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<h2>
<span class="refentrytitle">libvirt</span>
</h2>
<p>libvirt - core interfaces for the libvirt library</p>
<p>Provides the interfaces of the libvirt library to handle Xen domains from a process running in domain 0 </p>
<p>Author(s): Daniel Veillard &lt;veillard@redhat.com&gt; </p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">#define <a href="#VIR_NODEINFO_MAXCPUS">VIR_NODEINFO_MAXCPUS</a>(nodeinfo);
#define <a href="#LIBVIR_VERSION_NUMBER">LIBVIR_VERSION_NUMBER</a>;
#define <a href="#VIR_USE_CPU">VIR_USE_CPU</a>(cpumap, cpu);
#define <a href="#VIR_CPU_MAPLEN">VIR_CPU_MAPLEN</a>(cpu);
#define <a href="#VIR_CPU_USABLE">VIR_CPU_USABLE</a>(cpumaps, maplen, vcpu, cpu);
#define <a href="#VIR_COPY_CPUMAP">VIR_COPY_CPUMAP</a>(cpumaps, maplen, vcpu, cpumap);
#define <a href="#VIR_GET_CPUMAP">VIR_GET_CPUMAP</a>(cpumaps, maplen, vcpu);
#define <a href="#VIR_UNUSE_CPU">VIR_UNUSE_CPU</a>(cpumap, cpu);
typedef <a href="libvirt-libvirt.html#virNodeInfo">virNodeInfo</a> * <a href="#virNodeInfoPtr">virNodeInfoPtr</a>;
typedef <a href="libvirt-libvirt.html#virDomainInfo">virDomainInfo</a> * <a href="#virDomainInfoPtr">virDomainInfoPtr</a>;
typedef <a href="libvirt-libvirt.html#virDomainKernel">virDomainKernel</a> * <a href="#virDomainKernelPtr">virDomainKernelPtr</a>;
typedef <a href="libvirt-libvirt.html#virConnect">virConnect</a> * <a href="#virConnectPtr">virConnectPtr</a>;
typedef struct _virDomainKernel <a href="#virDomainKernel">virDomainKernel</a>;
typedef struct _virNodeInfo <a href="#virNodeInfo">virNodeInfo</a>;
typedef enum <a href="#virDomainState">virDomainState</a>;
typedef enum <a href="#virDeviceMode">virDeviceMode</a>;
typedef struct _virDomain <a href="#virDomain">virDomain</a>;
typedef <a href="libvirt-libvirt.html#virDomain">virDomain</a> * <a href="#virDomainPtr">virDomainPtr</a>;
typedef struct _virVcpuInfo <a href="#virVcpuInfo">virVcpuInfo</a>;
typedef <a href="libvirt-libvirt.html#virVcpuInfo">virVcpuInfo</a> * <a href="#virVcpuInfoPtr">virVcpuInfoPtr</a>;
typedef enum <a href="#virDomainRestart">virDomainRestart</a>;
typedef struct _virConnect <a href="#virConnect">virConnect</a>;
typedef enum <a href="#virDomainCreateFlags">virDomainCreateFlags</a>;
typedef struct _virDomainInfo <a href="#virDomainInfo">virDomainInfo</a>;
typedef enum <a href="#virVcpuState">virVcpuState</a>;
int <a href="#virDomainGetInfo">virDomainGetInfo</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> <a href="libvirt-libvirt.html#virDomainInfoPtr">virDomainInfoPtr</a> info);
int <a href="#virDomainUndefine">virDomainUndefine</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> <a href="#virDomainDefineXML">virDomainDefineXML</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xml);
int <a href="#virDomainShutdown">virDomainShutdown</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virGetVersion">virGetVersion</a> (unsigned long * libVer, <br/> const char * type, <br/> unsigned long * typeVer);
int <a href="#virConnectListDefinedDomains">virConnectListDefinedDomains</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char ** names, <br/> int maxnames);
<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> <a href="#virDomainLookupByName">virDomainLookupByName</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * name);
int <a href="#virDomainPinVcpu">virDomainPinVcpu</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned int vcpu, <br/> unsigned char * cpumap, <br/> int maplen);
int <a href="#virDomainRestore">virDomainRestore</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * from);
const char * <a href="#virConnectGetType">virConnectGetType</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn);
int <a href="#virDomainSave">virDomainSave</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> const char * to);
int <a href="#virDomainCreate">virDomainCreate</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virConnectListDomains">virConnectListDomains</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> int * ids, <br/> int maxids);
int <a href="#virDomainCoreDump">virDomainCoreDump</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> const char * to, <br/> int flags);
<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> <a href="#virDomainLookupByUUID">virDomainLookupByUUID</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const unsigned char * uuid);
<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> <a href="#virDomainLookupByUUIDString">virDomainLookupByUUIDString</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * uuidstr);
<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> <a href="#virDomainLookupByID">virDomainLookupByID</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> int id);
char * <a href="#virDomainGetOSType">virDomainGetOSType</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virNodeGetInfo">virNodeGetInfo</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> <a href="libvirt-libvirt.html#virNodeInfoPtr">virNodeInfoPtr</a> info);
int <a href="#virDomainGetUUID">virDomainGetUUID</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned char * uuid);
int <a href="#virConnectNumOfDomains">virConnectNumOfDomains</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn);
int <a href="#virDomainGetUUIDString">virDomainGetUUIDString</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * buf);
unsigned long <a href="#virDomainGetMaxMemory">virDomainGetMaxMemory</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virDomainAttachDevice">virDomainAttachDevice</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * xml);
int <a href="#virDomainSetMaxMemory">virDomainSetMaxMemory</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned long memory);
int <a href="#virDomainFree">virDomainFree</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> <a href="#virConnectOpen">virConnectOpen</a> (const char * name);
int <a href="#virDomainSuspend">virDomainSuspend</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virConnectNumOfDefinedDomains">virConnectNumOfDefinedDomains</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn);
int <a href="#virConnectClose">virConnectClose</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn);
int <a href="#virDomainReboot">virDomainReboot</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned int flags);
int <a href="#virInitialize">virInitialize</a> (void);
int <a href="#virDomainSetVcpus">virDomainSetVcpus</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned int nvcpus);
unsigned int <a href="#virDomainGetID">virDomainGetID</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virDomainResume">virDomainResume</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> <a href="#virDomainCreateLinux">virDomainCreateLinux</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xmlDesc, <br/> unsigned int flags);
int <a href="#virDomainSetMemory">virDomainSetMemory</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned long memory);
int <a href="#virDomainDestroy">virDomainDestroy</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
int <a href="#virDomainDetachDevice">virDomainDetachDevice</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * xml);
int <a href="#virDomainGetVcpus">virDomainGetVcpus</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> <a href="libvirt-libvirt.html#virVcpuInfoPtr">virVcpuInfoPtr</a> info, <br/> int maxinfo, <br/> unsigned char * cpumaps, <br/> int maplen);
char * <a href="#virDomainGetXMLDesc">virDomainGetXMLDesc</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> int flags);
int <a href="#virConnectGetVersion">virConnectGetVersion</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> unsigned long * hvVer);
const char * <a href="#virDomainGetName">virDomainGetName</a> (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain);
<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> <a href="#virConnectOpenReadOnly">virConnectOpenReadOnly</a> (const char * name);
</pre>
</div>
<div class="refsect1" lang="en">
<h2>Description</h2>
</div>
<div class="refsect1" lang="en">
<h2>Details</h2>
<div class="refsect2" lang="en">
<div class="refsect2" lang="en"><h3><a name="LIBVIR_VERSION_NUMBER">Macro </a>LIBVIR_VERSION_NUMBER</h3><pre class="programlisting">#define <a href="#LIBVIR_VERSION_NUMBER">LIBVIR_VERSION_NUMBER</a>;
</pre><p>Macro providing the version of the library as version * 1,000,000 + minor * 1000 + micro</p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_COPY_CPUMAP">Macro </a>VIR_COPY_CPUMAP</h3><pre class="programlisting">#define <a href="#VIR_COPY_CPUMAP">VIR_COPY_CPUMAP</a>(cpumaps, maplen, vcpu, cpumap);
</pre><p>This macro is to be used in conjonction with virDomainGetVcpus() and virDomainPinVcpu() APIs. <a href="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><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>cpumaps</tt></i>:</span></td><td>pointer to an array of cpumap (in 8-bit bytes) (IN)</td></tr><tr><td><span class="term"><i><tt>maplen</tt></i>:</span></td><td>the length (in bytes) of one cpumap</td></tr><tr><td><span class="term"><i><tt>vcpu</tt></i>:</span></td><td>the virtual CPU number</td></tr><tr><td><span class="term"><i><tt>cpumap</tt></i>:</span></td><td>pointer to a cpumap (in 8-bit bytes) (OUT) This cpumap must be previously allocated by the caller (ie: malloc(maplen))</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_CPU_MAPLEN">Macro </a>VIR_CPU_MAPLEN</h3><pre class="programlisting">#define <a href="#VIR_CPU_MAPLEN">VIR_CPU_MAPLEN</a>(cpu);
</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 &amp; all physical CPUs of a domain.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>cpu</tt></i>:</span></td><td>number of physical CPUs</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_CPU_USABLE">Macro </a>VIR_CPU_USABLE</h3><pre class="programlisting">#define <a href="#VIR_CPU_USABLE">VIR_CPU_USABLE</a>(cpumaps, maplen, vcpu, cpu);
</pre><p>This macro is to be used in conjonction with virDomainGetVcpus() API. <a href="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><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>cpumaps</tt></i>:</span></td><td>pointer to an array of cpumap (in 8-bit bytes) (IN)</td></tr><tr><td><span class="term"><i><tt>maplen</tt></i>:</span></td><td>the length (in bytes) of one cpumap</td></tr><tr><td><span class="term"><i><tt>vcpu</tt></i>:</span></td><td>the virtual CPU number</td></tr><tr><td><span class="term"><i><tt>cpu</tt></i>:</span></td><td>the physical CPU number</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_GET_CPUMAP">Macro </a>VIR_GET_CPUMAP</h3><pre class="programlisting">#define <a href="#VIR_GET_CPUMAP">VIR_GET_CPUMAP</a>(cpumaps, maplen, vcpu);
</pre><p>This macro is to be used in conjonction with virDomainGetVcpus() and virDomainPinVcpu() APIs. <a href="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><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>cpumaps</tt></i>:</span></td><td>pointer to an array of cpumap (in 8-bit bytes) (IN)</td></tr><tr><td><span class="term"><i><tt>maplen</tt></i>:</span></td><td>the length (in bytes) of one cpumap</td></tr><tr><td><span class="term"><i><tt>vcpu</tt></i>:</span></td><td>the virtual CPU number</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_NODEINFO_MAXCPUS">Macro </a>VIR_NODEINFO_MAXCPUS</h3><pre class="programlisting">#define <a href="#VIR_NODEINFO_MAXCPUS">VIR_NODEINFO_MAXCPUS</a>(nodeinfo);
</pre><p>This macro is to calculate the total number of CPUs supported but not neccessarily active in the host.</p><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>nodeinfo</tt></i>:</span></td><td><a href="libvirt-libvirt.html#virNodeInfo">virNodeInfo</a> instance</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_UNUSE_CPU">Macro </a>VIR_UNUSE_CPU</h3><pre class="programlisting">#define <a href="#VIR_UNUSE_CPU">VIR_UNUSE_CPU</a>(cpumap, 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><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>cpumap</tt></i>:</span></td><td>pointer to a bit map of real CPUs (in 8-bit bytes) (IN/OUT)</td></tr><tr><td><span class="term"><i><tt>cpu</tt></i>:</span></td><td>the physical CPU number</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="VIR_USE_CPU">Macro </a>VIR_USE_CPU</h3><pre class="programlisting">#define <a href="#VIR_USE_CPU">VIR_USE_CPU</a>(cpumap, 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><div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>cpumap</tt></i>:</span></td><td>pointer to a bit map of real CPUs (in 8-bit bytes) (IN/OUT)</td></tr><tr><td><span class="term"><i><tt>cpu</tt></i>:</span></td><td>the physical CPU number</td></tr></tbody></table></div>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virConnect">Structure </a>virConnect</h3><pre class="programlisting">struct _virConnect {
The content of this structure is not made public by the API.
} virConnect;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virConnectPtr">Typedef </a>virConnectPtr</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virConnect">virConnect</a> * virConnectPtr;
</pre><p>a <a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> is pointer to a <a href="libvirt-libvirt.html#virConnect">virConnect</a> private structure, this is the type used to reference a connection to the Xen Hypervisor in the API.</p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDeviceMode">Enum </a>virDeviceMode</h3><pre class="programlisting">enum <a href="#virDeviceMode">virDeviceMode</a> {
<a name="VIR_DEVICE_DEFAULT">VIR_DEVICE_DEFAULT</a> = 0 /* Default mode */
<a name="VIR_DEVICE_RO">VIR_DEVICE_RO</a> = 1 /* Access read-only */
<a name="VIR_DEVICE_RW">VIR_DEVICE_RW</a> = 2 /* Access read-write */
<a name="VIR_DEVICE_RW_FORCE">VIR_DEVICE_RW_FORCE</a> = 3 /* Forced read-write even if already used */
};
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomain">Structure </a>virDomain</h3><pre class="programlisting">struct _virDomain {
The content of this structure is not made public by the API.
} virDomain;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainCreateFlags">Enum </a>virDomainCreateFlags</h3><pre class="programlisting">enum <a href="#virDomainCreateFlags">virDomainCreateFlags</a> {
<a name="VIR_DOMAIN_NONE">VIR_DOMAIN_NONE</a> = 0
};
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainInfo">Structure </a>virDomainInfo</h3><pre class="programlisting">struct _virDomainInfo {
unsigned char state : the running state, one of virDomainFlags
unsigned long maxMem : the maximum memory in KBytes allowed
unsigned long memory : the memory in KBytes used by the domain
unsigned short nrVirtCpu : the number of virtual CPUs for the domain
unsigned long long cpuTime : the CPU time used in nanoseconds
} virDomainInfo;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainInfoPtr">Typedef </a>virDomainInfoPtr</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainInfo">virDomainInfo</a> * virDomainInfoPtr;
</pre><p>a <a href="libvirt-libvirt.html#virDomainInfoPtr">virDomainInfoPtr</a> is a pointer to a <a href="libvirt-libvirt.html#virDomainInfo">virDomainInfo</a> structure.</p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainKernel">Structure </a>virDomainKernel</h3><pre class="programlisting">struct _virDomainKernel {
const char * kernel : filename pointing to the kernel image
const char * ramdisk : an optional init ramdisk
const char * root : an optional root block device
const char * extra : optional kernel command line parameters
} virDomainKernel;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainKernelPtr">Typedef </a>virDomainKernelPtr</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainKernel">virDomainKernel</a> * virDomainKernelPtr;
</pre><p>a <a href="libvirt-libvirt.html#virDomainKernelPtr">virDomainKernelPtr</a> is a pointer to a <a href="libvirt-libvirt.html#virDomainKernel">virDomainKernel</a> structure.</p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainPtr">Typedef </a>virDomainPtr</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomain">virDomain</a> * virDomainPtr;
</pre><p>a <a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> is pointer to a <a href="libvirt-libvirt.html#virDomain">virDomain</a> private structure, this is the type used to reference a Xen domain in the API.</p>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainRestart">Enum </a>virDomainRestart</h3><pre class="programlisting">enum <a href="#virDomainRestart">virDomainRestart</a> {
<a name="VIR_DOMAIN_DESTROY">VIR_DOMAIN_DESTROY</a> = 1 /* destroy the domain */
<a name="VIR_DOMAIN_RESTART">VIR_DOMAIN_RESTART</a> = 2 /* restart the domain */
<a name="VIR_DOMAIN_PRESERVE">VIR_DOMAIN_PRESERVE</a> = 3 /* keep as is, need manual destroy, for debug */
<a name="VIR_DOMAIN_RENAME_RESTART">VIR_DOMAIN_RENAME_RESTART</a> = 4 /* restart under an new unique name */
};
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainState">Enum </a>virDomainState</h3><pre class="programlisting">enum <a href="#virDomainState">virDomainState</a> {
<a name="VIR_DOMAIN_NOSTATE">VIR_DOMAIN_NOSTATE</a> = 0 /* no state */
<a name="VIR_DOMAIN_RUNNING">VIR_DOMAIN_RUNNING</a> = 1 /* the domain is running */
<a name="VIR_DOMAIN_BLOCKED">VIR_DOMAIN_BLOCKED</a> = 2 /* the domain is blocked on resource */
<a name="VIR_DOMAIN_PAUSED">VIR_DOMAIN_PAUSED</a> = 3 /* the domain is paused by user */
<a name="VIR_DOMAIN_SHUTDOWN">VIR_DOMAIN_SHUTDOWN</a> = 4 /* the domain is being shut down */
<a name="VIR_DOMAIN_SHUTOFF">VIR_DOMAIN_SHUTOFF</a> = 5 /* the domain is shut off */
<a name="VIR_DOMAIN_CRASHED">VIR_DOMAIN_CRASHED</a> = 6 /* the domain is crashed */
};
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virNodeInfo">Structure </a>virNodeInfo</h3><pre class="programlisting">struct _virNodeInfo {
charmodel[32] model : string indicating the CPU model
unsigned long memory : memory size in kilobytes
unsigned int cpus : the number of active CPUs
unsigned int mhz : expected CPU frequency
unsigned int nodes : the number of NUMA cell, 1 for uniform mem access
unsigned int sockets : number of CPU socket per node
unsigned int cores : number of core per socket
unsigned int threads : number of threads per core
} virNodeInfo;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virNodeInfoPtr">Typedef </a>virNodeInfoPtr</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virNodeInfo">virNodeInfo</a> * virNodeInfoPtr;
</pre><p>a <a href="libvirt-libvirt.html#virNodeInfoPtr">virNodeInfoPtr</a> is a pointer to a <a href="libvirt-libvirt.html#virNodeInfo">virNodeInfo</a> structure.</p>
</div>
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<div class="refsect2" lang="en"><h3><a name="virVcpuInfo">Structure </a>virVcpuInfo</h3><pre class="programlisting">struct _virVcpuInfo {
unsigned int number : virtual CPU number
int state : value from <a href="libvirt-libvirt.html#virVcpuState">virVcpuState</a>
unsigned long long cpuTime : CPU time used, in nanoseconds
int cpu : real CPU number, or -1 if offline
} virVcpuInfo;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virVcpuInfoPtr">Typedef </a>virVcpuInfoPtr</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virVcpuInfo">virVcpuInfo</a> * virVcpuInfoPtr;
</pre><p/>
</div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virVcpuState">Enum </a>virVcpuState</h3><pre class="programlisting">enum <a href="#virVcpuState">virVcpuState</a> {
<a name="VIR_VCPU_OFFLINE">VIR_VCPU_OFFLINE</a> = 0 /* the virtual CPU is offline */
<a name="VIR_VCPU_RUNNING">VIR_VCPU_RUNNING</a> = 1 /* the virtual CPU is running */
<a name="VIR_VCPU_BLOCKED">VIR_VCPU_BLOCKED</a> = 2 /* the virtual CPU is blocked on resource */
};
</pre><p/>
</div>
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<div class="refsect2" lang="en"><h3><a name="virConnectClose"/>virConnectClose ()</h3><pre class="programlisting">int virConnectClose (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="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></div>
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<div class="refsect2" lang="en"><h3><a name="virConnectGetType"/>virConnectGetType ()</h3><pre class="programlisting">const char * virConnectGetType (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>Get the name of the Hypervisor software used.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>NULL in case of error, a static zero terminated string otherwise.</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virConnectGetVersion"/>virConnectGetVersion ()</h3><pre class="programlisting">int virConnectGetVersion (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>hvVer</tt></i>:</span></td><td>return value for the version of the running hypervisor (OUT)</td></tr><tr><td><span class="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></div>
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<div class="refsect2" lang="en"><h3><a name="virConnectListDefinedDomains"/>virConnectListDefinedDomains ()</h3><pre class="programlisting">int virConnectListDefinedDomains (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char ** names, <br/> int maxnames)<br/>
</pre><p>list the defined domains, stores the pointers to the names in @names</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>names</tt></i>:</span></td><td>pointer to an array to store the names</td></tr><tr><td><span class="term"><i><tt>maxnames</tt></i>:</span></td><td>size of the array</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virConnectListDomains"/>virConnectListDomains ()</h3><pre class="programlisting">int virConnectListDomains (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> int * ids, <br/> int maxids)<br/>
</pre><p>Collect the list of active domains, and store their ID in @maxids</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>ids</tt></i>:</span></td><td>array to collect the list of IDs of active domains</td></tr><tr><td><span class="term"><i><tt>maxids</tt></i>:</span></td><td>size of @ids</td></tr><tr><td><span class="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></div>
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<div class="refsect2" lang="en"><h3><a name="virConnectNumOfDefinedDomains"/>virConnectNumOfDefinedDomains ()</h3><pre class="programlisting">int virConnectNumOfDefinedDomains (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>Provides the number of active domains.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virConnectNumOfDomains"/>virConnectNumOfDomains ()</h3><pre class="programlisting">int virConnectNumOfDomains (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
</pre><p>Provides the number of active domains.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virConnectOpen"/>virConnectOpen ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> virConnectOpen (const char * name)<br/>
</pre><p>This function should be called first to get a connection to the Hypervisor and xen store</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>optional argument currently unused, pass NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the hypervisor connection or NULL in case of error</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virConnectOpenReadOnly"/>virConnectOpenReadOnly ()</h3><pre class="programlisting"><a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>optional argument currently unused, pass NULL</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the hypervisor connection or NULL in case of error</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainAttachDevice"/>virDomainAttachDevice ()</h3><pre class="programlisting">int virDomainAttachDevice (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * xml)<br/>
</pre><p>Create a virtual device attachment to backend.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><span class="term"><i><tt>xml</tt></i>:</span></td><td>pointer to XML description of one device</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainCoreDump"/>virDomainCoreDump ()</h3><pre class="programlisting">int virDomainCoreDump (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>to</tt></i>:</span></td><td>path for the core file</td></tr><tr><td><span class="term"><i><tt>flags</tt></i>:</span></td><td>extra flags, currently unused</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainCreate"/>virDomainCreate ()</h3><pre class="programlisting">int virDomainCreate (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to a defined domain</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainCreateLinux"/>virDomainCreateLinux ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainCreateLinux (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>xmlDesc</tt></i>:</span></td><td>an XML description of the domain</td></tr><tr><td><span class="term"><i><tt>flags</tt></i>:</span></td><td>an optional set of virDomainFlags</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainDefineXML"/>virDomainDefineXML ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainDefineXML (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * xml)<br/>
</pre><p>define a domain, but does not start it</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>xml</tt></i>:</span></td><td>the XML description for the domain, preferably in UTF-8</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainDestroy"/>virDomainDestroy ()</h3><pre class="programlisting">int virDomainDestroy (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainDetachDevice"/>virDomainDetachDevice ()</h3><pre class="programlisting">int virDomainDetachDevice (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * xml)<br/>
</pre><p>Destroy a virtual device attachment to backend.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object</td></tr><tr><td><span class="term"><i><tt>xml</tt></i>:</span></td><td>pointer to XML description of one device</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainFree"/>virDomainFree ()</h3><pre class="programlisting">int virDomainFree (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Free the domain object. The running instance is kept alive. The data structure is freed and should not be used thereafter.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetID"/>virDomainGetID ()</h3><pre class="programlisting">unsigned int virDomainGetID (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Get the hypervisor ID number for the domain</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetInfo"/>virDomainGetInfo ()</h3><pre class="programlisting">int virDomainGetInfo (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> <a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>info</tt></i>:</span></td><td>pointer to a <a href="libvirt-libvirt.html#virDomainInfo">virDomainInfo</a> structure allocated by the user</td></tr><tr><td><span class="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>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetMaxMemory"/>virDomainGetMaxMemory ()</h3><pre class="programlisting">unsigned long virDomainGetMaxMemory (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object or NULL</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetName"/>virDomainGetName ()</h3><pre class="programlisting">const char * virDomainGetName (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Get the public name for that domain</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetOSType"/>virDomainGetOSType ()</h3><pre class="programlisting">char * virDomainGetOSType (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>Get the type of domain operation system.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainGetUUID"/>virDomainGetUUID ()</h3><pre class="programlisting">int virDomainGetUUID (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> unsigned char * uuid)<br/>
</pre><p>Get the UUID for a domain</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>uuid</tt></i>:</span></td><td>pointer to a 16 bytes array</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetUUIDString"/>virDomainGetUUIDString ()</h3><pre class="programlisting">int virDomainGetUUIDString (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> char * buf)<br/>
</pre><p>Get the UUID for a domain as string. For more information about UUID see RFC4122.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>buf</tt></i>:</span></td><td>pointer to a 37 bytes array</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error, 0 in case of success</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetVcpus"/>virDomainGetVcpus ()</h3><pre class="programlisting">int virDomainGetVcpus (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> <a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object, or NULL for Domain0</td></tr><tr><td><span class="term"><i><tt>info</tt></i>:</span></td><td>pointer to an array of <a href="libvirt-libvirt.html#virVcpuInfo">virVcpuInfo</a> structures (OUT)</td></tr><tr><td><span class="term"><i><tt>maxinfo</tt></i>:</span></td><td>number of structures in info array</td></tr><tr><td><span class="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 &lt;maxinfo&gt; 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><span class="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><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainGetXMLDesc"/>virDomainGetXMLDesc ()</h3><pre class="programlisting">char * virDomainGetXMLDesc (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain, <br/> int flags)<br/>
</pre><p>Provide an XML description of the domain. The description may be reused later to relaunch the domain with virDomainCreateLinux().</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>flags</tt></i>:</span></td><td>and OR'ed set of extraction flags, not used yet</td></tr><tr><td><span class="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></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainLookupByID"/>virDomainLookupByID ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByID (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> int id)<br/>
</pre><p>Try to find a domain based on the hypervisor ID number</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>id</tt></i>:</span></td><td>the domain ID number</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure</td></tr></tbody></table></div></div>
<hr/>
<div class="refsect2" lang="en"><h3><a name="virDomainLookupByName"/>virDomainLookupByName ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByName (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * name)<br/>
</pre><p>Try to lookup a domain on the given hypervisor based on its name.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>name</tt></i>:</span></td><td>name for the domain</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainLookupByUUID"/>virDomainLookupByUUID ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByUUID (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const unsigned char * uuid)<br/>
</pre><p>Try to lookup a domain on the given hypervisor based on its UUID.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>uuid</tt></i>:</span></td><td>the raw UUID for the domain</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainLookupByUUIDString"/>virDomainLookupByUUIDString ()</h3><pre class="programlisting"><a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> virDomainLookupByUUIDString (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> const char * uuidstr)<br/>
</pre><p>Try to lookup a domain on the given hypervisor based on its UUID.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>uuidstr</tt></i>:</span></td><td>the string UUID for the domain</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a new domain object or NULL in case of failure</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainPinVcpu"/>virDomainPinVcpu ()</h3><pre class="programlisting">int virDomainPinVcpu (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object, or NULL for Domain0</td></tr><tr><td><span class="term"><i><tt>vcpu</tt></i>:</span></td><td>virtual CPU number</td></tr><tr><td><span class="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><span class="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 &lt; size, missing bytes are set to zero. If maplen &gt; size, failure code is returned.</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainReboot"/>virDomainReboot ()</h3><pre class="programlisting">int virDomainReboot (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>flags</tt></i>:</span></td><td>extra flags for the reboot operation, not used yet</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainRestore"/>virDomainRestore ()</h3><pre class="programlisting">int virDomainRestore (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>from</tt></i>:</span></td><td>path to the</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainResume"/>virDomainResume ()</h3><pre class="programlisting">int virDomainResume (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainSave"/>virDomainSave ()</h3><pre class="programlisting">int virDomainSave (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="term"><i><tt>to</tt></i>:</span></td><td>path for the output file</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainSetMaxMemory"/>virDomainSetMaxMemory ()</h3><pre class="programlisting">int virDomainSetMaxMemory (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object or NULL</td></tr><tr><td><span class="term"><i><tt>memory</tt></i>:</span></td><td>the memory size in kilobytes</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainSetMemory"/>virDomainSetMemory ()</h3><pre class="programlisting">int virDomainSetMemory (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object or NULL</td></tr><tr><td><span class="term"><i><tt>memory</tt></i>:</span></td><td>the memory size in kilobytes</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainSetVcpus"/>virDomainSetVcpus ()</h3><pre class="programlisting">int virDomainSetVcpus (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to domain object, or NULL for Domain0</td></tr><tr><td><span class="term"><i><tt>nvcpus</tt></i>:</span></td><td>the new number of virtual CPUs for this domain</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of failure.</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virDomainShutdown"/>virDomainShutdown ()</h3><pre class="programlisting">int virDomainShutdown (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainSuspend"/>virDomainSuspend ()</h3><pre class="programlisting">int virDomainSuspend (<a href="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>a domain object</td></tr><tr><td><span class="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>
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<div class="refsect2" lang="en"><h3><a name="virDomainUndefine"/>virDomainUndefine ()</h3><pre class="programlisting">int virDomainUndefine (<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> domain)<br/>
</pre><p>undefine a domain but does not stop it if it is running</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>domain</tt></i>:</span></td><td>pointer to a defined domain</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virGetVersion"/>virGetVersion ()</h3><pre class="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>libVer</tt></i>:</span></td><td>return value for the library version (OUT)</td></tr><tr><td><span class="term"><i><tt>type</tt></i>:</span></td><td>the type of connection/driver looked at</td></tr><tr><td><span class="term"><i><tt>typeVer</tt></i>:</span></td><td>return value for the version of the hypervisor (OUT)</td></tr><tr><td><span class="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></div>
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<div class="refsect2" lang="en"><h3><a name="virInitialize"/>virInitialize ()</h3><pre class="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>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 in case of success, -1 in case of error</td></tr></tbody></table></div></div>
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<div class="refsect2" lang="en"><h3><a name="virNodeGetInfo"/>virNodeGetInfo ()</h3><pre class="programlisting">int virNodeGetInfo (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> <a href="libvirt-libvirt.html#virNodeInfoPtr">virNodeInfoPtr</a> info)<br/>
</pre><p>Extract hardware information about the node.</p>
<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>info</tt></i>:</span></td><td>pointer to a <a href="libvirt-libvirt.html#virNodeInfo">virNodeInfo</a> structure allocated by the user</td></tr><tr><td><span class="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>
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