mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-07-06 18:05:45 +00:00
Snapshot virsh implementation.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
This commit is contained in:
Chris Lalancette
parent
c572222a14
commit
88151c7cbc
452
tools/virsh.c
452
tools/virsh.c
@ -49,6 +49,7 @@
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#include "console.h"
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#include "util.h"
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#include "memory.h"
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#include "xml.h"
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static char *progname;
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@ -8174,6 +8175,449 @@ cmdQuit(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
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return TRUE;
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}
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/*
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* "snapshot-create" command
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*/
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static const vshCmdInfo info_snapshot_create[] = {
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{"help", N_("Create a snapshot")},
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{"desc", N_("Snapshot create")},
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{NULL, NULL}
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};
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static const vshCmdOptDef opts_snapshot_create[] = {
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{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
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{"xmlfile", VSH_OT_DATA, 0, N_("domain snapshot XML")},
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{NULL, 0, 0, NULL}
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};
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static int
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cmdSnapshotCreate(vshControl *ctl, const vshCmd *cmd)
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{
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virDomainPtr dom = NULL;
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int ret = FALSE;
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char *from;
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char *buffer = NULL;
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virDomainSnapshotPtr snapshot = NULL;
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xmlDocPtr xml = NULL;
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xmlXPathContextPtr ctxt = NULL;
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char *doc = NULL;
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char *name = NULL;
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if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
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goto cleanup;
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dom = vshCommandOptDomain(ctl, cmd, NULL);
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if (dom == NULL)
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goto cleanup;
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from = vshCommandOptString(cmd, "xmlfile", NULL);
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if (from == NULL)
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buffer = strdup("<domainsnapshot/>");
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else {
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if (virFileReadAll(from, VIRSH_MAX_XML_FILE, &buffer) < 0) {
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/* we have to report the error here because during cleanup
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* we'll run through virDomainFree(), which loses the
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* last error
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*/
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virshReportError(ctl);
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goto cleanup;
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}
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}
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if (buffer == NULL) {
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vshError(ctl, "%s", _("Out of memory"));
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goto cleanup;
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}
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snapshot = virDomainSnapshotCreateXML(dom, buffer, 0);
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if (snapshot == NULL)
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goto cleanup;
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doc = virDomainSnapshotGetXMLDesc(snapshot, 0);
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if (!doc)
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goto cleanup;
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xml = xmlReadDoc((const xmlChar *) doc, "domainsnapshot.xml", NULL,
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XML_PARSE_NOENT | XML_PARSE_NONET |
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XML_PARSE_NOWARNING);
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if (!xml)
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goto cleanup;
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ctxt = xmlXPathNewContext(xml);
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if (!ctxt)
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goto cleanup;
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name = virXPathString("string(/domainsnapshot/name)", ctxt);
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if (!name) {
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vshError(ctl, "%s",
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_("Could not find 'name' element in domain snapshot XML"));
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goto cleanup;
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}
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vshPrint(ctl, _("Domain snapshot %s created"), name);
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if (from)
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vshPrint(ctl, _(" from '%s'"), from);
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vshPrint(ctl, "\n");
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ret = TRUE;
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cleanup:
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VIR_FREE(name);
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xmlXPathFreeContext(ctxt);
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if (xml)
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xmlFreeDoc(xml);
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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VIR_FREE(doc);
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VIR_FREE(buffer);
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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/*
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* "snapshot-current" command
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*/
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static const vshCmdInfo info_snapshot_current[] = {
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{"help", N_("Get the current snapshot")},
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{"desc", N_("Get the current snapshot")},
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{NULL, NULL}
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};
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static const vshCmdOptDef opts_snapshot_current[] = {
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{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
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{NULL, 0, 0, NULL}
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};
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static int
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cmdSnapshotCurrent(vshControl *ctl, const vshCmd *cmd)
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{
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virDomainPtr dom = NULL;
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int ret = FALSE;
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int current;
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virDomainSnapshotPtr snapshot = NULL;
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if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
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goto cleanup;
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dom = vshCommandOptDomain(ctl, cmd, NULL);
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if (dom == NULL)
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goto cleanup;
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current = virDomainHasCurrentSnapshot(dom, 0);
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if (current < 0)
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goto cleanup;
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else if (current) {
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char *xml;
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if (!(snapshot = virDomainSnapshotCurrent(dom, 0)))
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goto cleanup;
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xml = virDomainSnapshotGetXMLDesc(snapshot, 0);
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if (!xml)
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goto cleanup;
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vshPrint(ctl, "%s", xml);
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VIR_FREE(xml);
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}
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ret = TRUE;
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cleanup:
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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/*
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* "snapshot-list" command
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*/
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static const vshCmdInfo info_snapshot_list[] = {
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{"help", N_("List snapshots for a domain")},
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{"desc", N_("Snapshot List")},
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{NULL, NULL}
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};
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static const vshCmdOptDef opts_snapshot_list[] = {
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{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
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{NULL, 0, 0, NULL}
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};
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static int
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cmdSnapshotList(vshControl *ctl, const vshCmd *cmd)
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{
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virDomainPtr dom = NULL;
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int ret = FALSE;
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int numsnaps;
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char **names = NULL;
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int actual;
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int i;
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xmlDocPtr xml = NULL;
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xmlXPathContextPtr ctxt = NULL;
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char *doc = NULL;
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virDomainSnapshotPtr snapshot = NULL;
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char *state = NULL;
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long creation;
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char timestr[100];
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struct tm time_info;
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if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
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goto cleanup;
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dom = vshCommandOptDomain(ctl, cmd, NULL);
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if (dom == NULL)
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goto cleanup;
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numsnaps = virDomainSnapshotNum(dom, 0);
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if (numsnaps < 0)
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goto cleanup;
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vshPrint(ctl, " %-20s %-25s %s\n", _("Name"), _("Creation Time"), _("State"));
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vshPrint(ctl, "---------------------------------------------------\n");
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if (numsnaps) {
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if (VIR_ALLOC_N(names, numsnaps) < 0)
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goto cleanup;
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actual = virDomainSnapshotListNames(dom, names, numsnaps, 0);
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if (actual < 0)
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goto cleanup;
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qsort(&names[0], actual, sizeof(char*), namesorter);
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for (i = 0; i < actual; i++) {
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/* free up memory from previous iterations of the loop */
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VIR_FREE(state);
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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xmlXPathFreeContext(ctxt);
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if (xml)
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xmlFreeDoc(xml);
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VIR_FREE(doc);
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snapshot = virDomainSnapshotLookupByName(dom, names[i], 0);
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if (snapshot == NULL)
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continue;
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doc = virDomainSnapshotGetXMLDesc(snapshot, 0);
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if (!doc)
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continue;
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xml = xmlReadDoc((const xmlChar *) doc, "domainsnapshot.xml", NULL,
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XML_PARSE_NOENT | XML_PARSE_NONET |
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XML_PARSE_NOWARNING);
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if (!xml)
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continue;
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ctxt = xmlXPathNewContext(xml);
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if (!ctxt)
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continue;
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state = virXPathString("string(/domainsnapshot/state)", ctxt);
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if (state == NULL)
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continue;
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if (virXPathLong("string(/domainsnapshot/creationTime)", ctxt,
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&creation) < 0)
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continue;
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localtime_r(&creation, &time_info);
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strftime(timestr, sizeof(timestr), "%F %T %z", &time_info);
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vshPrint(ctl, " %-20s %-25s %s\n", names[i], timestr, state);
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}
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}
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ret = TRUE;
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cleanup:
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/* this frees up memory from the last iteration of the loop */
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VIR_FREE(state);
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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xmlXPathFreeContext(ctxt);
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if (xml)
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xmlFreeDoc(xml);
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VIR_FREE(doc);
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VIR_FREE(names);
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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/*
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* "snapshot-dumpxml" command
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*/
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static const vshCmdInfo info_snapshot_dumpxml[] = {
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{"help", N_("Dump XML for a domain snapshot")},
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{"desc", N_("Snapshot Dump XML")},
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{NULL, NULL}
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};
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static const vshCmdOptDef opts_snapshot_dumpxml[] = {
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{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
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{"snapshotname", VSH_OT_DATA, VSH_OFLAG_REQ, N_("snapshot name")},
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{NULL, 0, 0, NULL}
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};
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static int
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cmdSnapshotDumpXML(vshControl *ctl, const vshCmd *cmd)
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{
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virDomainPtr dom = NULL;
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int ret = FALSE;
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char *name;
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virDomainSnapshotPtr snapshot = NULL;
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char *xml = NULL;
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if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
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goto cleanup;
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dom = vshCommandOptDomain(ctl, cmd, NULL);
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if (dom == NULL)
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goto cleanup;
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name = vshCommandOptString(cmd, "snapshotname", NULL);
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if (name == NULL) {
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vshError(ctl, "%s", _("missing snapshotname"));
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goto cleanup;
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}
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snapshot = virDomainSnapshotLookupByName(dom, name, 0);
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if (snapshot == NULL)
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goto cleanup;
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xml = virDomainSnapshotGetXMLDesc(snapshot, 0);
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if (!xml)
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goto cleanup;
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printf("%s", xml);
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ret = TRUE;
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cleanup:
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VIR_FREE(xml);
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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/*
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* "revert-to-snapshot" command
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*/
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static const vshCmdInfo info_revert_to_snapshot[] = {
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{"help", N_("Revert a domain to a snapshot")},
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{"desc", N_("Revert domain to snapshot")},
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{NULL, NULL}
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};
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static const vshCmdOptDef opts_revert_to_snapshot[] = {
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{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
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{"snapshotname", VSH_OT_DATA, VSH_OFLAG_REQ, N_("snapshot name")},
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{NULL, 0, 0, NULL}
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};
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static int
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cmdDomainRevertToSnapshot(vshControl *ctl, const vshCmd *cmd)
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{
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virDomainPtr dom = NULL;
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int ret = FALSE;
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char *name;
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virDomainSnapshotPtr snapshot = NULL;
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if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
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goto cleanup;
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dom = vshCommandOptDomain(ctl, cmd, NULL);
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if (dom == NULL)
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goto cleanup;
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name = vshCommandOptString(cmd, "snapshotname", NULL);
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if (name == NULL) {
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vshError(ctl, "%s", _("missing snapshotname"));
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goto cleanup;
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}
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snapshot = virDomainSnapshotLookupByName(dom, name, 0);
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if (snapshot == NULL)
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goto cleanup;
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if (virDomainRevertToSnapshot(snapshot, 0) < 0)
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goto cleanup;
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ret = TRUE;
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cleanup:
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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/*
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* "snapshot-delete" command
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*/
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static const vshCmdInfo info_snapshot_delete[] = {
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{"help", N_("Delete a domain snapshot")},
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{"desc", N_("Snapshot Delete")},
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{NULL, NULL}
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};
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static const vshCmdOptDef opts_snapshot_delete[] = {
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{"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
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{"snapshotname", VSH_OT_DATA, VSH_OFLAG_REQ, N_("snapshot name")},
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{"children", VSH_OT_BOOL, 0, N_("delete snapshot and all children")},
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{NULL, 0, 0, NULL}
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};
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static int
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cmdSnapshotDelete(vshControl *ctl, const vshCmd *cmd)
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{
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virDomainPtr dom = NULL;
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int ret = FALSE;
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char *name;
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virDomainSnapshotPtr snapshot = NULL;
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unsigned int flags = 0;
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if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
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goto cleanup;
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dom = vshCommandOptDomain(ctl, cmd, NULL);
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if (dom == NULL)
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goto cleanup;
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name = vshCommandOptString(cmd, "snapshotname", NULL);
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if (name == NULL) {
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vshError(ctl, "%s", _("missing snapshotname"));
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goto cleanup;
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}
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if (vshCommandOptBool(cmd, "children"))
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flags |= VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN;
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snapshot = virDomainSnapshotLookupByName(dom, name, 0);
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if (snapshot == NULL)
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goto cleanup;
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if (virDomainSnapshotDelete(snapshot, flags) < 0)
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goto cleanup;
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ret = TRUE;
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cleanup:
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if (snapshot)
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virDomainSnapshotFree(snapshot);
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if (dom)
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virDomainFree(dom);
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return ret;
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}
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/*
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* Commands
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*/
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@ -8328,6 +8772,14 @@ static const vshCmdDef commands[] = {
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{"vcpupin", cmdVcpupin, opts_vcpupin, info_vcpupin},
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{"version", cmdVersion, NULL, info_version},
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{"vncdisplay", cmdVNCDisplay, opts_vncdisplay, info_vncdisplay},
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{"snapshot-create", cmdSnapshotCreate, opts_snapshot_create, info_snapshot_create},
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{"snapshot-current", cmdSnapshotCurrent, opts_snapshot_current, info_snapshot_current},
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{"snapshot-delete", cmdSnapshotDelete, opts_snapshot_delete, info_snapshot_delete},
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{"snapshot-dumpxml", cmdSnapshotDumpXML, opts_snapshot_dumpxml, info_snapshot_dumpxml},
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{"snapshot-list", cmdSnapshotList, opts_snapshot_list, info_snapshot_list},
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{"revert-to-snapshot", cmdDomainRevertToSnapshot, opts_revert_to_snapshot, info_revert_to_snapshot},
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{NULL, NULL, NULL, NULL}
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};
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