[Patch net] net_sched: notify filter deletion when deleting a chain

[Cong Wang]

When we delete a chain of filters, we need to notify
user-space we are deleting each filters in this chain
too.

Fixes: 32a4f5ecd738 ("net: sched: introduce chain object to uapi")
Cc: Jiri Pirko <j...@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 net/sched/cls_api.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 1a67af8a6e8c..0a75cb2e5e7b 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -1902,6 +1902,8 @@ static int tc_ctl_chain(struct sk_buff *skb, struct 
nlmsghdr *n,
                                RTM_NEWCHAIN, false);
                break;
        case RTM_DELCHAIN:
+               tfilter_notify_chain(net, skb, block, q, parent, n,
+                                    chain, RTM_DELTFILTER);
                /* Flush the chain first as the user requested chain removal. */
                tcf_chain_flush(chain);
                /* In case the chain was successfully deleted, put a reference
-- 
2.14.4