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netfilter: nft_flow_offload: move flowtable cleanup routines to nf_flow_table

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Move the flowtable cleanup routines to nf_flow_table and expose the
nf_flow_table_cleanup() helper function.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2018-02-06 13:22:44 +01:00
parent 7dc68e9875
commit c0ea1bcb39
3 changed files with 28 additions and 18 deletions
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3
include/net/netfilter/nf_flow_table.h
View file

@ -95,6 +95,9 @@ struct flow_offload_tuple_rhash *flow_offload_lookup(struct nf_flowtable *flow_t
int nf_flow_table_iterate(struct nf_flowtable *flow_table,
void (*iter)(struct flow_offload *flow, void *data),
void *data);
void nf_flow_table_cleanup(struct net *net, struct net_device *dev);
void nf_flow_offload_work_gc(struct work_struct *work);
extern const struct rhashtable_params nf_flow_offload_rhash_params;

24
net/netfilter/nf_flow_table.c
View file

@ -4,6 +4,7 @@
#include <linux/netfilter.h>
#include <linux/rhashtable.h>
#include <linux/netdevice.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nf_flow_table.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
@ -425,5 +426,28 @@ int nf_flow_dnat_port(const struct flow_offload *flow,
}
EXPORT_SYMBOL_GPL(nf_flow_dnat_port);
static void nf_flow_table_do_cleanup(struct flow_offload *flow, void *data)
{
struct net_device *dev = data;
if (dev && flow->tuplehash[0].tuple.iifidx != dev->ifindex)
return;
flow_offload_dead(flow);
}
static void nf_flow_table_iterate_cleanup(struct nf_flowtable *flowtable,
void *data)
{
nf_flow_table_iterate(flowtable, nf_flow_table_do_cleanup, data);
flush_delayed_work(&flowtable->gc_work);
}
void nf_flow_table_cleanup(struct net *net, struct net_device *dev)
{
nft_flow_table_iterate(net, nf_flow_table_iterate_cleanup, dev);
}
EXPORT_SYMBOL_GPL(nf_flow_table_cleanup);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");

19
net/netfilter/nft_flow_offload.c
View file

@ -194,23 +194,6 @@ static struct nft_expr_type nft_flow_offload_type __read_mostly = {
.owner = THIS_MODULE,
};
static void flow_offload_iterate_cleanup(struct flow_offload *flow, void *data)
{
struct net_device *dev = data;
if (dev && flow->tuplehash[0].tuple.iifidx != dev->ifindex)
return;
flow_offload_dead(flow);
}
static void nft_flow_offload_iterate_cleanup(struct nf_flowtable *flowtable,
void *data)
{
nf_flow_table_iterate(flowtable, flow_offload_iterate_cleanup, data);
flush_delayed_work(&flowtable->gc_work);
}
static int flow_offload_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
@ -219,7 +202,7 @@ static int flow_offload_netdev_event(struct notifier_block *this,
if (event != NETDEV_DOWN)
return NOTIFY_DONE;
nft_flow_table_iterate(dev_net(dev), nft_flow_offload_iterate_cleanup, dev);
nf_flow_table_cleanup(dev_net(dev), dev);
return NOTIFY_DONE;
}