btrfs: migrate the block group read/creation code

All of the prep work has been done so we can now cleanly move this chunk
over.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ refresh, add btrfs_get_alloc_profile export, comment updates ]
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/block-group.h

@@ -183,6 +183,10 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
 			     u64 group_start, struct extent_map *em);
 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg);
+int btrfs_read_block_groups(struct btrfs_fs_info *info);
+int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used,
+			   u64 type, u64 chunk_offset, u64 size);
+void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
 
 static inline int btrfs_block_group_cache_done(
 		struct btrfs_block_group_cache *cache)

fs/btrfs/ctree.h

@@ -2528,16 +2528,12 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
 int btrfs_free_block_groups(struct btrfs_fs_info *info);
-int btrfs_read_block_groups(struct btrfs_fs_info *info);
-int btrfs_make_block_group(struct btrfs_trans_handle *trans,
-			   u64 bytes_used, u64 type, u64 chunk_offset,
-			   u64 size);
 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
-void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info);
 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info);
 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info);
+u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
 
 enum btrfs_reserve_flush_enum {