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https://github.com/OpenNebula/one.git
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480 lines
12 KiB
C++
480 lines
12 KiB
C++
/* ------------------------------------------------------------------------ */
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/* Copyright 2002-2012, OpenNebula Project Leads (OpenNebula.org) */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------*/
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#ifndef IMAGE_H_
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#define IMAGE_H_
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#include "PoolSQL.h"
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#include "ImageTemplate.h"
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#include "NebulaLog.h"
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using namespace std;
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/**
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* The Image class.
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*/
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class Image : public PoolObjectSQL
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{
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public:
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/**
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* Type of Images
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*/
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enum ImageType
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{
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OS = 0, /** < Base OS image */
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CDROM = 1, /** < An ISO9660 image */
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DATABLOCK = 2 /** < User persistent data device */
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};
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/**
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* Return the string representation of an ImageType
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* @param ob the type
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* @return the string
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*/
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static string type_to_str(ImageType ob)
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{
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switch (ob)
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{
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case OS: return "OS" ; break;
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case CDROM: return "CDROM" ; break;
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case DATABLOCK: return "DATABLOCK" ; break;
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default: return "";
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}
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};
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/**
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* Image State
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*/
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enum ImageState
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{
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INIT = 0, /** < Initialization state */
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READY = 1, /** < Image ready to use */
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USED = 2, /** < Image in use */
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DISABLED = 3, /** < Image can not be instantiated by a VM */
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LOCKED = 4, /** < FS operation for the Image in process */
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ERROR = 5 /** < Error state the operation FAILED*/
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};
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// *************************************************************************
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// Image Public Methods
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// *************************************************************************
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/**
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* Function to print the Image object into a string in XML format
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* @param xml the resulting XML string
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* @return a reference to the generated string
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*/
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string& to_xml(string& xml) const;
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/**
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* Rebuilds the object from an xml formatted string
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* @param xml_str The xml-formatted string
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*
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* @return 0 on success, -1 otherwise
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*/
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int from_xml(const string &xml_str);
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/**
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* Returns true if the image is persistent
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* @return true if the image is persistent
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*/
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bool isPersistent() const
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{
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return (persistent_img == 1);
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};
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/**
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* Returns the source path of the image
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* @return source of image
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*/
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const string& get_source() const
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{
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return source;
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}
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/**
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* Returns the original path of the image
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* @return path of image
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*/
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const string& get_path() const
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{
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return path;
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}
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/**
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* Returns the fs_type for the image (defined for datablocks)
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* @return fs_type
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*/
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const string& get_fstype() const
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{
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return fs_type;
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}
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/**
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* Returns the size of the image
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* @return size in mb
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*/
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int get_size() const
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{
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return size_mb;
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}
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/**
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* Sets the source path of the image
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*/
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void set_source(const string& _source)
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{
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source = _source;
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}
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/**
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* Sets the size for the image
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*/
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void set_size(unsigned int _size_mb)
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{
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size_mb = _size_mb;
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}
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/**
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* Returns the type of the image
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* @return type
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*/
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ImageType get_type()
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{
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return type;
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}
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/**
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* Returns the image state
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* @return state of image
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*/
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ImageState get_state()
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{
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return state;
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}
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/**
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* Sets the image state
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* @param state of image
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*/
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void set_state(ImageState _state)
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{
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state = _state;
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}
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/**
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*
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*/
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int dec_running ()
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{
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return --running_vms;
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}
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/**
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*
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*/
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int inc_running()
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{
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return ++running_vms;
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}
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/**
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*
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*/
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int get_running()
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{
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return running_vms;
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}
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/**
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* Sets the Image type.
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*
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* @param _type the new type. It will be transformed to upper case
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* @return 0 on success, -1 otherwise
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*/
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int set_type(string& _type);
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/**
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* Check if the image can be used by other users
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* @return true if group or others can access the image
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*/
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bool isPublic()
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{
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return (group_u == 1 || other_u == 1);
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}
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/**
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* Check if the image is used for saving_as a current one
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* @return true if the image will be used to save an existing image.
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*/
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bool isSaving()
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{
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ImageTemplate * it = static_cast<ImageTemplate *>(obj_template);
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return it->is_saving();
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}
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/**
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* Set permissions for the Image. Extends the PoolSQLObject method
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* by checking the persistent state of the image.
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*/
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int set_permissions(int _owner_u,
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int _owner_m,
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int _owner_a,
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int _group_u,
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int _group_m,
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int _group_a,
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int _other_u,
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int _other_m,
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int _other_a,
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string& error_str)
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{
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if ( isPersistent() && (_group_u == 1 || _other_u == 1) )
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{
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error_str = "Image cannot be public and persistent.";
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return -1;
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}
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return PoolObjectSQL::set_permissions(_owner_u, _owner_m, _owner_a,
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_group_u, _group_m, _group_a,
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_other_u, _other_m, _other_a,
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error_str);
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};
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/**
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* Set/Unset an image as persistent
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* @param persistent true to make an image persistent
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* @param error_str Returns the error reason, if any
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*
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* @return 0 on success
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*/
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int persistent(bool persis, string& error_str)
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{
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if ( running_vms != 0 )
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{
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goto error_vms;
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}
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if (persis == true)
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{
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if ( isPublic() )
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{
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goto error_public;
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}
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persistent_img = 1;
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}
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else
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{
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persistent_img = 0;
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}
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return 0;
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error_vms:
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error_str = "Image cannot be in 'used' state.";
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goto error_common;
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error_public:
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error_str = "Image cannot be public and persistent.";
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goto error_common;
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error_common:
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return -1;
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}
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/**
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* Modifies the given disk attribute adding the following attributes:
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* * SOURCE: the file-path.
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* * BUS: will only be set if the Image's definition includes it.
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* * TARGET: the value set depends on:
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* - OS images will be mounted at prefix + a: hda, sda.
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* - Prefix + b is reserved for the contex cdrom.
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* - CDROM images will be at prefix + c: hdc, sdc.
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* - Several DATABLOCK images can be mounted, they will be set to
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* prefix + (d + index) : hdd, hde, hdf...
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* @param disk attribute for the VM template
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* @param index number of datablock images used by the same VM. Will be
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* automatically increased.
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* @param img_type will be set to the used image's type
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*/
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int disk_attribute(VectorAttribute * disk, int* index, ImageType* img_type);
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/**
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* Factory method for image templates
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*/
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Template * get_new_template() const
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{
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return new ImageTemplate;
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}
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/**
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* Returns the Datastore ID
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*/
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int get_ds_id() const
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{
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return ds_id;
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};
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/**
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* Returns the Datastore ID
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*/
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const string& get_ds_name() const
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{
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return ds_name;
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};
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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class ImagePool;
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// -------------------------------------------------------------------------
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// Image Description
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// -------------------------------------------------------------------------
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/**
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* Type of the Image
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*/
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ImageType type;
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/**
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* Persistency of the Image
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*/
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int persistent_img;
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/**
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* Registration time
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*/
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time_t regtime;
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/**
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* Path to the image
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*/
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string source;
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/**
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* Original Path to the image (optional if source is given or datablock)
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*/
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string path;
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/**
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* File system type for the image (mandatory for datablocks)
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*/
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string fs_type;
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/**
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* Size of the image in MB
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*/
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unsigned int size_mb;
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/**
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* Image state
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*/
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ImageState state;
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/**
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* Number of VMs using the image
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*/
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int running_vms;
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/**
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* Datastore ID
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*/
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int ds_id;
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/**
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* Datastore name
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*/
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string ds_name;
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// *************************************************************************
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// DataBase implementation (Private)
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// *************************************************************************
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/**
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* Execute an INSERT or REPLACE Sql query.
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* @param db The SQL DB
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* @param replace Execute an INSERT or a REPLACE
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* @param error_str Returns the error reason, if any
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* @return 0 on success
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*/
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int insert_replace(SqlDB *db, bool replace, string& error_str);
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/**
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* Bootstraps the database table(s) associated to the Image
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* @return 0 on success
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*/
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static int bootstrap(SqlDB * db)
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{
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ostringstream oss_image(Image::db_bootstrap);
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return db->exec(oss_image);
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};
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/**
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* "Encrypts" the password with SHA1 digest
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* @param password
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* @return sha1 encrypted password
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*/
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static string sha1_digest(const string& pass);
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protected:
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// *************************************************************************
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// Constructor
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// *************************************************************************
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Image(int uid,
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int gid,
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const string& uname,
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const string& gname,
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ImageTemplate* img_template);
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virtual ~Image();
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// *************************************************************************
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// DataBase implementation
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// *************************************************************************
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static const char * db_names;
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static const char * db_bootstrap;
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static const char * table;
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/**
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* Writes the Image in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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virtual int insert(SqlDB *db, string& error_str);
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/**
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* Writes/updates the Images data fields in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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virtual int update(SqlDB *db);
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};
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#endif /*IMAGE_H_*/
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