ktest: Add native support for syslinux boot loader

I installed Fedora 17 which no longer supports grub v1. I worked
with grub2 for a while, but there's so many issues with it and automated
rebooting, that I decided to switch to syslinux. Instead of using
the REBOOT_SCRIPT and add customized changes to get syslinux booted,
I thought it better to make ktest aware of syslinux and add options
to simplify the use of syslinux on a target test box.

Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: John 'Warthog9' Hawley <warthog9@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

tools/testing/ktest/ktest.pl

@@ -54,6 +54,8 @@ my %default = (
     "STOP_TEST_AFTER"		=> 600,
     "MAX_MONITOR_WAIT"		=> 1800,
     "GRUB_REBOOT"		=> "grub2-reboot",
+    "SYSLINUX"			=> "extlinux",
+    "SYSLINUX_PATH"		=> "/boot/extlinux",
 
 # required, and we will ask users if they don't have them but we keep the default
 # value something that is common.
@@ -109,6 +111,9 @@ my $grub_menu;
 my $grub_file;
 my $grub_number;
 my $grub_reboot;
+my $syslinux;
+my $syslinux_path;
+my $syslinux_label;
 my $target;
 my $make;
 my $pre_install;
@@ -237,6 +242,9 @@ my %option_map = (
     "GRUB_MENU"			=> \$grub_menu,
     "GRUB_FILE"			=> \$grub_file,
     "GRUB_REBOOT"		=> \$grub_reboot,
+    "SYSLINUX"			=> \$syslinux,
+    "SYSLINUX_PATH"		=> \$syslinux_path,
+    "SYSLINUX_LABEL"		=> \$syslinux_label,
     "PRE_INSTALL"		=> \$pre_install,
     "POST_INSTALL"		=> \$post_install,
     "NO_INSTALL"		=> \$no_install,
@@ -373,7 +381,7 @@ EOF
     ;
 $config_help{"REBOOT_TYPE"} = << "EOF"
  Way to reboot the box to the test kernel.
- Only valid options so far are "grub", "grub2", and "script".
+ Only valid options so far are "grub", "grub2", "syslinux", 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
@@ -386,6 +394,11 @@ $config_help{"REBOOT_TYPE"} = << "EOF"
 
  If you specify grub2, then you also need to specify both \$GRUB_MENU
  and \$GRUB_FILE.
+
+ If you specify syslinux, then you may use SYSLINUX to define the syslinux
+ command (defaults to extlinux), and SYSLINUX_PATH to specify the path to
+ the syslinux install (defaults to /boot/extlinux). But you have to specify
+ SYSLINUX_LABEL to define the label to boot to for the test kernel.
 EOF
     ;
 $config_help{"GRUB_MENU"} = << "EOF"
@@ -414,6 +427,11 @@ $config_help{"GRUB_FILE"} = << "EOF"
  here. Use something like /boot/grub2/grub.cfg to search.
 EOF
     ;
+$config_help{"SYSLINUX_LABEL"} = << "EOF"
+ If syslinux is used, the label that boots the target kernel must
+ be specified with SYSLINUX_LABEL.
+EOF
+    ;
 $config_help{"REBOOT_SCRIPT"} = << "EOF"
  A script to reboot the target into the test kernel
  (Only mandatory if REBOOT_TYPE = script)
@@ -545,6 +563,10 @@ sub get_ktest_configs {
 	get_ktest_config("GRUB_MENU");
 	get_ktest_config("GRUB_FILE");
     }
+
+    if ($rtype eq "syslinux") {
+	get_ktest_config("SYSLINUX_LABEL");
+    }
 }
 
 sub process_variables {
@@ -1589,6 +1611,8 @@ sub reboot_to {
 	run_ssh "'(echo \"savedefault --default=$grub_number --once\" | grub --batch)'";
     } elsif ($reboot_type eq "grub2") {
 	run_ssh "$grub_reboot $grub_number";
+    } elsif ($reboot_type eq "syslinux") {
+	run_ssh "$syslinux --once \\\"$syslinux_label\\\" $syslinux_path";
     } elsif (defined $reboot_script) {
 	run_command "$reboot_script";
     }
@@ -3768,6 +3792,8 @@ for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
 	} elsif ($reboot_type eq "grub2") {
 	    dodie "GRUB_MENU not defined" if (!defined($grub_menu));
 	    dodie "GRUB_FILE not defined" if (!defined($grub_file));
+	} elsif ($reboot_type eq "syslinux") {
+	    dodie "SYSLINUX_LABEL not defined" if (!defined($syslinux_label));
 	}
     }
 

tools/testing/ktest/sample.conf

@@ -364,6 +364,22 @@
 #
 #GRUB_MENU = Test Kernel
 
+# For REBOOT_TYPE = syslinux, the name of the syslinux executable
+# (on the target) to use to set up the next reboot to boot the
+# test kernel.
+# (default extlinux)
+#SYSLINUX = syslinux
+
+# For REBOOT_TYPE = syslinux, the path that is passed to to the
+# syslinux command where syslinux is installed.
+# (default /boot/extlinux)
+#SYSLINUX_PATH = /boot/syslinux
+
+# For REBOOT_TYPE = syslinux, the syslinux label that references the
+# test kernel in the syslinux config file.
+# (default undefined)
+#SYSLINUX_LABEL = "test-kernel"
+
 # A script to reboot the target into the test kernel
 # This and SWITCH_TO_TEST are about the same, except
 # SWITCH_TO_TEST is run even for REBOOT_TYPE = grub.
@@ -516,7 +532,7 @@
 #POST_BUILD_DIE = 1
 
 # Way to reboot the box to the test kernel.
-# Only valid options so far are "grub", "grub2" and "script"
+# Only valid options so far are "grub", "grub2", "syslinux" 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
@@ -527,6 +543,10 @@
 # For REBOOT_TYPE = grub2, you must define both GRUB_MENU and
 # GRUB_FILE.
 #
+# For REBOOT_TYPE = syslinux, you must define SYSLINUX_LABEL, and
+# perhaps modify SYSLINUX (default extlinux) and SYSLINUX_PATH
+# (default /boot/extlinux)
+#
 # The entry in /boot/grub/menu.lst must be entered in manually.
 # The test will not modify that file.
 #REBOOT_TYPE = grub