path: root/include/net/act_api.h
diff options
authorCong Wang <xiyou.wangcong@gmail.com>2017-11-01 10:23:50 -0700
committerDavid S. Miller <davem@davemloft.net>2017-11-03 10:30:38 +0900
commitceffcc5e254b450e6159f173e4538215cebf1b59 (patch)
treee774e0c77b5f8a2979794ed08cc93b6365852114 /include/net/act_api.h
parentnet_sched: acquire RTNL in tc_action_net_exit() (diff)
net_sched: hold netns refcnt for each action
TC actions have been destroyed asynchronously for a long time, previously in a RCU callback and now in a workqueue. If we don't hold a refcnt for its netns, we could use the per netns data structure, struct tcf_idrinfo, after it has been freed by netns workqueue. Hold refcnt to ensure netns destroy happens after all actions are gone. Fixes: ddf97ccdd7cb ("net_sched: add network namespace support for tc actions") Reported-by: Lucas Bates <lucasb@mojatatu.com> Tested-by: Lucas Bates <lucasb@mojatatu.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/act_api.h')
1 files changed, 3 insertions, 1 deletions
diff --git a/include/net/act_api.h b/include/net/act_api.h
index 5072446d5f06..c68551255032 100644
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -13,6 +13,7 @@
struct tcf_idrinfo {
spinlock_t lock;
struct idr action_idr;
+ struct net *net;
struct tc_action_ops;
@@ -104,7 +105,7 @@ struct tc_action_net {
static inline
int tc_action_net_init(struct tc_action_net *tn,
- const struct tc_action_ops *ops)
+ const struct tc_action_ops *ops, struct net *net)
int err = 0;
@@ -112,6 +113,7 @@ int tc_action_net_init(struct tc_action_net *tn,
if (!tn->idrinfo)
return -ENOMEM;
tn->ops = ops;
+ tn->idrinfo->net = net;
return err;