btrfs: delayed-ref: Use btrfs_ref to refactor btrfs_add_delayed_tree_ref()

btrfs_add_delayed_tree_ref() has a longer and longer parameter list, and
some callers like btrfs_inc_extent_ref() are using @owner as level for
delayed tree ref.

Instead of making the parameter list longer, use btrfs_ref to refactor
it, so each parameter assignment should be self-explaining without dirty
level/owner trick, and provides the basis for later refactoring.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 17 insertions, 7 deletions

diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index 7d2a413df90d..a9c2f469caa9 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -735,8 +735,7 @@ static void init_delayed_ref_common(struct btrfs_fs_info *fs_info,
  * transaction commits.
  */
 int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
-			       u64 bytenr, u64 num_bytes, u64 parent,
-			       u64 ref_root,  int level, int action,
+			       struct btrfs_ref *generic_ref,
 			       struct btrfs_delayed_extent_op *extent_op,
 			       int *old_ref_mod, int *new_ref_mod)
 {
@@ -746,10 +745,18 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs;
 	struct btrfs_qgroup_extent_record *record = NULL;
 	int qrecord_inserted;
-	bool is_system = (ref_root == BTRFS_CHUNK_TREE_OBJECTID);
+	bool is_system;
+	int action = generic_ref->action;
+	int level = generic_ref->tree_ref.level;
 	int ret;
+	u64 bytenr = generic_ref->bytenr;
+	u64 num_bytes = generic_ref->len;
+	u64 parent = generic_ref->parent;
 	u8 ref_type;
 
+	is_system = (generic_ref->real_root == BTRFS_CHUNK_TREE_OBJECTID);
+
+	ASSERT(generic_ref->type == BTRFS_REF_METADATA && generic_ref->action);
 	BUG_ON(extent_op && extent_op->is_data);
 	ref = kmem_cache_alloc(btrfs_delayed_tree_ref_cachep, GFP_NOFS);
 	if (!ref)
@@ -762,7 +769,9 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
 	}
 
 	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
-	    is_fstree(ref_root)) {
+	    is_fstree(generic_ref->real_root) &&
+	    is_fstree(generic_ref->tree_ref.root) &&
+	    !generic_ref->skip_qgroup) {
 		record = kzalloc(sizeof(*record), GFP_NOFS);
 		if (!record) {
 			kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
@@ -777,13 +786,14 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
 		ref_type = BTRFS_TREE_BLOCK_REF_KEY;
 
 	init_delayed_ref_common(fs_info, &ref->node, bytenr, num_bytes,
-				ref_root, action, ref_type);
-	ref->root = ref_root;
+				generic_ref->tree_ref.root, action, ref_type);
+	ref->root = generic_ref->tree_ref.root;
 	ref->parent = parent;
 	ref->level = level;
 
 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes,
-			      ref_root, 0, action, false, is_system);
+			      generic_ref->tree_ref.root, 0, action, false,
+			      is_system);
 	head_ref->extent_op = extent_op;
 
 	delayed_refs = &trans->transaction->delayed_refs;