Btrfs: remove empty block groups automatically

[cascardo/linux.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 51ff3f8..089f6da 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1298,8 +1298,8 @@ struct btrfs_block_group_cache {
         */
        struct list_head cluster_list;
 
-       /* For delayed block group creation */
-       struct list_head new_bg_list;
+       /* For delayed block group creation or deletion of empty block groups */
+       struct list_head bg_list;
 };
 
 /* delayed seq elem */
@@ -1568,6 +1568,7 @@ struct btrfs_fs_info {
        int do_barriers;
        int closing;
        int log_root_recovering;
+       int open;
 
        u64 total_pinned;
 
@@ -1717,6 +1718,9 @@ struct btrfs_fs_info {
 
        /* Used to reclaim the metadata space in the background. */
        struct work_struct async_reclaim_work;
+
+       spinlock_t unused_bgs_lock;
+       struct list_head unused_bgs;
 };
 
 struct btrfs_subvolume_writers {
@@ -3344,6 +3348,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
                           u64 size);
 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
                             struct btrfs_root *root, u64 group_start);
+void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
                                       struct btrfs_root *root);
 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);