External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-10-13 17:49:16 +00:00
Code Issues Packages Projects Releases Wiki Activity
038eb472a0
libvirt/src/qemu/qemu_conf.c
Michal Privoznik 038eb472a0 qemu: Expose rx/tx_queue_size in qemu.conf too 
In 2074ef6cd4 and c56cdf259 (and friends) we've added two
attributes to virtio NICs: rx_queue_size and tx_queue_size.
However, sysadmins might want to set these on per-host basis but
don't necessarily have an access to domain XML (e.g. because they
are generated by some other app). So let's expose them under
qemu.conf (the settings from domain XML still take precedence as
they are more specific ones).

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
2018-02-02 07:09:22 +01:00

1824 lines
55 KiB
C
Raw Blame History

/*
* 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 "qemu_security.h"
#include "viruuid.h"
#include "virbuffer.h"
#include "virconf.h"
#include "viralloc.h"
#include "datatypes.h"
#include "virxml.h"
#include "virlog.h"
#include "cpu/cpu.h"
#include "domain_nwfilter.h"
#include "virfile.h"
#include "virsocketaddr.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);
}
#ifndef DEFAULT_LOADER_NVRAM
# define DEFAULT_LOADER_NVRAM \
"/usr/share/OVMF/OVMF_CODE.fd:/usr/share/OVMF/OVMF_VARS.fd:" \
"/usr/share/OVMF/OVMF_CODE.secboot.fd:/usr/share/OVMF/OVMF_VARS.fd:" \
"/usr/share/AAVMF/AAVMF_CODE.fd:/usr/share/AAVMF/AAVMF_VARS.fd:" \
"/usr/share/AAVMF/AAVMF32_CODE.fd:/usr/share/AAVMF/AAVMF32_VARS.fd"
#endif
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;
if (virAsprintf(&cfg->memoryBackingDir, "%s/ram", 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->memoryBackingDir, "%s/qemu/ram", 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;
/* Set the default directory to find TLS X.509 certificates.
* This will then be used as a fallback if the service specific
* directory doesn't exist (although we don't check if this exists).
*/
if (VIR_STRDUP(cfg->defaultTLSx509certdir,
SYSCONFDIR "/pki/qemu") < 0)
goto error;
if (VIR_STRDUP(cfg->vncListen, VIR_LOOPBACK_IPV4_ADDR) < 0)
goto error;
if (VIR_STRDUP(cfg->spiceListen, VIR_LOOPBACK_IPV4_ADDR) < 0)
goto error;
/*
* If a "SYSCONFDIR" + "pki/libvirt-<val>" exists, then assume someone
* has created a val specific area to place service specific certificates.
*
* If the service specific directory doesn't exist, 'assume' that the
* user has created and populated the "SYSCONFDIR" + "pki/libvirt-default".
*/
#define SET_TLS_X509_CERT_DEFAULT(val) \
do { \
if (virFileExists(SYSCONFDIR "/pki/libvirt-"#val)) { \
if (VIR_STRDUP(cfg->val ## TLSx509certdir, \
SYSCONFDIR "/pki/libvirt-"#val) < 0) \
goto error; \
} else { \
if (VIR_STRDUP(cfg->val ## TLSx509certdir, \
cfg->defaultTLSx509certdir) < 0) \
goto error; \
} \
} while (0)
SET_TLS_X509_CERT_DEFAULT(vnc);
SET_TLS_X509_CERT_DEFAULT(spice);
SET_TLS_X509_CERT_DEFAULT(chardev);
SET_TLS_X509_CERT_DEFAULT(migrate);
SET_TLS_X509_CERT_DEFAULT(vxhs);
#undef SET_TLS_X509_CERT_DEFAULT
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;
cfg->glusterDebugLevel = 4;
cfg->stdioLogD = true;
if (!(cfg->namespaces = virBitmapNew(QEMU_DOMAIN_NS_LAST)))
goto error;
if (privileged &&
qemuDomainNamespaceAvailable(QEMU_DOMAIN_NS_MOUNT) &&
virBitmapSetBit(cfg->namespaces, QEMU_DOMAIN_NS_MOUNT) < 0)
goto error;
if (virFirmwareParseList(DEFAULT_LOADER_NVRAM,
&cfg->firmwares,
&cfg->nfirmwares) < 0)
goto error;
return cfg;
error:
virObjectUnref(cfg);
return NULL;
}
static void virQEMUDriverConfigDispose(void *obj)
{
virQEMUDriverConfigPtr cfg = obj;
virBitmapFree(cfg->namespaces);
virStringListFree(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->defaultTLSx509certdir);
VIR_FREE(cfg->defaultTLSx509secretUUID);
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);
VIR_FREE(cfg->chardevTLSx509certdir);
VIR_FREE(cfg->chardevTLSx509secretUUID);
VIR_FREE(cfg->vxhsTLSx509certdir);
VIR_FREE(cfg->migrateTLSx509certdir);
VIR_FREE(cfg->migrateTLSx509secretUUID);
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->snapshotImageFormat);
VIR_FREE(cfg->autoDumpPath);
virStringListFree(cfg->securityDriverNames);
VIR_FREE(cfg->lockManagerName);
virFirmwareFreeList(cfg->firmwares, cfg->nfirmwares);
VIR_FREE(cfg->memoryBackingDir);
}
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;
}
/**
* @cfg: Just read config TLS values
*
* If the default_tls_x509_cert_dir was uncommented or changed from
* the default value assigned to the *_tls_x509_cert_dir values when
* virQEMUDriverConfigNew was executed, we need to check if we need
* to update the other defaults.
*
* Returns 0 on success, -1 on failure
*/
static int
virQEMUDriverConfigTLSDirResetDefaults(virQEMUDriverConfigPtr cfg)
{
/* Not changed or set to the default default, nothing to do */
if (!cfg->checkdefaultTLSx509certdir ||
STREQ(cfg->defaultTLSx509certdir, SYSCONFDIR "/pki/qemu"))
return 0;
#define CHECK_RESET_CERT_DIR_DEFAULT(val) \
do { \
if (STREQ(cfg->val ## TLSx509certdir, SYSCONFDIR "/pki/qemu")) { \
VIR_FREE(cfg->val ## TLSx509certdir); \
if (VIR_STRDUP(cfg->val ## TLSx509certdir, \
cfg->defaultTLSx509certdir) < 0) \
return -1; \
} \
} while (0)
CHECK_RESET_CERT_DIR_DEFAULT(vnc);
CHECK_RESET_CERT_DIR_DEFAULT(spice);
CHECK_RESET_CERT_DIR_DEFAULT(chardev);
CHECK_RESET_CERT_DIR_DEFAULT(migrate);
CHECK_RESET_CERT_DIR_DEFAULT(vxhs);
return 0;
}
int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr cfg,
const char *filename,
bool privileged)
{
virConfPtr conf = NULL;
int ret = -1;
int rv;
size_t i, j;
char *stdioHandler = NULL;
char *user = NULL, *group = NULL;
char **controllers = NULL;
char **hugetlbfs = NULL;
char **nvram = NULL;
char *corestr = NULL;
char **namespaces = 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;
if ((rv = virConfGetValueString(conf, "default_tls_x509_cert_dir", &cfg->defaultTLSx509certdir)) < 0)
goto cleanup;
cfg->checkdefaultTLSx509certdir = (rv == 1);
if (virConfGetValueBool(conf, "default_tls_x509_verify", &cfg->defaultTLSx509verify) < 0)
goto cleanup;
if (virConfGetValueString(conf, "default_tls_x509_secret_uuid",
&cfg->defaultTLSx509secretUUID) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "vnc_auto_unix_socket", &cfg->vncAutoUnixSocket) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "vnc_tls", &cfg->vncTLS) < 0)
goto cleanup;
if ((rv = virConfGetValueBool(conf, "vnc_tls_x509_verify", &cfg->vncTLSx509verify)) < 0)
goto cleanup;
if (rv == 0)
cfg->vncTLSx509verify = cfg->defaultTLSx509verify;
if (virConfGetValueString(conf, "vnc_tls_x509_cert_dir", &cfg->vncTLSx509certdir) < 0)
goto cleanup;
if (virConfGetValueString(conf, "vnc_listen", &cfg->vncListen) < 0)
goto cleanup;
if (virConfGetValueString(conf, "vnc_password", &cfg->vncPassword) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "vnc_sasl", &cfg->vncSASL) < 0)
goto cleanup;
if (virConfGetValueString(conf, "vnc_sasl_dir", &cfg->vncSASLdir) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "vnc_allow_host_audio", &cfg->vncAllowHostAudio) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "nographics_allow_host_audio", &cfg->nogfxAllowHostAudio) < 0)
goto cleanup;
if (virConfGetValueStringList(conf, "security_driver", true, &cfg->securityDriverNames) < 0)
goto cleanup;
for (i = 0; cfg->securityDriverNames && cfg->securityDriverNames[i] != NULL; i++) {
for (j = i + 1; cfg->securityDriverNames[j] != NULL; j++) {
if (STREQ(cfg->securityDriverNames[i],
cfg->securityDriverNames[j])) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Duplicate security driver %s"),
cfg->securityDriverNames[i]);
goto cleanup;
}
}
}
if (virConfGetValueBool(conf, "security_default_confined", &cfg->securityDefaultConfined) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "security_require_confined", &cfg->securityRequireConfined) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "spice_tls", &cfg->spiceTLS) < 0)
goto cleanup;
if (virConfGetValueString(conf, "spice_tls_x509_cert_dir", &cfg->spiceTLSx509certdir) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "spice_sasl", &cfg->spiceSASL) < 0)
goto cleanup;
if (virConfGetValueString(conf, "spice_sasl_dir", &cfg->spiceSASLdir) < 0)
goto cleanup;
if (virConfGetValueString(conf, "spice_listen", &cfg->spiceListen) < 0)
goto cleanup;
if (virConfGetValueString(conf, "spice_password", &cfg->spicePassword) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "spice_auto_unix_socket", &cfg->spiceAutoUnixSocket) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "vxhs_tls", &cfg->vxhsTLS) < 0)
goto cleanup;
if (virConfGetValueString(conf, "vxhs_tls_x509_cert_dir", &cfg->vxhsTLSx509certdir) < 0)
goto cleanup;
#define GET_CONFIG_TLS_CERTINFO(val) \
do { \
if ((rv = virConfGetValueBool(conf, #val "_tls_x509_verify", \
&cfg->val## TLSx509verify)) < 0) \
goto cleanup; \
if (rv == 0) \
cfg->val## TLSx509verify = cfg->defaultTLSx509verify; \
if ((rv = virConfGetValueString(conf, #val "_tls_x509_cert_dir", \
&cfg->val## TLSx509certdir)) < 0) \
goto cleanup; \
if (virConfGetValueString(conf, \
#val "_tls_x509_secret_uuid", \
&cfg->val## TLSx509secretUUID) < 0) \
goto cleanup; \
/* Only if a *tls_x509_cert_dir wasn't found (e.g. rv == 0), should \
* we copy the defaultTLSx509secretUUID. If this environment needs \
* a passphrase to decode the certificate, then it should provide \
* it's own secretUUID for that. */ \
if (rv == 0 && !cfg->val## TLSx509secretUUID && \
cfg->defaultTLSx509secretUUID) { \
if (VIR_STRDUP(cfg->val## TLSx509secretUUID, \
cfg->defaultTLSx509secretUUID) < 0) \
goto cleanup; \
} \
} while (0)
if (virConfGetValueBool(conf, "chardev_tls", &cfg->chardevTLS) < 0)
goto cleanup;
GET_CONFIG_TLS_CERTINFO(chardev);
GET_CONFIG_TLS_CERTINFO(migrate);
#undef GET_CONFIG_TLS_CERTINFO
if (virQEMUDriverConfigTLSDirResetDefaults(cfg) < 0)
goto cleanup;
if (virConfGetValueUInt(conf, "remote_websocket_port_min", &cfg->webSocketPortMin) < 0)
goto cleanup;
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;
}
if (virConfGetValueUInt(conf, "remote_websocket_port_max", &cfg->webSocketPortMax) < 0)
goto cleanup;
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;
}
if (virConfGetValueUInt(conf, "remote_display_port_min", &cfg->remotePortMin) < 0)
goto cleanup;
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;
}
if (virConfGetValueUInt(conf, "remote_display_port_max", &cfg->remotePortMax) < 0)
goto cleanup;
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;
}
if (virConfGetValueUInt(conf, "migration_port_min", &cfg->migrationPortMin) < 0)
goto cleanup;
if (cfg->migrationPortMin <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("%s: migration_port_min: port must be greater than 0"),
filename);
goto cleanup;
}
if (virConfGetValueUInt(conf, "migration_port_max", &cfg->migrationPortMax) < 0)
goto cleanup;
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;
}
if (virConfGetValueString(conf, "user", &user) < 0)
goto cleanup;
if (user && virGetUserID(user, &cfg->user) < 0)
goto cleanup;
if (virConfGetValueString(conf, "group", &group) < 0)
goto cleanup;
if (group && virGetGroupID(group, &cfg->group) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "dynamic_ownership", &cfg->dynamicOwnership) < 0)
goto cleanup;
if (virConfGetValueStringList(conf, "cgroup_controllers", false,
&controllers) < 0)
goto cleanup;
if (controllers) {
cfg-> cgroupControllers = 0;
for (i = 0; controllers[i] != NULL; i++) {
int ctl;
if ((ctl = virCgroupControllerTypeFromString(controllers[i])) < 0) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Unknown cgroup controller '%s'"),
controllers[i]);
goto cleanup;
}
cfg->cgroupControllers |= (1 << ctl);
}
}
if (virConfGetValueStringList(conf, "cgroup_device_acl", false,
&cfg->cgroupDeviceACL) < 0)
goto cleanup;
if (virConfGetValueString(conf, "save_image_format", &cfg->saveImageFormat) < 0)
goto cleanup;
if (virConfGetValueString(conf, "dump_image_format", &cfg->dumpImageFormat) < 0)
goto cleanup;
if (virConfGetValueString(conf, "snapshot_image_format", &cfg->snapshotImageFormat) < 0)
goto cleanup;
if (virConfGetValueString(conf, "auto_dump_path", &cfg->autoDumpPath) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "auto_dump_bypass_cache", &cfg->autoDumpBypassCache) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "auto_start_bypass_cache", &cfg->autoStartBypassCache) < 0)
goto cleanup;
if (virConfGetValueStringList(conf, "hugetlbfs_mount", true,
&hugetlbfs) < 0)
goto cleanup;
if (hugetlbfs) {
/* 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);
cfg->nhugetlbfs = virStringListLength((const char *const *)hugetlbfs);
if (hugetlbfs[0] &&
VIR_ALLOC_N(cfg->hugetlbfs, cfg->nhugetlbfs) < 0)
goto cleanup;
for (i = 0; hugetlbfs[i] != NULL; i++) {
if (virQEMUDriverConfigHugeTLBFSInit(&cfg->hugetlbfs[i],
hugetlbfs[i], i != 0) < 0)
goto cleanup;
}
}
if (virConfGetValueString(conf, "bridge_helper", &cfg->bridgeHelperName) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "mac_filter", &cfg->macFilter) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "relaxed_acs_check", &cfg->relaxedACS) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "clear_emulator_capabilities", &cfg->clearEmulatorCapabilities) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "allow_disk_format_probing", &cfg->allowDiskFormatProbing) < 0)
goto cleanup;
if (virConfGetValueBool(conf, "set_process_name", &cfg->setProcessName) < 0)
goto cleanup;
if (virConfGetValueUInt(conf, "max_processes", &cfg->maxProcesses) < 0)
goto cleanup;
if (virConfGetValueUInt(conf, "max_files", &cfg->maxFiles) < 0)
goto cleanup;
if (virConfGetValueType(conf, "max_core") == VIR_CONF_STRING) {
if (virConfGetValueString(conf, "max_core", &corestr) < 0)
goto cleanup;
if (STREQ(corestr, "unlimited")) {
cfg->maxCore = ULLONG_MAX;
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Unknown core size '%s'"),
corestr);
goto cleanup;
}
} else if (virConfGetValueULLong(conf, "max_core", &cfg->maxCore) < 0) {
goto cleanup;
}
if (virConfGetValueBool(conf, "dump_guest_core", &cfg->dumpGuestCore) < 0)
goto cleanup;
if (virConfGetValueString(conf, "lock_manager", &cfg->lockManagerName) < 0)
goto cleanup;
if (virConfGetValueString(conf, "stdio_handler", &stdioHandler) < 0)
goto cleanup;
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);
}
if (virConfGetValueUInt(conf, "max_queued", &cfg->maxQueuedJobs) < 0)
goto cleanup;
if (virConfGetValueInt(conf, "keepalive_interval", &cfg->keepAliveInterval) < 0)
goto cleanup;
if (virConfGetValueUInt(conf, "keepalive_count", &cfg->keepAliveCount) < 0)
goto cleanup;
if (virConfGetValueInt(conf, "seccomp_sandbox", &cfg->seccompSandbox) < 0)
goto cleanup;
if (virConfGetValueString(conf, "migration_host", &cfg->migrateHost) < 0)
goto cleanup;
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;
}
if (virConfGetValueString(conf, "migration_address", &cfg->migrationAddress) < 0)
goto cleanup;
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;
}
if (virConfGetValueBool(conf, "log_timestamp", &cfg->logTimestamp) < 0)
goto cleanup;
if (virConfGetValueStringList(conf, "nvram", false, &nvram) < 0)
goto cleanup;
if (nvram) {
virFirmwareFreeList(cfg->firmwares, cfg->nfirmwares);
cfg->nfirmwares = virStringListLength((const char *const *)nvram);
if (nvram[0] && VIR_ALLOC_N(cfg->firmwares, cfg->nfirmwares) < 0)
goto cleanup;
for (i = 0; nvram[i] != NULL; i++) {
if (VIR_ALLOC(cfg->firmwares[i]) < 0)
goto cleanup;
if (virFirmwareParse(nvram[i], cfg->firmwares[i]) < 0)
goto cleanup;
}
}
if (virConfGetValueUInt(conf, "gluster_debug_level", &cfg->glusterDebugLevel) < 0)
goto cleanup;
if (virConfGetValueStringList(conf, "namespaces", false, &namespaces) < 0)
goto cleanup;
if (namespaces) {
virBitmapClearAll(cfg->namespaces);
for (i = 0; namespaces[i]; i++) {
int ns = qemuDomainNamespaceTypeFromString(namespaces[i]);
if (ns < 0) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("Unknown namespace: %s"),
namespaces[i]);
goto cleanup;
}
if (!privileged) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("cannot use namespaces in session mode"));
goto cleanup;
}
if (!qemuDomainNamespaceAvailable(ns)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("%s namespace is not available"),
namespaces[i]);
goto cleanup;
}
if (virBitmapSetBit(cfg->namespaces, ns) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to enable namespace: %s"),
namespaces[i]);
goto cleanup;
}
}
}
if (virConfGetValueString(conf, "memory_backing_dir", &cfg->memoryBackingDir) < 0)
goto cleanup;
if (virConfGetValueUInt(conf, "rx_queue_size", &cfg->rx_queue_size) < 0 ||
virConfGetValueUInt(conf, "tx_queue_size", &cfg->tx_queue_size) < 0)
goto cleanup;
ret = 0;
cleanup:
virStringListFree(namespaces);
virStringListFree(controllers);
virStringListFree(hugetlbfs);
virStringListFree(nvram);
VIR_FREE(corestr);
VIR_FREE(user);
VIR_FREE(group);
virConfFree(conf);
return ret;
}
/**
* @cfg: Recently read config values
*
* Validate the recently read configuration values.
*
* Returns 0 on success, -1 on failure
*/
int
virQEMUDriverConfigValidate(virQEMUDriverConfigPtr cfg)
{
/* If the default entry was uncommented, then validate existence */
if (cfg->checkdefaultTLSx509certdir) {
if (!virFileExists(cfg->defaultTLSx509certdir)) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("default_tls_x509_cert_dir directory '%s' "
"does not exist"),
cfg->defaultTLSx509certdir);
return -1;
}
}
/* For each of the others - if the value is not to the default default
* then check if the directory exists (this may duplicate the check done
* during virQEMUDriverConfigNew).
*/
if (STRNEQ(cfg->vncTLSx509certdir, SYSCONFDIR "/pki/qemu") &&
!virFileExists(cfg->vncTLSx509certdir)) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("vnc_tls_x509_cert_dir directory '%s' does not exist"),
cfg->vncTLSx509certdir);
return -1;
}
if (STRNEQ(cfg->spiceTLSx509certdir, SYSCONFDIR "/pki/qemu") &&
!virFileExists(cfg->spiceTLSx509certdir)) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("spice_tls_x509_cert_dir directory '%s' does not exist"),
cfg->spiceTLSx509certdir);
return -1;
}
if (STRNEQ(cfg->chardevTLSx509certdir, SYSCONFDIR "/pki/qemu") &&
!virFileExists(cfg->chardevTLSx509certdir)) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("chardev_tls_x509_cert_dir directory '%s' does not exist"),
cfg->chardevTLSx509certdir);
return -1;
}
if (STRNEQ(cfg->migrateTLSx509certdir, SYSCONFDIR "/pki/qemu") &&
!virFileExists(cfg->migrateTLSx509certdir)) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("migrate_tls_x509_cert_dir directory '%s' does not exist"),
cfg->migrateTLSx509certdir);
return -1;
}
if (STRNEQ(cfg->vxhsTLSx509certdir, SYSCONFDIR "/pki/qemu") &&
!virFileExists(cfg->vxhsTLSx509certdir)) {
virReportError(VIR_ERR_CONF_SYNTAX,
_("vxhs_tls_x509_cert_dir directory '%s' does not exist"),
cfg->vxhsTLSx509certdir);
return -1;
}
return 0;
}
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,
&virQEMUDriverDomainABIStability,
&virQEMUDriverDomainSaveCookie);
}
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 = qemuSecurityGetNested(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 = qemuSecurityGetDOI(sec_managers[i]);
model = qemuSecurityGetModel(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 = qemuSecurityGetBaseLabel(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) < 0)
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 (virStorageSourceIsEmpty(disk->src) ||
!disk->src->shared ||
!virStorageSourceIsBlockLocal(disk->src))
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 &&
(virHostdevIsSCSIDevice(hostdev) &&
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 (virStorageSourceIsEmpty(disk->src) ||
!disk->src->shared ||
!virStorageSourceIsBlockLocal(disk->src))
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 ||
!virStorageSourceIsBlockLocal(disk->src))
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 *
qemuGetBaseHugepagePath(virHugeTLBFSPtr hugepage)
{
char *ret;
if (virAsprintf(&ret, "%s/libvirt/qemu", hugepage->mnt_dir) < 0)
return NULL;
return ret;
}
char *
qemuGetDomainHugepagePath(const virDomainDef *def,
virHugeTLBFSPtr hugepage)
{
char *base = qemuGetBaseHugepagePath(hugepage);
char *domPath = virDomainDefGetShortName(def);
char *ret = NULL;
if (base && domPath)
ignore_value(virAsprintf(&ret, "%s/%s", base, domPath));
VIR_FREE(domPath);
VIR_FREE(base);
return ret;
}
/**
* qemuGetDomainDefaultHugepath:
* @def: domain definition
* @hugetlbfs: array of configured hugepages
* @nhugetlbfs: number of item in the array
*
* Callers must ensure that @hugetlbfs contains at least one entry.
*
* Returns 0 on success, -1 otherwise.
* */
char *
qemuGetDomainDefaultHugepath(const virDomainDef *def,
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 qemuGetDomainHugepagePath(def, &hugetlbfs[i]);
}
/**
* qemuGetDomainHupageMemPath: Construct HP enabled memory backend path
*
* If no specific hugepage size is requested (@pagesize is zero)
* the default hugepage size is used).
* The resulting path is stored at @memPath.
*
* Returns 0 on success,
* -1 otherwise.
*/
int
qemuGetDomainHupageMemPath(const virDomainDef *def,
virQEMUDriverConfigPtr cfg,
unsigned long long pagesize,
char **memPath)
{
size_t i = 0;
if (!cfg->nhugetlbfs) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("hugetlbfs filesystem is not mounted "
"or disabled by administrator config"));
return -1;
}
if (!pagesize) {
if (!(*memPath = qemuGetDomainDefaultHugepath(def,
cfg->hugetlbfs,
cfg->nhugetlbfs)))
return -1;
} else {
for (i = 0; i < cfg->nhugetlbfs; i++) {
if (cfg->hugetlbfs[i].size == pagesize)
break;
}
if (i == cfg->nhugetlbfs) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to find any usable hugetlbfs "
"mount for %llu KiB"),
pagesize);
return -1;
}
if (!(*memPath = qemuGetDomainHugepagePath(def, &cfg->hugetlbfs[i])))
return -1;
}
return 0;
}
int
qemuGetMemoryBackingBasePath(virQEMUDriverConfigPtr cfg,
char **path)
{
return virAsprintf(path, "%s/libvirt/qemu", cfg->memoryBackingDir);
}
int
qemuGetMemoryBackingDomainPath(const virDomainDef *def,
virQEMUDriverConfigPtr cfg,
char **path)
{
char *shortName = NULL;
char *base = NULL;
int ret = -1;
if (!(shortName = virDomainDefGetShortName(def)) ||
qemuGetMemoryBackingBasePath(cfg, &base) < 0 ||
virAsprintf(path, "%s/%s", base, shortName) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(base);
VIR_FREE(shortName);
return ret;
}
/**
* qemuGetMemoryBackingPath:
* @def: domain definition
* @cfg: the driver config
* @alias: memory object alias
* @memPath: constructed path
*
* Constructs path to memory backing dir and stores it at @memPath.
*
* Returns: 0 on success,
* -1 otherwise (with error reported).
*/
int
qemuGetMemoryBackingPath(const virDomainDef *def,
virQEMUDriverConfigPtr cfg,
const char *alias,
char **memPath)
{
char *domainPath = NULL;
int ret = -1;
if (!alias) {
/* This should never happen (TM) */
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("memory device alias is not assigned"));
goto cleanup;
}
if (qemuGetMemoryBackingDomainPath(def, cfg, &domainPath) < 0 ||
virAsprintf(memPath, "%s/%s", domainPath, alias) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(domainPath);
return ret;
}
Reference in New Issue View Git Blame Copy Permalink