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snapshot: refactor virsh snapshot creation

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The next patch will make snapshot creation more complex, so it's
better to avoid repetition of the complexity.

* tools/virsh.c (vshSnapshotCreate): New helper function.
(cmdSnapshotCreate, cmdSnapshotCreateAs): Use it.
This commit is contained in:
Eric Blake 2011-08-18 14:07:43 -06:00
parent af65695af0
commit 90ec08ed73
1 changed files with 50 additions and 69 deletions
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119
tools/virsh.c
View File

@ -11915,6 +11915,54 @@ cmdQuit(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
return true;
}
/* Helper for snapshot-create and snapshot-create-as */
static bool
vshSnapshotCreate(vshControl *ctl, virDomainPtr dom, const char *buffer,
unsigned int flags, const char *from)
{
bool ret = false;
virDomainSnapshotPtr snapshot;
char *doc = NULL;
xmlDocPtr xml = NULL;
xmlXPathContextPtr ctxt = NULL;
char *name = NULL;
snapshot = virDomainSnapshotCreateXML(dom, buffer, flags);
if (snapshot == NULL)
goto cleanup;
doc = virDomainSnapshotGetXMLDesc(snapshot, 0);
if (!doc)
goto cleanup;
xml = virXMLParseStringCtxt(doc, "domainsnapshot.xml", &ctxt);
if (!xml)
goto cleanup;
name = virXPathString("string(/domainsnapshot/name)", ctxt);
if (!name) {
vshError(ctl, "%s",
_("Could not find 'name' element in domain snapshot XML"));
goto cleanup;
}
if (from)
vshPrint(ctl, _("Domain snapshot %s created from '%s'"), name, from);
else
vshPrint(ctl, _("Domain snapshot %s created"), name);
ret = true;
cleanup:
VIR_FREE(name);
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml);
if (snapshot)
virDomainSnapshotFree(snapshot);
VIR_FREE(doc);
return ret;
}
/*
* "snapshot-create" command
*/
@ -11937,11 +11985,6 @@ cmdSnapshotCreate(vshControl *ctl, const vshCmd *cmd)
bool ret = false;
const char *from = NULL;
char *buffer = NULL;
virDomainSnapshotPtr snapshot = NULL;
xmlDocPtr xml = NULL;
xmlXPathContextPtr ctxt = NULL;
char *doc = NULL;
char *name = NULL;
if (!vshConnectionUsability(ctl, ctl->conn))
goto cleanup;
@ -11967,39 +12010,9 @@ cmdSnapshotCreate(vshControl *ctl, const vshCmd *cmd)
goto cleanup;
}
snapshot = virDomainSnapshotCreateXML(dom, buffer, 0);
if (snapshot == NULL)
goto cleanup;
doc = virDomainSnapshotGetXMLDesc(snapshot, 0);
if (!doc)
goto cleanup;
xml = virXMLParseStringCtxt(doc, "domainsnapshot.xml", &ctxt);
if (!xml)
goto cleanup;
name = virXPathString("string(/domainsnapshot/name)", ctxt);
if (!name) {
vshError(ctl, "%s",
_("Could not find 'name' element in domain snapshot XML"));
goto cleanup;
}
vshPrint(ctl, _("Domain snapshot %s created"), name);
if (from)
vshPrint(ctl, _(" from '%s'"), from);
vshPrint(ctl, "\n");
ret = true;
ret = vshSnapshotCreate(ctl, dom, buffer, 0, from);
cleanup:
VIR_FREE(name);
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml);
if (snapshot)
virDomainSnapshotFree(snapshot);
VIR_FREE(doc);
VIR_FREE(buffer);
if (dom)
virDomainFree(dom);
@ -12030,13 +12043,8 @@ cmdSnapshotCreateAs(vshControl *ctl, const vshCmd *cmd)
virDomainPtr dom = NULL;
bool ret = false;
char *buffer = NULL;
virDomainSnapshotPtr snapshot = NULL;
xmlDocPtr xml = NULL;
xmlXPathContextPtr ctxt = NULL;
char *doc = NULL;
const char *name = NULL;
const char *desc = NULL;
char *parsed_name = NULL;
virBuffer buf = VIR_BUFFER_INITIALIZER;
if (!vshConnectionUsability(ctl, ctl->conn))
@ -12071,36 +12079,9 @@ cmdSnapshotCreateAs(vshControl *ctl, const vshCmd *cmd)
goto cleanup;
}
snapshot = virDomainSnapshotCreateXML(dom, buffer, 0);
if (snapshot == NULL)
goto cleanup;
doc = virDomainSnapshotGetXMLDesc(snapshot, 0);
if (!doc)
goto cleanup;
xml = virXMLParseStringCtxt(doc, "domainsnapshot.xml", &ctxt);
if (!xml)
goto cleanup;
parsed_name = virXPathString("string(/domainsnapshot/name)", ctxt);
if (!parsed_name) {
vshError(ctl, "%s",
_("Could not find 'name' element in domain snapshot XML"));
goto cleanup;
}
vshPrint(ctl, _("Domain snapshot %s created\n"), name ? name : parsed_name);
ret = true;
ret = vshSnapshotCreate(ctl, dom, buffer, 0, NULL);
cleanup:
VIR_FREE(parsed_name);
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml);
if (snapshot)
virDomainSnapshotFree(snapshot);
VIR_FREE(doc);
VIR_FREE(buffer);
if (dom)
virDomainFree(dom);