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libvirt/src/qemu/qemu_conf.c
Cole Robinson 4b9fa11450 qemu: Move PORT definitions to qemu_conf.c 
Which is the only user. That was the only reason for including
qemu_command.h, though we need to explicitly include qemu_domain.h
afterwards.
2016-02-17 11:07:21 -05:00

1567 lines
46 KiB
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/*
* qemu_conf.c: QEMU configuration management
*
* Copyright (C) 2006-2014 Red Hat, Inc.
* Copyright (C) 2006 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 <string.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include "virerror.h"
#include "qemu_conf.h"
#include "qemu_capabilities.h"
#include "qemu_domain.h"
#include "viruuid.h"
#include "virbuffer.h"
#include "virconf.h"
#include "viralloc.h"
#include "datatypes.h"
#include "virxml.h"
#include "nodeinfo.h"
#include "virlog.h"
#include "cpu/cpu.h"
#include "domain_nwfilter.h"
#include "virfile.h"
#include "virstring.h"
#include "viratomic.h"
#include "storage_conf.h"
#include "configmake.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
VIR_LOG_INIT("qemu.qemu_conf");
/* These are only defaults, they can be changed now in qemu.conf and
* explicitly specified port is checked against these two (makes
* sense to limit the values).
*
* This limitation is mentioned in qemu.conf, so bear in mind that the
* configuration file should reflect any changes made to these values.
*/
#define QEMU_REMOTE_PORT_MIN 5900
#define QEMU_REMOTE_PORT_MAX 65535
#define QEMU_WEBSOCKET_PORT_MIN 5700
#define QEMU_WEBSOCKET_PORT_MAX 65535
#define QEMU_MIGRATION_PORT_MIN 49152
#define QEMU_MIGRATION_PORT_MAX 49215
static virClassPtr virQEMUDriverConfigClass;
static void virQEMUDriverConfigDispose(void *obj);
static int virQEMUConfigOnceInit(void)
{
virQEMUDriverConfigClass = virClassNew(virClassForObject(),
"virQEMUDriverConfig",
sizeof(virQEMUDriverConfig),
virQEMUDriverConfigDispose);
if (!virQEMUDriverConfigClass)
return -1;
else
return 0;
}
VIR_ONCE_GLOBAL_INIT(virQEMUConfig)
static void
qemuDriverLock(virQEMUDriverPtr driver)
{
virMutexLock(&driver->lock);
}
static void
qemuDriverUnlock(virQEMUDriverPtr driver)
{
virMutexUnlock(&driver->lock);
}
void qemuDomainCmdlineDefFree(qemuDomainCmdlineDefPtr def)
{
size_t i;
if (!def)
return;
for (i = 0; i < def->num_args; i++)
VIR_FREE(def->args[i]);
for (i = 0; i < def->num_env; i++) {
VIR_FREE(def->env_name[i]);
VIR_FREE(def->env_value[i]);
}
VIR_FREE(def->args);
VIR_FREE(def->env_name);
VIR_FREE(def->env_value);
VIR_FREE(def);
}
static int ATTRIBUTE_UNUSED
virQEMUDriverConfigLoaderNVRAMParse(virQEMUDriverConfigPtr cfg,
const char *list)
{
int ret = -1;
char **token;
size_t i, j;
if (!(token = virStringSplit(list, ":", 0)))
goto cleanup;
for (i = 0; token[i]; i += 2) {
if (!token[i] || !token[i + 1] ||
STREQ(token[i], "") || STREQ(token[i + 1], "")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Invalid --with-loader-nvram list: %s"),
list);
goto cleanup;
}
}
if (i) {
if (VIR_ALLOC_N(cfg->loader, i / 2) < 0 ||
VIR_ALLOC_N(cfg->nvram, i / 2) < 0)
goto cleanup;
cfg->nloader = i / 2;
for (j = 0; j < i / 2; j++) {
if (VIR_STRDUP(cfg->loader[j], token[2 * j]) < 0 ||
VIR_STRDUP(cfg->nvram[j], token[2 * j + 1]) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
virStringFreeList(token);
return ret;
}
#define VIR_QEMU_OVMF_LOADER_PATH "/usr/share/OVMF/OVMF_CODE.fd"
#define VIR_QEMU_OVMF_NVRAM_PATH "/usr/share/OVMF/OVMF_VARS.fd"
#define VIR_QEMU_AAVMF_LOADER_PATH "/usr/share/AAVMF/AAVMF_CODE.fd"
#define VIR_QEMU_AAVMF_NVRAM_PATH "/usr/share/AAVMF/AAVMF_VARS.fd"
virQEMUDriverConfigPtr virQEMUDriverConfigNew(bool privileged)
{
virQEMUDriverConfigPtr cfg;
if (virQEMUConfigInitialize() < 0)
return NULL;
if (!(cfg = virObjectNew(virQEMUDriverConfigClass)))
return NULL;
cfg->uri = privileged ? "qemu:///system" : "qemu:///session";
if (privileged) {
if (virGetUserID(QEMU_USER, &cfg->user) < 0)
goto error;
if (virGetGroupID(QEMU_GROUP, &cfg->group) < 0)
goto error;
} else {
cfg->user = (uid_t)-1;
cfg->group = (gid_t)-1;
}
cfg->dynamicOwnership = privileged;
cfg->cgroupControllers = -1; /* -1 == auto-detect */
if (privileged) {
if (virAsprintf(&cfg->logDir,
"%s/log/libvirt/qemu", LOCALSTATEDIR) < 0)
goto error;
if (VIR_STRDUP(cfg->configBaseDir, SYSCONFDIR "/libvirt") < 0)
goto error;
if (virAsprintf(&cfg->stateDir,
"%s/run/libvirt/qemu", LOCALSTATEDIR) < 0)
goto error;
if (virAsprintf(&cfg->cacheDir,
"%s/cache/libvirt/qemu", LOCALSTATEDIR) < 0)
goto error;
if (virAsprintf(&cfg->libDir,
"%s/lib/libvirt/qemu", LOCALSTATEDIR) < 0)
goto error;
if (virAsprintf(&cfg->saveDir, "%s/save", cfg->libDir) < 0)
goto error;
if (virAsprintf(&cfg->snapshotDir, "%s/snapshot", cfg->libDir) < 0)
goto error;
if (virAsprintf(&cfg->autoDumpPath, "%s/dump", cfg->libDir) < 0)
goto error;
if (virAsprintf(&cfg->channelTargetDir,
"%s/channel/target", cfg->libDir) < 0)
goto error;
if (virAsprintf(&cfg->nvramDir, "%s/nvram", cfg->libDir) < 0)
goto error;
} else {
char *rundir;
char *cachedir;
cachedir = virGetUserCacheDirectory();
if (!cachedir)
goto error;
if (virAsprintf(&cfg->logDir,
"%s/qemu/log", cachedir) < 0) {
VIR_FREE(cachedir);
goto error;
}
if (virAsprintf(&cfg->cacheDir, "%s/qemu/cache", cachedir) < 0) {
VIR_FREE(cachedir);
goto error;
}
VIR_FREE(cachedir);
rundir = virGetUserRuntimeDirectory();
if (!rundir)
goto error;
if (virAsprintf(&cfg->stateDir, "%s/qemu/run", rundir) < 0) {
VIR_FREE(rundir);
goto error;
}
VIR_FREE(rundir);
if (!(cfg->configBaseDir = virGetUserConfigDirectory()))
goto error;
if (virAsprintf(&cfg->libDir, "%s/qemu/lib", cfg->configBaseDir) < 0)
goto error;
if (virAsprintf(&cfg->saveDir, "%s/qemu/save", cfg->configBaseDir) < 0)
goto error;
if (virAsprintf(&cfg->snapshotDir, "%s/qemu/snapshot", cfg->configBaseDir) < 0)
goto error;
if (virAsprintf(&cfg->autoDumpPath, "%s/qemu/dump", cfg->configBaseDir) < 0)
goto error;
if (virAsprintf(&cfg->channelTargetDir,
"%s/qemu/channel/target", cfg->configBaseDir) < 0)
goto error;
if (virAsprintf(&cfg->nvramDir,
"%s/qemu/nvram", cfg->configBaseDir) < 0)
goto error;
}
if (virAsprintf(&cfg->configDir, "%s/qemu", cfg->configBaseDir) < 0)
goto error;
if (virAsprintf(&cfg->autostartDir, "%s/qemu/autostart", cfg->configBaseDir) < 0)
goto error;
if (VIR_STRDUP(cfg->vncListen, "127.0.0.1") < 0)
goto error;
if (VIR_STRDUP(cfg->vncTLSx509certdir, SYSCONFDIR "/pki/libvirt-vnc") < 0)
goto error;
if (VIR_STRDUP(cfg->spiceListen, "127.0.0.1") < 0)
goto error;
if (VIR_STRDUP(cfg->spiceTLSx509certdir,
SYSCONFDIR "/pki/libvirt-spice") < 0)
goto error;
cfg->remotePortMin = QEMU_REMOTE_PORT_MIN;
cfg->remotePortMax = QEMU_REMOTE_PORT_MAX;
cfg->webSocketPortMin = QEMU_WEBSOCKET_PORT_MIN;
cfg->webSocketPortMax = QEMU_WEBSOCKET_PORT_MAX;
cfg->migrationPortMin = QEMU_MIGRATION_PORT_MIN;
cfg->migrationPortMax = QEMU_MIGRATION_PORT_MAX;
/* For privileged driver, try and find hugetlbfs mounts automatically.
* Non-privileged driver requires admin to create a dir for the
* user, chown it, and then let user configure it manually. */
if (privileged &&
virFileFindHugeTLBFS(&cfg->hugetlbfs, &cfg->nhugetlbfs) < 0) {
/* This however is not implemented on all platforms. */
virErrorPtr err = virGetLastError();
if (err && err->code != VIR_ERR_NO_SUPPORT)
goto error;
}
if (VIR_STRDUP(cfg->bridgeHelperName, QEMU_BRIDGE_HELPER) < 0)
goto error;
cfg->clearEmulatorCapabilities = true;
cfg->securityDefaultConfined = true;
cfg->securityRequireConfined = false;
cfg->keepAliveInterval = 5;
cfg->keepAliveCount = 5;
cfg->seccompSandbox = -1;
cfg->logTimestamp = true;
#ifdef DEFAULT_LOADER_NVRAM
if (virQEMUDriverConfigLoaderNVRAMParse(cfg, DEFAULT_LOADER_NVRAM) < 0)
goto error;
#else
if (VIR_ALLOC_N(cfg->loader, 2) < 0 ||
VIR_ALLOC_N(cfg->nvram, 2) < 0)
goto error;
cfg->nloader = 2;
if (VIR_STRDUP(cfg->loader[0], VIR_QEMU_AAVMF_LOADER_PATH) < 0 ||
VIR_STRDUP(cfg->nvram[0], VIR_QEMU_AAVMF_NVRAM_PATH) < 0 ||
VIR_STRDUP(cfg->loader[1], VIR_QEMU_OVMF_LOADER_PATH) < 0 ||
VIR_STRDUP(cfg->nvram[1], VIR_QEMU_OVMF_NVRAM_PATH) < 0)
goto error;
#endif
return cfg;
error:
virObjectUnref(cfg);
return NULL;
}
static void virQEMUDriverConfigDispose(void *obj)
{
virQEMUDriverConfigPtr cfg = obj;
virStringFreeList(cfg->cgroupDeviceACL);
VIR_FREE(cfg->configBaseDir);
VIR_FREE(cfg->configDir);
VIR_FREE(cfg->autostartDir);
VIR_FREE(cfg->logDir);
VIR_FREE(cfg->stateDir);
VIR_FREE(cfg->libDir);
VIR_FREE(cfg->cacheDir);
VIR_FREE(cfg->saveDir);
VIR_FREE(cfg->snapshotDir);
VIR_FREE(cfg->channelTargetDir);
VIR_FREE(cfg->nvramDir);
VIR_FREE(cfg->vncTLSx509certdir);
VIR_FREE(cfg->vncListen);
VIR_FREE(cfg->vncPassword);
VIR_FREE(cfg->vncSASLdir);
VIR_FREE(cfg->spiceTLSx509certdir);
VIR_FREE(cfg->spiceListen);
VIR_FREE(cfg->spicePassword);
VIR_FREE(cfg->spiceSASLdir);
while (cfg->nhugetlbfs) {
cfg->nhugetlbfs--;
VIR_FREE(cfg->hugetlbfs[cfg->nhugetlbfs].mnt_dir);
}
VIR_FREE(cfg->hugetlbfs);
VIR_FREE(cfg->bridgeHelperName);
VIR_FREE(cfg->saveImageFormat);
VIR_FREE(cfg->dumpImageFormat);
VIR_FREE(cfg->autoDumpPath);
virStringFreeList(cfg->securityDriverNames);
VIR_FREE(cfg->lockManagerName);
while (cfg->nloader) {
VIR_FREE(cfg->loader[cfg->nloader - 1]);
VIR_FREE(cfg->nvram[cfg->nloader - 1]);
cfg->nloader--;
}
VIR_FREE(cfg->loader);
VIR_FREE(cfg->nvram);
}
static int
virQEMUDriverConfigHugeTLBFSInit(virHugeTLBFSPtr hugetlbfs,
const char *path,
bool deflt)
{
int ret = -1;
if (VIR_STRDUP(hugetlbfs->mnt_dir, path) < 0)
goto cleanup;
if (virFileGetHugepageSize(path, &hugetlbfs->size) < 0)
goto cleanup;
hugetlbfs->deflt = deflt;
ret = 0;
cleanup:
return ret;
}
static int
virQEMUDriverConfigNVRAMParse(const char *str,
char **loader,
char **nvram)
{
int ret = -1;
char **token;
if (!(token = virStringSplit(str, ":", 0)))
goto cleanup;
if (token[0]) {
virSkipSpaces((const char **) &token[0]);
if (token[1])
virSkipSpaces((const char **) &token[1]);
}
/* Exactly two tokens are expected */
if (!token[0] || !token[1] || token[2] ||
STREQ(token[0], "") || STREQ(token[1], "")) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Invalid nvram format: '%s'"),
str);
goto cleanup;
}
if (VIR_STRDUP(*loader, token[0]) < 0 ||
VIR_STRDUP(*nvram, token[1]) < 0)
goto cleanup;
ret = 0;
cleanup:
virStringFreeList(token);
return ret;
}
int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr cfg,
const char *filename)
{
virConfPtr conf = NULL;
virConfValuePtr p;
int ret = -1;
size_t i;
char *stdioHandler = NULL;
/* Just check the file is readable before opening it, otherwise
* libvirt emits an error.
*/
if (access(filename, R_OK) == -1) {
VIR_INFO("Could not read qemu config file %s", filename);
return 0;
}
if (!(conf = virConfReadFile(filename, 0)))
goto cleanup;
#define CHECK_TYPE(name, typ) \
if (p && p->type != (typ)) { \
virReportError(VIR_ERR_INTERNAL_ERROR, \
"%s: %s: expected type " #typ, \
filename, (name)); \
goto cleanup; \
}
#define CHECK_TYPE_ALT(name, type1, type2) \
if (p && (p->type != (type1) && p->type != (type2))) { \
virReportError(VIR_ERR_INTERNAL_ERROR, \
"%s: %s: expected type " #type1, \
filename, (name)); \
goto cleanup; \
}
#define GET_VALUE_LONG(NAME, VAR) \
p = virConfGetValue(conf, NAME); \
CHECK_TYPE_ALT(NAME, VIR_CONF_LONG, VIR_CONF_ULONG); \
if (p) \
VAR = p->l;
#define GET_VALUE_ULONG(NAME, VAR) \
p = virConfGetValue(conf, NAME); \
CHECK_TYPE(NAME, VIR_CONF_ULONG); \
if (p) \
VAR = p->l;
#define GET_VALUE_BOOL(NAME, VAR) \
p = virConfGetValue(conf, NAME); \
CHECK_TYPE(NAME, VIR_CONF_ULONG); \
if (p) \
VAR = p->l != 0;
#define GET_VALUE_STR(NAME, VAR) \
p = virConfGetValue(conf, NAME); \
CHECK_TYPE(NAME, VIR_CONF_STRING); \
if (p && p->str) { \
VIR_FREE(VAR); \
if (VIR_STRDUP(VAR, p->str) < 0) \
goto cleanup; \
}
GET_VALUE_BOOL("vnc_auto_unix_socket", cfg->vncAutoUnixSocket);
GET_VALUE_BOOL("vnc_tls", cfg->vncTLS);
GET_VALUE_BOOL("vnc_tls_x509_verify", cfg->vncTLSx509verify);
GET_VALUE_STR("vnc_tls_x509_cert_dir", cfg->vncTLSx509certdir);
GET_VALUE_STR("vnc_listen", cfg->vncListen);
GET_VALUE_STR("vnc_password", cfg->vncPassword);
GET_VALUE_BOOL("vnc_sasl", cfg->vncSASL);
GET_VALUE_STR("vnc_sasl_dir", cfg->vncSASLdir);
GET_VALUE_BOOL("vnc_allow_host_audio", cfg->vncAllowHostAudio);
GET_VALUE_BOOL("nographics_allow_host_audio", cfg->nogfxAllowHostAudio);
p = virConfGetValue(conf, "security_driver");
if (p && p->type == VIR_CONF_LIST) {
size_t len, j;
virConfValuePtr pp;
/* Calc length and check items */
for (len = 0, pp = p->list; pp; len++, pp = pp->next) {
if (pp->type != VIR_CONF_STRING) {
virReportError(VIR_ERR_CONF_SYNTAX, "%s",
_("security_driver must be a list of strings"));
goto cleanup;
}
}
if (VIR_ALLOC_N(cfg->securityDriverNames, len + 1) < 0)
goto cleanup;
for (i = 0, pp = p->list; pp; i++, pp = pp->next) {
for (j = 0; j < i; j++) {
if (STREQ(pp->str, cfg->securityDriverNames[j])) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Duplicate security driver %s"), pp->str);
goto cleanup;
}
}
if (VIR_STRDUP(cfg->securityDriverNames[i], pp->str) < 0)
goto cleanup;
}
cfg->securityDriverNames[len] = NULL;
} else {
CHECK_TYPE("security_driver", VIR_CONF_STRING);
if (p && p->str) {
if (VIR_ALLOC_N(cfg->securityDriverNames, 2) < 0)
goto cleanup;
if (VIR_STRDUP(cfg->securityDriverNames[0], p->str) < 0)
goto cleanup;
cfg->securityDriverNames[1] = NULL;
}
}
GET_VALUE_BOOL("security_default_confined", cfg->securityDefaultConfined);
GET_VALUE_BOOL("security_require_confined", cfg->securityRequireConfined);
GET_VALUE_BOOL("spice_tls", cfg->spiceTLS);
GET_VALUE_STR("spice_tls_x509_cert_dir", cfg->spiceTLSx509certdir);
GET_VALUE_BOOL("spice_sasl", cfg->spiceSASL);
GET_VALUE_STR("spice_sasl_dir", cfg->spiceSASLdir);
GET_VALUE_STR("spice_listen", cfg->spiceListen);
GET_VALUE_STR("spice_password", cfg->spicePassword);
GET_VALUE_ULONG("remote_websocket_port_min", cfg->webSocketPortMin);
if (cfg->webSocketPortMin < QEMU_WEBSOCKET_PORT_MIN) {
/* if the port is too low, we can't get the display name
* to tell to vnc (usually subtract 5700, e.g. localhost:1
* for port 5701) */
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: remote_websocket_port_min: port must be greater "
"than or equal to %d"),
filename, QEMU_WEBSOCKET_PORT_MIN);
goto cleanup;
}
GET_VALUE_ULONG("remote_websocket_port_max", cfg->webSocketPortMax);
if (cfg->webSocketPortMax > QEMU_WEBSOCKET_PORT_MAX ||
cfg->webSocketPortMax < cfg->webSocketPortMin) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: remote_websocket_port_max: port must be between "
"the minimal port and %d"),
filename, QEMU_WEBSOCKET_PORT_MAX);
goto cleanup;
}
if (cfg->webSocketPortMin > cfg->webSocketPortMax) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: remote_websocket_port_min: min port must not be "
"greater than max port"), filename);
goto cleanup;
}
GET_VALUE_ULONG("remote_display_port_min", cfg->remotePortMin);
if (cfg->remotePortMin < QEMU_REMOTE_PORT_MIN) {
/* if the port is too low, we can't get the display name
* to tell to vnc (usually subtract 5900, e.g. localhost:1
* for port 5901) */
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: remote_display_port_min: port must be greater "
"than or equal to %d"),
filename, QEMU_REMOTE_PORT_MIN);
goto cleanup;
}
GET_VALUE_ULONG("remote_display_port_max", cfg->remotePortMax);
if (cfg->remotePortMax > QEMU_REMOTE_PORT_MAX ||
cfg->remotePortMax < cfg->remotePortMin) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: remote_display_port_max: port must be between "
"the minimal port and %d"),
filename, QEMU_REMOTE_PORT_MAX);
goto cleanup;
}
if (cfg->remotePortMin > cfg->remotePortMax) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: remote_display_port_min: min port must not be "
"greater than max port"), filename);
goto cleanup;
}
GET_VALUE_ULONG("migration_port_min", cfg->migrationPortMin);
if (cfg->migrationPortMin <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: migration_port_min: port must be greater than 0"),
filename);
goto cleanup;
}
GET_VALUE_ULONG("migration_port_max", cfg->migrationPortMax);
if (cfg->migrationPortMax > 65535 ||
cfg->migrationPortMax < cfg->migrationPortMin) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: migration_port_max: port must be between "
"the minimal port %d and 65535"),
filename, cfg->migrationPortMin);
goto cleanup;
}
p = virConfGetValue(conf, "user");
CHECK_TYPE("user", VIR_CONF_STRING);
if (p && p->str &&
virGetUserID(p->str, &cfg->user) < 0)
goto cleanup;
p = virConfGetValue(conf, "group");
CHECK_TYPE("group", VIR_CONF_STRING);
if (p && p->str &&
virGetGroupID(p->str, &cfg->group) < 0)
goto cleanup;
GET_VALUE_BOOL("dynamic_ownership", cfg->dynamicOwnership);
p = virConfGetValue(conf, "cgroup_controllers");
CHECK_TYPE("cgroup_controllers", VIR_CONF_LIST);
if (p) {
cfg->cgroupControllers = 0;
virConfValuePtr pp;
for (i = 0, pp = p->list; pp; ++i, pp = pp->next) {
int ctl;
if (pp->type != VIR_CONF_STRING) {
virReportError(VIR_ERR_CONF_SYNTAX, "%s",
_("cgroup_controllers must be a "
"list of strings"));
goto cleanup;
}
if ((ctl = virCgroupControllerTypeFromString(pp->str)) < 0) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Unknown cgroup controller '%s'"), pp->str);
goto cleanup;
}
cfg->cgroupControllers |= (1 << ctl);
}
}
p = virConfGetValue(conf, "cgroup_device_acl");
CHECK_TYPE("cgroup_device_acl", VIR_CONF_LIST);
if (p) {
int len = 0;
virConfValuePtr pp;
for (pp = p->list; pp; pp = pp->next)
len++;
if (VIR_ALLOC_N(cfg->cgroupDeviceACL, 1+len) < 0)
goto cleanup;
for (i = 0, pp = p->list; pp; ++i, pp = pp->next) {
if (pp->type != VIR_CONF_STRING) {
virReportError(VIR_ERR_CONF_SYNTAX, "%s",
_("cgroup_device_acl must be a "
"list of strings"));
goto cleanup;
}
if (VIR_STRDUP(cfg->cgroupDeviceACL[i], pp->str) < 0)
goto cleanup;
}
cfg->cgroupDeviceACL[i] = NULL;
}
GET_VALUE_STR("save_image_format", cfg->saveImageFormat);
GET_VALUE_STR("dump_image_format", cfg->dumpImageFormat);
GET_VALUE_STR("snapshot_image_format", cfg->snapshotImageFormat);
GET_VALUE_STR("auto_dump_path", cfg->autoDumpPath);
GET_VALUE_BOOL("auto_dump_bypass_cache", cfg->autoDumpBypassCache);
GET_VALUE_BOOL("auto_start_bypass_cache", cfg->autoStartBypassCache);
/* Some crazy backcompat. Back in the old days, this was just a pure
* string. We must continue supporting it. These days however, this may be
* an array of strings. */
p = virConfGetValue(conf, "hugetlbfs_mount");
if (p) {
/* There already might be something autodetected. Avoid leaking it. */
while (cfg->nhugetlbfs) {
cfg->nhugetlbfs--;
VIR_FREE(cfg->hugetlbfs[cfg->nhugetlbfs].mnt_dir);
}
VIR_FREE(cfg->hugetlbfs);
if (p->type == VIR_CONF_LIST) {
size_t len = 0;
virConfValuePtr pp = p->list;
/* Calc length and check items */
while (pp) {
if (pp->type != VIR_CONF_STRING) {
virReportError(VIR_ERR_CONF_SYNTAX, "%s",
_("hugetlbfs_mount must be a list of strings"));
goto cleanup;
}
len++;
pp = pp->next;
}
if (len && VIR_ALLOC_N(cfg->hugetlbfs, len) < 0)
goto cleanup;
cfg->nhugetlbfs = len;
pp = p->list;
len = 0;
while (pp) {
if (virQEMUDriverConfigHugeTLBFSInit(&cfg->hugetlbfs[len],
pp->str, !len) < 0)
goto cleanup;
len++;
pp = pp->next;
}
} else {
CHECK_TYPE("hugetlbfs_mount", VIR_CONF_STRING);
if (STRNEQ(p->str, "")) {
if (VIR_ALLOC_N(cfg->hugetlbfs, 1) < 0)
goto cleanup;
cfg->nhugetlbfs = 1;
if (virQEMUDriverConfigHugeTLBFSInit(&cfg->hugetlbfs[0],
p->str, true) < 0)
goto cleanup;
}
}
}
GET_VALUE_STR("bridge_helper", cfg->bridgeHelperName);
GET_VALUE_BOOL("mac_filter", cfg->macFilter);
GET_VALUE_BOOL("relaxed_acs_check", cfg->relaxedACS);
GET_VALUE_BOOL("clear_emulator_capabilities", cfg->clearEmulatorCapabilities);
GET_VALUE_BOOL("allow_disk_format_probing", cfg->allowDiskFormatProbing);
GET_VALUE_BOOL("set_process_name", cfg->setProcessName);
GET_VALUE_ULONG("max_processes", cfg->maxProcesses);
GET_VALUE_ULONG("max_files", cfg->maxFiles);
GET_VALUE_STR("lock_manager", cfg->lockManagerName);
GET_VALUE_STR("stdio_handler", stdioHandler);
if (stdioHandler) {
if (STREQ(stdioHandler, "logd")) {
cfg->stdioLogD = true;
} else if (STREQ(stdioHandler, "file")) {
cfg->stdioLogD = false;
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unknown stdio handler %s"),
stdioHandler);
VIR_FREE(stdioHandler);
goto cleanup;
}
VIR_FREE(stdioHandler);
} else {
cfg->stdioLogD = true;
}
GET_VALUE_ULONG("max_queued", cfg->maxQueuedJobs);
GET_VALUE_LONG("keepalive_interval", cfg->keepAliveInterval);
GET_VALUE_ULONG("keepalive_count", cfg->keepAliveCount);
GET_VALUE_LONG("seccomp_sandbox", cfg->seccompSandbox);
GET_VALUE_STR("migration_host", cfg->migrateHost);
virStringStripIPv6Brackets(cfg->migrateHost);
if (cfg->migrateHost &&
(STRPREFIX(cfg->migrateHost, "localhost") ||
virSocketAddrIsNumericLocalhost(cfg->migrateHost))) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("migration_host must not be the address of"
" the local machine: %s"),
cfg->migrateHost);
goto cleanup;
}
GET_VALUE_STR("migration_address", cfg->migrationAddress);
virStringStripIPv6Brackets(cfg->migrationAddress);
if (cfg->migrationAddress &&
(STRPREFIX(cfg->migrationAddress, "localhost") ||
virSocketAddrIsNumericLocalhost(cfg->migrationAddress))) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("migration_address must not be the address of"
" the local machine: %s"),
cfg->migrationAddress);
goto cleanup;
}
GET_VALUE_BOOL("log_timestamp", cfg->logTimestamp);
if ((p = virConfGetValue(conf, "nvram"))) {
size_t len;
virConfValuePtr pp;
CHECK_TYPE("nvram", VIR_CONF_LIST);
while (cfg->nloader) {
VIR_FREE(cfg->loader[cfg->nloader - 1]);
VIR_FREE(cfg->nvram[cfg->nloader - 1]);
cfg->nloader--;
}
VIR_FREE(cfg->loader);
VIR_FREE(cfg->nvram);
/* Calc length and check items */
for (len = 0, pp = p->list; pp; len++, pp = pp->next) {
if (pp->type != VIR_CONF_STRING) {
virReportError(VIR_ERR_CONF_SYNTAX, "%s",
_("nvram must be a list of strings"));
goto cleanup;
}
}
if (len &&
(VIR_ALLOC_N(cfg->loader, len) < 0 ||
VIR_ALLOC_N(cfg->nvram, len) < 0))
goto cleanup;
cfg->nloader = len;
for (i = 0, pp = p->list; pp; i++, pp = pp->next) {
if (virQEMUDriverConfigNVRAMParse(pp->str,
&cfg->loader[i],
&cfg->nvram[i]) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
virConfFree(conf);
return ret;
}
#undef GET_VALUE_LONG
#undef GET_VALUE_ULONG
#undef GET_VALUE_BOOL
#undef GET_VALUE_STR
virQEMUDriverConfigPtr virQEMUDriverGetConfig(virQEMUDriverPtr driver)
{
virQEMUDriverConfigPtr conf;
qemuDriverLock(driver);
conf = virObjectRef(driver->config);
qemuDriverUnlock(driver);
return conf;
}
bool
virQEMUDriverIsPrivileged(virQEMUDriverPtr driver)
{
return driver->privileged;
}
virDomainXMLOptionPtr
virQEMUDriverCreateXMLConf(virQEMUDriverPtr driver)
{
virQEMUDriverDomainDefParserConfig.priv = driver;
return virDomainXMLOptionNew(&virQEMUDriverDomainDefParserConfig,
&virQEMUDriverPrivateDataCallbacks,
&virQEMUDriverDomainXMLNamespace);
}
virCapsPtr virQEMUDriverCreateCapabilities(virQEMUDriverPtr driver)
{
size_t i, j;
virCapsPtr caps;
virSecurityManagerPtr *sec_managers = NULL;
/* Security driver data */
const char *doi, *model, *lbl, *type;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
const int virtTypes[] = {VIR_DOMAIN_VIRT_KVM,
VIR_DOMAIN_VIRT_QEMU,};
/* Basic host arch / guest machine capabilities */
if (!(caps = virQEMUCapsInit(driver->qemuCapsCache)))
goto error;
if (virGetHostUUID(caps->host.host_uuid)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot get the host uuid"));
goto error;
}
/* access sec drivers and create a sec model for each one */
if (!(sec_managers = virSecurityManagerGetNested(driver->securityManager)))
goto error;
/* calculate length */
for (i = 0; sec_managers[i]; i++)
;
caps->host.nsecModels = i;
if (VIR_ALLOC_N(caps->host.secModels, caps->host.nsecModels) < 0)
goto error;
for (i = 0; sec_managers[i]; i++) {
virCapsHostSecModelPtr sm = &caps->host.secModels[i];
doi = virSecurityManagerGetDOI(sec_managers[i]);
model = virSecurityManagerGetModel(sec_managers[i]);
if (VIR_STRDUP(sm->model, model) < 0 ||
VIR_STRDUP(sm->doi, doi) < 0)
goto error;
for (j = 0; j < ARRAY_CARDINALITY(virtTypes); j++) {
lbl = virSecurityManagerGetBaseLabel(sec_managers[i], virtTypes[j]);
type = virDomainVirtTypeToString(virtTypes[j]);
if (lbl &&
virCapabilitiesHostSecModelAddBaseLabel(sm, type, lbl) < 0)
goto error;
}
VIR_DEBUG("Initialized caps for security driver \"%s\" with "
"DOI \"%s\"", model, doi);
}
VIR_FREE(sec_managers);
virObjectUnref(cfg);
return caps;
error:
VIR_FREE(sec_managers);
virObjectUnref(caps);
virObjectUnref(cfg);
return NULL;
}
/**
* virQEMUDriverGetCapabilities:
*
* Get a reference to the virCapsPtr instance for the
* driver. If @refresh is true, the capabilities will be
* rebuilt first
*
* The caller must release the reference with virObjetUnref
*
* Returns: a reference to a virCapsPtr instance or NULL
*/
virCapsPtr virQEMUDriverGetCapabilities(virQEMUDriverPtr driver,
bool refresh)
{
virCapsPtr ret = NULL;
if (refresh) {
virCapsPtr caps = NULL;
if ((caps = virQEMUDriverCreateCapabilities(driver)) == NULL)
return NULL;
qemuDriverLock(driver);
virObjectUnref(driver->caps);
driver->caps = caps;
} else {
qemuDriverLock(driver);
}
if (driver->caps->nguests == 0 && !refresh) {
VIR_DEBUG("Capabilities didn't detect any guests. Forcing a "
"refresh.");
qemuDriverUnlock(driver);
return virQEMUDriverGetCapabilities(driver, true);
}
ret = virObjectRef(driver->caps);
qemuDriverUnlock(driver);
return ret;
}
struct _qemuSharedDeviceEntry {
size_t ref;
char **domains; /* array of domain names */
};
/* Construct the hash key for sharedDevices as "major:minor" */
char *
qemuGetSharedDeviceKey(const char *device_path)
{
int maj, min;
char *key = NULL;
int rc;
if ((rc = virGetDeviceID(device_path, &maj, &min)) < 0) {
virReportSystemError(-rc,
_("Unable to get minor number of device '%s'"),
device_path);
return NULL;
}
if (virAsprintf(&key, "%d:%d", maj, min) < 0)
return NULL;
return key;
}
/*
* Make necessary checks for the need to check and for the current setting
* of the 'unpriv_sgio' value for the device_path passed.
*
* Returns:
* 0 - Success
* -1 - Some failure which would already have been messaged
* -2 - Mismatch with the "shared" sgio setting - needs to be messaged
* by caller since it has context of which type of disk resource is
* being used and in the future the hostdev information.
*/
static int
qemuCheckUnprivSGIO(virHashTablePtr sharedDevices,
const char *device_path,
int sgio)
{
char *sysfs_path = NULL;
char *key = NULL;
int val;
int ret = -1;
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(device_path, NULL)))
goto cleanup;
/* It can't be conflict if unpriv_sgio is not supported by kernel. */
if (!virFileExists(sysfs_path)) {
ret = 0;
goto cleanup;
}
if (!(key = qemuGetSharedDeviceKey(device_path)))
goto cleanup;
/* It can't be conflict if no other domain is sharing it. */
if (!(virHashLookup(sharedDevices, key))) {
ret = 0;
goto cleanup;
}
if (virGetDeviceUnprivSGIO(device_path, NULL, &val) < 0)
goto cleanup;
/* Error message on failure needs to be handled in caller
* since there is more specific knowledge of device
*/
if (!((val == 0 &&
(sgio == VIR_DOMAIN_DEVICE_SGIO_FILTERED ||
sgio == VIR_DOMAIN_DEVICE_SGIO_DEFAULT)) ||
(val == 1 &&
sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED))) {
ret = -2;
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(sysfs_path);
VIR_FREE(key);
return ret;
}
/* Check if a shared device's setting conflicts with the conf
* used by other domain(s). Currently only checks the sgio
* setting. Note that this should only be called for disk with
* block source if the device type is disk.
*
* Returns 0 if no conflicts, otherwise returns -1.
*/
static int
qemuCheckSharedDisk(virHashTablePtr sharedDevices,
virDomainDiskDefPtr disk)
{
int ret;
if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN)
return 0;
if ((ret = qemuCheckUnprivSGIO(sharedDevices, disk->src->path,
disk->sgio)) < 0) {
if (ret == -2) {
if (virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_VOLUME) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared disk 'pool=%s' 'volume=%s' "
"conflicts with other active domains"),
disk->src->srcpool->pool,
disk->src->srcpool->volume);
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
_("sgio of shared disk '%s' conflicts with "
"other active domains"),
disk->src->path);
}
}
return -1;
}
return 0;
}
bool
qemuSharedDeviceEntryDomainExists(qemuSharedDeviceEntryPtr entry,
const char *name,
int *idx)
{
size_t i;
for (i = 0; i < entry->ref; i++) {
if (STREQ(entry->domains[i], name)) {
if (idx)
*idx = i;
return true;
}
}
return false;
}
void
qemuSharedDeviceEntryFree(void *payload, const void *name ATTRIBUTE_UNUSED)
{
qemuSharedDeviceEntryPtr entry = payload;
size_t i;
if (!entry)
return;
for (i = 0; i < entry->ref; i++)
VIR_FREE(entry->domains[i]);
VIR_FREE(entry->domains);
VIR_FREE(entry);
}
static int
qemuSharedDeviceEntryInsert(virQEMUDriverPtr driver,
const char *key,
const char *name)
{
qemuSharedDeviceEntry *entry = NULL;
if ((entry = virHashLookup(driver->sharedDevices, key))) {
/* Nothing to do if the shared scsi host device is already
* recorded in the table.
*/
if (!qemuSharedDeviceEntryDomainExists(entry, name, NULL)) {
if (VIR_EXPAND_N(entry->domains, entry->ref, 1) < 0 ||
VIR_STRDUP(entry->domains[entry->ref - 1], name) < 0) {
/* entry is owned by the hash table here */
entry = NULL;
goto error;
}
}
} else {
if (VIR_ALLOC(entry) < 0 ||
VIR_ALLOC_N(entry->domains, 1) < 0 ||
VIR_STRDUP(entry->domains[0], name) < 0)
goto error;
entry->ref = 1;
if (virHashAddEntry(driver->sharedDevices, key, entry))
goto error;
}
return 0;
error:
qemuSharedDeviceEntryFree(entry, NULL);
return -1;
}
/* qemuAddSharedDisk:
* @driver: Pointer to qemu driver struct
* @src: disk source
* @name: The domain name
*
* Increase ref count and add the domain name into the list which
* records all the domains that use the shared device if the entry
* already exists, otherwise add a new entry.
*/
static int
qemuAddSharedDisk(virQEMUDriverPtr driver,
virDomainDiskDefPtr disk,
const char *name)
{
char *key = NULL;
int ret = -1;
if (!disk->src->shared || !virDomainDiskSourceIsBlockType(disk->src, false))
return 0;
qemuDriverLock(driver);
if (qemuCheckSharedDisk(driver->sharedDevices, disk) < 0)
goto cleanup;
if (!(key = qemuGetSharedDeviceKey(virDomainDiskGetSource(disk))))
goto cleanup;
if (qemuSharedDeviceEntryInsert(driver, key, name) < 0)
goto cleanup;
ret = 0;
cleanup:
qemuDriverUnlock(driver);
VIR_FREE(key);
return ret;
}
static bool
qemuIsSharedHostdev(virDomainHostdevDefPtr hostdev)
{
return (hostdev->shareable &&
(hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI &&
hostdev->source.subsys.u.scsi.protocol !=
VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI));
}
static char *
qemuGetHostdevPath(virDomainHostdevDefPtr hostdev)
{
virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
char *dev_name = NULL;
char *dev_path = NULL;
if (!(dev_name = virSCSIDeviceGetDevName(NULL,
scsihostsrc->adapter,
scsihostsrc->bus,
scsihostsrc->target,
scsihostsrc->unit)))
goto cleanup;
ignore_value(virAsprintf(&dev_path, "/dev/%s", dev_name));
cleanup:
VIR_FREE(dev_name);
return dev_path;
}
static int
qemuAddSharedHostdev(virQEMUDriverPtr driver,
virDomainHostdevDefPtr hostdev,
const char *name)
{
char *dev_path = NULL;
char *key = NULL;
int ret = -1;
if (!qemuIsSharedHostdev(hostdev))
return 0;
if (!(dev_path = qemuGetHostdevPath(hostdev)))
goto cleanup;
if (!(key = qemuGetSharedDeviceKey(dev_path)))
goto cleanup;
qemuDriverLock(driver);
ret = qemuSharedDeviceEntryInsert(driver, key, name);
qemuDriverUnlock(driver);
cleanup:
VIR_FREE(dev_path);
VIR_FREE(key);
return ret;
}
static int
qemuSharedDeviceEntryRemove(virQEMUDriverPtr driver,
const char *key,
const char *name)
{
qemuSharedDeviceEntryPtr entry = NULL;
int idx;
if (!(entry = virHashLookup(driver->sharedDevices, key)))
return -1;
/* Nothing to do if the shared disk is not recored in the table. */
if (!qemuSharedDeviceEntryDomainExists(entry, name, &idx))
return 0;
if (entry->ref != 1)
VIR_DELETE_ELEMENT(entry->domains, idx, entry->ref);
else
ignore_value(virHashRemoveEntry(driver->sharedDevices, key));
return 0;
}
/* qemuAddSharedDevice:
* @driver: Pointer to qemu driver struct
* @dev: The device def
* @name: The domain name
*
* Increase ref count and add the domain name into the list which
* records all the domains that use the shared device if the entry
* already exists, otherwise add a new entry.
*/
int
qemuAddSharedDevice(virQEMUDriverPtr driver,
virDomainDeviceDefPtr dev,
const char *name)
{
/* Currently the only conflicts we have to care about for
* the shared disk and shared host device is "sgio" setting,
* which is only valid for block disk and scsi host device.
*/
if (dev->type == VIR_DOMAIN_DEVICE_DISK)
return qemuAddSharedDisk(driver, dev->data.disk, name);
else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV)
return qemuAddSharedHostdev(driver, dev->data.hostdev, name);
else
return 0;
}
int
qemuRemoveSharedDisk(virQEMUDriverPtr driver,
virDomainDiskDefPtr disk,
const char *name)
{
char *key = NULL;
int ret = -1;
if (!disk->src->shared || !virDomainDiskSourceIsBlockType(disk->src, false))
return 0;
qemuDriverLock(driver);
if (!(key = qemuGetSharedDeviceKey(virDomainDiskGetSource(disk))))
goto cleanup;
if (qemuSharedDeviceEntryRemove(driver, key, name) < 0)
goto cleanup;
ret = 0;
cleanup:
qemuDriverUnlock(driver);
VIR_FREE(key);
return ret;
}
static int
qemuRemoveSharedHostdev(virQEMUDriverPtr driver,
virDomainHostdevDefPtr hostdev,
const char *name)
{
char *dev_path = NULL;
char *key = NULL;
int ret = -1;
if (!qemuIsSharedHostdev(hostdev))
return 0;
if (!(dev_path = qemuGetHostdevPath(hostdev)))
goto cleanup;
if (!(key = qemuGetSharedDeviceKey(dev_path)))
goto cleanup;
qemuDriverLock(driver);
ret = qemuSharedDeviceEntryRemove(driver, key, name);
qemuDriverUnlock(driver);
cleanup:
VIR_FREE(dev_path);
VIR_FREE(key);
return ret;
}
/* qemuRemoveSharedDevice:
* @driver: Pointer to qemu driver struct
* @device: The device def
* @name: The domain name
*
* Decrease ref count and remove the domain name from the list which
* records all the domains that use the shared device if ref is not
* 1, otherwise remove the entry.
*/
int
qemuRemoveSharedDevice(virQEMUDriverPtr driver,
virDomainDeviceDefPtr dev,
const char *name)
{
if (dev->type == VIR_DOMAIN_DEVICE_DISK)
return qemuRemoveSharedDisk(driver, dev->data.disk, name);
else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV)
return qemuRemoveSharedHostdev(driver, dev->data.hostdev, name);
else
return 0;
}
int
qemuSetUnprivSGIO(virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk = NULL;
virDomainHostdevDefPtr hostdev = NULL;
char *sysfs_path = NULL;
const char *path = NULL;
int val = -1;
int ret = -1;
/* "sgio" is only valid for block disk; cdrom
* and floopy disk can have empty source.
*/
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
disk = dev->data.disk;
if (disk->device != VIR_DOMAIN_DISK_DEVICE_LUN ||
!virDomainDiskSourceIsBlockType(disk->src, false))
return 0;
path = virDomainDiskGetSource(disk);
} else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) {
hostdev = dev->data.hostdev;
if (!qemuIsSharedHostdev(hostdev))
return 0;
if (hostdev->source.subsys.u.scsi.sgio) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("'sgio' is not supported for SCSI "
"generic device yet "));
goto cleanup;
}
return 0;
} else {
return 0;
}
if (!(sysfs_path = virGetUnprivSGIOSysfsPath(path, NULL)))
goto cleanup;
/* By default, filter the SG_IO commands, i.e. set unpriv_sgio to 0. */
val = (disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED);
/* Do not do anything if unpriv_sgio is not supported by the kernel and the
* whitelist is enabled. But if requesting unfiltered access, always call
* virSetDeviceUnprivSGIO, to report an error for unsupported unpriv_sgio.
*/
if ((virFileExists(sysfs_path) || val == 1) &&
virSetDeviceUnprivSGIO(path, NULL, val) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(sysfs_path);
return ret;
}
int qemuDriverAllocateID(virQEMUDriverPtr driver)
{
return virAtomicIntInc(&driver->lastvmid);
}
int
qemuTranslateSnapshotDiskSourcePool(virConnectPtr conn ATTRIBUTE_UNUSED,
virDomainSnapshotDiskDefPtr def)
{
if (def->src->type != VIR_STORAGE_TYPE_VOLUME)
return 0;
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Snapshots are not yet supported with 'pool' volumes"));
return -1;
}
char *
qemuGetHugepagePath(virHugeTLBFSPtr hugepage)
{
char *ret;
if (virAsprintf(&ret, "%s/libvirt/qemu", hugepage->mnt_dir) < 0)
return NULL;
return ret;
}
char *
qemuGetDefaultHugepath(virHugeTLBFSPtr hugetlbfs,
size_t nhugetlbfs)
{
size_t i;
for (i = 0; i < nhugetlbfs; i++)
if (hugetlbfs[i].deflt)
break;
if (i == nhugetlbfs)
i = 0;
return qemuGetHugepagePath(&hugetlbfs[i]);
}
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