btrfs: pass the ino via truncate control

In the future we are going to want to truncate inode items without
needing to have an btrfs_inode to pass in, so add ino to the
btrfs_truncate_control and use that to look up the inode items to
truncate.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 3a6bf36..c2a3417 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -293,6 +293,7 @@ int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_truncate_control control = {
 		.new_size = 0,
+		.ino = btrfs_ino(BTRFS_I(vfs_inode)),
 		.min_type = BTRFS_EXTENT_DATA_KEY,
 		.clear_extent_range = true,
 	};