The backing store indexes were not bound to the storage sources in any
way. To allow us to bind a given alias to a given storage source we need
to save the index in virStorageSource. The backing store ids are now
generated when detecting the backing chain.
Since we don't re-detect the backing chain after snapshots, the
numbering needs to be fixed there.
---
src/conf/domain_conf.c | 22 +++++++++++++++-------
src/qemu/qemu_driver.c | 14 ++++++++++++++
src/storage/storage_source.c | 9 ++++++---
src/util/virstoragefile.c | 1 +
src/util/virstoragefile.h | 1 +
5 files changed, 37 insertions(+), 10 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index f7c9160b4..45fa57a14 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -8269,6 +8269,7 @@ virDomainDiskBackingStoreParse(xmlXPathContextPtr ctxt,
xmlNodePtr source;
char *type = NULL;
char *format = NULL;
+ char *idx = NULL;
int ret = -1;
if (!(ctxt->node = virXPathNode("./backingStore[*]", ctxt))) {
@@ -8279,6 +8280,13 @@ virDomainDiskBackingStoreParse(xmlXPathContextPtr ctxt,
if (VIR_ALLOC(backingStore) < 0)
goto cleanup;
+ if (!(flags & VIR_DOMAIN_DEF_PARSE_INACTIVE) &&
+ (idx = virXMLPropString(ctxt->node, "index")) &&
+ virStrToLong_uip(idx, NULL, 10, &backingStore->id) < 0) {
+ virReportError(VIR_ERR_XML_ERROR, _("invalid disk index '%s'"), idx);
+ goto cleanup;
+ }
+
if (!(type = virXMLPropString(ctxt->node, "type"))) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("missing disk backing store type"));
@@ -21898,8 +21906,7 @@ virDomainDiskSourceFormat(virBufferPtr buf,
static int
virDomainDiskBackingStoreFormat(virBufferPtr buf,
virStorageSourcePtr backingStore,
- const char *backingStoreRaw,
- unsigned int idx)
+ const char *backingStoreRaw)
{
const char *type;
const char *format;
@@ -21926,8 +21933,10 @@ virDomainDiskBackingStoreFormat(virBufferPtr buf,
return -1;
}
- virBufferAsprintf(buf, "<backingStore type='%s' index='%u'>\n",
- type, idx);
+ virBufferAsprintf(buf, "<backingStore type='%s'", type);
+ if (backingStore->id != 0)
+ virBufferAsprintf(buf, " index='%u'", backingStore->id);
+ virBufferAddLit(buf, ">\n");
virBufferAdjustIndent(buf, 2);
virBufferAsprintf(buf, "<format type='%s'/>\n", format);
@@ -21935,8 +21944,7 @@ virDomainDiskBackingStoreFormat(virBufferPtr buf,
if (virDomainDiskSourceFormatInternal(buf, backingStore, 0, 0, true) < 0 ||
virDomainDiskBackingStoreFormat(buf,
backingStore->backingStore,
- backingStore->backingStoreRaw,
- idx + 1) < 0)
+ backingStore->backingStoreRaw) < 0)
return -1;
virBufferAdjustIndent(buf, -2);
@@ -22072,7 +22080,7 @@ virDomainDiskDefFormat(virBufferPtr buf,
* persistent storage of backing chains is ready. */
if (!(flags & VIR_DOMAIN_DEF_FORMAT_INACTIVE) &&
virDomainDiskBackingStoreFormat(buf, def->src->backingStore,
- def->src->backingStoreRaw, 1) < 0)
+ def->src->backingStoreRaw) < 0)
return -1;
virBufferEscapeString(buf, "<backenddomain name='%s'/>\n", def->domain_name);
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 7c6f1674a..0260c40ef 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -14442,6 +14442,17 @@ qemuDomainSnapshotDiskDataCollect(virQEMUDriverPtr driver,
}
+static void
+qemuDomainSnapshotUpdateDiskSourcesRenumber(virStorageSourcePtr src)
+{
+ virStorageSourcePtr next;
+ unsigned int idx = 1;
+
+ for (next = src->backingStore; next; next = next->backingStore)
+ next->id = idx++;
+}
+
+
/**
* qemuDomainSnapshotUpdateDiskSources:
* @dd: snapshot disk data object
@@ -14464,6 +14475,9 @@ qemuDomainSnapshotUpdateDiskSources(qemuDomainSnapshotDiskDataPtr dd,
VIR_STEAL_PTR(dd->src->backingStore, dd->disk->src);
VIR_STEAL_PTR(dd->disk->src, dd->src);
+ /* fix numbering of disks */
+ qemuDomainSnapshotUpdateDiskSourcesRenumber(dd->disk->src);
+
if (dd->persistdisk) {
VIR_STEAL_PTR(dd->persistsrc->backingStore, dd->persistdisk->src);
VIR_STEAL_PTR(dd->persistdisk->src, dd->persistsrc);
diff --git a/src/storage/storage_source.c b/src/storage/storage_source.c
index bf4762237..864c69928 100644
--- a/src/storage/storage_source.c
+++ b/src/storage/storage_source.c
@@ -396,7 +396,8 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
uid_t uid, gid_t gid,
bool allow_probe,
bool report_broken,
- virHashTablePtr cycle)
+ virHashTablePtr cycle,
+ unsigned int depth)
{
int ret = -1;
const char *uniqueName;
@@ -474,7 +475,7 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
if ((ret = virStorageFileGetMetadataRecurse(backingStore, parent,
uid, gid,
allow_probe, report_broken,
- cycle)) < 0) {
+ cycle, depth + 1)) < 0) {
if (report_broken)
goto cleanup;
@@ -489,6 +490,8 @@ virStorageFileGetMetadataRecurse(virStorageSourcePtr src,
ret = 0;
cleanup:
+ if (src->backingStore)
+ src->backingStore->id = depth;
VIR_FREE(buf);
virStorageFileDeinit(src);
virStorageSourceFree(backingStore);
@@ -543,7 +546,7 @@ virStorageFileGetMetadata(virStorageSourcePtr src,
}
ret = virStorageFileGetMetadataRecurse(src, src, uid, gid,
- allow_probe, report_broken, cycle);
+ allow_probe, report_broken, cycle, 1);
virHashFree(cycle);
return ret;
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index dd4494940..2b9f4c892 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -2030,6 +2030,7 @@ virStorageSourceCopy(const virStorageSource *src,
if (VIR_ALLOC(ret) < 0)
return NULL;
+ ret->id = src->id;
ret->type = src->type;
ret->protocol = src->protocol;
ret->format = src->format;
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index 74dee10f2..d3bafefc3 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -227,6 +227,7 @@ typedef virStorageSource *virStorageSourcePtr;
* IMPORTANT: When adding fields to this struct it's also necessary to add
* appropriate code to the virStorageSourceCopy deep copy function */
struct _virStorageSource {
+ unsigned int id; /* backing chain identifier, 0 is unset */
int type; /* virStorageType */
char *path;
int protocol; /* virStorageNetProtocol */
--
2.14.1
--
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