KVM autotest: add boot_savevm test

[Marcelo Tosatti <mtosatti@redhat.com>]

This test boots a guest while periodically running savevm/loadvm.

Adjust savevm_delay/guest memory size to reduce run time, if 
excessive.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: autotest/client/tests/kvm/tests/boot_savevm.py
===================================================================
--- /dev/null
+++ autotest/client/tests/kvm/tests/boot_savevm.py
@@ -0,0 +1,54 @@
+import logging, time
+from autotest_lib.client.common_lib import error
+import kvm_subprocess, kvm_test_utils, kvm_utils
+
+def run_boot_savevm(test, params, env):
+    """
+    KVM boot savevm test:
+    1) Start guest
+    2) Periodically savevm/loadvm
+    4) Log into the guest to verify it's up, fail after timeout seconds
+
+    @param test: kvm test object
+    @param params: Dictionary with the test parameters
+    @param env: Dictionary with test environment.
+    """
+    vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
+    savevm_delay = float(params.get("savevm_delay"))
+    savevm_login_delay = float(params.get("savevm_login_delay"))
+    logging.info("savevm_delay = %f" % savevm_delay)
+    login_expire = time.time() + savevm_login_delay
+    end_time = time.time() + float(params.get("savevm_timeout"))
+
+    while time.time() < end_time:
+        time.sleep(savevm_delay)
+
+        s, o = vm.send_monitor_cmd("stop")
+        if s:
+            logging.error("stop failed: %r" % o)
+        s, o = vm.send_monitor_cmd("savevm 1")
+        if s:
+            logging.error("savevm failed: %r" % o)
+        s, o = vm.send_monitor_cmd("system_reset")
+        if s:
+            logging.error("system_reset: %r" % o)
+        s, o = vm.send_monitor_cmd("loadvm 1")
+        if s:
+            logging.error("loadvm failed: %r" % o)
+        s, o = vm.send_monitor_cmd("cont")
+        if s:
+            logging.error("cont failed: %r" % o)
+
+         # Log in
+        if (time.time() > login_expire):
+            login_expire = time.time() + savevm_login_delay
+            logging.info("Logging in after loadvm...")
+            session = kvm_utils.wait_for(vm.remote_login, 1, 0, 1)
+            if not session:
+                logging.info("Failed to login")
+            else:
+                logging.info("Logged in to guest!")
+                break
+
+    if (time.time() > end_time):
+        raise error.TestFail("fail: timeout")
Index: autotest/client/tests/kvm/tests_base.cfg.sample
===================================================================
--- autotest.orig/client/tests/kvm/tests_base.cfg.sample
+++ autotest/client/tests/kvm/tests_base.cfg.sample
@@ -105,6 +105,15 @@ variants:
         iterations = 2
         used_mem = 1024
 
+    - boot_savevm: install setup unattended_install
+        type = boot_savevm
+        savevm_delay = 0.3
+        savevm_login_delay = 120
+        savevm_timeout = 2000
+        kill_vm_on_error = yes
+        kill_vm_gracefully = yes
+        kill_vm = yes
+
     - autotest:     install setup unattended_install
         type = autotest
         test_timeout = 1800