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libvirt/src/lxc/lxc_driver.c
Ján Tomko 94c98eb550 drivers: use g_strdup in probe functions 
The callers expect '1' on a successful probe,
so return 1 just like VIR_STRDUP would.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-10-21 12:51:55 +02:00

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/*
* Copyright (C) 2010-2016 Red Hat, Inc.
* Copyright IBM Corp. 2008
*
* lxc_driver.c: linux container driver functions
*
* 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 <fcntl.h>
#include <sched.h>
#include <sys/utsname.h>
#ifdef MAJOR_IN_MKDEV
# include <sys/mkdev.h>
#elif MAJOR_IN_SYSMACROS
# include <sys/sysmacros.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/poll.h>
#include <unistd.h>
#include <wait.h>
#include "virerror.h"
#include "virlog.h"
#include "datatypes.h"
#include "lxc_cgroup.h"
#include "lxc_conf.h"
#include "lxc_container.h"
#include "lxc_domain.h"
#include "lxc_driver.h"
#include "lxc_native.h"
#include "lxc_process.h"
#include "viralloc.h"
#include "virnetdevbridge.h"
#include "virnetdevveth.h"
#include "virnetdevopenvswitch.h"
#include "virhostcpu.h"
#include "virhostmem.h"
#include "viruuid.h"
#include "virhook.h"
#include "virfile.h"
#include "virpidfile.h"
#include "virfdstream.h"
#include "domain_audit.h"
#include "domain_nwfilter.h"
#include "virinitctl.h"
#include "virnetdev.h"
#include "virnetdevtap.h"
#include "virnodesuspend.h"
#include "virprocess.h"
#include "virtime.h"
#include "virtypedparam.h"
#include "viruri.h"
#include "virstring.h"
#include "viraccessapicheck.h"
#include "viraccessapichecklxc.h"
#include "virhostdev.h"
#include "netdev_bandwidth_conf.h"
#define VIR_FROM_THIS VIR_FROM_LXC
VIR_LOG_INIT("lxc.lxc_driver");
#define LXC_NB_MEM_PARAM 3
#define LXC_NB_DOMAIN_BLOCK_STAT_PARAM 4
static int lxcStateInitialize(bool privileged,
virStateInhibitCallback callback,
void *opaque);
static int lxcStateCleanup(void);
virLXCDriverPtr lxc_driver = NULL;
/**
* lxcDomObjFromDomain:
* @domain: Domain pointer that has to be looked up
*
* This function looks up @domain and returns the appropriate virDomainObjPtr
* that has to be released by calling virDomainObjEndAPI.
*
* Returns the domain object with incremented reference counter which is locked
* on success, NULL otherwise.
*/
static virDomainObjPtr
lxcDomObjFromDomain(virDomainPtr domain)
{
virDomainObjPtr vm;
virLXCDriverPtr driver = domain->conn->privateData;
char uuidstr[VIR_UUID_STRING_BUFLEN];
vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
if (!vm) {
virUUIDFormat(domain->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s' (%s)"),
uuidstr, domain->name);
return NULL;
}
return vm;
}
/* Functions */
static int
lxcConnectURIProbe(char **uri)
{
if (lxc_driver == NULL)
return 0;
*uri = g_strdup("lxc:///system");
return 1;
}
static virDrvOpenStatus lxcConnectOpen(virConnectPtr conn,
virConnectAuthPtr auth G_GNUC_UNUSED,
virConfPtr conf G_GNUC_UNUSED,
unsigned int flags)
{
virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
/* If path isn't '/' then they typoed, tell them correct path */
if (STRNEQ(conn->uri->path, "") &&
STRNEQ(conn->uri->path, "/") &&
STRNEQ(conn->uri->path, "/system")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unexpected LXC URI path '%s', try lxc:///system"),
conn->uri->path);
return VIR_DRV_OPEN_ERROR;
}
/* URI was good, but driver isn't active */
if (lxc_driver == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("lxc state driver is not active"));
return VIR_DRV_OPEN_ERROR;
}
if (virConnectOpenEnsureACL(conn) < 0)
return VIR_DRV_OPEN_ERROR;
conn->privateData = lxc_driver;
return VIR_DRV_OPEN_SUCCESS;
}
static int lxcConnectClose(virConnectPtr conn)
{
virLXCDriverPtr driver = conn->privateData;
virCloseCallbacksRun(driver->closeCallbacks, conn, driver->domains, driver);
conn->privateData = NULL;
return 0;
}
static int lxcConnectIsSecure(virConnectPtr conn G_GNUC_UNUSED)
{
/* Trivially secure, since always inside the daemon */
return 1;
}
static int lxcConnectIsEncrypted(virConnectPtr conn G_GNUC_UNUSED)
{
/* Not encrypted, but remote driver takes care of that */
return 0;
}
static int lxcConnectIsAlive(virConnectPtr conn G_GNUC_UNUSED)
{
return 1;
}
static char *lxcConnectGetCapabilities(virConnectPtr conn) {
virLXCDriverPtr driver = conn->privateData;
virCapsPtr caps;
char *xml;
if (virConnectGetCapabilitiesEnsureACL(conn) < 0)
return NULL;
if (!(caps = virLXCDriverGetCapabilities(driver, true)))
return NULL;
xml = virCapabilitiesFormatXML(caps);
virObjectUnref(caps);
return xml;
}
static virDomainPtr lxcDomainLookupByID(virConnectPtr conn,
int id)
{
virLXCDriverPtr driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
vm = virDomainObjListFindByID(driver->domains, id);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("No domain with matching id %d"), id);
goto cleanup;
}
if (virDomainLookupByIDEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainObjEndAPI(&vm);
return dom;
}
static virDomainPtr lxcDomainLookupByUUID(virConnectPtr conn,
const unsigned char *uuid)
{
virLXCDriverPtr driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
vm = virDomainObjListFindByUUID(driver->domains, uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("No domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLookupByUUIDEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainObjEndAPI(&vm);
return dom;
}
static virDomainPtr lxcDomainLookupByName(virConnectPtr conn,
const char *name)
{
virLXCDriverPtr driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
vm = virDomainObjListFindByName(driver->domains, name);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("No domain with matching name '%s'"), name);
goto cleanup;
}
if (virDomainLookupByNameEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainObjEndAPI(&vm);
return dom;
}
static int lxcDomainIsActive(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainIsActiveEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = virDomainObjIsActive(obj);
cleanup:
virDomainObjEndAPI(&obj);
return ret;
}
static int lxcDomainIsPersistent(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainIsPersistentEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = obj->persistent;
cleanup:
virDomainObjEndAPI(&obj);
return ret;
}
static int lxcDomainIsUpdated(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainIsUpdatedEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = obj->updated;
cleanup:
virDomainObjEndAPI(&obj);
return ret;
}
static int lxcConnectListDomains(virConnectPtr conn, int *ids, int nids)
{
virLXCDriverPtr driver = conn->privateData;
int n;
if (virConnectListDomainsEnsureACL(conn) < 0)
return -1;
n = virDomainObjListGetActiveIDs(driver->domains, ids, nids,
virConnectListDomainsCheckACL, conn);
return n;
}
static int lxcConnectNumOfDomains(virConnectPtr conn)
{
virLXCDriverPtr driver = conn->privateData;
int n;
if (virConnectNumOfDomainsEnsureACL(conn) < 0)
return -1;
n = virDomainObjListNumOfDomains(driver->domains, true,
virConnectNumOfDomainsCheckACL, conn);
return n;
}
static int lxcConnectListDefinedDomains(virConnectPtr conn,
char **const names, int nnames)
{
virLXCDriverPtr driver = conn->privateData;
int n;
if (virConnectListDefinedDomainsEnsureACL(conn) < 0)
return -1;
n = virDomainObjListGetInactiveNames(driver->domains, names, nnames,
virConnectListDefinedDomainsCheckACL, conn);
return n;
}
static int lxcConnectNumOfDefinedDomains(virConnectPtr conn)
{
virLXCDriverPtr driver = conn->privateData;
int n;
if (virConnectNumOfDefinedDomainsEnsureACL(conn) < 0)
return -1;
n = virDomainObjListNumOfDomains(driver->domains, false,
virConnectNumOfDefinedDomainsCheckACL, conn);
return n;
}
static virDomainPtr
lxcDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int flags)
{
virLXCDriverPtr driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virObjectEventPtr event = NULL;
virDomainDefPtr oldDef = NULL;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE;
virCheckFlags(VIR_DOMAIN_DEFINE_VALIDATE, NULL);
if (flags & VIR_DOMAIN_DEFINE_VALIDATE)
parse_flags |= VIR_DOMAIN_DEF_PARSE_VALIDATE_SCHEMA;
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
NULL, parse_flags)))
goto cleanup;
if (virXMLCheckIllegalChars("name", def->name, "\n") < 0)
goto cleanup;
if (virDomainDefineXMLFlagsEnsureACL(conn, def) < 0)
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
if ((def->nets != NULL) && !(cfg->have_netns)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("System lacks NETNS support"));
goto cleanup;
}
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
0, &oldDef)))
goto cleanup;
def = NULL;
vm->persistent = 1;
if (virDomainSaveConfig(cfg->configDir, driver->caps,
vm->newDef ? vm->newDef : vm->def) < 0) {
virDomainObjListRemove(driver->domains, vm);
goto cleanup;
}
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
!oldDef ?
VIR_DOMAIN_EVENT_DEFINED_ADDED :
VIR_DOMAIN_EVENT_DEFINED_UPDATED);
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainDefFree(def);
virDomainDefFree(oldDef);
virDomainObjEndAPI(&vm);
virObjectEventStateQueue(driver->domainEventState, event);
virObjectUnref(caps);
virObjectUnref(cfg);
return dom;
}
static virDomainPtr
lxcDomainDefineXML(virConnectPtr conn, const char *xml)
{
return lxcDomainDefineXMLFlags(conn, xml, 0);
}
static int lxcDomainUndefineFlags(virDomainPtr dom,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainUndefineFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("Cannot undefine transient domain"));
goto cleanup;
}
if (virDomainDeleteConfig(cfg->configDir,
cfg->autostartDir,
vm) < 0)
goto cleanup;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_UNDEFINED,
VIR_DOMAIN_EVENT_UNDEFINED_REMOVED);
if (virDomainObjIsActive(vm))
vm->persistent = 0;
else
virDomainObjListRemove(driver->domains, vm);
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
virObjectEventStateQueue(driver->domainEventState, event);
virObjectUnref(cfg);
return ret;
}
static int lxcDomainUndefine(virDomainPtr dom)
{
return lxcDomainUndefineFlags(dom, 0);
}
static int lxcDomainGetInfo(virDomainPtr dom,
virDomainInfoPtr info)
{
virDomainObjPtr vm;
int ret = -1;
virLXCDomainObjPrivatePtr priv;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
info->state = virDomainObjGetState(vm, NULL);
if (!virDomainObjIsActive(vm)) {
info->cpuTime = 0;
info->memory = vm->def->mem.cur_balloon;
} else {
if (virCgroupGetCpuacctUsage(priv->cgroup, &(info->cpuTime)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Cannot read cputime for domain"));
goto cleanup;
}
if (virCgroupGetMemoryUsage(priv->cgroup, &(info->memory)) < 0) {
/* Don't fail if we can't read memory usage due to a lack of
* kernel support */
if (virLastErrorIsSystemErrno(ENOENT)) {
virResetLastError();
info->memory = 0;
} else {
goto cleanup;
}
}
}
info->maxMem = virDomainDefGetMemoryTotal(vm->def);
info->nrVirtCpu = virDomainDefGetVcpus(vm->def);
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainGetState(virDomainPtr dom,
int *state,
int *reason,
unsigned int flags)
{
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetStateEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*state = virDomainObjGetState(vm, reason);
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static char *lxcDomainGetOSType(virDomainPtr dom)
{
virDomainObjPtr vm;
char *ret = NULL;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetOSTypeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (VIR_STRDUP(ret, virDomainOSTypeToString(vm->def->os.type)) < 0)
goto cleanup;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* Returns max memory in kb, 0 if error */
static unsigned long long
lxcDomainGetMaxMemory(virDomainPtr dom)
{
virDomainObjPtr vm;
unsigned long long ret = 0;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetMaxMemoryEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = virDomainDefGetMemoryTotal(vm->def);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int lxcDomainSetMemoryFlags(virDomainPtr dom, unsigned long newmem,
unsigned int flags)
{
virDomainObjPtr vm;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
virLXCDomainObjPrivatePtr priv;
virLXCDriverPtr driver = dom->conn->privateData;
virLXCDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_MEM_MAXIMUM, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
cfg = virLXCDriverGetConfig(driver);
priv = vm->privateData;
if (virDomainSetMemoryFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_MEM_MAXIMUM) {
if (def) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot resize the max memory "
"on an active domain"));
goto endjob;
}
if (persistentDef) {
virDomainDefSetMemoryTotal(persistentDef, newmem);
if (persistentDef->mem.cur_balloon > newmem)
persistentDef->mem.cur_balloon = newmem;
if (virDomainSaveConfig(cfg->configDir, driver->caps,
persistentDef) < 0)
goto endjob;
}
} else {
unsigned long oldmax = 0;
if (def)
oldmax = virDomainDefGetMemoryTotal(def);
if (persistentDef) {
if (!oldmax || oldmax > virDomainDefGetMemoryTotal(persistentDef))
oldmax = virDomainDefGetMemoryTotal(persistentDef);
}
if (newmem > oldmax) {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("Cannot set memory higher than max memory"));
goto endjob;
}
if (def) {
if (virCgroupSetMemory(priv->cgroup, newmem) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Failed to set memory for domain"));
goto endjob;
}
def->mem.cur_balloon = newmem;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (persistentDef) {
persistentDef->mem.cur_balloon = newmem;
if (virDomainSaveConfig(cfg->configDir, driver->caps,
persistentDef) < 0)
goto endjob;
}
}
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int lxcDomainSetMemory(virDomainPtr dom, unsigned long newmem)
{
return lxcDomainSetMemoryFlags(dom, newmem, VIR_DOMAIN_AFFECT_LIVE);
}
static int lxcDomainSetMaxMemory(virDomainPtr dom, unsigned long newmax)
{
return lxcDomainSetMemoryFlags(dom, newmax, VIR_DOMAIN_MEM_MAXIMUM);
}
static int
lxcDomainSetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainObjPtr vm = NULL;
virLXCDomainObjPrivatePtr priv = NULL;
virLXCDriverConfigPtr cfg = NULL;
virLXCDriverPtr driver = dom->conn->privateData;
unsigned long long hard_limit;
unsigned long long soft_limit;
unsigned long long swap_hard_limit;
bool set_hard_limit = false;
bool set_soft_limit = false;
bool set_swap_hard_limit = false;
int rc;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_MEMORY_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_MEMORY_SOFT_LIMIT,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG,
NULL) < 0)
return -1;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
cfg = virLXCDriverGetConfig(driver);
if (virDomainSetMemoryParametersEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
/* QEMU and LXC implementation are identical */
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cgroup memory controller is not mounted"));
goto endjob;
}
#define VIR_GET_LIMIT_PARAMETER(PARAM, VALUE) \
if ((rc = virTypedParamsGetULLong(params, nparams, PARAM, &VALUE)) < 0) \
goto endjob; \
\
if (rc == 1) \
set_ ## VALUE = true;
VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT, swap_hard_limit)
VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_HARD_LIMIT, hard_limit)
VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_SOFT_LIMIT, soft_limit)
#undef VIR_GET_LIMIT_PARAMETER
/* Swap hard limit must be greater than hard limit. */
if (set_swap_hard_limit || set_hard_limit) {
unsigned long long mem_limit = vm->def->mem.hard_limit;
unsigned long long swap_limit = vm->def->mem.swap_hard_limit;
if (set_swap_hard_limit)
swap_limit = swap_hard_limit;
if (set_hard_limit)
mem_limit = hard_limit;
if (mem_limit > swap_limit) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("memory hard_limit tunable value must be lower "
"than or equal to swap_hard_limit"));
goto endjob;
}
}
#define VIR_SET_MEM_PARAMETER(FUNC, VALUE) \
if (set_ ## VALUE) { \
if (def) { \
if ((rc = FUNC(priv->cgroup, VALUE)) < 0) \
goto endjob; \
def->mem.VALUE = VALUE; \
} \
\
if (persistentDef) \
persistentDef->mem.VALUE = VALUE; \
}
/* Soft limit doesn't clash with the others */
VIR_SET_MEM_PARAMETER(virCgroupSetMemorySoftLimit, soft_limit);
/* set hard limit before swap hard limit if decreasing it */
if (def && def->mem.hard_limit > hard_limit) {
VIR_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit);
/* inhibit changing the limit a second time */
set_hard_limit = false;
}
VIR_SET_MEM_PARAMETER(virCgroupSetMemSwapHardLimit, swap_hard_limit);
/* otherwise increase it after swap hard limit */
VIR_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit);
#undef VIR_SET_MEM_PARAMETER
if (def &&
virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
if (persistentDef &&
virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
goto endjob;
/* QEMU and LXC implementations are identical */
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
lxcDomainGetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virDomainDefPtr persistentDef = NULL;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
virLXCDomainObjPrivatePtr priv = NULL;
unsigned long long val;
int ret = -1;
size_t i;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetMemoryParametersEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto cleanup;
if (def &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
if ((*nparams) == 0) {
/* Current number of memory parameters supported by cgroups */
*nparams = LXC_NB_MEM_PARAM;
ret = 0;
goto cleanup;
}
for (i = 0; i < LXC_NB_MEM_PARAM && i < *nparams; i++) {
virTypedParameterPtr param = &params[i];
val = 0;
switch (i) {
case 0: /* fill memory hard limit here */
if (persistentDef) {
val = persistentDef->mem.hard_limit;
} else if (virCgroupGetMemoryHardLimit(priv->cgroup, &val) < 0) {
goto cleanup;
}
if (virTypedParameterAssign(param, VIR_DOMAIN_MEMORY_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG, val) < 0)
goto cleanup;
break;
case 1: /* fill memory soft limit here */
if (persistentDef) {
val = persistentDef->mem.soft_limit;
} else if (virCgroupGetMemorySoftLimit(priv->cgroup, &val) < 0) {
goto cleanup;
}
if (virTypedParameterAssign(param, VIR_DOMAIN_MEMORY_SOFT_LIMIT,
VIR_TYPED_PARAM_ULLONG, val) < 0)
goto cleanup;
break;
case 2: /* fill swap hard limit here */
if (persistentDef) {
val = persistentDef->mem.swap_hard_limit;
} else if (virCgroupGetMemSwapHardLimit(priv->cgroup, &val) < 0) {
goto cleanup;
}
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG, val) < 0)
goto cleanup;
break;
}
}
if (*nparams > LXC_NB_MEM_PARAM)
*nparams = LXC_NB_MEM_PARAM;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static char *lxcDomainGetXMLDesc(virDomainPtr dom,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
char *ret = NULL;
virCheckFlags(VIR_DOMAIN_XML_COMMON_FLAGS, NULL);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetXMLDescEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
ret = virDomainDefFormat((flags & VIR_DOMAIN_XML_INACTIVE) &&
vm->newDef ? vm->newDef : vm->def,
driver->caps,
virDomainDefFormatConvertXMLFlags(flags));
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static char *lxcConnectDomainXMLFromNative(virConnectPtr conn,
const char *nativeFormat,
const char *nativeConfig,
unsigned int flags)
{
char *xml = NULL;
virDomainDefPtr def = NULL;
virLXCDriverPtr driver = conn->privateData;
virCapsPtr caps = virLXCDriverGetCapabilities(driver, false);
virCheckFlags(0, NULL);
if (virConnectDomainXMLFromNativeEnsureACL(conn) < 0)
goto cleanup;
if (STRNEQ(nativeFormat, LXC_CONFIG_FORMAT)) {
virReportError(VIR_ERR_INVALID_ARG,
_("unsupported config type %s"), nativeFormat);
goto cleanup;
}
if (!(def = lxcParseConfigString(nativeConfig, caps, driver->xmlopt)))
goto cleanup;
xml = virDomainDefFormat(def, caps, 0);
cleanup:
virObjectUnref(caps);
virDomainDefFree(def);
return xml;
}
/**
* lxcDomainCreateWithFiles:
* @dom: domain to start
* @flags: Must be 0 for now
*
* Looks up domain and starts it.
*
* Returns 0 on success or -1 in case of error
*/
static int lxcDomainCreateWithFiles(virDomainPtr dom,
unsigned int nfiles,
int *files,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCheckFlags(VIR_DOMAIN_START_AUTODESTROY, -1);
virNWFilterReadLockFilterUpdates();
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainCreateWithFilesEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if ((vm->def->nets != NULL) && !(cfg->have_netns)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("System lacks NETNS support"));
goto cleanup;
}
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("Domain is already running"));
goto endjob;
}
ret = virLXCProcessStart(dom->conn, driver, vm,
nfiles, files,
(flags & VIR_DOMAIN_START_AUTODESTROY),
VIR_DOMAIN_RUNNING_BOOTED);
if (ret == 0) {
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
virDomainAuditStart(vm, "booted", true);
} else {
virDomainAuditStart(vm, "booted", false);
}
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectEventStateQueue(driver->domainEventState, event);
virObjectUnref(cfg);
virNWFilterUnlockFilterUpdates();
return ret;
}
/**
* lxcDomainCreate:
* @dom: domain to start
*
* Looks up domain and starts it.
*
* Returns 0 on success or -1 in case of error
*/
static int lxcDomainCreate(virDomainPtr dom)
{
return lxcDomainCreateWithFiles(dom, 0, NULL, 0);
}
/**
* lxcDomainCreateWithFlags:
* @dom: domain to start
*
* Looks up domain and starts it.
*
* Returns 0 on success or -1 in case of error
*/
static int lxcDomainCreateWithFlags(virDomainPtr dom,
unsigned int flags)
{
return lxcDomainCreateWithFiles(dom, 0, NULL, flags);
}
/**
* lxcDomainCreateXMLWithFiles:
* @conn: pointer to connection
* @xml: XML definition of domain
* @nfiles: number of file descriptors passed
* @files: list of file descriptors passed
* @flags: bitwise-OR of supported virDomainCreateFlags
*
* Creates a domain based on xml and starts it
*
* Returns a new domain object or NULL in case of failure.
*/
static virDomainPtr
lxcDomainCreateXMLWithFiles(virConnectPtr conn,
const char *xml,
unsigned int nfiles,
int *files,
unsigned int flags)
{
virLXCDriverPtr driver = conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainPtr dom = NULL;
virObjectEventPtr event = NULL;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE;
virCheckFlags(VIR_DOMAIN_START_AUTODESTROY |
VIR_DOMAIN_START_VALIDATE, NULL);
if (flags & VIR_DOMAIN_START_VALIDATE)
parse_flags |= VIR_DOMAIN_DEF_PARSE_VALIDATE_SCHEMA;
virNWFilterReadLockFilterUpdates();
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
NULL, parse_flags)))
goto cleanup;
if (virDomainCreateXMLWithFilesEnsureACL(conn, def) < 0)
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
if ((def->nets != NULL) && !(cfg->have_netns)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
"%s", _("System lacks NETNS support"));
goto cleanup;
}
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
VIR_DOMAIN_OBJ_LIST_ADD_LIVE |
VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
NULL)))
goto cleanup;
def = NULL;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0) {
if (!vm->persistent)
virDomainObjListRemove(driver->domains, vm);
goto cleanup;
}
if (virLXCProcessStart(conn, driver, vm,
nfiles, files,
(flags & VIR_DOMAIN_START_AUTODESTROY),
VIR_DOMAIN_RUNNING_BOOTED) < 0) {
virDomainAuditStart(vm, "booted", false);
virLXCDomainObjEndJob(driver, vm);
if (!vm->persistent)
virDomainObjListRemove(driver->domains, vm);
goto cleanup;
}
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
virDomainAuditStart(vm, "booted", true);
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(def);
virDomainObjEndAPI(&vm);
virObjectEventStateQueue(driver->domainEventState, event);
virObjectUnref(caps);
virObjectUnref(cfg);
virNWFilterUnlockFilterUpdates();
return dom;
}
/**
* lxcDomainCreateXML:
* @conn: pointer to connection
* @xml: XML definition of domain
* @flags: bitwise-OR of supported virDomainCreateFlags
*
* Creates a domain based on xml and starts it
*
* Returns a new domain object or NULL in case of failure.
*/
static virDomainPtr
lxcDomainCreateXML(virConnectPtr conn,
const char *xml,
unsigned int flags)
{
return lxcDomainCreateXMLWithFiles(conn, xml, 0, NULL, flags);
}
static int lxcDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr seclabel)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
memset(seclabel, 0, sizeof(*seclabel));
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetSecurityLabelEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
/*
* Theoretically, the pid can be replaced during this operation and
* return the label of a different process. If atomicity is needed,
* further validation will be required.
*
* Comment from Dan Berrange:
*
* Well the PID as stored in the virDomainObjPtr can't be changed
* because you've got a locked object. The OS level PID could have
* exited, though and in extreme circumstances have cycled through all
* PIDs back to ours. We could sanity check that our PID still exists
* after reading the label, by checking that our FD connecting to the
* LXC monitor hasn't seen SIGHUP/ERR on poll().
*/
if (virDomainObjIsActive(vm)) {
virLXCDomainObjPrivatePtr priv = vm->privateData;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Init pid is not yet available"));
goto cleanup;
}
if (virSecurityManagerGetProcessLabel(driver->securityManager,
vm->def, priv->initpid,
seclabel) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int lxcNodeGetSecurityModel(virConnectPtr conn,
virSecurityModelPtr secmodel)
{
virLXCDriverPtr driver = conn->privateData;
virCapsPtr caps = NULL;
int ret = 0;
memset(secmodel, 0, sizeof(*secmodel));
if (virNodeGetSecurityModelEnsureACL(conn) < 0)
goto cleanup;
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto cleanup;
/* we treat no driver as success, but simply return no data in *secmodel */
if (caps->host.nsecModels == 0
|| caps->host.secModels[0].model == NULL)
goto cleanup;
if (virStrcpy(secmodel->model, caps->host.secModels[0].model,
VIR_SECURITY_MODEL_BUFLEN) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("security model string exceeds max %d bytes"),
VIR_SECURITY_MODEL_BUFLEN - 1);
ret = -1;
goto cleanup;
}
if (virStrcpy(secmodel->doi, caps->host.secModels[0].doi,
VIR_SECURITY_DOI_BUFLEN) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("security DOI string exceeds max %d bytes"),
VIR_SECURITY_DOI_BUFLEN-1);
ret = -1;
goto cleanup;
}
cleanup:
virObjectUnref(caps);
return ret;
}
static int
lxcConnectDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback callback,
void *opaque,
virFreeCallback freecb)
{
virLXCDriverPtr driver = conn->privateData;
if (virConnectDomainEventRegisterEnsureACL(conn) < 0)
return -1;
if (virDomainEventStateRegister(conn,
driver->domainEventState,
callback, opaque, freecb) < 0)
return -1;
return 0;
}
static int
lxcConnectDomainEventDeregister(virConnectPtr conn,
virConnectDomainEventCallback callback)
{
virLXCDriverPtr driver = conn->privateData;
if (virConnectDomainEventDeregisterEnsureACL(conn) < 0)
return -1;
if (virDomainEventStateDeregister(conn,
driver->domainEventState,
callback) < 0)
return -1;
return 0;
}
static int
lxcConnectDomainEventRegisterAny(virConnectPtr conn,
virDomainPtr dom,
int eventID,
virConnectDomainEventGenericCallback callback,
void *opaque,
virFreeCallback freecb)
{
virLXCDriverPtr driver = conn->privateData;
int ret;
if (virConnectDomainEventRegisterAnyEnsureACL(conn) < 0)
return -1;
if (virDomainEventStateRegisterID(conn,
driver->domainEventState,
dom, eventID,
callback, opaque, freecb, &ret) < 0)
ret = -1;
return ret;
}
static int
lxcConnectDomainEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
virLXCDriverPtr driver = conn->privateData;
if (virConnectDomainEventDeregisterAnyEnsureACL(conn) < 0)
return -1;
if (virObjectEventStateDeregisterID(conn,
driver->domainEventState,
callbackID, true) < 0)
return -1;
return 0;
}
/**
* lxcDomainDestroyFlags:
* @dom: pointer to domain to destroy
* @flags: extra flags; not used yet.
*
* Sends SIGKILL to container root process to terminate the container
*
* Returns 0 on success or -1 in case of error
*/
static int
lxcDomainDestroyFlags(virDomainPtr dom,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
virLXCDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainDestroyFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_DESTROY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
priv = vm->privateData;
ret = virLXCProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_DESTROYED);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
priv->doneStopEvent = true;
virDomainAuditStop(vm, "destroyed");
endjob:
virLXCDomainObjEndJob(driver, vm);
if (!vm->persistent)
virDomainObjListRemove(driver->domains, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectEventStateQueue(driver->domainEventState, event);
return ret;
}
/**
* lxcDomainDestroy:
* @dom: pointer to domain to destroy
*
* Sends SIGKILL to container root process to terminate the container
*
* Returns 0 on success or -1 in case of error
*/
static int
lxcDomainDestroy(virDomainPtr dom)
{
return lxcDomainDestroyFlags(dom, 0);
}
static int lxcCheckNetNsSupport(void)
{
const char *argv[] = {"ip", "link", "set", "lo", "netns", "-1", NULL};
int ip_rc;
if (virRun(argv, &ip_rc) < 0 || ip_rc == 255)
return 0;
if (virProcessNamespaceAvailable(VIR_PROCESS_NAMESPACE_NET) < 0)
return 0;
return 1;
}
static virSecurityManagerPtr
lxcSecurityInit(virLXCDriverConfigPtr cfg)
{
unsigned int flags = VIR_SECURITY_MANAGER_PRIVILEGED;
VIR_INFO("lxcSecurityInit %s", cfg->securityDriverName);
if (cfg->securityDefaultConfined)
flags |= VIR_SECURITY_MANAGER_DEFAULT_CONFINED;
if (cfg->securityRequireConfined)
flags |= VIR_SECURITY_MANAGER_REQUIRE_CONFINED;
virSecurityManagerPtr mgr = virSecurityManagerNew(cfg->securityDriverName,
LXC_DRIVER_NAME, flags);
if (!mgr)
goto error;
return mgr;
error:
VIR_ERROR(_("Failed to initialize security drivers"));
virObjectUnref(mgr);
return NULL;
}
static int lxcStateInitialize(bool privileged,
virStateInhibitCallback callback G_GNUC_UNUSED,
void *opaque G_GNUC_UNUSED)
{
virCapsPtr caps = NULL;
virLXCDriverConfigPtr cfg = NULL;
bool autostart = true;
/* Check that the user is root, silently disable if not */
if (!privileged) {
VIR_INFO("Not running privileged, disabling driver");
return VIR_DRV_STATE_INIT_SKIPPED;
}
/* Check that this is a container enabled kernel */
if (virProcessNamespaceAvailable(VIR_PROCESS_NAMESPACE_MNT |
VIR_PROCESS_NAMESPACE_PID |
VIR_PROCESS_NAMESPACE_UTS |
VIR_PROCESS_NAMESPACE_IPC) < 0) {
VIR_INFO("LXC support not available in this kernel, disabling driver");
return VIR_DRV_STATE_INIT_SKIPPED;
}
if (VIR_ALLOC(lxc_driver) < 0)
return VIR_DRV_STATE_INIT_ERROR;
lxc_driver->lockFD = -1;
if (virMutexInit(&lxc_driver->lock) < 0) {
VIR_FREE(lxc_driver);
return VIR_DRV_STATE_INIT_ERROR;
}
if (!(lxc_driver->domains = virDomainObjListNew()))
goto cleanup;
lxc_driver->domainEventState = virObjectEventStateNew();
if (!lxc_driver->domainEventState)
goto cleanup;
lxc_driver->hostsysinfo = virSysinfoRead();
if (!(lxc_driver->config = cfg = virLXCDriverConfigNew()))
goto cleanup;
cfg->log_libvirtd = 0; /* by default log to container logfile */
cfg->have_netns = lxcCheckNetNsSupport();
/* Call function to load lxc driver configuration information */
if (virLXCLoadDriverConfig(cfg, SYSCONFDIR "/libvirt/lxc.conf") < 0)
goto cleanup;
if (!(lxc_driver->securityManager = lxcSecurityInit(cfg)))
goto cleanup;
if (!(lxc_driver->hostdevMgr = virHostdevManagerGetDefault()))
goto cleanup;
if (!(caps = virLXCDriverGetCapabilities(lxc_driver, true)))
goto cleanup;
if (!(lxc_driver->xmlopt = lxcDomainXMLConfInit()))
goto cleanup;
if (!(lxc_driver->closeCallbacks = virCloseCallbacksNew()))
goto cleanup;
if (virFileMakePath(cfg->stateDir) < 0) {
virReportSystemError(errno,
_("Failed to mkdir %s"),
cfg->stateDir);
goto cleanup;
}
if ((lxc_driver->lockFD =
virPidFileAcquire(cfg->stateDir, "driver", false, getpid())) < 0)
goto cleanup;
/* Get all the running persistent or transient configs first */
if (virDomainObjListLoadAllConfigs(lxc_driver->domains,
cfg->stateDir,
NULL, true,
caps,
lxc_driver->xmlopt,
NULL, NULL) < 0)
goto cleanup;
virLXCProcessReconnectAll(lxc_driver, lxc_driver->domains);
/* Then inactive persistent configs */
if (virDomainObjListLoadAllConfigs(lxc_driver->domains,
cfg->configDir,
cfg->autostartDir, false,
caps,
lxc_driver->xmlopt,
NULL, NULL) < 0)
goto cleanup;
if (virDriverShouldAutostart(cfg->stateDir, &autostart) < 0)
goto cleanup;
if (autostart)
virLXCProcessAutostartAll(lxc_driver);
virObjectUnref(caps);
return VIR_DRV_STATE_INIT_COMPLETE;
cleanup:
virObjectUnref(caps);
lxcStateCleanup();
return VIR_DRV_STATE_INIT_ERROR;
}
static void lxcNotifyLoadDomain(virDomainObjPtr vm, int newVM, void *opaque)
{
virLXCDriverPtr driver = opaque;
if (newVM) {
virObjectEventPtr event =
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
VIR_DOMAIN_EVENT_DEFINED_ADDED);
virObjectEventStateQueue(driver->domainEventState, event);
}
}
/**
* lxcStateReload:
*
* Function to restart the LXC driver, it will recheck the configuration
* files and perform autostart
*/
static int
lxcStateReload(void)
{
virLXCDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
if (!lxc_driver)
return 0;
if (!(caps = virLXCDriverGetCapabilities(lxc_driver, false)))
return -1;
cfg = virLXCDriverGetConfig(lxc_driver);
virDomainObjListLoadAllConfigs(lxc_driver->domains,
cfg->configDir,
cfg->autostartDir, false,
caps,
lxc_driver->xmlopt,
lxcNotifyLoadDomain, lxc_driver);
virObjectUnref(caps);
virObjectUnref(cfg);
return 0;
}
static int lxcStateCleanup(void)
{
if (lxc_driver == NULL)
return -1;
virObjectUnref(lxc_driver->domains);
virObjectUnref(lxc_driver->domainEventState);
virObjectUnref(lxc_driver->closeCallbacks);
virSysinfoDefFree(lxc_driver->hostsysinfo);
virObjectUnref(lxc_driver->hostdevMgr);
virObjectUnref(lxc_driver->caps);
virObjectUnref(lxc_driver->securityManager);
virObjectUnref(lxc_driver->xmlopt);
if (lxc_driver->lockFD != -1)
virPidFileRelease(lxc_driver->config->stateDir, "driver", lxc_driver->lockFD);
virObjectUnref(lxc_driver->config);
virMutexDestroy(&lxc_driver->lock);
VIR_FREE(lxc_driver);
return 0;
}
static int
lxcConnectSupportsFeature(virConnectPtr conn, int feature)
{
if (virConnectSupportsFeatureEnsureACL(conn) < 0)
return -1;
switch ((virDrvFeature) feature) {
case VIR_DRV_FEATURE_TYPED_PARAM_STRING:
return 1;
case VIR_DRV_FEATURE_FD_PASSING:
case VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION:
case VIR_DRV_FEATURE_MIGRATION_DIRECT:
case VIR_DRV_FEATURE_MIGRATION_OFFLINE:
case VIR_DRV_FEATURE_MIGRATION_P2P:
case VIR_DRV_FEATURE_MIGRATION_PARAMS:
case VIR_DRV_FEATURE_MIGRATION_V1:
case VIR_DRV_FEATURE_MIGRATION_V2:
case VIR_DRV_FEATURE_MIGRATION_V3:
case VIR_DRV_FEATURE_PROGRAM_KEEPALIVE:
case VIR_DRV_FEATURE_REMOTE:
case VIR_DRV_FEATURE_REMOTE_CLOSE_CALLBACK:
case VIR_DRV_FEATURE_REMOTE_EVENT_CALLBACK:
case VIR_DRV_FEATURE_XML_MIGRATABLE:
default:
return 0;
}
}
static int lxcConnectGetVersion(virConnectPtr conn, unsigned long *version)
{
struct utsname ver;
uname(&ver);
if (virConnectGetVersionEnsureACL(conn) < 0)
return -1;
if (virParseVersionString(ver.release, version, true) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, _("Unknown release: %s"), ver.release);
return -1;
}
return 0;
}
static char *lxcConnectGetHostname(virConnectPtr conn)
{
if (virConnectGetHostnameEnsureACL(conn) < 0)
return NULL;
return virGetHostname();
}
static char *lxcDomainGetSchedulerType(virDomainPtr dom,
int *nparams)
{
char *ret = NULL;
virDomainObjPtr vm;
virLXCDomainObjPrivatePtr priv;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetSchedulerTypeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
/* Domain not running, thus no cgroups - return defaults */
if (!virDomainObjIsActive(vm)) {
if (nparams)
*nparams = 3;
ret = g_strdup("posix");
goto cleanup;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (nparams) {
if (virCgroupSupportsCpuBW(priv->cgroup))
*nparams = 3;
else
*nparams = 1;
}
ret = g_strdup("posix");
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcGetVcpuBWLive(virCgroupPtr cgroup, unsigned long long *period,
long long *quota)
{
if (virCgroupGetCpuCfsPeriod(cgroup, period) < 0)
return -1;
if (virCgroupGetCpuCfsQuota(cgroup, quota) < 0)
return -1;
return 0;
}
static int lxcSetVcpuBWLive(virCgroupPtr cgroup, unsigned long long period,
long long quota)
{
unsigned long long old_period;
if (period == 0 && quota == 0)
return 0;
if (period) {
/* get old period, and we can rollback if set quota failed */
if (virCgroupGetCpuCfsPeriod(cgroup, &old_period) < 0)
return -1;
if (virCgroupSetCpuCfsPeriod(cgroup, period) < 0)
return -1;
}
if (quota) {
if (virCgroupSetCpuCfsQuota(cgroup, quota) < 0)
goto error;
}
return 0;
error:
if (period) {
virErrorPtr saved;
virErrorPreserveLast(&saved);
virCgroupSetCpuCfsPeriod(cgroup, old_period);
virErrorRestore(&saved);
}
return -1;
}
static int
lxcDomainSetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virCapsPtr caps = NULL;
size_t i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDefCopy = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
int rc;
virLXCDomainObjPrivatePtr priv;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_SCHEDULER_CPU_SHARES,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_VCPU_PERIOD,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_VCPU_QUOTA,
VIR_TYPED_PARAM_LLONG,
NULL) < 0)
return -1;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainSetSchedulerParametersFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (persistentDef) {
/* Make a copy for updated domain. */
persistentDefCopy = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt, NULL);
if (!persistentDefCopy)
goto endjob;
}
if (def) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto endjob;
}
}
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_CPU_SHARES)) {
if (def) {
unsigned long long val;
if (virCgroupSetCpuShares(priv->cgroup, params[i].value.ul) < 0)
goto endjob;
if (virCgroupGetCpuShares(priv->cgroup, &val) < 0)
goto endjob;
def->cputune.shares = val;
def->cputune.sharesSpecified = true;
}
if (persistentDef) {
persistentDefCopy->cputune.shares = params[i].value.ul;
persistentDefCopy->cputune.sharesSpecified = true;
}
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD)) {
if (def) {
rc = lxcSetVcpuBWLive(priv->cgroup, params[i].value.ul, 0);
if (rc != 0)
goto endjob;
if (params[i].value.ul)
def->cputune.period = params[i].value.ul;
}
if (persistentDef)
persistentDefCopy->cputune.period = params[i].value.ul;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_QUOTA)) {
if (def) {
rc = lxcSetVcpuBWLive(priv->cgroup, 0, params[i].value.l);
if (rc != 0)
goto endjob;
if (params[i].value.l)
def->cputune.quota = params[i].value.l;
}
if (persistentDef)
persistentDefCopy->cputune.quota = params[i].value.l;
}
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
if (persistentDef) {
rc = virDomainSaveConfig(cfg->configDir, driver->caps, persistentDefCopy);
if (rc < 0)
goto endjob;
virDomainObjAssignDef(vm, persistentDefCopy, false, NULL);
persistentDefCopy = NULL;
}
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(persistentDefCopy);
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
lxcDomainSetSchedulerParameters(virDomainPtr domain,
virTypedParameterPtr params,
int nparams)
{
return lxcDomainSetSchedulerParametersFlags(domain, params, nparams, 0);
}
static int
lxcDomainGetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
unsigned long long shares = 0;
unsigned long long period = 0;
long long quota = 0;
int ret = -1;
int rc;
bool cpu_bw_status = false;
int saved_nparams = 0;
virLXCDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetSchedulerParametersFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (*nparams > 1)
cpu_bw_status = virCgroupSupportsCpuBW(priv->cgroup);
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto cleanup;
if (persistentDef) {
shares = persistentDef->cputune.shares;
if (*nparams > 1) {
period = persistentDef->cputune.period;
quota = persistentDef->cputune.quota;
cpu_bw_status = true; /* Allow copy of data to params[] */
}
goto out;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (virCgroupGetCpuShares(priv->cgroup, &shares) < 0)
goto cleanup;
if (*nparams > 1 && cpu_bw_status) {
rc = lxcGetVcpuBWLive(priv->cgroup, &period, &quota);
if (rc != 0)
goto cleanup;
}
out:
if (virTypedParameterAssign(&params[0], VIR_DOMAIN_SCHEDULER_CPU_SHARES,
VIR_TYPED_PARAM_ULLONG, shares) < 0)
goto cleanup;
saved_nparams++;
if (cpu_bw_status) {
if (*nparams > saved_nparams) {
if (virTypedParameterAssign(&params[1],
VIR_DOMAIN_SCHEDULER_VCPU_PERIOD,
VIR_TYPED_PARAM_ULLONG, period) < 0)
goto cleanup;
saved_nparams++;
}
if (*nparams > saved_nparams) {
if (virTypedParameterAssign(&params[2],
VIR_DOMAIN_SCHEDULER_VCPU_QUOTA,
VIR_TYPED_PARAM_LLONG, quota) < 0)
goto cleanup;
saved_nparams++;
}
}
*nparams = saved_nparams;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainGetSchedulerParameters(virDomainPtr domain,
virTypedParameterPtr params,
int *nparams)
{
return lxcDomainGetSchedulerParametersFlags(domain, params, nparams, 0);
}
static int
lxcDomainParseBlkioDeviceStr(char *blkioDeviceStr, const char *type,
virBlkioDevicePtr *dev, size_t *size)
{
char *temp;
int ndevices = 0;
int nsep = 0;
size_t i;
virBlkioDevicePtr result = NULL;
*dev = NULL;
*size = 0;
if (STREQ(blkioDeviceStr, ""))
return 0;
temp = blkioDeviceStr;
while (temp) {
temp = strchr(temp, ',');
if (temp) {
temp++;
nsep++;
}
}
/* A valid string must have even number of fields, hence an odd
* number of commas. */
if (!(nsep & 1))
goto parse_error;
ndevices = (nsep + 1) / 2;
if (VIR_ALLOC_N(result, ndevices) < 0)
return -1;
i = 0;
temp = blkioDeviceStr;
while (temp) {
char *p = temp;
/* device path */
p = strchr(p, ',');
if (!p)
goto parse_error;
if (VIR_STRNDUP(result[i].path, temp, p - temp) < 0)
goto cleanup;
/* value */
temp = p + 1;
if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
if (virStrToLong_uip(temp, &p, 10, &result[i].weight) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
if (virStrToLong_uip(temp, &p, 10, &result[i].riops) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
if (virStrToLong_uip(temp, &p, 10, &result[i].wiops) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
if (virStrToLong_ullp(temp, &p, 10, &result[i].rbps) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
if (virStrToLong_ullp(temp, &p, 10, &result[i].wbps) < 0)
goto number_error;
} else {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown parameter '%s'"), type);
goto cleanup;
}
i++;
if (*p == '\0')
break;
else if (*p != ',')
goto parse_error;
temp = p + 1;
}
if (!i)
VIR_FREE(result);
*dev = result;
*size = i;
return 0;
parse_error:
virReportError(VIR_ERR_INVALID_ARG,
_("unable to parse blkio device '%s' '%s'"),
type, blkioDeviceStr);
goto cleanup;
number_error:
virReportError(VIR_ERR_INVALID_ARG,
_("invalid value '%s' for parameter '%s' of device '%s'"),
temp, type, result[i].path);
cleanup:
if (result) {
virBlkioDeviceArrayClear(result, ndevices);
VIR_FREE(result);
}
return -1;
}
static int
lxcDomainMergeBlkioDevice(virBlkioDevicePtr *dest_array,
size_t *dest_size,
virBlkioDevicePtr src_array,
size_t src_size,
const char *type)
{
size_t i, j;
virBlkioDevicePtr dest, src;
for (i = 0; i < src_size; i++) {
bool found = false;
src = &src_array[i];
for (j = 0; j < *dest_size; j++) {
dest = &(*dest_array)[j];
if (STREQ(src->path, dest->path)) {
found = true;
if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
dest->weight = src->weight;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
dest->riops = src->riops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
dest->wiops = src->wiops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
dest->rbps = src->rbps;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
dest->wbps = src->wbps;
} else {
virReportError(VIR_ERR_INVALID_ARG, _("Unknown parameter %s"),
type);
return -1;
}
break;
}
}
if (!found) {
if (!src->weight && !src->riops && !src->wiops && !src->rbps && !src->wbps)
continue;
if (VIR_EXPAND_N(*dest_array, *dest_size, 1) < 0)
return -1;
dest = &(*dest_array)[*dest_size - 1];
if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
dest->weight = src->weight;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
dest->riops = src->riops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
dest->wiops = src->wiops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
dest->rbps = src->rbps;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
dest->wbps = src->wbps;
} else {
*dest_size = *dest_size - 1;
return -1;
}
dest->path = src->path;
src->path = NULL;
}
}
return 0;
}
static int
lxcDomainBlockStats(virDomainPtr dom,
const char *path,
virDomainBlockStatsPtr stats)
{
virLXCDriverPtr driver = dom->conn->privateData;
int ret = -1;
virDomainObjPtr vm;
virDomainDiskDefPtr disk = NULL;
virLXCDomainObjPrivatePtr priv;
if (!(vm = lxcDomObjFromDomain(dom)))
return ret;
priv = vm->privateData;
if (virDomainBlockStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("blkio cgroup isn't mounted"));
goto endjob;
}
if (!*path) {
/* empty path - return entire domain blkstats instead */
ret = virCgroupGetBlkioIoServiced(priv->cgroup,
&stats->rd_bytes,
&stats->wr_bytes,
&stats->rd_req,
&stats->wr_req);
goto endjob;
}
if (!(disk = virDomainDiskByName(vm->def, path, false))) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto endjob;
}
if (!disk->info.alias) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"), disk->dst);
goto endjob;
}
ret = virCgroupGetBlkioIoDeviceServiced(priv->cgroup,
disk->info.alias,
&stats->rd_bytes,
&stats->wr_bytes,
&stats->rd_req,
&stats->wr_req);
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainBlockStatsFlags(virDomainPtr dom,
const char * path,
virTypedParameterPtr params,
int * nparams,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
int tmp, ret = -1;
virDomainObjPtr vm;
virDomainDiskDefPtr disk = NULL;
virLXCDomainObjPrivatePtr priv;
long long rd_req, rd_bytes, wr_req, wr_bytes;
virTypedParameterPtr param;
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!*nparams) {
*nparams = LXC_NB_DOMAIN_BLOCK_STAT_PARAM;
return 0;
}
if (!(vm = lxcDomObjFromDomain(dom)))
return ret;
priv = vm->privateData;
if (virDomainBlockStatsFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("blkio cgroup isn't mounted"));
goto endjob;
}
if (!*path) {
/* empty path - return entire domain blkstats instead */
if (virCgroupGetBlkioIoServiced(priv->cgroup,
&rd_bytes,
&wr_bytes,
&rd_req,
&wr_req) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("domain stats query failed"));
goto endjob;
}
} else {
if (!(disk = virDomainDiskByName(vm->def, path, false))) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto endjob;
}
if (!disk->info.alias) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"), disk->dst);
goto endjob;
}
if (virCgroupGetBlkioIoDeviceServiced(priv->cgroup,
disk->info.alias,
&rd_bytes,
&wr_bytes,
&rd_req,
&wr_req) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("domain stats query failed"));
goto endjob;
}
}
tmp = 0;
ret = -1;
if (tmp < *nparams && wr_bytes != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_WRITE_BYTES,
VIR_TYPED_PARAM_LLONG, wr_bytes) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && wr_req != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_WRITE_REQ,
VIR_TYPED_PARAM_LLONG, wr_req) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && rd_bytes != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_READ_BYTES,
VIR_TYPED_PARAM_LLONG, rd_bytes) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && rd_req != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_READ_REQ,
VIR_TYPED_PARAM_LLONG, rd_req) < 0)
goto endjob;
tmp++;
}
ret = 0;
*nparams = tmp;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainSetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
size_t i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = NULL;
virLXCDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_READ_BPS,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS,
VIR_TYPED_PARAM_STRING,
NULL) < 0)
return -1;
if (!(vm = lxcDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virLXCDriverGetConfig(driver);
if (virDomainSetBlkioParametersEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("blkio cgroup isn't mounted"));
goto endjob;
}
}
ret = 0;
if (def) {
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) {
if (virCgroupSetBlkioWeight(priv->cgroup, params[i].value.ui) < 0)
ret = -1;
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
size_t ndevices;
virBlkioDevicePtr devices = NULL;
size_t j;
if (lxcDomainParseBlkioDeviceStr(params[i].value.s,
param->field,
&devices,
&ndevices) < 0) {
ret = -1;
continue;
}
if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceWeight(priv->cgroup,
devices[j].path,
devices[j].weight) < 0 ||
virCgroupGetBlkioDeviceWeight(priv->cgroup,
devices[j].path,
&devices[j].weight) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceReadIops(priv->cgroup,
devices[j].path,
devices[j].riops) < 0 ||
virCgroupGetBlkioDeviceReadIops(priv->cgroup,
devices[j].path,
&devices[j].riops) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceWriteIops(priv->cgroup,
devices[j].path,
devices[j].wiops) < 0 ||
virCgroupGetBlkioDeviceWriteIops(priv->cgroup,
devices[j].path,
&devices[j].wiops) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceReadBps(priv->cgroup,
devices[j].path,
devices[j].rbps) < 0 ||
virCgroupGetBlkioDeviceReadBps(priv->cgroup,
devices[j].path,
&devices[j].rbps) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceWriteBps(priv->cgroup,
devices[j].path,
devices[j].wbps) < 0 ||
virCgroupGetBlkioDeviceWriteBps(priv->cgroup,
devices[j].path,
&devices[j].wbps) < 0) {
ret = -1;
break;
}
}
} else {
virReportError(VIR_ERR_INVALID_ARG, _("Unknown blkio parameter %s"),
param->field);
ret = -1;
virBlkioDeviceArrayClear(devices, ndevices);
VIR_FREE(devices);
continue;
}
if (j != ndevices ||
lxcDomainMergeBlkioDevice(&def->blkio.devices,
&def->blkio.ndevices,
devices, ndevices, param->field) < 0)
ret = -1;
virBlkioDeviceArrayClear(devices, ndevices);
VIR_FREE(devices);
}
}
}
if (ret < 0)
goto endjob;
if (persistentDef) {
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) {
persistentDef->blkio.weight = params[i].value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
virBlkioDevicePtr devices = NULL;
size_t ndevices;
if (lxcDomainParseBlkioDeviceStr(params[i].value.s,
param->field,
&devices,
&ndevices) < 0) {
ret = -1;
continue;
}
if (lxcDomainMergeBlkioDevice(&persistentDef->blkio.devices,
&persistentDef->blkio.ndevices,
devices, ndevices, param->field) < 0)
ret = -1;
virBlkioDeviceArrayClear(devices, ndevices);
VIR_FREE(devices);
}
}
if (virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
ret = -1;
}
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
#define LXC_NB_BLKIO_PARAM 6
static int
lxcDomainGetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
int maxparams = LXC_NB_BLKIO_PARAM;
unsigned int val;
int ret = -1;
virLXCDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We blindly return a string, and let libvirt.c and
* remote_driver.c do the filtering on behalf of older clients
* that can't parse it. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = lxcDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
if (virDomainGetBlkioParametersEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if ((*nparams) == 0) {
/* Current number of blkio parameters supported by cgroups */
*nparams = LXC_NB_BLKIO_PARAM;
ret = 0;
goto cleanup;
} else if (*nparams < maxparams) {
maxparams = *nparams;
}
*nparams = 0;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto cleanup;
if (def) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("blkio cgroup isn't mounted"));
goto cleanup;
}
/* fill blkio weight here */
if (virCgroupGetBlkioWeight(priv->cgroup, &val) < 0)
goto cleanup;
if (virTypedParameterAssign(&(params[(*nparams)++]),
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT, val) < 0)
goto cleanup;
if (virDomainGetBlkioParametersAssignFromDef(def, params, nparams,
maxparams) < 0)
goto cleanup;
} else if (persistentDef) {
/* fill blkio weight here */
if (virTypedParameterAssign(&(params[(*nparams)++]),
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT,
persistentDef->blkio.weight) < 0)
goto cleanup;
if (virDomainGetBlkioParametersAssignFromDef(persistentDef, params,
nparams, maxparams) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainInterfaceStats(virDomainPtr dom,
const char *device,
virDomainInterfaceStatsPtr stats)
{
virDomainObjPtr vm;
int ret = -1;
virLXCDriverPtr driver = dom->conn->privateData;
virDomainNetDefPtr net = NULL;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainInterfaceStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (!(net = virDomainNetFind(vm->def, device)))
goto endjob;
if (virNetDevTapInterfaceStats(net->ifname, stats,
!virDomainNetTypeSharesHostView(net)) < 0)
goto endjob;
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int lxcDomainGetAutostart(virDomainPtr dom,
int *autostart)
{
virDomainObjPtr vm;
int ret = -1;
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetAutostartEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*autostart = vm->autostart;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int lxcDomainSetAutostart(virDomainPtr dom,
int autostart)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
char *configFile = NULL, *autostartLink = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainSetAutostartEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("Cannot set autostart for transient domain"));
goto endjob;
}
autostart = (autostart != 0);
if (vm->autostart == autostart) {
ret = 0;
goto endjob;
}
configFile = virDomainConfigFile(cfg->configDir,
vm->def->name);
if (configFile == NULL)
goto endjob;
autostartLink = virDomainConfigFile(cfg->autostartDir,
vm->def->name);
if (autostartLink == NULL)
goto endjob;
if (autostart) {
if (virFileMakePath(cfg->autostartDir) < 0) {
virReportSystemError(errno,
_("Cannot create autostart directory %s"),
cfg->autostartDir);
goto endjob;
}
if (symlink(configFile, autostartLink) < 0) {
virReportSystemError(errno,
_("Failed to create symlink '%s to '%s'"),
autostartLink, configFile);
goto endjob;
}
} else {
if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
virReportSystemError(errno,
_("Failed to delete symlink '%s'"),
autostartLink);
goto endjob;
}
}
vm->autostart = autostart;
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(configFile);
VIR_FREE(autostartLink);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int lxcFreezeContainer(virDomainObjPtr vm)
{
int timeout = 1000; /* In milliseconds */
int check_interval = 1; /* In milliseconds */
int exp = 10;
int waited_time = 0;
int ret = -1;
char *state = NULL;
virLXCDomainObjPrivatePtr priv = vm->privateData;
while (waited_time < timeout) {
int r;
/*
* Writing "FROZEN" to the "freezer.state" freezes the group,
* i.e., the container, temporarily transiting "FREEZING" state.
* Once the freezing is completed, the state of the group transits
* to "FROZEN".
* (see linux-2.6/Documentation/cgroups/freezer-subsystem.txt)
*/
r = virCgroupSetFreezerState(priv->cgroup, "FROZEN");
/*
* Returning EBUSY explicitly indicates that the group is
* being frozen but incomplete, and other errors are true
* errors.
*/
if (r < 0 && r != -EBUSY) {
VIR_DEBUG("Writing freezer.state failed with errno: %d", r);
goto error;
}
if (r == -EBUSY)
VIR_DEBUG("Writing freezer.state gets EBUSY");
/*
* Unfortunately, returning 0 (success) is likely to happen
* even when the freezing has not been completed. Sometimes
* the state of the group remains "FREEZING" like when
* returning -EBUSY and even worse may never transit to
* "FROZEN" even if writing "FROZEN" again.
*
* So we don't trust the return value anyway and always
* decide that the freezing has been complete only with
* the state actually transit to "FROZEN".
*/
g_usleep(check_interval * 1000);
r = virCgroupGetFreezerState(priv->cgroup, &state);
if (r < 0) {
VIR_DEBUG("Reading freezer.state failed with errno: %d", r);
goto error;
}
VIR_DEBUG("Read freezer.state: %s", state);
if (STREQ(state, "FROZEN")) {
ret = 0;
goto cleanup;
}
waited_time += check_interval;
/*
* Increasing check_interval exponentially starting with
* small initial value treats nicely two cases; One is
* a container is under no load and waiting for long period
* makes no sense. The other is under heavy load. The container
* may stay longer time in FREEZING or never transit to FROZEN.
* In that case, eager polling will just waste CPU time.
*/
check_interval *= exp;
VIR_FREE(state);
}
VIR_DEBUG("lxcFreezeContainer timeout");
error:
/*
* If timeout or an error on reading the state occurs,
* activate the group again and return an error.
* This is likely to fall the group back again gracefully.
*/
virCgroupSetFreezerState(priv->cgroup, "THAWED");
ret = -1;
cleanup:
VIR_FREE(state);
return ret;
}
static int lxcDomainSuspend(virDomainPtr dom)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainSuspendEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (virDomainObjGetState(vm, NULL) != VIR_DOMAIN_PAUSED) {
if (lxcFreezeContainer(vm) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Suspend operation failed"));
goto endjob;
}
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_USER);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_PAUSED);
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virObjectEventStateQueue(driver->domainEventState, event);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int lxcDomainResume(virDomainPtr dom)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
int state;
virLXCDomainObjPrivatePtr priv;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainResumeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
state = virDomainObjGetState(vm, NULL);
if (state == VIR_DOMAIN_RUNNING) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is already running"));
goto endjob;
} else if (state == VIR_DOMAIN_PAUSED) {
if (virCgroupSetFreezerState(priv->cgroup, "THAWED") < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Resume operation failed"));
goto endjob;
}
virDomainObjSetState(vm, VIR_DOMAIN_RUNNING,
VIR_DOMAIN_RUNNING_UNPAUSED);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_UNPAUSED);
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virObjectEventStateQueue(driver->domainEventState, event);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
lxcDomainOpenConsole(virDomainPtr dom,
const char *dev_name,
virStreamPtr st,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainChrDefPtr chr = NULL;
size_t i;
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainOpenConsoleEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto cleanup;
if (dev_name) {
for (i = 0; i < vm->def->nconsoles; i++) {
if (vm->def->consoles[i]->info.alias &&
STREQ(vm->def->consoles[i]->info.alias, dev_name)) {
chr = vm->def->consoles[i];
break;
}
}
} else {
if (vm->def->nconsoles)
chr = vm->def->consoles[0];
else if (vm->def->nserials)
chr = vm->def->serials[0];
}
if (!chr) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find console device '%s'"),
dev_name ? dev_name : _("default"));
goto cleanup;
}
if (chr->source->type != VIR_DOMAIN_CHR_TYPE_PTY) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("character device %s is not using a PTY"),
dev_name ? dev_name : NULLSTR(chr->info.alias));
goto cleanup;
}
if (virFDStreamOpenFile(st, chr->source->data.file.path,
0, 0, O_RDWR) < 0)
goto cleanup;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainSendProcessSignal(virDomainPtr dom,
long long pid_value,
unsigned int signum,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virLXCDomainObjPrivatePtr priv;
pid_t victim;
int ret = -1;
virCheckFlags(0, -1);
if (signum >= VIR_DOMAIN_PROCESS_SIGNAL_LAST) {
virReportError(VIR_ERR_INVALID_ARG,
_("signum value %d is out of range"),
signum);
return -1;
}
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainSendProcessSignalEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
/*
* XXX if the kernel has /proc/$PID/ns/pid we can
* switch into container namespace & that way be
* able to kill any PID. Alternatively if there
* is a way to find a mapping of guest<->host PIDs
* we can kill that way.
*/
if (pid_value != 1) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Only the init process may be killed"));
goto endjob;
}
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Init pid is not yet available"));
goto endjob;
}
victim = priv->initpid;
/* We're relying on fact libvirt header signal numbers
* are taken from Linux, to avoid mapping
*/
if (kill(victim, signum) < 0) {
virReportSystemError(errno,
_("Unable to send %d signal to process %d"),
signum, victim);
goto endjob;
}
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcConnectListAllDomains(virConnectPtr conn,
virDomainPtr **domains,
unsigned int flags)
{
virLXCDriverPtr driver = conn->privateData;
int ret = -1;
virCheckFlags(VIR_CONNECT_LIST_DOMAINS_FILTERS_ALL, -1);
if (virConnectListAllDomainsEnsureACL(conn) < 0)
return -1;
ret = virDomainObjListExport(driver->domains, conn, domains,
virConnectListAllDomainsCheckACL, flags);
return ret;
}
static int
lxcDomainShutdownFlags(virDomainPtr dom,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virLXCDomainObjPrivatePtr priv;
virDomainObjPtr vm;
int ret = -1;
int rc = -1;
virCheckFlags(VIR_DOMAIN_SHUTDOWN_INITCTL |
VIR_DOMAIN_SHUTDOWN_SIGNAL, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainShutdownFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (priv->initpid == 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("Init process ID is not yet known"));
goto endjob;
}
if (flags == 0 ||
(flags & VIR_DOMAIN_SHUTDOWN_INITCTL)) {
int command = VIR_INITCTL_RUNLEVEL_POWEROFF;
if ((rc = virLXCDomainSetRunlevel(vm, command)) < 0) {
if (flags != 0 &&
(flags & VIR_DOMAIN_SHUTDOWN_INITCTL)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Container does not provide an initctl pipe"));
goto endjob;
}
}
}
if (rc < 0 &&
(flags == 0 ||
(flags & VIR_DOMAIN_SHUTDOWN_SIGNAL))) {
if (kill(priv->initpid, SIGTERM) < 0 &&
errno != ESRCH) {
virReportSystemError(errno,
_("Unable to send SIGTERM to init pid %llu"),
(long long)priv->initpid);
goto endjob;
}
}
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainShutdown(virDomainPtr dom)
{
return lxcDomainShutdownFlags(dom, 0);
}
static int
lxcDomainReboot(virDomainPtr dom,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virLXCDomainObjPrivatePtr priv;
virDomainObjPtr vm;
int ret = -1;
int rc = -1;
virCheckFlags(VIR_DOMAIN_REBOOT_INITCTL |
VIR_DOMAIN_REBOOT_SIGNAL, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainRebootEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (priv->initpid == 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("Init process ID is not yet known"));
goto endjob;
}
if (flags == 0 ||
(flags & VIR_DOMAIN_REBOOT_INITCTL)) {
int command = VIR_INITCTL_RUNLEVEL_REBOOT;
if ((rc = virLXCDomainSetRunlevel(vm, command)) < 0) {
if (flags != 0 &&
(flags & VIR_DOMAIN_REBOOT_INITCTL)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Container does not provide an initctl pipe"));
goto endjob;
}
}
}
if (rc < 0 &&
(flags == 0 ||
(flags & VIR_DOMAIN_REBOOT_SIGNAL))) {
if (kill(priv->initpid, SIGHUP) < 0 &&
errno != ESRCH) {
virReportSystemError(errno,
_("Unable to send SIGTERM to init pid %llu"),
(long long)priv->initpid);
goto endjob;
}
}
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainAttachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
int ret = -1;
virDomainDiskDefPtr disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
if (virDomainDiskIndexByName(vmdef, disk->dst, true) >= 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("target %s already exists."), disk->dst);
return -1;
}
if (virDomainDiskInsert(vmdef, disk) < 0)
return -1;
/* vmdef has the pointer. Generic codes for vmdef will do all jobs */
dev->data.disk = NULL;
ret = 0;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if (virDomainNetInsert(vmdef, net) < 0)
goto cleanup;
dev->data.net = NULL;
ret = 0;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
hostdev = dev->data.hostdev;
if (virDomainHostdevFind(vmdef, hostdev, NULL) >= 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("device is already in the domain configuration"));
return -1;
}
if (virDomainHostdevInsert(vmdef, hostdev) < 0)
return -1;
dev->data.hostdev = NULL;
ret = 0;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent attach of device is not supported"));
break;
}
cleanup:
return ret;
}
static int
lxcDomainUpdateDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
int ret = -1;
virDomainNetDefPtr net;
virDomainDeviceDef oldDev = { .type = dev->type };
int idx;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if ((idx = virDomainNetFindIdx(vmdef, net)) < 0)
goto cleanup;
oldDev.data.net = vmdef->nets[idx];
if (virDomainDefCompatibleDevice(vmdef, dev, &oldDev,
VIR_DOMAIN_DEVICE_ACTION_UPDATE,
false) < 0)
return -1;
if (virDomainNetUpdate(vmdef, idx, net) < 0)
return -1;
virDomainNetDefFree(oldDev.data.net);
dev->data.net = NULL;
ret = 0;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent update of device is not supported"));
break;
}
cleanup:
return ret;
}
static int
lxcDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
int ret = -1;
virDomainDiskDefPtr disk, det_disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev, det_hostdev;
int idx;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
if (!(det_disk = virDomainDiskRemoveByName(vmdef, disk->dst))) {
virReportError(VIR_ERR_INVALID_ARG,
_("no target device %s"), disk->dst);
return -1;
}
virDomainDiskDefFree(det_disk);
ret = 0;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if ((idx = virDomainNetFindIdx(vmdef, net)) < 0)
goto cleanup;
/* this is guaranteed to succeed */
virDomainNetDefFree(virDomainNetRemove(vmdef, idx));
ret = 0;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV: {
hostdev = dev->data.hostdev;
if ((idx = virDomainHostdevFind(vmdef, hostdev, &det_hostdev)) < 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("device not present in domain configuration"));
return -1;
}
virDomainHostdevRemove(vmdef, idx);
virDomainHostdevDefFree(det_hostdev);
ret = 0;
break;
}
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent detach of device is not supported"));
break;
}
cleanup:
return ret;
}
struct lxcDomainAttachDeviceMknodData {
virLXCDriverPtr driver;
mode_t mode;
dev_t dev;
virDomainObjPtr vm;
virDomainDeviceDefPtr def;
char *file;
};
static int
lxcDomainAttachDeviceMknodHelper(pid_t pid G_GNUC_UNUSED,
void *opaque)
{
struct lxcDomainAttachDeviceMknodData *data = opaque;
int ret = -1;
virSecurityManagerPostFork(data->driver->securityManager);
if (virFileMakeParentPath(data->file) < 0) {
virReportSystemError(errno,
_("Unable to create %s"), data->file);
goto cleanup;
}
/* Yes, the device name we're creating may not
* actually correspond to the major:minor number
* we're using, but we've no other option at this
* time. Just have to hope that containerized apps
* don't get upset that the major:minor is different
* to that normally implied by the device name
*/
VIR_DEBUG("Creating dev %s (%d,%d)",
data->file, major(data->dev), minor(data->dev));
if (mknod(data->file, data->mode, data->dev) < 0) {
virReportSystemError(errno,
_("Unable to create device %s"),
data->file);
goto cleanup;
}
if (lxcContainerChown(data->vm->def, data->file) < 0)
goto cleanup;
/* Labelling normally operates on src, but we need
* to actually label the dst here, so hack the config */
switch (data->def->type) {
case VIR_DOMAIN_DEVICE_DISK: {
virDomainDiskDefPtr def = data->def->data.disk;
char *tmpsrc = def->src->path;
def->src->path = data->file;
if (virSecurityManagerSetImageLabel(data->driver->securityManager,
data->vm->def, def->src,
VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN) < 0) {
def->src->path = tmpsrc;
goto cleanup;
}
def->src->path = tmpsrc;
} break;
case VIR_DOMAIN_DEVICE_HOSTDEV: {
virDomainHostdevDefPtr def = data->def->data.hostdev;
if (virSecurityManagerSetHostdevLabel(data->driver->securityManager,
data->vm->def, def, NULL) < 0)
goto cleanup;
} break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unexpected device type %d"),
data->def->type);
goto cleanup;
}
ret = 0;
cleanup:
if (ret < 0)
unlink(data->file);
return ret;
}
static int
lxcDomainAttachDeviceMknod(virLXCDriverPtr driver,
mode_t mode,
dev_t dev,
virDomainObjPtr vm,
virDomainDeviceDefPtr def,
char *file)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
struct lxcDomainAttachDeviceMknodData data;
memset(&data, 0, sizeof(data));
data.driver = driver;
data.mode = mode;
data.dev = dev;
data.vm = vm;
data.def = def;
data.file = file;
if (virSecurityManagerPreFork(driver->securityManager) < 0)
return -1;
if (virProcessRunInMountNamespace(priv->initpid,
lxcDomainAttachDeviceMknodHelper,
&data) < 0) {
virSecurityManagerPostFork(driver->securityManager);
return -1;
}
virSecurityManagerPostFork(driver->securityManager);
return 0;
}
static int
lxcDomainAttachDeviceUnlinkHelper(pid_t pid G_GNUC_UNUSED,
void *opaque)
{
const char *path = opaque;
VIR_DEBUG("Unlinking %s", path);
if (unlink(path) < 0 && errno != ENOENT) {
virReportSystemError(errno,
_("Unable to remove device %s"), path);
return -1;
}
return 0;
}
static int
lxcDomainAttachDeviceUnlink(virDomainObjPtr vm,
char *file)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
if (virProcessRunInMountNamespace(priv->initpid,
lxcDomainAttachDeviceUnlinkHelper,
file) < 0) {
return -1;
}
return 0;
}
static int
lxcDomainAttachDeviceDiskLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainDiskDefPtr def = dev->data.disk;
int ret = -1;
struct stat sb;
char *file = NULL;
int perms;
const char *src = NULL;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach disk until init PID is known"));
goto cleanup;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICES)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("devices cgroup isn't mounted"));
goto cleanup;
}
src = virDomainDiskGetSource(def);
if (src == NULL) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Can't setup disk without media"));
goto cleanup;
}
if (!virStorageSourceIsBlockLocal(def->src)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Can't setup disk for non-block device"));
goto cleanup;
}
if (virDomainDiskIndexByName(vm->def, def->dst, true) >= 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("target %s already exists"), def->dst);
goto cleanup;
}
if (stat(src, &sb) < 0) {
virReportSystemError(errno,
_("Unable to access %s"), src);
goto cleanup;
}
if (!S_ISBLK(sb.st_mode)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Disk source %s must be a block device"),
src);
goto cleanup;
}
perms = (def->src->readonly ?
VIR_CGROUP_DEVICE_READ :
VIR_CGROUP_DEVICE_RW) |
VIR_CGROUP_DEVICE_MKNOD;
if (virCgroupAllowDevice(priv->cgroup,
'b',
major(sb.st_rdev),
minor(sb.st_rdev),
perms) < 0)
goto cleanup;
if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks + 1) < 0)
goto cleanup;
if (virAsprintf(&file,
"/dev/%s", def->dst) < 0)
goto cleanup;
if (lxcDomainAttachDeviceMknod(driver,
0700 | S_IFBLK,
sb.st_rdev,
vm,
dev,
file) < 0) {
if (virCgroupDenyDevice(priv->cgroup,
'b',
major(sb.st_rdev),
minor(sb.st_rdev),
perms) < 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
src, vm->def->name, virGetLastErrorMessage());
goto cleanup;
}
virDomainDiskInsertPreAlloced(vm->def, def);
ret = 0;
cleanup:
if (src)
virDomainAuditDisk(vm, NULL, def->src, "attach", ret == 0);
VIR_FREE(file);
return ret;
}
/* XXX conn required for network -> bridge resolution */
static int
lxcDomainAttachDeviceNetLive(virConnectPtr conn,
virDomainObjPtr vm,
virDomainNetDefPtr net)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
int ret = -1;
virDomainNetType actualType;
virNetDevBandwidthPtr actualBandwidth;
char *veth = NULL;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach disk until init PID is known"));
return -1;
}
if (virLXCProcessValidateInterface(net) < 0)
return -1;
/* preallocate new slot for device */
if (VIR_REALLOC_N(vm->def->nets, vm->def->nnets+1) < 0)
return -1;
/* If appropriate, grab a physical device from the configured
* network's pool of devices, or resolve bridge device name
* to the one defined in the network definition.
*/
if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
virConnectPtr netconn = virGetConnectNetwork();
if (!netconn)
return -1;
if (virDomainNetAllocateActualDevice(netconn, vm->def, net) < 0) {
virObjectUnref(netconn);
return -1;
}
virObjectUnref(netconn);
}
actualType = virDomainNetGetActualType(net);
switch (actualType) {
case VIR_DOMAIN_NET_TYPE_BRIDGE:
case VIR_DOMAIN_NET_TYPE_NETWORK: {
const char *brname = virDomainNetGetActualBridgeName(net);
if (!brname) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("No bridge name specified"));
goto cleanup;
}
if (!(veth = virLXCProcessSetupInterfaceTap(vm->def, net, brname)))
goto cleanup;
} break;
case VIR_DOMAIN_NET_TYPE_ETHERNET:
if (!(veth = virLXCProcessSetupInterfaceTap(vm->def, net, NULL)))
goto cleanup;
break;
case VIR_DOMAIN_NET_TYPE_DIRECT: {
if (!(veth = virLXCProcessSetupInterfaceDirect(conn, vm->def, net)))
goto cleanup;
} break;
case VIR_DOMAIN_NET_TYPE_USER:
case VIR_DOMAIN_NET_TYPE_VHOSTUSER:
case VIR_DOMAIN_NET_TYPE_SERVER:
case VIR_DOMAIN_NET_TYPE_CLIENT:
case VIR_DOMAIN_NET_TYPE_MCAST:
case VIR_DOMAIN_NET_TYPE_INTERNAL:
case VIR_DOMAIN_NET_TYPE_HOSTDEV:
case VIR_DOMAIN_NET_TYPE_UDP:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Network device type is not supported"));
goto cleanup;
case VIR_DOMAIN_NET_TYPE_LAST:
default:
virReportEnumRangeError(virDomainNetType, actualType);
goto cleanup;
}
/* Set bandwidth or warn if requested and not supported. */
actualBandwidth = virDomainNetGetActualBandwidth(net);
if (actualBandwidth) {
if (virNetDevSupportBandwidth(actualType)) {
if (virNetDevBandwidthSet(net->ifname, actualBandwidth, false,
!virDomainNetTypeSharesHostView(net)) < 0)
goto cleanup;
} else {
VIR_WARN("setting bandwidth on interfaces of "
"type '%s' is not implemented yet: %s",
virDomainNetTypeToString(actualType), virGetLastErrorMessage());
}
}
if (virNetDevSetNamespace(veth, priv->initpid) < 0) {
virDomainAuditNet(vm, NULL, net, "attach", false);
goto cleanup;
}
virDomainAuditNet(vm, NULL, net, "attach", true);
ret = 0;
cleanup:
if (!ret) {
vm->def->nets[vm->def->nnets++] = net;
} else if (veth) {
switch (actualType) {
case VIR_DOMAIN_NET_TYPE_BRIDGE:
case VIR_DOMAIN_NET_TYPE_NETWORK:
case VIR_DOMAIN_NET_TYPE_ETHERNET:
ignore_value(virNetDevVethDelete(veth));
break;
case VIR_DOMAIN_NET_TYPE_DIRECT:
ignore_value(virNetDevMacVLanDelete(veth));
break;
case VIR_DOMAIN_NET_TYPE_USER:
case VIR_DOMAIN_NET_TYPE_VHOSTUSER:
case VIR_DOMAIN_NET_TYPE_SERVER:
case VIR_DOMAIN_NET_TYPE_CLIENT:
case VIR_DOMAIN_NET_TYPE_MCAST:
case VIR_DOMAIN_NET_TYPE_INTERNAL:
case VIR_DOMAIN_NET_TYPE_HOSTDEV:
case VIR_DOMAIN_NET_TYPE_UDP:
case VIR_DOMAIN_NET_TYPE_LAST:
default:
/* no-op */
break;
}
}
return ret;
}
static int
lxcDomainAttachDeviceHostdevSubsysUSBLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainHostdevDefPtr def = dev->data.hostdev;
int ret = -1;
char *src = NULL;
struct stat sb;
virUSBDevicePtr usb = NULL;
virDomainHostdevSubsysUSBPtr usbsrc;
if (virDomainHostdevFind(vm->def, def, NULL) >= 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("host USB device already exists"));
return -1;
}
usbsrc = &def->source.subsys.u.usb;
if (virAsprintf(&src, "/dev/bus/usb/%03d/%03d",
usbsrc->bus, usbsrc->device) < 0)
goto cleanup;
if (!(usb = virUSBDeviceNew(usbsrc->bus, usbsrc->device, NULL)))
goto cleanup;
if (stat(src, &sb) < 0) {
virReportSystemError(errno,
_("Unable to access %s"), src);
goto cleanup;
}
if (!S_ISCHR(sb.st_mode)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("USB source %s was not a character device"),
src);
goto cleanup;
}
if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs + 1) < 0)
goto cleanup;
if (virUSBDeviceFileIterate(usb,
virLXCSetupHostUSBDeviceCgroup,
priv->cgroup) < 0)
goto cleanup;
if (lxcDomainAttachDeviceMknod(driver,
0700 | S_IFCHR,
sb.st_rdev,
vm,
dev,
src) < 0) {
if (virUSBDeviceFileIterate(usb,
virLXCTeardownHostUSBDeviceCgroup,
priv->cgroup) < 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
src, vm->def->name, virGetLastErrorMessage());
goto cleanup;
}
vm->def->hostdevs[vm->def->nhostdevs++] = def;
ret = 0;
cleanup:
virDomainAuditHostdev(vm, def, "attach", ret == 0);
virUSBDeviceFree(usb);
VIR_FREE(src);
return ret;
}
static int
lxcDomainAttachDeviceHostdevStorageLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainHostdevDefPtr def = dev->data.hostdev;
int ret = -1;
struct stat sb;
if (!def->source.caps.u.storage.block) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Missing storage block path"));
goto cleanup;
}
if (virDomainHostdevFind(vm->def, def, NULL) >= 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("host device already exists"));
return -1;
}
if (stat(def->source.caps.u.storage.block, &sb) < 0) {
virReportSystemError(errno,
_("Unable to access %s"),
def->source.caps.u.storage.block);
goto cleanup;
}
if (!S_ISBLK(sb.st_mode)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Hostdev source %s must be a block device"),
def->source.caps.u.storage.block);
goto cleanup;
}
if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs+1) < 0)
goto cleanup;
if (virCgroupAllowDevice(priv->cgroup,
'b',
major(sb.st_rdev),
minor(sb.st_rdev),
VIR_CGROUP_DEVICE_RWM) < 0)
goto cleanup;
if (lxcDomainAttachDeviceMknod(driver,
0700 | S_IFBLK,
sb.st_rdev,
vm,
dev,
def->source.caps.u.storage.block) < 0) {
if (virCgroupDenyDevice(priv->cgroup,
'b',
major(sb.st_rdev),
minor(sb.st_rdev),
VIR_CGROUP_DEVICE_RWM) < 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
def->source.caps.u.storage.block, vm->def->name, virGetLastErrorMessage());
goto cleanup;
}
vm->def->hostdevs[vm->def->nhostdevs++] = def;
ret = 0;
cleanup:
virDomainAuditHostdev(vm, def, "attach", ret == 0);
return ret;
}
static int
lxcDomainAttachDeviceHostdevMiscLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainHostdevDefPtr def = dev->data.hostdev;
int ret = -1;
struct stat sb;
if (!def->source.caps.u.misc.chardev) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Missing storage block path"));
goto cleanup;
}
if (virDomainHostdevFind(vm->def, def, NULL) >= 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("host device already exists"));
return -1;
}
if (stat(def->source.caps.u.misc.chardev, &sb) < 0) {
virReportSystemError(errno,
_("Unable to access %s"),
def->source.caps.u.misc.chardev);
goto cleanup;
}
if (!S_ISCHR(sb.st_mode)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Hostdev source %s must be a block device"),
def->source.caps.u.misc.chardev);
goto cleanup;
}
if (virCgroupAllowDevice(priv->cgroup,
'c',
major(sb.st_rdev),
minor(sb.st_rdev),
VIR_CGROUP_DEVICE_RWM) < 0)
goto cleanup;
if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs+1) < 0)
goto cleanup;
if (lxcDomainAttachDeviceMknod(driver,
0700 | S_IFBLK,
sb.st_rdev,
vm,
dev,
def->source.caps.u.misc.chardev) < 0) {
if (virCgroupDenyDevice(priv->cgroup,
'c',
major(sb.st_rdev),
minor(sb.st_rdev),
VIR_CGROUP_DEVICE_RWM) < 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
def->source.caps.u.storage.block, vm->def->name, virGetLastErrorMessage());
goto cleanup;
}
vm->def->hostdevs[vm->def->nhostdevs++] = def;
ret = 0;
cleanup:
virDomainAuditHostdev(vm, def, "attach", ret == 0);
return ret;
}
static int
lxcDomainAttachDeviceHostdevSubsysLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
switch (dev->data.hostdev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
return lxcDomainAttachDeviceHostdevSubsysUSBLive(driver, vm, dev);
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unsupported host device type %s"),
virDomainHostdevSubsysTypeToString(dev->data.hostdev->source.subsys.type));
return -1;
}
}
static int
lxcDomainAttachDeviceHostdevCapsLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
switch (dev->data.hostdev->source.caps.type) {
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_STORAGE:
return lxcDomainAttachDeviceHostdevStorageLive(driver, vm, dev);
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_MISC:
return lxcDomainAttachDeviceHostdevMiscLive(driver, vm, dev);
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unsupported host device type %s"),
virDomainHostdevCapsTypeToString(dev->data.hostdev->source.caps.type));
return -1;
}
}
static int
lxcDomainAttachDeviceHostdevLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach hostdev until init PID is known"));
return -1;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICES)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("devices cgroup isn't mounted"));
return -1;
}
switch (dev->data.hostdev->mode) {
case VIR_DOMAIN_HOSTDEV_MODE_SUBSYS:
return lxcDomainAttachDeviceHostdevSubsysLive(driver, vm, dev);
case VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES:
return lxcDomainAttachDeviceHostdevCapsLive(driver, vm, dev);
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unsupported host device mode %s"),
virDomainHostdevModeTypeToString(dev->data.hostdev->mode));
return -1;
}
}
static int
lxcDomainAttachDeviceLive(virConnectPtr conn,
virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
int ret = -1;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
ret = lxcDomainAttachDeviceDiskLive(driver, vm, dev);
if (!ret)
dev->data.disk = NULL;
break;
case VIR_DOMAIN_DEVICE_NET:
ret = lxcDomainAttachDeviceNetLive(conn, vm,
dev->data.net);
if (!ret)
dev->data.net = NULL;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
ret = lxcDomainAttachDeviceHostdevLive(driver, vm, dev);
if (!ret)
dev->data.hostdev = NULL;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be attached"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int
lxcDomainDetachDeviceDiskLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainDiskDefPtr def = NULL;
int idx, ret = -1;
char *dst = NULL;
const char *src;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach disk until init PID is known"));
goto cleanup;
}
if ((idx = virDomainDiskIndexByName(vm->def,
dev->data.disk->dst,
false)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("disk %s not found"), dev->data.disk->dst);
goto cleanup;
}
def = vm->def->disks[idx];
src = virDomainDiskGetSource(def);
if (virAsprintf(&dst, "/dev/%s", def->dst) < 0)
goto cleanup;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICES)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("devices cgroup isn't mounted"));
goto cleanup;
}
if (lxcDomainAttachDeviceUnlink(vm, dst) < 0) {
virDomainAuditDisk(vm, def->src, NULL, "detach", false);
goto cleanup;
}
virDomainAuditDisk(vm, def->src, NULL, "detach", true);
if (virCgroupDenyDevicePath(priv->cgroup, src,
VIR_CGROUP_DEVICE_RWM, false) != 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
src, vm->def->name, virGetLastErrorMessage());
virDomainDiskRemove(vm->def, idx);
virDomainDiskDefFree(def);
ret = 0;
cleanup:
VIR_FREE(dst);
return ret;
}
static int
lxcDomainDetachDeviceNetLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
int detachidx, ret = -1;
virDomainNetType actualType;
virDomainNetDefPtr detach = NULL;
virNetDevVPortProfilePtr vport = NULL;
virErrorPtr save_err = NULL;
if ((detachidx = virDomainNetFindIdx(vm->def, dev->data.net)) < 0)
goto cleanup;
detach = vm->def->nets[detachidx];
actualType = virDomainNetGetActualType(detach);
/* clear network bandwidth */
if (virDomainNetGetActualBandwidth(detach) &&
virNetDevSupportBandwidth(actualType) &&
virNetDevBandwidthClear(detach->ifname))
goto cleanup;
switch (actualType) {
case VIR_DOMAIN_NET_TYPE_BRIDGE:
case VIR_DOMAIN_NET_TYPE_NETWORK:
case VIR_DOMAIN_NET_TYPE_ETHERNET:
if (virNetDevVethDelete(detach->ifname) < 0) {
virDomainAuditNet(vm, detach, NULL, "detach", false);
goto cleanup;
}
break;
/* It'd be nice to support this, but with macvlan
* once assigned to a container nothing exists on
* the host side. Further the container can change
* the mac address of NIC name, so we can't easily
* find out which guest NIC it maps to
*/
case VIR_DOMAIN_NET_TYPE_DIRECT:
case VIR_DOMAIN_NET_TYPE_USER:
case VIR_DOMAIN_NET_TYPE_VHOSTUSER:
case VIR_DOMAIN_NET_TYPE_SERVER:
case VIR_DOMAIN_NET_TYPE_CLIENT:
case VIR_DOMAIN_NET_TYPE_MCAST:
case VIR_DOMAIN_NET_TYPE_INTERNAL:
case VIR_DOMAIN_NET_TYPE_HOSTDEV:
case VIR_DOMAIN_NET_TYPE_UDP:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Only bridged veth devices can be detached"));
goto cleanup;
case VIR_DOMAIN_NET_TYPE_LAST:
default:
virReportEnumRangeError(virDomainNetType, actualType);
goto cleanup;
}
virDomainAuditNet(vm, detach, NULL, "detach", true);
virDomainConfNWFilterTeardown(detach);
vport = virDomainNetGetActualVirtPortProfile(detach);
if (vport && vport->virtPortType == VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH)
ignore_value(virNetDevOpenvswitchRemovePort(
virDomainNetGetActualBridgeName(detach),
detach->ifname));
ret = 0;
cleanup:
if (!ret) {
virErrorPreserveLast(&save_err);
if (detach->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
virConnectPtr conn = virGetConnectNetwork();
if (conn) {
virDomainNetReleaseActualDevice(conn, vm->def, detach);
virObjectUnref(conn);
} else {
VIR_WARN("Unable to release network device '%s'", NULLSTR(detach->ifname));
}
}
virDomainNetRemove(vm->def, detachidx);
virDomainNetDefFree(detach);
virErrorRestore(&save_err);
}
return ret;
}
static int
lxcDomainDetachDeviceHostdevUSBLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainHostdevDefPtr def = NULL;
int idx, ret = -1;
char *dst = NULL;
virUSBDevicePtr usb = NULL;
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
virDomainHostdevSubsysUSBPtr usbsrc;
if ((idx = virDomainHostdevFind(vm->def,
dev->data.hostdev,
&def)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("usb device not found"));
goto cleanup;
}
usbsrc = &def->source.subsys.u.usb;
if (virAsprintf(&dst, "/dev/bus/usb/%03d/%03d",
usbsrc->bus, usbsrc->device) < 0)
goto cleanup;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICES)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("devices cgroup isn't mounted"));
goto cleanup;
}
if (!(usb = virUSBDeviceNew(usbsrc->bus, usbsrc->device, NULL)))
goto cleanup;
if (lxcDomainAttachDeviceUnlink(vm, dst) < 0) {
virDomainAuditHostdev(vm, def, "detach", false);
goto cleanup;
}
virDomainAuditHostdev(vm, def, "detach", true);
if (virUSBDeviceFileIterate(usb,
virLXCTeardownHostUSBDeviceCgroup,
priv->cgroup) < 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
dst, vm->def->name, virGetLastErrorMessage());
virObjectLock(hostdev_mgr->activeUSBHostdevs);
virUSBDeviceListDel(hostdev_mgr->activeUSBHostdevs, usb);
virObjectUnlock(hostdev_mgr->activeUSBHostdevs);
virDomainHostdevRemove(vm->def, idx);
virDomainHostdevDefFree(def);
ret = 0;
cleanup:
virUSBDeviceFree(usb);
VIR_FREE(dst);
return ret;
}
static int
lxcDomainDetachDeviceHostdevStorageLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainHostdevDefPtr def = NULL;
int idx, ret = -1;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach disk until init PID is known"));
goto cleanup;
}
if ((idx = virDomainHostdevFind(vm->def,
dev->data.hostdev,
&def)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("hostdev %s not found"),
dev->data.hostdev->source.caps.u.storage.block);
goto cleanup;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICES)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("devices cgroup isn't mounted"));
goto cleanup;
}
if (lxcDomainAttachDeviceUnlink(vm, def->source.caps.u.storage.block) < 0) {
virDomainAuditHostdev(vm, def, "detach", false);
goto cleanup;
}
virDomainAuditHostdev(vm, def, "detach", true);
if (virCgroupDenyDevicePath(priv->cgroup, def->source.caps.u.storage.block,
VIR_CGROUP_DEVICE_RWM, false) != 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
def->source.caps.u.storage.block, vm->def->name, virGetLastErrorMessage());
virDomainHostdevRemove(vm->def, idx);
virDomainHostdevDefFree(def);
ret = 0;
cleanup:
return ret;
}
static int
lxcDomainDetachDeviceHostdevMiscLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
virDomainHostdevDefPtr def = NULL;
int idx, ret = -1;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach disk until init PID is known"));
goto cleanup;
}
if ((idx = virDomainHostdevFind(vm->def,
dev->data.hostdev,
&def)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("hostdev %s not found"),
dev->data.hostdev->source.caps.u.misc.chardev);
goto cleanup;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_DEVICES)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("devices cgroup isn't mounted"));
goto cleanup;
}
if (lxcDomainAttachDeviceUnlink(vm, def->source.caps.u.misc.chardev) < 0) {
virDomainAuditHostdev(vm, def, "detach", false);
goto cleanup;
}
virDomainAuditHostdev(vm, def, "detach", true);
if (virCgroupDenyDevicePath(priv->cgroup, def->source.caps.u.misc.chardev,
VIR_CGROUP_DEVICE_RWM, false) != 0)
VIR_WARN("cannot deny device %s for domain %s: %s",
def->source.caps.u.misc.chardev, vm->def->name, virGetLastErrorMessage());
virDomainHostdevRemove(vm->def, idx);
virDomainHostdevDefFree(def);
ret = 0;
cleanup:
return ret;
}
static int
lxcDomainDetachDeviceHostdevSubsysLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
switch (dev->data.hostdev->source.subsys.type) {
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
return lxcDomainDetachDeviceHostdevUSBLive(driver, vm, dev);
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unsupported host device type %s"),
virDomainHostdevSubsysTypeToString(dev->data.hostdev->source.subsys.type));
return -1;
}
}
static int
lxcDomainDetachDeviceHostdevCapsLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
switch (dev->data.hostdev->source.caps.type) {
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_STORAGE:
return lxcDomainDetachDeviceHostdevStorageLive(vm, dev);
case VIR_DOMAIN_HOSTDEV_CAPS_TYPE_MISC:
return lxcDomainDetachDeviceHostdevMiscLive(vm, dev);
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unsupported host device type %s"),
virDomainHostdevCapsTypeToString(dev->data.hostdev->source.caps.type));
return -1;
}
}
static int
lxcDomainDetachDeviceHostdevLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virLXCDomainObjPrivatePtr priv = vm->privateData;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Cannot attach hostdev until init PID is known"));
return -1;
}
switch (dev->data.hostdev->mode) {
case VIR_DOMAIN_HOSTDEV_MODE_SUBSYS:
return lxcDomainDetachDeviceHostdevSubsysLive(driver, vm, dev);
case VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES:
return lxcDomainDetachDeviceHostdevCapsLive(vm, dev);
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unsupported host device mode %s"),
virDomainHostdevModeTypeToString(dev->data.hostdev->mode));
return -1;
}
}
static int
lxcDomainDetachDeviceLive(virLXCDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
int ret = -1;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
ret = lxcDomainDetachDeviceDiskLive(vm, dev);
break;
case VIR_DOMAIN_DEVICE_NET:
ret = lxcDomainDetachDeviceNetLive(vm, dev);
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
ret = lxcDomainDetachDeviceHostdevLive(driver, vm, dev);
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be detached"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int lxcDomainAttachDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virCapsPtr caps = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr vmdef = NULL;
virDomainDeviceDefPtr dev = NULL, dev_copy = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainAttachDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto endjob;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE);
if (dev == NULL)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
flags & VIR_DOMAIN_AFFECT_LIVE) {
/* If we are affecting both CONFIG and LIVE
* create a deep copy of device as adding
* to CONFIG takes one instance.
*/
dev_copy = virDomainDeviceDefCopy(dev, vm->def,
caps, driver->xmlopt, NULL);
if (!dev_copy)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt, NULL);
if (!vmdef)
goto endjob;
if (virDomainDefCompatibleDevice(vmdef, dev, NULL,
VIR_DOMAIN_DEVICE_ACTION_ATTACH,
false) < 0)
goto endjob;
if ((ret = lxcDomainAttachDeviceConfig(vmdef, dev)) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy, NULL,
VIR_DOMAIN_DEVICE_ACTION_ATTACH,
true) < 0)
goto endjob;
if ((ret = lxcDomainAttachDeviceLive(dom->conn, driver, vm, dev_copy)) < 0)
goto endjob;
/*
* update domain status forcibly because the domain status may be
* changed even if we failed to attach the device. For example,
* a new controller may be created.
*/
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
ret = -1;
goto endjob;
}
}
/* Finally, if no error until here, we can save config. */
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
ret = virDomainSaveConfig(cfg->configDir, driver->caps, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int lxcDomainAttachDevice(virDomainPtr dom,
const char *xml)
{
return lxcDomainAttachDeviceFlags(dom, xml,
VIR_DOMAIN_AFFECT_LIVE);
}
static int lxcDomainUpdateDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virCapsPtr caps = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr vmdef = NULL;
virDomainDeviceDefPtr dev = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainUpdateDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Unable to modify live devices"));
goto endjob;
}
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto endjob;
if (!(dev = virDomainDeviceDefParse(xml, vm->def, caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE)))
goto endjob;
/* Make a copy for updated domain. */
if (!(vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt, NULL)))
goto endjob;
/* virDomainDefCompatibleDevice call is delayed until we know the
* device we're going to update. */
if (lxcDomainUpdateDeviceConfig(vmdef, dev) < 0)
goto endjob;
if (virDomainSaveConfig(cfg->configDir, driver->caps, vmdef) < 0)
goto endjob;
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
ret = 0;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(vmdef);
virDomainDeviceDefFree(dev);
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int lxcDomainDetachDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virCapsPtr caps = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr vmdef = NULL;
virDomainDeviceDefPtr dev = NULL, dev_copy = NULL;
int ret = -1;
virLXCDriverConfigPtr cfg = virLXCDriverGetConfig(driver);
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
if (virDomainDetachDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto endjob;
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE);
if (dev == NULL)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
flags & VIR_DOMAIN_AFFECT_LIVE) {
/* If we are affecting both CONFIG and LIVE
* create a deep copy of device as adding
* to CONFIG takes one instance.
*/
dev_copy = virDomainDeviceDefCopy(dev, vm->def,
caps, driver->xmlopt, NULL);
if (!dev_copy)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt, NULL);
if (!vmdef)
goto endjob;
if ((ret = lxcDomainDetachDeviceConfig(vmdef, dev)) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if ((ret = lxcDomainDetachDeviceLive(driver, vm, dev_copy)) < 0)
goto endjob;
/*
* update domain status forcibly because the domain status may be
* changed even if we failed to attach the device. For example,
* a new controller may be created.
*/
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
ret = -1;
goto endjob;
}
}
/* Finally, if no error until here, we can save config. */
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
ret = virDomainSaveConfig(cfg->configDir, driver->caps, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int lxcDomainDetachDevice(virDomainPtr dom,
const char *xml)
{
return lxcDomainDetachDeviceFlags(dom, xml,
VIR_DOMAIN_AFFECT_LIVE);
}
static int lxcDomainLxcOpenNamespace(virDomainPtr dom,
int **fdlist,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virLXCDomainObjPrivatePtr priv;
int ret = -1;
size_t nfds = 0;
*fdlist = NULL;
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainLxcOpenNamespaceEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (!priv->initpid) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Init pid is not yet available"));
goto endjob;
}
if (virProcessGetNamespaces(priv->initpid, &nfds, fdlist) < 0)
goto endjob;
ret = nfds;
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static char *
lxcConnectGetSysinfo(virConnectPtr conn, unsigned int flags)
{
virLXCDriverPtr driver = conn->privateData;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virCheckFlags(0, NULL);
if (virConnectGetSysinfoEnsureACL(conn) < 0)
return NULL;
if (!driver->hostsysinfo) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Host SMBIOS information is not available"));
return NULL;
}
if (virSysinfoFormat(&buf, driver->hostsysinfo) < 0)
return NULL;
if (virBufferCheckError(&buf) < 0)
return NULL;
return virBufferContentAndReset(&buf);
}
static int
lxcNodeGetInfo(virConnectPtr conn,
virNodeInfoPtr nodeinfo)
{
if (virNodeGetInfoEnsureACL(conn) < 0)
return -1;
return virCapabilitiesGetNodeInfo(nodeinfo);
}
static int
lxcDomainMemoryStats(virDomainPtr dom,
virDomainMemoryStatPtr stats,
unsigned int nr_stats,
unsigned int flags)
{
virDomainObjPtr vm;
int ret = -1;
virLXCDomainObjPrivatePtr priv;
unsigned long long swap_usage;
unsigned long mem_usage;
virLXCDriverPtr driver = dom->conn->privateData;
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainMemoryStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto endjob;
if (virCgroupGetMemSwapUsage(priv->cgroup, &swap_usage) < 0)
goto endjob;
if (virCgroupGetMemoryUsage(priv->cgroup, &mem_usage) < 0)
goto endjob;
ret = 0;
if (ret < nr_stats) {
stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON;
stats[ret].val = vm->def->mem.cur_balloon;
ret++;
}
if (ret < nr_stats) {
stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_SWAP_IN;
stats[ret].val = swap_usage;
ret++;
}
if (ret < nr_stats) {
stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_RSS;
stats[ret].val = mem_usage;
ret++;
}
endjob:
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcNodeGetCPUStats(virConnectPtr conn,
int cpuNum,
virNodeCPUStatsPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetCPUStatsEnsureACL(conn) < 0)
return -1;
return virHostCPUGetStats(cpuNum, params, nparams, flags);
}
static int
lxcNodeGetMemoryStats(virConnectPtr conn,
int cellNum,
virNodeMemoryStatsPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetMemoryStatsEnsureACL(conn) < 0)
return -1;
return virHostMemGetStats(cellNum, params, nparams, flags);
}
static int
lxcNodeGetCellsFreeMemory(virConnectPtr conn,
unsigned long long *freeMems,
int startCell,
int maxCells)
{
if (virNodeGetCellsFreeMemoryEnsureACL(conn) < 0)
return -1;
return virHostMemGetCellsFree(freeMems, startCell, maxCells);
}
static unsigned long long
lxcNodeGetFreeMemory(virConnectPtr conn)
{
unsigned long long freeMem;
if (virNodeGetFreeMemoryEnsureACL(conn) < 0)
return 0;
if (virHostMemGetInfo(NULL, &freeMem) < 0)
return 0;
return freeMem;
}
static int
lxcNodeGetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetMemoryParametersEnsureACL(conn) < 0)
return -1;
return virHostMemGetParameters(params, nparams, flags);
}
static int
lxcNodeSetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
if (virNodeSetMemoryParametersEnsureACL(conn) < 0)
return -1;
return virHostMemSetParameters(params, nparams, flags);
}
static int
lxcNodeGetCPUMap(virConnectPtr conn,
unsigned char **cpumap,
unsigned int *online,
unsigned int flags)
{
if (virNodeGetCPUMapEnsureACL(conn) < 0)
return -1;
return virHostCPUGetMap(cpumap, online, flags);
}
static int
lxcNodeSuspendForDuration(virConnectPtr conn,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
if (virNodeSuspendForDurationEnsureACL(conn) < 0)
return -1;
return virNodeSuspend(target, duration, flags);
}
static int
lxcDomainSetMetadata(virDomainPtr dom,
int type,
const char *metadata,
const char *key,
const char *uri,
unsigned int flags)
{
virLXCDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virLXCDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
return -1;
cfg = virLXCDriverGetConfig(driver);
if (virDomainSetMetadataEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!(caps = virLXCDriverGetCapabilities(driver, false)))
goto cleanup;
if (virLXCDomainObjBeginJob(driver, vm, LXC_JOB_MODIFY) < 0)
goto cleanup;
ret = virDomainObjSetMetadata(vm, type, metadata, key, uri, caps,
driver->xmlopt, cfg->stateDir,
cfg->configDir, flags);
if (ret == 0) {
virObjectEventPtr ev = NULL;
ev = virDomainEventMetadataChangeNewFromObj(vm, type, uri);
virObjectEventStateQueue(driver->domainEventState, ev);
}
virLXCDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static char *
lxcDomainGetMetadata(virDomainPtr dom,
int type,
const char *uri,
unsigned int flags)
{
virDomainObjPtr vm;
char *ret = NULL;
if (!(vm = lxcDomObjFromDomain(dom)))
return NULL;
if (virDomainGetMetadataEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = virDomainObjGetMetadata(vm, type, uri, flags);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcDomainGetCPUStats(virDomainPtr dom,
virTypedParameterPtr params,
unsigned int nparams,
int start_cpu,
unsigned int ncpus,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
virLXCDomainObjPrivatePtr priv;
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
return ret;
priv = vm->privateData;
if (virDomainGetCPUStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virDomainObjCheckActive(vm) < 0)
goto cleanup;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUACCT)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPUACCT controller is not mounted"));
goto cleanup;
}
if (start_cpu == -1)
ret = virCgroupGetDomainTotalCpuStats(priv->cgroup,
params, nparams);
else
ret = virCgroupGetPercpuStats(priv->cgroup, params,
nparams, start_cpu, ncpus, NULL);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
lxcNodeGetFreePages(virConnectPtr conn,
unsigned int npages,
unsigned int *pages,
int startCell,
unsigned int cellCount,
unsigned long long *counts,
unsigned int flags)
{
virCheckFlags(0, -1);
if (virNodeGetFreePagesEnsureACL(conn) < 0)
return -1;
return virHostMemGetFreePages(npages, pages, startCell, cellCount, counts);
}
static int
lxcNodeAllocPages(virConnectPtr conn,
unsigned int npages,
unsigned int *pageSizes,
unsigned long long *pageCounts,
int startCell,
unsigned int cellCount,
unsigned int flags)
{
bool add = !(flags & VIR_NODE_ALLOC_PAGES_SET);
virCheckFlags(VIR_NODE_ALLOC_PAGES_SET, -1);
if (virNodeAllocPagesEnsureACL(conn) < 0)
return -1;
return virHostMemAllocPages(npages, pageSizes, pageCounts,
startCell, cellCount, add);
}
static int
lxcDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = lxcDomObjFromDomain(dom)))
return ret;
if (virDomainHasManagedSaveImageEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* Function Tables */
static virHypervisorDriver lxcHypervisorDriver = {
.name = LXC_DRIVER_NAME,
.connectURIProbe = lxcConnectURIProbe,
.connectOpen = lxcConnectOpen, /* 0.4.2 */
.connectClose = lxcConnectClose, /* 0.4.2 */
.connectSupportsFeature = lxcConnectSupportsFeature, /* 1.2.2 */
.connectGetVersion = lxcConnectGetVersion, /* 0.4.6 */
.connectGetHostname = lxcConnectGetHostname, /* 0.6.3 */
.connectGetSysinfo = lxcConnectGetSysinfo, /* 1.0.5 */
.nodeGetInfo = lxcNodeGetInfo, /* 0.6.5 */
.connectGetCapabilities = lxcConnectGetCapabilities, /* 0.6.5 */
.connectListDomains = lxcConnectListDomains, /* 0.4.2 */
.connectNumOfDomains = lxcConnectNumOfDomains, /* 0.4.2 */
.connectListAllDomains = lxcConnectListAllDomains, /* 0.9.13 */
.domainCreateXML = lxcDomainCreateXML, /* 0.4.4 */
.domainCreateXMLWithFiles = lxcDomainCreateXMLWithFiles, /* 1.1.1 */
.domainLookupByID = lxcDomainLookupByID, /* 0.4.2 */
.domainLookupByUUID = lxcDomainLookupByUUID, /* 0.4.2 */
.domainLookupByName = lxcDomainLookupByName, /* 0.4.2 */
.domainSuspend = lxcDomainSuspend, /* 0.7.2 */
.domainResume = lxcDomainResume, /* 0.7.2 */
.domainDestroy = lxcDomainDestroy, /* 0.4.4 */
.domainDestroyFlags = lxcDomainDestroyFlags, /* 0.9.4 */
.domainGetOSType = lxcDomainGetOSType, /* 0.4.2 */
.domainGetMaxMemory = lxcDomainGetMaxMemory, /* 0.7.2 */
.domainSetMaxMemory = lxcDomainSetMaxMemory, /* 0.7.2 */
.domainSetMemory = lxcDomainSetMemory, /* 0.7.2 */
.domainSetMemoryFlags = lxcDomainSetMemoryFlags, /* 1.2.7 */
.domainSetMemoryParameters = lxcDomainSetMemoryParameters, /* 0.8.5 */
.domainGetMemoryParameters = lxcDomainGetMemoryParameters, /* 0.8.5 */
.domainSetBlkioParameters = lxcDomainSetBlkioParameters, /* 0.9.8 */
.domainGetBlkioParameters = lxcDomainGetBlkioParameters, /* 0.9.8 */
.domainGetInfo = lxcDomainGetInfo, /* 0.4.2 */
.domainGetState = lxcDomainGetState, /* 0.9.2 */
.domainGetSecurityLabel = lxcDomainGetSecurityLabel, /* 0.9.10 */
.nodeGetSecurityModel = lxcNodeGetSecurityModel, /* 0.9.10 */
.domainGetXMLDesc = lxcDomainGetXMLDesc, /* 0.4.2 */
.connectDomainXMLFromNative = lxcConnectDomainXMLFromNative, /* 1.2.2 */
.connectListDefinedDomains = lxcConnectListDefinedDomains, /* 0.4.2 */
.connectNumOfDefinedDomains = lxcConnectNumOfDefinedDomains, /* 0.4.2 */
.domainCreate = lxcDomainCreate, /* 0.4.4 */
.domainCreateWithFlags = lxcDomainCreateWithFlags, /* 0.8.2 */
.domainCreateWithFiles = lxcDomainCreateWithFiles, /* 1.1.1 */
.domainDefineXML = lxcDomainDefineXML, /* 0.4.2 */
.domainDefineXMLFlags = lxcDomainDefineXMLFlags, /* 1.2.12 */
.domainUndefine = lxcDomainUndefine, /* 0.4.2 */
.domainUndefineFlags = lxcDomainUndefineFlags, /* 0.9.4 */
.domainAttachDevice = lxcDomainAttachDevice, /* 1.0.1 */
.domainAttachDeviceFlags = lxcDomainAttachDeviceFlags, /* 1.0.1 */
.domainDetachDevice = lxcDomainDetachDevice, /* 1.0.1 */
.domainDetachDeviceFlags = lxcDomainDetachDeviceFlags, /* 1.0.1 */
.domainUpdateDeviceFlags = lxcDomainUpdateDeviceFlags, /* 1.0.1 */
.domainGetAutostart = lxcDomainGetAutostart, /* 0.7.0 */
.domainSetAutostart = lxcDomainSetAutostart, /* 0.7.0 */
.domainGetSchedulerType = lxcDomainGetSchedulerType, /* 0.5.0 */
.domainGetSchedulerParameters = lxcDomainGetSchedulerParameters, /* 0.5.0 */
.domainGetSchedulerParametersFlags = lxcDomainGetSchedulerParametersFlags, /* 0.9.2 */
.domainSetSchedulerParameters = lxcDomainSetSchedulerParameters, /* 0.5.0 */
.domainSetSchedulerParametersFlags = lxcDomainSetSchedulerParametersFlags, /* 0.9.2 */
.domainBlockStats = lxcDomainBlockStats, /* 1.2.2 */
.domainBlockStatsFlags = lxcDomainBlockStatsFlags, /* 1.2.2 */
.domainInterfaceStats = lxcDomainInterfaceStats, /* 0.7.3 */
.domainMemoryStats = lxcDomainMemoryStats, /* 1.2.2 */
.nodeGetCPUStats = lxcNodeGetCPUStats, /* 0.9.3 */
.nodeGetMemoryStats = lxcNodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = lxcNodeGetCellsFreeMemory, /* 0.6.5 */
.nodeGetFreeMemory = lxcNodeGetFreeMemory, /* 0.6.5 */
.nodeGetCPUMap = lxcNodeGetCPUMap, /* 1.0.0 */
.connectDomainEventRegister = lxcConnectDomainEventRegister, /* 0.7.0 */
.connectDomainEventDeregister = lxcConnectDomainEventDeregister, /* 0.7.0 */
.connectIsEncrypted = lxcConnectIsEncrypted, /* 0.7.3 */
.connectIsSecure = lxcConnectIsSecure, /* 0.7.3 */
.domainIsActive = lxcDomainIsActive, /* 0.7.3 */
.domainIsPersistent = lxcDomainIsPersistent, /* 0.7.3 */
.domainIsUpdated = lxcDomainIsUpdated, /* 0.8.6 */
.connectDomainEventRegisterAny = lxcConnectDomainEventRegisterAny, /* 0.8.0 */
.connectDomainEventDeregisterAny = lxcConnectDomainEventDeregisterAny, /* 0.8.0 */
.domainOpenConsole = lxcDomainOpenConsole, /* 0.8.6 */
.connectIsAlive = lxcConnectIsAlive, /* 0.9.8 */
.nodeSuspendForDuration = lxcNodeSuspendForDuration, /* 0.9.8 */
.domainSetMetadata = lxcDomainSetMetadata, /* 1.1.3 */
.domainGetMetadata = lxcDomainGetMetadata, /* 1.1.3 */
.domainGetCPUStats = lxcDomainGetCPUStats, /* 1.2.2 */
.nodeGetMemoryParameters = lxcNodeGetMemoryParameters, /* 0.10.2 */
.nodeSetMemoryParameters = lxcNodeSetMemoryParameters, /* 0.10.2 */
.domainSendProcessSignal = lxcDomainSendProcessSignal, /* 1.0.1 */
.domainShutdown = lxcDomainShutdown, /* 1.0.1 */
.domainShutdownFlags = lxcDomainShutdownFlags, /* 1.0.1 */
.domainReboot = lxcDomainReboot, /* 1.0.1 */
.domainLxcOpenNamespace = lxcDomainLxcOpenNamespace, /* 1.0.2 */
.nodeGetFreePages = lxcNodeGetFreePages, /* 1.2.6 */
.nodeAllocPages = lxcNodeAllocPages, /* 1.2.9 */
.domainHasManagedSaveImage = lxcDomainHasManagedSaveImage, /* 1.2.13 */
};
static virConnectDriver lxcConnectDriver = {
.localOnly = true,
.uriSchemes = (const char *[]){ "lxc", NULL },
.hypervisorDriver = &lxcHypervisorDriver,
};
static virStateDriver lxcStateDriver = {
.name = LXC_DRIVER_NAME,
.stateInitialize = lxcStateInitialize,
.stateCleanup = lxcStateCleanup,
.stateReload = lxcStateReload,
};
int lxcRegister(void)
{
if (virRegisterConnectDriver(&lxcConnectDriver,
true) < 0)
return -1;
if (virRegisterStateDriver(&lxcStateDriver) < 0)
return -1;
return 0;
}
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