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libvirt/src/qemu/qemu_tpm.c
Daniel P. Berrangé 9bcbdbd579 src: elevate current identity privilege when fetching secret 
When fetching the value of a private secret, we need to use an elevated
identity otherwise the secret driver will deny access.

When using the modular daemons, the elevated identity needs to be active
before the secret driver connection is opened, and it will apply to all
APIs calls made on that conncetion.

When using the monolithic daemon, the identity at time of opening the
connection is ignored, and the elevated identity needs to be active
precisely at the time the virSecretGetValue API call is made.

After acquiring the secret value, the elevated identity should be
cleared.

This sounds complex, but is fairly straightfoward with the automatic
cleanup callbacks.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2021-05-13 11:07:43 +01:00

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/*
* qemu_tpm.c: QEMU TPM support
*
* Copyright (C) 2018 IBM Corporation
*
* 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 <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include "qemu_extdevice.h"
#include "qemu_domain.h"
#include "qemu_security.h"
#include "conf/domain_conf.h"
#include "vircommand.h"
#include "viralloc.h"
#include "virkmod.h"
#include "viridentity.h"
#include "virlog.h"
#include "virutil.h"
#include "viruuid.h"
#include "virfile.h"
#include "virstring.h"
#include "virpidfile.h"
#include "configmake.h"
#include "qemu_tpm.h"
#include "virtpm.h"
#include "virsecret.h"
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("qemu.tpm");
/*
* qemuTPMCreateEmulatorStoragePath
*
* @swtpmStorageDir: directory for swtpm persistent state
* @uuid: The UUID of the VM for which to create the storage
* @tpmversion: version of the TPM
*
* Create the swtpm's storage path
*/
static char *
qemuTPMCreateEmulatorStoragePath(const char *swtpmStorageDir,
const char *uuidstr,
virDomainTPMVersion tpmversion)
{
char *path = NULL;
const char *dir = "";
switch (tpmversion) {
case VIR_DOMAIN_TPM_VERSION_1_2:
dir = "tpm1.2";
break;
case VIR_DOMAIN_TPM_VERSION_2_0:
dir = "tpm2";
break;
case VIR_DOMAIN_TPM_VERSION_DEFAULT:
case VIR_DOMAIN_TPM_VERSION_LAST:
return NULL;
}
path = g_strdup_printf("%s/%s/%s", swtpmStorageDir, uuidstr, dir);
return path;
}
/**
* qemuTPMCreateEmulatorLogPath:
* @logDir: directory where swtpm writes its logs into
* @vmname: name of the VM
*
* Create the swtpm's log path.
*/
static char*
qemuTPMCreateEmulatorLogPath(const char *logDir,
const char *vmname)
{
return g_strdup_printf("%s/%s-swtpm.log", logDir, vmname);
}
/*
* qemuTPMEmulatorInitStorage
*
* Initialize the TPM Emulator storage by creating its root directory,
* which is typically found in /var/lib/libvirt/tpm.
*
*/
static int
qemuTPMEmulatorInitStorage(const char *swtpmStorageDir)
{
int rc = 0;
/* allow others to cd into this dir */
if (g_mkdir_with_parents(swtpmStorageDir, 0711) < 0) {
virReportSystemError(errno,
_("Could not create TPM directory %s"),
swtpmStorageDir);
rc = -1;
}
return rc;
}
/*
* qemuTPMCreateEmulatorStorage
*
* @storagepath: directory for swtpm's persistent state
* @created: a pointer to a bool that will be set to true if the
* storage was created because it did not exist yet
* @swtpm_user: The uid that needs to be able to access the directory
* @swtpm_group: The gid that needs to be able to access the directory
*
* Unless the storage path for the swtpm for the given VM
* already exists, create it and make it accessible for the given userid.
* Adapt ownership of the directory and all swtpm's state files there.
*/
static int
qemuTPMCreateEmulatorStorage(const char *storagepath,
bool *created,
uid_t swtpm_user,
gid_t swtpm_group)
{
g_autofree char *swtpmStorageDir = g_path_get_dirname(storagepath);
if (qemuTPMEmulatorInitStorage(swtpmStorageDir) < 0)
return -1;
*created = false;
if (!virFileExists(storagepath))
*created = true;
if (virDirCreate(storagepath, 0700, swtpm_user, swtpm_group,
VIR_DIR_CREATE_ALLOW_EXIST) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not create directory %s as %u:%d"),
storagepath, swtpm_user, swtpm_group);
return -1;
}
if (virFileChownFiles(storagepath, swtpm_user, swtpm_group) < 0)
return -1;
return 0;
}
static void
qemuTPMDeleteEmulatorStorage(virDomainTPMDef *tpm)
{
g_autofree char *path = g_path_get_dirname(tpm->data.emulator.storagepath);
ignore_value(virFileDeleteTree(path));
}
/*
* qemuTPMCreateEmulatorSocket:
*
* @swtpmStateDir: the directory where to create the socket in
* @shortName: short and unique name of the domain
*
* Create the Unix socket path from the given parameters
*/
static char *
qemuTPMCreateEmulatorSocket(const char *swtpmStateDir,
const char *shortName)
{
return g_strdup_printf("%s/%s-swtpm.sock", swtpmStateDir, shortName);
}
/*
* qemuTPMEmulatorInitPaths:
*
* @tpm: TPM definition for an emulator type
* @swtpmStorageDir: the general swtpm storage dir which is used as a base
* directory for creating VM specific directories
* @logDir: directory where swtpm writes its logs into
* @vmname: name of the VM
* @uuid: the UUID of the VM
*/
static int
qemuTPMEmulatorInitPaths(virDomainTPMDef *tpm,
const char *swtpmStorageDir,
const char *logDir,
const char *vmname,
const unsigned char *uuid)
{
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(uuid, uuidstr);
if (!tpm->data.emulator.storagepath &&
!(tpm->data.emulator.storagepath =
qemuTPMCreateEmulatorStoragePath(swtpmStorageDir, uuidstr,
tpm->version)))
return -1;
if (!tpm->data.emulator.logfile) {
tpm->data.emulator.logfile = qemuTPMCreateEmulatorLogPath(logDir,
vmname);
}
return 0;
}
/*
* qemuTPMCreatePidFilename
*/
static char *
qemuTPMEmulatorCreatePidFilename(const char *swtpmStateDir,
const char *shortName)
{
g_autofree char *devicename = NULL;
devicename = g_strdup_printf("%s-swtpm", shortName);
return virPidFileBuildPath(swtpmStateDir, devicename);
}
/*
* qemuTPMEmulatorGetPid
*
* @swtpmStateDir: the directory where swtpm writes the pidfile into
* @shortName: short name of the domain
* @pid: pointer to pid
*
* Return -1 upon error, or zero on successful reading of the pidfile.
* If the PID was not still alive, zero will be returned, and @pid will be
* set to -1;
*/
static int
qemuTPMEmulatorGetPid(const char *swtpmStateDir,
const char *shortName,
pid_t *pid)
{
g_autofree char *swtpm = virTPMGetSwtpm();
g_autofree char *pidfile = qemuTPMEmulatorCreatePidFilename(swtpmStateDir,
shortName);
if (!pidfile)
return -1;
if (virPidFileReadPathIfAlive(pidfile, pid, swtpm) < 0)
return -1;
return 0;
}
/*
* qemuTPMEmulatorPrepareHost:
*
* @tpm: tpm definition
* @logDir: directory where swtpm writes its logs into
* @swtpm_user: uid to run the swtpm with
* @swtpm_group: gid to run the swtpm with
* @swtpmStateDir: directory for swtpm's persistent state
* @qemu_user: uid that qemu will run with; we share the socket file with it
* @shortName: short and unique name of the domain
*
* Prepare the log directory for the swtpm and adjust ownership of it and the
* log file we will be using. Prepare the state directory where we will share
* the socket between tss and qemu users.
*/
static int
qemuTPMEmulatorPrepareHost(virDomainTPMDef *tpm,
const char *logDir,
uid_t swtpm_user,
gid_t swtpm_group,
const char *swtpmStateDir,
uid_t qemu_user,
const char *shortName)
{
if (virTPMEmulatorInit() < 0)
return -1;
/* create log dir ... allow 'tss' user to cd into it */
if (g_mkdir_with_parents(logDir, 0711) < 0)
return -1;
/* ... and adjust ownership */
if (virDirCreate(logDir, 0730, swtpm_user, swtpm_group,
VIR_DIR_CREATE_ALLOW_EXIST) < 0)
return -1;
if (!virFileExists(tpm->data.emulator.logfile) &&
virFileTouch(tpm->data.emulator.logfile, 0644) < 0) {
return -1;
}
/* ... and make sure it can be accessed by swtpm_user */
if (chown(tpm->data.emulator.logfile, swtpm_user, swtpm_group) < 0) {
virReportSystemError(errno,
_("Could not chown on swtpm logfile %s"),
tpm->data.emulator.logfile);
return -1;
}
/*
create our swtpm state dir ...
- QEMU user needs to be able to access the socket there
- swtpm group needs to be able to create files there
- in privileged mode 0570 would be enough, for non-privileged mode
we need 0770
*/
if (virDirCreate(swtpmStateDir, 0770, qemu_user, swtpm_group,
VIR_DIR_CREATE_ALLOW_EXIST) < 0)
return -1;
/* create the socket filename */
if (!tpm->data.emulator.source.data.nix.path &&
!(tpm->data.emulator.source.data.nix.path =
qemuTPMCreateEmulatorSocket(swtpmStateDir, shortName)))
return -1;
tpm->data.emulator.source.type = VIR_DOMAIN_CHR_TYPE_UNIX;
return 0;
}
/*
* qemuTPMSetupEncryption
*
* @secretuuid: The UUID with the secret holding passphrase
* @cmd: the virCommand to transfer the secret to
*
* Returns file descriptor representing the read-end of a pipe.
* The passphrase can be read from this pipe. Returns < 0 in case
* of error.
*
* This function reads the passphrase and writes it into the
* write-end of a pipe so that the read-end of the pipe can be
* passed to the emulator for reading the passphrase from.
*
* Note that the returned FD is owned by @cmd.
*/
static int
qemuTPMSetupEncryption(const unsigned char *secretuuid,
virCommand *cmd)
{
g_autoptr(virConnect) conn = NULL;
g_autofree uint8_t *secret = NULL;
size_t secret_len;
virSecretLookupTypeDef seclookupdef = {
.type = VIR_SECRET_LOOKUP_TYPE_UUID,
};
VIR_IDENTITY_AUTORESTORE virIdentity *oldident = virIdentityElevateCurrent();
if (!oldident)
return -1;
conn = virGetConnectSecret();
if (!conn)
return -1;
memcpy(seclookupdef.u.uuid, secretuuid, sizeof(seclookupdef.u.uuid));
if (virSecretGetSecretString(conn, &seclookupdef,
VIR_SECRET_USAGE_TYPE_VTPM,
&secret, &secret_len) < 0)
return -1;
return virCommandSetSendBuffer(cmd, g_steal_pointer(&secret), secret_len);
}
/*
* qemuTPMEmulatorRunSetup
*
* @storagepath: path to the directory for TPM state
* @vmname: the name of the VM
* @vmuuid: the UUID of the VM
* @privileged: whether we are running in privileged mode
* @swtpm_user: The userid to switch to when setting up the TPM;
* typically this should be the uid of 'tss' or 'root'
* @swtpm_group: The group id to switch to
* @logfile: The file to write the log into; it must be writable
* for the user given by userid or 'tss'
* @tpmversion: The version of the TPM, either a TPM 1.2 or TPM 2
* @encryption: pointer to virStorageEncryption holding secret
* @incomingMigration: whether we have an incoming migration
*
* Setup the external swtpm by creating endorsement key and
* certificates for it.
*/
static int
qemuTPMEmulatorRunSetup(const char *storagepath,
const char *vmname,
const unsigned char *vmuuid,
bool privileged,
uid_t swtpm_user,
gid_t swtpm_group,
const char *logfile,
const virDomainTPMVersion tpmversion,
const unsigned char *secretuuid,
bool incomingMigration)
{
g_autoptr(virCommand) cmd = NULL;
int exitstatus;
char uuid[VIR_UUID_STRING_BUFLEN];
g_autofree char *vmid = NULL;
g_autofree char *swtpm_setup = virTPMGetSwtpmSetup();
VIR_AUTOCLOSE pwdfile_fd = -1;
if (!swtpm_setup)
return -1;
if (!privileged && tpmversion == VIR_DOMAIN_TPM_VERSION_1_2)
return virFileWriteStr(logfile,
_("Did not create EK and certificates since "
"this requires privileged mode for a "
"TPM 1.2\n"), 0600);
cmd = virCommandNew(swtpm_setup);
if (!cmd)
return -1;
virUUIDFormat(vmuuid, uuid);
vmid = g_strdup_printf("%s:%s", vmname, uuid);
virCommandSetUID(cmd, swtpm_user);
virCommandSetGID(cmd, swtpm_group);
switch (tpmversion) {
case VIR_DOMAIN_TPM_VERSION_1_2:
break;
case VIR_DOMAIN_TPM_VERSION_2_0:
virCommandAddArgList(cmd, "--tpm2", NULL);
break;
case VIR_DOMAIN_TPM_VERSION_DEFAULT:
case VIR_DOMAIN_TPM_VERSION_LAST:
break;
}
if (secretuuid) {
if (!virTPMSwtpmSetupCapsGet(
VIR_TPM_SWTPM_SETUP_FEATURE_CMDARG_PWDFILE_FD)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
_("%s does not support passing a passphrase using a file "
"descriptor"), swtpm_setup);
return -1;
}
if ((pwdfile_fd = qemuTPMSetupEncryption(secretuuid, cmd)) < 0)
return -1;
virCommandAddArg(cmd, "--pwdfile-fd");
virCommandAddArgFormat(cmd, "%d", pwdfile_fd);
virCommandAddArgList(cmd, "--cipher", "aes-256-cbc", NULL);
virCommandPassFD(cmd, pwdfile_fd, VIR_COMMAND_PASS_FD_CLOSE_PARENT);
pwdfile_fd = -1;
}
if (!incomingMigration) {
virCommandAddArgList(cmd,
"--tpm-state", storagepath,
"--vmid", vmid,
"--logfile", logfile,
"--createek",
"--create-ek-cert",
"--create-platform-cert",
"--lock-nvram",
"--not-overwrite",
NULL);
} else {
virCommandAddArgList(cmd,
"--tpm-state", storagepath,
"--overwrite",
NULL);
}
virCommandClearCaps(cmd);
if (virCommandRun(cmd, &exitstatus) < 0 || exitstatus != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not run '%s'. exitstatus: %d; "
"Check error log '%s' for details."),
swtpm_setup, exitstatus, logfile);
return -1;
}
return 0;
}
/*
* qemuTPMEmulatorBuildCommand:
*
* @tpm: TPM definition
* @vmname: The name of the VM
* @vmuuid: The UUID of the VM
* @privileged: whether we are running in privileged mode
* @swtpm_user: The uid for the swtpm to run as (drop privileges to from root)
* @swtpm_group: The gid for the swtpm to run as
* @swtpmStateDir: the directory where swtpm writes the pid file and creates the
* Unix socket
* @shortName: the short name of the VM
* @incomingMigration: whether we have an incoming migration
*
* Create the virCommand use for starting the emulator
* Do some initializations on the way, such as creation of storage
* and emulator setup.
*/
static virCommand *
qemuTPMEmulatorBuildCommand(virDomainTPMDef *tpm,
const char *vmname,
const unsigned char *vmuuid,
bool privileged,
uid_t swtpm_user,
gid_t swtpm_group,
const char *swtpmStateDir,
const char *shortName,
bool incomingMigration)
{
g_autoptr(virCommand) cmd = NULL;
bool created = false;
g_autofree char *pidfile = NULL;
g_autofree char *swtpm = virTPMGetSwtpm();
int pwdfile_fd = -1;
int migpwdfile_fd = -1;
const unsigned char *secretuuid = NULL;
if (!swtpm)
return NULL;
if (qemuTPMCreateEmulatorStorage(tpm->data.emulator.storagepath,
&created, swtpm_user, swtpm_group) < 0)
return NULL;
if (tpm->data.emulator.hassecretuuid)
secretuuid = tpm->data.emulator.secretuuid;
if (created &&
qemuTPMEmulatorRunSetup(tpm->data.emulator.storagepath, vmname, vmuuid,
privileged, swtpm_user, swtpm_group,
tpm->data.emulator.logfile, tpm->version,
secretuuid, incomingMigration) < 0)
goto error;
unlink(tpm->data.emulator.source.data.nix.path);
cmd = virCommandNew(swtpm);
if (!cmd)
goto error;
virCommandClearCaps(cmd);
virCommandAddArgList(cmd, "socket", "--daemon", "--ctrl", NULL);
virCommandAddArgFormat(cmd, "type=unixio,path=%s,mode=0600",
tpm->data.emulator.source.data.nix.path);
virCommandAddArg(cmd, "--tpmstate");
virCommandAddArgFormat(cmd, "dir=%s,mode=0600",
tpm->data.emulator.storagepath);
virCommandAddArg(cmd, "--log");
virCommandAddArgFormat(cmd, "file=%s", tpm->data.emulator.logfile);
virCommandSetUID(cmd, swtpm_user);
virCommandSetGID(cmd, swtpm_group);
switch (tpm->version) {
case VIR_DOMAIN_TPM_VERSION_1_2:
break;
case VIR_DOMAIN_TPM_VERSION_2_0:
virCommandAddArg(cmd, "--tpm2");
break;
case VIR_DOMAIN_TPM_VERSION_DEFAULT:
case VIR_DOMAIN_TPM_VERSION_LAST:
break;
}
if (!(pidfile = qemuTPMEmulatorCreatePidFilename(swtpmStateDir, shortName)))
goto error;
virCommandAddArg(cmd, "--pid");
virCommandAddArgFormat(cmd, "file=%s", pidfile);
if (tpm->data.emulator.hassecretuuid) {
if (!virTPMSwtpmCapsGet(VIR_TPM_SWTPM_FEATURE_CMDARG_PWD_FD)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
_("%s does not support passing passphrase via file descriptor"),
swtpm);
goto error;
}
pwdfile_fd = qemuTPMSetupEncryption(tpm->data.emulator.secretuuid, cmd);
migpwdfile_fd = qemuTPMSetupEncryption(tpm->data.emulator.secretuuid, cmd);
virCommandAddArg(cmd, "--key");
virCommandAddArgFormat(cmd, "pwdfd=%d,mode=aes-256-cbc", pwdfile_fd);
virCommandAddArg(cmd, "--migration-key");
virCommandAddArgFormat(cmd, "pwdfd=%d,mode=aes-256-cbc", migpwdfile_fd);
}
return g_steal_pointer(&cmd);
error:
if (created)
qemuTPMDeleteEmulatorStorage(tpm);
return NULL;
}
/*
* qemuTPMEmulatorStop
* @swtpmStateDir: A directory where the socket is located
* @shortName: short and unique name of the domain
*
* Gracefully stop the swptm
*/
static void
qemuTPMEmulatorStop(const char *swtpmStateDir,
const char *shortName)
{
virCommand *cmd;
g_autofree char *pathname = NULL;
g_autofree char *errbuf = NULL;
g_autofree char *swtpm_ioctl = virTPMGetSwtpmIoctl();
if (!swtpm_ioctl)
return;
if (virTPMEmulatorInit() < 0)
return;
if (!(pathname = qemuTPMCreateEmulatorSocket(swtpmStateDir, shortName)))
return;
if (!virFileExists(pathname))
return;
cmd = virCommandNew(swtpm_ioctl);
if (!cmd)
return;
virCommandAddArgList(cmd, "--unix", pathname, "-s", NULL);
virCommandSetErrorBuffer(cmd, &errbuf);
ignore_value(virCommandRun(cmd, NULL));
virCommandFree(cmd);
/* clean up the socket */
unlink(pathname);
}
int
qemuExtTPMInitPaths(virQEMUDriver *driver,
virDomainDef *def)
{
g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
size_t i;
for (i = 0; i < def->ntpms; i++) {
if (def->tpms[i]->type != VIR_DOMAIN_TPM_TYPE_EMULATOR)
continue;
return qemuTPMEmulatorInitPaths(def->tpms[i],
cfg->swtpmStorageDir,
cfg->swtpmLogDir,
def->name,
def->uuid);
}
return 0;
}
int
qemuExtTPMPrepareHost(virQEMUDriver *driver,
virDomainDef *def)
{
g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
g_autofree char *shortName = NULL;
size_t i;
for (i = 0; i < def->ntpms; i++) {
if (def->tpms[i]->type != VIR_DOMAIN_TPM_TYPE_EMULATOR)
continue;
shortName = virDomainDefGetShortName(def);
if (!shortName)
return -1;
return qemuTPMEmulatorPrepareHost(def->tpms[i], cfg->swtpmLogDir,
cfg->swtpm_user,
cfg->swtpm_group,
cfg->swtpmStateDir, cfg->user,
shortName);
}
return 0;
}
void
qemuExtTPMCleanupHost(virDomainDef *def)
{
size_t i;
for (i = 0; i < def->ntpms; i++) {
if (def->tpms[i]->type != VIR_DOMAIN_TPM_TYPE_EMULATOR)
continue;
if (!def->tpms[i]->data.emulator.persistent_state)
qemuTPMDeleteEmulatorStorage(def->tpms[i]);
}
}
/*
* qemuExtTPMStartEmulator:
*
* @driver: QEMU driver
* @vm: the domain object
* @incomingMigration: whether we have an incoming migration
*
* Start the external TPM Emulator:
* - have the command line built
* - start the external TPM Emulator and sync with it before QEMU start
*/
static int
qemuExtTPMStartEmulator(virQEMUDriver *driver,
virDomainObj *vm,
virDomainTPMDef *tpm,
bool incomingMigration)
{
g_autoptr(virCommand) cmd = NULL;
int exitstatus = 0;
g_autofree char *errbuf = NULL;
g_autoptr(virQEMUDriverConfig) cfg = NULL;
g_autofree char *shortName = virDomainDefGetShortName(vm->def);
int cmdret = 0, timeout, rc;
pid_t pid;
if (!shortName)
return -1;
cfg = virQEMUDriverGetConfig(driver);
/* stop any left-over TPM emulator for this VM */
qemuTPMEmulatorStop(cfg->swtpmStateDir, shortName);
if (!(cmd = qemuTPMEmulatorBuildCommand(tpm, vm->def->name, vm->def->uuid,
driver->privileged,
cfg->swtpm_user,
cfg->swtpm_group,
cfg->swtpmStateDir, shortName,
incomingMigration)))
return -1;
if (qemuExtDeviceLogCommand(driver, vm, cmd, "TPM Emulator") < 0)
return -1;
virCommandSetErrorBuffer(cmd, &errbuf);
if (qemuSecurityStartTPMEmulator(driver, vm, cmd,
cfg->swtpm_user, cfg->swtpm_group,
&exitstatus, &cmdret) < 0)
return -1;
if (cmdret < 0 || exitstatus != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not start 'swtpm'. exitstatus: %d, "
"error: %s"), exitstatus, errbuf);
return -1;
}
/* check that the swtpm has written its pid into the file */
timeout = 1000; /* ms */
while (timeout > 0) {
rc = qemuTPMEmulatorGetPid(cfg->swtpmStateDir, shortName, &pid);
if (rc < 0) {
timeout -= 50;
g_usleep(50 * 1000);
continue;
}
if (rc == 0 && pid == (pid_t)-1)
goto error;
break;
}
if (timeout <= 0)
goto error;
return 0;
error:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("swtpm failed to start"));
return -1;
}
int
qemuExtTPMStart(virQEMUDriver *driver,
virDomainObj *vm,
bool incomingMigration)
{
size_t i;
for (i = 0; i < vm->def->ntpms; i++) {
if (vm->def->tpms[i]->type != VIR_DOMAIN_TPM_TYPE_EMULATOR)
continue;
return qemuExtTPMStartEmulator(driver, vm, vm->def->tpms[i],
incomingMigration);
}
return 0;
}
void
qemuExtTPMStop(virQEMUDriver *driver,
virDomainObj *vm)
{
g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
size_t i;
for (i = 0; i < vm->def->ntpms; i++) {
g_autofree char *shortName = NULL;
if (vm->def->tpms[i]->type != VIR_DOMAIN_TPM_TYPE_EMULATOR)
continue;
shortName = virDomainDefGetShortName(vm->def);
if (!shortName)
return;
qemuTPMEmulatorStop(cfg->swtpmStateDir, shortName);
qemuSecurityCleanupTPMEmulator(driver, vm);
}
return;
}
int
qemuExtTPMSetupCgroup(virQEMUDriver *driver,
virDomainDef *def,
virCgroup *cgroup)
{
g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
int rc;
pid_t pid;
size_t i;
for (i = 0; i < def->ntpms; i++) {
g_autofree char *shortName = NULL;
if (def->tpms[i]->type != VIR_DOMAIN_TPM_TYPE_EMULATOR)
continue;
shortName = virDomainDefGetShortName(def);
if (!shortName)
return -1;
rc = qemuTPMEmulatorGetPid(cfg->swtpmStateDir, shortName, &pid);
if (rc < 0 || (rc == 0 && pid == (pid_t)-1)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Could not get process id of swtpm"));
return -1;
}
if (virCgroupAddProcess(cgroup, pid) < 0)
return -1;
}
return 0;
}
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