UBIFS: introduce LEB overhead

This is a preparational patch for the following statfs()
report fix.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 681d46e16286..57e58541de28 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -995,6 +995,9 @@ struct ubifs_mount_opts {
  * @max_idx_node_sz: maximum indexing node aligned on 8-bytes boundary
  * @max_inode_sz: maximum possible inode size in bytes
  * @max_znode_sz: size of znode in bytes
+ *
+ * @leb_overhead: how many bytes are wasted in an LEB when it is filled with
+ *                data nodes of maximum size - used in free space reporting
  * @dead_wm: LEB dead space watermark
  * @dark_wm: LEB dark space watermark
  * @block_cnt: count of 4KiB blocks on the FS
@@ -1226,6 +1229,8 @@ struct ubifs_info {
         int max_idx_node_sz;
         long long max_inode_sz;
         int max_znode_sz;
+
+        int leb_overhead;
         int dead_wm;
         int dark_wm;
         int block_cnt;