[libvirt] [PATCH v3 3/3] virsh: Add support for virDomainMigrateGetMaxDowntime

[Scott Garfinkle]

From: Scott Garfinkle <seg at us.ibm.com>

---
 tools/virsh-domain.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 tools/virsh.pod      | 18 ++++++++++++++++++
 2 files changed, 64 insertions(+)

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 0684979..10fdd0f 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -10720,6 +10720,46 @@ cmdMigrateSetMaxDowntime(vshControl *ctl, const vshCmd *cmd)
 }
 
 /*
+ * "migrate-getmaxdowntime" command
+ */
+static const vshCmdInfo info_migrate_getmaxdowntime[] = {
+    {.name = "help",
+     .data = N_("get maximum tolerable downtime")
+    },
+    {.name = "desc",
+     .data = N_("Get maximum tolerable downtime (in milliseconds)for a domain which is being live-migrated to another host.")
+    },
+    {.name = NULL}
+};
+
+static const vshCmdOptDef opts_migrate_getmaxdowntime[] = {
+    VIRSH_COMMON_OPT_DOMAIN_FULL,
+    {.name = NULL}
+};
+
+static bool
+cmdMigrateGetMaxDowntime(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom = NULL;
+    unsigned long long downtime;
+    bool ret = false;
+
+    if (!(dom = virshCommandOptDomain(ctl, cmd, NULL)))
+        return false;
+
+    if (virDomainMigrateGetMaxDowntime(dom, &downtime, 0))
+        goto done;
+
+    vshPrint(ctl, "%llu\n", downtime);
+
+    ret = true;
+
+ done:
+    virshDomainFree(dom);
+    return ret;
+}
+
+/*
  * "migrate-compcache" command
  */
 static const vshCmdInfo info_migrate_compcache[] = {
@@ -13845,6 +13885,12 @@ const vshCmdDef domManagementCmds[] = {
      .info = info_migrate_setmaxdowntime,
      .flags = 0
     },
+    {.name = "migrate-getmaxdowntime",
+     .handler = cmdMigrateGetMaxDowntime,
+     .opts = opts_migrate_getmaxdowntime,
+     .info = info_migrate_getmaxdowntime,
+     .flags = 0
+    },
     {.name = "migrate-compcache",
      .handler = cmdMigrateCompCache,
      .opts = opts_migrate_compcache,
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 43d6f0c..fc0a46c 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1869,6 +1869,24 @@ is supposed to be used while the domain is being live-migrated as a reaction
 to migration progress and increasing number of compression cache misses
 obtained from domjobinfo.
 
+=item B<migrate-getmaxdowntime> I<domain>
+
+Get the maximum tolerable downtime for a domain which is being live-migrated to
+another host.  This is the number of milliseconds the guest is allowed
+to be down at the end of live migration.
+
+=item B<migrate-compcache> I<domain> [I<--size> B<bytes>]
+
+Sets and/or gets size of the cache (in bytes) used for compressing repeatedly
+transferred memory pages during live migration. When called without I<size>,
+the command just prints current size of the compression cache. When I<size>
+is specified, the hypervisor is asked to change compression cache to I<size>
+bytes and then the current size is printed (the result may differ from the
+requested size due to rounding done by the hypervisor). The I<size> option
+is supposed to be used while the domain is being live-migrated as a reaction
+to migration progress and increasing number of compression cache misses
+obtained from domjobinfo.
+
 =item B<migrate-setspeed> I<domain> I<bandwidth>
 
 Set the maximum migration bandwidth (in MiB/s) for a domain which is being
-- 
1.8.3.1