Re: [PATCH] allow ext3->ext4 upgrades

[Eric Sandeen <sandeen redhat com>]

Eric Sandeen wrote:
> I have not been able to test this because each time I try, I get
> "Multiple devices on your system are labelled /." [Exit Installer]
> even though really, truly, and honestly only one device is labeled
> "/"
> 
> If this looks reasonably safe, maybe it can get tossed into the mix
> and I'll try the upgrade another day....
> 
> All it does is mark it with the "test_fs" flag (which won't be needed
> when ext4 goes "live") and then as long as the ext3 fs is mounted as
> ext4 during install, every file which is created/updated/installed
> will be in the new extents format.
> 

Ok got past the (silly... sorry) testing problem, and found that this
does need more work.

iw/upgrade_migratefs_gui.py looks very ext2->ext3 -centric; help text is
all about ext3, and:

                entry.setFileSystemType(fileSystemTypeGet("ext3"))
                entry.setFormat(0)
                entry.setMigrate(1)

would appear to be assuming that we are only ever migrating to "ext3?"

The migrate method I set for ext3->ext4 was called, because I did see
that the "test_fs" flag got set.

-Eric