[libvirt] [PATCH v6 5/8] snapshot: Break out virDomainSnapshotObjList into its own file
Eric Blake
eblake at redhat.com
Fri Mar 15 05:02:30 UTC 2019
snapshot_conf.h was mixing three separate types: the snapshot
definition, the snapshot object, and the snapshot object list.
Separate out the snapshot object list code into its own file, and
update includes for affected clients.
This is just code motion, but done in preparation of sharing a lot of
the object list code with checkpoints.
Signed-off-by: Eric Blake <eblake at redhat.com>
---
src/conf/snapshot_conf.h | 43 ---
src/conf/virdomainsnapshotobjlist.h | 74 ++++
src/conf/Makefile.inc.am | 2 +
src/conf/domain_conf.c | 1 +
src/conf/snapshot_conf.c | 519 +-------------------------
src/conf/virdomainobjlist.c | 1 +
src/conf/virdomainsnapshotobj.c | 1 +
src/conf/virdomainsnapshotobjlist.c | 553 ++++++++++++++++++++++++++++
src/libvirt_private.syms | 27 +-
src/qemu/qemu_command.c | 1 +
src/qemu/qemu_domain.c | 1 +
src/qemu/qemu_driver.c | 1 +
src/qemu/qemu_migration.c | 1 +
src/test/test_driver.c | 1 +
14 files changed, 653 insertions(+), 573 deletions(-)
create mode 100644 src/conf/virdomainsnapshotobjlist.h
create mode 100644 src/conf/virdomainsnapshotobjlist.c
diff --git a/src/conf/snapshot_conf.h b/src/conf/snapshot_conf.h
index c816ad06e1..7230b9950f 100644
--- a/src/conf/snapshot_conf.h
+++ b/src/conf/snapshot_conf.h
@@ -24,7 +24,6 @@
# include "internal.h"
# include "domain_conf.h"
-# include "virdomainsnapshotobj.h"
/* Items related to snapshot state */
@@ -94,10 +93,6 @@ struct _virDomainSnapshotDef {
bool current; /* At most one snapshot in the list should have this set */
};
-
-virDomainSnapshotObjListPtr virDomainSnapshotObjListNew(void);
-void virDomainSnapshotObjListFree(virDomainSnapshotObjListPtr snapshots);
-
typedef enum {
VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE = 1 << 0,
VIR_DOMAIN_SNAPSHOT_PARSE_DISKS = 1 << 1,
@@ -121,13 +116,6 @@ virDomainSnapshotDefPtr virDomainSnapshotDefParseNode(xmlDocPtr xml,
virCapsPtr caps,
virDomainXMLOptionPtr xmlopt,
unsigned int flags);
-int virDomainSnapshotObjListParse(const char *xmlStr,
- const unsigned char *domain_uuid,
- virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr *current_snap,
- virCapsPtr caps,
- virDomainXMLOptionPtr xmlopt,
- unsigned int flags);
void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def);
char *virDomainSnapshotDefFormat(const char *uuidstr,
virDomainSnapshotDefPtr def,
@@ -141,34 +129,9 @@ int virDomainSnapshotDefFormatInternal(virBufferPtr buf,
virDomainXMLOptionPtr xmlopt,
unsigned int flags);
-int virDomainSnapshotObjListFormat(virBufferPtr buf,
- const char *uuidstr,
- virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr current_snapshot,
- virCapsPtr caps,
- virDomainXMLOptionPtr xmlopt,
- unsigned int flags);
int virDomainSnapshotAlignDisks(virDomainSnapshotDefPtr snapshot,
int default_snapshot,
bool require_match);
-virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotDefPtr def);
-
-int virDomainSnapshotObjListGetNames(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr from,
- char **const names, int maxnames,
- unsigned int flags);
-int virDomainSnapshotObjListNum(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr from,
- unsigned int flags);
-virDomainSnapshotObjPtr virDomainSnapshotFindByName(virDomainSnapshotObjListPtr snapshots,
- const char *name);
-void virDomainSnapshotObjListRemove(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr snapshot);
-int virDomainSnapshotForEach(virDomainSnapshotObjListPtr snapshots,
- virHashIterator iter,
- void *data);
-int virDomainSnapshotUpdateRelations(virDomainSnapshotObjListPtr snapshots);
# define VIR_DOMAIN_SNAPSHOT_FILTERS_METADATA \
(VIR_DOMAIN_SNAPSHOT_LIST_METADATA | \
@@ -193,12 +156,6 @@ int virDomainSnapshotUpdateRelations(virDomainSnapshotObjListPtr snapshots);
VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS | \
VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION)
-int virDomainListSnapshots(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr from,
- virDomainPtr dom,
- virDomainSnapshotPtr **snaps,
- unsigned int flags);
-
bool virDomainSnapshotDefIsExternal(virDomainSnapshotDefPtr def);
bool virDomainSnapshotIsExternal(virDomainSnapshotObjPtr snap);
diff --git a/src/conf/virdomainsnapshotobjlist.h b/src/conf/virdomainsnapshotobjlist.h
new file mode 100644
index 0000000000..ae4799c025
--- /dev/null
+++ b/src/conf/virdomainsnapshotobjlist.h
@@ -0,0 +1,74 @@
+/*
+ * virdomainsnapshotobjlist.h: handle a tree of snapshot objects
+ * (derived from snapshot_conf.h)
+ *
+ * Copyright (C) 2006-2019 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/>.
+ */
+
+#ifndef LIBVIRT_VIRDOMAINSNAPSHOTOBJLIST_H
+# define LIBVIRT_VIRDOMAINSNAPSHOTOBJLIST_H
+
+# include "internal.h"
+# include "virdomainsnapshotobj.h"
+# include "capabilities.h"
+# include "virbuffer.h"
+
+virDomainSnapshotObjListPtr virDomainSnapshotObjListNew(void);
+void virDomainSnapshotObjListFree(virDomainSnapshotObjListPtr snapshots);
+
+int virDomainSnapshotObjListParse(const char *xmlStr,
+ const unsigned char *domain_uuid,
+ virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr *current_snap,
+ virCapsPtr caps,
+ virDomainXMLOptionPtr xmlopt,
+ unsigned int flags);
+int virDomainSnapshotObjListFormat(virBufferPtr buf,
+ const char *uuidstr,
+ virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr current_snapshot,
+ virCapsPtr caps,
+ virDomainXMLOptionPtr xmlopt,
+ unsigned int flags);
+
+virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotDefPtr def);
+
+int virDomainSnapshotObjListGetNames(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr from,
+ char **const names, int maxnames,
+ unsigned int flags);
+int virDomainSnapshotObjListNum(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr from,
+ unsigned int flags);
+virDomainSnapshotObjPtr virDomainSnapshotFindByName(virDomainSnapshotObjListPtr snapshots,
+ const char *name);
+void virDomainSnapshotObjListRemove(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr snapshot);
+int virDomainSnapshotForEach(virDomainSnapshotObjListPtr snapshots,
+ virHashIterator iter,
+ void *data);
+int virDomainSnapshotUpdateRelations(virDomainSnapshotObjListPtr snapshots);
+
+int virDomainListSnapshots(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr from,
+ virDomainPtr dom,
+ virDomainSnapshotPtr **snaps,
+ unsigned int flags);
+
+#endif /* LIBVIRT_VIRDOMAINSNAPSHOTOBJLIST_H */
diff --git a/src/conf/Makefile.inc.am b/src/conf/Makefile.inc.am
index be941ee7e2..9b4d80485b 100644
--- a/src/conf/Makefile.inc.am
+++ b/src/conf/Makefile.inc.am
@@ -31,6 +31,8 @@ DOMAIN_CONF_SOURCES = \
conf/virdomainobjlist.h \
conf/virdomainsnapshotobj.c \
conf/virdomainsnapshotobj.h \
+ conf/virdomainsnapshotobjlist.c \
+ conf/virdomainsnapshotobjlist.h \
$(NULL)
OBJECT_EVENT_SOURCES = \
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 114d7edf4f..504c24b545 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -57,6 +57,7 @@
#include "virnetdevmacvlan.h"
#include "virhostdev.h"
#include "virmdev.h"
+#include "virdomainsnapshotobjlist.h"
#define VIR_FROM_THIS VIR_FROM_DOMAIN
diff --git a/src/conf/snapshot_conf.c b/src/conf/snapshot_conf.c
index 560150977b..ffb1313c89 100644
--- a/src/conf/snapshot_conf.c
+++ b/src/conf/snapshot_conf.c
@@ -45,6 +45,7 @@
#include "virerror.h"
#include "virxml.h"
#include "virstring.h"
+#include "virdomainsnapshotobjlist.h"
#define VIR_FROM_THIS VIR_FROM_DOMAIN_SNAPSHOT
@@ -70,14 +71,6 @@ VIR_ENUM_IMPL(virDomainSnapshotState, VIR_DOMAIN_SNAPSHOT_LAST,
"disk-snapshot",
);
-struct _virDomainSnapshotObjList {
- /* name string -> virDomainSnapshotObj mapping
- * for O(1), lockless lookup-by-name */
- virHashTable *objs;
-
- virDomainSnapshotObj metaroot; /* Special parent of all root snapshots */
-};
-
/* Snapshot Def functions */
static void
virDomainSnapshotDiskDefClear(virDomainSnapshotDiskDefPtr disk)
@@ -507,116 +500,6 @@ virDomainSnapshotRedefineValidate(virDomainSnapshotDefPtr def,
}
-/* Parse a <snapshots> XML entry into snapshots, which must start empty.
- * Any <domain> sub-elements of a <domainsnapshot> must match domain_uuid.
- */
-int
-virDomainSnapshotObjListParse(const char *xmlStr,
- const unsigned char *domain_uuid,
- virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr *current_snap,
- virCapsPtr caps,
- virDomainXMLOptionPtr xmlopt,
- unsigned int flags)
-{
- int ret = -1;
- xmlDocPtr xml;
- xmlNodePtr root;
- xmlXPathContextPtr ctxt = NULL;
- int n;
- size_t i;
- int keepBlanksDefault = xmlKeepBlanksDefault(0);
- VIR_AUTOFREE(xmlNodePtr *) nodes = NULL;
- VIR_AUTOFREE(char *) current = NULL;
-
- if (!(flags & VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE) ||
- (flags & VIR_DOMAIN_SNAPSHOT_PARSE_INTERNAL)) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("incorrect flags for bulk parse"));
- return -1;
- }
- if (snapshots->metaroot.nchildren || *current_snap) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("bulk define of snapshots only possible with "
- "no existing snapshot"));
- return -1;
- }
-
- if (!(xml = virXMLParse(NULL, xmlStr, _("(domain_snapshot)"))))
- return -1;
-
- root = xmlDocGetRootElement(xml);
- if (!virXMLNodeNameEqual(root, "snapshots")) {
- virReportError(VIR_ERR_XML_ERROR,
- _("unexpected root element <%s>, "
- "expecting <snapshots>"), root->name);
- goto cleanup;
- }
- ctxt = xmlXPathNewContext(xml);
- if (ctxt == NULL) {
- virReportOOMError();
- goto cleanup;
- }
- ctxt->node = root;
- current = virXMLPropString(root, "current");
-
- if ((n = virXPathNodeSet("./domainsnapshot", ctxt, &nodes)) < 0)
- goto cleanup;
- if (!n) {
- virReportError(VIR_ERR_XML_ERROR, "%s",
- _("expected at least one <domainsnapshot> child"));
- goto cleanup;
- }
-
- for (i = 0; i < n; i++) {
- virDomainSnapshotDefPtr def;
- virDomainSnapshotObjPtr snap;
-
- def = virDomainSnapshotDefParseNode(xml, nodes[i], caps, xmlopt, flags);
- if (!def)
- goto cleanup;
- if (!(snap = virDomainSnapshotAssignDef(snapshots, def))) {
- virDomainSnapshotDefFree(def);
- goto cleanup;
- }
- if (virDomainSnapshotRedefineValidate(def, domain_uuid, NULL, NULL,
- flags) < 0)
- goto cleanup;
- }
-
- if (virDomainSnapshotUpdateRelations(snapshots) < 0) {
- virReportError(VIR_ERR_XML_ERROR, "%s",
- _("<snapshots> contains inconsistent parent-child "
- "relationships"));
- goto cleanup;
- }
-
- if (current) {
- if (!(*current_snap = virDomainSnapshotFindByName(snapshots,
- current))) {
- virReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
- _("no snapshot matching current='%s'"), current);
- goto cleanup;
- }
- (*current_snap)->def->current = true;
- }
-
- ret = 0;
- cleanup:
- if (ret < 0) {
- /* There were no snapshots before this call; so on error, just
- * blindly delete anything created before the failure. */
- virHashRemoveAll(snapshots->objs);
- snapshots->metaroot.nchildren = 0;
- snapshots->metaroot.first_child = NULL;
- }
- xmlXPathFreeContext(ctxt);
- xmlFreeDoc(xml);
- xmlKeepBlanksDefault(keepBlanksDefault);
- return ret;
-}
-
-
/**
* virDomainSnapshotDefAssignExternalNames:
* @def: snapshot def object
@@ -1001,406 +884,6 @@ virDomainSnapshotDefFormat(const char *uuidstr,
}
-/* Struct and callback function used as a hash table callback; each call
- * appends another snapshot XML to buf, with the caller clearing the
- * buffer if any callback fails. */
-struct virDomainSnapshotFormatData {
- virBufferPtr buf;
- const char *uuidstr;
- virCapsPtr caps;
- virDomainXMLOptionPtr xmlopt;
- unsigned int flags;
-};
-
-static int
-virDomainSnapshotFormatOne(void *payload,
- const void *name ATTRIBUTE_UNUSED,
- void *opaque)
-{
- virDomainSnapshotObjPtr snap = payload;
- struct virDomainSnapshotFormatData *data = opaque;
- return virDomainSnapshotDefFormatInternal(data->buf, data->uuidstr,
- snap->def, data->caps,
- data->xmlopt, data->flags);
-}
-
-
-/* Format the XML for all snapshots in the list into buf. On error,
- * clear the buffer and return -1. */
-int
-virDomainSnapshotObjListFormat(virBufferPtr buf,
- const char *uuidstr,
- virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr current_snapshot,
- virCapsPtr caps,
- virDomainXMLOptionPtr xmlopt,
- unsigned int flags)
-{
- struct virDomainSnapshotFormatData data = {
- .buf = buf,
- .uuidstr = uuidstr,
- .caps = caps,
- .xmlopt = xmlopt,
- .flags = flags,
- };
-
- virBufferAddLit(buf, "<snapshots");
- if (current_snapshot)
- virBufferEscapeString(buf, " current='%s'",
- current_snapshot->def->name);
- virBufferAddLit(buf, ">\n");
- virBufferAdjustIndent(buf, 2);
- if (virDomainSnapshotForEach(snapshots, virDomainSnapshotFormatOne,
- &data) < 0) {
- virBufferFreeAndReset(buf);
- return -1;
- }
- virBufferAdjustIndent(buf, -2);
- virBufferAddLit(buf, "</snapshots>\n");
- return 0;
-}
-
-
-/* Snapshot Obj functions */
-static virDomainSnapshotObjPtr virDomainSnapshotObjNew(void)
-{
- virDomainSnapshotObjPtr snapshot;
-
- if (VIR_ALLOC(snapshot) < 0)
- return NULL;
-
- VIR_DEBUG("obj=%p", snapshot);
-
- return snapshot;
-}
-
-static void virDomainSnapshotObjFree(virDomainSnapshotObjPtr snapshot)
-{
- if (!snapshot)
- return;
-
- VIR_DEBUG("obj=%p", snapshot);
-
- virDomainSnapshotDefFree(snapshot->def);
- VIR_FREE(snapshot);
-}
-
-virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotDefPtr def)
-{
- virDomainSnapshotObjPtr snap;
-
- if (virHashLookup(snapshots->objs, def->name) != NULL) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("unexpected domain snapshot %s already exists"),
- def->name);
- return NULL;
- }
-
- if (!(snap = virDomainSnapshotObjNew()))
- return NULL;
- snap->def = def;
-
- if (virHashAddEntry(snapshots->objs, snap->def->name, snap) < 0) {
- VIR_FREE(snap);
- return NULL;
- }
-
- return snap;
-}
-
-/* Snapshot Obj List functions */
-static void
-virDomainSnapshotObjListDataFree(void *payload,
- const void *name ATTRIBUTE_UNUSED)
-{
- virDomainSnapshotObjPtr obj = payload;
-
- virDomainSnapshotObjFree(obj);
-}
-
-virDomainSnapshotObjListPtr
-virDomainSnapshotObjListNew(void)
-{
- virDomainSnapshotObjListPtr snapshots;
- if (VIR_ALLOC(snapshots) < 0)
- return NULL;
- snapshots->objs = virHashCreate(50, virDomainSnapshotObjListDataFree);
- if (!snapshots->objs) {
- VIR_FREE(snapshots);
- return NULL;
- }
- return snapshots;
-}
-
-void
-virDomainSnapshotObjListFree(virDomainSnapshotObjListPtr snapshots)
-{
- if (!snapshots)
- return;
- virHashFree(snapshots->objs);
- VIR_FREE(snapshots);
-}
-
-struct virDomainSnapshotNameData {
- char **const names;
- int maxnames;
- unsigned int flags;
- int count;
- bool error;
-};
-
-static int virDomainSnapshotObjListCopyNames(void *payload,
- const void *name ATTRIBUTE_UNUSED,
- void *opaque)
-{
- virDomainSnapshotObjPtr obj = payload;
- struct virDomainSnapshotNameData *data = opaque;
-
- if (data->error)
- return 0;
- /* Caller already sanitized flags. Filtering on DESCENDANTS was
- * done by choice of iteration in the caller. */
- if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_LEAVES) && obj->nchildren)
- return 0;
- if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_NO_LEAVES) && !obj->nchildren)
- return 0;
-
- if (data->flags & VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS) {
- if (!(data->flags & VIR_DOMAIN_SNAPSHOT_LIST_INACTIVE) &&
- obj->def->state == VIR_DOMAIN_SNAPSHOT_SHUTOFF)
- return 0;
- if (!(data->flags & VIR_DOMAIN_SNAPSHOT_LIST_DISK_ONLY) &&
- obj->def->state == VIR_DOMAIN_SNAPSHOT_DISK_SNAPSHOT)
- return 0;
- if (!(data->flags & VIR_DOMAIN_SNAPSHOT_LIST_ACTIVE) &&
- obj->def->state != VIR_DOMAIN_SNAPSHOT_SHUTOFF &&
- obj->def->state != VIR_DOMAIN_SNAPSHOT_DISK_SNAPSHOT)
- return 0;
- }
-
- if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_INTERNAL) &&
- virDomainSnapshotIsExternal(obj))
- return 0;
- if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL) &&
- !virDomainSnapshotIsExternal(obj))
- return 0;
-
- if (data->names && data->count < data->maxnames &&
- VIR_STRDUP(data->names[data->count], obj->def->name) < 0) {
- data->error = true;
- return 0;
- }
- data->count++;
- return 0;
-}
-
-int
-virDomainSnapshotObjListGetNames(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr from,
- char **const names, int maxnames,
- unsigned int flags)
-{
- struct virDomainSnapshotNameData data = { names, maxnames, flags, 0,
- false };
- size_t i;
-
- if (!from) {
- /* LIST_ROOTS and LIST_DESCENDANTS have the same bit value,
- * but opposite semantics. Toggle here to get the correct
- * traversal on the metaroot. */
- flags ^= VIR_DOMAIN_SNAPSHOT_LIST_ROOTS;
- from = &snapshots->metaroot;
- }
-
- /* We handle LIST_ROOT/LIST_DESCENDANTS and LIST_TOPOLOGICAL directly,
- * mask those bits out to determine when we must use the filter callback. */
- data.flags &= ~(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
- VIR_DOMAIN_SNAPSHOT_LIST_TOPOLOGICAL);
-
- /* If this common code is being used, we assume that all snapshots
- * have metadata, and thus can handle METADATA up front as an
- * all-or-none filter. XXX This might not always be true, if we
- * add the ability to track qcow2 internal snapshots without the
- * use of metadata. */
- if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_METADATA) ==
- VIR_DOMAIN_SNAPSHOT_LIST_NO_METADATA)
- return 0;
- data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_METADATA;
-
- /* For ease of coding the visitor, it is easier to zero each group
- * where all of the bits are set. */
- if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_LEAVES) ==
- VIR_DOMAIN_SNAPSHOT_FILTERS_LEAVES)
- data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_LEAVES;
- if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS) ==
- VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS)
- data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS;
- if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION) ==
- VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION)
- data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION;
-
- if (flags & VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS) {
- /* We could just always do a topological visit; but it is
- * possible to optimize for less stack usage and time when a
- * simpler full hashtable visit or counter will do. */
- if (from->def || (names &&
- (flags & VIR_DOMAIN_SNAPSHOT_LIST_TOPOLOGICAL)))
- virDomainSnapshotForEachDescendant(from,
- virDomainSnapshotObjListCopyNames,
- &data);
- else if (names || data.flags)
- virHashForEach(snapshots->objs, virDomainSnapshotObjListCopyNames,
- &data);
- else
- data.count = virHashSize(snapshots->objs);
- } else if (names || data.flags) {
- virDomainSnapshotForEachChild(from,
- virDomainSnapshotObjListCopyNames, &data);
- } else {
- data.count = from->nchildren;
- }
-
- if (data.error) {
- for (i = 0; i < data.count; i++)
- VIR_FREE(names[i]);
- return -1;
- }
-
- return data.count;
-}
-
-int
-virDomainSnapshotObjListNum(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr from,
- unsigned int flags)
-{
- return virDomainSnapshotObjListGetNames(snapshots, from, NULL, 0, flags);
-}
-
-virDomainSnapshotObjPtr
-virDomainSnapshotFindByName(virDomainSnapshotObjListPtr snapshots,
- const char *name)
-{
- return name ? virHashLookup(snapshots->objs, name) : &snapshots->metaroot;
-}
-
-void virDomainSnapshotObjListRemove(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr snapshot)
-{
- virHashRemoveEntry(snapshots->objs, snapshot->def->name);
-}
-
-int
-virDomainSnapshotForEach(virDomainSnapshotObjListPtr snapshots,
- virHashIterator iter,
- void *data)
-{
- return virHashForEach(snapshots->objs, iter, data);
-}
-
-
-/* Struct and callback function used as a hash table callback; each call
- * inspects the pre-existing snapshot->def->parent field, and adjusts
- * the snapshot->parent field as well as the parent's child fields to
- * wire up the hierarchical relations for the given snapshot. The error
- * indicator gets set if a parent is missing or a requested parent would
- * cause a circular parent chain. */
-struct snapshot_set_relation {
- virDomainSnapshotObjListPtr snapshots;
- int err;
-};
-static int
-virDomainSnapshotSetRelations(void *payload,
- const void *name ATTRIBUTE_UNUSED,
- void *data)
-{
- virDomainSnapshotObjPtr obj = payload;
- struct snapshot_set_relation *curr = data;
- virDomainSnapshotObjPtr tmp;
-
- obj->parent = virDomainSnapshotFindByName(curr->snapshots,
- obj->def->parent);
- if (!obj->parent) {
- curr->err = -1;
- obj->parent = &curr->snapshots->metaroot;
- VIR_WARN("snapshot %s lacks parent", obj->def->name);
- } else {
- tmp = obj->parent;
- while (tmp && tmp->def) {
- if (tmp == obj) {
- curr->err = -1;
- obj->parent = &curr->snapshots->metaroot;
- VIR_WARN("snapshot %s in circular chain", obj->def->name);
- break;
- }
- tmp = tmp->parent;
- }
- }
- obj->parent->nchildren++;
- obj->sibling = obj->parent->first_child;
- obj->parent->first_child = obj;
- return 0;
-}
-
-/* Populate parent link and child count of all snapshots, with all
- * assigned defs having relations starting as 0/NULL. Return 0 on
- * success, -1 if a parent is missing or if a circular relationship
- * was requested. */
-int
-virDomainSnapshotUpdateRelations(virDomainSnapshotObjListPtr snapshots)
-{
- struct snapshot_set_relation act = { snapshots, 0 };
-
- snapshots->metaroot.nchildren = 0;
- snapshots->metaroot.first_child = NULL;
- virHashForEach(snapshots->objs, virDomainSnapshotSetRelations, &act);
- return act.err;
-}
-
-
-int
-virDomainListSnapshots(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr from,
- virDomainPtr dom,
- virDomainSnapshotPtr **snaps,
- unsigned int flags)
-{
- int count = virDomainSnapshotObjListNum(snapshots, from, flags);
- virDomainSnapshotPtr *list = NULL;
- char **names;
- int ret = -1;
- size_t i;
-
- if (!snaps || count < 0)
- return count;
- if (VIR_ALLOC_N(names, count) < 0 ||
- VIR_ALLOC_N(list, count + 1) < 0)
- goto cleanup;
-
- if (virDomainSnapshotObjListGetNames(snapshots, from, names, count,
- flags) < 0)
- goto cleanup;
- for (i = 0; i < count; i++)
- if ((list[i] = virGetDomainSnapshot(dom, names[i])) == NULL)
- goto cleanup;
-
- ret = count;
- *snaps = list;
-
- cleanup:
- for (i = 0; i < count; i++)
- VIR_FREE(names[i]);
- VIR_FREE(names);
- if (ret < 0 && list) {
- for (i = 0; i < count; i++)
- virObjectUnref(list[i]);
- VIR_FREE(list);
- }
- return ret;
-}
-
-
bool
virDomainSnapshotDefIsExternal(virDomainSnapshotDefPtr def)
{
diff --git a/src/conf/virdomainobjlist.c b/src/conf/virdomainobjlist.c
index 7742de94f2..a814fc10a3 100644
--- a/src/conf/virdomainobjlist.c
+++ b/src/conf/virdomainobjlist.c
@@ -30,6 +30,7 @@
#include "virfile.h"
#include "virlog.h"
#include "virstring.h"
+#include "virdomainsnapshotobjlist.h"
#define VIR_FROM_THIS VIR_FROM_DOMAIN
diff --git a/src/conf/virdomainsnapshotobj.c b/src/conf/virdomainsnapshotobj.c
index 487f0cc702..7f92ac21d9 100644
--- a/src/conf/virdomainsnapshotobj.c
+++ b/src/conf/virdomainsnapshotobj.c
@@ -25,6 +25,7 @@
#include "internal.h"
#include "virdomainsnapshotobj.h"
#include "snapshot_conf.h"
+#include "virdomainsnapshotobjlist.h"
#include "virlog.h"
#include "virerror.h"
diff --git a/src/conf/virdomainsnapshotobjlist.c b/src/conf/virdomainsnapshotobjlist.c
new file mode 100644
index 0000000000..e2f2110108
--- /dev/null
+++ b/src/conf/virdomainsnapshotobjlist.c
@@ -0,0 +1,553 @@
+/*
+ * virdomainsnapshotobjlist.c: handle a tree of snapshot objects
+ * (derived from snapshot_conf.c)
+ *
+ * Copyright (C) 2006-2019 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 "internal.h"
+#include "virdomainsnapshotobjlist.h"
+#include "snapshot_conf.h"
+#include "virlog.h"
+#include "virerror.h"
+#include "datatypes.h"
+#include "virstring.h"
+
+#define VIR_FROM_THIS VIR_FROM_DOMAIN_SNAPSHOT
+
+VIR_LOG_INIT("conf.virdomainsnapshotobjlist");
+
+struct _virDomainSnapshotObjList {
+ /* name string -> virDomainSnapshotObj mapping
+ * for O(1), lockless lookup-by-name */
+ virHashTable *objs;
+
+ virDomainSnapshotObj metaroot; /* Special parent of all root snapshots */
+};
+
+
+/* Parse a <snapshots> XML entry into snapshots, which must start empty.
+ * Any <domain> sub-elements of a <domainsnapshot> must match domain_uuid.
+ */
+int
+virDomainSnapshotObjListParse(const char *xmlStr,
+ const unsigned char *domain_uuid,
+ virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr *current_snap,
+ virCapsPtr caps,
+ virDomainXMLOptionPtr xmlopt,
+ unsigned int flags)
+{
+ int ret = -1;
+ xmlDocPtr xml;
+ xmlNodePtr root;
+ xmlXPathContextPtr ctxt = NULL;
+ int n;
+ size_t i;
+ int keepBlanksDefault = xmlKeepBlanksDefault(0);
+ VIR_AUTOFREE(xmlNodePtr *) nodes = NULL;
+ VIR_AUTOFREE(char *) current = NULL;
+
+ if (!(flags & VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE) ||
+ (flags & VIR_DOMAIN_SNAPSHOT_PARSE_INTERNAL)) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("incorrect flags for bulk parse"));
+ return -1;
+ }
+ if (snapshots->metaroot.nchildren || *current_snap) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("bulk define of snapshots only possible with "
+ "no existing snapshot"));
+ return -1;
+ }
+
+ if (!(xml = virXMLParse(NULL, xmlStr, _("(domain_snapshot)"))))
+ return -1;
+
+ root = xmlDocGetRootElement(xml);
+ if (!virXMLNodeNameEqual(root, "snapshots")) {
+ virReportError(VIR_ERR_XML_ERROR,
+ _("unexpected root element <%s>, "
+ "expecting <snapshots>"), root->name);
+ goto cleanup;
+ }
+ ctxt = xmlXPathNewContext(xml);
+ if (ctxt == NULL) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ ctxt->node = root;
+ current = virXMLPropString(root, "current");
+
+ if ((n = virXPathNodeSet("./domainsnapshot", ctxt, &nodes)) < 0)
+ goto cleanup;
+ if (!n) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("expected at least one <domainsnapshot> child"));
+ goto cleanup;
+ }
+
+ for (i = 0; i < n; i++) {
+ virDomainSnapshotDefPtr def;
+ virDomainSnapshotObjPtr snap;
+
+ def = virDomainSnapshotDefParseNode(xml, nodes[i], caps, xmlopt, flags);
+ if (!def)
+ goto cleanup;
+ if (!(snap = virDomainSnapshotAssignDef(snapshots, def))) {
+ virDomainSnapshotDefFree(def);
+ goto cleanup;
+ }
+ if (virDomainSnapshotRedefineValidate(def, domain_uuid, NULL, NULL,
+ flags) < 0)
+ goto cleanup;
+ }
+
+ if (virDomainSnapshotUpdateRelations(snapshots) < 0) {
+ virReportError(VIR_ERR_XML_ERROR, "%s",
+ _("<snapshots> contains inconsistent parent-child "
+ "relationships"));
+ goto cleanup;
+ }
+
+ if (current) {
+ if (!(*current_snap = virDomainSnapshotFindByName(snapshots,
+ current))) {
+ virReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
+ _("no snapshot matching current='%s'"), current);
+ goto cleanup;
+ }
+ (*current_snap)->def->current = true;
+ }
+
+ ret = 0;
+ cleanup:
+ if (ret < 0) {
+ /* There were no snapshots before this call; so on error, just
+ * blindly delete anything created before the failure. */
+ virHashRemoveAll(snapshots->objs);
+ snapshots->metaroot.nchildren = 0;
+ snapshots->metaroot.first_child = NULL;
+ }
+ xmlXPathFreeContext(ctxt);
+ xmlFreeDoc(xml);
+ xmlKeepBlanksDefault(keepBlanksDefault);
+ return ret;
+}
+
+
+/* Struct and callback function used as a hash table callback; each call
+ * appends another snapshot XML to buf, with the caller clearing the
+ * buffer if any callback fails. */
+struct virDomainSnapshotFormatData {
+ virBufferPtr buf;
+ const char *uuidstr;
+ virCapsPtr caps;
+ virDomainXMLOptionPtr xmlopt;
+ unsigned int flags;
+};
+
+static int
+virDomainSnapshotFormatOne(void *payload,
+ const void *name ATTRIBUTE_UNUSED,
+ void *opaque)
+{
+ virDomainSnapshotObjPtr snap = payload;
+ struct virDomainSnapshotFormatData *data = opaque;
+ return virDomainSnapshotDefFormatInternal(data->buf, data->uuidstr,
+ snap->def, data->caps,
+ data->xmlopt, data->flags);
+}
+
+
+/* Format the XML for all snapshots in the list into buf. On error,
+ * clear the buffer and return -1. */
+int
+virDomainSnapshotObjListFormat(virBufferPtr buf,
+ const char *uuidstr,
+ virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr current_snapshot,
+ virCapsPtr caps,
+ virDomainXMLOptionPtr xmlopt,
+ unsigned int flags)
+{
+ struct virDomainSnapshotFormatData data = {
+ .buf = buf,
+ .uuidstr = uuidstr,
+ .caps = caps,
+ .xmlopt = xmlopt,
+ .flags = flags,
+ };
+
+ virBufferAddLit(buf, "<snapshots");
+ if (current_snapshot)
+ virBufferEscapeString(buf, " current='%s'",
+ current_snapshot->def->name);
+ virBufferAddLit(buf, ">\n");
+ virBufferAdjustIndent(buf, 2);
+ if (virDomainSnapshotForEach(snapshots, virDomainSnapshotFormatOne,
+ &data) < 0) {
+ virBufferFreeAndReset(buf);
+ return -1;
+ }
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</snapshots>\n");
+ return 0;
+}
+
+
+/* Snapshot Obj functions */
+static virDomainSnapshotObjPtr virDomainSnapshotObjNew(void)
+{
+ virDomainSnapshotObjPtr snapshot;
+
+ if (VIR_ALLOC(snapshot) < 0)
+ return NULL;
+
+ VIR_DEBUG("obj=%p", snapshot);
+
+ return snapshot;
+}
+
+static void virDomainSnapshotObjFree(virDomainSnapshotObjPtr snapshot)
+{
+ if (!snapshot)
+ return;
+
+ VIR_DEBUG("obj=%p", snapshot);
+
+ virDomainSnapshotDefFree(snapshot->def);
+ VIR_FREE(snapshot);
+}
+
+virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotDefPtr def)
+{
+ virDomainSnapshotObjPtr snap;
+
+ if (virHashLookup(snapshots->objs, def->name) != NULL) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unexpected domain snapshot %s already exists"),
+ def->name);
+ return NULL;
+ }
+
+ if (!(snap = virDomainSnapshotObjNew()))
+ return NULL;
+ snap->def = def;
+
+ if (virHashAddEntry(snapshots->objs, snap->def->name, snap) < 0) {
+ VIR_FREE(snap);
+ return NULL;
+ }
+
+ return snap;
+}
+
+/* Snapshot Obj List functions */
+static void
+virDomainSnapshotObjListDataFree(void *payload,
+ const void *name ATTRIBUTE_UNUSED)
+{
+ virDomainSnapshotObjPtr obj = payload;
+
+ virDomainSnapshotObjFree(obj);
+}
+
+virDomainSnapshotObjListPtr
+virDomainSnapshotObjListNew(void)
+{
+ virDomainSnapshotObjListPtr snapshots;
+ if (VIR_ALLOC(snapshots) < 0)
+ return NULL;
+ snapshots->objs = virHashCreate(50, virDomainSnapshotObjListDataFree);
+ if (!snapshots->objs) {
+ VIR_FREE(snapshots);
+ return NULL;
+ }
+ return snapshots;
+}
+
+void
+virDomainSnapshotObjListFree(virDomainSnapshotObjListPtr snapshots)
+{
+ if (!snapshots)
+ return;
+ virHashFree(snapshots->objs);
+ VIR_FREE(snapshots);
+}
+
+struct virDomainSnapshotNameData {
+ char **const names;
+ int maxnames;
+ unsigned int flags;
+ int count;
+ bool error;
+};
+
+static int virDomainSnapshotObjListCopyNames(void *payload,
+ const void *name ATTRIBUTE_UNUSED,
+ void *opaque)
+{
+ virDomainSnapshotObjPtr obj = payload;
+ struct virDomainSnapshotNameData *data = opaque;
+
+ if (data->error)
+ return 0;
+ /* Caller already sanitized flags. Filtering on DESCENDANTS was
+ * done by choice of iteration in the caller. */
+ if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_LEAVES) && obj->nchildren)
+ return 0;
+ if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_NO_LEAVES) && !obj->nchildren)
+ return 0;
+
+ if (data->flags & VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS) {
+ if (!(data->flags & VIR_DOMAIN_SNAPSHOT_LIST_INACTIVE) &&
+ obj->def->state == VIR_DOMAIN_SNAPSHOT_SHUTOFF)
+ return 0;
+ if (!(data->flags & VIR_DOMAIN_SNAPSHOT_LIST_DISK_ONLY) &&
+ obj->def->state == VIR_DOMAIN_SNAPSHOT_DISK_SNAPSHOT)
+ return 0;
+ if (!(data->flags & VIR_DOMAIN_SNAPSHOT_LIST_ACTIVE) &&
+ obj->def->state != VIR_DOMAIN_SNAPSHOT_SHUTOFF &&
+ obj->def->state != VIR_DOMAIN_SNAPSHOT_DISK_SNAPSHOT)
+ return 0;
+ }
+
+ if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_INTERNAL) &&
+ virDomainSnapshotIsExternal(obj))
+ return 0;
+ if ((data->flags & VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL) &&
+ !virDomainSnapshotIsExternal(obj))
+ return 0;
+
+ if (data->names && data->count < data->maxnames &&
+ VIR_STRDUP(data->names[data->count], obj->def->name) < 0) {
+ data->error = true;
+ return 0;
+ }
+ data->count++;
+ return 0;
+}
+
+int
+virDomainSnapshotObjListGetNames(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr from,
+ char **const names, int maxnames,
+ unsigned int flags)
+{
+ struct virDomainSnapshotNameData data = { names, maxnames, flags, 0,
+ false };
+ size_t i;
+
+ if (!from) {
+ /* LIST_ROOTS and LIST_DESCENDANTS have the same bit value,
+ * but opposite semantics. Toggle here to get the correct
+ * traversal on the metaroot. */
+ flags ^= VIR_DOMAIN_SNAPSHOT_LIST_ROOTS;
+ from = &snapshots->metaroot;
+ }
+
+ /* We handle LIST_ROOT/LIST_DESCENDANTS and LIST_TOPOLOGICAL directly,
+ * mask those bits out to determine when we must use the filter callback. */
+ data.flags &= ~(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
+ VIR_DOMAIN_SNAPSHOT_LIST_TOPOLOGICAL);
+
+ /* If this common code is being used, we assume that all snapshots
+ * have metadata, and thus can handle METADATA up front as an
+ * all-or-none filter. XXX This might not always be true, if we
+ * add the ability to track qcow2 internal snapshots without the
+ * use of metadata. */
+ if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_METADATA) ==
+ VIR_DOMAIN_SNAPSHOT_LIST_NO_METADATA)
+ return 0;
+ data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_METADATA;
+
+ /* For ease of coding the visitor, it is easier to zero each group
+ * where all of the bits are set. */
+ if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_LEAVES) ==
+ VIR_DOMAIN_SNAPSHOT_FILTERS_LEAVES)
+ data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_LEAVES;
+ if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS) ==
+ VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS)
+ data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_STATUS;
+ if ((data.flags & VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION) ==
+ VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION)
+ data.flags &= ~VIR_DOMAIN_SNAPSHOT_FILTERS_LOCATION;
+
+ if (flags & VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS) {
+ /* We could just always do a topological visit; but it is
+ * possible to optimize for less stack usage and time when a
+ * simpler full hashtable visit or counter will do. */
+ if (from->def || (names &&
+ (flags & VIR_DOMAIN_SNAPSHOT_LIST_TOPOLOGICAL)))
+ virDomainSnapshotForEachDescendant(from,
+ virDomainSnapshotObjListCopyNames,
+ &data);
+ else if (names || data.flags)
+ virHashForEach(snapshots->objs, virDomainSnapshotObjListCopyNames,
+ &data);
+ else
+ data.count = virHashSize(snapshots->objs);
+ } else if (names || data.flags) {
+ virDomainSnapshotForEachChild(from,
+ virDomainSnapshotObjListCopyNames, &data);
+ } else {
+ data.count = from->nchildren;
+ }
+
+ if (data.error) {
+ for (i = 0; i < data.count; i++)
+ VIR_FREE(names[i]);
+ return -1;
+ }
+
+ return data.count;
+}
+
+int
+virDomainSnapshotObjListNum(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr from,
+ unsigned int flags)
+{
+ return virDomainSnapshotObjListGetNames(snapshots, from, NULL, 0, flags);
+}
+
+virDomainSnapshotObjPtr
+virDomainSnapshotFindByName(virDomainSnapshotObjListPtr snapshots,
+ const char *name)
+{
+ return name ? virHashLookup(snapshots->objs, name) : &snapshots->metaroot;
+}
+
+void virDomainSnapshotObjListRemove(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr snapshot)
+{
+ virHashRemoveEntry(snapshots->objs, snapshot->def->name);
+}
+
+int
+virDomainSnapshotForEach(virDomainSnapshotObjListPtr snapshots,
+ virHashIterator iter,
+ void *data)
+{
+ return virHashForEach(snapshots->objs, iter, data);
+}
+
+
+/* Struct and callback function used as a hash table callback; each call
+ * inspects the pre-existing snapshot->def->parent field, and adjusts
+ * the snapshot->parent field as well as the parent's child fields to
+ * wire up the hierarchical relations for the given snapshot. The error
+ * indicator gets set if a parent is missing or a requested parent would
+ * cause a circular parent chain. */
+struct snapshot_set_relation {
+ virDomainSnapshotObjListPtr snapshots;
+ int err;
+};
+static int
+virDomainSnapshotSetRelations(void *payload,
+ const void *name ATTRIBUTE_UNUSED,
+ void *data)
+{
+ virDomainSnapshotObjPtr obj = payload;
+ struct snapshot_set_relation *curr = data;
+ virDomainSnapshotObjPtr tmp;
+
+ obj->parent = virDomainSnapshotFindByName(curr->snapshots,
+ obj->def->parent);
+ if (!obj->parent) {
+ curr->err = -1;
+ obj->parent = &curr->snapshots->metaroot;
+ VIR_WARN("snapshot %s lacks parent", obj->def->name);
+ } else {
+ tmp = obj->parent;
+ while (tmp && tmp->def) {
+ if (tmp == obj) {
+ curr->err = -1;
+ obj->parent = &curr->snapshots->metaroot;
+ VIR_WARN("snapshot %s in circular chain", obj->def->name);
+ break;
+ }
+ tmp = tmp->parent;
+ }
+ }
+ obj->parent->nchildren++;
+ obj->sibling = obj->parent->first_child;
+ obj->parent->first_child = obj;
+ return 0;
+}
+
+/* Populate parent link and child count of all snapshots, with all
+ * assigned defs having relations starting as 0/NULL. Return 0 on
+ * success, -1 if a parent is missing or if a circular relationship
+ * was requested. */
+int
+virDomainSnapshotUpdateRelations(virDomainSnapshotObjListPtr snapshots)
+{
+ struct snapshot_set_relation act = { snapshots, 0 };
+
+ snapshots->metaroot.nchildren = 0;
+ snapshots->metaroot.first_child = NULL;
+ virHashForEach(snapshots->objs, virDomainSnapshotSetRelations, &act);
+ return act.err;
+}
+
+
+int
+virDomainListSnapshots(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr from,
+ virDomainPtr dom,
+ virDomainSnapshotPtr **snaps,
+ unsigned int flags)
+{
+ int count = virDomainSnapshotObjListNum(snapshots, from, flags);
+ virDomainSnapshotPtr *list = NULL;
+ char **names;
+ int ret = -1;
+ size_t i;
+
+ if (!snaps || count < 0)
+ return count;
+ if (VIR_ALLOC_N(names, count) < 0 ||
+ VIR_ALLOC_N(list, count + 1) < 0)
+ goto cleanup;
+
+ if (virDomainSnapshotObjListGetNames(snapshots, from, names, count,
+ flags) < 0)
+ goto cleanup;
+ for (i = 0; i < count; i++)
+ if ((list[i] = virGetDomainSnapshot(dom, names[i])) == NULL)
+ goto cleanup;
+
+ ret = count;
+ *snaps = list;
+
+ cleanup:
+ for (i = 0; i < count; i++)
+ VIR_FREE(names[i]);
+ VIR_FREE(names);
+ if (ret < 0 && list) {
+ for (i = 0; i < count; i++)
+ virObjectUnref(list[i]);
+ VIR_FREE(list);
+ }
+ return ret;
+}
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d775fe8551..758ec9f102 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -883,30 +883,18 @@ virSecretEventValueChangedNew;
# conf/snapshot_conf.h
-virDomainListSnapshots;
virDomainSnapshotAlignDisks;
-virDomainSnapshotAssignDef;
virDomainSnapshotDefFormat;
virDomainSnapshotDefFree;
virDomainSnapshotDefIsExternal;
virDomainSnapshotDefParseString;
-virDomainSnapshotFindByName;
-virDomainSnapshotForEach;
virDomainSnapshotFormatConvertXMLFlags;
virDomainSnapshotIsExternal;
virDomainSnapshotLocationTypeFromString;
virDomainSnapshotLocationTypeToString;
-virDomainSnapshotObjListFormat;
-virDomainSnapshotObjListFree;
-virDomainSnapshotObjListGetNames;
-virDomainSnapshotObjListNew;
-virDomainSnapshotObjListNum;
-virDomainSnapshotObjListParse;
-virDomainSnapshotObjListRemove;
virDomainSnapshotRedefinePrep;
virDomainSnapshotStateTypeFromString;
virDomainSnapshotStateTypeToString;
-virDomainSnapshotUpdateRelations;
# conf/storage_adapter_conf.h
@@ -995,6 +983,21 @@ virDomainSnapshotForEachChild;
virDomainSnapshotForEachDescendant;
+# conf/virdomainsnapshotobjlist.h
+virDomainListSnapshots;
+virDomainSnapshotAssignDef;
+virDomainSnapshotFindByName;
+virDomainSnapshotForEach;
+virDomainSnapshotObjListFormat;
+virDomainSnapshotObjListFree;
+virDomainSnapshotObjListGetNames;
+virDomainSnapshotObjListNew;
+virDomainSnapshotObjListNum;
+virDomainSnapshotObjListParse;
+virDomainSnapshotObjListRemove;
+virDomainSnapshotUpdateRelations;
+
+
# conf/virinterfaceobj.h
virInterfaceObjEndAPI;
virInterfaceObjGetDef;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 1b82b70cc1..d2525c289a 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -58,6 +58,7 @@
#include "virnuma.h"
#include "virgic.h"
#include "virmdev.h"
+#include "virdomainsnapshotobjlist.h"
#if defined(__linux__)
# include <linux/capability.h>
#endif
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 6a7a8e102b..86e80391e1 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -55,6 +55,7 @@
#include "secret_util.h"
#include "logging/log_manager.h"
#include "locking/domain_lock.h"
+#include "virdomainsnapshotobjlist.h"
#ifdef MAJOR_IN_MKDEV
# include <sys/mkdev.h>
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index e461fb51b0..75b5b26bca 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -101,6 +101,7 @@
#include "dirname.h"
#include "netdev_bandwidth_conf.h"
#include "virqemu.h"
+#include "virdomainsnapshotobjlist.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 362b79e567..cb44081134 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -60,6 +60,7 @@
#include "virtypedparam.h"
#include "virprocess.h"
#include "nwfilter_conf.h"
+#include "virdomainsnapshotobjlist.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index 02cd4f4d07..4d49c987b5 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -63,6 +63,7 @@
#include "virdomainobjlist.h"
#include "virinterfaceobj.h"
#include "virhostcpu.h"
+#include "virdomainsnapshotobjlist.h"
#define VIR_FROM_THIS VIR_FROM_TEST
--
2.20.1
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