int smsa_vunmount( void ) {
// Free cache
smsa_close_cache();
// Begin unmounting, log an error is unsucessful
if( smsa_operation( UNMOUNT_DISK, NULL ) == -1 ) {
logMessage( LOG_ERROR_LEVEL, "Unmounting disk failed...aborting\n" );
return -1;
}
return 0;
}
int smsa_vunmount( void ) {
uint32_t command; //holds the generated "unmount" command.
ERROR_SOURCE err = 0; //holds return values of function calls to checkForErrors
if ( DEBUG )
printCache( cache_hits, disk_reads);
//save the contents of the memory to a file, so that
//it can be restored when mount is called again, rather
//than setting it to all zeros. If an error occurs in this
//function we will not return a 1 since it is not a catastrophic
//error, and the virtual memory will still function properly
//once mount is called
// err = saveDiskToFile();
//generate the op command so that we can use it to call
//the smsa_operation function to unmount the disk. Once
//again, DONT_CARE is defined as 0. After function call
//command will contain the value neccessary to call
//smsa_operation in order to unmount the disk
err = generateOPCommand ( &command, SMSA_UNMOUNT, DONT_CARE, DONT_CARE, DONT_CARE );
if ( DEBUG )
logMessage ( LOG_INFO_LEVEL, "Sending UNMOUNT Command Across the Network");
//call function with the "mount" op command,
//and NULL set as the parameter for the char*,
//since we will not use this char* in the mount
//function
if ( smsa_client_operation ( command, NULL ) ) {
logMessage ( LOG_INFO_LEVEL, "_smsa_vunmount:Failed to send UNMOUNT command on the network");
return 1;
logMessage ( LOG_INFO_LEVEL, "Successfully Unmounted the Disk" );
//free cache
if ( smsa_close_cache() )
logMessage ( LOG_INFO_LEVEL, "_smsa_vunmount:Failed to properly close cache in smsa_close_cache()" );
return 1;
}
//if checkForErrors finds that err is non-zero, it will return 1.
//see smsa_driver.h for error enum definition
return ( checkForErrors ( err, "_vumount", DONT_CARE, DONT_CARE, DONT_CARE, DONT_CARE,
DONT_CARE, DONT_CARE, DONT_CARE, DONT_CARE ) );
}