Btrfs: Add block group pinned accounting back

This patch adds a helper function 'update_pinned_extents' to
extent-tree.c. The usage of the helper function is similar to
'update_block_group',  the last parameter of the function indicates
pin vs unpin.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 27cadae1af63..56b977ffe918 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -292,8 +292,8 @@ struct btrfs_block_group_cache {
         struct btrfs_block_group_item item;
         int data;
         int cached;
+        u64 pinned;
 };
-
 struct btrfs_fs_info {
         u8 fsid[BTRFS_FSID_SIZE];
         struct btrfs_root *extent_root;
@@ -324,8 +324,9 @@ struct btrfs_fs_info {
         struct completion kobj_unregister;
         int do_barriers;
         int closing;
-};
 
+        u64 total_pinned;
+};
 /*
  * in ram representation of the tree.  extent_root is used for all allocations
  * and for the extent tree extent_root root.