netfilter: flowtable: Make sure GC works periodically in idle system

[ Upstream commit 740b486a8d1f966e68ac0666f1fd57441a7cda94 ]

Currently flowtable's GC work is initialized as deferrable, which
means GC cannot work on time when system is idle. So the hardware
offloaded flow may be deleted for timeout, since its used time is
not timely updated.

Resolve it by initializing the GC work as delayed work instead of
deferrable.

Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 4a4acbb..b03feb6 100644 (file)
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -506,7 +506,7 @@ int nf_flow_table_init(struct nf_flowtable *flowtable)
 {
        int err;
 
-       INIT_DEFERRABLE_WORK(&flowtable->gc_work, nf_flow_offload_work_gc);
+       INIT_DELAYED_WORK(&flowtable->gc_work, nf_flow_offload_work_gc);
        flow_block_init(&flowtable->flow_block);
        init_rwsem(&flowtable->flow_block_lock);