path: root/include/net/sch_generic.h
diff options
authorVlad Buslov <vladbu@mellanox.com>2019-02-11 10:55:42 +0200
committerDavid S. Miller <davem@davemloft.net>2019-02-12 13:41:33 -0500
commit726d061286ceeeabda54ba6f080d0cb8f187a9d7 (patch)
tree1bbd36ec6d6bf3e1a53c1de07c9c9ed4560eabd1 /include/net/sch_generic.h
parentnet: sched: refactor tp insert/delete for concurrent execution (diff)
net: sched: prevent insertion of new classifiers during chain flush
Extend tcf_chain with 'flushing' flag. Use the flag to prevent insertion of new classifier instances when chain flushing is in progress in order to prevent resource leak when tcf_proto is created by unlocked users concurrently. Return EAGAIN error from tcf_chain_tp_insert_unique() to restart tc_new_tfilter() and lookup the chain/proto again. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sch_generic.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 083e566fc380..e8cf36ed3e87 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -356,6 +356,7 @@ struct tcf_chain {
unsigned int refcnt;
unsigned int action_refcnt;
bool explicitly_created;
+ bool flushing;
const struct tcf_proto_ops *tmplt_ops;
void *tmplt_priv;