10 a.m.
Hello,
I just encountered a problem with the current snapshot implementation for
qemu/kvm: To revert back to a snapshot, the domain description must closely
match the domain description when the snapshot was created. If the ram-size
doesn't match or the VM now contains fewer CPUs or contains additional disks,
kvm will either not load the snapshot or the machine will be broken
afterwarts.
Is this a known problem?
Without looking into the implementation details I think saving the full domain
description instead of just a reference to the domain uuid as part of the
snapshot description would work better. Or am I supposed to save the domain
description myself in addition the the data saved
in /var/lib/libvirt/qemu/snapshot/$DOMAIN_NAME/$SNAPSHOT_NAME.xml. I think
this is very important feature, because when you - for example - notice that
you need additional disk space and would like to include an additional block
device, this is your ideal time to take a snapshot you can revert to when you
do something wrong.
Looking at VMware I see that reverting a VM there will not only revert the
disks and ram back to the saved state, but also the description including
name, ram size, etc.
Any comment or advise is appreciated.
Sincerely
Philipp Hahn
--
Philipp Hahn Open Source Software Engineer hahn(a)univention.de
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 28359 Bremen fax: +49 421 22 232-99
http://www.univention.de
4:04 a.m.
Hello,
to refresh this old question again:
Snapshots are a great feature, but I encountered a problem with Qemu/KVM: The
snapshot information does not include the domain description, which breaks
the following work-flow:
1. create and start domain with RAM=x1, CPU=y1, ...
2. take snapshot
3. shutdown domain
4. edit domain to RAM=x2, CPU=y2, ...
5. start domain and restore previous snapshot
Qemu will start the domain, but will fail to load the saved RAM state:
qemu: warning: error while loading state for instance 0x0 of device
'ram'
For comparison, VMWare also includes the configuration in the snapshot data
(see the *.vmsn file), so on restore the right configuration and state of
mass storage and RAM are restored.
I think the domain XML should be included with the snapshot data, so restoring
the exact machine is possible. On restore there would be two cases, when
restoring a live vm:
1. when the already running qemu/kvm-process is compatible with the VM to be
restored, reuse the running process and issue the loadvm (or what ever).
2. if they are incompatible, kill the running kvm process and start a new one
with the right setup to load the VM state.
Is someone working on fixing the problem or are there any plans to fix that?
Sincerely
Philipp
--
Philipp Hahn Open Source Software Engineer hahn(a)univention.de
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 28359 Bremen fax: +49 421 22 232-99
http://www.univention.de/
** Besuchen Sie uns auf der CeBIT in Hannover **
** Auf dem Univention Stand D36 in Halle 2 **
** Vom 01. bis 05. März 2011 **
4:39 p.m.
On 12/07/2010 09:00 AM, Philipp Hahn wrote:
Hello,
I just encountered a problem with the current snapshot implementation for
qemu/kvm: To revert back to a snapshot, the domain description must closely
match the domain description when the snapshot was created. If the ram-size
doesn't match or the VM now contains fewer CPUs or contains additional disks,
kvm will either not load the snapshot or the machine will be broken
afterwarts.
Is this a known problem?
Are you referring to a disk snapshot, created via 'virsh snapshot' on a
qcow2 image, or a memory snapshot, created via 'virsh save'? The latter
_does_ save the guest XML as part of the snapshot, and 'virsh restore'
uses that saved XML rather than the current domain definition to resume
the guest.
Without looking into the implementation details I think saving the full domain
description instead of just a reference to the domain uuid as part of the
snapshot description would work better.
So it sounds like you are talking about the 'virsh snapshot' family of
commands. Indeed, there's probably quite a bit of work to do in that
code to make it more reliable.
Or am I supposed to save the domain
description myself in addition the the data saved
in /var/lib/libvirt/qemu/snapshot/$DOMAIN_NAME/$SNAPSHOT_NAME.xml. I think
this is very important feature, because when you - for example - notice that
you need additional disk space and would like to include an additional block
device, this is your ideal time to take a snapshot you can revert to when you
do something wrong.
I think we are hitting on more fundamental issues. Right now, the
'virsh snapshot' family of commands is geared towards qcow2 images, and
relies heavily on the qcow2 internal snapshotting feature. It would be
nice to enhance that to support other means of snapshotting (such as raw
disk images stored on an lvm partition or using btrfs file cloning), as
well as making live snapshots possible (by capturing memory as well as
disk images, or even coordinating with the guest to quiesce its file
systems so that restoring from a snapshot is less likely to restore a
file system in an inconsistent state).
Looking at VMware I see that reverting a VM there will not only revert the
disks and ram back to the saved state, but also the description including
name, ram size, etc.
Any comment or advise is appreciated.
Likewise - I'm hoping to look into this more myself, and any thoughts or
requirements that people can think of that should drive a decent
snapshot design should be brought up sooner rather than later.
--
Eric Blake eblake(a)redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
1:27 a.m.
New subject: [libvirt] [PATCH 0/3] [PoC] snapshot += xml
Hello,
this is just a proof-of-concept implementation for storing the domain xml
description with the xml snapshot data. This is needed for Qemu, since
restoring a Qemu domain after changing the "virtual hardware" (like changing
RAM size, number of CPUs, controllers) is not possible: The "loadvm" command
will fail to restore the saved state.
My idea was to save the domain XML data with the snapshot XML data, which
currently just contains a reference to the domain UUID. On snapshot-restore
that domain description is restored to overwrites the current domain
description.
I descided to store a reference to the parsed domainObj with the
domainSnapshotObj, since my goal was to detect on revert, if resuing the
currently running Qemu process is possible, or the the process needs to be
restartet with different arguments to revert changes to the "virtual
hardware". I hadn't had time to implement this yet, so currently the Qemu
process is restarted on every revert, which disconnects any VNC session and
is also a lot slower then simply calling "loadvm".
For this implementation I needed to pass "virCapsPtr" down to
virDomainSnapshotDefParseString(). I only implemented that correctly for
Qemu, so vbox and esx might be broken currently.
An alternative (and simpler) implementation would be to just store the
unparsed XML description with the runtime domainSnapshotObj. This would
simplify copying the domain description, but would complicate detecting
if "loadvm" is possible or Qemu must be restarted.
The implementation currently works very well for me, but I noticed some memory
leak, which might be related to this patch (or some other, since my version
of libvirt contains several other patches as well).
Philipp Hahn (3):
Swap virDomain / virFomainSnapshot declaration
snapshot: save domain description with snapshot
Snapshot: restore domain description from snapshot
src/conf/domain_conf.c | 27 +++++++++++--
src/conf/domain_conf.h | 102 ++++++++++++++++++++++++-----------------------
src/esx/esx_driver.c | 2 +-
src/qemu/qemu_driver.c | 43 +++++++++++++++++++-
src/vbox/vbox_tmpl.c | 2 +-
5 files changed, 117 insertions(+), 59 deletions(-)
1:06 a.m.
New subject: [libvirt] [PATCH 1/3] Swap virDomain / virFomainSnapshot declaration
In preparation for storing the domain description with the snapshot,
swap the order of declaration.
Signed-off-by: Philipp Hahn <hahn(a)univention.de>
---
src/conf/domain_conf.h | 100 ++++++++++++++++++++++++------------------------
1 files changed, 50 insertions(+), 50 deletions(-)
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 30aeccc..9e7e1ee 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -982,56 +982,6 @@ struct _virDomainClockDef {
# define VIR_DOMAIN_CPUMASK_LEN 1024
-/* Snapshot state */
-typedef struct _virDomainSnapshotDef virDomainSnapshotDef;
-typedef virDomainSnapshotDef *virDomainSnapshotDefPtr;
-struct _virDomainSnapshotDef {
- char *name;
- char *description;
- char *parent;
- time_t creationTime;
- int state;
-
- long active;
-};
-
-typedef struct _virDomainSnapshotObj virDomainSnapshotObj;
-typedef virDomainSnapshotObj *virDomainSnapshotObjPtr;
-struct _virDomainSnapshotObj {
- int refs;
-
- virDomainSnapshotDefPtr def;
-};
-
-typedef struct _virDomainSnapshotObjList virDomainSnapshotObjList;
-typedef virDomainSnapshotObjList *virDomainSnapshotObjListPtr;
-struct _virDomainSnapshotObjList {
- /* name string -> virDomainSnapshotObj mapping
- * for O(1), lockless lookup-by-name */
- virHashTable *objs;
-};
-
-virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char *xmlStr,
- int newSnapshot);
-void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def);
-char *virDomainSnapshotDefFormat(char *domain_uuid,
- virDomainSnapshotDefPtr def,
- int internal);
-virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr
snapshots,
- const virDomainSnapshotDefPtr def);
-
-int virDomainSnapshotObjListInit(virDomainSnapshotObjListPtr objs);
-int virDomainSnapshotObjListGetNames(virDomainSnapshotObjListPtr snapshots,
- char **const names, int maxnames);
-int virDomainSnapshotObjListNum(virDomainSnapshotObjListPtr snapshots);
-virDomainSnapshotObjPtr virDomainSnapshotFindByName(const virDomainSnapshotObjListPtr
snapshots,
- const char *name);
-void virDomainSnapshotObjListRemove(virDomainSnapshotObjListPtr snapshots,
- virDomainSnapshotObjPtr snapshot);
-int virDomainSnapshotObjUnref(virDomainSnapshotObjPtr snapshot);
-int virDomainSnapshotHasChildren(virDomainSnapshotObjPtr snap,
- virDomainSnapshotObjListPtr snapshots);
-
/* Guest VM main configuration */
typedef struct _virDomainDef virDomainDef;
typedef virDomainDef *virDomainDefPtr;
@@ -1122,6 +1072,56 @@ struct _virDomainDef {
virDomainXMLNamespace ns;
};
+/* Snapshot state */
+typedef struct _virDomainSnapshotDef virDomainSnapshotDef;
+typedef virDomainSnapshotDef *virDomainSnapshotDefPtr;
+struct _virDomainSnapshotDef {
+ char *name;
+ char *description;
+ char *parent;
+ time_t creationTime;
+ int state;
+
+ long active;
+};
+
+typedef struct _virDomainSnapshotObj virDomainSnapshotObj;
+typedef virDomainSnapshotObj *virDomainSnapshotObjPtr;
+struct _virDomainSnapshotObj {
+ int refs;
+
+ virDomainSnapshotDefPtr def;
+};
+
+typedef struct _virDomainSnapshotObjList virDomainSnapshotObjList;
+typedef virDomainSnapshotObjList *virDomainSnapshotObjListPtr;
+struct _virDomainSnapshotObjList {
+ /* name string -> virDomainSnapshotObj mapping
+ * for O(1), lockless lookup-by-name */
+ virHashTable *objs;
+};
+
+virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char *xmlStr,
+ int newSnapshot);
+void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def);
+char *virDomainSnapshotDefFormat(char *domain_uuid,
+ virDomainSnapshotDefPtr def,
+ int internal);
+virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr
snapshots,
+ const virDomainSnapshotDefPtr def);
+
+int virDomainSnapshotObjListInit(virDomainSnapshotObjListPtr objs);
+int virDomainSnapshotObjListGetNames(virDomainSnapshotObjListPtr snapshots,
+ char **const names, int maxnames);
+int virDomainSnapshotObjListNum(virDomainSnapshotObjListPtr snapshots);
+virDomainSnapshotObjPtr virDomainSnapshotFindByName(const virDomainSnapshotObjListPtr
snapshots,
+ const char *name);
+void virDomainSnapshotObjListRemove(virDomainSnapshotObjListPtr snapshots,
+ virDomainSnapshotObjPtr snapshot);
+int virDomainSnapshotObjUnref(virDomainSnapshotObjPtr snapshot);
+int virDomainSnapshotHasChildren(virDomainSnapshotObjPtr snap,
+ virDomainSnapshotObjListPtr snapshots);
+
/* Guest VM runtime state */
typedef struct _virDomainObj virDomainObj;
typedef virDomainObj *virDomainObjPtr;
--
1.7.1
5:19 p.m.
New subject: [libvirt] [PATCH 1/3] Swap virDomain / virFomainSnapshot declaration
On 04/12/2011 12:06 AM, Philipp Hahn wrote:
0.33 years(!) later:
In preparation for storing the domain description with the snapshot,
swap the order of declaration.
Signed-off-by: Philipp Hahn<hahn(a)univention.de>
---
src/conf/domain_conf.h | 100 ++++++++++++++++++++++++------------------------
1 files changed, 50 insertions(+), 50 deletions(-)
Shouldn't strictly be necessary - can't a forward declaration do the
job? But I do like the concept - a snapshot contains a domain, so
domain is the smaller struct and should be listed first.
It wasn't too hard to rebase this one, so ACK and pushed.
I've already found a couple of mails from you in the backlog of my inbox
today with valid bug reports or patches.
To all list readers:
Feel free to ping the list on issues after a week or so if you think
people are dragging their feet on giving a reply (even if the reply is a
nack or a wait, that's better than silence).
--
Eric Blake eblake(a)redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
1:16 a.m.
New subject: [libvirt] [PATCH 2/3] snapshot: save domain description with snapshot
Save the domain description with the XML snapshot data.
TODOs:
- XML file is no longer nicely indented
- Fix esx driver
- Fix vbox driver
Signed-off-by: Philipp Hahn <hahn(a)univention.de>
---
src/conf/domain_conf.c | 27 +++++++++++++++++++++++----
src/conf/domain_conf.h | 4 +++-
src/esx/esx_driver.c | 2 +-
src/qemu/qemu_driver.c | 4 ++--
src/vbox/vbox_tmpl.c | 2 +-
5 files changed, 30 insertions(+), 9 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 16e1291..d568c43 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -8564,6 +8564,7 @@ void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def)
if (!def)
return;
+ virDomainDefFree(def->dom);
VIR_FREE(def->name);
VIR_FREE(def->description);
VIR_FREE(def->parent);
@@ -8571,7 +8572,8 @@ void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def)
}
virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char *xmlStr,
- int newSnapshot)
+ int newSnapshot,
+ virCapsPtr caps)
{
xmlXPathContextPtr ctxt = NULL;
xmlDocPtr xml = NULL;
@@ -8661,6 +8663,14 @@ virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char
*xmlStr,
else
def->creationTime = tv.tv_sec;
+ xmlNodePtr domainNode = virXPathNode("./domain", ctxt);
+ if (domainNode == NULL) {
+ virDomainReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing domain from existing snapshot"));
+ def->dom = NULL;
+ } else
+ def->dom = virDomainDefParseNode(caps, xml, domainNode,
VIR_DOMAIN_XML_INACTIVE);
+
ret = def;
cleanup:
@@ -8678,6 +8688,7 @@ char *virDomainSnapshotDefFormat(char *domain_uuid,
virDomainSnapshotDefPtr def,
int internal)
{
+ char *xml = NULL;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virBufferAddLit(&buf, "<domainsnapshot>\n");
@@ -8694,9 +8705,17 @@ char *virDomainSnapshotDefFormat(char *domain_uuid,
}
virBufferVSprintf(&buf, "
<creationTime>%ld</creationTime>\n",
def->creationTime);
- virBufferAddLit(&buf, " <domain>\n");
- virBufferVSprintf(&buf, " <uuid>%s</uuid>\n",
domain_uuid);
- virBufferAddLit(&buf, " </domain>\n");
+ if (def->dom != NULL) {
+ xml = virDomainDefFormat(def->dom, VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE);
+ }
+ if (xml != NULL) {
+ virBufferVSprintf(&buf, " %s", xml);
+ VIR_FREE(xml);
+ } else {
+ virBufferAddLit(&buf, " <domain>\n");
+ virBufferVSprintf(&buf, " <uuid>%s</uuid>\n",
domain_uuid);
+ virBufferAddLit(&buf, " </domain>\n");
+ }
if (internal)
virBufferVSprintf(&buf, " <active>%ld</active>\n",
def->active);
virBufferAddLit(&buf, "</domainsnapshot>\n");
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 9e7e1ee..c8c64ed 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1083,6 +1083,7 @@ struct _virDomainSnapshotDef {
int state;
long active;
+ virDomainDefPtr dom;
};
typedef struct _virDomainSnapshotObj virDomainSnapshotObj;
@@ -1102,7 +1103,8 @@ struct _virDomainSnapshotObjList {
};
virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char *xmlStr,
- int newSnapshot);
+ int newSnapshot,
+ virCapsPtr caps);
void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def);
char *virDomainSnapshotDefFormat(char *domain_uuid,
virDomainSnapshotDefPtr def,
diff --git a/src/esx/esx_driver.c b/src/esx/esx_driver.c
index 4f013e8..25c95c9 100644
--- a/src/esx/esx_driver.c
+++ b/src/esx/esx_driver.c
@@ -4058,7 +4058,7 @@ esxDomainSnapshotCreateXML(virDomainPtr domain, const char
*xmlDesc,
return NULL;
}
- def = virDomainSnapshotDefParseString(xmlDesc, 1);
+ def = virDomainSnapshotDefParseString(xmlDesc, 1, NULL); /* TODO:caps */
if (def == NULL) {
return NULL;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 4481261..5041d32 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -330,7 +330,7 @@ static void qemuDomainSnapshotLoad(void *payload,
continue;
}
- def = virDomainSnapshotDefParseString(xmlStr, 0);
+ def = virDomainSnapshotDefParseString(xmlStr, 0, qemu_driver->caps);
if (def == NULL) {
/* Nothing we can do here, skip this one */
VIR_ERROR(_("Failed to parse snapshot XML from file '%s'"),
fullpath);
@@ -6308,7 +6308,7 @@ static virDomainSnapshotPtr qemuDomainSnapshotCreateXML(virDomainPtr
domain,
if (!qemuDomainSnapshotIsAllowed(vm))
goto cleanup;
- if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1)))
+ if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1, qemu_driver->caps)))
goto cleanup;
if (!(snap = virDomainSnapshotAssignDef(&vm->snapshots, def)))
diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index e8ac48f..a8c8570 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -5547,7 +5547,7 @@ vboxDomainSnapshotCreateXML(virDomainPtr dom,
virCheckFlags(0, NULL);
- if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1)))
+ if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1, NULL))) /* TODO:caps */
goto cleanup;
vboxIIDFromUUID(&domiid, dom->uuid);
--
1.7.1
5:08 p.m.
New subject: [libvirt] [PATCH 2/3] snapshot: save domain description with snapshot
On 04/12/2011 12:16 AM, Philipp Hahn wrote:
Save the domain description with the XML snapshot data.
TODOs:
- XML file is no longer nicely indented
Cosmetic, and can be fixed later.
- Fix esx driver
- Fix vbox driver
Do these need to save domain xml state in the first place? They aren't
using libvirt to track domain state in the first time, but call out to
the hypervisor for everything. And if the hypervisor is already doing a
good job of reverting across configuration changes, then it doesn't hurt
if they continue to use just <domain>/<uuid> instead of full <domain> in
the snapshot output that libvirt generates on virDomainSnapshotGetXMLDesc.
@@ -8661,6 +8663,14 @@ virDomainSnapshotDefPtr
virDomainSnapshotDefParseString(const char *xmlStr,
else
def->creationTime = tv.tv_sec;
+ xmlNodePtr domainNode = virXPathNode("./domain", ctxt);
+ if (domainNode == NULL) {
+ virDomainReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing domain from existing snapshot"));
+ def->dom = NULL;
+ } else
+ def->dom = virDomainDefParseNode(caps, xml, domainNode,
VIR_DOMAIN_XML_INACTIVE);
For virDomainSnapshotCreateXML, <domain> should be ignored (unless I get
around to implementing my RFC of VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE);
it is normally an output-only field, so I'm not sure this hunk is right.
@@ -8694,9 +8705,17 @@ char *virDomainSnapshotDefFormat(char
*domain_uuid,
}
virBufferVSprintf(&buf,
"<creationTime>%ld</creationTime>\n",
def->creationTime);
- virBufferAddLit(&buf, "<domain>\n");
- virBufferVSprintf(&buf, "<uuid>%s</uuid>\n",
domain_uuid);
- virBufferAddLit(&buf, "</domain>\n");
+ if (def->dom != NULL) {
+ xml = virDomainDefFormat(def->dom, VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE);
Security hole. You cannot blindly add VIR_DOMAIN_XML_SECURE if this is
destined to external output, rather, it has to be passed in from the
user's flags, and libvirt.c has to validate that
virDomainSnapshotGetXMLDesc rejects the flag on read-only connections.
+ }
+ if (xml != NULL) {
+ virBufferVSprintf(&buf, " %s", xml);
Rather than printing the xml in place, we have to touch up the domain
formatter to take a variable indentation; it's a lot of refactoring just
for a pretty result (worth it in the long run, but not a show-stopper to
getting this feature in first).
I'm seeing how easy this is to rebase, but I'll certainly be using
something similar to this.
--
Eric Blake eblake(a)redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
8:47 p.m.
New subject: [libvirt] [PATCH 1/3] snapshot: refactor domain xml output
Minor semantic change - allow domain xml to be generated in place
within a larger buffer, rather than having to go through a
temporary string.
* src/conf/domain_conf.c (virDomainDefFormatInternal): Add
parameter.
(virDomainDefFormat, virDomainObjFormat): Update callers.
---
src/conf/domain_conf.c | 229 ++++++++++++++++++++++++-----------------------
1 files changed, 117 insertions(+), 112 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b3770c4..881350e 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -9863,12 +9863,15 @@ verify(((VIR_DOMAIN_XML_INTERNAL_STATUS |
& DUMPXML_FLAGS) == 0);
/* This internal version can accept VIR_DOMAIN_XML_INTERNAL_*,
- * whereas the public version cannot. */
-static char *
+ * whereas the public version cannot. Also, it appends to an existing
+ * buffer and lets the caller flaten to string. Return -1 on failure. */
+static int
virDomainDefFormatInternal(virDomainDefPtr def,
- unsigned int flags)
+ unsigned int flags,
+ virBufferPtr buf)
{
- virBuffer buf = VIR_BUFFER_INITIALIZER;
+ /* XXX Also need to take an indentation parameter - either int or
+ * string prefix, so that snapshot xml gets uniform indentation. */
unsigned char *uuid;
char uuidstr[VIR_UUID_STRING_BUFLEN];
const char *type = NULL;
@@ -9877,7 +9880,7 @@ virDomainDefFormatInternal(virDomainDefPtr def,
virCheckFlags(DUMPXML_FLAGS |
VIR_DOMAIN_XML_INTERNAL_STATUS |
VIR_DOMAIN_XML_INTERNAL_ACTUAL_NET,
- NULL);
+ -1);
if (!(type = virDomainVirtTypeToString(def->virtType))) {
virDomainReportError(VIR_ERR_INTERNAL_ERROR,
@@ -9888,99 +9891,99 @@ virDomainDefFormatInternal(virDomainDefPtr def,
if (def->id == -1)
flags |= VIR_DOMAIN_XML_INACTIVE;
- virBufferAsprintf(&buf, "<domain type='%s'", type);
+ virBufferAsprintf(buf, "<domain type='%s'", type);
if (!(flags & VIR_DOMAIN_XML_INACTIVE))
- virBufferAsprintf(&buf, " id='%d'", def->id);
+ virBufferAsprintf(buf, " id='%d'", def->id);
if (def->namespaceData && def->ns.href)
- virBufferAsprintf(&buf, " %s", (def->ns.href)());
- virBufferAddLit(&buf, ">\n");
+ virBufferAsprintf(buf, " %s", (def->ns.href)());
+ virBufferAddLit(buf, ">\n");
- virBufferEscapeString(&buf, " <name>%s</name>\n",
def->name);
+ virBufferEscapeString(buf, " <name>%s</name>\n",
def->name);
uuid = def->uuid;
virUUIDFormat(uuid, uuidstr);
- virBufferAsprintf(&buf, " <uuid>%s</uuid>\n", uuidstr);
+ virBufferAsprintf(buf, " <uuid>%s</uuid>\n", uuidstr);
if (def->description)
- virBufferEscapeString(&buf, "
<description>%s</description>\n",
+ virBufferEscapeString(buf, "
<description>%s</description>\n",
def->description);
- virBufferAsprintf(&buf, " <memory>%lu</memory>\n",
def->mem.max_balloon);
- virBufferAsprintf(&buf, "
<currentMemory>%lu</currentMemory>\n",
+ virBufferAsprintf(buf, " <memory>%lu</memory>\n",
def->mem.max_balloon);
+ virBufferAsprintf(buf, "
<currentMemory>%lu</currentMemory>\n",
def->mem.cur_balloon);
/* add blkiotune only if there are any */
if (def->blkio.weight) {
- virBufferAsprintf(&buf, " <blkiotune>\n");
- virBufferAsprintf(&buf, " <weight>%u</weight>\n",
+ virBufferAsprintf(buf, " <blkiotune>\n");
+ virBufferAsprintf(buf, " <weight>%u</weight>\n",
def->blkio.weight);
- virBufferAsprintf(&buf, " </blkiotune>\n");
+ virBufferAsprintf(buf, " </blkiotune>\n");
}
/* add memtune only if there are any */
if (def->mem.hard_limit || def->mem.soft_limit || def->mem.min_guarantee ||
def->mem.swap_hard_limit)
- virBufferAsprintf(&buf, " <memtune>\n");
+ virBufferAsprintf(buf, " <memtune>\n");
if (def->mem.hard_limit) {
- virBufferAsprintf(&buf, "
<hard_limit>%lu</hard_limit>\n",
+ virBufferAsprintf(buf, "
<hard_limit>%lu</hard_limit>\n",
def->mem.hard_limit);
}
if (def->mem.soft_limit) {
- virBufferAsprintf(&buf, "
<soft_limit>%lu</soft_limit>\n",
+ virBufferAsprintf(buf, "
<soft_limit>%lu</soft_limit>\n",
def->mem.soft_limit);
}
if (def->mem.min_guarantee) {
- virBufferAsprintf(&buf, "
<min_guarantee>%lu</min_guarantee>\n",
+ virBufferAsprintf(buf, "
<min_guarantee>%lu</min_guarantee>\n",
def->mem.min_guarantee);
}
if (def->mem.swap_hard_limit) {
- virBufferAsprintf(&buf, "
<swap_hard_limit>%lu</swap_hard_limit>\n",
+ virBufferAsprintf(buf, "
<swap_hard_limit>%lu</swap_hard_limit>\n",
def->mem.swap_hard_limit);
}
if (def->mem.hard_limit || def->mem.soft_limit || def->mem.min_guarantee ||
def->mem.swap_hard_limit)
- virBufferAsprintf(&buf, " </memtune>\n");
+ virBufferAsprintf(buf, " </memtune>\n");
if (def->mem.hugepage_backed) {
- virBufferAddLit(&buf, " <memoryBacking>\n");
- virBufferAddLit(&buf, " <hugepages/>\n");
- virBufferAddLit(&buf, " </memoryBacking>\n");
+ virBufferAddLit(buf, " <memoryBacking>\n");
+ virBufferAddLit(buf, " <hugepages/>\n");
+ virBufferAddLit(buf, " </memoryBacking>\n");
}
for (n = 0 ; n < def->cpumasklen ; n++)
if (def->cpumask[n] != 1)
allones = 0;
- virBufferAddLit(&buf, " <vcpu");
+ virBufferAddLit(buf, " <vcpu");
if (!allones) {
char *cpumask = NULL;
if ((cpumask =
virDomainCpuSetFormat(def->cpumask, def->cpumasklen)) == NULL)
goto cleanup;
- virBufferAsprintf(&buf, " cpuset='%s'", cpumask);
+ virBufferAsprintf(buf, " cpuset='%s'", cpumask);
VIR_FREE(cpumask);
}
if (def->vcpus != def->maxvcpus)
- virBufferAsprintf(&buf, " current='%u'", def->vcpus);
- virBufferAsprintf(&buf, ">%u</vcpu>\n", def->maxvcpus);
+ virBufferAsprintf(buf, " current='%u'", def->vcpus);
+ virBufferAsprintf(buf, ">%u</vcpu>\n", def->maxvcpus);
if (def->cputune.shares || def->cputune.vcpupin ||
def->cputune.period || def->cputune.quota)
- virBufferAddLit(&buf, " <cputune>\n");
+ virBufferAddLit(buf, " <cputune>\n");
if (def->cputune.shares)
- virBufferAsprintf(&buf, " <shares>%lu</shares>\n",
+ virBufferAsprintf(buf, " <shares>%lu</shares>\n",
def->cputune.shares);
if (def->cputune.period)
- virBufferAsprintf(&buf, " <period>%llu</period>\n",
+ virBufferAsprintf(buf, " <period>%llu</period>\n",
def->cputune.period);
if (def->cputune.quota)
- virBufferAsprintf(&buf, " <quota>%lld</quota>\n",
+ virBufferAsprintf(buf, " <quota>%lld</quota>\n",
def->cputune.quota);
if (def->cputune.vcpupin) {
int i;
for (i = 0; i < def->cputune.nvcpupin; i++) {
- virBufferAsprintf(&buf, " <vcpupin vcpu='%u' ",
+ virBufferAsprintf(buf, " <vcpupin vcpu='%u' ",
def->cputune.vcpupin[i]->vcpuid);
char *cpumask = NULL;
@@ -9993,17 +9996,17 @@ virDomainDefFormatInternal(virDomainDefPtr def,
goto cleanup;
}
- virBufferAsprintf(&buf, "cpuset='%s'/>\n",
cpumask);
+ virBufferAsprintf(buf, "cpuset='%s'/>\n", cpumask);
VIR_FREE(cpumask);
}
}
if (def->cputune.shares || def->cputune.vcpupin ||
def->cputune.period || def->cputune.quota)
- virBufferAddLit(&buf, " </cputune>\n");
+ virBufferAddLit(buf, " </cputune>\n");
if (def->numatune.memory.nodemask)
- virBufferAddLit(&buf, " <numatune>\n");
+ virBufferAddLit(buf, " <numatune>\n");
if (def->numatune.memory.nodemask) {
char *nodemask = NULL;
@@ -10015,32 +10018,32 @@ virDomainDefFormatInternal(virDomainDefPtr def,
goto cleanup;
}
- virBufferAsprintf(&buf, " <memory mode='%s'
nodeset='%s'/>\n",
+ virBufferAsprintf(buf, " <memory mode='%s'
nodeset='%s'/>\n",
virDomainNumatuneMemModeTypeToString(def->numatune.memory.mode),
nodemask);
VIR_FREE(nodemask);
}
if (def->numatune.memory.nodemask)
- virBufferAddLit(&buf, " </numatune>\n");
+ virBufferAddLit(buf, " </numatune>\n");
if (def->sysinfo)
- virDomainSysinfoDefFormat(&buf, def->sysinfo);
+ virDomainSysinfoDefFormat(buf, def->sysinfo);
if (def->os.bootloader) {
- virBufferEscapeString(&buf, "
<bootloader>%s</bootloader>\n",
+ virBufferEscapeString(buf, "
<bootloader>%s</bootloader>\n",
def->os.bootloader);
if (def->os.bootloaderArgs)
- virBufferEscapeString(&buf, "
<bootloader_args>%s</bootloader_args>\n",
+ virBufferEscapeString(buf, "
<bootloader_args>%s</bootloader_args>\n",
def->os.bootloaderArgs);
}
- virBufferAddLit(&buf, " <os>\n");
+ virBufferAddLit(buf, " <os>\n");
- virBufferAddLit(&buf, " <type");
+ virBufferAddLit(buf, " <type");
if (def->os.arch)
- virBufferAsprintf(&buf, " arch='%s'", def->os.arch);
+ virBufferAsprintf(buf, " arch='%s'", def->os.arch);
if (def->os.machine)
- virBufferAsprintf(&buf, " machine='%s'",
def->os.machine);
+ virBufferAsprintf(buf, " machine='%s'", def->os.machine);
/*
* HACK: For xen driver we previously used bogus 'linux' as the
* os type for paravirt, whereas capabilities declare it to
@@ -10048,27 +10051,27 @@ virDomainDefFormatInternal(virDomainDefPtr def,
*/
if (def->virtType == VIR_DOMAIN_VIRT_XEN &&
STREQ(def->os.type, "xen"))
- virBufferAsprintf(&buf, ">%s</type>\n",
"linux");
+ virBufferAsprintf(buf, ">%s</type>\n", "linux");
else
- virBufferAsprintf(&buf, ">%s</type>\n", def->os.type);
+ virBufferAsprintf(buf, ">%s</type>\n", def->os.type);
if (def->os.init)
- virBufferEscapeString(&buf, " <init>%s</init>\n",
+ virBufferEscapeString(buf, " <init>%s</init>\n",
def->os.init);
if (def->os.loader)
- virBufferEscapeString(&buf, "
<loader>%s</loader>\n",
+ virBufferEscapeString(buf, " <loader>%s</loader>\n",
def->os.loader);
if (def->os.kernel)
- virBufferEscapeString(&buf, "
<kernel>%s</kernel>\n",
+ virBufferEscapeString(buf, " <kernel>%s</kernel>\n",
def->os.kernel);
if (def->os.initrd)
- virBufferEscapeString(&buf, "
<initrd>%s</initrd>\n",
+ virBufferEscapeString(buf, " <initrd>%s</initrd>\n",
def->os.initrd);
if (def->os.cmdline)
- virBufferEscapeString(&buf, "
<cmdline>%s</cmdline>\n",
+ virBufferEscapeString(buf, " <cmdline>%s</cmdline>\n",
def->os.cmdline);
if (def->os.root)
- virBufferEscapeString(&buf, " <root>%s</root>\n",
+ virBufferEscapeString(buf, " <root>%s</root>\n",
def->os.root);
if (!def->os.bootloader) {
@@ -10081,21 +10084,21 @@ virDomainDefFormatInternal(virDomainDefPtr def,
def->os.bootDevs[n]);
goto cleanup;
}
- virBufferAsprintf(&buf, " <boot dev='%s'/>\n",
boottype);
+ virBufferAsprintf(buf, " <boot dev='%s'/>\n",
boottype);
}
if (def->os.bootmenu != VIR_DOMAIN_BOOT_MENU_DEFAULT) {
const char *enabled = (def->os.bootmenu ==
VIR_DOMAIN_BOOT_MENU_ENABLED ? "yes"
: "no");
- virBufferAsprintf(&buf, " <bootmenu
enable='%s'/>\n", enabled);
+ virBufferAsprintf(buf, " <bootmenu
enable='%s'/>\n", enabled);
}
if (def->os.bios.useserial) {
const char *useserial = (def->os.bios.useserial ==
VIR_DOMAIN_BIOS_USESERIAL_YES ? "yes"
: "no");
- virBufferAsprintf(&buf, " <bios
useserial='%s'/>\n", useserial);
+ virBufferAsprintf(buf, " <bios
useserial='%s'/>\n", useserial);
}
}
@@ -10108,14 +10111,14 @@ virDomainDefFormatInternal(virDomainDefPtr def,
_("unexpected smbios mode %d"),
def->os.smbios_mode);
goto cleanup;
}
- virBufferAsprintf(&buf, " <smbios mode='%s'/>\n",
mode);
+ virBufferAsprintf(buf, " <smbios mode='%s'/>\n",
mode);
}
- virBufferAddLit(&buf, " </os>\n");
+ virBufferAddLit(buf, " </os>\n");
if (def->features) {
int i;
- virBufferAddLit(&buf, " <features>\n");
+ virBufferAddLit(buf, " <features>\n");
for (i = 0 ; i < VIR_DOMAIN_FEATURE_LAST ; i++) {
if (def->features & (1 << i)) {
const char *name = virDomainFeatureTypeToString(i);
@@ -10124,91 +10127,91 @@ virDomainDefFormatInternal(virDomainDefPtr def,
_("unexpected feature %d"), i);
goto cleanup;
}
- virBufferAsprintf(&buf, " <%s/>\n", name);
+ virBufferAsprintf(buf, " <%s/>\n", name);
}
}
- virBufferAddLit(&buf, " </features>\n");
+ virBufferAddLit(buf, " </features>\n");
}
- if (virCPUDefFormatBuf(&buf, def->cpu, " ", 0) < 0)
+ if (virCPUDefFormatBuf(buf, def->cpu, " ", 0) < 0)
goto cleanup;
- virBufferAsprintf(&buf, " <clock offset='%s'",
+ virBufferAsprintf(buf, " <clock offset='%s'",
virDomainClockOffsetTypeToString(def->clock.offset));
switch (def->clock.offset) {
case VIR_DOMAIN_CLOCK_OFFSET_VARIABLE:
- virBufferAsprintf(&buf, " adjustment='%lld'",
def->clock.data.adjustment);
+ virBufferAsprintf(buf, " adjustment='%lld'",
def->clock.data.adjustment);
break;
case VIR_DOMAIN_CLOCK_OFFSET_TIMEZONE:
- virBufferEscapeString(&buf, " timezone='%s'",
def->clock.data.timezone);
+ virBufferEscapeString(buf, " timezone='%s'",
def->clock.data.timezone);
break;
}
if (def->clock.ntimers == 0) {
- virBufferAddLit(&buf, "/>\n");
+ virBufferAddLit(buf, "/>\n");
} else {
- virBufferAddLit(&buf, ">\n");
+ virBufferAddLit(buf, ">\n");
for (n = 0; n < def->clock.ntimers; n++) {
- if (virDomainTimerDefFormat(&buf, def->clock.timers[n]) < 0)
+ if (virDomainTimerDefFormat(buf, def->clock.timers[n]) < 0)
goto cleanup;
}
- virBufferAddLit(&buf, " </clock>\n");
+ virBufferAddLit(buf, " </clock>\n");
}
- if (virDomainLifecycleDefFormat(&buf, def->onPoweroff,
+ if (virDomainLifecycleDefFormat(buf, def->onPoweroff,
"on_poweroff",
virDomainLifecycleTypeToString) < 0)
goto cleanup;
- if (virDomainLifecycleDefFormat(&buf, def->onReboot,
+ if (virDomainLifecycleDefFormat(buf, def->onReboot,
"on_reboot",
virDomainLifecycleTypeToString) < 0)
goto cleanup;
- if (virDomainLifecycleDefFormat(&buf, def->onCrash,
+ if (virDomainLifecycleDefFormat(buf, def->onCrash,
"on_crash",
virDomainLifecycleCrashTypeToString) < 0)
goto cleanup;
- virBufferAddLit(&buf, " <devices>\n");
+ virBufferAddLit(buf, " <devices>\n");
if (def->emulator)
- virBufferEscapeString(&buf, "
<emulator>%s</emulator>\n",
+ virBufferEscapeString(buf, "
<emulator>%s</emulator>\n",
def->emulator);
for (n = 0 ; n < def->ndisks ; n++)
- if (virDomainDiskDefFormat(&buf, def->disks[n], flags) < 0)
+ if (virDomainDiskDefFormat(buf, def->disks[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->ncontrollers ; n++)
- if (virDomainControllerDefFormat(&buf, def->controllers[n], flags) <
0)
+ if (virDomainControllerDefFormat(buf, def->controllers[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nleases ; n++)
- if (virDomainLeaseDefFormat(&buf, def->leases[n]) < 0)
+ if (virDomainLeaseDefFormat(buf, def->leases[n]) < 0)
goto cleanup;
for (n = 0 ; n < def->nfss ; n++)
- if (virDomainFSDefFormat(&buf, def->fss[n], flags) < 0)
+ if (virDomainFSDefFormat(buf, def->fss[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nnets ; n++)
- if (virDomainNetDefFormat(&buf, def->nets[n], flags) < 0)
+ if (virDomainNetDefFormat(buf, def->nets[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nsmartcards ; n++)
- if (virDomainSmartcardDefFormat(&buf, def->smartcards[n], flags) < 0)
+ if (virDomainSmartcardDefFormat(buf, def->smartcards[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nserials ; n++)
- if (virDomainChrDefFormat(&buf, def->serials[n], flags) < 0)
+ if (virDomainChrDefFormat(buf, def->serials[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nparallels ; n++)
- if (virDomainChrDefFormat(&buf, def->parallels[n], flags) < 0)
+ if (virDomainChrDefFormat(buf, def->parallels[n], flags) < 0)
goto cleanup;
/* If there's a PV console that's preferred.. */
if (def->console) {
- if (virDomainChrDefFormat(&buf, def->console, flags) < 0)
+ if (virDomainChrDefFormat(buf, def->console, flags) < 0)
goto cleanup;
} else if (def->nserials != 0) {
/* ..else for legacy compat duplicate the first serial device as a
@@ -10216,17 +10219,17 @@ virDomainDefFormatInternal(virDomainDefPtr def,
virDomainChrDef console;
memcpy(&console, def->serials[0], sizeof(console));
console.deviceType = VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE;
- if (virDomainChrDefFormat(&buf, &console, flags) < 0)
+ if (virDomainChrDefFormat(buf, &console, flags) < 0)
goto cleanup;
}
for (n = 0 ; n < def->nchannels ; n++)
- if (virDomainChrDefFormat(&buf, def->channels[n], flags) < 0)
+ if (virDomainChrDefFormat(buf, def->channels[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->ninputs ; n++)
if (def->inputs[n]->bus == VIR_DOMAIN_INPUT_BUS_USB &&
- virDomainInputDefFormat(&buf, def->inputs[n], flags) < 0)
+ virDomainInputDefFormat(buf, def->inputs[n], flags) < 0)
goto cleanup;
if (def->ngraphics > 0) {
@@ -10238,33 +10241,33 @@ virDomainDefFormatInternal(virDomainDefPtr def,
{ .alias = NULL },
};
- if (virDomainInputDefFormat(&buf, &autoInput, flags) < 0)
+ if (virDomainInputDefFormat(buf, &autoInput, flags) < 0)
goto cleanup;
for (n = 0 ; n < def->ngraphics ; n++)
- if (virDomainGraphicsDefFormat(&buf, def->graphics[n], flags) < 0)
+ if (virDomainGraphicsDefFormat(buf, def->graphics[n], flags) < 0)
goto cleanup;
}
for (n = 0 ; n < def->nsounds ; n++)
- if (virDomainSoundDefFormat(&buf, def->sounds[n], flags) < 0)
+ if (virDomainSoundDefFormat(buf, def->sounds[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nvideos ; n++)
- if (virDomainVideoDefFormat(&buf, def->videos[n], flags) < 0)
+ if (virDomainVideoDefFormat(buf, def->videos[n], flags) < 0)
goto cleanup;
for (n = 0 ; n < def->nhostdevs ; n++)
- if (virDomainHostdevDefFormat(&buf, def->hostdevs[n], flags) < 0)
+ if (virDomainHostdevDefFormat(buf, def->hostdevs[n], flags) < 0)
goto cleanup;
if (def->watchdog)
- virDomainWatchdogDefFormat (&buf, def->watchdog, flags);
+ virDomainWatchdogDefFormat (buf, def->watchdog, flags);
if (def->memballoon)
- virDomainMemballoonDefFormat (&buf, def->memballoon, flags);
+ virDomainMemballoonDefFormat (buf, def->memballoon, flags);
- virBufferAddLit(&buf, " </devices>\n");
+ virBufferAddLit(buf, " </devices>\n");
if (def->seclabel.model) {
const char *sectype = virDomainSeclabelTypeToString(def->seclabel.type);
@@ -10276,47 +10279,52 @@ virDomainDefFormatInternal(virDomainDefPtr def,
(flags & VIR_DOMAIN_XML_INACTIVE)) {
/* This is the default for inactive xml, so nothing to output. */
} else {
- virBufferAsprintf(&buf, " <seclabel type='%s'
model='%s' relabel='%s'>\n",
+ virBufferAsprintf(buf, " <seclabel type='%s'
model='%s' relabel='%s'>\n",
sectype, def->seclabel.model,
def->seclabel.norelabel ? "no" :
"yes");
if (def->seclabel.label)
- virBufferEscapeString(&buf, "
<label>%s</label>\n",
+ virBufferEscapeString(buf, "
<label>%s</label>\n",
def->seclabel.label);
if (!def->seclabel.norelabel && def->seclabel.imagelabel)
- virBufferEscapeString(&buf, "
<imagelabel>%s</imagelabel>\n",
+ virBufferEscapeString(buf, "
<imagelabel>%s</imagelabel>\n",
def->seclabel.imagelabel);
if (def->seclabel.baselabel &&
(def->seclabel.type == VIR_DOMAIN_SECLABEL_DYNAMIC))
- virBufferEscapeString(&buf, "
<baselabel>%s</baselabel>\n",
+ virBufferEscapeString(buf, "
<baselabel>%s</baselabel>\n",
def->seclabel.baselabel);
- virBufferAddLit(&buf, " </seclabel>\n");
+ virBufferAddLit(buf, " </seclabel>\n");
}
}
if (def->namespaceData && def->ns.format) {
- if ((def->ns.format)(&buf, def->namespaceData) < 0)
+ if ((def->ns.format)(buf, def->namespaceData) < 0)
goto cleanup;
}
- virBufferAddLit(&buf, "</domain>\n");
+ virBufferAddLit(buf, "</domain>\n");
- if (virBufferError(&buf))
+ if (virBufferError(buf))
goto no_memory;
- return virBufferContentAndReset(&buf);
+ return 0;
no_memory:
virReportOOMError();
cleanup:
- virBufferFreeAndReset(&buf);
- return NULL;
+ virBufferFreeAndReset(buf);
+ return -1;
}
char *
virDomainDefFormat(virDomainDefPtr def, unsigned int flags)
{
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+
virCheckFlags(DUMPXML_FLAGS, NULL);
- return virDomainDefFormatInternal(def, flags);
+ if (virDomainDefFormatInternal(def, flags, &buf) < 0)
+ return NULL;
+
+ return virBufferContentAndReset(&buf);
}
@@ -10324,7 +10332,6 @@ static char *virDomainObjFormat(virCapsPtr caps,
virDomainObjPtr obj,
unsigned int flags)
{
- char *config_xml = NULL;
virBuffer buf = VIR_BUFFER_INITIALIZER;
int state;
int reason;
@@ -10346,11 +10353,9 @@ static char *virDomainObjFormat(virCapsPtr caps,
((caps->privateDataXMLFormat)(&buf, obj->privateData)) < 0)
goto error;
- if (!(config_xml = virDomainDefFormatInternal(obj->def, flags)))
+ if (virDomainDefFormatInternal(obj->def, flags, &buf) < 0)
goto error;
- virBufferAdd(&buf, config_xml, strlen(config_xml));
- VIR_FREE(config_xml);
virBufferAddLit(&buf, "</domstatus>\n");
if (virBufferError(&buf))
--
1.7.4.4
8:47 p.m.
New subject: [libvirt] [PATCH 2/3] snapshot: track full domain xml in snapshot
Just like VM saved state images (virsh save), snapshots MUST
track the inactive domain xml to detect any ABI incompatibilities.
The indentation is not perfect, but functionality comes before form.
* src/conf/domain_conf.h (_virDomainSnapshotDef): Add member.
(virDomainSnapshotDefParseString, virDomainSnapshotDefFormat):
Update signature.
* src/conf/domain_conf.c (virDomainSnapshotDefFree): Clean up.
(virDomainSnapshotDefParseString): Optionally parse domain.
(virDomainSnapshotDefFormat): Output full domain.
* src/esx/esx_driver.c (esxDomainSnapshotCreateXML)
(esxDomainSnapshotGetXMLDesc): Update callers.
* src/vbox/vbox_tmpl.c (vboxDomainSnapshotCreateXML)
(vboxDomainSnapshotGetXMLDesc): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateXML)
(qemuDomainSnapshotLoad, qemuDomainSnapshotGetXMLDesc)
(qemuDomainSnapshotWriteMetadata): Likewise.
Based on a patch by Philipp Hahn.
---
Differences from Philipp's v1:
rebase to latest libvirt.git
caps are only needed when parsing an internal xml (that is, esx
and vbox no longer have a to-do)
on format, pass flags down from user
src/conf/domain_conf.c | 49 +++++++++++++++++++++++++++++++++++++++++------
src/conf/domain_conf.h | 7 +++++-
src/esx/esx_driver.c | 4 +-
src/qemu/qemu_driver.c | 18 +++++++++++++---
src/vbox/vbox_tmpl.c | 4 +-
5 files changed, 66 insertions(+), 16 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 881350e..295b92f 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -10915,11 +10915,17 @@ void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def)
VIR_FREE(def->name);
VIR_FREE(def->description);
VIR_FREE(def->parent);
+ virDomainDefFree(def->dom);
VIR_FREE(def);
}
-virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char *xmlStr,
- int newSnapshot)
+/* If newSnapshot is true, caps, expectedVirtTypes, and flags are ignored. */
+virDomainSnapshotDefPtr
+virDomainSnapshotDefParseString(const char *xmlStr,
+ int newSnapshot,
+ virCapsPtr caps,
+ unsigned int expectedVirtTypes,
+ unsigned int flags)
{
xmlXPathContextPtr ctxt = NULL;
xmlDocPtr xml = NULL;
@@ -10927,6 +10933,7 @@ virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char
*xmlStr,
virDomainSnapshotDefPtr ret = NULL;
char *creation = NULL, *state = NULL;
struct timeval tv;
+ char *tmp;
xml = virXMLParse(NULL, xmlStr, "domainsnapshot.xml");
if (!xml) {
@@ -10995,9 +11002,28 @@ virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const
char *xmlStr,
_("Could not find 'active'
element"));
goto cleanup;
}
- }
- else
+
+ /* Older snapshots were created with just <domain>/<uuid>, and
+ * lack domain/@type. In that case, leave dom NULL, and
+ * clients will have to decide between best effort
+ * initialization or outright failure. */
+ if ((tmp = virXPathString("string(./domain/@type)", ctxt))) {
+ VIR_FREE(tmp);
+ xmlNodePtr domainNode = virXPathNode("./domain", ctxt);
+ if (!domainNode) {
+ virDomainReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("missing domain in snapshot"));
+ goto cleanup;
+ }
+ def->dom = virDomainDefParseNode(caps, xml, domainNode,
+ expectedVirtTypes, flags);
+ if (!def->dom)
+ goto cleanup;
+ } else {
+ VIR_WARN("parsing older snapshot that lacks domain");
+ }
def->creationTime = tv.tv_sec;
+ }
ret = def;
@@ -11014,10 +11040,15 @@ cleanup:
char *virDomainSnapshotDefFormat(char *domain_uuid,
virDomainSnapshotDefPtr def,
+ unsigned int flags,
int internal)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
+ virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL);
+
+ flags |= VIR_DOMAIN_XML_INACTIVE;
+
virBufferAddLit(&buf, "<domainsnapshot>\n");
virBufferAsprintf(&buf, " <name>%s</name>\n",
def->name);
if (def->description)
@@ -11032,9 +11063,13 @@ char *virDomainSnapshotDefFormat(char *domain_uuid,
}
virBufferAsprintf(&buf, "
<creationTime>%lld</creationTime>\n",
def->creationTime);
- virBufferAddLit(&buf, " <domain>\n");
- virBufferAsprintf(&buf, " <uuid>%s</uuid>\n",
domain_uuid);
- virBufferAddLit(&buf, " </domain>\n");
+ if (def->dom) {
+ virDomainDefFormatInternal(def->dom, flags, &buf);
+ } else {
+ virBufferAddLit(&buf, " <domain>\n");
+ virBufferAsprintf(&buf, " <uuid>%s</uuid>\n",
domain_uuid);
+ virBufferAddLit(&buf, " </domain>\n");
+ }
if (internal)
virBufferAsprintf(&buf, " <active>%ld</active>\n",
def->active);
virBufferAddLit(&buf, "</domainsnapshot>\n");
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index e37cf26..0241838 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1291,6 +1291,7 @@ struct _virDomainSnapshotDef {
char *parent;
long long creationTime; /* in seconds */
int state;
+ virDomainDefPtr dom;
long active; /* XXX make this internal use only to identify current snap */
};
@@ -1313,10 +1314,14 @@ struct _virDomainSnapshotObjList {
};
virDomainSnapshotDefPtr virDomainSnapshotDefParseString(const char *xmlStr,
- int newSnapshot);
+ int newSnapshot,
+ virCapsPtr caps,
+ unsigned int expectedVirtTypes,
+ unsigned int flags);
void virDomainSnapshotDefFree(virDomainSnapshotDefPtr def);
char *virDomainSnapshotDefFormat(char *domain_uuid,
virDomainSnapshotDefPtr def,
+ unsigned int flags,
int internal);
virDomainSnapshotObjPtr virDomainSnapshotAssignDef(virDomainSnapshotObjListPtr
snapshots,
const virDomainSnapshotDefPtr def);
diff --git a/src/esx/esx_driver.c b/src/esx/esx_driver.c
index c71b1b3..eb1633d 100644
--- a/src/esx/esx_driver.c
+++ b/src/esx/esx_driver.c
@@ -4223,7 +4223,7 @@ esxDomainSnapshotCreateXML(virDomainPtr domain, const char
*xmlDesc,
return NULL;
}
- def = virDomainSnapshotDefParseString(xmlDesc, 1);
+ def = virDomainSnapshotDefParseString(xmlDesc, 1, NULL, 0, 0);
if (def == NULL) {
return NULL;
@@ -4319,7 +4319,7 @@ esxDomainSnapshotGetXMLDesc(virDomainSnapshotPtr snapshot,
virUUIDFormat(snapshot->domain->uuid, uuid_string);
- xml = virDomainSnapshotDefFormat(uuid_string, &def, 0);
+ xml = virDomainSnapshotDefFormat(uuid_string, &def, flags, 0);
cleanup:
esxVI_VirtualMachineSnapshotTree_Free(&rootSnapshotList);
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index da2703e..565f578 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -336,7 +336,10 @@ static void qemuDomainSnapshotLoad(void *payload,
continue;
}
- def = virDomainSnapshotDefParseString(xmlStr, 0);
+ def = virDomainSnapshotDefParseString(xmlStr, 0, qemu_driver->caps,
+ QEMU_EXPECTED_VIRT_TYPES,
+ (VIR_DOMAIN_XML_INACTIVE |
+ VIR_DOMAIN_XML_SECURE));
if (def == NULL) {
/* Nothing we can do here, skip this one */
VIR_ERROR(_("Failed to parse snapshot XML from file '%s'"),
fullpath);
@@ -8467,7 +8470,8 @@ static int qemuDomainSnapshotWriteMetadata(virDomainObjPtr vm,
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(vm->def->uuid, uuidstr);
- newxml = virDomainSnapshotDefFormat(uuidstr, snapshot->def, 1);
+ newxml = virDomainSnapshotDefFormat(uuidstr, snapshot->def,
+ VIR_DOMAIN_XML_SECURE, 1);
if (newxml == NULL) {
virReportOOMError();
return -1;
@@ -8493,6 +8497,12 @@ static int qemuDomainSnapshotWriteMetadata(virDomainObjPtr vm,
_("failed to create snapshot file '%s'"),
snapFile);
goto cleanup;
}
+ /* XXX need virsh snapshot-edit, before this makes sense:
+ * char *tmp;
+ * virAsprintf(&tmp, "snapshot-edit %s", vm->def->name);
+ * virEmitXMLWarning(fd, snapshot->def->name, tmp);
+ * VIR_FREE(tmp);
+ */
if (safewrite(fd, newxml, strlen(newxml)) != strlen(newxml)) {
virReportSystemError(errno, _("Failed to write snapshot data to %s"),
snapFile);
@@ -8688,7 +8698,7 @@ static virDomainSnapshotPtr qemuDomainSnapshotCreateXML(virDomainPtr
domain,
if (!qemuDomainSnapshotIsAllowed(vm))
goto cleanup;
- if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1)))
+ if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1, NULL, 0, 0)))
goto cleanup;
if (!(snap = virDomainSnapshotAssignDef(&vm->snapshots, def)))
@@ -8929,7 +8939,7 @@ static char *qemuDomainSnapshotGetXMLDesc(virDomainSnapshotPtr
snapshot,
goto cleanup;
}
- xml = virDomainSnapshotDefFormat(uuidstr, snap->def, 0);
+ xml = virDomainSnapshotDefFormat(uuidstr, snap->def, flags, 0);
cleanup:
if (vm)
diff --git a/src/vbox/vbox_tmpl.c b/src/vbox/vbox_tmpl.c
index 91a5423..b8deed3 100644
--- a/src/vbox/vbox_tmpl.c
+++ b/src/vbox/vbox_tmpl.c
@@ -5661,7 +5661,7 @@ vboxDomainSnapshotCreateXML(virDomainPtr dom,
virCheckFlags(0, NULL);
- if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1)))
+ if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1, NULL, 0, 0)))
goto cleanup;
vboxIIDFromUUID(&domiid, dom->uuid);
@@ -5843,7 +5843,7 @@ vboxDomainSnapshotGetXMLDesc(virDomainSnapshotPtr snapshot,
def->state = VIR_DOMAIN_SHUTOFF;
virUUIDFormat(dom->uuid, uuidstr);
- ret = virDomainSnapshotDefFormat(uuidstr, def, 0);
+ ret = virDomainSnapshotDefFormat(uuidstr, def, flags, 0);
cleanup:
virDomainSnapshotDefFree(def);
--
1.7.4.4
8:47 p.m.
New subject: [libvirt] [PATCH 3/3] snapshot: update rng to support full domain in xml
* docs/schemas/domain.rng: Move guts...
* docs/schemas/domaincommon.rng: ...to new file.
* docs/schemas/domainsnapshot.rng: Allow new xml.
* docs/schemas/Makefile.am (schema_DATA): Distribute new file.
* tests/domainsnapshotxml2xmlout/full_domain.xml: New test.
---
I've shortened this email by trimming the deletions from domain.rng;
git shows the code motion and slight changes in the new domaincommon.rng.
docs/schemas/Makefile.am | 1 +
docs/schemas/domain.rng | 2541 +-----------------------
docs/schemas/{domain.rng => domaincommon.rng} | 8 +-
docs/schemas/domainsnapshot.rng | 14 +-
tests/domainsnapshotxml2xmlout/full_domain.xml | 35 +
5 files changed, 49 insertions(+), 2550 deletions(-)
copy docs/schemas/{domain.rng => domaincommon.rng} (99%)
create mode 100644 tests/domainsnapshotxml2xmlout/full_domain.xml
diff --git a/docs/schemas/Makefile.am b/docs/schemas/Makefile.am
index 596c207..4413d9e 100644
--- a/docs/schemas/Makefile.am
+++ b/docs/schemas/Makefile.am
@@ -6,6 +6,7 @@ schema_DATA = \
basictypes.rng \
capability.rng \
domain.rng \
+ domaincommon.rng \
domainsnapshot.rng \
interface.rng \
network.rng \
diff --git a/docs/schemas/domain.rng b/docs/schemas/domain.rng
index 6ccbeed..cf0be68 100644
--- a/docs/schemas/domain.rng
+++ b/docs/schemas/domain.rng
@@ -5,2544 +5,5 @@
<ref name="domain"/>
</start>
- <include href='basictypes.rng'/>
...
- <define name="filter-param-value">
- <data type="string">
- <param name="pattern">[a-zA-Z0-9_\.:]+</param>
- </data>
- </define>
+ <include href='domaincommon.rng'/>
</grammar>
diff --git a/docs/schemas/domain.rng b/docs/schemas/domaincommon.rng
similarity index 99%
copy from docs/schemas/domain.rng
copy to docs/schemas/domaincommon.rng
index 6ccbeed..afce778 100644
--- a/docs/schemas/domain.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1,16 +1,12 @@
<?xml version="1.0"?>
<grammar xmlns="http://relaxng.org/ns/structure/1.0"
datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
- <!-- We handle only document defining a domain -->
- <start>
- <ref name="domain"/>
- </start>
-
+ <!-- domain-related definitions used in multiple grammars -->
<include href='basictypes.rng'/>
<include href='storageencryption.rng'/>
<include href='networkcommon.rng'/>
<!--
- description element, maybe placed anywhere under the root
+ description element, may be placed anywhere under the root
-->
<define name="description">
<element name="description">
diff --git a/docs/schemas/domainsnapshot.rng b/docs/schemas/domainsnapshot.rng
index 86bab0b..76caa46 100644
--- a/docs/schemas/domainsnapshot.rng
+++ b/docs/schemas/domainsnapshot.rng
@@ -1,9 +1,12 @@
+<?xml version="1.0"?>
<!-- A Relax NG schema for the libvirt domain snapshot properties XML format -->
<grammar xmlns="http://relaxng.org/ns/structure/1.0">
<start>
<ref name='domainsnapshot'/>
</start>
+ <include href='domaincommon.rng'/>
+
<define name='domainsnapshot'>
<element name='domainsnapshot'>
<interleave>
@@ -33,11 +36,14 @@
</element>
</optional>
<optional>
- <element name='domain'>
- <element name='uuid'>
- <text/>
+ <choice>
+ <element name='domain'>
+ <element name='uuid'>
+ <ref name="UUID"/>
+ </element>
</element>
- </element>
+ <ref name='domain'/>
+ </choice>
</optional>
<optional>
<element name='parent'>
diff --git a/tests/domainsnapshotxml2xmlout/full_domain.xml
b/tests/domainsnapshotxml2xmlout/full_domain.xml
new file mode 100644
index 0000000..942bd7f
--- /dev/null
+++ b/tests/domainsnapshotxml2xmlout/full_domain.xml
@@ -0,0 +1,35 @@
+<domainsnapshot>
+ <name>my snap name</name>
+ <description>!@#$%^</description>
+ <parent>
+ <name>earlier_snap</name>
+ </parent>
+ <state>running</state>
+ <creationTime>1272917631</creationTime>
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory>219100</memory>
+ <currentMemory>219100</currentMemory>
+ <vcpu cpuset='1-4,8-20,525'>1</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0'
unit='0'/>
+ </disk>
+ <controller type='ide' index='0'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
+ <active>1</active>
+</domainsnapshot>
--
1.7.4.4
1:44 a.m.
New subject: [libvirt] [PATCH 2/3] snapshot: save domain description with snapshot
Hello Eric,
Am Samstag 13 August 2011 00:08:11 schrieb Eric Blake:
On 04/12/2011 12:16 AM, Philipp Hahn wrote:
> Save the domain description with the XML snapshot data.
> TODOs:
> - XML file is no longer nicely indented
Cosmetic, and can be fixed later.
> - Fix esx driver
> - Fix vbox driver
Do these need to save domain xml state in the first place? They aren't
using libvirt to track domain state in the first time, but call out to
the hypervisor for everything. And if the hypervisor is already doing a
good job of reverting across configuration changes, then it doesn't hurt
if they continue to use just <domain>/<uuid> instead of full <domain>
in
the snapshot output that libvirt generates on virDomainSnapshotGetXMLDesc.
I don't have access to any ESX system, so I couldn't check. At least with our
(very) old VMWare Server when doing a snapshot, the configuration is saved,
so on revert you get the old configuration again. That difference was
actually what got us to implement this for Qemu as well.
VBox I didn't check: We're using it for another project I'm currently not
working on, but there libvirt isn't used to manage it.
> @@ -8694,9 +8705,17 @@ char *virDomainSnapshotDefFormat(char
> *domain_uuid, }
> virBufferVSprintf(&buf,
"<creationTime>%ld</creationTime>\n",
> def->creationTime);
> - virBufferAddLit(&buf, "<domain>\n");
> - virBufferVSprintf(&buf, "<uuid>%s</uuid>\n",
domain_uuid);
> - virBufferAddLit(&buf, "</domain>\n");
> + if (def->dom != NULL) {
> + xml = virDomainDefFormat(def->dom, VIR_DOMAIN_XML_INACTIVE |
> VIR_DOMAIN_XML_SECURE);
Security hole. You cannot blindly add VIR_DOMAIN_XML_SECURE if this is
destined to external output, rather, it has to be passed in from the
user's flags, and libvirt.c has to validate that
virDomainSnapshotGetXMLDesc rejects the flag on read-only connections.
Yes, but for a PoC that was the easiest thing to do. Glad you spotted that.
Sincerely
Philipp Hahn
--
Philipp Hahn Open Source Software Engineer hahn(a)univention.de
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 D-28359 Bremen fax: +49 421 22 232-99
http://www.univention.de/
1:21 a.m.
New subject: [libvirt] [PATCH 3/3] Snapshot: restore domain description from snapshot
Restore the domain description from the snapshot information.
TODOs:
- Only restart the KVM process when the snapshot is incompatible with
"loadvm". This would have the benefir of being able to switch saved
states very fast and also doesn't disconnect any VNC viewer.
Signed-off-by: Philipp Hahn <hahn(a)univention.de>
---
src/qemu/qemu_driver.c | 39 ++++++++++++++++++++++++++++++++++++++-
1 files changed, 38 insertions(+), 1 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 5041d32..5610961 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -6282,6 +6282,7 @@ static virDomainSnapshotPtr qemuDomainSnapshotCreateXML(virDomainPtr
domain,
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
+ virDomainDefPtr newDef = NULL;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr snapshot = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
@@ -6311,6 +6312,18 @@ static virDomainSnapshotPtr
qemuDomainSnapshotCreateXML(virDomainPtr domain,
if (!(def = virDomainSnapshotDefParseString(xmlDesc, 1, qemu_driver->caps)))
goto cleanup;
+ /* create copy */
+ if (!def->dom) {
+ char *xml = NULL;
+ if (!(xml = virDomainDefFormat(vm->def, VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE)))
+ goto cleanup;
+ newDef = virDomainDefParseString(driver->caps, xml, VIR_DOMAIN_XML_INACTIVE);
+ VIR_FREE(xml);
+ if (!newDef)
+ goto cleanup;
+ def->dom = newDef;
+ }
+
if (!(snap = virDomainSnapshotAssignDef(&vm->snapshots, def)))
goto cleanup;
@@ -6561,6 +6574,7 @@ static int qemuDomainRevertToSnapshot(virDomainSnapshotPtr
snapshot,
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
int rc;
+ virDomainDefPtr newDef = NULL;
virCheckFlags(0, -1);
@@ -6586,10 +6600,23 @@ static int qemuDomainRevertToSnapshot(virDomainSnapshotPtr
snapshot,
if (qemuDomainObjBeginJobWithDriver(driver, vm) < 0)
goto cleanup;
+ /* create copy */
+ if (snap->def->dom) {
+ char *xml = NULL;
+ /* TODO:Compare old definition to new definition to decide, if KVM must be
restarted or existing KVM can be reused. */
+ if (!(xml = virDomainDefFormat(snap->def->dom, VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE)))
+ goto cleanup;
+ newDef = virDomainDefParseString(driver->caps, xml, VIR_DOMAIN_XML_INACTIVE);
+ VIR_FREE(xml);
+ if (!newDef)
+ goto cleanup;
+ virDomainObjAssignDef(vm, newDef, false);
+ }
+
if (snap->def->state == VIR_DOMAIN_RUNNING
|| snap->def->state == VIR_DOMAIN_PAUSED) {
- if (virDomainObjIsActive(vm)) {
+ if (virDomainObjIsActive(vm) && !newDef) {
priv = vm->privateData;
qemuDomainObjEnterMonitorWithDriver(driver, vm);
rc = qemuMonitorLoadSnapshot(priv->mon, snap->def->name);
@@ -6598,6 +6625,16 @@ static int qemuDomainRevertToSnapshot(virDomainSnapshotPtr
snapshot,
goto endjob;
}
else {
+ if (virDomainObjIsActive(vm)) {
+ //qemudShutdownVMDaemon(driver, vm, 0); // <= 0.12.4
+ qemuProcessStop(driver, vm, 0); // >= 14
+ if (!vm->persistent) {
+ if (qemuDomainObjEndJob(vm) > 0)
+ virDomainRemoveInactive(&driver->domains, vm);
+ vm = NULL;
+ goto cleanup;
+ }
+ }
if (qemuDomainSnapshotSetCurrentActive(vm, driver->snapshotDir) < 0)
goto endjob;
--
1.7.1
2:10 a.m.
Hello Eric,
On Monday April, 11th 2011 23:39:05 Eric Blake wrote:
Are you referring to a disk snapshot, created via 'virsh
snapshot' on a
qcow2 image, or a memory snapshot, created via 'virsh save'?
The first one (snapshot).
So it sounds like you are talking about the 'virsh snapshot'
family of
commands. Indeed, there's probably quite a bit of work to do in that
code to make it more reliable.
See my proof-of-concept implementation, which I just posted for comments.
BYtE
Philipp
--
Philipp Hahn Open Source Software Engineer hahn(a)univention.de
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 D-28359 Bremen fax: +49 421 22 232-99
http://www.univention.de/
4878
days inactive
5129
days old
13 comments
2 participants
participants (2)
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Eric Blake -
Philipp Hahn