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Btrfs: return -1 when lzo compression makes data bigger

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With this fix the lzo code behaves like the zlib code by returning an
error
code when compression does not help reduce the size of the file.
This is currently not a bug since the compressed size is checked again
in
the calling method compress_file_range.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Stefan Agner 2013-07-01 20:33:39 +02:00 committed by Chris Mason
parent c8cc634165
commit 59516f6017
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/lzo.c
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@ -207,8 +207,10 @@ static int lzo_compress_pages(struct list_head *ws,
}
/* we're making it bigger, give up */
if (tot_in > 8192 && tot_in < tot_out)
if (tot_in > 8192 && tot_in < tot_out) {
ret = -1;
goto out;
}
/* we're all done */
if (tot_in >= len)