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netfilter: flowtable: add function to invoke garbage collection immediately

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Expose nf_flow_table_gc_run() to force a garbage collector run from the
offload infrastructure.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2022-08-22 23:13:00 +02:00
parent e02f0d3970
commit 759eebbcfa
2 changed files with 10 additions and 3 deletions
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1
include/net/netfilter/nf_flow_table.h
View File

@ -270,6 +270,7 @@ void flow_offload_refresh(struct nf_flowtable *flow_table,
struct flow_offload_tuple_rhash *flow_offload_lookup(struct nf_flowtable *flow_table,
struct flow_offload_tuple *tuple);
void nf_flow_table_gc_run(struct nf_flowtable *flow_table);
void nf_flow_table_gc_cleanup(struct nf_flowtable *flowtable,
struct net_device *dev);
void nf_flow_table_cleanup(struct net_device *dev);

12
net/netfilter/nf_flow_table_core.c
View File

@ -437,12 +437,17 @@ static void nf_flow_offload_gc_step(struct nf_flowtable *flow_table,
}
}
void nf_flow_table_gc_run(struct nf_flowtable *flow_table)
{
nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
}
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_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
nf_flow_table_gc_run(flow_table);
queue_delayed_work(system_power_efficient_wq, &flow_table->gc_work, HZ);
}
@ -601,10 +606,11 @@ void nf_flow_table_free(struct nf_flowtable *flow_table)
cancel_delayed_work_sync(&flow_table->gc_work);
nf_flow_table_iterate(flow_table, nf_flow_table_do_cleanup, NULL);
nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
nf_flow_table_gc_run(flow_table);
nf_flow_table_offload_flush(flow_table);
if (nf_flowtable_hw_offload(flow_table))
nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
nf_flow_table_gc_run(flow_table);
rhashtable_destroy(&flow_table->rhashtable);
}
EXPORT_SYMBOL_GPL(nf_flow_table_free);