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netfilter: nf_flow_table: simplify nf_flow_offload_gc_step()

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nf_flow_offload_gc_step() and nf_flow_table_iterate() are very similar.
so that many duplicate code can be removed.
After this patch, nf_flow_offload_gc_step() is simple callback function of
nf_flow_table_iterate() like nf_flow_table_do_cleanup().

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Taehee Yoo 2018-11-07 00:33:07 +09:00 committed by Pablo Neira Ayuso
parent 49de9c090f
commit b966098769
1 changed files with 7 additions and 27 deletions
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34
net/netfilter/nf_flow_table_core.c
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@ -286,33 +286,13 @@ static inline bool nf_flow_has_expired(const struct flow_offload *flow)
return (__s32)(flow->timeout - (u32)jiffies) <= 0;
}
static void nf_flow_offload_gc_step(struct nf_flowtable *flow_table)
static void nf_flow_offload_gc_step(struct flow_offload *flow, void *data)
{
struct flow_offload_tuple_rhash *tuplehash;
struct rhashtable_iter hti;
struct flow_offload *flow;
struct nf_flowtable *flow_table = data;
rhashtable_walk_enter(&flow_table->rhashtable, &hti);
rhashtable_walk_start(&hti);
while ((tuplehash = rhashtable_walk_next(&hti))) {
if (IS_ERR(tuplehash)) {
if (PTR_ERR(tuplehash) != -EAGAIN)
break;
continue;
}
if (tuplehash->tuple.dir)
continue;
flow = container_of(tuplehash, struct flow_offload, tuplehash[0]);
if (nf_flow_has_expired(flow) ||
(flow->flags & (FLOW_OFFLOAD_DYING |
FLOW_OFFLOAD_TEARDOWN)))
flow_offload_del(flow_table, flow);
}
rhashtable_walk_stop(&hti);
rhashtable_walk_exit(&hti);
if (nf_flow_has_expired(flow) ||
(flow->flags & (FLOW_OFFLOAD_DYING | FLOW_OFFLOAD_TEARDOWN)))
flow_offload_del(flow_table, flow);
}
static void nf_flow_offload_work_gc(struct work_struct *work)
@ -320,7 +300,7 @@ static void nf_flow_offload_work_gc(struct work_struct *work)
struct nf_flowtable *flow_table;
flow_table = container_of(work, struct nf_flowtable, gc_work.work);
nf_flow_offload_gc_step(flow_table);
nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, flow_table);
queue_delayed_work(system_power_efficient_wq, &flow_table->gc_work, HZ);
}
@ -504,7 +484,7 @@ void nf_flow_table_free(struct nf_flowtable *flow_table)
mutex_unlock(&flowtable_lock);
cancel_delayed_work_sync(&flow_table->gc_work);
nf_flow_table_iterate(flow_table, nf_flow_table_do_cleanup, NULL);
nf_flow_offload_gc_step(flow_table);
nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, flow_table);
rhashtable_destroy(&flow_table->rhashtable);
}
EXPORT_SYMBOL_GPL(nf_flow_table_free);