !log_openLogFile( log_file ) ) {
- logadd( LOG_WARNING, "Could not open log file at '%s'", log_file );
- }
- }
-
- if ( !connection_init( server_address, image_Name, rid ) ) {
- logadd( LOG_ERROR, "Could not connect to any server. Bye.\n" );
- return EXIT_FAILURE;
- }
- imageSize = connection_getImageSize();
-
- /* initialize benchmark variables */
- logInfo.receivedBytes = 0;
- logInfo.imageSize = imageSize;
- logInfo.imageBlockCount = ( imageSize + 4095 ) / 4096;
- if ( useDebug ) {
- logInfo.blockRequestCount = calloc( logInfo.imageBlockCount, sizeof(uint8_t) );
- } else {
- logInfo.blockRequestCount = NULL;
- }
-
- // Since dnbd3 is always read only and the remote image will not change
- newArgv[newArgc++] = "-o";
- newArgv[newArgc++] = "ro,auto_cache,default_permissions";
- // Mount point goes last
- newArgv[newArgc++] = argv[optind];
-
- printf( "ImagePathName: %s\nFuseArgs:",IMAGE_PATH );
- for ( int i = 0; i < newArgc; ++i ) {
- printf( " '%s'", newArgv[i] );
- }
- putchar('\n');
- clock_gettime( CLOCK_REALTIME, &startupTime );
- owner = getuid();
- signalInit();
- return fuse_main( newArgc, newArgv, &image_oper, NULL );
-}
+/*
+ * FUSE: Filesystem in Userspace
+ * Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
+ * This program can be distributed under the terms of the GNU GPL.
+ * See the file COPYING.
+ *
+ * Changed by Stephan Schwaer
+ * */
+
+#include "connection.h"
+#include "helper.h"
+#include "cow.h"
+#include "../shared/protocol.h"
+#include "../shared/log.h"
+
+
+#define FUSE_USE_VERSION 30
+#include <fuse.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* for printing uint */
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
+#include <getopt.h>
+#include <time.h>
+#include <signal.h>
+#include <pthread.h>
+
+#define debugf(...) do { logadd( LOG_DEBUG1, __VA_ARGS__ ); } while (0)
+
+static const char * const IMAGE_PATH = "/img.img";
+static const char * const STATS_PATH = "/status";
+
+uint64_t imageSize;
+/* Debug/Benchmark variables */
+static bool useDebug = false;
+static log_info logInfo;
+static struct timespec startupTime;
+static uid_t owner;
+static bool keepRunning = true;
+static void (*fuse_sigIntHandler)(int) = NULL;
+static void (*fuse_sigTermHandler)(int) = NULL;
+static struct fuse_operations dnbd3_fuse_no_operations;
+/*cow Variabels*/
+static bool useCow = false;
+
+
+
+#define SIGPOOLSIZE 6
+static pthread_spinlock_t sigLock;
+static dnbd3_signal_t *signalPool[SIGPOOLSIZE];
+static dnbd3_signal_t **sigEnd = signalPool + SIGPOOLSIZE;
+static void signalInit()
+{
+ pthread_spin_init( &sigLock, PTHREAD_PROCESS_PRIVATE );
+ for ( size_t i = 0; i < SIGPOOLSIZE; ++i ) {
+ signalPool[i] = NULL;
+ }
+}
+static inline dnbd3_signal_t *signalGet()
+{
+ pthread_spin_lock( &sigLock );
+ for ( dnbd3_signal_t **it = signalPool; it < sigEnd; ++it ) {
+ if ( *it != NULL ) {
+ dnbd3_signal_t *ret = *it;
+ *it = NULL;
+ pthread_spin_unlock( &sigLock );
+ return ret;
+ }
+ }
+ pthread_spin_unlock( &sigLock );
+ return signal_newBlocking();
+}
+static inline void signalPut(dnbd3_signal_t *signal)
+{
+ pthread_spin_lock( &sigLock );
+ for ( dnbd3_signal_t **it = signalPool; it < sigEnd; ++it ) {
+ if ( *it == NULL ) {
+ *it = signal;
+ pthread_spin_unlock( &sigLock );
+ return;
+ }
+ }
+ pthread_spin_unlock( &sigLock );
+ signal_close( signal );
+}
+
+static int image_getattr(const char *path, struct stat *stbuf)
+{
+ int res = 0;
+ memset( stbuf, 0, sizeof( struct stat ) );
+ stbuf->st_ctim = stbuf->st_atim = stbuf->st_mtim = startupTime;
+ stbuf->st_uid = owner;
+ if ( strcmp( path, "/" ) == 0 ) {
+ stbuf->st_mode = S_IFDIR | 0550;
+ stbuf->st_nlink = 2;
+ } else if ( strcmp( path, IMAGE_PATH ) == 0 ) {
+ if(useCow){
+ stbuf->st_mode = S_IFREG | 0777;
+ }else{
+ stbuf->st_mode = S_IFREG | 0440;
+ }
+ stbuf->st_nlink = 1;
+ stbuf->st_size = imageSize;
+ } else if ( strcmp( path, STATS_PATH ) == 0 ) {
+ stbuf->st_mode = S_IFREG | 0440;
+ stbuf->st_nlink = 1;
+ stbuf->st_size = 4096;
+ clock_gettime( CLOCK_REALTIME, &stbuf->st_mtim );
+ } else {
+ res = -ENOENT;
+ }
+ return res;
+}
+
+static int image_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset UNUSED, struct fuse_file_info *fi UNUSED)
+{
+ if ( strcmp( path, "/" ) != 0 ) {
+ return -ENOENT;
+ }
+ filler( buf, ".", NULL, 0 );
+ filler( buf, "..", NULL, 0 );
+ filler( buf, IMAGE_PATH + 1, NULL, 0 );
+ filler( buf, STATS_PATH + 1, NULL, 0 );
+ return 0;
+}
+
+static int image_open(const char *path, struct fuse_file_info *fi)
+{
+ if ( strcmp( path, IMAGE_PATH ) != 0 && strcmp( path, STATS_PATH ) != 0 ) {
+ return -ENOENT;
+ }
+ if( strcmp( path, IMAGE_PATH ) == 0&& useCow){
+ return 0;
+ }
+ if ( ( fi->flags & 3 ) != O_RDONLY ) {
+ return -EACCES;
+ }
+ return 0;
+}
+
+static int fillStatsFile(char *buf, size_t size, off_t offset) {
+ if ( offset == 0 ) {
+ return (int)connection_printStats( buf, size );
+ }
+ char buffer[4096];
+ int ret = (int)connection_printStats( buffer, sizeof buffer );
+ int len = MIN( ret - (int)offset, (int)size );
+ if ( len == 0 )
+ return 0;
+ if ( len < 0 ) {
+ return -EOF;
+ }
+ memcpy( buf, buffer + offset, len );
+ return len;
+}
+
+static int image_write(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi UNUSED)
+{
+ if ( path[1] == STATS_PATH[1] ) {
+ return -EIO;
+ }
+ if((((size_t)offset)+size) > imageSize){
+ //TODO Add Changed IMGASZE TO COW File
+ imageSize = ((size_t)offset)+size;
+ }
+ return write_cow(buf,size, offset);
+}
+int image_read_internal(char *buf,size_t size, off_t offset){
+ dnbd3_async_t request;
+ request.buffer = buf;
+ request.length = (uint32_t)size;
+ request.offset = offset;
+ request.signal = signalGet();
+ if ( !connection_read( &request ) ) {
+ signalPut( request.signal );
+ return -EINVAL;
+ }
+ while ( !request.finished ) {
+ int ret = signal_wait( request.signal, 5000 );
+ if ( !keepRunning ) {
+ connection_close();
+ break;
+ }
+ if ( ret < 0 ) {
+ debugf( "fuse_read signal wait returned %d", ret );
+ }
+ }
+ signalPut( request.signal );
+ if ( request.success ) {
+ return request.length;
+ } else {
+ return -EIO;
+ }
+
+}
+static int image_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi UNUSED)
+{
+ if ( size > __INT_MAX__ ) {
+ // fuse docs say we MUST fill the buffer with exactly size bytes and return size,
+ // otherwise the buffer will we padded with zeros. Since the return value is just
+ // an int, we could not properly fulfill read requests > 2GB. Since there is no
+ // mention of a guarantee that this will never happen, better add a safety check.
+ // Way to go fuse.
+ return -EIO;
+ }
+ if ( path[1] == STATS_PATH[1] ) {
+ return fillStatsFile( buf, size, offset );
+ }
+
+ if ( (uint64_t)offset >= imageSize ) {
+ return 0;
+ }
+
+ if ( offset + size > imageSize ) {
+ size = imageSize - offset;
+ }
+
+ if ( useDebug ) {
+ /* count the requested blocks */
+ uint64_t startBlock = offset / ( 4096 );
+ const uint64_t endBlock = ( offset + size - 1 ) / ( 4096 );
+
+ for ( ; startBlock <= endBlock; startBlock++ ) {
+ ++logInfo.blockRequestCount[startBlock];
+ }
+ }
+ if(useCow){
+ return cow_read(buf, size, offset);
+ } else {
+ return image_read_internal(buf,size,offset);
+ }
+}
+
+static void image_sigHandler(int signum) {
+ keepRunning = false;
+ if ( signum == SIGINT && fuse_sigIntHandler != NULL ) {
+ fuse_sigIntHandler(signum);
+ }
+ if ( signum == SIGTERM && fuse_sigTermHandler != NULL ) {
+ fuse_sigTermHandler(signum);
+ }
+}
+
+static void* image_init(struct fuse_conn_info *conn UNUSED)
+{
+ if ( !connection_initThreads() ) {
+ logadd( LOG_ERROR, "Could not initialize threads for dnbd3 connection, exiting..." );
+ exit( EXIT_FAILURE );
+ }
+ // Prepare our handler
+ struct sigaction newHandler;
+ memset( &newHandler, 0, sizeof(newHandler) );
+ newHandler.sa_handler = &image_sigHandler;
+ sigemptyset( &newHandler.sa_mask );
+ struct sigaction oldHandler;
+ // Retrieve old handlers when setting
+ sigaction( SIGINT, &newHandler, &oldHandler );
+ fuse_sigIntHandler = oldHandler.sa_handler;
+ logadd( LOG_DEBUG1, "Previous SIGINT handler was %p", (void*)(uintptr_t)fuse_sigIntHandler );
+ sigaction( SIGTERM, &newHandler, &oldHandler );
+ fuse_sigTermHandler = oldHandler.sa_handler;
+ logadd( LOG_DEBUG1, "Previous SIGTERM handler was %p", (void*)(uintptr_t)fuse_sigIntHandler );
+ return NULL;
+}
+
+/* close the connection */
+static void image_destroy(void *private_data UNUSED)
+{
+ if ( useDebug ) {
+ printLog( &logInfo );
+ }
+ connection_close();
+ return;
+}
+
+
+static int image_truncate(const char *path, off_t size, struct fuse_file_info *fi UNUSED){
+ imageSize=size;
+ //TODO Add Changed IMGASZE TO COW File
+ return 0;
+}
+static int image_ftruncate(const char *path, off_t size, struct fuse_file_info *fi UNUSED){
+ imageSize=size;
+ //TODO Add Changed IMGASZE TO COW File
+ return 0;
+}
+static int image_flush(const char *path, struct fuse_file_info *fi UNUSED){
+ return 0;
+}
+static int image_release(const char *path, struct fuse_file_info *fi UNUSED){
+ return 0;
+}
+
+static int image_fsync(const char *path, int in, struct fuse_file_info *fi UNUSED){
+ return 0;
+}
+static int image_access (const char *path, int in){
+ return 0;
+}
+
+
+
+/* map the implemented fuse operations without cow */
+static struct fuse_operations image_oper = {
+ .getattr = image_getattr,
+ .readdir = image_readdir,
+ .open = image_open,
+ .read = image_read,
+ .init = image_init,
+ .destroy = image_destroy,
+};
+/* map the implemented fuse operations with cow */
+static struct fuse_operations image_oper_cow = {
+ .getattr = image_getattr,
+ .readdir = image_readdir,
+ .open = image_open,
+ .read = image_read,
+ .init = image_init,
+ .destroy = image_destroy,
+ .ftruncate = image_ftruncate,
+ .flush = image_flush,
+ .release = image_release,
+ .write = image_write,
+ .truncate =image_truncate,
+ .fsync = image_fsync,
+ .access= image_access,
+};
+
+
+static void printVersion()
+{
+ char *arg[] = { "foo", "-V" };
+ printf( "DNBD3-Fuse Version 1.2.3.4, protocol version %d\n", (int)PROTOCOL_VERSION );
+ fuse_main( 2, arg, &dnbd3_fuse_no_operations, NULL );
+ exit( 0 );
+}
+
+static void printUsage(char *argv0, int exitCode)
+{
+ char *arg[] = { argv0, "-h" };
+ printf( "Usage: %s [--debug] [--option mountOpts] --host <serverAddress(es)> --image <imageName> [--rid revision] <mountPoint>\n", argv0 );
+ printf( "Or: %s [-d] [-o mountOpts] -h <serverAddress(es)> -i <imageName> [-r revision] <mountPoint>\n", argv0 );
+ printf( " -h --host List of space separated hosts to use\n" );
+ printf( " -i --image Remote image name to request\n" );
+ printf( " -r --rid Revision to use (omit or pass 0 for latest)\n" );
+ printf( " -l --log Write log to given location\n" );
+ printf( " -o --option Mount options to pass to libfuse\n" );
+ printf( " -d --debug Don't fork and print debug output (fuse > stderr, dnbd3 > stdout)\n" );
+ printf( " -c --cow Path where the cow file should be crated");
+ fuse_main( 2, arg, &dnbd3_fuse_no_operations, NULL );
+ exit( exitCode );
+}
+
+static const char *optString = "h:c:i:r:l:o:HvVdtsf";
+static const struct option longOpts[] = {
+ { "host", required_argument, NULL, 'h' },
+ { "image", required_argument, NULL, 'i' },
+ { "rid", required_argument, NULL, 'r' },
+ { "log", required_argument, NULL, 'l' },
+ { "option", required_argument, NULL, 'o' },
+ { "help", no_argument, NULL, 'H' },
+ { "version", no_argument, NULL, 'v' },
+ { "debug", no_argument, NULL, 'd' },
+ { 0, 0, 0, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ char *server_address = NULL;
+ char *image_Name = NULL;
+ char *log_file = NULL;
+ char *cow_path = NULL;
+ uint16_t rid = 0;
+ char **newArgv;
+ int newArgc;
+ int opt, lidx;
+ bool testOpt = false;
+
+ if ( argc <= 1 || strcmp( argv[1], "--help" ) == 0 || strcmp( argv[1], "--usage" ) == 0 ) {
+ printUsage( argv[0], 0 );
+ }
+
+ // TODO Make log mask configurable
+ log_setConsoleMask( 65535 );
+ log_setConsoleTimestamps( true );
+ log_setFileMask( 65535 );
+
+ newArgv = calloc( argc + 10, sizeof(char*) );
+ newArgv[0] = argv[0];
+ newArgc = 1;
+ while ( ( opt = getopt_long( argc, argv, optString, longOpts, &lidx ) ) != -1 ) {
+ switch ( opt ) {
+ case 'h':
+ server_address = optarg;
+ break;
+ case 'i':
+ image_Name = optarg;
+ break;
+ case 'r':
+ rid = (uint16_t)atoi(optarg);
+ break;
+ case 'o':
+ newArgv[newArgc++] = "-o";
+ newArgv[newArgc++] = optarg;
+ if ( strstr( optarg, "use_ino" ) != NULL ) {
+ logadd( LOG_WARNING, "************************" );
+ logadd( LOG_WARNING, "* WARNING: use_ino mount option is unsupported, use at your own risk!" );
+ logadd( LOG_WARNING, "************************" );
+ }
+ if ( strstr( optarg, "intr" ) != NULL ) {
+ logadd( LOG_WARNING, "************************" );
+ logadd( LOG_WARNING, "* WARNING: intr mount option is unsupported, use at your own risk!" );
+ logadd( LOG_WARNING, "************************" );
+ }
+ break;
+ case 'l':
+ log_file = optarg;
+ break;
+ case 'H':
+ printUsage( argv[0], 0 );
+ break;
+ case 'v':
+ case 'V':
+ printVersion();
+ break;
+ case 'd':
+ useDebug = true;
+ newArgv[newArgc++] = "-d";
+ break;
+ case 's':
+ useDebug = true;
+ newArgv[newArgc++] = "-s";
+ break;
+ case 'f':
+ useDebug = true;
+ newArgv[newArgc++] = "-f";
+ break;
+ case 't':
+ testOpt = true;
+ break;
+ case 'c':
+ cow_path = optarg;
+ useCow=true;
+ break;
+ default:
+ printUsage( argv[0], EXIT_FAILURE );
+ }
+ }
+
+ if ( optind >= argc ) { // Missing mount point
+ printUsage( argv[0], EXIT_FAILURE );
+ }
+
+ if ( testOpt ) {
+ /* values for testing. */
+ server_address = "132.230.4.1 132.230.8.113 132.230.4.60";
+ image_Name = "windows7-umwelt.vmdk";
+ useDebug = true;
+ }
+ if ( server_address == NULL || image_Name == NULL ) {
+ printUsage( argv[0], EXIT_FAILURE );
+ }
+
+ if ( log_file != NULL ) {
+ if ( !log_openLogFile( log_file ) ) {
+ logadd( LOG_WARNING, "Could not open log file at '%s'", log_file );
+ }
+ }
+
+ if ( !connection_init( server_address, image_Name, rid ) ) {
+ logadd( LOG_ERROR, "Could not connect to any server. Bye.\n" );
+ return EXIT_FAILURE;
+ }
+ imageSize = connection_getImageSize();
+
+ /* initialize benchmark variables */
+ logInfo.receivedBytes = 0;
+ logInfo.imageSize = imageSize;
+ logInfo.imageBlockCount = ( imageSize + 4095 ) / 4096;
+ if ( useDebug ) {
+ logInfo.blockRequestCount = calloc( logInfo.imageBlockCount, sizeof(uint8_t) );
+ } else {
+ logInfo.blockRequestCount = NULL;
+ }
+ if(useCow){
+ printf("Using Cow");
+ if(!create_cow_file(cow_path, image_Name, imageSize)){
+ logadd( LOG_ERROR, "Could not create COW FIle. Bye.\n" );
+ return EXIT_FAILURE;
+ }
+ }
+ // Since dnbd3 is always read only and the remote image will not change
+ newArgv[newArgc++] = "-o";
+ if(useCow){
+ newArgv[newArgc++] = "auto_cache,default_permissions";
+ }else{
+ newArgv[newArgc++] = "ro,auto_cache,default_permissions";
+ }
+
+ // Mount point goes last
+ newArgv[newArgc++] = argv[optind];
+
+ printf( "ImagePathName: %s\nFuseArgs:",IMAGE_PATH );
+ for ( int i = 0; i < newArgc; ++i ) {
+ printf( " '%s'", newArgv[i] );
+ }
+ putchar('\n');
+ clock_gettime( CLOCK_REALTIME, &startupTime );
+ owner = getuid();
+ signalInit();
+ if(useCow){
+ return fuse_main( newArgc, newArgv, &image_oper_cow, NULL );
+ }else {
+ return fuse_main( newArgc, newArgv, &image_oper, NULL );
+
+ }
+}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-04-19 13:00:23 +0200