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libvirt/src/uml/uml_driver.c
Michal Privoznik 152896ca7d uml: s/virDomainObjListFindByID/virDomainObjListFindByUUID/ 
ListFindByID() still requires to step through items in the hash table
(in the worst case scenario through all of them), lock each one and
compare whether we've found what we're looking for. This is suboptimal
as locking a domain object means we need to wait for the current API
running over the object to finish.

Unfortunately, we can't drop the function completely because we have
this public API virDomainLookupByID which we can't drop.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2015-04-24 13:26:09 +02:00

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/*
* uml_driver.c: core driver methods for managing UML guests
*
* Copyright (C) 2006-2015 Red Hat, Inc.
* Copyright (C) 2006-2008 Daniel P. Berrange
*
* 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/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include <sys/types.h>
#include <sys/poll.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <paths.h>
#include <pwd.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <sys/inotify.h>
#include <sys/un.h>
#include "uml_driver.h"
#include "uml_conf.h"
#include "virbuffer.h"
#include "nodeinfo.h"
#include "virstats.h"
#include "capabilities.h"
#include "viralloc.h"
#include "viruuid.h"
#include "domain_conf.h"
#include "domain_audit.h"
#include "datatypes.h"
#include "virlog.h"
#include "domain_nwfilter.h"
#include "nwfilter_conf.h"
#include "virfile.h"
#include "fdstream.h"
#include "configmake.h"
#include "virnetdevtap.h"
#include "virnodesuspend.h"
#include "virprocess.h"
#include "viruri.h"
#include "virstring.h"
#include "viraccessapicheck.h"
#define VIR_FROM_THIS VIR_FROM_UML
VIR_LOG_INIT("uml.uml_driver");
typedef struct _umlDomainObjPrivate umlDomainObjPrivate;
typedef umlDomainObjPrivate *umlDomainObjPrivatePtr;
struct _umlDomainObjPrivate {
int monitor;
int monitorWatch;
};
static int umlProcessAutoDestroyInit(struct uml_driver *driver);
static void umlProcessAutoDestroyRun(struct uml_driver *driver,
virConnectPtr conn);
static void umlProcessAutoDestroyShutdown(struct uml_driver *driver);
static int umlProcessAutoDestroyAdd(struct uml_driver *driver,
virDomainObjPtr vm,
virConnectPtr conn);
static int umlProcessAutoDestroyRemove(struct uml_driver *driver,
virDomainObjPtr vm);
static int umlStateCleanup(void);
static void *umlDomainObjPrivateAlloc(void)
{
umlDomainObjPrivatePtr priv;
if (VIR_ALLOC(priv) < 0)
return NULL;
priv->monitor = -1;
priv->monitorWatch = -1;
return priv;
}
static void umlDomainObjPrivateFree(void *data)
{
umlDomainObjPrivatePtr priv = data;
VIR_FREE(priv);
}
static void umlDriverLock(struct uml_driver *driver)
{
virMutexLock(&driver->lock);
}
static void umlDriverUnlock(struct uml_driver *driver)
{
virMutexUnlock(&driver->lock);
}
static int umlOpenMonitor(struct uml_driver *driver,
virDomainObjPtr vm);
static int umlReadPidFile(struct uml_driver *driver,
virDomainObjPtr vm);
static void umlDomainEventQueue(struct uml_driver *driver,
virObjectEventPtr event);
static int umlStartVMDaemon(virConnectPtr conn,
struct uml_driver *driver,
virDomainObjPtr vm,
bool autoDestroy);
static void umlShutdownVMDaemon(struct uml_driver *driver,
virDomainObjPtr vm,
virDomainShutoffReason reason);
static int umlMonitorCommand(const struct uml_driver *driver,
const virDomainObj *vm,
const char *cmd,
char **reply);
static struct uml_driver *uml_driver;
static int
umlVMFilterRebuild(virDomainObjListIterator iter, void *data)
{
return virDomainObjListForEach(uml_driver->domains, iter, data);
}
static void
umlVMDriverLock(void)
{
umlDriverLock(uml_driver);
}
static void
umlVMDriverUnlock(void)
{
umlDriverUnlock(uml_driver);
}
static virNWFilterCallbackDriver umlCallbackDriver = {
.name = "UML",
.vmFilterRebuild = umlVMFilterRebuild,
.vmDriverLock = umlVMDriverLock,
.vmDriverUnlock = umlVMDriverUnlock,
};
struct umlAutostartData {
struct uml_driver *driver;
virConnectPtr conn;
};
static int
umlAutostartDomain(virDomainObjPtr vm,
void *opaque)
{
const struct umlAutostartData *data = opaque;
int ret = 0;
virObjectLock(vm);
if (vm->autostart &&
!virDomainObjIsActive(vm)) {
virResetLastError();
ret = umlStartVMDaemon(data->conn, data->driver, vm, false);
virDomainAuditStart(vm, "booted", ret >= 0);
if (ret < 0) {
virErrorPtr err = virGetLastError();
VIR_ERROR(_("Failed to autostart VM '%s': %s"),
vm->def->name, err ? err->message : _("unknown error"));
} else {
virObjectEventPtr event =
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
if (event)
umlDomainEventQueue(data->driver, event);
}
}
virObjectUnlock(vm);
return ret;
}
static void
umlAutostartConfigs(struct uml_driver *driver)
{
/* XXX: Figure out a better way todo this. The domain
* startup code needs a connection handle in order
* to lookup the bridge associated with a virtual
* network
*/
virConnectPtr conn = virConnectOpen(driver->privileged ?
"uml:///system" :
"uml:///session");
/* Ignoring NULL conn which is mostly harmless here */
struct umlAutostartData data = { driver, conn };
umlDriverLock(driver);
virDomainObjListForEach(driver->domains, umlAutostartDomain, &data);
umlDriverUnlock(driver);
virObjectUnref(conn);
}
static int
umlIdentifyOneChrPTY(struct uml_driver *driver,
virDomainObjPtr dom,
virDomainChrDefPtr def,
const char *dev)
{
char *cmd;
char *res = NULL;
int retries = 0;
if (virAsprintf(&cmd, "config %s%d", dev, def->target.port) < 0)
return -1;
requery:
if (umlMonitorCommand(driver, dom, cmd, &res) < 0)
return -1;
if (res && STRPREFIX(res, "pts:")) {
VIR_FREE(def->source.data.file.path);
if (VIR_STRDUP(def->source.data.file.path, res + 4) < 0) {
VIR_FREE(res);
VIR_FREE(cmd);
return -1;
}
} else if (!res || STRPREFIX(res, "pts")) {
/* It can take a while to startup, so retry for
up to 5 seconds */
/* XXX should do this in a better non-blocking
way somehow ...perhaps register a timer */
if (retries++ < 50) {
VIR_FREE(res);
usleep(1000*10);
goto requery;
}
}
VIR_FREE(cmd);
VIR_FREE(res);
return 0;
}
static int
umlIdentifyChrPTY(struct uml_driver *driver,
virDomainObjPtr dom)
{
size_t i;
for (i = 0; i < dom->def->nconsoles; i++)
if (dom->def->consoles[i]->source.type == VIR_DOMAIN_CHR_TYPE_PTY)
if (umlIdentifyOneChrPTY(driver, dom,
dom->def->consoles[i], "con") < 0)
return -1;
for (i = 0; i < dom->def->nserials; i++)
if (dom->def->serials[i]->source.type == VIR_DOMAIN_CHR_TYPE_PTY &&
umlIdentifyOneChrPTY(driver, dom,
dom->def->serials[i], "ssl") < 0)
return -1;
return 0;
}
static void
umlInotifyEvent(int watch,
int fd,
int events ATTRIBUTE_UNUSED,
void *data)
{
char buf[1024];
struct inotify_event e;
int got;
char *tmp, *name;
struct uml_driver *driver = data;
virDomainObjPtr dom;
virObjectEventPtr event = NULL;
umlDriverLock(driver);
if (watch != driver->inotifyWatch)
goto cleanup;
reread:
got = read(fd, buf, sizeof(buf));
if (got == -1) {
if (errno == EINTR)
goto reread;
goto cleanup;
}
tmp = buf;
while (got) {
if (got < sizeof(e))
goto cleanup; /* bad */
memcpy(&e, tmp, sizeof(e));
tmp += sizeof(e);
got -= sizeof(e);
if (got < e.len)
goto cleanup;
tmp += e.len;
got -= e.len;
name = (char *)&(e.name);
dom = virDomainObjListFindByName(driver->domains, name);
if (!dom)
continue;
if (e.mask & IN_DELETE) {
VIR_DEBUG("Got inotify domain shutdown '%s'", name);
if (!virDomainObjIsActive(dom)) {
virDomainObjEndAPI(&dom);
continue;
}
umlShutdownVMDaemon(driver, dom, VIR_DOMAIN_SHUTOFF_SHUTDOWN);
virDomainAuditStop(dom, "shutdown");
event = virDomainEventLifecycleNewFromObj(dom,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
if (!dom->persistent)
virDomainObjListRemove(driver->domains, dom);
} else if (e.mask & (IN_CREATE | IN_MODIFY)) {
VIR_DEBUG("Got inotify domain startup '%s'", name);
if (virDomainObjIsActive(dom)) {
virDomainObjEndAPI(&dom);
continue;
}
if (umlReadPidFile(driver, dom) < 0) {
virDomainObjEndAPI(&dom);
continue;
}
dom->def->id = driver->nextvmid++;
if (!driver->nactive && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
driver->nactive++;
virDomainObjSetState(dom, VIR_DOMAIN_RUNNING,
VIR_DOMAIN_RUNNING_BOOTED);
if (umlOpenMonitor(driver, dom) < 0) {
VIR_WARN("Could not open monitor for new domain");
umlShutdownVMDaemon(driver, dom,
VIR_DOMAIN_SHUTOFF_FAILED);
virDomainAuditStop(dom, "failed");
event = virDomainEventLifecycleNewFromObj(dom,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FAILED);
if (!dom->persistent)
virDomainObjListRemove(driver->domains, dom);
} else if (umlIdentifyChrPTY(driver, dom) < 0) {
VIR_WARN("Could not identify character devices for new domain");
umlShutdownVMDaemon(driver, dom,
VIR_DOMAIN_SHUTOFF_FAILED);
virDomainAuditStop(dom, "failed");
event = virDomainEventLifecycleNewFromObj(dom,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FAILED);
if (!dom->persistent)
virDomainObjListRemove(driver->domains, dom);
}
}
virDomainObjEndAPI(&dom);
if (event) {
umlDomainEventQueue(driver, event);
event = NULL;
}
}
cleanup:
umlDriverUnlock(driver);
}
static int
umlDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
const virDomainDef *def ATTRIBUTE_UNUSED,
virCapsPtr caps ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
if (dev->type == VIR_DOMAIN_DEVICE_CHR &&
dev->data.chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
dev->data.chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE)
dev->data.chr->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_UML;
/* forbid capabilities mode hostdev in this kind of hypervisor */
if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV &&
dev->data.hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("hostdev mode 'capabilities' is not "
"supported in %s"),
virDomainVirtTypeToString(def->virtType));
return -1;
}
if (virDomainDeviceDefCheckUnsupportedMemoryDevice(dev) < 0)
return -1;
return 0;
}
static int
umlDomainDefPostParse(virDomainDefPtr def,
virCapsPtr caps ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
/* memory hotplug tunables are not supported by this driver */
if (virDomainDefCheckUnsupportedMemoryHotplug(def) < 0)
return -1;
return 0;
}
virDomainDefParserConfig umlDriverDomainDefParserConfig = {
.devicesPostParseCallback = umlDomainDeviceDefPostParse,
.domainPostParseCallback = umlDomainDefPostParse,
};
/**
* umlStartup:
*
* Initialization function for the Uml daemon
*/
static int
umlStateInitialize(bool privileged,
virStateInhibitCallback callback,
void *opaque)
{
char *base = NULL;
char *userdir = NULL;
virDomainXMLPrivateDataCallbacks privcb = {
.alloc = umlDomainObjPrivateAlloc,
.free = umlDomainObjPrivateFree,
};
if (VIR_ALLOC(uml_driver) < 0)
return -1;
uml_driver->privileged = privileged;
uml_driver->inhibitCallback = callback;
uml_driver->inhibitOpaque = opaque;
if (virMutexInit(&uml_driver->lock) < 0) {
VIR_FREE(uml_driver);
return -1;
}
umlDriverLock(uml_driver);
/* Don't have a dom0 so start from 1 */
uml_driver->nextvmid = 1;
uml_driver->inotifyWatch = -1;
if (!(uml_driver->domains = virDomainObjListNew()))
goto error;
uml_driver->domainEventState = virObjectEventStateNew();
if (!uml_driver->domainEventState)
goto error;
userdir = virGetUserDirectory();
if (!userdir)
goto error;
if (privileged) {
if (virAsprintf(&uml_driver->logDir,
"%s/log/libvirt/uml", LOCALSTATEDIR) == -1)
goto out_of_memory;
if (VIR_STRDUP(base, SYSCONFDIR "/libvirt") < 0)
goto error;
if (virAsprintf(&uml_driver->monitorDir,
"%s/run/libvirt/uml-guest", LOCALSTATEDIR) == -1)
goto out_of_memory;
} else {
base = virGetUserConfigDirectory();
if (!base)
goto error;
if (virAsprintf(&uml_driver->logDir,
"%s/uml/log", base) == -1)
goto out_of_memory;
if (virAsprintf(&uml_driver->monitorDir,
"%s/.uml", userdir) == -1)
goto out_of_memory;
}
/* Configuration paths are either $XDG_CONFIG_HOME/libvirt/uml/... (session) or
* /etc/libvirt/uml/... (system).
*/
if (virAsprintf(&uml_driver->configDir, "%s/uml", base) == -1)
goto out_of_memory;
if (virAsprintf(&uml_driver->autostartDir, "%s/uml/autostart", base) == -1)
goto out_of_memory;
VIR_FREE(base);
if ((uml_driver->caps = umlCapsInit()) == NULL)
goto out_of_memory;
if (!(uml_driver->xmlopt = virDomainXMLOptionNew(&umlDriverDomainDefParserConfig,
&privcb, NULL)))
goto error;
if ((uml_driver->inotifyFD = inotify_init()) < 0) {
VIR_ERROR(_("cannot initialize inotify"));
goto error;
}
if (virFileMakePath(uml_driver->monitorDir) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create monitor directory %s: %s"),
uml_driver->monitorDir,
virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
VIR_INFO("Adding inotify watch on %s", uml_driver->monitorDir);
if (inotify_add_watch(uml_driver->inotifyFD,
uml_driver->monitorDir,
IN_CREATE | IN_MODIFY | IN_DELETE) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create inotify watch on %s: %s"),
uml_driver->monitorDir,
virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
if ((uml_driver->inotifyWatch =
virEventAddHandle(uml_driver->inotifyFD, POLLIN,
umlInotifyEvent, uml_driver, NULL)) < 0)
goto error;
if (umlProcessAutoDestroyInit(uml_driver) < 0)
goto error;
if (virDomainObjListLoadAllConfigs(uml_driver->domains,
uml_driver->configDir,
uml_driver->autostartDir, 0,
uml_driver->caps,
uml_driver->xmlopt,
NULL, NULL) < 0)
goto error;
umlDriverUnlock(uml_driver);
VIR_FREE(userdir);
virNWFilterRegisterCallbackDriver(&umlCallbackDriver);
return 0;
out_of_memory:
VIR_ERROR(_("umlStartup: out of memory"));
error:
VIR_FREE(userdir);
VIR_FREE(base);
umlDriverUnlock(uml_driver);
umlStateCleanup();
return -1;
}
/**
* umlStateAutoStart:
*
* Function to autostart the Uml daemons
*/
static void
umlStateAutoStart(void)
{
if (!uml_driver)
return;
umlAutostartConfigs(uml_driver);
}
static void umlNotifyLoadDomain(virDomainObjPtr vm, int newVM, void *opaque)
{
struct uml_driver *driver = opaque;
if (newVM) {
virObjectEventPtr event =
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
VIR_DOMAIN_EVENT_DEFINED_ADDED);
if (event)
umlDomainEventQueue(driver, event);
}
}
/**
* umlStateReload:
*
* Function to restart the Uml daemon, it will recheck the configuration
* files and update its state and the networking
*/
static int
umlStateReload(void)
{
if (!uml_driver)
return 0;
umlDriverLock(uml_driver);
virDomainObjListLoadAllConfigs(uml_driver->domains,
uml_driver->configDir,
uml_driver->autostartDir, 0,
uml_driver->caps,
uml_driver->xmlopt,
umlNotifyLoadDomain, uml_driver);
umlDriverUnlock(uml_driver);
return 0;
}
static int
umlShutdownOneVM(virDomainObjPtr dom, void *opaque)
{
struct uml_driver *driver = opaque;
virObjectLock(dom);
if (virDomainObjIsActive(dom)) {
umlShutdownVMDaemon(driver, dom, VIR_DOMAIN_SHUTOFF_SHUTDOWN);
virDomainAuditStop(dom, "shutdown");
}
virObjectUnlock(dom);
return 0;
}
/**
* umlStateCleanup:
*
* Shutdown the Uml daemon, it will stop all active domains and networks
*/
static int
umlStateCleanup(void)
{
if (!uml_driver)
return -1;
umlDriverLock(uml_driver);
virNWFilterRegisterCallbackDriver(&umlCallbackDriver);
if (uml_driver->inotifyWatch != -1)
virEventRemoveHandle(uml_driver->inotifyWatch);
VIR_FORCE_CLOSE(uml_driver->inotifyFD);
virObjectUnref(uml_driver->caps);
virObjectUnref(uml_driver->xmlopt);
/* shutdown active VMs
* XXX allow them to stay around & reconnect */
virDomainObjListForEach(uml_driver->domains, umlShutdownOneVM, uml_driver);
virObjectUnref(uml_driver->domains);
virObjectEventStateFree(uml_driver->domainEventState);
VIR_FREE(uml_driver->logDir);
VIR_FREE(uml_driver->configDir);
VIR_FREE(uml_driver->autostartDir);
VIR_FREE(uml_driver->monitorDir);
umlProcessAutoDestroyShutdown(uml_driver);
umlDriverUnlock(uml_driver);
virMutexDestroy(&uml_driver->lock);
VIR_FREE(uml_driver);
return 0;
}
static int umlProcessAutoDestroyInit(struct uml_driver *driver)
{
if (!(driver->autodestroy = virHashCreate(5, NULL)))
return -1;
return 0;
}
struct umlProcessAutoDestroyData {
struct uml_driver *driver;
virConnectPtr conn;
};
static void umlProcessAutoDestroyDom(void *payload,
const void *name,
void *opaque)
{
struct umlProcessAutoDestroyData *data = opaque;
virConnectPtr conn = payload;
const char *uuidstr = name;
unsigned char uuid[VIR_UUID_BUFLEN];
virDomainObjPtr dom;
virObjectEventPtr event = NULL;
VIR_DEBUG("conn=%p uuidstr=%s thisconn=%p", conn, uuidstr, data->conn);
if (data->conn != conn)
return;
if (virUUIDParse(uuidstr, uuid) < 0) {
VIR_WARN("Failed to parse %s", uuidstr);
return;
}
if (!(dom = virDomainObjListFindByUUID(data->driver->domains,
uuid))) {
VIR_DEBUG("No domain object to kill");
return;
}
VIR_DEBUG("Killing domain");
umlShutdownVMDaemon(data->driver, dom, VIR_DOMAIN_SHUTOFF_DESTROYED);
virDomainAuditStop(dom, "destroyed");
event = virDomainEventLifecycleNewFromObj(dom,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
if (dom && !dom->persistent)
virDomainObjListRemove(data->driver->domains, dom);
if (dom)
virObjectUnlock(dom);
if (event)
umlDomainEventQueue(data->driver, event);
virHashRemoveEntry(data->driver->autodestroy, uuidstr);
}
/*
* Precondition: driver is locked
*/
static void umlProcessAutoDestroyRun(struct uml_driver *driver, virConnectPtr conn)
{
struct umlProcessAutoDestroyData data = {
driver, conn
};
VIR_DEBUG("conn=%p", conn);
virHashForEach(driver->autodestroy, umlProcessAutoDestroyDom, &data);
}
static void umlProcessAutoDestroyShutdown(struct uml_driver *driver)
{
virHashFree(driver->autodestroy);
}
static int umlProcessAutoDestroyAdd(struct uml_driver *driver,
virDomainObjPtr vm,
virConnectPtr conn)
{
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(vm->def->uuid, uuidstr);
VIR_DEBUG("vm=%s uuid=%s conn=%p", vm->def->name, uuidstr, conn);
if (virHashAddEntry(driver->autodestroy, uuidstr, conn) < 0)
return -1;
return 0;
}
static int umlProcessAutoDestroyRemove(struct uml_driver *driver,
virDomainObjPtr vm)
{
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(vm->def->uuid, uuidstr);
VIR_DEBUG("vm=%s uuid=%s", vm->def->name, uuidstr);
if (virHashRemoveEntry(driver->autodestroy, uuidstr) < 0)
return -1;
return 0;
}
static int umlReadPidFile(struct uml_driver *driver,
virDomainObjPtr vm)
{
int rc = -1;
FILE *file;
char *pidfile = NULL;
int retries = 0;
vm->pid = -1;
if (virAsprintf(&pidfile, "%s/%s/pid",
driver->monitorDir, vm->def->name) < 0)
return -1;
reopen:
if (!(file = fopen(pidfile, "r"))) {
if (errno == ENOENT &&
retries++ < 50) {
usleep(1000 * 100);
goto reopen;
}
goto cleanup;
}
if (fscanf(file, "%d", &vm->pid) != 1) {
errno = EINVAL;
VIR_FORCE_FCLOSE(file);
goto cleanup;
}
if (VIR_FCLOSE(file) < 0)
goto cleanup;
rc = 0;
cleanup:
if (rc != 0)
virReportSystemError(errno,
_("failed to read pid: %s"),
pidfile);
VIR_FREE(pidfile);
return rc;
}
static int umlMonitorAddress(const struct uml_driver *driver,
const virDomainObj *vm,
struct sockaddr_un *addr)
{
char *sockname;
int retval = 0;
if (virAsprintf(&sockname, "%s/%s/mconsole",
driver->monitorDir, vm->def->name) < 0)
return -1;
memset(addr, 0, sizeof(*addr));
addr->sun_family = AF_UNIX;
if (virStrcpyStatic(addr->sun_path, sockname) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unix path %s too long for destination"), sockname);
retval = -1;
}
VIR_FREE(sockname);
return retval;
}
static int umlOpenMonitor(struct uml_driver *driver,
virDomainObjPtr vm)
{
struct sockaddr_un addr;
struct stat sb;
int retries = 0;
umlDomainObjPrivatePtr priv = vm->privateData;
if (umlMonitorAddress(driver, vm, &addr) < 0)
return -1;
VIR_DEBUG("Dest address for monitor is '%s'", addr.sun_path);
restat:
if (stat(addr.sun_path, &sb) < 0) {
if (errno == ENOENT &&
retries++ < 50) {
usleep(1000 * 100);
goto restat;
}
return -1;
}
if ((priv->monitor = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
virReportSystemError(errno,
"%s", _("cannot open socket"));
return -1;
}
memset(addr.sun_path, 0, sizeof(addr.sun_path));
snprintf(addr.sun_path + 1, sizeof(addr.sun_path) - 1,
"libvirt-uml-%u", vm->pid);
VIR_DEBUG("Reply address for monitor is '%s'", addr.sun_path+1);
if (bind(priv->monitor, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
virReportSystemError(errno,
"%s", _("cannot bind socket"));
VIR_FORCE_CLOSE(priv->monitor);
return -1;
}
return 0;
}
#define MONITOR_MAGIC 0xcafebabe
#define MONITOR_BUFLEN 512
#define MONITOR_VERSION 2
struct monitor_request {
uint32_t magic;
uint32_t version;
uint32_t length;
char data[MONITOR_BUFLEN];
};
struct monitor_response {
uint32_t error;
uint32_t extra;
uint32_t length;
char data[MONITOR_BUFLEN];
};
static int umlMonitorCommand(const struct uml_driver *driver,
const virDomainObj *vm,
const char *cmd,
char **reply)
{
struct monitor_request req;
struct monitor_response res;
char *retdata = NULL;
int retlen = 0, ret = 0;
struct sockaddr_un addr;
unsigned int addrlen;
umlDomainObjPrivatePtr priv = vm->privateData;
VIR_DEBUG("Run command '%s'", cmd);
*reply = NULL;
if (umlMonitorAddress(driver, vm, &addr) < 0)
return -1;
memset(&req, 0, sizeof(req));
req.magic = MONITOR_MAGIC;
req.version = MONITOR_VERSION;
req.length = strlen(cmd);
if (req.length > (MONITOR_BUFLEN-1)) {
virReportSystemError(EINVAL,
_("cannot send too long command %s (%d bytes)"),
cmd, req.length);
return -1;
}
if (virStrcpyStatic(req.data, cmd) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Command %s too long for destination"), cmd);
return -1;
}
if (sendto(priv->monitor, &req, sizeof(req), 0,
(struct sockaddr *)&addr, sizeof(addr)) != sizeof(req)) {
virReportSystemError(errno,
_("cannot send command %s"),
cmd);
return -1;
}
do {
ssize_t nbytes;
addrlen = sizeof(addr);
nbytes = recvfrom(priv->monitor, &res, sizeof(res), 0,
(struct sockaddr *)&addr, &addrlen);
if (nbytes < 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
virReportSystemError(errno, _("cannot read reply %s"), cmd);
goto error;
}
/* Ensure res.length is safe to read before validating its value. */
if (nbytes < offsetof(struct monitor_request, data) ||
nbytes < offsetof(struct monitor_request, data) + res.length) {
virReportSystemError(0, _("incomplete reply %s"), cmd);
goto error;
}
if (VIR_REALLOC_N(retdata, retlen + res.length) < 0)
goto error;
memcpy(retdata + retlen, res.data, res.length);
retlen += res.length - 1;
retdata[retlen] = '\0';
if (res.error)
ret = -1;
} while (res.extra);
VIR_DEBUG("Command reply is '%s'", NULLSTR(retdata));
if (ret < 0)
VIR_FREE(retdata);
else
*reply = retdata;
return ret;
error:
VIR_FREE(retdata);
return -1;
}
static void umlCleanupTapDevices(virDomainObjPtr vm)
{
size_t i;
for (i = 0; i < vm->def->nnets; i++) {
virDomainNetDefPtr def = vm->def->nets[i];
if (def->type != VIR_DOMAIN_NET_TYPE_BRIDGE &&
def->type != VIR_DOMAIN_NET_TYPE_NETWORK)
continue;
ignore_value(virNetDevTapDelete(def->ifname,
def->backend.tap));
}
}
static int umlStartVMDaemon(virConnectPtr conn,
struct uml_driver *driver,
virDomainObjPtr vm,
bool autoDestroy)
{
int ret = -1;
char *logfile;
int logfd = -1;
umlDomainObjPrivatePtr priv = vm->privateData;
virCommandPtr cmd = NULL;
size_t i;
if (virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("VM is already active"));
return -1;
}
if (!vm->def->os.kernel) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("no kernel specified"));
return -1;
}
/* Make sure the binary we are about to try exec'ing exists.
* Technically we could catch the exec() failure, but that's
* in a sub-process so its hard to feed back a useful error
*/
if (!virFileIsExecutable(vm->def->os.kernel)) {
virReportSystemError(errno,
_("Cannot find UML kernel %s"),
vm->def->os.kernel);
return -1;
}
if (virFileMakePath(driver->logDir) < 0) {
virReportSystemError(errno,
_("cannot create log directory %s"),
driver->logDir);
return -1;
}
if (virAsprintf(&logfile, "%s/%s.log",
driver->logDir, vm->def->name) < 0)
return -1;
if ((logfd = open(logfile, O_CREAT | O_TRUNC | O_WRONLY,
S_IRUSR | S_IWUSR)) < 0) {
virReportSystemError(errno,
_("failed to create logfile %s"),
logfile);
VIR_FREE(logfile);
return -1;
}
VIR_FREE(logfile);
if (virSetCloseExec(logfd) < 0) {
virReportSystemError(errno, "%s",
_("Unable to set VM logfile close-on-exec flag"));
VIR_FORCE_CLOSE(logfd);
return -1;
}
/* Do this upfront, so any part of the startup process can add
* runtime state to vm->def that won't be persisted. This let's us
* report implicit runtime defaults in the XML, like vnc listen/socket
*/
VIR_DEBUG("Setting current domain def as transient");
if (virDomainObjSetDefTransient(driver->caps, driver->xmlopt,
vm, true) < 0) {
VIR_FORCE_CLOSE(logfd);
return -1;
}
if (!(cmd = umlBuildCommandLine(conn, driver, vm)))
goto cleanup;
for (i = 0; i < vm->def->nconsoles; i++) {
VIR_FREE(vm->def->consoles[i]->info.alias);
if (virAsprintf(&vm->def->consoles[i]->info.alias, "console%zu", i) < 0)
goto cleanup;
}
virCommandWriteArgLog(cmd, logfd);
priv->monitor = -1;
virCommandClearCaps(cmd);
virCommandSetOutputFD(cmd, &logfd);
virCommandSetErrorFD(cmd, &logfd);
virCommandDaemonize(cmd);
ret = virCommandRun(cmd, NULL);
if (ret < 0)
goto cleanup;
if (autoDestroy &&
(ret = umlProcessAutoDestroyAdd(driver, vm, conn)) < 0)
goto cleanup;
ret = virDomainObjSetDefTransient(driver->caps, driver->xmlopt, vm, false);
cleanup:
VIR_FORCE_CLOSE(logfd);
virCommandFree(cmd);
if (ret < 0) {
virDomainConfVMNWFilterTeardown(vm);
umlCleanupTapDevices(vm);
if (vm->newDef) {
virDomainDefFree(vm->def);
vm->def = vm->newDef;
vm->def->id = -1;
vm->newDef = NULL;
}
}
/* NB we don't mark it running here - we do that async
with inotify */
/* XXX what if someone else tries to start it again
before we get the inotification ? Sounds like
trouble.... */
/* XXX this is bad for events too. must fix this better */
return ret;
}
static void umlShutdownVMDaemon(struct uml_driver *driver,
virDomainObjPtr vm,
virDomainShutoffReason reason)
{
int ret;
umlDomainObjPrivatePtr priv = vm->privateData;
if (!virDomainObjIsActive(vm))
return;
virProcessKill(vm->pid, SIGTERM);
VIR_FORCE_CLOSE(priv->monitor);
if ((ret = waitpid(vm->pid, NULL, 0)) != vm->pid) {
VIR_WARN("Got unexpected pid %d != %d",
ret, vm->pid);
}
vm->pid = -1;
vm->def->id = -1;
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, reason);
virDomainConfVMNWFilterTeardown(vm);
umlCleanupTapDevices(vm);
/* Stop autodestroy in case guest is restarted */
umlProcessAutoDestroyRemove(driver, vm);
if (vm->newDef) {
virDomainDefFree(vm->def);
vm->def = vm->newDef;
vm->def->id = -1;
vm->newDef = NULL;
}
driver->nactive--;
if (!driver->nactive && driver->inhibitCallback)
driver->inhibitCallback(false, driver->inhibitOpaque);
}
static virDrvOpenStatus umlConnectOpen(virConnectPtr conn,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
unsigned int flags)
{
virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
if (conn->uri == NULL) {
if (uml_driver == NULL)
return VIR_DRV_OPEN_DECLINED;
if (!(conn->uri = virURIParse(uml_driver->privileged ?
"uml:///system" :
"uml:///session")))
return VIR_DRV_OPEN_ERROR;
} else {
if (conn->uri->scheme == NULL ||
STRNEQ(conn->uri->scheme, "uml"))
return VIR_DRV_OPEN_DECLINED;
/* Allow remote driver to deal with URIs with hostname server */
if (conn->uri->server != NULL)
return VIR_DRV_OPEN_DECLINED;
/* Check path and tell them correct path if they made a mistake */
if (uml_driver->privileged) {
if (STRNEQ(conn->uri->path, "/system") &&
STRNEQ(conn->uri->path, "/session")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected UML URI path '%s', try uml:///system"),
conn->uri->path);
return VIR_DRV_OPEN_ERROR;
}
} else {
if (STRNEQ(conn->uri->path, "/session")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected UML URI path '%s', try uml:///session"),
conn->uri->path);
return VIR_DRV_OPEN_ERROR;
}
}
/* URI was good, but driver isn't active */
if (uml_driver == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("uml state driver is not active"));
return VIR_DRV_OPEN_ERROR;
}
}
if (virConnectOpenEnsureACL(conn) < 0)
return VIR_DRV_OPEN_ERROR;
conn->privateData = uml_driver;
return VIR_DRV_OPEN_SUCCESS;
}
static int umlConnectClose(virConnectPtr conn)
{
struct uml_driver *driver = conn->privateData;
umlDriverLock(driver);
umlProcessAutoDestroyRun(driver, conn);
umlDriverUnlock(driver);
conn->privateData = NULL;
return 0;
}
static const char *umlConnectGetType(virConnectPtr conn) {
if (virConnectGetTypeEnsureACL(conn) < 0)
return NULL;
return "UML";
}
static int umlConnectIsSecure(virConnectPtr conn ATTRIBUTE_UNUSED)
{
/* Trivially secure, since always inside the daemon */
return 1;
}
static int umlConnectIsEncrypted(virConnectPtr conn ATTRIBUTE_UNUSED)
{
/* Not encrypted, but remote driver takes care of that */
return 0;
}
static int umlConnectIsAlive(virConnectPtr conn ATTRIBUTE_UNUSED)
{
return 1;
}
static char *umlConnectGetCapabilities(virConnectPtr conn) {
struct uml_driver *driver = (struct uml_driver *)conn->privateData;
char *xml;
if (virConnectGetCapabilitiesEnsureACL(conn) < 0)
return NULL;
umlDriverLock(driver);
xml = virCapabilitiesFormatXML(driver->caps);
umlDriverUnlock(driver);
return xml;
}
static int umlGetProcessInfo(unsigned long long *cpuTime, pid_t pid)
{
char *proc;
FILE *pidinfo;
unsigned long long usertime, systime;
if (virAsprintf(&proc, "/proc/%lld/stat", (long long) pid) < 0)
return -1;
if (!(pidinfo = fopen(proc, "r"))) {
/* VM probably shut down, so fake 0 */
*cpuTime = 0;
VIR_FREE(proc);
return 0;
}
VIR_FREE(proc);
if (fscanf(pidinfo, "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu", &usertime, &systime) != 2) {
umlDebug("not enough arg");
VIR_FORCE_FCLOSE(pidinfo);
return -1;
}
/* We got jiffies
* We want nanoseconds
* _SC_CLK_TCK is jiffies per second
* So calculate thus....
*/
*cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime) / (unsigned long long)sysconf(_SC_CLK_TCK);
umlDebug("Got %llu %llu %llu", usertime, systime, *cpuTime);
VIR_FORCE_FCLOSE(pidinfo);
return 0;
}
static virDomainPtr umlDomainLookupByID(virConnectPtr conn,
int id)
{
struct uml_driver *driver = (struct uml_driver *)conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
umlDriverLock(driver);
vm = virDomainObjListFindByID(driver->domains, id);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainLookupByIDEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
if (vm)
virObjectUnlock(vm);
return dom;
}
static virDomainPtr umlDomainLookupByUUID(virConnectPtr conn,
const unsigned char *uuid)
{
struct uml_driver *driver = (struct uml_driver *)conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainLookupByUUIDEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
if (vm)
virObjectUnlock(vm);
return dom;
}
static virDomainPtr umlDomainLookupByName(virConnectPtr conn,
const char *name)
{
struct uml_driver *driver = (struct uml_driver *)conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
umlDriverLock(driver);
vm = virDomainObjListFindByName(driver->domains, name);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainLookupByNameEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
virDomainObjEndAPI(&vm);
return dom;
}
static int umlDomainIsActive(virDomainPtr dom)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr obj;
int ret = -1;
umlDriverLock(driver);
obj = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!obj) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainIsActiveEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = virDomainObjIsActive(obj);
cleanup:
if (obj)
virObjectUnlock(obj);
return ret;
}
static int umlDomainIsPersistent(virDomainPtr dom)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr obj;
int ret = -1;
umlDriverLock(driver);
obj = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!obj) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainIsPersistentEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = obj->persistent;
cleanup:
if (obj)
virObjectUnlock(obj);
return ret;
}
static int umlDomainIsUpdated(virDomainPtr dom)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr obj;
int ret = -1;
umlDriverLock(driver);
obj = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!obj) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainIsUpdatedEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = obj->updated;
cleanup:
if (obj)
virObjectUnlock(obj);
return ret;
}
static int umlConnectGetVersion(virConnectPtr conn, unsigned long *version)
{
struct uml_driver *driver = conn->privateData;
struct utsname ut;
int ret = -1;
if (virConnectGetVersionEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
if (driver->umlVersion == 0) {
uname(&ut);
if (virParseVersionString(ut.release, &driver->umlVersion, true) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse version %s"), ut.release);
goto cleanup;
}
}
*version = driver->umlVersion;
ret = 0;
cleanup:
umlDriverUnlock(driver);
return ret;
}
static char *umlConnectGetHostname(virConnectPtr conn)
{
if (virConnectGetHostnameEnsureACL(conn) < 0)
return NULL;
return virGetHostname();
}
static int umlConnectListDomains(virConnectPtr conn, int *ids, int nids)
{
struct uml_driver *driver = conn->privateData;
int n;
if (virConnectListDomainsEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
n = virDomainObjListGetActiveIDs(driver->domains, ids, nids,
virConnectListDomainsCheckACL, conn);
umlDriverUnlock(driver);
return n;
}
static int umlConnectNumOfDomains(virConnectPtr conn)
{
struct uml_driver *driver = conn->privateData;
int n;
if (virConnectNumOfDomainsEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
n = virDomainObjListNumOfDomains(driver->domains, true,
virConnectNumOfDomainsCheckACL, conn);
umlDriverUnlock(driver);
return n;
}
static virDomainPtr umlDomainCreateXML(virConnectPtr conn, const char *xml,
unsigned int flags)
{
struct uml_driver *driver = conn->privateData;
virDomainDefPtr def;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virObjectEventPtr event = 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;
virNWFilterReadLockFilterUpdates();
umlDriverLock(driver);
if (!(def = virDomainDefParseString(xml, driver->caps, driver->xmlopt,
parse_flags)))
goto cleanup;
if (virDomainCreateXMLEnsureACL(conn, def) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
NULL)))
goto cleanup;
def = NULL;
if (umlStartVMDaemon(conn, driver, vm,
(flags & VIR_DOMAIN_START_AUTODESTROY)) < 0) {
virDomainAuditStart(vm, "booted", false);
virDomainObjListRemove(driver->domains,
vm);
vm = NULL;
goto cleanup;
}
virDomainAuditStart(vm, "booted", true);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
virDomainDefFree(def);
if (vm)
virObjectUnlock(vm);
if (event)
umlDomainEventQueue(driver, event);
umlDriverUnlock(driver);
virNWFilterUnlockFilterUpdates();
return dom;
}
static int umlDomainShutdownFlags(virDomainPtr dom,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *info = NULL;
int ret = -1;
virCheckFlags(0, -1);
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching id %d"), dom->id);
goto cleanup;
}
if (virDomainShutdownFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
#if 0
if (umlMonitorCommand(driver, vm, "system_powerdown", &info) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("shutdown operation failed"));
goto cleanup;
}
ret = 0;
#endif
cleanup:
VIR_FREE(info);
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
umlDomainShutdown(virDomainPtr dom)
{
return umlDomainShutdownFlags(dom, 0);
}
static int
umlDomainDestroyFlags(virDomainPtr dom,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
virCheckFlags(0, -1);
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching id %d"), dom->id);
goto cleanup;
}
if (virDomainDestroyFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
umlShutdownVMDaemon(driver, vm, VIR_DOMAIN_SHUTOFF_DESTROYED);
virDomainAuditStop(vm, "destroyed");
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
if (!vm->persistent) {
virDomainObjListRemove(driver->domains,
vm);
vm = NULL;
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
if (event)
umlDomainEventQueue(driver, event);
umlDriverUnlock(driver);
return ret;
}
static int umlDomainDestroy(virDomainPtr dom)
{
return umlDomainDestroyFlags(dom, 0);
}
static char *umlDomainGetOSType(virDomainPtr dom) {
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *type = NULL;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainGetOSTypeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (VIR_STRDUP(type, virDomainOSTypeToString(vm->def->os.type)) < 0)
goto cleanup;
cleanup:
if (vm)
virObjectUnlock(vm);
return type;
}
/* Returns max memory in kb, 0 if error */
static unsigned long long
umlDomainGetMaxMemory(virDomainPtr dom)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
unsigned long long ret = 0;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainGetMaxMemoryEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = virDomainDefGetMemoryActual(vm->def);
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int umlDomainSetMaxMemory(virDomainPtr dom, unsigned long newmax)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainSetMaxMemoryEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (newmax < vm->def->mem.cur_balloon) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("cannot set max memory lower than current memory"));
goto cleanup;
}
virDomainDefSetMemoryInitial(vm->def, newmax);
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int umlDomainSetMemory(virDomainPtr dom, unsigned long newmem)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainSetMemoryEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot set memory of an active domain"));
goto cleanup;
}
if (newmem > virDomainDefGetMemoryActual(vm->def)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("cannot set memory higher than max memory"));
goto cleanup;
}
vm->def->mem.cur_balloon = newmem;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int umlDomainGetInfo(virDomainPtr dom,
virDomainInfoPtr info)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainGetInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
info->state = virDomainObjGetState(vm, NULL);
if (!virDomainObjIsActive(vm)) {
info->cpuTime = 0;
} else {
if (umlGetProcessInfo(&(info->cpuTime), vm->pid) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot read cputime for domain"));
goto cleanup;
}
}
info->maxMem = virDomainDefGetMemoryActual(vm->def);
info->memory = vm->def->mem.cur_balloon;
info->nrVirtCpu = vm->def->vcpus;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
umlDomainGetState(virDomainPtr dom,
int *state,
int *reason,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainGetStateEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*state = virDomainObjGetState(vm, reason);
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static char *umlDomainGetXMLDesc(virDomainPtr dom,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *ret = NULL;
/* Flags checked by virDomainDefFormat */
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
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,
virDomainDefFormatConvertXMLFlags(flags));
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int umlConnectListDefinedDomains(virConnectPtr conn,
char **const names, int nnames) {
struct uml_driver *driver = conn->privateData;
int n;
if (virConnectListDefinedDomainsEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
n = virDomainObjListGetInactiveNames(driver->domains, names, nnames,
virConnectListDefinedDomainsCheckACL, conn);
umlDriverUnlock(driver);
return n;
}
static int umlConnectNumOfDefinedDomains(virConnectPtr conn)
{
struct uml_driver *driver = conn->privateData;
int n;
if (virConnectNumOfDefinedDomainsEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
n = virDomainObjListNumOfDomains(driver->domains, false,
virConnectNumOfDefinedDomainsCheckACL, conn);
umlDriverUnlock(driver);
return n;
}
static int umlDomainCreateWithFlags(virDomainPtr dom, unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_START_AUTODESTROY, -1);
virNWFilterReadLockFilterUpdates();
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainCreateWithFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = umlStartVMDaemon(dom->conn, driver, vm,
(flags & VIR_DOMAIN_START_AUTODESTROY));
virDomainAuditStart(vm, "booted", ret >= 0);
if (ret == 0)
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
cleanup:
if (vm)
virObjectUnlock(vm);
if (event)
umlDomainEventQueue(driver, event);
umlDriverUnlock(driver);
virNWFilterUnlockFilterUpdates();
return ret;
}
static int umlDomainCreate(virDomainPtr dom)
{
return umlDomainCreateWithFlags(dom, 0);
}
static virDomainPtr
umlDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int flags)
{
struct uml_driver *driver = conn->privateData;
virDomainDefPtr def;
virDomainObjPtr vm = NULL;
virDomainPtr dom = 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;
umlDriverLock(driver);
if (!(def = virDomainDefParseString(xml, driver->caps, driver->xmlopt,
parse_flags)))
goto cleanup;
if (virDomainDefineXMLFlagsEnsureACL(conn, def) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
0, NULL)))
goto cleanup;
def = NULL;
vm->persistent = 1;
if (virDomainSaveConfig(driver->configDir,
vm->newDef ? vm->newDef : vm->def) < 0) {
virDomainObjListRemove(driver->domains,
vm);
vm = NULL;
goto cleanup;
}
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
virDomainDefFree(def);
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return dom;
}
static virDomainPtr
umlDomainDefineXML(virConnectPtr conn, const char *xml)
{
return umlDomainDefineXMLFlags(conn, xml, 0);
}
static int umlDomainUndefineFlags(virDomainPtr dom,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
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(driver->configDir, driver->autostartDir, vm) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
vm->persistent = 0;
} else {
virDomainObjListRemove(driver->domains, vm);
vm = NULL;
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
static int umlDomainUndefine(virDomainPtr dom)
{
return umlDomainUndefineFlags(dom, 0);
}
static int umlDomainAttachUmlDisk(struct uml_driver *driver,
virDomainObjPtr vm,
virDomainDiskDefPtr disk)
{
size_t i;
char *cmd = NULL;
char *reply = NULL;
for (i = 0; i < vm->def->ndisks; i++) {
if (STREQ(vm->def->disks[i]->dst, disk->dst)) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("target %s already exists"), disk->dst);
return -1;
}
}
if (!virDomainDiskGetSource(disk)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("disk source path is missing"));
goto error;
}
if (virAsprintf(&cmd, "config %s=%s", disk->dst,
virDomainDiskGetSource(disk)) < 0)
return -1;
if (umlMonitorCommand(driver, vm, cmd, &reply) < 0)
goto error;
if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks+1) < 0)
goto error;
virDomainDiskInsertPreAlloced(vm->def, disk);
VIR_FREE(reply);
VIR_FREE(cmd);
return 0;
error:
VIR_FREE(reply);
VIR_FREE(cmd);
return -1;
}
static int umlDomainAttachDevice(virDomainPtr dom, const char *xml)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDeviceDefPtr dev = NULL;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainAttachDeviceEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot attach device on inactive domain"));
goto cleanup;
}
dev = virDomainDeviceDefParse(xml, vm->def, driver->caps, driver->xmlopt,
VIR_DOMAIN_DEF_PARSE_INACTIVE);
if (dev == NULL)
goto cleanup;
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_UML) {
ret = umlDomainAttachUmlDisk(driver, vm, dev->data.disk);
if (ret == 0)
dev->data.disk = NULL;
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk bus '%s' cannot be hotplugged."),
virDomainDiskBusTypeToString(dev->data.disk->bus));
}
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be attached"),
virDomainDeviceTypeToString(dev->type));
goto cleanup;
}
cleanup:
virDomainDeviceDefFree(dev);
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
static int
umlDomainAttachDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG, -1);
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot modify the persistent configuration of a domain"));
return -1;
}
return umlDomainAttachDevice(dom, xml);
}
static int umlDomainDetachUmlDisk(struct uml_driver *driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
size_t i;
int ret = -1;
virDomainDiskDefPtr detach = NULL;
char *cmd;
char *reply;
for (i = 0; i < vm->def->ndisks; i++) {
if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst))
break;
}
if (i == vm->def->ndisks) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("disk %s not found"), dev->data.disk->dst);
return -1;
}
detach = vm->def->disks[i];
if (virAsprintf(&cmd, "remove %s", detach->dst) < 0)
return -1;
if (umlMonitorCommand(driver, vm, cmd, &reply) < 0)
goto cleanup;
virDomainDiskRemove(vm->def, i);
virDomainDiskDefFree(detach);
ret = 0;
VIR_FREE(reply);
cleanup:
VIR_FREE(cmd);
return ret;
}
static int umlDomainDetachDevice(virDomainPtr dom, const char *xml)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDeviceDefPtr dev = NULL;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainDetachDeviceEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot detach device on inactive domain"));
goto cleanup;
}
dev = virDomainDeviceDefParse(xml, vm->def, driver->caps, driver->xmlopt,
VIR_DOMAIN_DEF_PARSE_INACTIVE);
if (dev == NULL)
goto cleanup;
if (dev->type == VIR_DOMAIN_DEVICE_DISK &&
dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) {
if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_UML)
ret = umlDomainDetachUmlDisk(driver, vm, dev);
else
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("This type of disk cannot be hot unplugged"));
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
"%s", _("This type of device cannot be hot unplugged"));
}
cleanup:
virDomainDeviceDefFree(dev);
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
static int
umlDomainDetachDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG, -1);
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot modify the persistent configuration of a domain"));
return -1;
}
return umlDomainDetachDevice(dom, xml);
}
static int umlDomainGetAutostart(virDomainPtr dom,
int *autostart)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainGetAutostartEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*autostart = vm->autostart;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
static int umlDomainSetAutostart(virDomainPtr dom,
int autostart)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *configFile = NULL, *autostartLink = NULL;
int ret = -1;
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainSetAutostartEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot set autostart for transient domain"));
goto cleanup;
}
autostart = (autostart != 0);
if (vm->autostart != autostart) {
if ((configFile = virDomainConfigFile(driver->configDir, vm->def->name)) == NULL)
goto cleanup;
if ((autostartLink = virDomainConfigFile(driver->autostartDir, vm->def->name)) == NULL)
goto cleanup;
if (autostart) {
if (virFileMakePath(driver->autostartDir) < 0) {
virReportSystemError(errno,
_("cannot create autostart directory %s"),
driver->autostartDir);
goto cleanup;
}
if (symlink(configFile, autostartLink) < 0) {
virReportSystemError(errno,
_("Failed to create symlink '%s to '%s'"),
autostartLink, configFile);
goto cleanup;
}
} else {
if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
virReportSystemError(errno,
_("Failed to delete symlink '%s'"),
autostartLink);
goto cleanup;
}
}
vm->autostart = autostart;
}
ret = 0;
cleanup:
VIR_FREE(configFile);
VIR_FREE(autostartLink);
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
static int
umlDomainBlockPeek(virDomainPtr dom,
const char *path,
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int fd = -1, ret = -1;
const char *actual;
virCheckFlags(0, -1);
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, "%s",
_("no domain with matching uuid"));
goto cleanup;
}
if (virDomainBlockPeekEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!path || path[0] == '\0') {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("NULL or empty path"));
goto cleanup;
}
/* Check the path belongs to this domain. */
if (!(actual = virDomainDiskPathByName(vm->def, path))) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path '%s'"), path);
goto cleanup;
}
path = actual;
/* The path is correct, now try to open it and get its size. */
fd = open(path, O_RDONLY);
if (fd == -1) {
virReportSystemError(errno,
_("cannot open %s"), path);
goto cleanup;
}
/* Seek and read. */
/* NB. Because we configure with AC_SYS_LARGEFILE, off_t should
* be 64 bits on all platforms.
*/
if (lseek(fd, offset, SEEK_SET) == (off_t) -1 ||
saferead(fd, buffer, size) == (ssize_t) -1) {
virReportSystemError(errno,
_("cannot read %s"), path);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
umlDomainOpenConsole(virDomainPtr dom,
const char *dev_name,
virStreamPtr st,
unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
int ret = -1;
virDomainChrDefPtr chr = NULL;
size_t i;
virCheckFlags(0, -1);
umlDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainOpenConsoleEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
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);
goto cleanup;
}
if (virFDStreamOpenFile(st, chr->source.data.file.path,
0, 0, O_RDWR) < 0)
goto cleanup;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
umlDriverUnlock(driver);
return ret;
}
static int
umlConnectDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback callback,
void *opaque,
virFreeCallback freecb)
{
struct uml_driver *driver = conn->privateData;
int ret = 0;
if (virConnectDomainEventRegisterEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
if (virDomainEventStateRegister(conn,
driver->domainEventState,
callback, opaque, freecb) < 0)
ret = -1;
umlDriverUnlock(driver);
return ret;
}
static int
umlConnectDomainEventDeregister(virConnectPtr conn,
virConnectDomainEventCallback callback)
{
struct uml_driver *driver = conn->privateData;
int ret = 0;
if (virConnectDomainEventDeregisterEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
if (virDomainEventStateDeregister(conn,
driver->domainEventState,
callback) < 0)
ret = -1;
umlDriverUnlock(driver);
return ret;
}
static int
umlConnectDomainEventRegisterAny(virConnectPtr conn,
virDomainPtr dom,
int eventID,
virConnectDomainEventGenericCallback callback,
void *opaque,
virFreeCallback freecb)
{
struct uml_driver *driver = conn->privateData;
int ret;
if (virConnectDomainEventRegisterAnyEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
if (virDomainEventStateRegisterID(conn,
driver->domainEventState,
dom, eventID,
callback, opaque, freecb, &ret) < 0)
ret = -1;
umlDriverUnlock(driver);
return ret;
}
static int
umlConnectDomainEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
struct uml_driver *driver = conn->privateData;
int ret = 0;
if (virConnectDomainEventDeregisterAnyEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
if (virObjectEventStateDeregisterID(conn,
driver->domainEventState,
callbackID) < 0)
ret = -1;
umlDriverUnlock(driver);
return ret;
}
/* driver must be locked before calling */
static void umlDomainEventQueue(struct uml_driver *driver,
virObjectEventPtr event)
{
virObjectEventStateQueue(driver->domainEventState, event);
}
static int umlConnectListAllDomains(virConnectPtr conn,
virDomainPtr **domains,
unsigned int flags)
{
struct uml_driver *driver = conn->privateData;
int ret = -1;
virCheckFlags(VIR_CONNECT_LIST_DOMAINS_FILTERS_ALL, -1);
if (virConnectListAllDomainsEnsureACL(conn) < 0)
return -1;
umlDriverLock(driver);
ret = virDomainObjListExport(driver->domains, conn, domains,
virConnectListAllDomainsCheckACL, flags);
umlDriverUnlock(driver);
return ret;
}
static int
umlNodeGetInfo(virConnectPtr conn,
virNodeInfoPtr nodeinfo)
{
if (virNodeGetInfoEnsureACL(conn) < 0)
return -1;
return nodeGetInfo(nodeinfo);
}
static int
umlNodeGetCPUStats(virConnectPtr conn,
int cpuNum,
virNodeCPUStatsPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetCPUStatsEnsureACL(conn) < 0)
return -1;
return nodeGetCPUStats(cpuNum, params, nparams, flags);
}
static int
umlNodeGetMemoryStats(virConnectPtr conn,
int cellNum,
virNodeMemoryStatsPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetMemoryStatsEnsureACL(conn) < 0)
return -1;
return nodeGetMemoryStats(cellNum, params, nparams, flags);
}
static int
umlNodeGetCellsFreeMemory(virConnectPtr conn,
unsigned long long *freeMems,
int startCell,
int maxCells)
{
if (virNodeGetCellsFreeMemoryEnsureACL(conn) < 0)
return -1;
return nodeGetCellsFreeMemory(freeMems, startCell, maxCells);
}
static unsigned long long
umlNodeGetFreeMemory(virConnectPtr conn)
{
unsigned long long freeMem;
if (virNodeGetFreeMemoryEnsureACL(conn) < 0)
return 0;
if (nodeGetMemory(NULL, &freeMem) < 0)
return 0;
return freeMem;
}
static int
umlNodeGetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetMemoryParametersEnsureACL(conn) < 0)
return -1;
return nodeGetMemoryParameters(params, nparams, flags);
}
static int
umlNodeSetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
if (virNodeSetMemoryParametersEnsureACL(conn) < 0)
return -1;
return nodeSetMemoryParameters(params, nparams, flags);
}
static int
umlNodeGetCPUMap(virConnectPtr conn,
unsigned char **cpumap,
unsigned int *online,
unsigned int flags)
{
if (virNodeGetCPUMapEnsureACL(conn) < 0)
return -1;
return nodeGetCPUMap(cpumap, online, flags);
}
static int
umlNodeSuspendForDuration(virConnectPtr conn,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
if (virNodeSuspendForDurationEnsureACL(conn) < 0)
return -1;
return nodeSuspendForDuration(target, duration, flags);
}
static int
umlNodeGetFreePages(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 nodeGetFreePages(npages, pages, startCell, cellCount, counts);
}
static int
umlNodeAllocPages(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 nodeAllocPages(npages, pageSizes, pageCounts,
startCell, cellCount, add);
}
static int
umlDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
{
struct uml_driver *driver = dom->conn->privateData;
int ret = -1;
virDomainObjPtr vm;
virCheckFlags(0, -1);
umlDriverLock(driver);
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
umlDriverUnlock(driver);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN, NULL);
goto cleanup;
}
if (virDomainHasManagedSaveImageEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static virHypervisorDriver umlHypervisorDriver = {
.name = "UML",
.connectOpen = umlConnectOpen, /* 0.5.0 */
.connectClose = umlConnectClose, /* 0.5.0 */
.connectGetType = umlConnectGetType, /* 0.5.0 */
.connectGetVersion = umlConnectGetVersion, /* 0.5.0 */
.connectGetHostname = umlConnectGetHostname, /* 0.5.0 */
.nodeGetInfo = umlNodeGetInfo, /* 0.5.0 */
.connectGetCapabilities = umlConnectGetCapabilities, /* 0.5.0 */
.connectListDomains = umlConnectListDomains, /* 0.5.0 */
.connectNumOfDomains = umlConnectNumOfDomains, /* 0.5.0 */
.connectListAllDomains = umlConnectListAllDomains, /* 0.9.13 */
.domainCreateXML = umlDomainCreateXML, /* 0.5.0 */
.domainLookupByID = umlDomainLookupByID, /* 0.5.0 */
.domainLookupByUUID = umlDomainLookupByUUID, /* 0.5.0 */
.domainLookupByName = umlDomainLookupByName, /* 0.5.0 */
.domainShutdown = umlDomainShutdown, /* 0.5.0 */
.domainShutdownFlags = umlDomainShutdownFlags, /* 0.9.10 */
.domainDestroy = umlDomainDestroy, /* 0.5.0 */
.domainDestroyFlags = umlDomainDestroyFlags, /* 0.9.4 */
.domainGetOSType = umlDomainGetOSType, /* 0.5.0 */
.domainGetMaxMemory = umlDomainGetMaxMemory, /* 0.5.0 */
.domainSetMaxMemory = umlDomainSetMaxMemory, /* 0.5.0 */
.domainSetMemory = umlDomainSetMemory, /* 0.5.0 */
.domainGetInfo = umlDomainGetInfo, /* 0.5.0 */
.domainGetState = umlDomainGetState, /* 0.9.2 */
.domainGetXMLDesc = umlDomainGetXMLDesc, /* 0.5.0 */
.connectListDefinedDomains = umlConnectListDefinedDomains, /* 0.5.0 */
.connectNumOfDefinedDomains = umlConnectNumOfDefinedDomains, /* 0.5.0 */
.domainCreate = umlDomainCreate, /* 0.5.0 */
.domainCreateWithFlags = umlDomainCreateWithFlags, /* 0.8.2 */
.domainDefineXML = umlDomainDefineXML, /* 0.5.0 */
.domainDefineXMLFlags = umlDomainDefineXMLFlags, /* 1.2.12 */
.domainUndefine = umlDomainUndefine, /* 0.5.0 */
.domainUndefineFlags = umlDomainUndefineFlags, /* 0.9.4 */
.domainAttachDevice = umlDomainAttachDevice, /* 0.8.4 */
.domainAttachDeviceFlags = umlDomainAttachDeviceFlags, /* 0.8.4 */
.domainDetachDevice = umlDomainDetachDevice, /* 0.8.4 */
.domainDetachDeviceFlags = umlDomainDetachDeviceFlags, /* 0.8.4 */
.domainGetAutostart = umlDomainGetAutostart, /* 0.5.0 */
.domainSetAutostart = umlDomainSetAutostart, /* 0.5.0 */
.domainBlockPeek = umlDomainBlockPeek, /* 0.5.0 */
.nodeGetCPUStats = umlNodeGetCPUStats, /* 0.9.3 */
.nodeGetMemoryStats = umlNodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = umlNodeGetCellsFreeMemory, /* 0.5.0 */
.nodeGetFreeMemory = umlNodeGetFreeMemory, /* 0.5.0 */
.nodeGetCPUMap = umlNodeGetCPUMap, /* 1.0.0 */
.connectDomainEventRegister = umlConnectDomainEventRegister, /* 0.9.4 */
.connectDomainEventDeregister = umlConnectDomainEventDeregister, /* 0.9.4 */
.connectIsEncrypted = umlConnectIsEncrypted, /* 0.7.3 */
.connectIsSecure = umlConnectIsSecure, /* 0.7.3 */
.domainIsActive = umlDomainIsActive, /* 0.7.3 */
.domainIsPersistent = umlDomainIsPersistent, /* 0.7.3 */
.domainIsUpdated = umlDomainIsUpdated, /* 0.8.6 */
.connectDomainEventRegisterAny = umlConnectDomainEventRegisterAny, /* 0.9.4 */
.connectDomainEventDeregisterAny = umlConnectDomainEventDeregisterAny, /* 0.9.4 */
.domainOpenConsole = umlDomainOpenConsole, /* 0.8.6 */
.connectIsAlive = umlConnectIsAlive, /* 0.9.8 */
.nodeSuspendForDuration = umlNodeSuspendForDuration, /* 0.9.8 */
.nodeGetMemoryParameters = umlNodeGetMemoryParameters, /* 0.10.2 */
.nodeSetMemoryParameters = umlNodeSetMemoryParameters, /* 0.10.2 */
.nodeGetFreePages = umlNodeGetFreePages, /* 1.2.6 */
.nodeAllocPages = umlNodeAllocPages, /* 1.2.9 */
.domainHasManagedSaveImage = umlDomainHasManagedSaveImage, /* 1.2.13 */
};
static virConnectDriver umlConnectDriver = {
.hypervisorDriver = &umlHypervisorDriver,
};
static virStateDriver umlStateDriver = {
.name = "UML",
.stateInitialize = umlStateInitialize,
.stateAutoStart = umlStateAutoStart,
.stateCleanup = umlStateCleanup,
.stateReload = umlStateReload,
};
int umlRegister(void)
{
if (virRegisterConnectDriver(&umlConnectDriver,
true) < 0)
return -1;
if (virRegisterStateDriver(&umlStateDriver) < 0)
return -1;
return 0;
}
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