btrfs: rename do_chunk_alloc to btrfs_chunk_alloc

Really we just need the enum, but as we break more things up it'll help
to have this external to extent-tree.c.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -2780,6 +2780,28 @@ enum btrfs_flush_state {
 	COMMIT_TRANS		=	9,
 };
 
+/*
+ * control flags for do_chunk_alloc's force field
+ * CHUNK_ALLOC_NO_FORCE means to only allocate a chunk
+ * if we really need one.
+ *
+ * CHUNK_ALLOC_LIMITED means to only try and allocate one
+ * if we have very few chunks already allocated.  This is
+ * used as part of the clustering code to help make sure
+ * we have a good pool of storage to cluster in, without
+ * filling the FS with empty chunks
+ *
+ * CHUNK_ALLOC_FORCE means it must try to allocate one
+ *
+ */
+enum btrfs_chunk_alloc_enum {
+	CHUNK_ALLOC_NO_FORCE,
+	CHUNK_ALLOC_LIMITED,
+	CHUNK_ALLOC_FORCE,
+};
+
+int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
+		      enum btrfs_chunk_alloc_enum force);
 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
 int btrfs_check_data_free_space(struct inode *inode,
 			struct extent_changeset **reserved, u64 start, u64 len);

fs/btrfs/extent-tree.c

@@ -32,26 +32,6 @@
 
 #undef SCRAMBLE_DELAYED_REFS
 
-/*
- * control flags for do_chunk_alloc's force field
- * CHUNK_ALLOC_NO_FORCE means to only allocate a chunk
- * if we really need one.
- *
- * CHUNK_ALLOC_LIMITED means to only try and allocate one
- * if we have very few chunks already allocated.  This is
- * used as part of the clustering code to help make sure
- * we have a good pool of storage to cluster in, without
- * filling the FS with empty chunks
- *
- * CHUNK_ALLOC_FORCE means it must try to allocate one
- *
- */
-enum {
-	CHUNK_ALLOC_NO_FORCE,
-	CHUNK_ALLOC_LIMITED,
-	CHUNK_ALLOC_FORCE,
-};
-
 /*
  * Declare a helper function to detect underflow of various space info members
  */
@@ -88,8 +68,6 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
 static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
 				     struct btrfs_delayed_ref_node *node,
 				     struct btrfs_delayed_extent_op *extent_op);
-static int do_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
-			  int force);
 static int find_next_key(struct btrfs_path *path, int level,
 			 struct btrfs_key *key);
 static void dump_space_info(struct btrfs_fs_info *fs_info,
@@ -4143,8 +4121,8 @@ int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes)
 			if (IS_ERR(trans))
 				return PTR_ERR(trans);
 
-			ret = do_chunk_alloc(trans, alloc_target,
-					     CHUNK_ALLOC_NO_FORCE);
+			ret = btrfs_chunk_alloc(trans, alloc_target,
+						CHUNK_ALLOC_NO_FORCE);
 			btrfs_end_transaction(trans);
 			if (ret < 0) {
 				if (ret != -ENOSPC)
@@ -4414,8 +4392,8 @@ void check_system_chunk(struct btrfs_trans_handle *trans, u64 type)
  *    - return 1 if it successfully allocates a chunk,
  *    - return errors including -ENOSPC otherwise.
  */
-static int do_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
-			  int force)
+int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
+		      enum btrfs_chunk_alloc_enum force)
 {
 	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_space_info *space_info;
@@ -4877,10 +4855,10 @@ static void flush_space(struct btrfs_fs_info *fs_info,
 			ret = PTR_ERR(trans);
 			break;
 		}
-		ret = do_chunk_alloc(trans,
-				     btrfs_metadata_alloc_profile(fs_info),
-				     (state == ALLOC_CHUNK) ?
-				      CHUNK_ALLOC_NO_FORCE : CHUNK_ALLOC_FORCE);
+		ret = btrfs_chunk_alloc(trans,
+				btrfs_metadata_alloc_profile(fs_info),
+				(state == ALLOC_CHUNK) ? CHUNK_ALLOC_NO_FORCE :
+					CHUNK_ALLOC_FORCE);
 		btrfs_end_transaction(trans);
 		if (ret > 0 || ret == -ENOSPC)
 			ret = 0;
@@ -7672,8 +7650,8 @@ static int find_free_extent_update_loop(struct btrfs_fs_info *fs_info,
 				return ret;
 			}
 
-			ret = do_chunk_alloc(trans, ffe_ctl->flags,
-					     CHUNK_ALLOC_FORCE);
+			ret = btrfs_chunk_alloc(trans, ffe_ctl->flags,
+						CHUNK_ALLOC_FORCE);
 
 			/*
 			 * If we can't allocate a new chunk we've already looped
@@ -9687,8 +9665,7 @@ int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache)
 	 */
 	alloc_flags = update_block_group_flags(fs_info, cache->flags);
 	if (alloc_flags != cache->flags) {
-		ret = do_chunk_alloc(trans, alloc_flags,
-				     CHUNK_ALLOC_FORCE);
+		ret = btrfs_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
 		/*
 		 * ENOSPC is allowed here, we may have enough space
 		 * already allocated at the new raid level to
@@ -9704,7 +9681,7 @@ int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache)
 	if (!ret)
 		goto out;
 	alloc_flags = get_alloc_profile(fs_info, cache->space_info->flags);
-	ret = do_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
+	ret = btrfs_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
 	if (ret < 0)
 		goto out;
 	ret = inc_block_group_ro(cache, 0);
@@ -9725,7 +9702,7 @@ int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type)
 {
 	u64 alloc_flags = get_alloc_profile(trans->fs_info, type);
 
-	return do_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
+	return btrfs_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
 }
 
 /*