static int
virDomainSnapshotDiskDefParseXML(xmlNodePtr node,
virDomainSnapshotDiskDefPtr def)
{
int ret = -1;
char *snapshot = NULL;
xmlNodePtr cur;
def->name = virXMLPropString(node, "name");
if (!def->name) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing name from disk snapshot element"));
goto cleanup;
}
snapshot = virXMLPropString(node, "snapshot");
if (snapshot) {
def->snapshot = virDomainSnapshotLocationTypeFromString(snapshot);
if (def->snapshot <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown disk snapshot setting '%s'"),
snapshot);
goto cleanup;
}
}
cur = node->children;
while (cur) {
if (cur->type == XML_ELEMENT_NODE) {
if (!def->file &&
xmlStrEqual(cur->name, BAD_CAST "source")) {
def->file = virXMLPropString(cur, "file");
} else if (!def->format &&
xmlStrEqual(cur->name, BAD_CAST "driver")) {
char *driver = virXMLPropString(cur, "type");
def->format = virStorageFileFormatTypeFromString(driver);
if (def->format <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown disk snapshot driver '%s'"),
driver);
VIR_FREE(driver);
goto cleanup;
}
VIR_FREE(driver);
}
}
cur = cur->next;
}
if (!def->snapshot && (def->file || def->format))
def->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
ret = 0;
cleanup:
VIR_FREE(snapshot);
if (ret < 0)
virDomainSnapshotDiskDefClear(def);
return ret;
}
/**
* Iterate over the pool's directory and enumerate all disk images
* within it. This is non-recursive.
*/
static int
virStorageBackendFileSystemRefresh(virConnectPtr conn ATTRIBUTE_UNUSED,
virStoragePoolObjPtr pool)
{
DIR *dir;
struct dirent *ent;
struct statvfs sb;
virStorageVolDefPtr vol = NULL;
if (!(dir = opendir(pool->def->target.path))) {
virReportSystemError(errno,
_("cannot open path '%s'"),
pool->def->target.path);
goto cleanup;
}
while ((ent = readdir(dir)) != NULL) {
int ret;
char *backingStore;
if (VIR_ALLOC(vol) < 0)
goto no_memory;
if ((vol->name = strdup(ent->d_name)) == NULL)
goto no_memory;
vol->type = VIR_STORAGE_VOL_FILE;
vol->target.format = VIR_STORAGE_FILE_RAW; /* Real value is filled in during probe */
if (virAsprintf(&vol->target.path, "%s/%s",
pool->def->target.path,
vol->name) == -1)
goto no_memory;
if ((vol->key = strdup(vol->target.path)) == NULL)
goto no_memory;
if ((ret = virStorageBackendProbeTarget(&vol->target,
&backingStore,
&vol->allocation,
&vol->capacity,
&vol->target.encryption)) < 0) {
if (ret == -1)
goto cleanup;
else {
/* Silently ignore non-regular files,
* eg '.' '..', 'lost+found' */
virStorageVolDefFree(vol);
vol = NULL;
continue;
}
}
if (backingStore != NULL) {
if (vol->target.format == VIR_STORAGE_FILE_QCOW2 &&
STRPREFIX("fmt:", backingStore)) {
char *fmtstr = backingStore + 4;
char *path = strchr(fmtstr, ':');
if (!path) {
VIR_FREE(backingStore);
} else {
*path = '\0';
if ((vol->backingStore.format =
virStorageFileFormatTypeFromString(fmtstr)) < 0) {
VIR_FREE(backingStore);
} else {
memmove(backingStore, path, strlen(path) + 1);
vol->backingStore.path = backingStore;
if (virStorageBackendUpdateVolTargetInfo(&vol->backingStore,
NULL,
NULL) < 0)
VIR_FREE(vol->backingStore);
}
}
} else {
vol->backingStore.path = backingStore;
if ((ret = virStorageBackendProbeTarget(&vol->backingStore,
NULL, NULL, NULL,
NULL)) < 0) {
if (ret == -1)
goto cleanup;
else {
/* Silently ignore non-regular files,
* eg '.' '..', 'lost+found' */
VIR_FREE(vol->backingStore);
}
}
}
}
if (VIR_REALLOC_N(pool->volumes.objs,
pool->volumes.count+1) < 0)
goto no_memory;
pool->volumes.objs[pool->volumes.count++] = vol;
vol = NULL;
}
closedir(dir);
if (statvfs(pool->def->target.path, &sb) < 0) {
virReportSystemError(errno,
_("cannot statvfs path '%s'"),
pool->def->target.path);
return -1;
}
pool->def->capacity = ((unsigned long long)sb.f_frsize *
(unsigned long long)sb.f_blocks);
pool->def->available = ((unsigned long long)sb.f_bfree *
(unsigned long long)sb.f_bsize);
pool->def->allocation = pool->def->capacity - pool->def->available;
return 0;
no_memory:
virReportOOMError();
/* fallthrough */
cleanup:
if (dir)
closedir(dir);
virStorageVolDefFree(vol);
virStoragePoolObjClearVols(pool);
return -1;
}
static int
virDomainSnapshotDiskDefParseXML(xmlNodePtr node,
xmlXPathContextPtr ctxt,
virDomainSnapshotDiskDefPtr def)
{
int ret = -1;
char *snapshot = NULL;
char *type = NULL;
xmlNodePtr cur;
if (VIR_ALLOC(def->src) < 0)
goto cleanup;
def->name = virXMLPropString(node, "name");
if (!def->name) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing name from disk snapshot element"));
goto cleanup;
}
snapshot = virXMLPropString(node, "snapshot");
if (snapshot) {
def->snapshot = virDomainSnapshotLocationTypeFromString(snapshot);
if (def->snapshot <= 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown disk snapshot setting '%s'"),
snapshot);
goto cleanup;
}
}
if ((type = virXMLPropString(node, "type"))) {
if ((def->src->type = virStorageTypeFromString(type)) <= 0 ||
def->src->type == VIR_STORAGE_TYPE_VOLUME ||
def->src->type == VIR_STORAGE_TYPE_DIR) {
virReportError(VIR_ERR_XML_ERROR,
_("unknown disk snapshot type '%s'"), type);
goto cleanup;
}
} else {
def->src->type = VIR_STORAGE_TYPE_FILE;
}
for (cur = node->children; cur; cur = cur->next) {
if (cur->type != XML_ELEMENT_NODE)
continue;
if (!def->src->path &&
xmlStrEqual(cur->name, BAD_CAST "source")) {
if (virDomainDiskSourceParse(cur, ctxt, def->src) < 0)
goto cleanup;
} else if (!def->src->format &&
xmlStrEqual(cur->name, BAD_CAST "driver")) {
char *driver = virXMLPropString(cur, "type");
if (driver) {
def->src->format = virStorageFileFormatTypeFromString(driver);
if (def->src->format < VIR_STORAGE_FILE_BACKING) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
def->src->format <= 0
? _("unknown disk snapshot driver '%s'")
: _("disk format '%s' lacks backing file "
"support"),
driver);
VIR_FREE(driver);
goto cleanup;
}
VIR_FREE(driver);
}
}
}
/* validate that the passed path is absolute */
if (virStorageSourceIsLocalStorage(def->src) &&
def->src->path &&
def->src->path[0] != '/') {
virReportError(VIR_ERR_XML_ERROR,
_("disk snapshot image path '%s' must be absolute"),
def->src->path);
goto cleanup;
}
if (!def->snapshot && (def->src->path || def->src->format))
def->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
ret = 0;
cleanup:
VIR_FREE(snapshot);
VIR_FREE(type);
if (ret < 0)
virDomainSnapshotDiskDefClear(def);
return ret;
}
static int
xenParseXMDisk(virConfPtr conf, virDomainDefPtr def)
{
virDomainDiskDefPtr disk = NULL;
int hvm = def->os.type == VIR_DOMAIN_OSTYPE_HVM;
virConfValuePtr list = virConfGetValue(conf, "disk");
if (list && list->type == VIR_CONF_LIST) {
list = list->list;
while (list) {
char *head;
char *offset;
char *tmp;
const char *src;
if ((list->type != VIR_CONF_STRING) || (list->str == NULL))
goto skipdisk;
head = list->str;
if (!(disk = virDomainDiskDefNew(NULL)))
return -1;
/*
* Disks have 3 components, SOURCE,DEST-DEVICE,MODE
* eg, phy:/dev/HostVG/XenGuest1,xvda,w
* The SOURCE is usually prefixed with a driver type,
* and optionally driver sub-type
* The DEST-DEVICE is optionally post-fixed with disk type
*/
/* Extract the source file path*/
if (!(offset = strchr(head, ',')))
goto skipdisk;
if (offset == head) {
/* No source file given, eg CDROM with no media */
ignore_value(virDomainDiskSetSource(disk, NULL));
} else {
if (VIR_STRNDUP(tmp, head, offset - head) < 0)
goto cleanup;
if (virDomainDiskSetSource(disk, tmp) < 0) {
VIR_FREE(tmp);
goto cleanup;
}
VIR_FREE(tmp);
}
head = offset + 1;
/* Remove legacy ioemu: junk */
if (STRPREFIX(head, "ioemu:"))
head = head + 6;
/* Extract the dest device name */
if (!(offset = strchr(head, ',')))
goto skipdisk;
if (VIR_ALLOC_N(disk->dst, (offset - head) + 1) < 0)
goto cleanup;
if (virStrncpy(disk->dst, head, offset - head,
(offset - head) + 1) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Dest file %s too big for destination"), head);
goto cleanup;
}
head = offset + 1;
/* Extract source driver type */
src = virDomainDiskGetSource(disk);
if (src) {
size_t len;
/* The main type phy:, file:, tap: ... */
if ((tmp = strchr(src, ':')) != NULL) {
len = tmp - src;
if (VIR_STRNDUP(tmp, src, len) < 0)
goto cleanup;
if (virDomainDiskSetDriver(disk, tmp) < 0) {
VIR_FREE(tmp);
goto cleanup;
}
VIR_FREE(tmp);
/* Strip the prefix we found off the source file name */
if (virDomainDiskSetSource(disk, src + len + 1) < 0)
goto cleanup;
src = virDomainDiskGetSource(disk);
}
/* And the sub-type for tap:XXX: type */
if (STREQ_NULLABLE(virDomainDiskGetDriver(disk), "tap")) {
char *driverType;
if (!(tmp = strchr(src, ':')))
goto skipdisk;
len = tmp - src;
if (VIR_STRNDUP(driverType, src, len) < 0)
goto cleanup;
if (STREQ(driverType, "aio"))
virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_RAW);
else
virDomainDiskSetFormat(disk,
virStorageFileFormatTypeFromString(driverType));
VIR_FREE(driverType);
if (virDomainDiskGetFormat(disk) <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown driver type %s"),
src);
goto cleanup;
}
/* Strip the prefix we found off the source file name */
if (virDomainDiskSetSource(disk, src + len + 1) < 0)
goto cleanup;
src = virDomainDiskGetSource(disk);
}
}
/* No source, or driver name, so fix to phy: */
if (!virDomainDiskGetDriver(disk) &&
virDomainDiskSetDriver(disk, "phy") < 0)
goto cleanup;
/* phy: type indicates a block device */
virDomainDiskSetType(disk,
STREQ(virDomainDiskGetDriver(disk), "phy") ?
VIR_STORAGE_TYPE_BLOCK :
VIR_STORAGE_TYPE_FILE);
/* Check for a :cdrom/:disk postfix */
disk->device = VIR_DOMAIN_DISK_DEVICE_DISK;
if ((tmp = strchr(disk->dst, ':')) != NULL) {
if (STREQ(tmp, ":cdrom"))
disk->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
tmp[0] = '\0';
}
if (STRPREFIX(disk->dst, "xvd") || !hvm) {
disk->bus = VIR_DOMAIN_DISK_BUS_XEN;
} else if (STRPREFIX(disk->dst, "sd")) {
disk->bus = VIR_DOMAIN_DISK_BUS_SCSI;
} else {
disk->bus = VIR_DOMAIN_DISK_BUS_IDE;
}
if (STREQ(head, "r") ||
STREQ(head, "ro"))
disk->src->readonly = true;
else if ((STREQ(head, "w!")) ||
(STREQ(head, "!")))
disk->src->shared = true;
/* Maintain list in sorted order according to target device name */
if (VIR_APPEND_ELEMENT(def->disks, def->ndisks, disk) < 0)
goto cleanup;
skipdisk:
list = list->next;
virDomainDiskDefFree(disk);
disk = NULL;
}
}
return 0;
cleanup:
virDomainDiskDefFree(disk);
return -1;
}
