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netfilter: nf_flow_table: move conntrack object to struct flow_offload 

Simplify this code by storing the pointer to conntrack object in the
flow_offload structure.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2019-11-12 00:29:51 +01:00 committed by David S. Miller
parent 4717b05328
commit b32d2f3416
2 changed files with 12 additions and 24 deletions
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1
include/net/netfilter/nf_flow_table.h
View File

@ -72,6 +72,7 @@ struct flow_offload_tuple_rhash {
struct flow_offload {
struct flow_offload_tuple_rhash tuplehash[FLOW_OFFLOAD_DIR_MAX];
struct nf_conn *ct;
u32 flags;
union {
/* Your private driver data here. */

35
net/netfilter/nf_flow_table_core.c
View File

@ -16,7 +16,6 @@
struct flow_offload_entry {
struct flow_offload flow;
struct nf_conn *ct;
struct rcu_head rcu_head;
};
@ -79,7 +78,7 @@ flow_offload_alloc(struct nf_conn *ct, struct nf_flow_route *route)
if (!dst_hold_safe(route->tuple[FLOW_OFFLOAD_DIR_REPLY].dst))
goto err_dst_cache_reply;
entry->ct = ct;
flow->ct = ct;
flow_offload_fill_dir(flow, ct, route, FLOW_OFFLOAD_DIR_ORIGINAL);
flow_offload_fill_dir(flow, ct, route, FLOW_OFFLOAD_DIR_REPLY);
@ -158,8 +157,8 @@ void flow_offload_free(struct flow_offload *flow)
dst_release(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_cache);
e = container_of(flow, struct flow_offload_entry, flow);
if (flow->flags & FLOW_OFFLOAD_DYING)
nf_ct_delete(e->ct, 0, 0);
nf_ct_put(e->ct);
nf_ct_delete(flow->ct, 0, 0);
nf_ct_put(flow->ct);
kfree_rcu(e, rcu_head);
}
EXPORT_SYMBOL_GPL(flow_offload_free);
@ -232,8 +231,6 @@ static inline bool nf_flow_has_expired(const struct flow_offload *flow)
static void flow_offload_del(struct nf_flowtable *flow_table,
struct flow_offload *flow)
{
struct flow_offload_entry *e;
rhashtable_remove_fast(&flow_table->rhashtable,
&flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].node,
nf_flow_offload_rhash_params);
@ -241,25 +238,21 @@ static void flow_offload_del(struct nf_flowtable *flow_table,
&flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].node,
nf_flow_offload_rhash_params);
e = container_of(flow, struct flow_offload_entry, flow);
clear_bit(IPS_OFFLOAD_BIT, &e->ct->status);
clear_bit(IPS_OFFLOAD_BIT, &flow->ct->status);
if (nf_flow_has_expired(flow))
flow_offload_fixup_ct(e->ct);
flow_offload_fixup_ct(flow->ct);
else if (flow->flags & FLOW_OFFLOAD_TEARDOWN)
flow_offload_fixup_ct_timeout(e->ct);
flow_offload_fixup_ct_timeout(flow->ct);
flow_offload_free(flow);
}
void flow_offload_teardown(struct flow_offload *flow)
{
struct flow_offload_entry *e;
flow->flags |= FLOW_OFFLOAD_TEARDOWN;
e = container_of(flow, struct flow_offload_entry, flow);
flow_offload_fixup_ct_state(e->ct);
flow_offload_fixup_ct_state(flow->ct);
}
EXPORT_SYMBOL_GPL(flow_offload_teardown);
@ -269,7 +262,6 @@ flow_offload_lookup(struct nf_flowtable *flow_table,
{
struct flow_offload_tuple_rhash *tuplehash;
struct flow_offload *flow;
struct flow_offload_entry *e;
int dir;
tuplehash = rhashtable_lookup(&flow_table->rhashtable, tuple,
@ -282,8 +274,7 @@ flow_offload_lookup(struct nf_flowtable *flow_table,
if (flow->flags & (FLOW_OFFLOAD_DYING | FLOW_OFFLOAD_TEARDOWN))
return NULL;
e = container_of(flow, struct flow_offload_entry, flow);
if (unlikely(nf_ct_is_dying(e->ct)))
if (unlikely(nf_ct_is_dying(flow->ct)))
return NULL;
return tuplehash;
@ -327,10 +318,8 @@ nf_flow_table_iterate(struct nf_flowtable *flow_table,
static void nf_flow_offload_gc_step(struct flow_offload *flow, void *data)
{
struct nf_flowtable *flow_table = data;
struct flow_offload_entry *e;
e = container_of(flow, struct flow_offload_entry, flow);
if (nf_flow_has_expired(flow) || nf_ct_is_dying(e->ct) ||
if (nf_flow_has_expired(flow) || nf_ct_is_dying(flow->ct) ||
(flow->flags & (FLOW_OFFLOAD_DYING | FLOW_OFFLOAD_TEARDOWN)))
flow_offload_del(flow_table, flow);
}
@ -485,15 +474,13 @@ EXPORT_SYMBOL_GPL(nf_flow_table_init);
static void nf_flow_table_do_cleanup(struct flow_offload *flow, void *data)
{
struct net_device *dev = data;
struct flow_offload_entry *e;
e = container_of(flow, struct flow_offload_entry, flow);
if (!dev) {
flow_offload_teardown(flow);
return;
}
if (net_eq(nf_ct_net(e->ct), dev_net(dev)) &&
if (net_eq(nf_ct_net(flow->ct), dev_net(dev)) &&
(flow->tuplehash[0].tuple.iifidx == dev->ifindex ||
flow->tuplehash[1].tuple.iifidx == dev->ifindex))
flow_offload_dead(flow);