Re: [PATCH 3/6] btrfs-progs: Pull free space tree related code from kernel

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On Fri, Jun 15, 2018 at 02:05:59PM +0300, Nikolay Borisov wrote:
> To help implement free space tree checker in user space some kernel
> function are necessary, namely iterating/deleting/adding freespace
> items, some internal search functions. Functions to populate a block
> group based on the extent tree. The code is largely copy/paste from
> the kernel with locking eliminated (i.e free_space_lock). It supports
> reading/writing of both bitmap and extent based FST trees.
> 
> Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>

Why doesn't this include the bitmap <-> extent conversions? If we end up
rebuilding the free space tree, we're never going to use the bitmap
format, which sucks if the free space is fragmented.



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