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* src/driver.h src/libvirt.c src/openvz_driver.c src/qemu_driver.c

Browse Source 
src/remote_internal.c src/test.c src/util.c src/util.h
  src/xen_unified.c: added probe interface at the driver level,
  use that to improve default hypervisor selection in the absence
  of a given URI when connecting
Daniel
This commit is contained in:
Daniel Veillard 2008-02-26 07:05:18 +00:00
parent 9b1cd481b8
commit 36c6bfa63d
10 changed files with 164 additions and 51 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
Tue Feb 26 08:02:57 CET 2008 Daniel Veillard <veillard@redhat.com>
* src/driver.h src/libvirt.c src/openvz_driver.c src/qemu_driver.c
src/remote_internal.c src/test.c src/util.c src/util.h
src/xen_unified.c: added probe interface at the driver level,
use that to improve default hypervisor selection in the absence
of a given URI when connecting
Mon Feb 25 14:53:59 CET 2008 Daniel Veillard <veillard@redhat.com>
* src/Makefile.am src/util-lib.h: fix done with Jim to allow

99
src/driver.h
View File

@ -69,6 +69,8 @@ typedef enum {
#define VIR_DRV_SUPPORTS_FEATURE(drv,conn,feature) \
((drv)->supports_feature ? (drv)->supports_feature((conn),(feature)) : 0)
typedef const char *
(*virDrvProbe) (void);
typedef virDrvOpenStatus
(*virDrvOpen) (virConnectPtr conn,
xmlURIPtr uri,
@ -277,62 +279,63 @@ typedef unsigned long long
* - close
*/
struct _virDriver {
int no; /* the number virDrvNo */
const char * name; /* the name of the driver */
unsigned long ver; /* the version of the backend */
virDrvOpen open;
virDrvClose close;
int no; /* the number virDrvNo */
const char * name; /* the name of the driver */
unsigned long ver; /* the version of the backend */
virDrvProbe probe;
virDrvOpen open;
virDrvClose close;
virDrvSupportsFeature supports_feature;
virDrvGetType type;
virDrvGetVersion version;
virDrvGetType type;
virDrvGetVersion version;
virDrvGetHostname getHostname;
virDrvGetURI getURI;
virDrvGetMaxVcpus getMaxVcpus;
virDrvNodeGetInfo nodeGetInfo;
virDrvGetCapabilities getCapabilities;
virDrvListDomains listDomains;
virDrvNumOfDomains numOfDomains;
virDrvDomainCreateLinux domainCreateLinux;
virDrvDomainLookupByID domainLookupByID;
virDrvDomainLookupByUUID domainLookupByUUID;
virDrvDomainLookupByName domainLookupByName;
virDrvDomainSuspend domainSuspend;
virDrvDomainResume domainResume;
virDrvDomainShutdown domainShutdown;
virDrvDomainReboot domainReboot;
virDrvDomainDestroy domainDestroy;
virDrvDomainGetOSType domainGetOSType;
virDrvDomainGetMaxMemory domainGetMaxMemory;
virDrvDomainSetMaxMemory domainSetMaxMemory;
virDrvDomainSetMemory domainSetMemory;
virDrvDomainGetInfo domainGetInfo;
virDrvDomainSave domainSave;
virDrvDomainRestore domainRestore;
virDrvDomainCoreDump domainCoreDump;
virDrvDomainSetVcpus domainSetVcpus;
virDrvDomainPinVcpu domainPinVcpu;
virDrvDomainGetVcpus domainGetVcpus;
virDrvDomainGetMaxVcpus domainGetMaxVcpus;
virDrvDomainDumpXML domainDumpXML;
virDrvListDefinedDomains listDefinedDomains;
virDrvNumOfDefinedDomains numOfDefinedDomains;
virDrvDomainCreate domainCreate;
virDrvDomainDefineXML domainDefineXML;
virDrvDomainUndefine domainUndefine;
virDrvDomainAttachDevice domainAttachDevice;
virDrvDomainDetachDevice domainDetachDevice;
virDrvDomainGetAutostart domainGetAutostart;
virDrvDomainSetAutostart domainSetAutostart;
virDrvDomainGetSchedulerType domainGetSchedulerType;
virDrvDomainGetSchedulerParameters domainGetSchedulerParameters;
virDrvDomainSetSchedulerParameters domainSetSchedulerParameters;
virDrvGetMaxVcpus getMaxVcpus;
virDrvNodeGetInfo nodeGetInfo;
virDrvGetCapabilities getCapabilities;
virDrvListDomains listDomains;
virDrvNumOfDomains numOfDomains;
virDrvDomainCreateLinux domainCreateLinux;
virDrvDomainLookupByID domainLookupByID;
virDrvDomainLookupByUUID domainLookupByUUID;
virDrvDomainLookupByName domainLookupByName;
virDrvDomainSuspend domainSuspend;
virDrvDomainResume domainResume;
virDrvDomainShutdown domainShutdown;
virDrvDomainReboot domainReboot;
virDrvDomainDestroy domainDestroy;
virDrvDomainGetOSType domainGetOSType;
virDrvDomainGetMaxMemory domainGetMaxMemory;
virDrvDomainSetMaxMemory domainSetMaxMemory;
virDrvDomainSetMemory domainSetMemory;
virDrvDomainGetInfo domainGetInfo;
virDrvDomainSave domainSave;
virDrvDomainRestore domainRestore;
virDrvDomainCoreDump domainCoreDump;
virDrvDomainSetVcpus domainSetVcpus;
virDrvDomainPinVcpu domainPinVcpu;
virDrvDomainGetVcpus domainGetVcpus;
virDrvDomainGetMaxVcpus domainGetMaxVcpus;
virDrvDomainDumpXML domainDumpXML;
virDrvListDefinedDomains listDefinedDomains;
virDrvNumOfDefinedDomains numOfDefinedDomains;
virDrvDomainCreate domainCreate;
virDrvDomainDefineXML domainDefineXML;
virDrvDomainUndefine domainUndefine;
virDrvDomainAttachDevice domainAttachDevice;
virDrvDomainDetachDevice domainDetachDevice;
virDrvDomainGetAutostart domainGetAutostart;
virDrvDomainSetAutostart domainSetAutostart;
virDrvDomainGetSchedulerType domainGetSchedulerType;
virDrvDomainGetSchedulerParameters domainGetSchedulerParameters;
virDrvDomainSetSchedulerParameters domainSetSchedulerParameters;
virDrvDomainMigratePrepare domainMigratePrepare;
virDrvDomainMigratePerform domainMigratePerform;
virDrvDomainMigrateFinish domainMigrateFinish;
virDrvDomainBlockStats domainBlockStats;
virDrvDomainInterfaceStats domainInterfaceStats;
virDrvNodeGetCellsFreeMemory nodeGetCellsFreeMemory;
virDrvNodeGetFreeMemory getFreeMemory;
virDrvNodeGetCellsFreeMemory nodeGetCellsFreeMemory;
virDrvNodeGetFreeMemory getFreeMemory;
};
typedef int

44
src/libvirt.c
View File

@ -632,9 +632,47 @@ do_open (const char *name,
virConnectPtr ret = NULL;
xmlURIPtr uri;
/* Convert NULL or "" to xen:/// for back compat */
if (!name || name[0] == '\0')
name = "xen:///";
/*
* If no URI is passed, then check for an environment string if not
* available probe the compiled in drivers to find a default hypervisor
* if detectable.
*/
if (!name || name[0] == '\0') {
char *defname = getenv("LIBVIRT_DEFAULT_URI");
if (defname && *defname) {
DEBUG("Using LIBVIRT_DEFAULT_URI %s", defname);
name = defname;
} else {
const char *use = NULL;
const char *latest;
int probes = 0;
for (i = 0; i < virNetworkDriverTabCount; i++) {
if ((virDriverTab[i]->probe != NULL) &&
((latest = virDriverTab[i]->probe()) != NULL)) {
probes++;
DEBUG("Probed %s", latest);
/*
* if running a xen kernel, give it priority over
* QEmu emultation
*/
if (STREQ(latest, "xen:///"))
use = latest;
else if (use == NULL)
use = latest;
}
}
if (use == NULL) {
name = "xen:///";
DEBUG("Could not probe any hypervisor defaulting to %s",
name);
} else {
name = use;
DEBUG("Using %s as default URI, %d hypervisor found",
use, probes);
}
}
}
/* Convert xen -> xen:/// for back compat */
if (!strcasecmp(name, "xen"))

10
src/openvz_driver.c
View File

@ -546,6 +546,15 @@ bail_out5:
return ret;
}
static const char *openvzProbe(void)
{
#ifdef __linux__
if ((getuid() == 0) && (virFileExists("/proc/vz")))
return("openvz:///");
#endif
return(NULL);
}
static virDrvOpenStatus openvzOpen(virConnectPtr conn,
xmlURIPtr uri,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
@ -694,6 +703,7 @@ static virDriver openvzDriver = {
VIR_DRV_OPENVZ,
"OPENVZ",
LIBVIR_VERSION_NUMBER,
openvzProbe, /* probe */
openvzOpen, /* open */
openvzClose, /* close */
NULL, /* supports_feature */

20
src/qemu_driver.c
View File

@ -1388,6 +1388,25 @@ static int qemudMonitorCommand(struct qemud_driver *driver ATTRIBUTE_UNUSED,
return -1;
}
/**
* qemudProbe:
*
* Probe for the availability of the qemu driver, assume the
* presence of QEmu emulation if the binaries are installed
*/
static const char *qemudProbe(void)
{
if ((virFileExists("/usr/bin/qemu")) ||
(virFileExists("/usr/bin/qemu-kvm")) ||
(virFileExists("/usr/bin/xenner"))) {
if (getuid() == 0) {
return("qemu:///system");
} else {
return("qemu:///session");
}
}
return(NULL);
}
static virDrvOpenStatus qemudOpen(virConnectPtr conn,
xmlURIPtr uri,
@ -2859,6 +2878,7 @@ static virDriver qemuDriver = {
VIR_DRV_QEMU,
"QEMU",
LIBVIR_VERSION_NUMBER,
qemudProbe, /* probe */
qemudOpen, /* open */
qemudClose, /* close */
NULL, /* supports_feature */

1
src/remote_internal.c
View File

@ -4599,6 +4599,7 @@ static virDriver driver = {
.no = VIR_DRV_REMOTE,
.name = "remote",
.ver = REMOTE_PROTOCOL_VERSION,
.probe = NULL,
.open = remoteOpen,
.close = remoteClose,
.supports_feature = remoteSupportsFeature,

1
src/test.c
View File

@ -1939,6 +1939,7 @@ static virDriver testDriver = {
VIR_DRV_TEST,
"Test",
LIBVIR_VERSION_NUMBER,
NULL, /* probe */
testOpen, /* open */
testClose, /* close */
NULL, /* supports_feature */

9
src/util.c
View File

@ -463,6 +463,15 @@ virFileLinkPointsTo (const char *checkLink ATTRIBUTE_UNUSED,
#endif /*! __MINGW32__ */
int virFileExists(const char *path)
{
struct stat st;
if (stat(path, &st) >= 0)
return(1);
return(0);
}
int virFileMakePath(const char *path)
{
struct stat st;

3
src/util.h
View File

@ -47,6 +47,9 @@ int virFileHasSuffix(const char *str,
int virFileLinkPointsTo(const char *checkLink,
const char *checkDest);
int virFileExists(const char *path);
int virFileMakePath(const char *path);
int virFileBuildPath(const char *dir,

20
src/xen_unified.c
View File

@ -39,6 +39,7 @@
#include "xs_internal.h"
#include "xm_internal.h"
#include "xml.h"
#include "util.h"
#define DEBUG(fmt,...) VIR_DEBUG(__FILE__, fmt,__VA_ARGS__)
@ -217,6 +218,24 @@ done:
* in the low level drivers directly.
*/
static const char *
xenUnifiedProbe (void)
{
#ifdef __linux__
if (virFileExists("/proc/xen"))
return("xen:///");
#endif
#ifdef __sun__
FILE *fh;
if (fh = fopen("/dev/xen/domcaps", "r")) {
fclose(fh);
return("xen:///");
}
#endif
return(NULL);
}
static int
xenUnifiedOpen (virConnectPtr conn, xmlURIPtr uri, virConnectAuthPtr auth, int flags)
{
@ -1198,6 +1217,7 @@ static virDriver xenUnifiedDriver = {
.no = VIR_DRV_XEN_UNIFIED,
.name = "Xen",
.ver = HV_VERSION,
.probe = xenUnifiedProbe,
.open = xenUnifiedOpen,
.close = xenUnifiedClose,
.supports_feature = xenUnifiedSupportsFeature,