tree a2e697a397615dad07bb8665f5d8ec86cd481062
parent 12544442882e13aee98126928bb3a1a141484fe8
author Gerhard Heift <gerhard@heift.name> 1391095439 +0100
committer Chris Mason <clm@fb.com> 1402622499 -0700

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>