ktest: Add CONNECT_TIMEOUT to change the connection timeout time

Before ktest issues a reboot, it will try to connect to the target machine
to make sure that it is still alive. If the target does not respond within 5
seconds, it will power cycle the box instead of issuing a reboot.

Five seconds may be too short, and ktest may unnecessarially power cycle the
box. I have found 25 seconds seems to be a better timeout for this purpose.
But even 25 may be too arbitrary. Add a CONNECT_TIMEOUT option to let the
user determine the timeout time before rebooting. By default, it has been
raised to 25 seconds.

Signed-off-by: Steven Rostedt (VMware) <[email protected]>

tools/testing/ktest/ktest.pl

@@ -59,6 +59,7 @@
     "GRUB_REBOOT"		=> "grub2-reboot",
     "SYSLINUX"			=> "extlinux",
     "SYSLINUX_PATH"		=> "/boot/extlinux",
+    "CONNECT_TIMEOUT"		=> 25,
 
 # required, and we will ask users if they don't have them but we keep the default
 # value something that is common.
@@ -163,6 +164,7 @@
 my $store_successes;
 my $test_name;
 my $timeout;
+my $connect_timeout;
 my $booted_timeout;
 my $detect_triplefault;
 my $console;
@@ -296,6 +298,7 @@
     "STORE_SUCCESSES"		=> \$store_successes,
     "TEST_NAME"			=> \$test_name,
     "TIMEOUT"			=> \$timeout,
+    "CONNECT_TIMEOUT"		=> \$connect_timeout,
     "BOOTED_TIMEOUT"		=> \$booted_timeout,
     "CONSOLE"			=> \$console,
     "CLOSE_CONSOLE_SIGNAL"	=> \$close_console_signal,
@@ -1328,8 +1331,8 @@ sub reboot {
     my ($time) = @_;
     my $powercycle = 0;
 
-    # test if the machine can be connected to within 5 seconds
-    my $stat = run_ssh("echo check machine status", 5);
+    # test if the machine can be connected to within a few seconds
+    my $stat = run_ssh("echo check machine status", $connect_timeout);
     if (!$stat) {
 	doprint("power cycle\n");
 	$powercycle = 1;

tools/testing/ktest/sample.conf

@@ -725,6 +725,13 @@
 # (default 120)
 #TIMEOUT = 120
 
+# The timeout in seconds when to test if the box can be rebooted
+# or not. Before issuing the reboot command, a ssh connection
+# is attempted to see if the target machine is still active.
+# If the target does not connect within this timeout, a power cycle
+# is issued instead of a reboot.
+# CONNECT_TIMEOUT = 25
+
 # In between tests, a reboot of the box may occur, and this
 # is the time to wait for the console after it stops producing
 # output. Some machines may not produce a large lag on reboot