Re: Upgrade script for libata transition

[Martin Michlmayr <tbm@cyrius.com>]

* Ben Hutchings <ben@decadent.org.uk> [2009-12-29 12:06]:
> Linux kernel packages for "squeeze" will use libata-based drivers in
> preference to old-style IDE drivers.  On some systems this will change

Some comments:

 - Machines needing the DELO boot loader are no longer supported but
   I guess it doesn't hurt to have it there.
   (BTW, is there a reason we list all these boot loaders in
   temp.image.plain/postinst?)

 - Support for CoLo is needed (Cobalt machines).  A patch is below.
   It generates a good boot config.  Hmm, actually, there is a
   problem: it won't boot.  mips/mipsel don't use a ramdisk and the
   kernel doesn't like root=UUID=...  I guess the solution is to
   convert hdaX to sdaX.  Comments?   (The same problem applies to
   delo/arcboot but there we could simply skip the UUID conversion
   since the machines use SCSI anyway and so have always used sdaX)

 - I wonder if you should run "update-initramfs -u" on machines
   where flash-kernel is installed and `flash-kernel --supported` is true
   (the root device is stored in the ramdisk).

 - grub1_update on line 308 has:
     if (defined(my $new_value = kernel_update($value))) {
   Don't you have to pass $map to kernel_update() as the 2nd paramter?

--- upgrade	2010-01-11 19:22:06.000000000 +0000
+++ colo2	2010-01-11 20:26:51.000000000 +0000
@@ -819,6 +819,36 @@
     }
 }
 
+### colo
+
+sub colo_list {
+    my ($file) = @_;
+    while (<$file>) {
+	# If CoLo is not configured to use the generic symlink, ignore it.
+	if (/^load.*vmlinux-/) {
+		return ();
+	}
+	if (/^execute root=(\S+)/) {
+	 	return $1;
+	}
+    }
+    return ();
+}
+
+sub colo_update {
+    my ($old, $new, $map) = @_;
+    while (<$old>) {
+	my $text = $_;
+	if (/^mount hda/) {
+		$text = "# CoLo uses hda rather than sda to refer to the disk\n$text";
+	}
+	if (/^execute root=(\S+)(.*)/) {
+		$text = "# $text" . "execute root=" . $map->{$1} . "$2\n";
+	}
+	$new->print($text);
+    }
+}
+
 ### Filesystem relabelling
 
 sub ext2_label {
@@ -974,7 +1004,11 @@
 		    {packages => 'aboot',
 		     path => '/etc/aboot.conf',
 		     list => \&aboot_list,
-		     update => \&aboot_update});
+		     update => \&aboot_update},
+		    {packages => 'colo',
+		     path => '/boot/default.colo',
+		     list => \&colo_list,
+		     update => \&colo_update});
 
 my %bdev_map = ();
 my @matched_configs = ();

-- 
Martin Michlmayr
http://www.cyrius.com/