Usually if we find a bad block during the extent tree stuff we will error out,
but if the bad block is in an fs tree and doens't have extents in it then fsck
may still pass even though the block was complete garbage. So add the check
block logic to the fs root checking so we actually error out of
If check block fails during the extent tree checks we could evict the extent
buffer from cache, so the next time we go to read it for the fs_tree checks we
could miss the fact that its bogus and blow up in strange and interesting ways.
Fix this by running the leaf/node checks on all blocks in the f
