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libvirt/src/conf/storage_conf.c
Daniel P. Berrangé bb8ccb050d conf: add control over COW for storage pool directories 
The storage pool code now attempts to disable COW by default on btrfs,
but management applications may wish to override this behaviour. Thus we
introduce a concept of storage pool features:

  <features>
    <cow state='yes|no'/>
  </features>

If the <cow> feature policy is set, it will be enforced. It will always
return an hard error if COW cannot be explicitly set or unset.

Reviewed-by: Neal Gompa <ngompa13@gmail.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2020-07-23 16:18:09 +01:00

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/*
* storage_conf.c: config handling for storage driver
*
* Copyright (C) 2006-2016 Red Hat, Inc.
* Copyright (C) 2006-2008 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include "virerror.h"
#include "datatypes.h"
#include "node_device_conf.h"
#include "storage_adapter_conf.h"
#include "storage_conf.h"
#include "virstoragefile.h"
#include "virxml.h"
#include "viruuid.h"
#include "virbuffer.h"
#include "viralloc.h"
#include "virfile.h"
#include "virscsihost.h"
#include "virstring.h"
#include "virlog.h"
#include "virvhba.h"
#include "virutil.h"
#define VIR_FROM_THIS VIR_FROM_STORAGE
VIR_LOG_INIT("conf.storage_conf");
VIR_ENUM_IMPL(virStorageVol,
VIR_STORAGE_VOL_LAST,
"file", "block", "dir", "network",
"netdir", "ploop",
);
VIR_ENUM_IMPL(virStoragePool,
VIR_STORAGE_POOL_LAST,
"dir", "fs", "netfs",
"logical", "disk", "iscsi",
"iscsi-direct", "scsi", "mpath",
"rbd", "sheepdog", "gluster",
"zfs", "vstorage",
);
VIR_ENUM_IMPL(virStoragePoolFormatFileSystem,
VIR_STORAGE_POOL_FS_LAST,
"auto", "ext2", "ext3",
"ext4", "ufs", "iso9660", "udf",
"gfs", "gfs2", "vfat", "hfs+", "xfs", "ocfs2",
"vmfs",
);
VIR_ENUM_IMPL(virStoragePoolFormatFileSystemNet,
VIR_STORAGE_POOL_NETFS_LAST,
"auto", "nfs", "glusterfs", "cifs",
);
VIR_ENUM_IMPL(virStoragePoolFormatDisk,
VIR_STORAGE_POOL_DISK_LAST,
"unknown", "dos", "dvh", "gpt",
"mac", "bsd", "pc98", "sun", "lvm2",
);
VIR_ENUM_IMPL(virStoragePoolFormatLogical,
VIR_STORAGE_POOL_LOGICAL_LAST,
"unknown", "lvm2",
);
VIR_ENUM_IMPL(virStorageVolFormatDisk,
VIR_STORAGE_VOL_DISK_LAST,
"none", "linux", "fat16",
"fat32", "linux-swap",
"linux-lvm", "linux-raid",
"extended",
);
VIR_ENUM_IMPL(virStorageVolDefRefreshAllocation,
VIR_STORAGE_VOL_DEF_REFRESH_ALLOCATION_LAST,
"default", "capacity",
);
VIR_ENUM_IMPL(virStoragePartedFs,
VIR_STORAGE_PARTED_FS_TYPE_LAST,
"ext2", "ext2", "fat16",
"fat32", "linux-swap",
"ext2", "ext2",
"extended",
);
typedef const char *(*virStorageVolFormatToString)(int format);
typedef int (*virStorageVolFormatFromString)(const char *format);
typedef const char *(*virStoragePoolFormatToString)(int format);
typedef int (*virStoragePoolFormatFromString)(const char *format);
typedef struct _virStorageVolOptions virStorageVolOptions;
typedef virStorageVolOptions *virStorageVolOptionsPtr;
struct _virStorageVolOptions {
int defaultFormat;
int lastFormat;
virStorageVolFormatToString formatToString;
virStorageVolFormatFromString formatFromString;
};
/* Flags to indicate mandatory components in the pool source */
enum {
VIR_STORAGE_POOL_SOURCE_HOST = (1 << 0),
VIR_STORAGE_POOL_SOURCE_DEVICE = (1 << 1),
VIR_STORAGE_POOL_SOURCE_DIR = (1 << 2),
VIR_STORAGE_POOL_SOURCE_ADAPTER = (1 << 3),
VIR_STORAGE_POOL_SOURCE_NAME = (1 << 4),
VIR_STORAGE_POOL_SOURCE_INITIATOR_IQN = (1 << 5),
VIR_STORAGE_POOL_SOURCE_NETWORK = (1 << 6),
};
typedef struct _virStoragePoolOptions virStoragePoolOptions;
typedef virStoragePoolOptions *virStoragePoolOptionsPtr;
struct _virStoragePoolOptions {
unsigned int flags;
int defaultFormat;
int lastFormat;
virXMLNamespace ns;
virStoragePoolFormatToString formatToString;
virStoragePoolFormatFromString formatFromString;
};
typedef struct _virStoragePoolTypeInfo virStoragePoolTypeInfo;
typedef virStoragePoolTypeInfo *virStoragePoolTypeInfoPtr;
struct _virStoragePoolTypeInfo {
int poolType;
virStoragePoolOptions poolOptions;
virStorageVolOptions volOptions;
};
static int
virStorageVolumeFormatFromString(const char *format)
{
int ret = virStorageFileFormatTypeFromString(format);
if (ret == VIR_STORAGE_FILE_NONE)
return -1;
return ret;
}
static virStoragePoolTypeInfo poolTypeInfo[] = {
{.poolType = VIR_STORAGE_POOL_LOGICAL,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_NAME |
VIR_STORAGE_POOL_SOURCE_DEVICE),
.defaultFormat = VIR_STORAGE_POOL_LOGICAL_LVM2,
.lastFormat = VIR_STORAGE_POOL_LOGICAL_LAST,
.formatFromString = virStoragePoolFormatLogicalTypeFromString,
.formatToString = virStoragePoolFormatLogicalTypeToString,
},
},
{.poolType = VIR_STORAGE_POOL_DIR,
.volOptions = {
.defaultFormat = VIR_STORAGE_FILE_RAW,
.lastFormat = VIR_STORAGE_FILE_LAST,
.formatFromString = virStorageVolumeFormatFromString,
.formatToString = virStorageFileFormatTypeToString,
},
},
{.poolType = VIR_STORAGE_POOL_FS,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_DEVICE),
.defaultFormat = VIR_STORAGE_POOL_FS_AUTO,
.lastFormat = VIR_STORAGE_POOL_FS_LAST,
.formatFromString = virStoragePoolFormatFileSystemTypeFromString,
.formatToString = virStoragePoolFormatFileSystemTypeToString,
},
.volOptions = {
.defaultFormat = VIR_STORAGE_FILE_RAW,
.lastFormat = VIR_STORAGE_FILE_LAST,
.formatFromString = virStorageVolumeFormatFromString,
.formatToString = virStorageFileFormatTypeToString,
},
},
{.poolType = VIR_STORAGE_POOL_NETFS,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_HOST |
VIR_STORAGE_POOL_SOURCE_DIR),
.defaultFormat = VIR_STORAGE_POOL_NETFS_AUTO,
.lastFormat = VIR_STORAGE_POOL_NETFS_LAST,
.formatFromString = virStoragePoolFormatFileSystemNetTypeFromString,
.formatToString = virStoragePoolFormatFileSystemNetTypeToString,
},
.volOptions = {
.defaultFormat = VIR_STORAGE_FILE_RAW,
.lastFormat = VIR_STORAGE_FILE_LAST,
.formatFromString = virStorageVolumeFormatFromString,
.formatToString = virStorageFileFormatTypeToString,
},
},
{.poolType = VIR_STORAGE_POOL_ISCSI,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_HOST |
VIR_STORAGE_POOL_SOURCE_DEVICE |
VIR_STORAGE_POOL_SOURCE_INITIATOR_IQN),
},
},
{.poolType = VIR_STORAGE_POOL_ISCSI_DIRECT,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_HOST |
VIR_STORAGE_POOL_SOURCE_DEVICE |
VIR_STORAGE_POOL_SOURCE_NETWORK |
VIR_STORAGE_POOL_SOURCE_INITIATOR_IQN),
},
},
{.poolType = VIR_STORAGE_POOL_SCSI,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_ADAPTER),
},
},
{.poolType = VIR_STORAGE_POOL_RBD,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_HOST |
VIR_STORAGE_POOL_SOURCE_NETWORK |
VIR_STORAGE_POOL_SOURCE_NAME),
},
.volOptions = {
.defaultFormat = VIR_STORAGE_FILE_RAW,
.formatFromString = virStorageVolumeFormatFromString,
.formatToString = virStorageFileFormatTypeToString,
}
},
{.poolType = VIR_STORAGE_POOL_SHEEPDOG,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_HOST |
VIR_STORAGE_POOL_SOURCE_NETWORK |
VIR_STORAGE_POOL_SOURCE_NAME),
},
},
{.poolType = VIR_STORAGE_POOL_GLUSTER,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_HOST |
VIR_STORAGE_POOL_SOURCE_NETWORK |
VIR_STORAGE_POOL_SOURCE_NAME |
VIR_STORAGE_POOL_SOURCE_DIR),
},
.volOptions = {
.defaultFormat = VIR_STORAGE_FILE_RAW,
.lastFormat = VIR_STORAGE_FILE_LAST,
.formatToString = virStorageFileFormatTypeToString,
.formatFromString = virStorageVolumeFormatFromString,
}
},
{.poolType = VIR_STORAGE_POOL_MPATH,
},
{.poolType = VIR_STORAGE_POOL_DISK,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_DEVICE),
.defaultFormat = VIR_STORAGE_POOL_DISK_UNKNOWN,
.lastFormat = VIR_STORAGE_POOL_DISK_LAST,
.formatFromString = virStoragePoolFormatDiskTypeFromString,
.formatToString = virStoragePoolFormatDiskTypeToString,
},
.volOptions = {
.defaultFormat = VIR_STORAGE_VOL_DISK_NONE,
.lastFormat = VIR_STORAGE_VOL_DISK_LAST,
.formatFromString = virStorageVolFormatDiskTypeFromString,
.formatToString = virStorageVolFormatDiskTypeToString,
},
},
{.poolType = VIR_STORAGE_POOL_ZFS,
.poolOptions = {
.flags = (VIR_STORAGE_POOL_SOURCE_NAME |
VIR_STORAGE_POOL_SOURCE_DEVICE),
},
},
{.poolType = VIR_STORAGE_POOL_VSTORAGE,
.poolOptions = {
.flags = VIR_STORAGE_POOL_SOURCE_NAME,
},
.volOptions = {
.defaultFormat = VIR_STORAGE_FILE_RAW,
.lastFormat = VIR_STORAGE_FILE_LAST,
.formatFromString = virStorageVolumeFormatFromString,
.formatToString = virStorageFileFormatTypeToString,
},
},
};
static virStoragePoolTypeInfoPtr
virStoragePoolTypeInfoLookup(int type)
{
size_t i;
for (i = 0; i < G_N_ELEMENTS(poolTypeInfo); i++)
if (poolTypeInfo[i].poolType == type)
return &poolTypeInfo[i];
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing backend for pool type %d"), type);
return NULL;
}
static virStoragePoolOptionsPtr
virStoragePoolOptionsForPoolType(int type)
{
virStoragePoolTypeInfoPtr backend = virStoragePoolTypeInfoLookup(type);
if (backend == NULL)
return NULL;
return &backend->poolOptions;
}
/* virStoragePoolOptionsPoolTypeSetXMLNamespace:
* @type: virStoragePoolType
* @ns: xmlopt namespace pointer
*
* Store the @ns in the pool options for the particular backend.
* This allows the parse/format code to then directly call the Namespace
* method space (parse, format, href, free) as needed during processing.
*
* Returns: 0 on success, -1 on failure.
*/
int
virStoragePoolOptionsPoolTypeSetXMLNamespace(int type,
virXMLNamespacePtr ns)
{
virStoragePoolTypeInfoPtr backend = virStoragePoolTypeInfoLookup(type);
if (!backend)
return -1;
backend->poolOptions.ns = *ns;
return 0;
}
static virStorageVolOptionsPtr
virStorageVolOptionsForPoolType(int type)
{
virStoragePoolTypeInfoPtr backend = virStoragePoolTypeInfoLookup(type);
if (backend == NULL)
return NULL;
return &backend->volOptions;
}
int
virStoragePoolOptionsFormatPool(virBufferPtr buf,
int type)
{
virStoragePoolOptionsPtr poolOptions;
if (!(poolOptions = virStoragePoolOptionsForPoolType(type)))
return -1;
if (!poolOptions->formatToString)
return 0;
virBufferAddLit(buf, "<poolOptions>\n");
virBufferAdjustIndent(buf, 2);
if (poolOptions->formatToString) {
size_t i;
virBufferAsprintf(buf, "<defaultFormat type='%s'/>\n",
(poolOptions->formatToString)(poolOptions->defaultFormat));
virBufferAddLit(buf, "<enum name='sourceFormatType'>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < poolOptions->lastFormat; i++)
virBufferAsprintf(buf, "<value>%s</value>\n",
(poolOptions->formatToString)(i));
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</enum>\n");
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</poolOptions>\n");
return 0;
}
int
virStoragePoolOptionsFormatVolume(virBufferPtr buf,
int type)
{
size_t i;
virStorageVolOptionsPtr volOptions;
if (!(volOptions = virStorageVolOptionsForPoolType(type)))
return -1;
if (!volOptions->formatToString)
return 0;
virBufferAddLit(buf, "<volOptions>\n");
virBufferAdjustIndent(buf, 2);
virBufferAsprintf(buf, "<defaultFormat type='%s'/>\n",
(volOptions->formatToString)(volOptions->defaultFormat));
virBufferAddLit(buf, "<enum name='targetFormatType'>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < volOptions->lastFormat; i++)
virBufferAsprintf(buf, "<value>%s</value>\n",
(volOptions->formatToString)(i));
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</enum>\n");
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</volOptions>\n");
return 0;
}
void
virStorageVolDefFree(virStorageVolDefPtr def)
{
size_t i;
if (!def)
return;
VIR_FREE(def->name);
VIR_FREE(def->key);
for (i = 0; i < def->source.nextent; i++)
VIR_FREE(def->source.extents[i].path);
VIR_FREE(def->source.extents);
virStorageSourceClear(&def->target);
VIR_FREE(def);
}
void
virStoragePoolSourceDeviceClear(virStoragePoolSourceDevicePtr dev)
{
VIR_FREE(dev->freeExtents);
VIR_FREE(dev->path);
}
void
virStoragePoolSourceClear(virStoragePoolSourcePtr source)
{
size_t i;
if (!source)
return;
for (i = 0; i < source->nhost; i++)
VIR_FREE(source->hosts[i].name);
VIR_FREE(source->hosts);
for (i = 0; i < source->ndevice; i++)
virStoragePoolSourceDeviceClear(&source->devices[i]);
VIR_FREE(source->devices);
VIR_FREE(source->dir);
VIR_FREE(source->name);
virStorageAdapterClear(&source->adapter);
virStorageSourceInitiatorClear(&source->initiator);
virStorageAuthDefFree(source->auth);
VIR_FREE(source->vendor);
VIR_FREE(source->product);
}
void
virStoragePoolSourceFree(virStoragePoolSourcePtr source)
{
virStoragePoolSourceClear(source);
VIR_FREE(source);
}
void
virStoragePoolDefFree(virStoragePoolDefPtr def)
{
if (!def)
return;
VIR_FREE(def->name);
virStoragePoolSourceClear(&def->source);
VIR_FREE(def->target.path);
VIR_FREE(def->target.perms.label);
VIR_FREE(def->refresh);
if (def->namespaceData && def->ns.free)
(def->ns.free)(def->namespaceData);
VIR_FREE(def);
}
static int
virStoragePoolDefParseSource(xmlXPathContextPtr ctxt,
virStoragePoolSourcePtr source,
int pool_type,
xmlNodePtr node)
{
int ret = -1;
xmlNodePtr relnode, authnode;
xmlNodePtr adapternode;
int nsource;
size_t i;
virStoragePoolOptionsPtr options;
int n;
g_autoptr(virStorageAuthDef) authdef = NULL;
g_autofree char *port = NULL;
g_autofree char *ver = NULL;
g_autofree xmlNodePtr *nodeset = NULL;
g_autofree char *sourcedir = NULL;
relnode = ctxt->node;
ctxt->node = node;
if ((options = virStoragePoolOptionsForPoolType(pool_type)) == NULL)
goto cleanup;
source->name = virXPathString("string(./name)", ctxt);
if (pool_type == VIR_STORAGE_POOL_RBD && source->name == NULL) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("element 'name' is mandatory for RBD pool"));
goto cleanup;
}
if (options->formatFromString) {
g_autofree char *format = NULL;
format = virXPathString("string(./format/@type)", ctxt);
if (format == NULL)
source->format = options->defaultFormat;
else
source->format = options->formatFromString(format);
if (source->format < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown pool format type %s"), format);
goto cleanup;
}
}
if ((n = virXPathNodeSet("./host", ctxt, &nodeset)) < 0)
goto cleanup;
if (n) {
if (VIR_ALLOC_N(source->hosts, n) < 0)
goto cleanup;
source->nhost = n;
for (i = 0; i < source->nhost; i++) {
source->hosts[i].name = virXMLPropString(nodeset[i], "name");
if (!source->hosts[i].name) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing storage pool host name"));
goto cleanup;
}
port = virXMLPropString(nodeset[i], "port");
if (port) {
if (virStrToLong_i(port, NULL, 10, &source->hosts[i].port) < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("Invalid port number: %s"),
port);
goto cleanup;
}
}
VIR_FREE(port);
}
}
VIR_FREE(nodeset);
virStorageSourceInitiatorParseXML(ctxt, &source->initiator);
nsource = virXPathNodeSet("./device", ctxt, &nodeset);
if (nsource < 0)
goto cleanup;
for (i = 0; i < nsource; i++) {
g_autofree char *partsep = NULL;
virStoragePoolSourceDevice dev = { .path = NULL };
dev.path = virXMLPropString(nodeset[i], "path");
if (dev.path == NULL) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing storage pool source device path"));
goto cleanup;
}
partsep = virXMLPropString(nodeset[i], "part_separator");
if (partsep) {
dev.part_separator = virTristateBoolTypeFromString(partsep);
if (dev.part_separator <= 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("invalid part_separator setting '%s'"),
partsep);
virStoragePoolSourceDeviceClear(&dev);
goto cleanup;
}
}
if (VIR_APPEND_ELEMENT(source->devices, source->ndevice, dev) < 0) {
virStoragePoolSourceDeviceClear(&dev);
goto cleanup;
}
}
sourcedir = virXPathString("string(./dir/@path)", ctxt);
if (sourcedir)
source->dir = virFileSanitizePath(sourcedir);
/* In gluster, a missing dir defaults to "/" */
if (!source->dir && pool_type == VIR_STORAGE_POOL_GLUSTER)
source->dir = g_strdup("/");
if ((adapternode = virXPathNode("./adapter", ctxt))) {
if (virStorageAdapterParseXML(&source->adapter, adapternode, ctxt) < 0)
goto cleanup;
}
if ((authnode = virXPathNode("./auth", ctxt))) {
if (!(authdef = virStorageAuthDefParse(authnode, ctxt)))
goto cleanup;
if (authdef->authType == VIR_STORAGE_AUTH_TYPE_NONE) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("storage pool missing auth type"));
goto cleanup;
}
source->auth = g_steal_pointer(&authdef);
}
/* Option protocol version string (NFSvN) */
if ((ver = virXPathString("string(./protocol/@ver)", ctxt))) {
if ((source->format != VIR_STORAGE_POOL_NETFS_NFS) &&
(source->format != VIR_STORAGE_POOL_NETFS_AUTO)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("storage pool protocol ver unsupported for "
"pool type '%s'"),
virStoragePoolFormatFileSystemNetTypeToString(source->format));
goto cleanup;
}
if (virStrToLong_uip(ver, NULL, 0, &source->protocolVer) < 0) {
virReportError(VIR_ERR_XML_ERROR,
_("storage pool protocol ver '%s' is malformed"),
ver);
goto cleanup;
}
}
source->vendor = virXPathString("string(./vendor/@name)", ctxt);
source->product = virXPathString("string(./product/@name)", ctxt);
ret = 0;
cleanup:
ctxt->node = relnode;
return ret;
}
virStoragePoolSourcePtr
virStoragePoolDefParseSourceString(const char *srcSpec,
int pool_type)
{
g_autoptr(xmlDoc) doc = NULL;
xmlNodePtr node = NULL;
g_autoptr(xmlXPathContext) xpath_ctxt = NULL;
g_autoptr(virStoragePoolSource) def = NULL;
if (!(doc = virXMLParseStringCtxt(srcSpec,
_("(storage_source_specification)"),
&xpath_ctxt)))
return NULL;
if (VIR_ALLOC(def) < 0)
return NULL;
if (!(node = virXPathNode("/source", xpath_ctxt))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("root element was not source"));
return NULL;
}
if (virStoragePoolDefParseSource(xpath_ctxt, def, pool_type,
node) < 0)
return NULL;
return g_steal_pointer(&def);
}
static int
virStorageDefParsePerms(xmlXPathContextPtr ctxt,
virStoragePermsPtr perms,
const char *permxpath)
{
long long val;
int ret = -1;
VIR_XPATH_NODE_AUTORESTORE(ctxt);
xmlNodePtr node;
g_autofree char *mode = NULL;
node = virXPathNode(permxpath, ctxt);
if (node == NULL) {
/* Set default values if there is not <permissions> element */
perms->mode = (mode_t) -1;
perms->uid = (uid_t) -1;
perms->gid = (gid_t) -1;
perms->label = NULL;
return 0;
}
ctxt->node = node;
if ((mode = virXPathString("string(./mode)", ctxt))) {
int tmp;
if (virStrToLong_i(mode, NULL, 8, &tmp) < 0 || (tmp & ~0777)) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("malformed octal mode"));
goto error;
}
perms->mode = tmp;
} else {
perms->mode = (mode_t) -1;
}
if (virXPathNode("./owner", ctxt) == NULL) {
perms->uid = (uid_t) -1;
} else {
/* We previously could output -1, so continue to parse it */
if (virXPathLongLong("number(./owner)", ctxt, &val) < 0 ||
((uid_t)val != val &&
val != -1)) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("malformed owner element"));
goto error;
}
perms->uid = val;
}
if (virXPathNode("./group", ctxt) == NULL) {
perms->gid = (gid_t) -1;
} else {
/* We previously could output -1, so continue to parse it */
if (virXPathLongLong("number(./group)", ctxt, &val) < 0 ||
((gid_t) val != val &&
val != -1)) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("malformed group element"));
goto error;
}
perms->gid = val;
}
/* NB, we're ignoring missing labels here - they'll simply inherit */
perms->label = virXPathString("string(./label)", ctxt);
ret = 0;
error:
return ret;
}
static int
virStoragePoolDefRefreshParse(xmlXPathContextPtr ctxt,
virStoragePoolDefPtr def)
{
g_autofree virStoragePoolDefRefreshPtr refresh = NULL;
g_autofree char *allocation = NULL;
int tmp;
allocation = virXPathString("string(./refresh/volume/@allocation)", ctxt);
if (!allocation)
return 0;
if ((tmp = virStorageVolDefRefreshAllocationTypeFromString(allocation)) < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown storage pool volume refresh allocation type %s"),
allocation);
return -1;
}
if (VIR_ALLOC(refresh) < 0)
return -1;
refresh->volume.allocation = tmp;
def->refresh = g_steal_pointer(&refresh);
return 0;
}
static void
virStoragePoolDefRefreshFormat(virBufferPtr buf,
virStoragePoolDefRefreshPtr refresh)
{
if (!refresh)
return;
virBufferAddLit(buf, "<refresh>\n");
virBufferAdjustIndent(buf, 2);
virBufferAsprintf(buf, "<volume allocation='%s'/>\n",
virStorageVolDefRefreshAllocationTypeToString(refresh->volume.allocation));
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</refresh>\n");
}
static int
virStoragePoolDefParseFeatures(virStoragePoolDefPtr def,
xmlXPathContextPtr ctxt)
{
g_autofree char *cow = virXPathString("string(./features/cow/@state)", ctxt);
if (cow) {
int val;
if (def->type != VIR_STORAGE_POOL_FS &&
def->type != VIR_STORAGE_POOL_DIR) {
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("cow feature may only be used for 'fs' and 'dir' pools"));
return -1;
}
if ((val = virTristateBoolTypeFromString(cow)) <= 0) {
virReportError(VIR_ERR_XML_ERROR,
_("invalid storage pool cow feature state '%s'"),
cow);
return -1;
}
def->features.cow = val;
}
return 0;
}
virStoragePoolDefPtr
virStoragePoolDefParseXML(xmlXPathContextPtr ctxt)
{
virStoragePoolOptionsPtr options;
xmlNodePtr source_node;
g_autoptr(virStoragePoolDef) def = NULL;
g_autofree char *type = NULL;
g_autofree char *uuid = NULL;
g_autofree char *target_path = NULL;
if (VIR_ALLOC(def) < 0)
return NULL;
type = virXPathString("string(./@type)", ctxt);
if (type == NULL) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("storage pool missing type attribute"));
return NULL;
}
if ((def->type = virStoragePoolTypeFromString(type)) < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown storage pool type %s"), type);
return NULL;
}
if ((options = virStoragePoolOptionsForPoolType(def->type)) == NULL)
return NULL;
source_node = virXPathNode("./source", ctxt);
if (source_node) {
if (virStoragePoolDefParseSource(ctxt, &def->source, def->type,
source_node) < 0)
return NULL;
} else {
if (options->formatFromString)
def->source.format = options->defaultFormat;
}
def->name = virXPathString("string(./name)", ctxt);
if (def->name == NULL &&
options->flags & VIR_STORAGE_POOL_SOURCE_NAME)
def->name = g_strdup(def->source.name);
if (def->name == NULL) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing pool source name element"));
return NULL;
}
if (strchr(def->name, '/')) {
virReportError(VIR_ERR_XML_ERROR,
_("name %s cannot contain '/'"), def->name);
return NULL;
}
uuid = virXPathString("string(./uuid)", ctxt);
if (uuid == NULL) {
if (virUUIDGenerate(def->uuid) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unable to generate uuid"));
return NULL;
}
} else {
if (virUUIDParse(uuid, def->uuid) < 0) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("malformed uuid element"));
return NULL;
}
}
if (virStoragePoolDefParseFeatures(def, ctxt) < 0)
return NULL;
if (options->flags & VIR_STORAGE_POOL_SOURCE_HOST) {
if (!def->source.nhost) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing storage pool source host name"));
return NULL;
}
}
if (options->flags & VIR_STORAGE_POOL_SOURCE_DIR) {
if (!def->source.dir) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing storage pool source path"));
return NULL;
}
}
if (options->flags & VIR_STORAGE_POOL_SOURCE_NAME) {
if (def->source.name == NULL) {
/* source name defaults to pool name */
def->source.name = g_strdup(def->name);
}
}
if ((options->flags & VIR_STORAGE_POOL_SOURCE_ADAPTER) &&
(virStorageAdapterValidate(&def->source.adapter)) < 0)
return NULL;
/* If DEVICE is the only source type, then its required */
if (options->flags == VIR_STORAGE_POOL_SOURCE_DEVICE) {
if (!def->source.ndevice) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing storage pool source device name"));
return NULL;
}
}
/* When we are working with a virtual disk we can skip the target
* path and permissions */
if (!(options->flags & VIR_STORAGE_POOL_SOURCE_NETWORK)) {
if (def->type == VIR_STORAGE_POOL_LOGICAL) {
target_path = g_strdup_printf("/dev/%s", def->source.name);
} else if (def->type == VIR_STORAGE_POOL_ZFS) {
target_path = g_strdup_printf("/dev/zvol/%s", def->source.name);
} else {
target_path = virXPathString("string(./target/path)", ctxt);
if (!target_path) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing storage pool target path"));
return NULL;
}
}
def->target.path = virFileSanitizePath(target_path);
if (!def->target.path)
return NULL;
if (virStorageDefParsePerms(ctxt, &def->target.perms,
"./target/permissions") < 0)
return NULL;
}
if (def->type == VIR_STORAGE_POOL_ISCSI_DIRECT &&
!def->source.initiator.iqn) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("missing initiator IQN"));
return NULL;
}
if (virStoragePoolDefRefreshParse(ctxt, def) < 0)
return NULL;
/* Make a copy of all the callback pointers here for easier use,
* especially during the virStoragePoolSourceClear method */
def->ns = options->ns;
if (def->ns.parse) {
if (virXMLNamespaceRegister(ctxt, &def->ns) < 0)
return NULL;
if ((def->ns.parse)(ctxt, &def->namespaceData) < 0)
return NULL;
}
return g_steal_pointer(&def);
}
virStoragePoolDefPtr
virStoragePoolDefParseNode(xmlDocPtr xml,
xmlNodePtr root)
{
g_autoptr(xmlXPathContext) ctxt = NULL;
if (!virXMLNodeNameEqual(root, "pool")) {
virReportError(VIR_ERR_XML_ERROR,
_("unexpected root element <%s>, "
"expecting <pool>"),
root->name);
return NULL;
}
if (!(ctxt = virXMLXPathContextNew(xml)))
return NULL;
ctxt->node = root;
return virStoragePoolDefParseXML(ctxt);
}
static virStoragePoolDefPtr
virStoragePoolDefParse(const char *xmlStr,
const char *filename)
{
virStoragePoolDefPtr ret = NULL;
xmlDocPtr xml;
if ((xml = virXMLParse(filename, xmlStr, _("(storage_pool_definition)")))) {
ret = virStoragePoolDefParseNode(xml, xmlDocGetRootElement(xml));
xmlFreeDoc(xml);
}
return ret;
}
virStoragePoolDefPtr
virStoragePoolDefParseString(const char *xmlStr)
{
return virStoragePoolDefParse(xmlStr, NULL);
}
virStoragePoolDefPtr
virStoragePoolDefParseFile(const char *filename)
{
return virStoragePoolDefParse(NULL, filename);
}
static int
virStoragePoolSourceFormat(virBufferPtr buf,
virStoragePoolOptionsPtr options,
virStoragePoolSourcePtr src)
{
size_t i, j;
virBufferAddLit(buf, "<source>\n");
virBufferAdjustIndent(buf, 2);
if ((options->flags & VIR_STORAGE_POOL_SOURCE_HOST) && src->nhost) {
for (i = 0; i < src->nhost; i++) {
virBufferEscapeString(buf, "<host name='%s'",
src->hosts[i].name);
if (src->hosts[i].port)
virBufferAsprintf(buf, " port='%d'", src->hosts[i].port);
virBufferAddLit(buf, "/>\n");
}
}
if ((options->flags & VIR_STORAGE_POOL_SOURCE_DEVICE) &&
src->ndevice) {
for (i = 0; i < src->ndevice; i++) {
virBufferEscapeString(buf, "<device path='%s'",
src->devices[i].path);
if (src->devices[i].part_separator !=
VIR_TRISTATE_SWITCH_ABSENT) {
virBufferAsprintf(buf, " part_separator='%s'",
virTristateBoolTypeToString(src->devices[i].part_separator));
}
if (src->devices[i].nfreeExtent) {
virBufferAddLit(buf, ">\n");
virBufferAdjustIndent(buf, 2);
for (j = 0; j < src->devices[i].nfreeExtent; j++) {
virBufferAsprintf(buf, "<freeExtent start='%llu' end='%llu'/>\n",
src->devices[i].freeExtents[j].start,
src->devices[i].freeExtents[j].end);
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</device>\n");
} else {
virBufferAddLit(buf, "/>\n");
}
}
}
if (options->flags & VIR_STORAGE_POOL_SOURCE_DIR)
virBufferEscapeString(buf, "<dir path='%s'/>\n", src->dir);
if ((options->flags & VIR_STORAGE_POOL_SOURCE_ADAPTER) &&
(src->adapter.type == VIR_STORAGE_ADAPTER_TYPE_FC_HOST ||
src->adapter.type == VIR_STORAGE_ADAPTER_TYPE_SCSI_HOST))
virStorageAdapterFormat(buf, &src->adapter);
if (options->flags & VIR_STORAGE_POOL_SOURCE_NAME)
virBufferEscapeString(buf, "<name>%s</name>\n", src->name);
if (options->flags & VIR_STORAGE_POOL_SOURCE_INITIATOR_IQN)
virStorageSourceInitiatorFormatXML(&src->initiator, buf);
if (options->formatToString) {
const char *format = (options->formatToString)(src->format);
if (!format) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown pool format number %d"),
src->format);
return -1;
}
virBufferAsprintf(buf, "<format type='%s'/>\n", format);
}
if (src->auth)
virStorageAuthDefFormat(buf, src->auth);
if (src->protocolVer)
virBufferAsprintf(buf, "<protocol ver='%u'/>\n", src->protocolVer);
virBufferEscapeString(buf, "<vendor name='%s'/>\n", src->vendor);
virBufferEscapeString(buf, "<product name='%s'/>\n", src->product);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</source>\n");
return 0;
}
static void
virStoragePoolDefFormatFeatures(virBufferPtr buf,
virStoragePoolDefPtr def)
{
if (def->features.cow == VIR_TRISTATE_BOOL_ABSENT)
return;
virBufferAddLit(buf, "<features>\n");
virBufferAdjustIndent(buf, 2);
if (def->features.cow != VIR_TRISTATE_BOOL_ABSENT)
virBufferAsprintf(buf, "<cow state='%s'/>\n",
virTristateBoolTypeToString(def->features.cow));
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</features>\n");
}
static int
virStoragePoolDefFormatBuf(virBufferPtr buf,
virStoragePoolDefPtr def)
{
virStoragePoolOptionsPtr options;
char uuid[VIR_UUID_STRING_BUFLEN];
const char *type;
options = virStoragePoolOptionsForPoolType(def->type);
if (options == NULL)
return -1;
type = virStoragePoolTypeToString(def->type);
if (!type) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected pool type"));
return -1;
}
virBufferAsprintf(buf, "<pool type='%s'", type);
if (def->namespaceData && def->ns.format)
virXMLNamespaceFormatNS(buf, &def->ns);
virBufferAddLit(buf, ">\n");
virBufferAdjustIndent(buf, 2);
virBufferEscapeString(buf, "<name>%s</name>\n", def->name);
virUUIDFormat(def->uuid, uuid);
virBufferAsprintf(buf, "<uuid>%s</uuid>\n", uuid);
virBufferAsprintf(buf, "<capacity unit='bytes'>%llu</capacity>\n",
def->capacity);
virBufferAsprintf(buf, "<allocation unit='bytes'>%llu</allocation>\n",
def->allocation);
virBufferAsprintf(buf, "<available unit='bytes'>%llu</available>\n",
def->available);
virStoragePoolDefFormatFeatures(buf, def);
if (virStoragePoolSourceFormat(buf, options, &def->source) < 0)
return -1;
/* RBD, Sheepdog, Gluster and Iscsi-direct devices are not local block devs nor
* files, so they don't have a target */
if (def->type != VIR_STORAGE_POOL_RBD &&
def->type != VIR_STORAGE_POOL_SHEEPDOG &&
def->type != VIR_STORAGE_POOL_GLUSTER &&
def->type != VIR_STORAGE_POOL_ISCSI_DIRECT) {
virBufferAddLit(buf, "<target>\n");
virBufferAdjustIndent(buf, 2);
virBufferEscapeString(buf, "<path>%s</path>\n", def->target.path);
if (def->target.perms.mode != (mode_t) -1 ||
def->target.perms.uid != (uid_t) -1 ||
def->target.perms.gid != (gid_t) -1 ||
def->target.perms.label) {
virBufferAddLit(buf, "<permissions>\n");
virBufferAdjustIndent(buf, 2);
if (def->target.perms.mode != (mode_t) -1)
virBufferAsprintf(buf, "<mode>0%o</mode>\n",
def->target.perms.mode);
if (def->target.perms.uid != (uid_t) -1)
virBufferAsprintf(buf, "<owner>%d</owner>\n",
(int) def->target.perms.uid);
if (def->target.perms.gid != (gid_t) -1)
virBufferAsprintf(buf, "<group>%d</group>\n",
(int) def->target.perms.gid);
virBufferEscapeString(buf, "<label>%s</label>\n",
def->target.perms.label);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</permissions>\n");
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</target>\n");
}
virStoragePoolDefRefreshFormat(buf, def->refresh);
if (def->namespaceData && def->ns.format) {
if ((def->ns.format)(buf, def->namespaceData) < 0)
return -1;
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</pool>\n");
return 0;
}
char *
virStoragePoolDefFormat(virStoragePoolDefPtr def)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
if (virStoragePoolDefFormatBuf(&buf, def) < 0)
return NULL;
return virBufferContentAndReset(&buf);
}
static int
virStorageSize(const char *unit,
const char *val,
unsigned long long *ret)
{
if (virStrToLong_ullp(val, NULL, 10, ret) < 0) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("malformed capacity element"));
return -1;
}
/* off_t is signed, so you cannot create a file larger than 2**63
* bytes in the first place. */
if (virScaleInteger(ret, unit, 1, LLONG_MAX) < 0)
return -1;
return 0;
}
static virStorageVolDefPtr
virStorageVolDefParseXML(virStoragePoolDefPtr pool,
xmlXPathContextPtr ctxt,
unsigned int flags)
{
virStorageVolOptionsPtr options;
xmlNodePtr node;
size_t i;
int n;
g_autoptr(virStorageVolDef) def = NULL;
g_autofree char *type = NULL;
g_autofree char *allocation = NULL;
g_autofree char *capacity = NULL;
g_autofree char *unit = NULL;
g_autofree char *backingStore = NULL;
g_autofree xmlNodePtr *nodes = NULL;
virCheckFlags(VIR_VOL_XML_PARSE_NO_CAPACITY |
VIR_VOL_XML_PARSE_OPT_CAPACITY, NULL);
options = virStorageVolOptionsForPoolType(pool->type);
if (options == NULL)
return NULL;
if (VIR_ALLOC(def) < 0)
return NULL;
def->target.type = VIR_STORAGE_TYPE_FILE;
def->name = virXPathString("string(./name)", ctxt);
if (def->name == NULL) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing volume name element"));
return NULL;
}
/* Normally generated by pool refresh, but useful for unit tests */
def->key = virXPathString("string(./key)", ctxt);
/* Technically overridden by pool refresh, but useful for unit tests */
type = virXPathString("string(./@type)", ctxt);
if (type) {
if ((def->type = virStorageVolTypeFromString(type)) < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown volume type '%s'"), type);
return NULL;
}
}
if ((backingStore = virXPathString("string(./backingStore/path)", ctxt))) {
if (!(def->target.backingStore = virStorageSourceNew()))
return NULL;
def->target.backingStore->type = VIR_STORAGE_TYPE_FILE;
def->target.backingStore->path = backingStore;
backingStore = NULL;
if (options->formatFromString) {
g_autofree char *format = NULL;
format = virXPathString("string(./backingStore/format/@type)", ctxt);
if (format == NULL)
def->target.backingStore->format = options->defaultFormat;
else
def->target.backingStore->format = (options->formatFromString)(format);
if (def->target.backingStore->format < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown volume format type %s"), format);
return NULL;
}
}
if (VIR_ALLOC(def->target.backingStore->perms) < 0)
return NULL;
if (virStorageDefParsePerms(ctxt, def->target.backingStore->perms,
"./backingStore/permissions") < 0)
return NULL;
}
capacity = virXPathString("string(./capacity)", ctxt);
unit = virXPathString("string(./capacity/@unit)", ctxt);
if (capacity) {
if (virStorageSize(unit, capacity, &def->target.capacity) < 0)
return NULL;
} else if (!(flags & VIR_VOL_XML_PARSE_NO_CAPACITY) &&
!((flags & VIR_VOL_XML_PARSE_OPT_CAPACITY) &&
virStorageSourceHasBacking(&def->target))) {
virReportError(VIR_ERR_XML_ERROR, "%s", _("missing capacity element"));
return NULL;
}
VIR_FREE(unit);
allocation = virXPathString("string(./allocation)", ctxt);
if (allocation) {
unit = virXPathString("string(./allocation/@unit)", ctxt);
if (virStorageSize(unit, allocation, &def->target.allocation) < 0)
return NULL;
def->target.has_allocation = true;
} else {
def->target.allocation = def->target.capacity;
}
def->target.path = virXPathString("string(./target/path)", ctxt);
if (options->formatFromString) {
g_autofree char *format = NULL;
format = virXPathString("string(./target/format/@type)", ctxt);
if (format == NULL)
def->target.format = options->defaultFormat;
else
def->target.format = (options->formatFromString)(format);
if (def->target.format < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown volume format type %s"), format);
return NULL;
}
}
if (VIR_ALLOC(def->target.perms) < 0)
return NULL;
if (virStorageDefParsePerms(ctxt, def->target.perms,
"./target/permissions") < 0)
return NULL;
node = virXPathNode("./target/encryption", ctxt);
if (node != NULL) {
def->target.encryption = virStorageEncryptionParseNode(node, ctxt);
if (def->target.encryption == NULL)
return NULL;
}
def->target.compat = virXPathString("string(./target/compat)", ctxt);
if (virStorageFileCheckCompat(def->target.compat) < 0)
return NULL;
if (virXPathNode("./target/nocow", ctxt))
def->target.nocow = true;
if (virXPathNode("./target/features", ctxt)) {
if ((n = virXPathNodeSet("./target/features/*", ctxt, &nodes)) < 0)
return NULL;
if (!def->target.compat)
def->target.compat = g_strdup("1.1");
if (!(def->target.features = virBitmapNew(VIR_STORAGE_FILE_FEATURE_LAST)))
return NULL;
for (i = 0; i < n; i++) {
int f = virStorageFileFeatureTypeFromString((const char*)nodes[i]->name);
if (f < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("unsupported feature %s"),
(const char*)nodes[i]->name);
return NULL;
}
ignore_value(virBitmapSetBit(def->target.features, f));
}
VIR_FREE(nodes);
}
return g_steal_pointer(&def);
}
virStorageVolDefPtr
virStorageVolDefParseNode(virStoragePoolDefPtr pool,
xmlDocPtr xml,
xmlNodePtr root,
unsigned int flags)
{
g_autoptr(xmlXPathContext) ctxt = NULL;
if (!virXMLNodeNameEqual(root, "volume")) {
virReportError(VIR_ERR_XML_ERROR,
_("unexpected root element <%s>, "
"expecting <volume>"),
root->name);
return NULL;
}
if (!(ctxt = virXMLXPathContextNew(xml)))
return NULL;
ctxt->node = root;
return virStorageVolDefParseXML(pool, ctxt, flags);
}
static virStorageVolDefPtr
virStorageVolDefParse(virStoragePoolDefPtr pool,
const char *xmlStr,
const char *filename,
unsigned int flags)
{
virStorageVolDefPtr ret = NULL;
xmlDocPtr xml;
if ((xml = virXMLParse(filename, xmlStr, _("(storage_volume_definition)")))) {
ret = virStorageVolDefParseNode(pool, xml, xmlDocGetRootElement(xml), flags);
xmlFreeDoc(xml);
}
return ret;
}
virStorageVolDefPtr
virStorageVolDefParseString(virStoragePoolDefPtr pool,
const char *xmlStr,
unsigned int flags)
{
return virStorageVolDefParse(pool, xmlStr, NULL, flags);
}
virStorageVolDefPtr
virStorageVolDefParseFile(virStoragePoolDefPtr pool,
const char *filename,
unsigned int flags)
{
return virStorageVolDefParse(pool, NULL, filename, flags);
}
static void
virStorageVolTimestampFormat(virBufferPtr buf, const char *name,
struct timespec *ts)
{
if (ts->tv_nsec < 0)
return;
virBufferAsprintf(buf, "<%s>%llu", name,
(unsigned long long) ts->tv_sec);
if (ts->tv_nsec)
virBufferAsprintf(buf, ".%09ld", ts->tv_nsec);
virBufferAsprintf(buf, "</%s>\n", name);
}
static int
virStorageVolTargetDefFormat(virStorageVolOptionsPtr options,
virBufferPtr buf,
virStorageSourcePtr def,
const char *type)
{
virBufferAsprintf(buf, "<%s>\n", type);
virBufferAdjustIndent(buf, 2);
virBufferEscapeString(buf, "<path>%s</path>\n", def->path);
if (options->formatToString) {
const char *format = (options->formatToString)(def->format);
if (!format) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown volume format number %d"),
def->format);
return -1;
}
virBufferAsprintf(buf, "<format type='%s'/>\n", format);
}
if (def->perms &&
(def->perms->mode != (mode_t) -1 ||
def->perms->uid != (uid_t) -1 ||
def->perms->gid != (gid_t) -1 ||
def->perms->label)) {
virBufferAddLit(buf, "<permissions>\n");
virBufferAdjustIndent(buf, 2);
if (def->perms->mode != (mode_t) -1)
virBufferAsprintf(buf, "<mode>0%o</mode>\n",
def->perms->mode);
if (def->perms->uid != (uid_t) -1)
virBufferAsprintf(buf, "<owner>%d</owner>\n",
(int) def->perms->uid);
if (def->perms->gid != (gid_t) -1)
virBufferAsprintf(buf, "<group>%d</group>\n",
(int) def->perms->gid);
virBufferEscapeString(buf, "<label>%s</label>\n",
def->perms->label);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</permissions>\n");
}
if (def->timestamps) {
virBufferAddLit(buf, "<timestamps>\n");
virBufferAdjustIndent(buf, 2);
virStorageVolTimestampFormat(buf, "atime", &def->timestamps->atime);
virStorageVolTimestampFormat(buf, "mtime", &def->timestamps->mtime);
virStorageVolTimestampFormat(buf, "ctime", &def->timestamps->ctime);
virStorageVolTimestampFormat(buf, "btime", &def->timestamps->btime);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</timestamps>\n");
}
if (def->encryption &&
virStorageEncryptionFormat(buf, def->encryption) < 0)
return -1;
virBufferEscapeString(buf, "<compat>%s</compat>\n", def->compat);
if (def->features) {
size_t i;
bool empty = virBitmapIsAllClear(def->features);
if (empty) {
virBufferAddLit(buf, "<features/>\n");
} else {
virBufferAddLit(buf, "<features>\n");
virBufferAdjustIndent(buf, 2);
}
for (i = 0; i < VIR_STORAGE_FILE_FEATURE_LAST; i++) {
if (virBitmapIsBitSet(def->features, i))
virBufferAsprintf(buf, "<%s/>\n",
virStorageFileFeatureTypeToString(i));
}
if (!empty) {
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</features>\n");
}
}
virBufferAdjustIndent(buf, -2);
virBufferAsprintf(buf, "</%s>\n", type);
return 0;
}
char *
virStorageVolDefFormat(virStoragePoolDefPtr pool,
virStorageVolDefPtr def)
{
virStorageVolOptionsPtr options;
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
options = virStorageVolOptionsForPoolType(pool->type);
if (options == NULL)
return NULL;
virBufferAsprintf(&buf, "<volume type='%s'>\n",
virStorageVolTypeToString(def->type));
virBufferAdjustIndent(&buf, 2);
virBufferEscapeString(&buf, "<name>%s</name>\n", def->name);
virBufferEscapeString(&buf, "<key>%s</key>\n", def->key);
virBufferAddLit(&buf, "<source>\n");
virBufferAdjustIndent(&buf, 2);
if (def->source.nextent) {
size_t i;
const char *thispath = NULL;
for (i = 0; i < def->source.nextent; i++) {
if (thispath == NULL ||
STRNEQ(thispath, def->source.extents[i].path)) {
if (thispath != NULL)
virBufferAddLit(&buf, "</device>\n");
virBufferEscapeString(&buf, "<device path='%s'>\n",
def->source.extents[i].path);
}
virBufferAdjustIndent(&buf, 2);
virBufferAsprintf(&buf, "<extent start='%llu' end='%llu'/>\n",
def->source.extents[i].start,
def->source.extents[i].end);
virBufferAdjustIndent(&buf, -2);
thispath = def->source.extents[i].path;
}
if (thispath != NULL)
virBufferAddLit(&buf, "</device>\n");
}
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</source>\n");
virBufferAsprintf(&buf, "<capacity unit='bytes'>%llu</capacity>\n",
def->target.capacity);
virBufferAsprintf(&buf, "<allocation unit='bytes'>%llu</allocation>\n",
def->target.allocation);
/* NB: Display only - since virStorageVolInfo is limited to just
* 'capacity' and 'allocation' on output. Since we don't read this
* in, be sure it was filled in before printing */
if (def->target.physical)
virBufferAsprintf(&buf, "<physical unit='bytes'>%llu</physical>\n",
def->target.physical);
if (virStorageVolTargetDefFormat(options, &buf,
&def->target, "target") < 0)
return NULL;
if (virStorageSourceHasBacking(&def->target) &&
virStorageVolTargetDefFormat(options, &buf,
def->target.backingStore,
"backingStore") < 0)
return NULL;
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</volume>\n");
return virBufferContentAndReset(&buf);
}
static int
virStoragePoolSaveXML(const char *path,
virStoragePoolDefPtr def,
const char *xml)
{
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(def->uuid, uuidstr);
return virXMLSaveFile(path,
virXMLPickShellSafeComment(def->name, uuidstr),
"pool-edit", xml);
}
int
virStoragePoolSaveState(const char *stateFile,
virStoragePoolDefPtr def)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
g_autofree char *xml = NULL;
virBufferAddLit(&buf, "<poolstate>\n");
virBufferAdjustIndent(&buf, 2);
if (virStoragePoolDefFormatBuf(&buf, def) < 0)
return -1;
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</poolstate>\n");
if (!(xml = virBufferContentAndReset(&buf)))
return -1;
if (virStoragePoolSaveXML(stateFile, def, xml))
return -1;
return 0;
}
int
virStoragePoolSaveConfig(const char *configFile,
virStoragePoolDefPtr def)
{
g_autofree char *xml = NULL;
if (!(xml = virStoragePoolDefFormat(def))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to generate XML"));
return -1;
}
return virStoragePoolSaveXML(configFile, def, xml);
}
virStoragePoolSourcePtr
virStoragePoolSourceListNewSource(virStoragePoolSourceListPtr list)
{
virStoragePoolSourcePtr source;
if (VIR_REALLOC_N(list->sources, list->nsources + 1) < 0)
return NULL;
source = &list->sources[list->nsources++];
memset(source, 0, sizeof(*source));
return source;
}
char *
virStoragePoolSourceListFormat(virStoragePoolSourceListPtr def)
{
virStoragePoolOptionsPtr options;
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
const char *type;
size_t i;
options = virStoragePoolOptionsForPoolType(def->type);
if (options == NULL)
return NULL;
type = virStoragePoolTypeToString(def->type);
if (!type) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected pool type"));
return NULL;
}
virBufferAddLit(&buf, "<sources>\n");
virBufferAdjustIndent(&buf, 2);
for (i = 0; i < def->nsources; i++)
virStoragePoolSourceFormat(&buf, options, &def->sources[i]);
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</sources>\n");
return virBufferContentAndReset(&buf);
}
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