ktest: Add support for grub2

As only grub or 'script' is supported for rebooting to a new kernel,
and Fedora 17 has dropped support for grub, I decided to add grub2
support as well (I also plan on adding syslinux/extlinux support too).

The options GRUB_FILE and GRUB_REBOOT were added to allow the user
to specify where to find the grub.cfg and what tool to use to reboot
into the next kernel respectively.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2 files changed, 91 insertions, 4 deletions

diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index c7ba7614061b..63245a56aca3 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -53,6 +53,7 @@ my %default = (
     "STOP_AFTER_FAILURE"        => 60,
     "STOP_TEST_AFTER"           => 600,
     "MAX_MONITOR_WAIT"          => 1800,
+    "GRUB_REBOOT"               => "grub2-reboot",
 
 # required, and we will ask users if they don't have them but we keep the default
 # value something that is common.
@@ -105,7 +106,9 @@ my $scp_to_target;
 my $scp_to_target_install;
 my $power_off;
 my $grub_menu;
+my $grub_file;
 my $grub_number;
+my $grub_reboot;
 my $target;
 my $make;
 my $pre_install;
@@ -232,6 +235,8 @@ my %option_map = (
     "ADD_CONFIG"                => \$addconfig,
     "REBOOT_TYPE"               => \$reboot_type,
     "GRUB_MENU"                 => \$grub_menu,
+    "GRUB_FILE"                 => \$grub_file,
+    "GRUB_REBOOT"               => \$grub_reboot,
     "PRE_INSTALL"               => \$pre_install,
     "POST_INSTALL"              => \$post_install,
     "NO_INSTALL"                => \$no_install,
@@ -368,7 +373,7 @@ EOF
     ;
 $config_help{"REBOOT_TYPE"} = << "EOF"
  Way to reboot the box to the test kernel.
- Only valid options so far are "grub" and "script".
+ Only valid options so far are "grub", "grub2", and "script".
 
  If you specify grub, it will assume grub version 1
  and will search in /boot/grub/menu.lst for the title \$GRUB_MENU
@@ -378,11 +383,14 @@ $config_help{"REBOOT_TYPE"} = << "EOF"
 
  The entry in /boot/grub/menu.lst must be entered in manually.
  The test will not modify that file.
+
+ If you specify grub2, then you also need to specify both \$GRUB_MENU
+ and \$GRUB_FILE.
 EOF
     ;
 $config_help{"GRUB_MENU"} = << "EOF"
  The grub title name for the test kernel to boot
- (Only mandatory if REBOOT_TYPE = grub)
+ (Only mandatory if REBOOT_TYPE = grub or grub2)
 
  Note, ktest.pl will not update the grub menu.lst, you need to
  manually add an option for the test. ktest.pl will search
@@ -393,6 +401,17 @@ $config_help{"GRUB_MENU"} = << "EOF"
  title Test Kernel
  kernel vmlinuz-test
  GRUB_MENU = Test Kernel
+
+ For grub2, a search of \$GRUB_FILE is performed for the lines
+ that begin with "menuentry". It will not detect submenus. The
+ menu must be a non-nested menu. Add the quotes used in the menu
+ to guarantee your selection, as the first menuentry with the content
+ of \$GRUB_MENU that is found will be used.
+EOF
+    ;
+$config_help{"GRUB_FILE"} = << "EOF"
+ If grub2 is used, the full path for the grub.cfg file is placed
+ here. Use something like /boot/grub2/grub.cfg to search.
 EOF
     ;
 $config_help{"REBOOT_SCRIPT"} = << "EOF"
@@ -521,6 +540,11 @@ sub get_ktest_configs {
     if ($rtype eq "grub") {
         get_ktest_config("GRUB_MENU");
     }
+
+    if ($rtype eq "grub2") {
+        get_ktest_config("GRUB_MENU");
+        get_ktest_config("GRUB_FILE");
+    }
 }
 
 sub process_variables {
@@ -1452,8 +1476,44 @@ sub run_scp_mod {
     return run_scp($src, $dst, $cp_scp);
 }
 
+sub get_grub2_index {
+
+    return if (defined($grub_number));
+
+    doprint "Find grub2 menu ... ";
+    $grub_number = -1;
+
+    my $ssh_grub = $ssh_exec;
+    $ssh_grub =~ s,\$SSH_COMMAND,cat $grub_file,g;
+
+    open(IN, "$ssh_grub |")
+        or die "unable to get $grub_file";
+
+    my $found = 0;
+
+    while (<IN>) {
+        if (/^menuentry.*$grub_menu/) {
+            $grub_number++;
+            $found = 1;
+            last;
+        } elsif (/^menuentry\s/) {
+            $grub_number++;
+        }
+    }
+    close(IN);
+
+    die "Could not find '$grub_menu' in $grub_file on $machine"
+        if (!$found);
+    doprint "$grub_number\n";
+}
+
 sub get_grub_index {
 
+    if ($reboot_type eq "grub2") {
+        get_grub2_index;
+        return;
+    }
+
     if ($reboot_type ne "grub") {
         return;
     }
@@ -1524,6 +1584,8 @@ sub reboot_to {
 
     if ($reboot_type eq "grub") {
         run_ssh "'(echo \"savedefault --default=$grub_number --once\" | grub --batch)'";
+    } elsif ($reboot_type eq "grub2") {
+        run_ssh "$grub_reboot $grub_number";
     } elsif (defined $reboot_script) {
         run_command "$reboot_script";
     }
@@ -3700,6 +3762,9 @@ for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
         $target = "$ssh_user\@$machine";
         if ($reboot_type eq "grub") {
             dodie "GRUB_MENU not defined" if (!defined($grub_menu));
+        } elsif ($reboot_type eq "grub2") {
+            dodie "GRUB_MENU not defined" if (!defined($grub_menu));
+            dodie "GRUB_FILE not defined" if (!defined($grub_file));
         }
     }
 
diff --git a/tools/testing/ktest/sample.conf b/tools/testing/ktest/sample.conf
index de28a0a3b8fc..57617ec88c3b 100644
--- a/tools/testing/ktest/sample.conf
+++ b/tools/testing/ktest/sample.conf
@@ -332,8 +332,18 @@
 # from other linux builds on the system.
 #LOCALVERSION = -test
 
+# For REBOOT_TYPE = grub2, you must specify where the grub.cfg
+# file is. This is the file that is searched to find the menu
+# option to boot to with GRUB_REBOOT
+#GRUB_FILE = /boot/grub2/grub.cfg
+
+# The tool for REBOOT_TYPE = grub2 to set the next reboot kernel
+# to boot into (one shot mode).
+# (default grub2_reboot)
+#GRUB_REBOOT = grub2_reboot
+
 # The grub title name for the test kernel to boot
-# (Only mandatory if REBOOT_TYPE = grub)
+# (Only mandatory if REBOOT_TYPE = grub or grub2)
 #
 # Note, ktest.pl will not update the grub menu.lst, you need to
 # manually add an option for the test. ktest.pl will search
@@ -343,6 +353,15 @@
 # For example, if in the /boot/grub/menu.lst the test kernel title has:
 # title Test Kernel
 # kernel vmlinuz-test
+#
+# For grub2, a search of top level "menuentry"s are done. No
+# submenu is searched. The menu is found by searching for the
+# contents of GRUB_MENU in the line that starts with "menuentry".
+# You may want to include the quotes around the option. For example:
+# for: menuentry 'Test Kernel'
+# do a: GRUB_MENU = 'Test Kernel'
+# For customizing, add your entry in /etc/grub.d/40_custom.
+#
 #GRUB_MENU = Test Kernel
 
 # A script to reboot the target into the test kernel
@@ -497,7 +516,7 @@
 #POST_BUILD_DIE = 1
 
 # Way to reboot the box to the test kernel.
-# Only valid options so far are "grub" and "script"
+# Only valid options so far are "grub", "grub2" and "script"
 # (default grub)
 # If you specify grub, it will assume grub version 1
 # and will search in /boot/grub/menu.lst for the title $GRUB_MENU
@@ -505,6 +524,9 @@
 # your setup, then specify "script" and have a command or script
 # specified in REBOOT_SCRIPT to boot to the target.
 #
+# For REBOOT_TYPE = grub2, you must define both GRUB_MENU and
+# GRUB_FILE.
+#
 # The entry in /boot/grub/menu.lst must be entered in manually.
 # The test will not modify that file.
 #REBOOT_TYPE = grub