Stephen Hemminger
2007-Apr-18 12:34 UTC
[Bridge] [PATCH 2/5] bridge: handle speed detection after carrier changes
Speed of a interface may not be available until carrier
is detected in the case of autonegotiation. To get the correct value
we need to recheck speed after carrier event. But the check needs to
be done in a context that is similar to normal ethtool interface (can sleep).
Also, delay check for 1ms to try avoid any carrier bounce transitions.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
--- br-2.6.16.orig/net/bridge/br_if.c
+++ br-2.6.16/net/bridge/br_if.c
@@ -32,9 +32,8 @@
* ethtool, use ethtool_ops. Also, since driver might sleep need to
* not be holding any locks.
*/
-static int br_initial_port_cost(struct net_device *dev)
+static int port_cost(struct net_device *dev)
{
-
struct ethtool_cmd ecmd = { ETHTOOL_GSET };
struct ifreq ifr;
mm_segment_t old_fs;
@@ -58,10 +57,6 @@ static int br_initial_port_cost(struct n
return 2;
case SPEED_10:
return 100;
- default:
- pr_info("bridge: can't decode speed from %s: %d\n",
- dev->name, ecmd.speed);
- return 100;
}
}
@@ -75,6 +70,35 @@ static int br_initial_port_cost(struct n
return 100; /* assume old 10Mbps */
}
+
+/*
+ * Check for port carrier transistions.
+ * Called from work queue to allow for calling functions that
+ * might sleep (such as speed check), and to debounce.
+ */
+static void port_carrier_check(void *arg)
+{
+ struct net_bridge_port *p = arg;
+
+ rtnl_lock();
+ if (netif_carrier_ok(p->dev)) {
+ u32 cost = port_cost(p->dev);
+
+ spin_lock_bh(&p->br->lock);
+ if (p->state == BR_STATE_DISABLED) {
+ p->path_cost = cost;
+ br_stp_enable_port(p);
+ }
+ spin_unlock_bh(&p->br->lock);
+ } else {
+ spin_lock_bh(&p->br->lock);
+ if (p->state != BR_STATE_DISABLED)
+ br_stp_disable_port(p);
+ spin_unlock_bh(&p->br->lock);
+ }
+ rtnl_unlock();
+}
+
static void destroy_nbp(struct net_bridge_port *p)
{
struct net_device *dev = p->dev;
@@ -102,6 +126,9 @@ static void del_nbp(struct net_bridge_po
dev->br_port = NULL;
dev_set_promiscuity(dev, -1);
+ cancel_delayed_work(&p->carrier_check);
+ flush_scheduled_work();
+
spin_lock_bh(&br->lock);
br_stp_disable_port(p);
spin_unlock_bh(&br->lock);
@@ -195,10 +222,9 @@ static int find_portno(struct net_bridge
return (index >= BR_MAX_PORTS) ? -EXFULL : index;
}
-/* called with RTNL */
+/* called with RTNL but without bridge lock */
static struct net_bridge_port *new_nbp(struct net_bridge *br,
- struct net_device *dev,
- unsigned long cost)
+ struct net_device *dev)
{
int index;
struct net_bridge_port *p;
@@ -215,12 +241,13 @@ static struct net_bridge_port *new_nbp(s
p->br = br;
dev_hold(dev);
p->dev = dev;
- p->path_cost = cost;
+ p->path_cost = port_cost(dev);
p->priority = 0x8000 >> BR_PORT_BITS;
dev->br_port = p;
p->port_no = index;
br_init_port(p);
p->state = BR_STATE_DISABLED;
+ INIT_WORK(&p->carrier_check, port_carrier_check, p);
kobject_init(&p->kobj);
return p;
@@ -351,7 +378,7 @@ int br_add_if(struct net_bridge *br, str
if (dev->br_port != NULL)
return -EBUSY;
- if (IS_ERR(p = new_nbp(br, dev, br_initial_port_cost(dev))))
+ if (IS_ERR(p = new_nbp(br, dev)))
return PTR_ERR(p);
if ((err = br_fdb_insert(br, p, dev->dev_addr)))
--- br-2.6.16.orig/net/bridge/br_notify.c
+++ br-2.6.16/net/bridge/br_notify.c
@@ -52,17 +52,9 @@ static int br_device_event(struct notifi
br_stp_recalculate_bridge_id(br);
break;
- case NETDEV_CHANGE: /* device is up but carrier changed */
- if (!(br->dev->flags & IFF_UP))
- break;
-
- if (netif_carrier_ok(dev)) {
- if (p->state == BR_STATE_DISABLED)
- br_stp_enable_port(p);
- } else {
- if (p->state != BR_STATE_DISABLED)
- br_stp_disable_port(p);
- }
+ case NETDEV_CHANGE:
+ if (br->dev->flags & IFF_UP)
+ schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);
break;
case NETDEV_FEAT_CHANGE:
--- br-2.6.16.orig/net/bridge/br_private.h
+++ br-2.6.16/net/bridge/br_private.h
@@ -27,6 +27,8 @@
#define BR_PORT_BITS 10
#define BR_MAX_PORTS (1<<BR_PORT_BITS)
+#define BR_PORT_DEBOUNCE (HZ/10)
+
typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;
@@ -78,6 +80,7 @@ struct net_bridge_port
struct timer_list hold_timer;
struct timer_list message_age_timer;
struct kobject kobj;
+ struct work_struct carrier_check;
struct rcu_head rcu;
};
--
Stephen Hemminger <shemminger@osdl.org>
OSDL http://developer.osdl.org/~shemminger
From: Stephen Hemminger <shemminger@osdl.org> Date: Tue, 20 Dec 2005 15:19:49 -0800> Number of new features for 2.6.16. > * limited ethtool > * set hardware address of bridge pseudo-interface > * speed detection when link carrier changesLooks good, all applied. Thanks Stephen.
Number of new features for 2.6.16. * limited ethtool * set hardware address of bridge pseudo-interface * speed detection when link carrier changes -- Stephen Hemminger <shemminger@osdl.org> OSDL http://developer.osdl.org/~shemminger
Add version info to bridge module.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
--- br-2.6.16.orig/net/bridge/br.c
+++ br-2.6.16/net/bridge/br.c
@@ -67,3 +67,4 @@ EXPORT_SYMBOL(br_should_route_hook);
module_init(br_init)
module_exit(br_deinit)
MODULE_LICENSE("GPL");
+MODULE_VERSION(BR_VERSION);
--- br-2.6.16.orig/net/bridge/br_private.h
+++ br-2.6.16/net/bridge/br_private.h
@@ -29,6 +29,8 @@
#define BR_PORT_DEBOUNCE (HZ/10)
+#define BR_VERSION "2.1"
+
typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;
--
Stephen Hemminger <shemminger@osdl.org>
OSDL http://developer.osdl.org/~shemminger
Stephen Hemminger
2007-Apr-18 12:34 UTC
[Bridge] [PATCH 4/5] bridge: limited ethtool support
Add limited ethtool support to bridge to allow disabling
features.
Note: if underlying device does not support a feature (like checksum
offload), then the bridge device won't inherit it.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
--- br-2.6.16.orig/net/bridge/br_device.c
+++ br-2.6.16/net/bridge/br_device.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
#include <asm/uaccess.h>
#include "br_private.h"
@@ -106,6 +107,64 @@ static int br_set_mac_address(struct net
return err;
}
+static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, "bridge");
+ strcpy(info->version, BR_VERSION);
+ strcpy(info->fw_version, "N/A");
+ strcpy(info->bus_info, "N/A");
+}
+
+static int br_set_sg(struct net_device *dev, u32 data)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ if (data)
+ br->feature_mask |= NETIF_F_SG;
+ else
+ br->feature_mask &= ~NETIF_F_SG;
+
+ br_features_recompute(br);
+ return 0;
+}
+
+static int br_set_tso(struct net_device *dev, u32 data)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ if (data)
+ br->feature_mask |= NETIF_F_TSO;
+ else
+ br->feature_mask &= ~NETIF_F_TSO;
+
+ br_features_recompute(br);
+ return 0;
+}
+
+static int br_set_tx_csum(struct net_device *dev, u32 data)
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ if (data)
+ br->feature_mask |= NETIF_F_IP_CSUM;
+ else
+ br->feature_mask &= ~NETIF_F_IP_CSUM;
+
+ br_features_recompute(br);
+ return 0;
+}
+
+static struct ethtool_ops br_ethtool_ops = {
+ .get_drvinfo = br_getinfo,
+ .get_link = ethtool_op_get_link,
+ .get_sg = ethtool_op_get_sg,
+ .set_sg = br_set_sg,
+ .get_tx_csum = ethtool_op_get_tx_csum,
+ .set_tx_csum = br_set_tx_csum,
+ .get_tso = ethtool_op_get_tso,
+ .set_tso = br_set_tso,
+};
+
void br_dev_setup(struct net_device *dev)
{
memset(dev->dev_addr, 0, ETH_ALEN);
@@ -120,8 +179,12 @@ void br_dev_setup(struct net_device *dev
dev->change_mtu = br_change_mtu;
dev->destructor = free_netdev;
SET_MODULE_OWNER(dev);
+ SET_ETHTOOL_OPS(dev, &br_ethtool_ops);
dev->stop = br_dev_stop;
dev->tx_queue_len = 0;
dev->set_mac_address = br_set_mac_address;
dev->priv_flags = IFF_EBRIDGE;
+
+ dev->features = NETIF_F_SG | NETIF_F_FRAGLIST
+ | NETIF_F_HIGHDMA | NETIF_F_TSO | NETIF_F_IP_CSUM;
}
--- br-2.6.16.orig/net/bridge/br_if.c
+++ br-2.6.16/net/bridge/br_if.c
@@ -182,6 +182,7 @@ static struct net_device *new_bridge_dev
br->bridge_id.prio[1] = 0x00;
memset(br->bridge_id.addr, 0, ETH_ALEN);
+ br->feature_mask = dev->features;
br->stp_enabled = 0;
br->designated_root = br->bridge_id;
br->root_path_cost = 0;
@@ -349,9 +350,8 @@ void br_features_recompute(struct net_br
struct net_bridge_port *p;
unsigned long features, checksum;
- features = NETIF_F_SG | NETIF_F_FRAGLIST
- | NETIF_F_HIGHDMA | NETIF_F_TSO;
- checksum = NETIF_F_IP_CSUM; /* least commmon subset */
+ features = br->feature_mask &~ NETIF_F_IP_CSUM;
+ checksum = br->feature_mask & NETIF_F_IP_CSUM;
list_for_each_entry(p, &br->port_list, list) {
if (!(p->dev->features
--- br-2.6.16.orig/net/bridge/br_private.h
+++ br-2.6.16/net/bridge/br_private.h
@@ -93,6 +93,7 @@ struct net_bridge
spinlock_t hash_lock;
struct hlist_head hash[BR_HASH_SIZE];
struct list_head age_list;
+ unsigned long feature_mask;
/* STP */
bridge_id designated_root;
--
Stephen Hemminger <shemminger@osdl.org>
OSDL http://developer.osdl.org/~shemminger
Stephen Hemminger
2007-Apr-18 12:34 UTC
[Bridge] [PATCH 1/5] bridge: allow setting hardware address of bridge pseudo-dev
Some people are using bridging to hide multiple machines from an ISP
that restricts by MAC address. So in that case allow the bridge mac
address to be set to any of the existing interfaces. I don't want to
allow any arbitrary value and confuse STP.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
--- br-2.6.orig/net/bridge/br_device.c
+++ br-2.6/net/bridge/br_device.c
@@ -15,7 +15,8 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
-#include <linux/module.h>
+#include <linux/etherdevice.h>
+
#include <asm/uaccess.h>
#include "br_private.h"
@@ -82,6 +83,29 @@ static int br_change_mtu(struct net_devi
return 0;
}
+/* Allow setting mac address of pseudo-bridge to be same as
+ * any of the bound interfaces
+ */
+static int br_set_mac_address(struct net_device *dev, void *p)
+{
+ struct net_bridge *br = netdev_priv(dev);
+ struct sockaddr *addr = p;
+ struct net_bridge_port *port;
+ int err = -EADDRNOTAVAIL;
+
+ spin_lock_bh(&br->lock);
+ list_for_each_entry(port, &br->port_list, list) {
+ if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
+ br_stp_change_bridge_id(br, addr->sa_data);
+ err = 0;
+ break;
+ }
+ }
+ spin_unlock_bh(&br->lock);
+
+ return err;
+}
+
void br_dev_setup(struct net_device *dev)
{
memset(dev->dev_addr, 0, ETH_ALEN);
@@ -98,6 +122,6 @@ void br_dev_setup(struct net_device *dev
SET_MODULE_OWNER(dev);
dev->stop = br_dev_stop;
dev->tx_queue_len = 0;
- dev->set_mac_address = NULL;
+ dev->set_mac_address = br_set_mac_address;
dev->priv_flags = IFF_EBRIDGE;
}
--- br-2.6.orig/net/bridge/br_private.h
+++ br-2.6/net/bridge/br_private.h
@@ -201,6 +201,7 @@ extern void br_stp_disable_bridge(struct
extern void br_stp_enable_port(struct net_bridge_port *p);
extern void br_stp_disable_port(struct net_bridge_port *p);
extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
+extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char
*a);
extern void br_stp_set_bridge_priority(struct net_bridge *br,
u16 newprio);
extern void br_stp_set_port_priority(struct net_bridge_port *p,
--- br-2.6.orig/net/bridge/br_stp_if.c
+++ br-2.6/net/bridge/br_stp_if.c
@@ -120,8 +120,7 @@ void br_stp_disable_port(struct net_brid
}
/* called under bridge lock */
-static void br_stp_change_bridge_id(struct net_bridge *br,
- const unsigned char *addr)
+void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *addr)
{
unsigned char oldaddr[6];
struct net_bridge_port *p;
--
Stephen Hemminger <shemminger@osdl.org>
OSDL http://developer.osdl.org/~shemminger
Stephen Hemminger
2007-Apr-18 12:34 UTC
[Bridge] [PATCH 3/5] bridge: filter packets in learning state
While in the learning state, run filters but drop the result.
This prevents us from acquiring bad fdb entries in learning state.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
--- br-2.6.orig/net/bridge/br_input.c
+++ br-2.6/net/bridge/br_input.c
@@ -53,6 +53,11 @@ int br_handle_frame_finish(struct sk_buf
/* insert into forwarding database after filtering to avoid spoofing */
br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
+ if (p->state == BR_STATE_LEARNING) {
+ kfree_skb(skb);
+ goto out;
+ }
+
if (br->dev->flags & IFF_PROMISC) {
struct sk_buff *skb2;
@@ -107,9 +112,6 @@ int br_handle_frame(struct net_bridge_po
if (!is_valid_ether_addr(eth_hdr(skb)->h_source))
goto err;
- if (p->state == BR_STATE_LEARNING)
- br_fdb_update(p->br, p, eth_hdr(skb)->h_source);
-
if (p->br->stp_enabled &&
!memcmp(dest, bridge_ula, 5) &&
!(dest[5] & 0xF0)) {
@@ -118,9 +120,10 @@ int br_handle_frame(struct net_bridge_po
NULL, br_stp_handle_bpdu);
return 1;
}
+ goto err;
}
- else if (p->state == BR_STATE_FORWARDING) {
+ if (p->state == BR_STATE_FORWARDING || p->state == BR_STATE_LEARNING) {
if (br_should_route_hook) {
if (br_should_route_hook(pskb))
return 0;
--
Stephen Hemminger <shemminger@osdl.org>
OSDL http://developer.osdl.org/~shemminger