<htmlxmlns="http://www.w3.org/1999/xhtml"><head><metahttp-equiv="Content-Type"content="text/html; charset=ISO-8859-1"/><linkrel="stylesheet"type="text/css"href="../libvirt.css"/><linkrel="SHORTCUT ICON"href="/32favicon.png"/><title>Module libvirt from libvirt</title></head><body><divid="container"><divid="intro"><divid="adjustments"></div><divid="pageHeader"></div><divid="content2"><h1class="style1">Module libvirt from libvirt</h1><tableclass="navigation"width="100%"summary="Navigation header"cellpadding="2"cellspacing="2"><trvalign="middle"><td><aaccesskey="u"href="index.html"><imgsrc="up.png"width="24"height="24"border="0"alt="Up"/></a></td><thalign="left"><ahref="index.html">API documentation</a></th><td><aaccesskey="h"href="../index.html"><imgsrc="home.png"width="24"height="24"border="0"alt="Home"/></a></td><thalign="center"><ahref="../index.html">The virtualization API</a></th><thalign="right"><ahref="libvirt-virterror.html">virterror</a></th><td><aaccesskey="n"href="libvirt-virterror.html"><imgsrc="right.png"width="24"height="24"border="0"alt="Next"/></a></td></tr></table><p>Provides the interfaces of the libvirt library to handle Xen domains from a process running in domain 0 </p><h2>Table of Contents</h2><preclass="programlisting">#define <ahref="#LIBVIR_VERSION_NUMBER">LIBVIR_VERSION_NUMBER</a></pre><preclass="programlisting">#define <ahref="#VIR_COPY_CPUMAP">VIR_COPY_CPUMAP</a></pre><preclass="programlisting">#define <ahref="#VIR_CPU_MAPLEN">VIR_CPU_MAPLEN</a></pre><preclass="programlisting">#define <ahref="#VIR_CPU_USABLE">VIR_CPU_USABLE</a></pre><preclass="programlisting">#define <ahref="#VIR_DOMAIN_SCHED_FIELD_LENGTH">VIR_DOMAIN_SCHED_FIELD_LENGTH</a></pre><preclass="programlisting">#define <ahref="#VIR_GET_CPUMAP">VIR_GET_CPUMAP</a></pre><preclass="programlisting">#define <ahref="#VIR_NODEINFO_MAXCPUS">VIR_NODEINFO_MAXCPUS</a></pre><preclass="programlisting">#define <ahref="#VIR_UNUSE_CPU">VIR_UNUSE_CPU</a></pre><preclass="programlisting">#define <ahref="#VIR_USE_CPU">VIR_USE_CPU</a></pre><preclass="programlisting">#define <ahref="#VIR_UUID_BUFLEN">VIR_UUID_BUFLEN</a></pre><preclass="programlisting">#define <ahref="#VIR_UUID_STRING_BUFLEN">VIR_UUID_STRING_BUFLEN</a></pre><preclass="programlisting">Structure <ahref="#virConnect">virConnect</a><br/>struct _virConnect
<preclass="programlisting">unsigned int <ahref="#virDomainGetID">virDomainGetID</a> (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)</pre>
<preclass="programlisting">unsigned long <ahref="#virDomainGetMaxMemory">virDomainGetMaxMemory</a> (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)</pre>
<preclass="programlisting">int <ahref="#virNodeGetCellsFreeMemory">virNodeGetCellsFreeMemory</a> (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> unsigned long long * freeMems, <br/> int startCell, <br/> int maxCells)</pre>
<preclass="programlisting">unsigned long long <ahref="#virNodeGetFreeMemory">virNodeGetFreeMemory</a> (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)</pre>
<h3><aname="LIBVIR_VERSION_NUMBER"id="LIBVIR_VERSION_NUMBER"></a>Macro: LIBVIR_VERSION_NUMBER</h3><pre>#define LIBVIR_VERSION_NUMBER</pre><p>Macro providing the version of the library as version * 1,000,000 + minor * 1000 + micro</p>
<h3><aname="VIR_COPY_CPUMAP"id="VIR_COPY_CPUMAP"></a>Macro: VIR_COPY_CPUMAP</h3><pre>#define VIR_COPY_CPUMAP</pre><p>This macro is to be used in conjonction with virDomainGetVcpus() and virDomainPinVcpu() APIs. <ahref="libvirt-libvirt.html#VIR_COPY_CPUMAP">VIR_COPY_CPUMAP</a> macro extract the cpumap of the specified vcpu from cpumaps array and copy it into cpumap to be used later by virDomainPinVcpu() API.</p>
<h3><aname="VIR_CPU_MAPLEN"id="VIR_CPU_MAPLEN"></a>Macro: VIR_CPU_MAPLEN</h3><pre>#define VIR_CPU_MAPLEN</pre><p>This macro is to be used in conjonction with virDomainPinVcpu() API. It returns the length (in bytes) required to store the complete CPU map between a single virtual & all physical CPUs of a domain.</p>
<h3><aname="VIR_CPU_USABLE"id="VIR_CPU_USABLE"></a>Macro: VIR_CPU_USABLE</h3><pre>#define VIR_CPU_USABLE</pre><p>This macro is to be used in conjonction with virDomainGetVcpus() API. <ahref="libvirt-libvirt.html#VIR_CPU_USABLE">VIR_CPU_USABLE</a> macro returns a non zero value (true) if the cpu is usable by the vcpu, and 0 otherwise.</p>
<h3><aname="VIR_DOMAIN_SCHED_FIELD_LENGTH"id="VIR_DOMAIN_SCHED_FIELD_LENGTH"></a>Macro: VIR_DOMAIN_SCHED_FIELD_LENGTH</h3><pre>#define VIR_DOMAIN_SCHED_FIELD_LENGTH</pre><p>Macro providing the field length of <ahref="libvirt-libvirt.html#virSchedParameter">virSchedParameter</a></p>
<h3><aname="VIR_GET_CPUMAP"id="VIR_GET_CPUMAP"></a>Macro: VIR_GET_CPUMAP</h3><pre>#define VIR_GET_CPUMAP</pre><p>This macro is to be used in conjonction with virDomainGetVcpus() and virDomainPinVcpu() APIs. <ahref="libvirt-libvirt.html#VIR_GET_CPUMAP">VIR_GET_CPUMAP</a> macro returns a pointer to the cpumap of the specified vcpu from cpumaps array.</p>
<h3><aname="VIR_NODEINFO_MAXCPUS"id="VIR_NODEINFO_MAXCPUS"></a>Macro: VIR_NODEINFO_MAXCPUS</h3><pre>#define VIR_NODEINFO_MAXCPUS</pre><p>This macro is to calculate the total number of CPUs supported but not neccessarily active in the host.</p>
<h3><aname="VIR_UNUSE_CPU"id="VIR_UNUSE_CPU"></a>Macro: VIR_UNUSE_CPU</h3><pre>#define VIR_UNUSE_CPU</pre><p>This macro is to be used in conjonction with virDomainPinVcpu() API. USE_CPU macro reset the bit (CPU not usable) of the related cpu in cpumap.</p>
<h3><aname="VIR_USE_CPU"id="VIR_USE_CPU"></a>Macro: VIR_USE_CPU</h3><pre>#define VIR_USE_CPU</pre><p>This macro is to be used in conjonction with virDomainPinVcpu() API. USE_CPU macro set the bit (CPU usable) of the related cpu in cpumap.</p>
<h3><aname="VIR_UUID_BUFLEN"id="VIR_UUID_BUFLEN"></a>Macro: VIR_UUID_BUFLEN</h3><pre>#define VIR_UUID_BUFLEN</pre><p>This macro provides the length of the buffer required for virDomainGetUUID()</p>
<h3><aname="VIR_UUID_STRING_BUFLEN"id="VIR_UUID_STRING_BUFLEN"></a>Macro: VIR_UUID_STRING_BUFLEN</h3><pre>#define VIR_UUID_STRING_BUFLEN</pre><p>This macro provides the length of the buffer required for virDomainGetUUIDString()</p>
</pre><p>This function closes the connection to the Hypervisor. This should not be called if further interaction with the Hypervisor are needed especially if there is running domain which need further monitoring by the application.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success or -1 in case of error.</td></tr></tbody></table></div><h3><aname="virConnectGetCapabilities"id="virConnectGetCapabilities"></a>Function: virConnectGetCapabilities</h3><preclass="programlisting">char * virConnectGetCapabilities (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>Provides capabilities of the hypervisor / driver.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of error, or an XML string defining the capabilities. The client must free the returned string after use.</td></tr></tbody></table></div><h3><aname="virConnectGetHostname"id="virConnectGetHostname"></a>Function: virConnectGetHostname</h3><preclass="programlisting">char * virConnectGetHostname (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>This returns the system hostname on which the hypervisor is running (the result of the gethostname(2) system call). If we are connected to a remote system, then this returns the hostname of the remote system.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to a hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the hostname which must be freed by the caller, or NULL if there was an error.</td></tr></tbody></table></div><h3><aname="virConnectGetMaxVcpus"id="virConnectGetMaxVcpus"></a>Function: virConnectGetMaxVcpus</h3><preclass="programlisting">int virConnectGetMaxVcpus (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * type)<br/>
</pre><p>Provides the maximum number of virtual CPUs supported for a guest VM of a specific type. The 'type' parameter here corresponds to the 'type' attribute in the <domain> element of the XML.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>type</tt></i>:</span></td><td>value of the 'type' attribute in the <domain> element</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the maximum of virtual CPU or -1 in case of error.</td></tr></tbody></table></div><h3><aname="virConnectGetType"id="virConnectGetType"></a>Function: virConnectGetType</h3><preclass="programlisting">const char * virConnectGetType (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of error, a static zero terminated string otherwise. See also: http://www.redhat.com/archives/libvir-list/2007-February/msg00096.html</td></tr></tbody></table></div><h3><aname="virConnectGetURI"id="virConnectGetURI"></a>Function: virConnectGetURI</h3><preclass="programlisting">char * virConnectGetURI (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>This returns the URI (name) of the hypervisor connection. Normally this is the same as or similar to the string passed to the virConnectOpen/virConnectOpenReadOnly call, but the driver may make the URI canonical. If name == NULL was passed to virConnectOpen, then the driver will return a non-NULL URI which can be used to connect to the same hypervisor later.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to a hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the URI string which must be freed by the caller, or NULL if there was an error.</td></tr></tbody></table></div><h3><aname="virConnectGetVersion"id="virConnectGetVersion"></a>Function: virConnectGetVersion</h3><preclass="programlisting">int virConnectGetVersion (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> unsigned long * hvVer)<br/>
</pre><p>Get the version level of the Hypervisor running. This may work only with hypervisor call, i.e. with priviledged access to the hypervisor, not with a Read-Only connection.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>hvVer</tt></i>:</span></td><td>return value for the version of the running hypervisor (OUT)</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 otherwise. if the version can't be extracted by lack of capacities returns 0 and @hvVer is 0, otherwise @hvVer value is major * 1,000,000 + minor * 1,000 + release</td></tr></tbody></table></div><h3><aname="virConnectListDefinedDomains"id="virConnectListDefinedDomains"></a>Function: virConnectListDefinedDomains</h3><preclass="programlisting">int virConnectListDefinedDomains (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> char ** const names, <br/> int maxnames)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>names</tt></i>:</span></td><td>pointer to an array to store the names</td></tr><tr><td><spanclass="term"><i><tt>maxnames</tt></i>:</span></td><td>size of the array</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of names provided in the array or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectListDefinedNetworks"id="virConnectListDefinedNetworks"></a>Function: virConnectListDefinedNetworks</h3><preclass="programlisting">int virConnectListDefinedNetworks (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> char ** const names, <br/> int maxnames)<br/>
</pre><p>list the inactive networks, stores the pointers to the names in @names</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>names</tt></i>:</span></td><td>pointer to an array to store the names</td></tr><tr><td><spanclass="term"><i><tt>maxnames</tt></i>:</span></td><td>size of the array</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of names provided in the array or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectListDomains"id="virConnectListDomains"></a>Function: virConnectListDomains</h3><preclass="programlisting">int virConnectListDomains (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> int * ids, <br/> int maxids)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>ids</tt></i>:</span></td><td>array to collect the list of IDs of active domains</td></tr><tr><td><spanclass="term"><i><tt>maxids</tt></i>:</span></td><td>size of @ids</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of domain found or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectListNetworks"id="virConnectListNetworks"></a>Function: virConnectListNetworks</h3><preclass="programlisting">int virConnectListNetworks (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> char ** const names, <br/> int maxnames)<br/>
</pre><p>Collect the list of active networks, and store their names in @names</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>names</tt></i>:</span></td><td>array to collect the list of names of active networks</td></tr><tr><td><spanclass="term"><i><tt>maxnames</tt></i>:</span></td><td>size of @names</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of networks found or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectNumOfDefinedDomains"id="virConnectNumOfDefinedDomains"></a>Function: virConnectNumOfDefinedDomains</h3><preclass="programlisting">int virConnectNumOfDefinedDomains (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of domain found or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectNumOfDefinedNetworks"id="virConnectNumOfDefinedNetworks"></a>Function: virConnectNumOfDefinedNetworks</h3><preclass="programlisting">int virConnectNumOfDefinedNetworks (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>Provides the number of inactive networks.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of networks found or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectNumOfDomains"id="virConnectNumOfDomains"></a>Function: virConnectNumOfDomains</h3><preclass="programlisting">int virConnectNumOfDomains (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of domain found or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectNumOfNetworks"id="virConnectNumOfNetworks"></a>Function: virConnectNumOfNetworks</h3><preclass="programlisting">int virConnectNumOfNetworks (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>Provides the number of active networks.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of network found or -1 in case of error</td></tr></tbody></table></div><h3><aname="virConnectOpen"id="virConnectOpen"></a>Function: virConnectOpen</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> virConnectOpen (const char * name)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>name</tt></i>:</span></td><td>URI of the hypervisor</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the hypervisor connection or NULL in case of error URIs are documented at http://libvirt.org/uri.html</td></tr></tbody></table></div><h3><aname="virConnectOpenAuth"id="virConnectOpenAuth"></a>Function: virConnectOpenAuth</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> virConnectOpenAuth (const char * name, <br/><ahref="libvirt-libvirt.html#virConnectAuthPtr">virConnectAuthPtr</a> auth, <br/> int flags)<br/>
</pre><p>This function should be called first to get a connection to the Hypervisor. If neccessary, authentication will be performed fetching credentials via the callback</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>name</tt></i>:</span></td><td>URI of the hypervisor</td></tr><tr><td><spanclass="term"><i><tt>auth</tt></i>:</span></td><td>Authenticate callback parameters</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>Open flags</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the hypervisor connection or NULL in case of error URIs are documented at http://libvirt.org/uri.html</td></tr></tbody></table></div><h3><aname="virConnectOpenReadOnly"id="virConnectOpenReadOnly"></a>Function: virConnectOpenReadOnly</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> virConnectOpenReadOnly (const char * name)<br/>
</pre><p>This function should be called first to get a restricted connection to the libbrary functionalities. The set of APIs usable are then restricted on the available methods to control the domains.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>name</tt></i>:</span></td><td>URI of the hypervisor</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the hypervisor connection or NULL in case of error URIs are documented at http://libvirt.org/uri.html</td></tr></tbody></table></div><h3><aname="virDomainAttachDevice"id="virDomainAttachDevice"></a>Function: virDomainAttachDevice</h3><preclass="programlisting">int virDomainAttachDevice (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> const char * xml)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><spanclass="term"><i><tt>xml</tt></i>:</span></td><td>pointer to XML description of one device</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainBlockStats"id="virDomainBlockStats"></a>Function: virDomainBlockStats</h3><preclass="programlisting">int virDomainBlockStats (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> dom, <br/> const char * path, <br/><ahref="libvirt-libvirt.html#virDomainBlockStatsPtr">virDomainBlockStatsPtr</a> stats, <br/> size_t size)<br/>
</pre><p>This function returns block device (disk) stats for block devices attached to the domain. The path parameter is the name of the block device. Get this by calling <ahref="libvirt-libvirt.html#virDomainGetXMLDesc">virDomainGetXMLDesc</a> and finding the <target dev='...'> attribute within //domain/devices/disk. (For example, "xvda"). Domains may have more than one block device. To get stats for each you should make multiple calls to this function. Individual fields within the stats structure may be returned as -1, which indicates that the hypervisor does not support that particular statistic.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>dom</tt></i>:</span></td><td>pointer to the domain object</td></tr><tr><td><spanclass="term"><i><tt>path</tt></i>:</span></td><td>path to the block device</td></tr><tr><td><spanclass="term"><i><tt>stats</tt></i>:</span></td><td>block device stats (returned)</td></tr><tr><td><spanclass="term"><i><tt>size</tt></i>:</span></td><td>size of stats structure</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success or -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainCoreDump"id="virDomainCoreDump"></a>Function: virDomainCoreDump</h3><preclass="programlisting">int virDomainCoreDump (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> const char * to, <br/> int flags)<br/>
</pre><p>This method will dump the core of a domain on a given file for analysis. Note that for remote Xen Daemon the file path will be interpreted in the remote host.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>to</tt></i>:</span></td><td>path for the core file</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>extra flags, currently unused</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainCreate"id="virDomainCreate"></a>Function: virDomainCreate</h3><preclass="programlisting">int virDomainCreate (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>launch a defined domain. If the call succeed the domain moves from the defined to the running domains pools.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to a defined domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div><h3><aname="virDomainCreateLinux"id="virDomainCreateLinux"></a>Function: virDomainCreateLinux</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainCreateLinux (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xmlDesc, <br/> unsigned int flags)<br/>
</pre><p>Launch a new Linux guest domain, based on an XML description similar to the one returned by virDomainGetXMLDesc() This function may requires priviledged access to the hypervisor.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>xmlDesc</tt></i>:</span></td><td>an XML description of the domain</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>an optional set of virDomainFlags</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure</td></tr></tbody></table></div><h3><aname="virDomainDefineXML"id="virDomainDefineXML"></a>Function: virDomainDefineXML</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainDefineXML (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xml)<br/>
</pre><p>define a domain, but does not start it</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>xml</tt></i>:</span></td><td>the XML description for the domain, preferably in UTF-8</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of error, a pointer to the domain otherwise</td></tr></tbody></table></div><h3><aname="virDomainDestroy"id="virDomainDestroy"></a>Function: virDomainDestroy</h3><preclass="programlisting">int virDomainDestroy (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Destroy the domain object. The running instance is shutdown if not down already and all resources used by it are given back to the hypervisor. The data structure is freed and should not be used thereafter if the call does not return an error. This function may requires priviledged access</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainDetachDevice"id="virDomainDetachDevice"></a>Function: virDomainDetachDevice</h3><preclass="programlisting">int virDomainDetachDevice (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> const char * xml)<br/>
</pre><p>Destroy a virtual device attachment to backend.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><spanclass="term"><i><tt>xml</tt></i>:</span></td><td>pointer to XML description of one device</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainFree"id="virDomainFree"></a>Function: virDomainFree</h3><preclass="programlisting">int virDomainFree (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainGetAutostart"id="virDomainGetAutostart"></a>Function: virDomainGetAutostart</h3><preclass="programlisting">int virDomainGetAutostart (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> int * autostart)<br/>
</pre><p>Provides a boolean value indicating whether the domain configured to be automatically started when the host machine boots.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>autostart</tt></i>:</span></td><td>the value returned</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virDomainGetConnect"id="virDomainGetConnect"></a>Function: virDomainGetConnect</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> virDomainGetConnect (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> dom)<br/>
</pre><p>Provides the connection pointer associated with a domain. The reference counter on the connection is not increased by this call. WARNING: When writing libvirt bindings in other languages, do not use this function. Instead, store the connection and the domain object together.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>dom</tt></i>:</span></td><td>pointer to a domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the <ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> or NULL in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainGetID"id="virDomainGetID"></a>Function: virDomainGetID</h3><preclass="programlisting">unsigned int virDomainGetID (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Get the hypervisor ID number for the domain</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the domain ID number or (unsigned int) -1 in case of error</td></tr></tbody></table></div><h3><aname="virDomainGetInfo"id="virDomainGetInfo"></a>Function: virDomainGetInfo</h3><preclass="programlisting">int virDomainGetInfo (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/><ahref="libvirt-libvirt.html#virDomainInfoPtr">virDomainInfoPtr</a> info)<br/>
</pre><p>Extract information about a domain. Note that if the connection used to get the domain is limited only a partial set of the information can be extracted.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>info</tt></i>:</span></td><td>pointer to a <ahref="libvirt-libvirt.html#virDomainInfo">virDomainInfo</a> structure allocated by the user</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainGetMaxMemory"id="virDomainGetMaxMemory"></a>Function: virDomainGetMaxMemory</h3><preclass="programlisting">unsigned long virDomainGetMaxMemory (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Retrieve the maximum amount of physical memory allocated to a domain. If domain is NULL, then this get the amount of memory reserved to Domain0 i.e. the domain where the application runs.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object or NULL</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the memory size in kilobytes or 0 in case of error.</td></tr></tbody></table></div><h3><aname="virDomainGetMaxVcpus"id="virDomainGetMaxVcpus"></a>Function: virDomainGetMaxVcpus</h3><preclass="programlisting">int virDomainGetMaxVcpus (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Provides the maximum number of virtual CPUs supported for the guest VM. If the guest is inactive, this is basically the same as virConnectGetMaxVcpus. If the guest is running this will reflect the maximum number of virtual CPUs the guest was booted with.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the maximum of virtual CPU or -1 in case of error.</td></tr></tbody></table></div><h3><aname="virDomainGetName"id="virDomainGetName"></a>Function: virDomainGetName</h3><preclass="programlisting">const char * virDomainGetName (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the name or NULL, the string need not be deallocated its lifetime will be the same as the domain object.</td></tr></tbody></table></div><h3><aname="virDomainGetOSType"id="virDomainGetOSType"></a>Function: virDomainGetOSType</h3><preclass="programlisting">char * virDomainGetOSType (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Get the type of domain operation system.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the new string or NULL in case of error, the string must be freed by the caller.</td></tr></tbody></table></div><h3><aname="virDomainGetSchedulerParameters"id="virDomainGetSchedulerParameters"></a>Function: virDomainGetSchedulerParameters</h3><preclass="programlisting">int virDomainGetSchedulerParameters (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/><ahref="libvirt-libvirt.html#virSchedParameterPtr">virSchedParameterPtr</a> params, <br/> int * nparams)<br/>
</pre><p>Get the scheduler parameters, the @params array will be filled with the values.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><spanclass="term"><i><tt>params</tt></i>:</span></td><td>pointer to scheduler parameter object (return value)</td></tr><tr><td><spanclass="term"><i><tt>nparams</tt></i>:</span></td><td>pointer to number of scheduler parameter (this value should be same than the returned value nparams of virDomainGetSchedulerType)</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success.</td></tr></tbody></table></div><h3><aname="virDomainGetSchedulerType"id="virDomainGetSchedulerType"></a>Function: virDomainGetSchedulerType</h3><preclass="programlisting">char * virDomainGetSchedulerType (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> int * nparams)<br/>
</pre><p>Get the scheduler type.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><spanclass="term"><i><tt>nparams</tt></i>:</span></td><td>number of scheduler parameters(return value)</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of error. The caller must free the returned string.</td></tr></tbody></table></div><h3><aname="virDomainGetUUID"id="virDomainGetUUID"></a>Function: virDomainGetUUID</h3><preclass="programlisting">int virDomainGetUUID (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned char * uuid)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>uuid</tt></i>:</span></td><td>pointer to a <ahref="libvirt-libvirt.html#VIR_UUID_BUFLEN">VIR_UUID_BUFLEN</a> bytes array</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virDomainGetUUIDString"id="virDomainGetUUIDString"></a>Function: virDomainGetUUIDString</h3><preclass="programlisting">int virDomainGetUUIDString (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * buf)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>buf</tt></i>:</span></td><td>pointer to a <ahref="libvirt-libvirt.html#VIR_UUID_STRING_BUFLEN">VIR_UUID_STRING_BUFLEN</a> bytes array</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virDomainGetVcpus"id="virDomainGetVcpus"></a>Function: virDomainGetVcpus</h3><preclass="programlisting">int virDomainGetVcpus (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/><ahref="libvirt-libvirt.html#virVcpuInfoPtr">virVcpuInfoPtr</a> info, <br/> int maxinfo, <br/> unsigned char * cpumaps, <br/> int maplen)<br/>
</pre><p>Extract information about virtual CPUs of domain, store it in info array and also in cpumaps if this pointer is'nt NULL.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object, or NULL for Domain0</td></tr><tr><td><spanclass="term"><i><tt>info</tt></i>:</span></td><td>pointer to an array of <ahref="libvirt-libvirt.html#virVcpuInfo">virVcpuInfo</a> structures (OUT)</td></tr><tr><td><spanclass="term"><i><tt>maxinfo</tt></i>:</span></td><td>number of structures in info array</td></tr><tr><td><spanclass="term"><i><tt>cpumaps</tt></i>:</span></td><td>pointer to an bit map of real CPUs for all vcpus of this domain (in 8-bit bytes) (OUT) If cpumaps is NULL, then no cupmap information is returned by the API. It's assumed there is <maxinfo> cpumap in cpumaps array. The memory allocated to cpumaps must be (maxinfo * maplen) bytes (ie: calloc(maxinfo, maplen)). One cpumap inside cpumaps has the format described in virDomainPinVcpu() API.</td></tr><tr><td><spanclass="term"><i><tt>maplen</tt></i>:</span></td><td>number of bytes in one cpumap, from 1 up to size of CPU map in underlying virtualization system (Xen...).</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of info filled in case of success, -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainGetXMLDesc"id="virDomainGetXMLDesc"></a>Function: virDomainGetXMLDesc</h3><preclass="programlisting">char * virDomainGetXMLDesc (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> int flags)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>an OR'ed set of <ahref="libvirt-libvirt.html#virDomainXMLFlags">virDomainXMLFlags</a></td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a 0 terminated UTF-8 encoded XML instance, or NULL in case of error. the caller must free() the returned value.</td></tr></tbody></table></div><h3><aname="virDomainInterfaceStats"id="virDomainInterfaceStats"></a>Function: virDomainInterfaceStats</h3><preclass="programlisting">int virDomainInterfaceStats (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> dom, <br/> const char * path, <br/><ahref="libvirt-libvirt.html#virDomainInterfaceStatsPtr">virDomainInterfaceStatsPtr</a> stats, <br/> size_t size)<br/>
</pre><p>This function returns network interface stats for interfaces attached to the domain. The path parameter is the name of the network interface. Domains may have more than network interface. To get stats for each you should make multiple calls to this function. Individual fields within the stats structure may be returned as -1, which indicates that the hypervisor does not support that particular statistic.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>dom</tt></i>:</span></td><td>pointer to the domain object</td></tr><tr><td><spanclass="term"><i><tt>path</tt></i>:</span></td><td>path to the interface</td></tr><tr><td><spanclass="term"><i><tt>stats</tt></i>:</span></td><td>network interface stats (returned)</td></tr><tr><td><spanclass="term"><i><tt>size</tt></i>:</span></td><td>size of stats structure</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success or -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainLookupByID"id="virDomainLookupByID"></a>Function: virDomainLookupByID</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByID (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> int id)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>id</tt></i>:</span></td><td>the domain ID number</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure. If the domain cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_DOMAIN">VIR_ERR_NO_DOMAIN</a> error is raised.</td></tr></tbody></table></div><h3><aname="virDomainLookupByName"id="virDomainLookupByName"></a>Function: virDomainLookupByName</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByName (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * name)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>name</tt></i>:</span></td><td>name for the domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure. If the domain cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_DOMAIN">VIR_ERR_NO_DOMAIN</a> error is raised.</td></tr></tbody></table></div><h3><aname="virDomainLookupByUUID"id="virDomainLookupByUUID"></a>Function: virDomainLookupByUUID</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByUUID (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const unsigned char * uuid)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>uuid</tt></i>:</span></td><td>the raw UUID for the domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure. If the domain cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_DOMAIN">VIR_ERR_NO_DOMAIN</a> error is raised.</td></tr></tbody></table></div><h3><aname="virDomainLookupByUUIDString"id="virDomainLookupByUUIDString"></a>Function: virDomainLookupByUUIDString</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByUUIDString (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * uuidstr)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>uuidstr</tt></i>:</span></td><td>the string UUID for the domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure. If the domain cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_DOMAIN">VIR_ERR_NO_DOMAIN</a> error is raised.</td></tr></tbody></table></div><h3><aname="virDomainMigrate"id="virDomainMigrate"></a>Function: virDomainMigrate</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainMigrate (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/><ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> dconn, <br/> unsigned long flags, <br/> const char * dname, <br/> const char * uri, <br/> unsigned long bandwidth)<br/>
</pre><p>Migrate the domain object from its current host to the destination host given by dconn (a connection to the destination host). Flags may be one of more of the following: <ahref="libvirt-libvirt.html#VIR_MIGRATE_LIVE">VIR_MIGRATE_LIVE</a> Attempt a live migration. If a hypervisor supports renaming domains during migration, then you may set the dname parameter to the new name (otherwise it keeps the same name). If this is not supported by the hypervisor, dname must be NULL or else you will get an error. Since typically the two hypervisors connect directly to each other in order to perform the migration, you may need to specify a path from the source to the destination. This is the purpose of the uri parameter. If uri is NULL, then libvirt will try to find the best method. Uri may specify the hostname or IP address of the destination host as seen from the source. Or uri may be a URI giving transport, hostname, user, port, etc. in the usual form. Refer to driver documentation for the particular URIs supported. The maximum bandwidth (in Mbps) that will be used to do migration can be specified with the bandwidth parameter. If set to 0, libvirt will choose a suitable default. Some hypervisors do not support this feature and will return an error if bandwidth is not 0. To see which features are supported by the current hypervisor, see virConnectGetCapabilities, /capabilities/host/migration_features. There are many limitations on migration imposed by the underlying technology - for example it may not be possible to migrate between different processors even with the same architecture, or between different types of hypervisor.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>dconn</tt></i>:</span></td><td>destination host (a connection object)</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>flags</td></tr><tr><td><spanclass="term"><i><tt>dname</tt></i>:</span></td><td>(optional) rename domain to this at destination</td></tr><tr><td><spanclass="term"><i><tt>uri</tt></i>:</span></td><td>(optional) dest hostname/URI as seen from the source host</td></tr><tr><td><spanclass="term"><i><tt>bandwidth</tt></i>:</span></td><td>(optional) specify migration bandwidth limit in Mbps</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the new domain object if the migration was successful, or NULL in case of error. Note that the new domain object exists in the scope of the destination connection (dconn).</td></tr></tbody></table></div><h3><aname="virDomainPinVcpu"id="virDomainPinVcpu"></a>Function: virDomainPinVcpu</h3><preclass="programlisting">int virDomainPinVcpu (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned int vcpu, <br/> unsigned char * cpumap, <br/> int maplen)<br/>
</pre><p>Dynamically change the real CPUs which can be allocated to a virtual CPU. This function requires priviledged access to the hypervisor.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object, or NULL for Domain0</td></tr><tr><td><spanclass="term"><i><tt>vcpu</tt></i>:</span></td><td>virtual CPU number</td></tr><tr><td><spanclass="term"><i><tt>cpumap</tt></i>:</span></td><td>pointer to a bit map of real CPUs (in 8-bit bytes) (IN) Each bit set to 1 means that corresponding CPU is usable. Bytes are stored in little-endian order: CPU0-7, 8-15... In each byte, lowest CPU number is least significant bit.</td></tr><tr><td><spanclass="term"><i><tt>maplen</tt></i>:</span></td><td>number of bytes in cpumap, from 1 up to size of CPU map in underlying virtualization system (Xen...). If maplen < size, missing bytes are set to zero. If maplen > size, failure code is returned.</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainReboot"id="virDomainReboot"></a>Function: virDomainReboot</h3><preclass="programlisting">int virDomainReboot (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned int flags)<br/>
</pre><p>Reboot a domain, the domain object is still usable there after but the domain OS is being stopped for a restart. Note that the guest OS may ignore the request.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>extra flags for the reboot operation, not used yet</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainRestore"id="virDomainRestore"></a>Function: virDomainRestore</h3><preclass="programlisting">int virDomainRestore (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * from)<br/>
</pre><p>This method will restore a domain saved to disk by virDomainSave().</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>from</tt></i>:</span></td><td>path to the</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainResume"id="virDomainResume"></a>Function: virDomainResume</h3><preclass="programlisting">int virDomainResume (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Resume an suspended domain, the process is restarted from the state where it was frozen by calling virSuspendDomain(). This function may requires priviledged access</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainSave"id="virDomainSave"></a>Function: virDomainSave</h3><preclass="programlisting">int virDomainSave (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> const char * to)<br/>
</pre><p>This method will suspend a domain and save its memory contents to a file on disk. After the call, if successful, the domain is not listed as running anymore (this may be a problem). Use virDomainRestore() to restore a domain after saving.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>to</tt></i>:</span></td><td>path for the output file</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainSetAutostart"id="virDomainSetAutostart"></a>Function: virDomainSetAutostart</h3><preclass="programlisting">int virDomainSetAutostart (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> int autostart)<br/>
</pre><p>Configure the domain to be automatically started when the host machine boots.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>autostart</tt></i>:</span></td><td>whether the domain should be automatically started 0 or 1</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virDomainSetMaxMemory"id="virDomainSetMaxMemory"></a>Function: virDomainSetMaxMemory</h3><preclass="programlisting">int virDomainSetMaxMemory (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned long memory)<br/>
</pre><p>Dynamically change the maximum amount of physical memory allocated to a domain. If domain is NULL, then this change the amount of memory reserved to Domain0 i.e. the domain where the application runs. This function requires priviledged access to the hypervisor.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object or NULL</td></tr><tr><td><spanclass="term"><i><tt>memory</tt></i>:</span></td><td>the memory size in kilobytes</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainSetMemory"id="virDomainSetMemory"></a>Function: virDomainSetMemory</h3><preclass="programlisting">int virDomainSetMemory (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned long memory)<br/>
</pre><p>Dynamically change the target amount of physical memory allocated to a domain. If domain is NULL, then this change the amount of memory reserved to Domain0 i.e. the domain where the application runs. This function may requires priviledged access to the hypervisor.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object or NULL</td></tr><tr><td><spanclass="term"><i><tt>memory</tt></i>:</span></td><td>the memory size in kilobytes</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainSetSchedulerParameters"id="virDomainSetSchedulerParameters"></a>Function: virDomainSetSchedulerParameters</h3><preclass="programlisting">int virDomainSetSchedulerParameters (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/><ahref="libvirt-libvirt.html#virSchedParameterPtr">virSchedParameterPtr</a> params, <br/> int nparams)<br/>
</pre><p>Change the scheduler parameters</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><spanclass="term"><i><tt>params</tt></i>:</span></td><td>pointer to scheduler parameter objects</td></tr><tr><td><spanclass="term"><i><tt>nparams</tt></i>:</span></td><td>number of scheduler parameter (this value should be same or less than the returned value nparams of virDomainGetSchedulerType)</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success.</td></tr></tbody></table></div><h3><aname="virDomainSetVcpus"id="virDomainSetVcpus"></a>Function: virDomainSetVcpus</h3><preclass="programlisting">int virDomainSetVcpus (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned int nvcpus)<br/>
</pre><p>Dynamically change the number of virtual CPUs used by the domain. Note that this call may fail if the underlying virtualization hypervisor does not support it or if growing the number is arbitrary limited. This function requires priviledged access to the hypervisor.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object, or NULL for Domain0</td></tr><tr><td><spanclass="term"><i><tt>nvcpus</tt></i>:</span></td><td>the new number of virtual CPUs for this domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainShutdown"id="virDomainShutdown"></a>Function: virDomainShutdown</h3><preclass="programlisting">int virDomainShutdown (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Shutdown a domain, the domain object is still usable there after but the domain OS is being stopped. Note that the guest OS may ignore the request. TODO: should we add an option for reboot, knowing it may not be doable in the general case ?</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainSuspend"id="virDomainSuspend"></a>Function: virDomainSuspend</h3><preclass="programlisting">int virDomainSuspend (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Suspends an active domain, the process is frozen without further access to CPU resources and I/O but the memory used by the domain at the hypervisor level will stay allocated. Use virDomainResume() to reactivate the domain. This function may requires priviledged access.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virDomainUndefine"id="virDomainUndefine"></a>Function: virDomainUndefine</h3><preclass="programlisting">int virDomainUndefine (<ahref="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>undefine a domain but does not stop it if it is running</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>domain</tt></i>:</span></td><td>pointer to a defined domain</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div><h3><aname="virGetVersion"id="virGetVersion"></a>Function: virGetVersion</h3><preclass="programlisting">int virGetVersion (unsigned long * libVer, <br/> const char * type, <br/> unsigned long * typeVer)<br/>
</pre><p>Provides two information back, @libVer is the version of the library while @typeVer will be the version of the hypervisor type @type against which the library was compiled. If @type is NULL, "Xen" is assumed, if @type is unknown or not availble, an error code will be returned and @typeVer will be 0.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>libVer</tt></i>:</span></td><td>return value for the library version (OUT)</td></tr><tr><td><spanclass="term"><i><tt>type</tt></i>:</span></td><td>the type of connection/driver looked at</td></tr><tr><td><spanclass="term"><i><tt>typeVer</tt></i>:</span></td><td>return value for the version of the hypervisor (OUT)</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of failure, 0 otherwise, and values for @libVer and @typeVer have the format major * 1,000,000 + minor * 1,000 + release.</td></tr></tbody></table></div><h3><aname="virInitialize"id="virInitialize"></a>Function: virInitialize</h3><preclass="programlisting">int virInitialize (void)<br/>
</pre><p>Initialize the library. It's better to call this routine at startup in multithreaded applications to avoid potential race when initializing the library.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div><h3><aname="virNetworkCreate"id="virNetworkCreate"></a>Function: virNetworkCreate</h3><preclass="programlisting">int virNetworkCreate (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network)<br/>
</pre><p>Create and start a defined network. If the call succeed the network moves from the defined to the running networks pools.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>pointer to a defined network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div><h3><aname="virNetworkCreateXML"id="virNetworkCreateXML"></a>Function: virNetworkCreateXML</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> virNetworkCreateXML (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xmlDesc)<br/>
</pre><p>Create and start a new virtual network, based on an XML description similar to the one returned by virNetworkGetXMLDesc()</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>xmlDesc</tt></i>:</span></td><td>an XML description of the network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new network object or NULL in case of failure</td></tr></tbody></table></div><h3><aname="virNetworkDefineXML"id="virNetworkDefineXML"></a>Function: virNetworkDefineXML</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> virNetworkDefineXML (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xml)<br/>
</pre><p>Define a network, but does not create it</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>xml</tt></i>:</span></td><td>the XML description for the network, preferably in UTF-8</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of error, a pointer to the network otherwise</td></tr></tbody></table></div><h3><aname="virNetworkDestroy"id="virNetworkDestroy"></a>Function: virNetworkDestroy</h3><preclass="programlisting">int virNetworkDestroy (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network)<br/>
</pre><p>Destroy the network object. The running instance is shutdown if not down already and all resources used by it are given back to the hypervisor. The data structure is freed and should not be used thereafter if the call does not return an error. This function may requires priviledged access</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virNetworkFree"id="virNetworkFree"></a>Function: virNetworkFree</h3><preclass="programlisting">int virNetworkFree (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network)<br/>
</pre><p>Free the network object. The running instance is kept alive. The data structure is freed and should not be used thereafter.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div><h3><aname="virNetworkGetAutostart"id="virNetworkGetAutostart"></a>Function: virNetworkGetAutostart</h3><preclass="programlisting">int virNetworkGetAutostart (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network, <br/> int * autostart)<br/>
</pre><p>Provides a boolean value indicating whether the network configured to be automatically started when the host machine boots.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>autostart</tt></i>:</span></td><td>the value returned</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virNetworkGetBridgeName"id="virNetworkGetBridgeName"></a>Function: virNetworkGetBridgeName</h3><preclass="programlisting">char * virNetworkGetBridgeName (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network)<br/>
</pre><p>Provides a bridge interface name to which a domain may connect a network interface in order to join the network.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a 0 terminated interface name, or NULL in case of error. the caller must free() the returned value.</td></tr></tbody></table></div><h3><aname="virNetworkGetConnect"id="virNetworkGetConnect"></a>Function: virNetworkGetConnect</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> virNetworkGetConnect (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> net)<br/>
</pre><p>Provides the connection pointer associated with a network. The reference counter on the connection is not increased by this call. WARNING: When writing libvirt bindings in other languages, do not use this function. Instead, store the connection and the network object together.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>net</tt></i>:</span></td><td>pointer to a network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the <ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> or NULL in case of failure.</td></tr></tbody></table></div><h3><aname="virNetworkGetName"id="virNetworkGetName"></a>Function: virNetworkGetName</h3><preclass="programlisting">const char * virNetworkGetName (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the name or NULL, the string need not be deallocated its lifetime will be the same as the network object.</td></tr></tbody></table></div><h3><aname="virNetworkGetUUID"id="virNetworkGetUUID"></a>Function: virNetworkGetUUID</h3><preclass="programlisting">int virNetworkGetUUID (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network, <br/> unsigned char * uuid)<br/>
</pre><p>Get the UUID for a network</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>uuid</tt></i>:</span></td><td>pointer to a <ahref="libvirt-libvirt.html#VIR_UUID_BUFLEN">VIR_UUID_BUFLEN</a> bytes array</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virNetworkGetUUIDString"id="virNetworkGetUUIDString"></a>Function: virNetworkGetUUIDString</h3><preclass="programlisting">int virNetworkGetUUIDString (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network, <br/> char * buf)<br/>
</pre><p>Get the UUID for a network as string. For more information about UUID see RFC4122.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>buf</tt></i>:</span></td><td>pointer to a <ahref="libvirt-libvirt.html#VIR_UUID_STRING_BUFLEN">VIR_UUID_STRING_BUFLEN</a> bytes array</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virNetworkGetXMLDesc"id="virNetworkGetXMLDesc"></a>Function: virNetworkGetXMLDesc</h3><preclass="programlisting">char * virNetworkGetXMLDesc (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network, <br/> int flags)<br/>
</pre><p>Provide an XML description of the network. The description may be reused later to relaunch the network with virNetworkCreateXML().</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>flags</tt></i>:</span></td><td>and OR'ed set of extraction flags, not used yet</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a 0 terminated UTF-8 encoded XML instance, or NULL in case of error. the caller must free() the returned value.</td></tr></tbody></table></div><h3><aname="virNetworkLookupByName"id="virNetworkLookupByName"></a>Function: virNetworkLookupByName</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> virNetworkLookupByName (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * name)<br/>
</pre><p>Try to lookup a network on the given hypervisor based on its name.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>name</tt></i>:</span></td><td>name for the network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new network object or NULL in case of failure. If the network cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_NETWORK">VIR_ERR_NO_NETWORK</a> error is raised.</td></tr></tbody></table></div><h3><aname="virNetworkLookupByUUID"id="virNetworkLookupByUUID"></a>Function: virNetworkLookupByUUID</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> virNetworkLookupByUUID (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const unsigned char * uuid)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>uuid</tt></i>:</span></td><td>the raw UUID for the network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new network object or NULL in case of failure. If the network cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_NETWORK">VIR_ERR_NO_NETWORK</a> error is raised.</td></tr></tbody></table></div><h3><aname="virNetworkLookupByUUIDString"id="virNetworkLookupByUUIDString"></a>Function: virNetworkLookupByUUIDString</h3><preclass="programlisting"><ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> virNetworkLookupByUUIDString (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * uuidstr)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>uuidstr</tt></i>:</span></td><td>the string UUID for the network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>a new network object or NULL in case of failure. If the network cannot be found, then <ahref="libvirt-virterror.html#VIR_ERR_NO_NETWORK">VIR_ERR_NO_NETWORK</a> error is raised.</td></tr></tbody></table></div><h3><aname="virNetworkSetAutostart"id="virNetworkSetAutostart"></a>Function: virNetworkSetAutostart</h3><preclass="programlisting">int virNetworkSetAutostart (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network, <br/> int autostart)<br/>
</pre><p>Configure the network to be automatically started when the host machine boots.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>a network object</td></tr><tr><td><spanclass="term"><i><tt>autostart</tt></i>:</span></td><td>whether the network should be automatically started 0 or 1</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div><h3><aname="virNetworkUndefine"id="virNetworkUndefine"></a>Function: virNetworkUndefine</h3><preclass="programlisting">int virNetworkUndefine (<ahref="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> network)<br/>
</pre><p>Undefine a network but does not stop it if it is running</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>network</tt></i>:</span></td><td>pointer to a defined network</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div><h3><aname="virNodeGetCellsFreeMemory"id="virNodeGetCellsFreeMemory"></a>Function: virNodeGetCellsFreeMemory</h3><preclass="programlisting">int virNodeGetCellsFreeMemory (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> unsigned long long * freeMems, <br/> int startCell, <br/> int maxCells)<br/>
</pre><p>This call returns the amount of free memory in one or more NUMA cells. The @freeMems array must be allocated by the caller and will be filled with the amount of free memory in kilobytes for each cell requested, starting with startCell (in freeMems[0]), up to either (startCell + maxCells), or the number of additional cells in the node, whichever is smaller.</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>freeMems</tt></i>:</span></td><td>pointer to the array of unsigned long long</td></tr><tr><td><spanclass="term"><i><tt>startCell</tt></i>:</span></td><td>index of first cell to return freeMems info on.</td></tr><tr><td><spanclass="term"><i><tt>maxCells</tt></i>:</span></td><td>Maximum number of cells for which freeMems information can be returned.</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the number of entries filled in freeMems, or -1 in case of error.</td></tr></tbody></table></div><h3><aname="virNodeGetFreeMemory"id="virNodeGetFreeMemory"></a>Function: virNodeGetFreeMemory</h3><preclass="programlisting">unsigned long long virNodeGetFreeMemory (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>provides the free memory availble on the Node</p>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>the available free memory in kilobytes or 0 in case of error</td></tr></tbody></table></div><h3><aname="virNodeGetInfo"id="virNodeGetInfo"></a>Function: virNodeGetInfo</h3><preclass="programlisting">int virNodeGetInfo (<ahref="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/><ahref="libvirt-libvirt.html#virNodeInfoPtr">virNodeInfoPtr</a> info)<br/>
<divclass="variablelist"><tableborder="0"><colalign="left"/><tbody><tr><td><spanclass="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><spanclass="term"><i><tt>info</tt></i>:</span></td><td>pointer to a <ahref="libvirt-libvirt.html#virNodeInfo">virNodeInfo</a> structure allocated by the user</td></tr><tr><td><spanclass="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success and -1 in case of failure.</td></tr></tbody></table></div></div></div><divclass="linkList2"><divclass="llinks2"><h3class="links2"><span>main menu</span></h3><ul><li><ahref="../index.html">Home</a></li><li><ahref="../html/index.html">API Menu</a></li><li><ahref="../examples/index.html">C code examples</a></li><li><ahref="../ChangeLog.html">Recent Changes</a></li></ul></div><divclass="llinks2"><h3class="links2"><span>related links</span></h3><ul><li><ahref="https://www.redhat.com/archives/libvir-list/">Mail archive</a></li><li><ahref="https://bugzilla.redhat.com/bugzilla/buglist.cgi?product=Fedora+Core&component=libvirt&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=MODIFIED&short_desc_type=allwordssubstr&short_desc=&long_desc_type=allwordssubstr">Open bugs</a></li><li><ahref="http://virt-manager.et.redhat.com/">virt-manager</a></li><li><ahref="http://search.cpan.org/~danberr/Sys-Virt-0.1.0/">Perl bindings</a></li><li><ahref="http://libvirt.org/ocaml/">OCaml bindings</a></li><li><ahref="http://libvirt.org/ruby/">Ruby bindings</a></li><li><ahref="http://www.cl.cam.ac.uk/Research/SRG/netos/xen/index.html">Xen project</a></li><li><formaction="../search.php"enctype="application/x-www-form-urlencoded"method="get"><inputname="query"type="text"size="12"value="Search..."/><inputname="submit"type="submit"value="Go"/></form></li><li><ahref="http://xmlsoft.org/"><imgsrc="../Libxml2-Logo-90x34.gif"alt="Made with Libxml2 Logo"/></a></li></ul><pclass="credits">Graphics and design by <ahref="mail:dfong@redhat.com">Diana Fong</a></p></div></div><divid="bottom"><pclass="p1"></p></div></div></body></html>
