Re: [PATCH] Revert "Btrfs: allow superblock mismatch from older mkfs"

[Liu Bo <bo.li.liu@oracle.com>]

On Thu, Mar 12, 2015 at 06:25:13PM +0100, David Sterba wrote:
> On Thu, Mar 12, 2015 at 01:40:47PM +0800, Liu Bo wrote:
> > This reverts commit 667e7d94a1683661cff5fe9a0fa0d7f8fdd2c007.
> > 
> > This was used to make sure that a fresh btrfs from an older mkfs.btrfs,
> > and it also allows us to mount a buggy btrfs if this btrfs has the right
> > superblock head part but has something wrong with chunk tree part[1], and
> > after that we can hit BUG_ON()s set in the code to prevent something
> > impossible.
> > 
> > Since David has gave us "Btrfs progs v3.19-rc2", just remove the check,
> > if anyone who wants to make a fresh btrfs, please use the latest one.
> 
> I think the fixed progs are out long enough and the combination of
> really old progs + really new kernel is very uncommon and we don't need
> to care about that anymore.
> 
> However, please do not do it as a revert, it's a normal patch although
> it effectively reverts some other patch.

Okay, I'll update this ASAP, thanks for your review.

Thanks,

-liubo