lkml.org 
[lkml]   [2007]   [Oct]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 0/6][RFC] Cleanup FIBMAP
Chris Mason wrote:
> On Sat, 27 Oct 2007 18:57:06 +0100
> Anton Altaparmakov <aia21@cam.ac.uk> wrote:
>
>> Hi,
>>
>> ->bmap is ugly and horrible! If you have to do this at the very
>> least please cause ->bmap64 to be able to return error values in case
>> the file system failed to get the information or indeed such
>> information does not exist as is the case for compressed and
>> encrypted files for example and also for small files that are inside
>> the on-disk inode (NTFS resident files and reiserfs packed tails are
>> examples of this).
>>
>> And another of my pet peeves with ->bmap is that it uses 0 to mean
>> "sparse" which causes a conflict on NTFS at least as block zero is
>> part of the $Boot system file so it is a real, valid block... NTFS
>> uses -1 to denote sparse blocks internally.
>
> Reiserfs and Btrfs also use 0 to mean packed. It would be nice if there
> was a way to indicate your-data-is-here-but-isn't-alone. But that's
> more of a feature for the FIEMAP stuff.
>

I hadn't heard of FIEMAP, so I went back and read the thread from
April/May. It seems that this is a much better approach than
introducing a FIBMAP64.

What ever happened with this proposal?

Mike Waychison
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-29 20:19    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site