diff options
Diffstat (limited to 'net/sched/act_api.c')
| -rw-r--r-- | net/sched/act_api.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c index 6f118d62c731..fac8c769454f 100644 --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -246,6 +246,20 @@ nla_put_failure: goto done; } +static int tcf_idr_release_unsafe(struct tc_action *p) +{ + if (atomic_read(&p->tcfa_bindcnt) > 0) + return -EPERM; + + if (refcount_dec_and_test(&p->tcfa_refcnt)) { + idr_remove(&p->idrinfo->action_idr, p->tcfa_index); + tcf_action_cleanup(p); + return ACT_P_DELETED; + } + + return 0; +} + static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb, const struct tc_action_ops *ops) { @@ -262,15 +276,19 @@ static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb, if (nla_put_string(skb, TCA_KIND, ops->kind)) goto nla_put_failure; + spin_lock(&idrinfo->lock); idr_for_each_entry_ul(idr, p, id) { - ret = __tcf_idr_release(p, false, true); + ret = tcf_idr_release_unsafe(p); if (ret == ACT_P_DELETED) { module_put(ops->owner); n_i++; } else if (ret < 0) { + spin_unlock(&idrinfo->lock); goto nla_put_failure; } } + spin_unlock(&idrinfo->lock); + if (nla_put_u32(skb, TCA_FCNT, n_i)) goto nla_put_failure; nla_nest_end(skb, nest); |