btrfs: uninline some static inline helpers from backref.h

There are many helpers doing simple things but not simple enough to
justify the static inline. None of them seems to be on a hot path so
move them to .c.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 1b57c8289de6..6514cb1d404a 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -2856,6 +2856,16 @@ struct btrfs_backref_iter *btrfs_backref_iter_alloc(struct btrfs_fs_info *fs_inf
 	return ret;
 }
 
+static void btrfs_backref_iter_release(struct btrfs_backref_iter *iter)
+{
+	iter->bytenr = 0;
+	iter->item_ptr = 0;
+	iter->cur_ptr = 0;
+	iter->end_ptr = 0;
+	btrfs_release_path(iter->path);
+	memset(&iter->cur_key, 0, sizeof(iter->cur_key));
+}
+
 int btrfs_backref_iter_start(struct btrfs_backref_iter *iter, u64 bytenr)
 {
 	struct btrfs_fs_info *fs_info = iter->fs_info;
@@ -2948,6 +2958,14 @@ release:
 	return ret;
 }
 
+static bool btrfs_backref_iter_is_inline_ref(struct btrfs_backref_iter *iter)
+{
+	if (iter->cur_key.type == BTRFS_EXTENT_ITEM_KEY ||
+	    iter->cur_key.type == BTRFS_METADATA_ITEM_KEY)
+		return true;
+	return false;
+}
+
 /*
  * Go to the next backref item of current bytenr, can be either inlined or
  * keyed.
@@ -3048,6 +3066,19 @@ struct btrfs_backref_node *btrfs_backref_alloc_node(
 	return node;
 }
 
+void btrfs_backref_free_node(struct btrfs_backref_cache *cache,
+			     struct btrfs_backref_node *node)
+{
+	if (node) {
+		ASSERT(list_empty(&node->list));
+		ASSERT(list_empty(&node->lower));
+		ASSERT(node->eb == NULL);
+		cache->nr_nodes--;
+		btrfs_put_root(node->root);
+		kfree(node);
+	}
+}
+
 struct btrfs_backref_edge *btrfs_backref_alloc_edge(
 		struct btrfs_backref_cache *cache)
 {
@@ -3059,6 +3090,52 @@ struct btrfs_backref_edge *btrfs_backref_alloc_edge(
 	return edge;
 }
 
+void btrfs_backref_free_edge(struct btrfs_backref_cache *cache,
+			     struct btrfs_backref_edge *edge)
+{
+	if (edge) {
+		cache->nr_edges--;
+		kfree(edge);
+	}
+}
+
+void btrfs_backref_unlock_node_buffer(struct btrfs_backref_node *node)
+{
+	if (node->locked) {
+		btrfs_tree_unlock(node->eb);
+		node->locked = 0;
+	}
+}
+
+void btrfs_backref_drop_node_buffer(struct btrfs_backref_node *node)
+{
+	if (node->eb) {
+		btrfs_backref_unlock_node_buffer(node);
+		free_extent_buffer(node->eb);
+		node->eb = NULL;
+	}
+}
+
+/*
+ * Drop the backref node from cache without cleaning up its children
+ * edges.
+ *
+ * This can only be called on node without parent edges.
+ * The children edges are still kept as is.
+ */
+void btrfs_backref_drop_node(struct btrfs_backref_cache *tree,
+			     struct btrfs_backref_node *node)
+{
+	ASSERT(list_empty(&node->upper));
+
+	btrfs_backref_drop_node_buffer(node);
+	list_del_init(&node->list);
+	list_del_init(&node->lower);
+	if (!RB_EMPTY_NODE(&node->rb_node))
+		rb_erase(&node->rb_node, &tree->rb_root);
+	btrfs_backref_free_node(tree, node);
+}
+
 /*
  * Drop the backref node from cache, also cleaning up all its
  * upper edges and any uncached nodes in the path.
@@ -3130,6 +3207,19 @@ void btrfs_backref_release_cache(struct btrfs_backref_cache *cache)
 	ASSERT(!cache->nr_edges);
 }
 
+void btrfs_backref_link_edge(struct btrfs_backref_edge *edge,
+			     struct btrfs_backref_node *lower,
+			     struct btrfs_backref_node *upper,
+			     int link_which)
+{
+	ASSERT(upper && lower && upper->level == lower->level + 1);
+	edge->node[LOWER] = lower;
+	edge->node[UPPER] = upper;
+	if (link_which & LINK_LOWER)
+		list_add_tail(&edge->list[LOWER], &lower->upper);
+	if (link_which & LINK_UPPER)
+		list_add_tail(&edge->list[UPPER], &upper->lower);
+}
 /*
  * Handle direct tree backref
  *