@@ -1118,7 +1118,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
/* Create subtree root node */
sfn = node_alloc();
if (!sfn)
- goto st_failure;
+ goto failure;
sfn->leaf = info->nl_net->ipv6.ip6_null_entry;
atomic_inc(&info->nl_net->ipv6.ip6_null_entry->rt6i_ref);
@@ -1135,12 +1135,12 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
if (IS_ERR(sn)) {
/* If it is failed, discard just allocated
- root, and then (in st_failure) stale node
+ root, and then (in failure) stale node
in main tree.
*/
node_free(sfn);
err = PTR_ERR(sn);
- goto st_failure;
+ goto failure;
}
/* Now link new subtree to main tree */
@@ -1155,7 +1155,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
if (IS_ERR(sn)) {
err = PTR_ERR(sn);
- goto st_failure;
+ goto failure;
}
}
@@ -1196,18 +1196,17 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
atomic_inc(&pn->leaf->rt6i_ref);
}
#endif
- /* Always release dst as dst->__refcnt is guaranteed
- * to be taken before entering this function
- */
- dst_release_immediate(&rt->dst);
+ goto failure;
}
return err;
-#ifdef CONFIG_IPV6_SUBTREES
- /* Subtree creation failed, probably main tree node
- is orphan. If it is, shoot it.
+failure:
+ /* fn->leaf could be NULL if fn is an intermediate node and we
+ * failed to add the new route to it in both subtree creation
+ * failure and fib6_add_rt2node() failure case.
+ * In both cases, fib6_repair_tree() should be called to fix
+ * fn->leaf.
*/
-st_failure:
if (fn && !(fn->fn_flags & (RTN_RTINFO|RTN_ROOT)))
fib6_repair_tree(info->nl_net, fn);
/* Always release dst as dst->__refcnt is guaranteed
@@ -1215,7 +1214,6 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
*/
dst_release_immediate(&rt->dst);
return err;
-#endif
}
/*