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bridge: Use STP demux

Browse source 
Use the STP demux layer for receiving STP PDUs instead of directly
registering with LLC.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-07-05 21:25:56 -07:00 committed by David S. Miller
parent a19800d704
commit 7c85fbf065
4 changed files with 16 additions and 18 deletions
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1
net/bridge/Kconfig
View file

@ -5,6 +5,7 @@
config BRIDGE
tristate "802.1d Ethernet Bridging"
select LLC
select STP
---help---
If you say Y here, then your Linux box will be able to act as an
Ethernet bridge, which means that the different Ethernet segments it

16
net/bridge/br.c
View file

@ -18,21 +18,24 @@
#include <linux/init.h>
#include <linux/llc.h>
#include <net/llc.h>
#include <net/stp.h>
#include "br_private.h"
int (*br_should_route_hook)(struct sk_buff *skb);
static struct llc_sap *br_stp_sap;
static const struct stp_proto br_stp_proto = {
.rcv = br_stp_rcv,
};
static int __init br_init(void)
{
int err;
br_stp_sap = llc_sap_open(LLC_SAP_BSPAN, br_stp_rcv);
if (!br_stp_sap) {
err = stp_proto_register(&br_stp_proto);
if (err < 0) {
printk(KERN_ERR "bridge: can't register sap for STP\n");
return -EADDRINUSE;
return err;
}
err = br_fdb_init();
@ -65,13 +68,13 @@ err_out2:
err_out1:
br_fdb_fini();
err_out:
llc_sap_put(br_stp_sap);
stp_proto_unregister(&br_stp_proto);
return err;
}
static void __exit br_deinit(void)
{
rcu_assign_pointer(br_stp_sap->rcv_func, NULL);
stp_proto_unregister(&br_stp_proto);
br_netlink_fini();
unregister_netdevice_notifier(&br_device_notifier);
@ -82,7 +85,6 @@ static void __exit br_deinit(void)
synchronize_net();
br_netfilter_fini();
llc_sap_put(br_stp_sap);
br_fdb_get_hook = NULL;
br_fdb_put_hook = NULL;

5
net/bridge/br_private.h
View file

@ -226,8 +226,9 @@ extern void br_stp_set_path_cost(struct net_bridge_port *p,
extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
/* br_stp_bpdu.c */
extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev);
struct stp_proto;
extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
struct net_device *dev);
/* br_stp_timer.c */
extern void br_stp_timer_init(struct net_bridge *br);

12
net/bridge/br_stp_bpdu.c
View file

@ -18,6 +18,7 @@
#include <net/net_namespace.h>
#include <net/llc.h>
#include <net/llc_pdu.h>
#include <net/stp.h>
#include <asm/unaligned.h>
#include "br_private.h"
@ -131,10 +132,9 @@ void br_send_tcn_bpdu(struct net_bridge_port *p)
*
* NO locks, but rcu_read_lock (preempt_disabled)
*/
int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
struct net_device *dev)
{
const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
const unsigned char *dest = eth_hdr(skb)->h_dest;
struct net_bridge_port *p = rcu_dereference(dev->br_port);
struct net_bridge *br;
@ -146,11 +146,6 @@ int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
if (!p)
goto err;
if (pdu->ssap != LLC_SAP_BSPAN
|| pdu->dsap != LLC_SAP_BSPAN
|| pdu->ctrl_1 != LLC_PDU_TYPE_U)
goto err;
if (!pskb_may_pull(skb, 4))
goto err;
@ -224,5 +219,4 @@ int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
spin_unlock(&br->lock);
err:
kfree_skb(skb);
return 0;
}