1 files changed, 10 insertions, 0 deletions

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 82ee56bba299..c71abec0ab90 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -128,6 +128,16 @@ struct btrfs_inode {
         u64 last_unlink_trans;
 
         /*
+         * Counters to keep track of the number of extent item's we may use due
+         * to delalloc and such.  outstanding_extents is the number of extent
+         * items we think we'll end up using, and reserved_extents is the number
+         * of extent items we've reserved metadata for.
+         */
+        spinlock_t accounting_lock;
+        int reserved_extents;
+        int outstanding_extents;
+
+        /*
          * ordered_data_close is set by truncate when a file that used
          * to have good data has been truncated to zero.  When it is set
          * the btrfs file release call will add this inode to the