3 files changed, 58 insertions, 0 deletions
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index ef48aca056b..21fe3841be9 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -4214,6 +4214,54 @@ _unmask_cancellation (void)
         (void) pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
 }
 
+/* This is a wrapper function to add a pointer to a list,
+ * which doesn't contain list member
+ */
+struct list_node*
+_list_node_add (void *ptr, struct list_head *list,
+               int (*compare)(struct list_head *, struct list_head *))
+{
+        struct list_node  *node = NULL;
+
+        if (ptr == NULL || list == NULL)
+                goto out;
+
+        node = GF_CALLOC (1, sizeof (struct list_node), gf_common_list_node);
+
+        if (node == NULL)
+                goto out;
+
+        node->ptr = ptr;
+        if (compare)
+                list_add_order (&node->list, list, compare);
+        else
+                list_add_tail (&node->list, list);
+out:
+        return node;
+}
+
+struct list_node*
+list_node_add (void *ptr, struct list_head *list)
+{
+        return _list_node_add (ptr, list, NULL);
+}
+
+struct list_node*
+list_node_add_order (void *ptr, struct list_head *list,
+                     int (*compare)(struct list_head *, struct list_head *))
+{
+        return _list_node_add (ptr, list, compare);
+}
+
+void
+list_node_del (struct list_node *node)
+{
+        if (node == NULL)
+                return;
+
+        list_del_init (&node->list);
+        GF_FREE (node);
+}
 
 const char *
 fop_enum_to_pri_string (glusterfs_fop_t fop)
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index acd5cb5303e..58889ca9a5c 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -188,7 +188,16 @@ struct dnscache6 {
         struct addrinfo *next;
 };
 
+struct list_node {
+        void *ptr;
+        struct list_head list;
+};
 
+struct list_node *list_node_add (void *ptr, struct list_head *list);
+struct list_node *list_node_add_order (void *ptr, struct list_head *list,
+                                       int (*compare)(struct list_head *,
+                                            struct list_head *));
+void list_node_del (struct list_node *node);
 
 struct dnscache *gf_dnscache_init (time_t ttl);
 struct dnscache_entry *gf_dnscache_entry_init ();
diff --git a/libglusterfs/src/mem-types.h b/libglusterfs/src/mem-types.h
index 63fffeeafab..639ba3721f1 100644
--- a/libglusterfs/src/mem-types.h
+++ b/libglusterfs/src/mem-types.h
@@ -158,6 +158,7 @@ enum gf_common_mem_types_ {
         gf_common_mt_syncstack,
         gf_common_mt_syncenv,
         gf_common_mt_scan_data,
+        gf_common_list_node,
         gf_common_mt_end
 };
 #endif