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/* ------------------------------------------------------------------------ */
/* Copyright 2002-2013, OpenNebula Project (OpenNebula.org), C12G Labs */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------*/
#ifndef IMAGE_H_
#define IMAGE_H_
#include "PoolSQL.h"
#include "ImageTemplate.h"
#include "NebulaLog.h"
#include "ObjectCollection.h"
using namespace std;
/**
* The Image class.
*/
class Image : public PoolObjectSQL
{
public:
/**
* Type of Images
*/
enum ImageType
{
OS = 0, /** < Base OS image */
CDROM = 1, /** < An ISO9660 image */
DATABLOCK = 2, /** < User persistent data device */
KERNEL = 3, /** < Kernel files */
RAMDISK = 4, /** < Initrd files */
CONTEXT = 5 /** < Context files */
};
/**
* Return the string representation of an ImageType
* @param ob the type
* @return the string
*/
static string type_to_str(ImageType ob)
{
switch (ob)
{
case OS: return "OS" ; break;
case CDROM: return "CDROM" ; break;
case DATABLOCK: return "DATABLOCK" ; break;
case KERNEL: return "KERNEL" ; break;
case RAMDISK: return "RAMDISK" ; break;
case CONTEXT: return "CONTEXT" ; break;
default: return "";
}
};
/**
* Return the string representation of an ImageType
* @param ob the type
* @return the string
*/
static ImageType str_to_type(string& str_type);
/**
* Type of Disks (used by the VMM_MAD). Values: BLOCK, CDROM or
* FILE
*/
enum DiskType
{
FILE = 0, /** < File-based disk */
CD_ROM = 1, /** < An ISO9660 disk */
BLOCK = 2, /** < Block-device disk */
RBD = 3, /** < CEPH RBD disk */
RBD_CDROM = 4, /** < CEPH RBD CDROM disk */
GLUSTER = 5 /** < Gluster Block Device */
};
/**
* Return the string representation of a DiskType
* @param ob the type
* @return the string
*/
static string disk_type_to_str(DiskType ob)
{
switch (ob)
{
case FILE: return "FILE" ; break;
case CD_ROM: return "CDROM" ; break;
case BLOCK: return "BLOCK" ; break;
case RBD: return "RBD" ; break;
case RBD_CDROM: return "RBD_CDROM" ; break;
case GLUSTER: return "GLUSTER" ; break;
default: return "";
}
};
/**
* Return the string representation of a DiskType
* @param s_disk_type string representing the DiskTypr
* @return the DiskType (defaults to FILE)
*/
static DiskType str_to_disk_type(string& s_disk_type);
/**
* Image State
*/
enum ImageState
{
INIT = 0, /** < Initialization state */
READY = 1, /** < Image ready to use */
USED = 2, /** < Image in use */
DISABLED = 3, /** < Image can not be instantiated by a VM */
LOCKED = 4, /** < FS operation for the Image in process */
ERROR = 5, /** < Error state the operation FAILED*/
CLONE = 6, /** < Image is being cloned */
DELETE = 7, /** < DS is deleting the image */
USED_PERS = 8 /** < Image is in use and persistent */
};
/**
* Returns the string representation of an ImageState
* @param state The state
* @return the string representation
*/
static string state_to_str(ImageState state)
{
switch(state)
{
case INIT: return "INIT"; break;
case READY: return "READY"; break;
case USED: return "USED"; break;
case DISABLED: return "DISABLED"; break;
case LOCKED: return "LOCKED"; break;
case ERROR: return "ERROR"; break;
case CLONE: return "CLONE"; break;
case DELETE: return "DELETE"; break;
case USED_PERS: return "USED"; break;
default: return "";
}
};
// *************************************************************************
// Image Public Methods
// *************************************************************************
/**
* Function to print the Image object into a string in XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
string& to_xml(string& xml) const;
/**
* Rebuilds the object from an xml formatted string
* @param xml_str The xml-formatted string
*
* @return 0 on success, -1 otherwise
*/
int from_xml(const string &xml_str);
/**
* Returns true if the image is persistent
* @return true if the image is persistent
*/
bool isPersistent() const
{
return (persistent_img == 1);
};
/**
* Returns the source path of the image
* @return source of image
*/
const string& get_source() const
{
return source;
}
/**
* Returns the original path of the image
* @return path of image
*/
const string& get_path() const
{
return path;
}
/**
* Returns the fs_type for the image (defined for datablocks)
* @return fs_type
*/
const string& get_fstype() const
{
return fs_type;
}
/**
* Returns the size of the image
* @return size in MB
*/
long long get_size() const
{
return size_mb;
}
/**
* Sets the source path of the image
*/
void set_source(const string& _source)
{
source = _source;
}
/**
* Sets the size for the image
*/
void set_size(long long _size_mb)
{
size_mb = _size_mb;
}
/**
* Returns the type of the image
* @return type
*/
ImageType get_type() const
{
return type;
}
/**
* Returns the image state
* @return state of image
*/
ImageState get_state() const
{
return state;
}
/**
* Sets the image state
* @param state of image
*/
void set_state(ImageState _state)
{
state = _state;
}
/**
* Return the ID of the image we are cloning this one from (if any)
*/
int get_cloning_id() const
{
return cloning_id;
}
/**
* Sets the ID of the image we are cloning this one from (if any)
*/
void set_cloning_id(int id)
{
cloning_id = id;
}
/**
* Clear the cloning state of the image
*/
void clear_cloning_id()
{
cloning_id = -1;
}
/* ---------------------------------------------------------------------- */
/* Access Image Counters (running vms and cloning operations ) */
/* ---------------------------------------------------------------------- */
int dec_running (int vm_id)
{
if ( vm_collection.del_collection_id(vm_id) == 0 )
{
running_vms--;
}
return running_vms;
}
int inc_running(int vm_id)
{
if ( vm_collection.add_collection_id(vm_id) == 0 )
{
running_vms++;
}
return running_vms;
}
int get_running() const
{
return running_vms;
}
int get_cloning() const
{
return cloning_ops;
}
int dec_cloning(int img_id)
{
if ( img_clone_collection.del_collection_id(img_id) == 0 )
{
cloning_ops--;
}
return cloning_ops;
}
int inc_cloning(int img_id)
{
if ( img_clone_collection.add_collection_id(img_id) == 0 )
{
cloning_ops++;
}
return cloning_ops;
}
/**
* Sets the Image type.
*
* @param _type the new type. It will be transformed to upper case
* @return 0 on success, -1 otherwise
*/
int set_type(string& _type);
/**
* Check if the image can be used by other users
* @return true if group or others can access the image
*/
bool isPublic()
{
return (group_u == 1 || other_u == 1);
}
/**
* Check if the image is used for saving_as a current one
* @return true if the image will be used to save an existing image.
*/
bool isSaving()
{
ImageTemplate * it = static_cast<ImageTemplate *>(obj_template);
return it->is_saving();
}
/**
* Check if the image is a hot snapshot
* @return true if image is a hot snapshot
*/
bool isHot()
{
ImageTemplate * it = static_cast<ImageTemplate *>(obj_template);
return it->is_saving_hot();
}
/**
* Set permissions for the Image. Extends the PoolSQLObject method
* by checking the persistent state of the image.
*/
int set_permissions(int _owner_u,
int _owner_m,
int _owner_a,
int _group_u,
int _group_m,
int _group_a,
int _other_u,
int _other_m,
int _other_a,
string& error_str)
{
if ( isPersistent() && (_group_u == 1 || _other_u == 1) )
{
error_str = "Image cannot be public and persistent.";
return -1;
}
return PoolObjectSQL::set_permissions(_owner_u, _owner_m, _owner_a,
_group_u, _group_m, _group_a,
_other_u, _other_m, _other_a,
error_str);
};
/**
* Set/Unset an image as persistent
* @param persistent true to make an image persistent
* @param error_str Returns the error reason, if any
*
* @return 0 on success
*/
int persistent(bool persis, string& error_str)
{
ostringstream oss;
switch(state)
{
case USED:
case CLONE:
case USED_PERS:
goto error_state;
break;
case INIT:
case READY:
case DISABLED:
case LOCKED:
case ERROR:
case DELETE:
if (persis == true)
{
if ( isPublic() )
{
goto error_public;
}
persistent_img = 1;
}
else
{
persistent_img = 0;
}
break;
}
return 0;
error_state:
oss << "Image cannot be in state " << state_to_str(state) << ".";
error_str = oss.str();
goto error_common;
error_public:
error_str = "Image cannot be public and persistent.";
goto error_common;
error_common:
return -1;
}
/**
* Modifies the given disk attribute adding the following attributes:
* * SOURCE: the file-path.
* * TARGET: will only be set if the Image's definition includes it.
*
* @param disk attribute for the VM template
* @param img_type will be set to the used image's type
* @param dev_prefix will be set to the defined dev_prefix,
* or the default one
*
* @return 0 on success, -1 otherwise
*/
int disk_attribute( VectorAttribute * disk,
ImageType& img_type,
string& dev_prefix);
/**
* Factory method for image templates
*/
Template * get_new_template() const
{
return new ImageTemplate;
}
/**
* Returns the Datastore ID
*/
int get_ds_id() const
{
return ds_id;
};
/**
* Returns the Datastore name
*/
const string& get_ds_name() const
{
return ds_name;
};
/**
* Updates the Datastore name
*/
void set_ds_name(const string& name)
{
ds_name = name;
};
/**
* Clones this image template including image specific attributes: NAME,
* TYPE, PATH, FSTYPE, SIZE and PERSISTENT
* @param new_name Value for the NAME attribute
* @return Pointer to the new tempalte 0 in case of success
*/
ImageTemplate * clone_template(const string& new_name) const;
private:
// -------------------------------------------------------------------------
// Friends
// -------------------------------------------------------------------------
friend class ImagePool;
// -------------------------------------------------------------------------
// Image Description
// -------------------------------------------------------------------------
/**
* Type of the Image
*/
ImageType type;
/**
* Type for the Disk
*/
DiskType disk_type;
/**
* Persistency of the Image
*/
int persistent_img;
/**
* Registration time
*/
time_t regtime;
/**
* Path to the image
*/
string source;
/**
* Original Path to the image (optional if source is given or datablock)
*/
string path;
/**
* File system type for the image (mandatory for datablocks)
*/
string fs_type;
/**
* Size of the image in MB
*/
long long size_mb;
/**
* Image state
*/
ImageState state;
/**
* Number of VMs using the image
*/
int running_vms;
/**
* Number of pending cloning operations
*/
int cloning_ops;
/**
* Indicates if this Image is a clone of another one.
* Once the clone process is complete, it should be set to -1
*/
int cloning_id;
/**
* Datastore ID
*/
int ds_id;
/**
* Datastore name
*/
string ds_name;
/**
* Stores a collection with the VMs using the image
*/
ObjectCollection vm_collection;
/**
* Stores a collection with the Images cloning this image
*/
ObjectCollection img_clone_collection;
// *************************************************************************
// DataBase implementation (Private)
// *************************************************************************
/**
* Execute an INSERT or REPLACE Sql query.
* @param db The SQL DB
* @param replace Execute an INSERT or a REPLACE
* @param error_str Returns the error reason, if any
* @return 0 on success
*/
int insert_replace(SqlDB *db, bool replace, string& error_str);
/**
* Bootstraps the database table(s) associated to the Image
* @return 0 on success
*/
static int bootstrap(SqlDB * db)
{
ostringstream oss_image(Image::db_bootstrap);
return db->exec(oss_image);
};
/**
* "Encrypts" the password with SHA1 digest
* @param password
* @return sha1 encrypted password
*/
static string sha1_digest(const string& pass);
protected:
// *************************************************************************
// Constructor
// *************************************************************************
Image(int uid,
int gid,
const string& uname,
const string& gname,
int umask,
ImageTemplate* img_template);
virtual ~Image();
// *************************************************************************
// DataBase implementation
// *************************************************************************
static const char * db_names;
static const char * db_bootstrap;
static const char * table;
/**
* Writes the Image in the database.
* @param db pointer to the db
* @return 0 on success
*/
virtual int insert(SqlDB *db, string& error_str);
/**
* Writes/updates the Images data fields in the database.
* @param db pointer to the db
* @return 0 on success
*/
virtual int update(SqlDB *db);
};
#endif /*IMAGE_H_*/
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