[PATCH 0/2 V3] xfs_repair: rework inode clearing and free inode validation

[Eric Sandeen <sandeen@redhat.com>]

Warn the user if any free inodes contain errors, and set exit code
in the process.  Do this by running the existing dinode verifier and
clearing / warning if it fails.

2nd patch separates out the inode validation from the clearing function

There is a functional change here which I'm on the fence about; free
inodes are now only cleared if they won't pass the dinode verifier,
which is the only thing the kernel would squawk about.  But that's
a subset of the clear_inode checks.

The old clear_dinode function checked a lot of things that the
verifier simply doesn't care about, but I think it's ok for
those tests to go away; if the kernel does care about, say, extent
count on a free inode, the verifier should test it.