#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_tuple.h>
-struct flow_offload_entry {
- struct flow_offload flow;
- struct nf_conn *ct;
- struct rcu_head rcu_head;
-};
-
static DEFINE_MUTEX(flowtable_lock);
static LIST_HEAD(flowtables);
static void
-flow_offload_fill_dir(struct flow_offload *flow, struct nf_conn *ct,
- struct nf_flow_route *route,
+flow_offload_fill_dir(struct flow_offload *flow,
enum flow_offload_tuple_dir dir)
{
struct flow_offload_tuple *ft = &flow->tuplehash[dir].tuple;
- struct nf_conntrack_tuple *ctt = &ct->tuplehash[dir].tuple;
- struct dst_entry *other_dst = route->tuple[!dir].dst;
- struct dst_entry *dst = route->tuple[dir].dst;
+ struct nf_conntrack_tuple *ctt = &flow->ct->tuplehash[dir].tuple;
ft->dir = dir;
case NFPROTO_IPV4:
ft->src_v4 = ctt->src.u3.in;
ft->dst_v4 = ctt->dst.u3.in;
- ft->mtu = ip_dst_mtu_maybe_forward(dst, true);
break;
case NFPROTO_IPV6:
ft->src_v6 = ctt->src.u3.in6;
ft->dst_v6 = ctt->dst.u3.in6;
- ft->mtu = ip6_dst_mtu_forward(dst);
break;
}
ft->l4proto = ctt->dst.protonum;
ft->src_port = ctt->src.u.tcp.port;
ft->dst_port = ctt->dst.u.tcp.port;
-
- ft->iifidx = other_dst->dev->ifindex;
- ft->dst_cache = dst;
}
-struct flow_offload *
-flow_offload_alloc(struct nf_conn *ct, struct nf_flow_route *route)
+struct flow_offload *flow_offload_alloc(struct nf_conn *ct)
{
- struct flow_offload_entry *entry;
struct flow_offload *flow;
if (unlikely(nf_ct_is_dying(ct) ||
!atomic_inc_not_zero(&ct->ct_general.use)))
return NULL;
- entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
- if (!entry)
+ flow = kzalloc(sizeof(*flow), GFP_ATOMIC);
+ if (!flow)
goto err_ct_refcnt;
- flow = &entry->flow;
+ flow->ct = ct;
- if (!dst_hold_safe(route->tuple[FLOW_OFFLOAD_DIR_ORIGINAL].dst))
- goto err_dst_cache_original;
-
- if (!dst_hold_safe(route->tuple[FLOW_OFFLOAD_DIR_REPLY].dst))
- goto err_dst_cache_reply;
-
- entry->ct = ct;
-
- flow_offload_fill_dir(flow, ct, route, FLOW_OFFLOAD_DIR_ORIGINAL);
- flow_offload_fill_dir(flow, ct, route, FLOW_OFFLOAD_DIR_REPLY);
+ flow_offload_fill_dir(flow, FLOW_OFFLOAD_DIR_ORIGINAL);
+ flow_offload_fill_dir(flow, FLOW_OFFLOAD_DIR_REPLY);
if (ct->status & IPS_SRC_NAT)
flow->flags |= FLOW_OFFLOAD_SNAT;
return flow;
-err_dst_cache_reply:
- dst_release(route->tuple[FLOW_OFFLOAD_DIR_ORIGINAL].dst);
-err_dst_cache_original:
- kfree(entry);
err_ct_refcnt:
nf_ct_put(ct);
}
EXPORT_SYMBOL_GPL(flow_offload_alloc);
+static int flow_offload_fill_route(struct flow_offload *flow,
+ const struct nf_flow_route *route,
+ enum flow_offload_tuple_dir dir)
+{
+ struct flow_offload_tuple *flow_tuple = &flow->tuplehash[dir].tuple;
+ struct dst_entry *other_dst = route->tuple[!dir].dst;
+ struct dst_entry *dst = route->tuple[dir].dst;
+
+ if (!dst_hold_safe(route->tuple[dir].dst))
+ return -1;
+
+ switch (flow_tuple->l3proto) {
+ case NFPROTO_IPV4:
+ flow_tuple->mtu = ip_dst_mtu_maybe_forward(dst, true);
+ break;
+ case NFPROTO_IPV6:
+ flow_tuple->mtu = ip6_dst_mtu_forward(dst);
+ break;
+ }
+
+ flow_tuple->iifidx = other_dst->dev->ifindex;
+ flow_tuple->dst_cache = dst;
+
+ return 0;
+}
+
+int flow_offload_route_init(struct flow_offload *flow,
+ const struct nf_flow_route *route)
+{
+ int err;
+
+ err = flow_offload_fill_route(flow, route, FLOW_OFFLOAD_DIR_ORIGINAL);
+ if (err < 0)
+ return err;
+
+ err = flow_offload_fill_route(flow, route, FLOW_OFFLOAD_DIR_REPLY);
+ if (err < 0)
+ goto err_route_reply;
+
+ flow->type = NF_FLOW_OFFLOAD_ROUTE;
+
+ return 0;
+
+err_route_reply:
+ dst_release(route->tuple[FLOW_OFFLOAD_DIR_ORIGINAL].dst);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(flow_offload_route_init);
+
static void flow_offload_fixup_tcp(struct ip_ct_tcp *tcp)
{
tcp->state = TCP_CONNTRACK_ESTABLISHED;
flow_offload_fixup_ct_timeout(ct);
}
-void flow_offload_free(struct flow_offload *flow)
+static void flow_offload_route_release(struct flow_offload *flow)
{
- struct flow_offload_entry *e;
-
dst_release(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_cache);
dst_release(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_cache);
- e = container_of(flow, struct flow_offload_entry, flow);
+}
+
+void flow_offload_free(struct flow_offload *flow)
+{
+ switch (flow->type) {
+ case NF_FLOW_OFFLOAD_ROUTE:
+ flow_offload_route_release(flow);
+ break;
+ default:
+ break;
+ }
if (flow->flags & FLOW_OFFLOAD_DYING)
- nf_ct_delete(e->ct, 0, 0);
- nf_ct_put(e->ct);
- kfree_rcu(e, rcu_head);
+ nf_ct_delete(flow->ct, 0, 0);
+ nf_ct_put(flow->ct);
+ kfree_rcu(flow, rcu_head);
}
EXPORT_SYMBOL_GPL(flow_offload_free);
return err;
}
+ if (flow_table->flags & NF_FLOWTABLE_HW_OFFLOAD)
+ nf_flow_offload_add(flow_table, flow);
+
return 0;
}
EXPORT_SYMBOL_GPL(flow_offload_add);
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);
&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);
{
struct flow_offload_tuple_rhash *tuplehash;
struct flow_offload *flow;
- struct flow_offload_entry *e;
int dir;
tuplehash = rhashtable_lookup(&flow_table->rhashtable, tuple,
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;
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) ||
- (flow->flags & (FLOW_OFFLOAD_DYING | FLOW_OFFLOAD_TEARDOWN)))
- flow_offload_del(flow_table, flow);
+ if (flow->flags & FLOW_OFFLOAD_HW)
+ nf_flow_offload_stats(flow_table, flow);
+
+ if (nf_flow_has_expired(flow) || nf_ct_is_dying(flow->ct) ||
+ (flow->flags & (FLOW_OFFLOAD_DYING | FLOW_OFFLOAD_TEARDOWN))) {
+ if (flow->flags & FLOW_OFFLOAD_HW) {
+ if (!(flow->flags & FLOW_OFFLOAD_HW_DYING))
+ nf_flow_offload_del(flow_table, flow);
+ else if (flow->flags & FLOW_OFFLOAD_HW_DEAD)
+ flow_offload_del(flow_table, flow);
+ } else {
+ flow_offload_del(flow_table, flow);
+ }
+ }
}
static void nf_flow_offload_work_gc(struct work_struct *work)
int err;
INIT_DEFERRABLE_WORK(&flowtable->gc_work, nf_flow_offload_work_gc);
+ flow_block_init(&flowtable->flow_block);
err = rhashtable_init(&flowtable->rhashtable,
&nf_flow_offload_rhash_params);
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);
static void nf_flow_table_iterate_cleanup(struct nf_flowtable *flowtable,
struct net_device *dev)
{
+ nf_flow_table_offload_flush(flowtable);
nf_flow_table_iterate(flowtable, nf_flow_table_do_cleanup, dev);
flush_delayed_work(&flowtable->gc_work);
}
}
EXPORT_SYMBOL_GPL(nf_flow_table_free);
+static int __init nf_flow_table_module_init(void)
+{
+ return nf_flow_table_offload_init();
+}
+
+static void __exit nf_flow_table_module_exit(void)
+{
+ nf_flow_table_offload_exit();
+}
+
+module_init(nf_flow_table_module_init);
+module_exit(nf_flow_table_module_exit);
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
projects / linux.git / blobdiff