libvirt/src/xen_unified.c

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/*
* xen_unified.c: Unified Xen driver.
*
* Copyright (C) 2007 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
* Richard W.M. Jones <rjones@redhat.com>
*/
#ifdef WITH_XEN
/* Note:
*
* This driver provides a unified interface to the five
* separate underlying Xen drivers (xen_internal, proxy_internal,
* xend_internal, xs_internal and xm_internal). Historically
* the body of libvirt.c handled the five Xen drivers,
* and contained Xen-specific code.
*
* The interface between Xen drivers and xen_unified is
* the same as for "ordinary" libvirt drivers (ie. virDriverPtr),
* however this is just for convenience and may be changed
* in future. Libvirt.c should no longer call directly
* to the five underlying Xen drivers.
*/
#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
#include <xen/dom0_ops.h>
#include "internal.h"
#include "xen_unified.h"
#include "xen_internal.h"
#include "proxy_internal.h"
#include "xend_internal.h"
#include "xs_internal.h"
#include "xm_internal.h"
/* The five Xen drivers below us. */
static virDriverPtr drivers[XEN_UNIFIED_NR_DRIVERS] = {
&xenHypervisorDriver,
&xenProxyDriver,
&xenDaemonDriver,
&xenStoreDriver,
&xenXMDriver
};
static const int hypervisor_offset = 0;
static const int proxy_offset = 1;
/**
* xenUnifiedError:
* @conn: the connection
* @error: the error number
* @info: extra information string
*
* Handle an error at the xend daemon interface
*/
static void
xenUnifiedError (virConnectPtr conn, virErrorNumber error, const char *info)
{
const char *errmsg;
errmsg = __virErrorMsg (error, info);
__virRaiseError (conn, NULL, NULL, VIR_FROM_XEN, error, VIR_ERR_ERROR,
errmsg, info, NULL, 0, 0, errmsg, info);
}
/*----- Dispatch functions. -----*/
/* These dispatch functions follow the model used historically
* by libvirt.c -- trying each low-level Xen driver in turn
* until one succeeds. However since we know what low-level
* drivers can perform which functions, it is probably better
* in future to optimise these dispatch functions to just call
* the single function (or small number of appropriate functions)
* in the low level drivers directly.
*/
static int
xenUnifiedOpen (virConnectPtr conn, const char *name, int flags)
{
int i, j;
xenUnifiedPrivatePtr priv;
/* If name == NULL, name == "", or begins with "xen", then it's for us. */
if (!name || name[0] == '\0')
name = "Xen";
if (strncasecmp (name, "Xen", 3) != 0)
return VIR_DRV_OPEN_DECLINED;
/* Allocate per-connection private data. */
priv = malloc (sizeof *priv);
if (!priv) {
xenUnifiedError (NULL, VIR_ERR_NO_MEMORY, "allocating private data");
return VIR_DRV_OPEN_ERROR;
}
conn->privateData = priv;
priv->handle = -1;
priv->xendConfigVersion = -1;
priv->type = -1;
priv->len = -1;
priv->addr = NULL;
priv->xshandle = NULL;
priv->proxy = -1;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i) {
priv->opened[i] = 0;
2007-05-02 16:17:02 +00:00
/* Only use XM driver for Xen <= 3.0.3 (ie xendConfigVersion <= 2) */
if (drivers[i] == &xenXMDriver &&
priv->xendConfigVersion > 2)
continue;
/* Ignore proxy for root */
if (i == proxy_offset && getuid() == 0)
continue;
if (drivers[i]->open &&
drivers[i]->open (conn, name, flags) == VIR_DRV_OPEN_SUCCESS)
priv->opened[i] = 1;
/* If as root, then all drivers must succeed.
If non-root, then only proxy must succeed */
if (!priv->opened[i] && (getuid() == 0 || i == proxy_offset)) {
for (j = 0; j < i; ++j)
if (priv->opened[j]) drivers[j]->close (conn);
return VIR_DRV_OPEN_ERROR;
}
}
return VIR_DRV_OPEN_SUCCESS;
}
#define GET_PRIVATE(conn) \
xenUnifiedPrivatePtr priv = (xenUnifiedPrivatePtr) (conn)->privateData
static int
xenUnifiedClose (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->close)
(void) drivers[i]->close (conn);
free (conn->privateData);
conn->privateData = NULL;
return 0;
}
static const char *
xenUnifiedType (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
const char *ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->type) {
ret = drivers[i]->type (conn);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedVersion (virConnectPtr conn, unsigned long *hvVer)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->version &&
drivers[i]->version (conn, hvVer) == 0)
return 0;
return -1;
}
static int
xenUnifiedGetMaxVcpus (virConnectPtr conn, const char *type)
{
GET_PRIVATE(conn);
int i;
if (!type)
type = "Xen";
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && strcmp (drivers[i]->name, type) == 0)
return drivers[i]->getMaxVcpus (conn, type);
return -1;
}
static int
xenUnifiedNodeGetInfo (virConnectPtr conn, virNodeInfoPtr info)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->nodeGetInfo &&
drivers[i]->nodeGetInfo (conn, info) == 0)
return 0;
return -1;
}
static char *
xenUnifiedGetCapabilities (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
char *ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->getCapabilities) {
ret = drivers[i]->getCapabilities (conn);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedListDomains (virConnectPtr conn, int *ids, int maxids)
{
GET_PRIVATE(conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->listDomains) {
ret = drivers[i]->listDomains (conn, ids, maxids);
if (ret >= 0) return ret;
}
return -1;
}
static int
xenUnifiedNumOfDomains (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->numOfDomains) {
ret = drivers[i]->numOfDomains (conn);
if (ret >= 0) return ret;
}
return -1;
}
static virDomainPtr
xenUnifiedDomainCreateLinux (virConnectPtr conn,
const char *xmlDesc, unsigned int flags)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainCreateLinux) {
ret = drivers[i]->domainCreateLinux (conn, xmlDesc, flags);
if (ret) return ret;
}
return NULL;
}
static virDomainPtr
xenUnifiedDomainLookupByID (virConnectPtr conn, int id)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainLookupByID) {
ret = drivers[i]->domainLookupByID (conn, id);
if (ret) return ret;
}
return NULL;
}
static virDomainPtr
xenUnifiedDomainLookupByUUID (virConnectPtr conn,
const unsigned char *uuid)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainLookupByUUID) {
ret = drivers[i]->domainLookupByUUID (conn, uuid);
if (ret) return ret;
}
return NULL;
}
static virDomainPtr
xenUnifiedDomainLookupByName (virConnectPtr conn,
const char *name)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainLookupByName) {
ret = drivers[i]->domainLookupByName (conn, name);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedDomainSuspend (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != hypervisor_offset &&
priv->opened[i] &&
drivers[i]->domainSuspend &&
drivers[i]->domainSuspend (dom) == 0)
return 0;
if (priv->opened[hypervisor_offset] &&
drivers[hypervisor_offset]->domainSuspend &&
drivers[hypervisor_offset]->domainSuspend (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainResume (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != hypervisor_offset &&
priv->opened[i] &&
drivers[i]->domainResume &&
drivers[i]->domainResume (dom) == 0)
return 0;
if (priv->opened[hypervisor_offset] &&
drivers[hypervisor_offset]->domainResume &&
drivers[hypervisor_offset]->domainResume (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainShutdown (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainShutdown &&
drivers[i]->domainShutdown (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainReboot (virDomainPtr dom, unsigned int flags)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainReboot &&
drivers[i]->domainReboot (dom, flags) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainDestroy (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != hypervisor_offset &&
priv->opened[i] &&
drivers[i]->domainDestroy &&
drivers[i]->domainDestroy (dom) == 0)
return 0;
if (priv->opened[i] &&
drivers[hypervisor_offset]->domainDestroy &&
drivers[hypervisor_offset]->domainDestroy (dom) == 0)
return 0;
return -1;
}
static char *
xenUnifiedDomainGetOSType (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
char *ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetOSType) {
ret = drivers[i]->domainGetOSType (dom);
if (ret) return ret;
}
return NULL;
}
static unsigned long
xenUnifiedDomainGetMaxMemory (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
unsigned long ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetMaxMemory) {
ret = drivers[i]->domainGetMaxMemory (dom);
if (ret != 0) return ret;
}
return 0;
}
static int
xenUnifiedDomainSetMaxMemory (virDomainPtr dom, unsigned long memory)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainSetMaxMemory &&
drivers[i]->domainSetMaxMemory (dom, memory) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSetMemory (virDomainPtr dom, unsigned long memory)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainSetMemory &&
drivers[i]->domainSetMemory (dom, memory) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainGetInfo (virDomainPtr dom, virDomainInfoPtr info)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainGetInfo &&
drivers[i]->domainGetInfo (dom, info) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSave (virDomainPtr dom, const char *to)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainSave &&
drivers[i]->domainSave (dom, to) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainRestore (virConnectPtr conn, const char *from)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainRestore &&
drivers[i]->domainRestore (conn, from) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainCoreDump (virDomainPtr dom, const char *to, int flags)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainCoreDump &&
drivers[i]->domainCoreDump (dom, to, flags) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSetVcpus (virDomainPtr dom, unsigned int nvcpus)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != hypervisor_offset &&
priv->opened[i] &&
drivers[i]->domainSetVcpus &&
drivers[i]->domainSetVcpus (dom, nvcpus) == 0)
return 0;
if (priv->opened[hypervisor_offset] &&
drivers[hypervisor_offset]->domainSetVcpus &&
drivers[hypervisor_offset]->domainSetVcpus (dom, nvcpus) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainPinVcpu (virDomainPtr dom, unsigned int vcpu,
unsigned char *cpumap, int maplen)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainPinVcpu &&
drivers[i]->domainPinVcpu (dom, vcpu, cpumap, maplen) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainGetVcpus (virDomainPtr dom,
virVcpuInfoPtr info, int maxinfo,
unsigned char *cpumaps, int maplen)
{
GET_PRIVATE(dom->conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetVcpus) {
ret = drivers[i]->domainGetVcpus (dom, info, maxinfo, cpumaps, maplen);
if (ret > 0)
return ret;
}
return -1;
}
static int
xenUnifiedDomainGetMaxVcpus (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetMaxVcpus) {
ret = drivers[i]->domainGetMaxVcpus (dom);
if (ret != 0) return ret;
}
return -1;
}
static char *
xenUnifiedDomainDumpXML (virDomainPtr dom, int flags)
{
GET_PRIVATE(dom->conn);
int i;
char *ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainDumpXML) {
ret = drivers[i]->domainDumpXML (dom, flags);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedListDefinedDomains (virConnectPtr conn, char **const names,
int maxnames)
{
GET_PRIVATE(conn);
int i;
int ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->listDefinedDomains) {
ret = drivers[i]->listDefinedDomains (conn, names, maxnames);
if (ret >= 0) return ret;
}
return -1;
}
static int
xenUnifiedNumOfDefinedDomains (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
int ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->numOfDefinedDomains) {
ret = drivers[i]->numOfDefinedDomains (conn);
if (ret >= 0) return ret;
}
return -1;
}
static int
xenUnifiedDomainCreate (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainCreate &&
drivers[i]->domainCreate (dom) == 0)
return 0;
return -1;
}
static virDomainPtr
xenUnifiedDomainDefineXML (virConnectPtr conn, const char *xml)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainDefineXML) {
ret = drivers[i]->domainDefineXML (conn, xml);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedDomainUndefine (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainUndefine &&
drivers[i]->domainUndefine (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainAttachDevice (virDomainPtr dom, char *xml)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainAttachDevice &&
drivers[i]->domainAttachDevice (dom, xml) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainDetachDevice (virDomainPtr dom, char *xml)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainDetachDevice &&
drivers[i]->domainDetachDevice (dom, xml) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainGetAutostart (virDomainPtr dom, int *autostart)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetAutostart &&
drivers[i]->domainGetAutostart (dom, autostart) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSetAutostart (virDomainPtr dom, int autostart)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainSetAutostart &&
drivers[i]->domainSetAutostart (dom, autostart) == 0)
return 0;
return -1;
}
/*----- Register with libvirt.c, and initialise Xen drivers. -----*/
#define VERSION ((DOM0_INTERFACE_VERSION >> 24) * 1000000 + \
((DOM0_INTERFACE_VERSION >> 16) & 0xFF) * 1000 + \
(DOM0_INTERFACE_VERSION & 0xFFFF))
/* The interface which we export upwards to libvirt.c. */
static virDriver xenUnifiedDriver = {
.no = VIR_DRV_XEN_UNIFIED,
.name = "Xen",
.ver = VERSION,
.open = xenUnifiedOpen,
.close = xenUnifiedClose,
.type = xenUnifiedType,
.version = xenUnifiedVersion,
.getMaxVcpus = xenUnifiedGetMaxVcpus,
.nodeGetInfo = xenUnifiedNodeGetInfo,
.getCapabilities = xenUnifiedGetCapabilities,
.listDomains = xenUnifiedListDomains,
.numOfDomains = xenUnifiedNumOfDomains,
.domainCreateLinux = xenUnifiedDomainCreateLinux,
.domainLookupByID = xenUnifiedDomainLookupByID,
.domainLookupByUUID = xenUnifiedDomainLookupByUUID,
.domainLookupByName = xenUnifiedDomainLookupByName,
.domainSuspend = xenUnifiedDomainSuspend,
.domainResume = xenUnifiedDomainResume,
.domainShutdown = xenUnifiedDomainShutdown,
.domainReboot = xenUnifiedDomainReboot,
.domainDestroy = xenUnifiedDomainDestroy,
.domainGetOSType = xenUnifiedDomainGetOSType,
.domainGetMaxMemory = xenUnifiedDomainGetMaxMemory,
.domainSetMaxMemory = xenUnifiedDomainSetMaxMemory,
.domainSetMemory = xenUnifiedDomainSetMemory,
.domainGetInfo = xenUnifiedDomainGetInfo,
.domainSave = xenUnifiedDomainSave,
.domainRestore = xenUnifiedDomainRestore,
.domainCoreDump = xenUnifiedDomainCoreDump,
.domainSetVcpus = xenUnifiedDomainSetVcpus,
.domainPinVcpu = xenUnifiedDomainPinVcpu,
.domainGetVcpus = xenUnifiedDomainGetVcpus,
.domainGetMaxVcpus = xenUnifiedDomainGetMaxVcpus,
.domainDumpXML = xenUnifiedDomainDumpXML,
.listDefinedDomains = xenUnifiedListDefinedDomains,
.numOfDefinedDomains = xenUnifiedNumOfDefinedDomains,
.domainCreate = xenUnifiedDomainCreate,
.domainDefineXML = xenUnifiedDomainDefineXML,
.domainUndefine = xenUnifiedDomainUndefine,
.domainAttachDevice = xenUnifiedDomainAttachDevice,
.domainDetachDevice = xenUnifiedDomainDetachDevice,
.domainGetAutostart = xenUnifiedDomainGetAutostart,
.domainSetAutostart = xenUnifiedDomainSetAutostart,
};
/**
* xenUnifiedRegister:
*
* Register xen related drivers
*
* Returns the driver priority or -1 in case of error.
*/
int
xenUnifiedRegister (void)
{
/* Ignore failures here. */
(void) xenHypervisorInit ();
(void) xenProxyInit ();
(void) xenDaemonInit ();
(void) xenStoreInit ();
(void) xenXMInit ();
return virRegisterDriver (&xenUnifiedDriver);
}
#endif /* WITH_XEN */
/*
* vim: set tabstop=4:
* vim: set shiftwidth=4:
* vim: set expandtab:
*/
/*
* Local variables:
* indent-tabs-mode: nil
* c-indent-level: 4
* c-basic-offset: 4
* tab-width: 4
* End:
*/