1 files changed, 38 insertions, 0 deletions
diff --git a/net/unix/garbage.c b/net/unix/garbage.c
index 0104be9d4704..8ea7640e032e 100644
--- a/net/unix/garbage.c
+++ b/net/unix/garbage.c
@@ -101,6 +101,44 @@ struct unix_sock *unix_get_socket(struct file *filp)
 	return NULL;
 }
 
+static void unix_free_vertices(struct scm_fp_list *fpl)
+{
+	struct unix_vertex *vertex, *next_vertex;
+
+	list_for_each_entry_safe(vertex, next_vertex, &fpl->vertices, entry) {
+		list_del(&vertex->entry);
+		kfree(vertex);
+	}
+}
+
+int unix_prepare_fpl(struct scm_fp_list *fpl)
+{
+	struct unix_vertex *vertex;
+	int i;
+
+	if (!fpl->count_unix)
+		return 0;
+
+	for (i = 0; i < fpl->count_unix; i++) {
+		vertex = kmalloc(sizeof(*vertex), GFP_KERNEL);
+		if (!vertex)
+			goto err;
+
+		list_add(&vertex->entry, &fpl->vertices);
+	}
+
+	return 0;
+
+err:
+	unix_free_vertices(fpl);
+	return -ENOMEM;
+}
+
+void unix_destroy_fpl(struct scm_fp_list *fpl)
+{
+	unix_free_vertices(fpl);
+}
+
 DEFINE_SPINLOCK(unix_gc_lock);
 unsigned int unix_tot_inflight;
 static LIST_HEAD(gc_candidates);