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[libvirt] [RFC PATCH 7/8] Snapshot virsh implementation.



Signed-off-by: Chris Lalancette <clalance redhat com>
---
 tools/virsh.c |  367 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 367 insertions(+), 0 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index 5c56fa6..1eb4bef 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -49,6 +49,7 @@
 #include "console.h"
 #include "util.h"
 #include "memory.h"
+#include "ignore-value.h"
 
 static char *progname;
 
@@ -8137,6 +8138,364 @@ cmdQuit(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
 }
 
 /*
+ * "snapshot-create" command
+ */
+static const vshCmdInfo info_snapshot_create[] = {
+    {"help", N_("Create a snapshot")},
+    {"desc", N_("Snapshot create")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_snapshot_create[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {"file", VSH_OT_DATA, 0, N_("domain snapshot XML")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdSnapshotCreate(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    int ret = FALSE;
+    char *from;
+    char *buffer = NULL;
+    virDomainSnapshotPtr snapshot;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        goto cleanup;
+
+    dom = vshCommandOptDomain(ctl, cmd, NULL);
+    if (dom == NULL)
+        goto cleanup;
+
+    from = vshCommandOptString(cmd, "file", NULL);
+    if (from == NULL)
+        buffer = strdup("<domainsnapshot/>");
+    else
+        ignore_value(virFileReadAll(from, VIRSH_MAX_XML_FILE, &buffer));
+    if (buffer == NULL)
+        goto cleanup;
+
+    snapshot = virDomainSnapshotCreateXML(dom, buffer, 0);
+    if (snapshot == NULL)
+        goto cleanup;
+
+    virDomainSnapshotFree(snapshot);
+
+    ret = TRUE;
+
+cleanup:
+    VIR_FREE(buffer);
+    if (dom)
+        virDomainFree(dom);
+
+    return ret;
+}
+
+/*
+ * "snapshot-current" command
+ */
+static const vshCmdInfo info_snapshot_current[] = {
+    {"help", N_("Get the current snapshot")},
+    {"desc", N_("Get the current snapshot")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_snapshot_current[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdSnapshotCurrent(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    int ret = FALSE;
+    int current;
+    virDomainSnapshotPtr snapshot = NULL;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        goto cleanup;
+
+    dom = vshCommandOptDomain(ctl, cmd, NULL);
+    if (dom == NULL)
+        goto cleanup;
+
+    current = virDomainHasCurrentSnapshot(dom, 0);
+    if (current < 0)
+        goto cleanup;
+    else if (current) {
+        char *xml;
+
+        if (!(snapshot = virDomainSnapshotCurrent(dom, 0)))
+            goto cleanup;
+
+        xml = virDomainSnapshotGetXMLDesc(snapshot, 0);
+        if (!xml)
+            goto cleanup;
+
+        vshPrint(ctl, "%s", xml);
+        VIR_FREE(xml);
+    }
+
+    ret = TRUE;
+
+cleanup:
+    if (snapshot)
+        virDomainSnapshotFree(snapshot);
+    if (dom)
+        virDomainFree(dom);
+
+    return ret;
+}
+
+/*
+ * "snapshot-list" command
+ */
+static const vshCmdInfo info_snapshot_list[] = {
+    {"help", N_("List snapshots for a domain")},
+    {"desc", N_("Snapshot List")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_snapshot_list[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdSnapshotList(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    int ret = FALSE;
+    int numsnaps;
+    char **names = NULL;
+    int actual;
+    int i;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        goto cleanup;
+
+    dom = vshCommandOptDomain(ctl, cmd, NULL);
+    if (dom == NULL)
+        goto cleanup;
+
+    numsnaps = virDomainSnapshotNum(dom, 0);
+
+    if (numsnaps < 0)
+        goto cleanup;
+
+    if (numsnaps) {
+        if (VIR_ALLOC_N(names, numsnaps) < 0)
+            goto cleanup;
+
+        actual = virDomainSnapshotListNames(dom, names, numsnaps, 0);
+        if (actual < 0)
+            goto cleanup;
+
+        for (i = 0; i < actual; i++)
+            vshPrint(ctl, "%d: %s\n", i, names[i]);
+    }
+
+    ret = TRUE;
+
+cleanup:
+    VIR_FREE(names);
+    if (dom)
+        virDomainFree(dom);
+
+    return ret;
+}
+
+/*
+ * "snapshot-dumpxml" command
+ */
+static const vshCmdInfo info_snapshot_dumpxml[] = {
+    {"help", N_("Dump XML for a domain snapshot")},
+    {"desc", N_("Snapshot Dump XML")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_snapshot_dumpxml[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {"name", VSH_OT_DATA, VSH_OFLAG_REQ, N_("snapshot name")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdSnapshotDumpXML(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    int ret = FALSE;
+    char *name;
+    virDomainSnapshotPtr snapshot = NULL;
+    char *xml = NULL;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        goto cleanup;
+
+    dom = vshCommandOptDomain(ctl, cmd, NULL);
+    if (dom == NULL)
+        goto cleanup;
+
+    name = vshCommandOptString(cmd, "name", NULL);
+    if (name == NULL)
+        goto cleanup;
+
+    snapshot = virDomainSnapshotLookupByName(dom, name, 0);
+    if (snapshot == NULL)
+        goto cleanup;
+
+    xml = virDomainSnapshotGetXMLDesc(snapshot, 0);
+    if (!xml)
+        goto cleanup;
+
+    printf("%s", xml);
+
+    ret = TRUE;
+
+cleanup:
+    VIR_FREE(xml);
+    if (snapshot)
+        virDomainSnapshotFree(snapshot);
+    if (dom)
+        virDomainFree(dom);
+
+    return ret;
+}
+
+/*
+ * "start-from-snapshot" command
+ */
+static const vshCmdInfo info_start_from_snapshot[] = {
+    {"help", N_("Start a domain from a snapshot")},
+    {"desc", N_("Domain start from snapshot")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_start_from_snapshot[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {"name", VSH_OT_DATA, VSH_OFLAG_REQ, N_("snapshot name")},
+#ifndef WIN32
+    {"console", VSH_OT_BOOL, 0, N_("attach to console after creation")},
+#endif
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdDomainStartFromSnapshot(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    int ret = FALSE;
+    char *name;
+    virDomainSnapshotPtr snapshot = NULL;
+#ifndef WIN32
+    int console = vshCommandOptBool(cmd, "console");
+#endif
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        goto cleanup;
+
+    dom = vshCommandOptDomain(ctl, cmd, NULL);
+    if (dom == NULL)
+        goto cleanup;
+
+    name = vshCommandOptString(cmd, "name", NULL);
+    if (name == NULL)
+        goto cleanup;
+
+    snapshot = virDomainSnapshotLookupByName(dom, name, 0);
+    if (snapshot == NULL)
+        goto cleanup;
+
+    if (virDomainCreateFromSnapshot(snapshot, 0) < 0)
+        goto cleanup;
+
+#ifndef WIN32
+    if (console)
+        cmdRunConsole(ctl, dom);
+#endif
+
+    ret = TRUE;
+
+cleanup:
+    if (snapshot)
+        virDomainSnapshotFree(snapshot);
+    if (dom)
+        virDomainFree(dom);
+
+    return ret;
+}
+
+/*
+ * "snapshot-delete" command
+ */
+static const vshCmdInfo info_snapshot_delete[] = {
+    {"help", N_("Delete a domain snapshot")},
+    {"desc", N_("Snapshot Delete")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_snapshot_delete[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {"name", VSH_OT_DATA, VSH_OFLAG_REQ, N_("snapshot name")},
+    {"merge", VSH_OT_BOOL, 0, N_("merge snapshot")},
+    {"delete", VSH_OT_BOOL, 0, N_("delete snapshot")},
+    {"merge-force", VSH_OT_BOOL, 0, N_("merge snapshot, discard children")},
+    {"delete-force", VSH_OT_BOOL, 0, N_("delete snapshot and all children")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdSnapshotDelete(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    int ret = FALSE;
+    char *name;
+    virDomainSnapshotPtr snapshot = NULL;
+    unsigned int flags = 0;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        goto cleanup;
+
+    dom = vshCommandOptDomain(ctl, cmd, NULL);
+    if (dom == NULL)
+        goto cleanup;
+
+    name = vshCommandOptString(cmd, "name", NULL);
+    if (name == NULL)
+        goto cleanup;
+
+    if (vshCommandOptBool(cmd, "merge"))
+        flags |= VIR_DOMAIN_SNAPSHOT_DELETE_MERGE;
+    if (vshCommandOptBool(cmd, "delete"))
+        flags |= VIR_DOMAIN_SNAPSHOT_DELETE_DISCARD;
+    if (vshCommandOptBool(cmd, "merge-force"))
+        flags |= VIR_DOMAIN_SNAPSHOT_DELETE_MERGE_FORCE;
+    if (vshCommandOptBool(cmd, "delete-force"))
+        flags |= VIR_DOMAIN_SNAPSHOT_DELETE_DISCARD_FORCE;
+
+    /* FIXME: throw an error if more than one flag is passed */
+
+    snapshot = virDomainSnapshotLookupByName(dom, name, 0);
+    if (snapshot == NULL)
+        goto cleanup;
+
+    if (virDomainSnapshotDelete(snapshot, flags) < 0)
+        goto cleanup;
+
+    ret = TRUE;
+
+cleanup:
+    if (snapshot)
+        virDomainSnapshotFree(snapshot);
+    if (dom)
+        virDomainFree(dom);
+
+    return ret;
+}
+
+/*
  * Commands
  */
 static const vshCmdDef commands[] = {
@@ -8288,6 +8647,14 @@ static const vshCmdDef commands[] = {
     {"vcpupin", cmdVcpupin, opts_vcpupin, info_vcpupin},
     {"version", cmdVersion, NULL, info_version},
     {"vncdisplay", cmdVNCDisplay, opts_vncdisplay, info_vncdisplay},
+
+    {"snapshot-create", cmdSnapshotCreate, opts_snapshot_create, info_snapshot_create},
+    {"snapshot-current", cmdSnapshotCurrent, opts_snapshot_current, info_snapshot_current},
+    {"snapshot-delete", cmdSnapshotDelete, opts_snapshot_delete, info_snapshot_delete},
+    {"snapshot-dumpxml", cmdSnapshotDumpXML, opts_snapshot_dumpxml, info_snapshot_dumpxml},
+    {"snapshot-list", cmdSnapshotList, opts_snapshot_list, info_snapshot_list},
+    {"start-from-snapshot", cmdDomainStartFromSnapshot, opts_start_from_snapshot, info_start_from_snapshot},
+
     {NULL, NULL, NULL, NULL}
 };
 
-- 
1.6.6.1


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