static void
virDomainSnapshotDiskDefFormat(virBufferPtr buf,
virDomainSnapshotDiskDefPtr disk)
{
int type = disk->src->type;
if (!disk->name)
return;
virBufferEscapeString(buf, "<disk name='%s'", disk->name);
if (disk->snapshot > 0)
virBufferAsprintf(buf, " snapshot='%s'",
virDomainSnapshotLocationTypeToString(disk->snapshot));
if (!disk->src->path && disk->src->format == 0) {
virBufferAddLit(buf, "/>\n");
return;
}
virBufferAsprintf(buf, " type='%s'>\n", virStorageTypeToString(type));
virBufferAdjustIndent(buf, 2);
if (disk->src->format > 0)
virBufferEscapeString(buf, "<driver type='%s'/>\n",
virStorageFileFormatTypeToString(disk->src->format));
virDomainDiskSourceFormat(buf, disk->src, 0, 0);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</disk>\n");
}
static void
virDomainSnapshotDiskDefFormat(virBufferPtr buf,
virDomainSnapshotDiskDefPtr disk)
{
int type = disk->type;
if (!disk->name)
return;
virBufferEscapeString(buf, " <disk name='%s'", disk->name);
if (disk->snapshot > 0)
virBufferAsprintf(buf, " snapshot='%s'",
virDomainSnapshotLocationTypeToString(disk->snapshot));
if (type < 0)
type = VIR_DOMAIN_DISK_TYPE_FILE;
if (!disk->file && disk->format == 0) {
virBufferAddLit(buf, "/>\n");
return;
}
virBufferAddLit(buf, ">\n");
if (disk->format > 0)
virBufferEscapeString(buf, " <driver type='%s'/>\n",
virStorageFileFormatTypeToString(disk->format));
virDomainDiskSourceDefFormatInternal(buf,
type,
disk->file,
0, 0, 0, NULL, 0, NULL, NULL, 0);
virBufferAddLit(buf, " </disk>\n");
}
char *virDomainSnapshotDefFormat(const char *domain_uuid,
virDomainSnapshotDefPtr def,
unsigned int flags,
int internal)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
int i;
virCheckFlags(VIR_DOMAIN_XML_SECURE |
VIR_DOMAIN_XML_UPDATE_CPU, NULL);
flags |= VIR_DOMAIN_XML_INACTIVE;
virBufferAddLit(&buf, "<domainsnapshot>\n");
virBufferEscapeString(&buf, " <name>%s</name>\n", def->name);
if (def->description)
virBufferEscapeString(&buf, " <description>%s</description>\n",
def->description);
virBufferAsprintf(&buf, " <state>%s</state>\n",
virDomainSnapshotStateTypeToString(def->state));
if (def->parent) {
virBufferAddLit(&buf, " <parent>\n");
virBufferEscapeString(&buf, " <name>%s</name>\n", def->parent);
virBufferAddLit(&buf, " </parent>\n");
}
virBufferAsprintf(&buf, " <creationTime>%lld</creationTime>\n",
def->creationTime);
if (def->memory) {
virBufferAsprintf(&buf, " <memory snapshot='%s'",
virDomainSnapshotLocationTypeToString(def->memory));
virBufferEscapeString(&buf, " file='%s'", def->file);
virBufferAddLit(&buf, "/>\n");
}
if (def->ndisks) {
virBufferAddLit(&buf, " <disks>\n");
for (i = 0; i < def->ndisks; i++) {
virDomainSnapshotDiskDefPtr disk = &def->disks[i];
if (!disk->name)
continue;
virBufferEscapeString(&buf, " <disk name='%s'", disk->name);
if (disk->snapshot)
virBufferAsprintf(&buf, " snapshot='%s'",
virDomainSnapshotLocationTypeToString(disk->snapshot));
if (disk->file || disk->format > 0) {
virBufferAddLit(&buf, ">\n");
if (disk->format > 0)
virBufferEscapeString(&buf, " <driver type='%s'/>\n",
virStorageFileFormatTypeToString(
disk->format));
if (disk->file)
virBufferEscapeString(&buf, " <source file='%s'/>\n",
disk->file);
virBufferAddLit(&buf, " </disk>\n");
} else {
virBufferAddLit(&buf, "/>\n");
}
}
virBufferAddLit(&buf, " </disks>\n");
}
if (def->dom) {
virBufferAdjustIndent(&buf, 2);
if (virDomainDefFormatInternal(def->dom, flags, &buf) < 0) {
virBufferFreeAndReset(&buf);
return NULL;
}
virBufferAdjustIndent(&buf, -2);
} else if (domain_uuid) {
virBufferAddLit(&buf, " <domain>\n");
virBufferAsprintf(&buf, " <uuid>%s</uuid>\n", domain_uuid);
virBufferAddLit(&buf, " </domain>\n");
}
if (internal)
virBufferAsprintf(&buf, " <active>%d</active>\n", def->current);
virBufferAddLit(&buf, "</domainsnapshot>\n");
if (virBufferError(&buf)) {
virBufferFreeAndReset(&buf);
virReportOOMError();
return NULL;
}
return virBufferContentAndReset(&buf);
}
/* Align def->disks to def->domain. Sort the list of def->disks,
* filling in any missing disks or snapshot state defaults given by
* the domain, with a fallback to a passed in default. Convert paths
* to disk targets for uniformity. Issue an error and return -1 if
* any def->disks[n]->name appears more than once or does not map to
* dom->disks. If require_match, also ensure that there is no
* conflicting requests for both internal and external snapshots. */
int
virDomainSnapshotAlignDisks(virDomainSnapshotDefPtr def,
int default_snapshot,
bool require_match)
{
int ret = -1;
virBitmapPtr map = NULL;
int i;
int ndisks;
bool inuse;
if (!def->dom) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing domain in snapshot"));
goto cleanup;
}
if (def->ndisks > def->dom->ndisks) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("too many disk snapshot requests for domain"));
goto cleanup;
}
/* Unlikely to have a guest without disks but technically possible. */
if (!def->dom->ndisks) {
ret = 0;
goto cleanup;
}
if (!(map = virBitmapNew(def->dom->ndisks))) {
virReportOOMError();
goto cleanup;
}
/* Double check requested disks. */
for (i = 0; i < def->ndisks; i++) {
virDomainSnapshotDiskDefPtr disk = &def->disks[i];
int idx = virDomainDiskIndexByName(def->dom, disk->name, false);
int disk_snapshot;
if (idx < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("no disk named '%s'"), disk->name);
goto cleanup;
}
if (virBitmapGetBit(map, idx, &inuse) < 0 || inuse) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk '%s' specified twice"),
disk->name);
goto cleanup;
}
ignore_value(virBitmapSetBit(map, idx));
disk->index = idx;
disk_snapshot = def->dom->disks[idx]->snapshot;
if (!disk->snapshot) {
if (disk_snapshot &&
(!require_match ||
disk_snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE))
disk->snapshot = disk_snapshot;
else
disk->snapshot = default_snapshot;
} else if (require_match &&
disk->snapshot != default_snapshot &&
!(disk->snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE &&
disk_snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE)) {
const char *tmp;
tmp = virDomainSnapshotLocationTypeToString(default_snapshot);
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk '%s' must use snapshot mode '%s'"),
disk->name, tmp);
goto cleanup;
}
if (disk->file &&
disk->snapshot != VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("file '%s' for disk '%s' requires "
"use of external snapshot mode"),
disk->file, disk->name);
goto cleanup;
}
if (STRNEQ(disk->name, def->dom->disks[idx]->dst)) {
VIR_FREE(disk->name);
if (!(disk->name = strdup(def->dom->disks[idx]->dst))) {
virReportOOMError();
goto cleanup;
}
}
}
/* Provide defaults for all remaining disks. */
ndisks = def->ndisks;
if (VIR_EXPAND_N(def->disks, def->ndisks,
def->dom->ndisks - def->ndisks) < 0) {
virReportOOMError();
goto cleanup;
}
for (i = 0; i < def->dom->ndisks; i++) {
virDomainSnapshotDiskDefPtr disk;
ignore_value(virBitmapGetBit(map, i, &inuse));
if (inuse)
continue;
disk = &def->disks[ndisks++];
if (!(disk->name = strdup(def->dom->disks[i]->dst))) {
virReportOOMError();
goto cleanup;
}
disk->index = i;
disk->snapshot = def->dom->disks[i]->snapshot;
if (!disk->snapshot)
disk->snapshot = default_snapshot;
}
qsort(&def->disks[0], def->ndisks, sizeof(def->disks[0]), disksorter);
/* Generate any default external file names, but only if the
* backing file is a regular file. */
for (i = 0; i < def->ndisks; i++) {
virDomainSnapshotDiskDefPtr disk = &def->disks[i];
if (disk->snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL &&
!disk->file) {
const char *original = def->dom->disks[i]->src;
const char *tmp;
struct stat sb;
if (!original) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("cannot generate external snapshot name "
"for disk '%s' without source"),
disk->name);
goto cleanup;
}
if (stat(original, &sb) < 0 || !S_ISREG(sb.st_mode)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("source for disk '%s' is not a regular "
"file; refusing to generate external "
"snapshot name"),
disk->name);
goto cleanup;
}
tmp = strrchr(original, '.');
if (!tmp || strchr(tmp, '/')) {
ignore_value(virAsprintf(&disk->file, "%s.%s",
original, def->name));
} else {
if ((tmp - original) > INT_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("integer overflow"));
goto cleanup;
}
ignore_value(virAsprintf(&disk->file, "%.*s.%s",
(int) (tmp - original), original,
def->name));
}
if (!disk->file) {
virReportOOMError();
goto cleanup;
}
}
}
ret = 0;
cleanup:
virBitmapFree(map);
return ret;
}
char *virDomainSnapshotDefFormat(const char *domain_uuid,
virDomainSnapshotDefPtr def,
unsigned int flags,
int internal)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
size_t i;
virCheckFlags(VIR_DOMAIN_DEF_FORMAT_SECURE |
VIR_DOMAIN_DEF_FORMAT_UPDATE_CPU, NULL);
flags |= VIR_DOMAIN_DEF_FORMAT_INACTIVE;
virBufferAddLit(&buf, "<domainsnapshot>\n");
virBufferAdjustIndent(&buf, 2);
virBufferEscapeString(&buf, "<name>%s</name>\n", def->name);
if (def->description)
virBufferEscapeString(&buf, "<description>%s</description>\n",
def->description);
virBufferAsprintf(&buf, "<state>%s</state>\n",
virDomainSnapshotStateTypeToString(def->state));
if (def->parent) {
virBufferAddLit(&buf, "<parent>\n");
virBufferAdjustIndent(&buf, 2);
virBufferEscapeString(&buf, "<name>%s</name>\n", def->parent);
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</parent>\n");
}
virBufferAsprintf(&buf, "<creationTime>%lld</creationTime>\n",
def->creationTime);
if (def->memory) {
virBufferAsprintf(&buf, "<memory snapshot='%s'",
virDomainSnapshotLocationTypeToString(def->memory));
virBufferEscapeString(&buf, " file='%s'", def->file);
virBufferAddLit(&buf, "/>\n");
}
if (def->ndisks) {
virBufferAddLit(&buf, "<disks>\n");
virBufferAdjustIndent(&buf, 2);
for (i = 0; i < def->ndisks; i++)
virDomainSnapshotDiskDefFormat(&buf, &def->disks[i]);
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</disks>\n");
}
if (def->dom) {
if (virDomainDefFormatInternal(def->dom, flags, &buf) < 0) {
virBufferFreeAndReset(&buf);
return NULL;
}
} else if (domain_uuid) {
virBufferAddLit(&buf, "<domain>\n");
virBufferAdjustIndent(&buf, 2);
virBufferAsprintf(&buf, "<uuid>%s</uuid>\n", domain_uuid);
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</domain>\n");
}
if (internal)
virBufferAsprintf(&buf, "<active>%d</active>\n", def->current);
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</domainsnapshot>\n");
if (virBufferCheckError(&buf) < 0)
return NULL;
return virBufferContentAndReset(&buf);
}
