Btrfs: return EIO if we have extent tree corruption

The callers of lookup_inline_extent_info all handle getting an error back
properly, so return an error if we have corruption instead of being a jerk and
panicing.  Still WARN_ON() since this is kind of crucial and I've been seeing it
a bit too much recently for my taste, I think we're doing something wrong
somewhere.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index aaee2b7fee78..350b9b18140c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -1467,8 +1467,11 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans,
         if (ret && !insert) {
                 err = -ENOENT;
                 goto out;
+        } else if (ret) {
+                err = -EIO;
+                WARN_ON(1);
+                goto out;
         }
-        BUG_ON(ret); /* Corruption */
 
         leaf = path->nodes[0];
         item_size = btrfs_item_size_nr(leaf, path->slots[0]);