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/*
* Copyright Intel Corp. 2020-2021
*
* ch_conf.c: functions for Cloud-Hypervisor configuration
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "configmake.h"
#include "vircommand.h"
#include "virlog.h"
#include "virobject.h"
#include "virstring.h"
#include "virutil.h"
#include "ch_conf.h"
#include "ch_domain.h"
#define VIR_FROM_THIS VIR_FROM_CH
VIR_LOG_INIT("ch.ch_conf");
static virClass *virCHDriverConfigClass;
static void virCHDriverConfigDispose(void *obj);
static int virCHConfigOnceInit(void)
{
if (!VIR_CLASS_NEW(virCHDriverConfig, virClassForObject()))
return -1;
return 0;
}
VIR_ONCE_GLOBAL_INIT(virCHConfig);
/* Functions */
virCaps *virCHDriverCapsInit(void)
{
g_autoptr(virCaps) caps = NULL;
virCapsGuest *guest;
if ((caps = virCapabilitiesNew(virArchFromHost(),
false, false)) == NULL)
return NULL;
if (!(caps->host.numa = virCapabilitiesHostNUMANewHost()))
return NULL;
if (virCapabilitiesInitCaches(caps) < 0)
return NULL;
guest = virCapabilitiesAddGuest(caps, VIR_DOMAIN_OSTYPE_HVM,
caps->host.arch, NULL, NULL, 0, NULL);
virCapabilitiesAddGuestDomain(guest, VIR_DOMAIN_VIRT_KVM,
NULL, NULL, 0, NULL);
return g_steal_pointer(&caps);
}
/**
* virCHDriverGetCapabilities:
*
* Get a reference to the virCaps instance for the
* driver. If @refresh is true, the capabilities will be
* rebuilt first
*
* The caller must release the reference with virObjetUnref
*
* Returns: a reference to a virCaps instance or NULL
*/
virCaps *virCHDriverGetCapabilities(virCHDriver *driver,
bool refresh)
{
virCaps *ret = NULL;
virCaps *caps = NULL;
if (refresh && !(caps = virCHDriverCapsInit()))
return NULL;
VIR_WITH_MUTEX_LOCK_GUARD(&driver->lock) {
if (refresh) {
virObjectUnref(driver->caps);
driver->caps = caps;
}
ret = virObjectRef(driver->caps);
}
return ret;
}
virDomainXMLOption *
chDomainXMLConfInit(virCHDriver *driver)
{
virCHDriverDomainDefParserConfig.priv = driver;
return virDomainXMLOptionNew(&virCHDriverDomainDefParserConfig,
&virCHDriverPrivateDataCallbacks,
NULL, NULL, NULL, NULL);
}
virCHDriverConfig *
virCHDriverConfigNew(bool privileged)
{
virCHDriverConfig *cfg;
if (virCHConfigInitialize() < 0)
return NULL;
if (!(cfg = virObjectNew(virCHDriverConfigClass)))
return NULL;
cfg->cgroupControllers = -1; /* Auto detect */
if (privileged) {
if (virGetUserID(CH_USER, &cfg->user) < 0)
return NULL;
if (virGetGroupID(CH_GROUP, &cfg->group) < 0)
return NULL;
} else {
cfg->user = (uid_t)-1;
cfg->group = (gid_t)-1;
}
if (privileged) {
cfg->logDir = g_strdup_printf("%s/log/libvirt/ch", LOCALSTATEDIR);
cfg->stateDir = g_strdup_printf("%s/libvirt/ch", RUNSTATEDIR);
} else {
g_autofree char *rundir = NULL;
g_autofree char *cachedir = NULL;
cachedir = virGetUserCacheDirectory();
cfg->logDir = g_strdup_printf("%s/ch/log", cachedir);
rundir = virGetUserRuntimeDirectory();
cfg->stateDir = g_strdup_printf("%s/ch/run", rundir);
}
return cfg;
}
virCHDriverConfig *virCHDriverGetConfig(virCHDriver *driver)
{
VIR_LOCK_GUARD lock = virLockGuardLock(&driver->lock);
return virObjectRef(driver->config);
}
static void
virCHDriverConfigDispose(void *obj)
{
virCHDriverConfig *cfg = obj;
g_free(cfg->stateDir);
g_free(cfg->logDir);
}
#define MIN_VERSION ((15 * 1000000) + (0 * 1000) + (0))
int
chExtractVersion(virCHDriver *driver)
{
unsigned long long version;
g_autofree char *help = NULL;
char *tmp = NULL;
g_autofree char *ch_cmd = g_find_program_in_path(CH_CMD);
g_autoptr(virCommand) cmd = NULL;
if (!ch_cmd)
return -2;
cmd = virCommandNewArgList(ch_cmd, "--version", NULL);
virCommandAddEnvString(cmd, "LC_ALL=C");
virCommandSetOutputBuffer(cmd, &help);
if (virCommandRun(cmd, NULL) < 0)
return -1;
tmp = help;
/* expected format: cloud-hypervisor v<major>.<minor>.<micro> */
if ((tmp = STRSKIP(tmp, "cloud-hypervisor v")) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unexpected output of cloud-hypervisor binary"));
return -1;
}
if (virStringParseVersion(&version, tmp, true) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to parse cloud-hypervisor version: %1$s"), tmp);
return -1;
}
if (version < MIN_VERSION) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Cloud-Hypervisor version is too old (v15.0 is the minimum supported version)"));
return -1;
}
driver->version = version;
return 0;
}
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