Btrfs: update space balancing code

[linux-2.6-omap-h63xx.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 3e62a1b0a1f715290c3c4f5c7ca322d6585cd309..2775e270881e485becc29503307f055814c4033b 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -604,6 +604,7 @@ struct btrfs_fs_info {
        struct mutex chunk_mutex;
        struct mutex drop_mutex;
        struct mutex volume_mutex;
+       struct mutex tree_reloc_mutex;
        struct list_head trans_list;
        struct list_head hashers;
        struct list_head dead_roots;
@@ -647,6 +648,10 @@ struct btrfs_fs_info {
        struct task_struct *cleaner_kthread;
        int thread_pool_size;
 
+       /* tree relocation relocated fields */
+       struct extent_io_tree reloc_mapping_tree;
+       struct list_head dead_reloc_roots;
+       struct btrfs_leaf_ref_tree reloc_ref_tree;
        struct btrfs_leaf_ref_tree shared_ref_tree;
 
        struct kobject super_kobj;
@@ -698,6 +703,7 @@ struct btrfs_root {
        struct btrfs_leaf_ref_tree ref_tree_struct;
        struct btrfs_dirty_root *dirty_root;
        struct btrfs_root *log_root;
+       struct btrfs_root *reloc_root;
 
        struct btrfs_root_item root_item;
        struct btrfs_key root_key;
@@ -1517,7 +1523,6 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
                                            struct btrfs_root *root,
                                            u64 bytenr, u32 blocksize);
-int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
                                 struct btrfs_root *root,
                                 struct btrfs_path *path,
@@ -1582,10 +1587,29 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
                           struct btrfs_root *root, u64 bytes_used,
                           u64 type, u64 chunk_objectid, u64 chunk_offset,
                           u64 size);
+int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
+                            struct btrfs_root *root, u64 group_start);
+int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
+int btrfs_free_reloc_root(struct btrfs_root *root);
+int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
+int btrfs_add_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
+                           u64 num_bytes, u64 new_bytenr);
+int btrfs_get_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
+                           u64 num_bytes, u64 *new_bytenr);
+void btrfs_free_reloc_mappings(struct btrfs_root *root);
+int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
+                              struct btrfs_root *root,
+                              struct extent_buffer *buf, u64 orig_start);
+int btrfs_add_dead_reloc_root(struct btrfs_root *root);
+int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
 /* ctree.c */
 int btrfs_previous_item(struct btrfs_root *root,
                        struct btrfs_path *path, u64 min_objectid,
                        int type);
+int btrfs_merge_path(struct btrfs_trans_handle *trans,
+                    struct btrfs_root *root,
+                    struct btrfs_key *node_keys,
+                    u64 *nodes, int lowest_level);
 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
                            struct btrfs_root *root, struct btrfs_path *path,
                            struct btrfs_key *new_key);