net_sched: prepare tcf_hashinfo_destroy() for netns support

[cascardo/linux.git] / net / sched / act_api.c

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 06e7c4a..acafaf7 100644 (file)
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -69,7 +69,7 @@ int __tcf_hash_release(struct tc_action *a, bool bind, bool strict)
                        if (a->ops->cleanup)
                                a->ops->cleanup(a, bind);
                        tcf_hash_destroy(a);
-                       ret = 1;
+                       ret = ACT_P_DELETED;
                }
        }
 
@@ -302,6 +302,32 @@ void tcf_hash_insert(struct tc_action *a)
 }
 EXPORT_SYMBOL(tcf_hash_insert);
 
+static void tcf_hashinfo_destroy(const struct tc_action_ops *ops)
+{
+       struct tcf_hashinfo *hinfo = ops->hinfo;
+       struct tc_action a = {
+               .ops = ops,
+       };
+       int i;
+
+       for (i = 0; i < hinfo->hmask + 1; i++) {
+               struct tcf_common *p;
+               struct hlist_node *n;
+
+               hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfc_head) {
+                       int ret;
+
+                       a.priv = p;
+                       ret = __tcf_hash_release(&a, false, true);
+                       if (ret == ACT_P_DELETED)
+                               module_put(ops->owner);
+                       else if (ret < 0)
+                               return;
+               }
+       }
+       kfree(hinfo->htab);
+}
+
 static LIST_HEAD(act_base);
 static DEFINE_RWLOCK(act_mod_lock);
 
@@ -333,7 +359,7 @@ int tcf_register_action(struct tc_action_ops *act, unsigned int mask)
        list_for_each_entry(a, &act_base, head) {
                if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
                        write_unlock(&act_mod_lock);
-                       tcf_hashinfo_destroy(act->hinfo);
+                       tcf_hashinfo_destroy(act);
                        kfree(act->hinfo);
                        return -EEXIST;
                }
@@ -353,7 +379,7 @@ int tcf_unregister_action(struct tc_action_ops *act)
        list_for_each_entry(a, &act_base, head) {
                if (a == act) {
                        list_del(&act->head);
-                       tcf_hashinfo_destroy(act->hinfo);
+                       tcf_hashinfo_destroy(act);
                        kfree(act->hinfo);
                        err = 0;
                        break;