Re: [PATCH 1/4] vfs: vfs-level fiemap interface

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On Tue, Oct 07, 2008 at 02:24:36PM +0100, Jamie Lokier wrote:
> Ok, without getting in the way any more :-) it would be good to
> clarify in the description whether !(flags & FIEMAP_EXTENT_ENCODED)
> means only reading is allowed, or if it means writing over the data
> blocks is safe too.
> 
> Just so that filesystems will know whether to set the flag for blocks
> which can be read but not written.  This may include tail-merged
> blocks.

I think writing to a filesystem without fs assistance is always a bad
idea.  And yes, we should add this to the description.

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