From 8f5f6178f366bdb93d6af6f2bdca8ebca1ad9fe9 Mon Sep 17 00:00:00 2001
From: Gerhard Heift <gerhard@heift.name>
Date: Thu, 30 Jan 2014 16:23:59 +0100
Subject: [PATCH] btrfs: tree_search, copy_to_sk: return EOVERFLOW for too
 small buffer

In copy_to_sk, if an item is too large for the given buffer, it now returns
-EOVERFLOW instead of copying a search_header with len = 0. For backward
compatibility for the first item it still copies such a header to the buffer,
but not any other following items, which could have fitted.

tree_search changes -EOVERFLOW back to 0 to behave similiar to the way it
behaved before this patch.

Signed-off-by: Gerhard Heift <Gerhard@Heift.Name>
Signed-off-by: Chris Mason <clm@fb.com>
Acked-by: David Sterba <dsterba@suse.cz>
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