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/*
* Copyright (C) 2010 Red Hat, Inc.
* Copyright IBM Corp. 2008
*
* lxc_conf.c: config functions for managing linux containers
*
* Authors:
* David L. Leskovec <dlesko at linux.vnet.ibm.com>
*
* 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/>.
*
*/
/* includes */
#include <config.h>
#include <sys/utsname.h>
#include "lxc_conf.h"
#include "nodeinfo.h"
#include "virterror_internal.h"
#include "conf.h"
#include "memory.h"
#include "logging.h"
#include "uuid.h"
#include "configmake.h"
#include "lxc_container.h"
#include "virnodesuspend.h"
#define VIR_FROM_THIS VIR_FROM_LXC
static int lxcDefaultConsoleType(const char *ostype ATTRIBUTE_UNUSED)
{
return VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_LXC;
}
/* Functions */
virCapsPtr lxcCapsInit(virLXCDriverPtr driver)
{
struct utsname utsname;
virCapsPtr caps;
virCapsGuestPtr guest;
const char *altArch;
uname(&utsname);
if ((caps = virCapabilitiesNew(utsname.machine,
0, 0)) == NULL)
goto error;
caps->defaultConsoleTargetType = lxcDefaultConsoleType;
/* Some machines have problematic NUMA toplogy causing
* unexpected failures. We don't want to break the QEMU
* driver in this scenario, so log errors & carry on
*/
if (nodeCapsInitNUMA(caps) < 0) {
virCapabilitiesFreeNUMAInfo(caps);
VIR_WARN("Failed to query host NUMA topology, disabling NUMA capabilities");
}
if (virNodeSuspendGetTargetMask(&caps->host.powerMgmt) < 0)
VIR_WARN("Failed to get host power management capabilities");
if (virGetHostUUID(caps->host.host_uuid)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot get the host uuid"));
goto error;
}
/* XXX shouldn't 'borrow' KVM's prefix */
virCapabilitiesSetMacPrefix(caps, (unsigned char []){ 0x52, 0x54, 0x00 });
if ((guest = virCapabilitiesAddGuest(caps,
"exe",
utsname.machine,
sizeof(void*) == 4 ? 32 : 64,
LIBEXECDIR "/libvirt_lxc",
NULL,
0,
NULL)) == NULL)
goto error;
if (virCapabilitiesAddGuestDomain(guest,
"lxc",
NULL,
NULL,
0,
NULL) == NULL)
goto error;
/* On 64-bit hosts, we can use personality() to request a 32bit process */
if ((altArch = lxcContainerGetAlt32bitArch(utsname.machine)) != NULL) {
if ((guest = virCapabilitiesAddGuest(caps,
"exe",
altArch,
32,
LIBEXECDIR "/libvirt_lxc",
NULL,
0,
NULL)) == NULL)
goto error;
if (virCapabilitiesAddGuestDomain(guest,
"lxc",
NULL,
NULL,
0,
NULL) == NULL)
goto error;
}
/* LXC Requires an emulator in the XML */
virCapabilitiesSetEmulatorRequired(caps);
if (driver) {
/* Security driver data */
const char *doi, *model;
doi = virSecurityManagerGetDOI(driver->securityManager);
model = virSecurityManagerGetModel(driver->securityManager);
if (STRNEQ(model, "none")) {
/* Allocate just the primary security driver for LXC. */
if (VIR_ALLOC(caps->host.secModels) < 0)
goto no_memory;
caps->host.nsecModels = 1;
if (!(caps->host.secModels[0].model = strdup(model)))
goto no_memory;
if (!(caps->host.secModels[0].doi = strdup(doi)))
goto no_memory;
}
VIR_DEBUG("Initialized caps for security driver \"%s\" with "
"DOI \"%s\"", model, doi);
} else {
VIR_INFO("No driver, not initializing security driver");
}
return caps;
no_memory:
virReportOOMError();
error:
virCapabilitiesFree(caps);
return NULL;
}
int lxcLoadDriverConfig(virLXCDriverPtr driver)
{
char *filename;
virConfPtr conf;
virConfValuePtr p;
driver->securityDefaultConfined = false;
driver->securityRequireConfined = false;
/* Set the container configuration directory */
if ((driver->configDir = strdup(LXC_CONFIG_DIR)) == NULL)
goto no_memory;
if ((driver->stateDir = strdup(LXC_STATE_DIR)) == NULL)
goto no_memory;
if ((driver->logDir = strdup(LXC_LOG_DIR)) == NULL)
goto no_memory;
if ((driver->autostartDir = strdup(LXC_AUTOSTART_DIR)) == NULL)
goto no_memory;
if ((filename = strdup(SYSCONFDIR "/libvirt/lxc.conf")) == NULL)
goto no_memory;
/* Avoid error from non-existant or unreadable file. */
if (access (filename, R_OK) == -1)
goto done;
conf = virConfReadFile(filename, 0);
if (!conf)
goto done;
#define CHECK_TYPE(name,typ) if (p && p->type != (typ)) { \
virReportError(VIR_ERR_INTERNAL_ERROR, \
"%s: %s: expected type " #typ, \
filename, (name)); \
virConfFree(conf); \
return -1; \
}
p = virConfGetValue(conf, "log_with_libvirtd");
CHECK_TYPE ("log_with_libvirtd", VIR_CONF_LONG);
if (p) driver->log_libvirtd = p->l;
p = virConfGetValue (conf, "security_driver");
CHECK_TYPE ("security_driver", VIR_CONF_STRING);
if (p && p->str) {
if (!(driver->securityDriverName = strdup(p->str))) {
virReportOOMError();
virConfFree(conf);
return -1;
}
}
p = virConfGetValue (conf, "security_default_confined");
CHECK_TYPE ("security_default_confined", VIR_CONF_LONG);
if (p) driver->securityDefaultConfined = p->l;
p = virConfGetValue (conf, "security_require_confined");
CHECK_TYPE ("security_require_confined", VIR_CONF_LONG);
if (p) driver->securityRequireConfined = p->l;
#undef CHECK_TYPE
virConfFree(conf);
done:
VIR_FREE(filename);
return 0;
no_memory:
virReportOOMError();
return -1;
}
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