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-rw-r--r--net/bridge/br_device.c59
-rw-r--r--net/bridge/br_forward.c23
-rw-r--r--net/bridge/br_if.c25
-rw-r--r--net/bridge/br_private.h2
4 files changed, 108 insertions, 1 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 82599405dc15..074c59690fc5 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -13,8 +13,10 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
+#include <linux/netpoll.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
+#include <linux/list.h>
#include <asm/uaccess.h>
#include "br_private.h"
@@ -188,6 +190,59 @@ static int br_set_tx_csum(struct net_device *dev, u32 data)
return 0;
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+bool br_devices_support_netpoll(struct net_bridge *br)
+{
+ struct net_bridge_port *p;
+ bool ret = true;
+ int count = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&br->lock, flags);
+ list_for_each_entry(p, &br->port_list, list) {
+ count++;
+ if ((p->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
+ !p->dev->netdev_ops->ndo_poll_controller)
+ ret = false;
+ }
+ spin_unlock_irqrestore(&br->lock, flags);
+ return count != 0 && ret;
+}
+
+static void br_poll_controller(struct net_device *br_dev)
+{
+ struct netpoll *np = br_dev->npinfo->netpoll;
+
+ if (np->real_dev != br_dev)
+ netpoll_poll_dev(np->real_dev);
+}
+
+void br_netpoll_cleanup(struct net_device *br_dev)
+{
+ struct net_bridge *br = netdev_priv(br_dev);
+ struct net_bridge_port *p, *n;
+ const struct net_device_ops *ops;
+
+ br->dev->npinfo = NULL;
+ list_for_each_entry_safe(p, n, &br->port_list, list) {
+ if (p->dev) {
+ ops = p->dev->netdev_ops;
+ if (ops->ndo_netpoll_cleanup)
+ ops->ndo_netpoll_cleanup(p->dev);
+ else
+ p->dev->npinfo = NULL;
+ }
+ }
+}
+
+#else
+
+void br_netpoll_cleanup(struct net_device *br_dev)
+{
+}
+
+#endif
+
static const struct ethtool_ops br_ethtool_ops = {
.get_drvinfo = br_getinfo,
.get_link = ethtool_op_get_link,
@@ -211,6 +266,10 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_set_multicast_list = br_dev_set_multicast_list,
.ndo_change_mtu = br_change_mtu,
.ndo_do_ioctl = br_dev_ioctl,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_cleanup = br_netpoll_cleanup,
+ .ndo_poll_controller = br_poll_controller,
+#endif
};
static void br_dev_free(struct net_device *dev)
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index 396f077216a3..92ad9feb199d 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -15,6 +15,7 @@
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
+#include <linux/netpoll.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/netfilter_bridge.h>
@@ -50,7 +51,13 @@ int br_dev_queue_push_xmit(struct sk_buff *skb)
else {
skb_push(skb, ETH_HLEN);
- dev_queue_xmit(skb);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (unlikely(skb->dev->priv_flags & IFF_IN_NETPOLL)) {
+ netpoll_send_skb(skb->dev->npinfo->netpoll, skb);
+ skb->dev->priv_flags &= ~IFF_IN_NETPOLL;
+ } else
+#endif
+ dev_queue_xmit(skb);
}
}
@@ -66,9 +73,23 @@ int br_forward_finish(struct sk_buff *skb)
static void __br_deliver(const struct net_bridge_port *to, struct sk_buff *skb)
{
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct net_bridge *br = to->br;
+ if (unlikely(br->dev->priv_flags & IFF_IN_NETPOLL)) {
+ struct netpoll *np;
+ to->dev->npinfo = skb->dev->npinfo;
+ np = skb->dev->npinfo->netpoll;
+ np->real_dev = np->dev = to->dev;
+ to->dev->priv_flags |= IFF_IN_NETPOLL;
+ }
+#endif
skb->dev = to->dev;
NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
br_forward_finish);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (skb->dev->npinfo)
+ skb->dev->npinfo->netpoll->dev = br->dev;
+#endif
}
static void __br_forward(const struct net_bridge_port *to, struct sk_buff *skb)
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 521439333316..537bdd60d9b9 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/netdevice.h>
+#include <linux/netpoll.h>
#include <linux/ethtool.h>
#include <linux/if_arp.h>
#include <linux/module.h>
@@ -153,6 +154,14 @@ static void del_nbp(struct net_bridge_port *p)
kobject_uevent(&p->kobj, KOBJ_REMOVE);
kobject_del(&p->kobj);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (br_devices_support_netpoll(br))
+ br->dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
+ if (dev->netdev_ops->ndo_netpoll_cleanup)
+ dev->netdev_ops->ndo_netpoll_cleanup(dev);
+ else
+ dev->npinfo = NULL;
+#endif
call_rcu(&p->rcu, destroy_nbp_rcu);
}
@@ -165,6 +174,8 @@ static void del_br(struct net_bridge *br, struct list_head *head)
del_nbp(p);
}
+ br_netpoll_cleanup(br->dev);
+
del_timer_sync(&br->gc_timer);
br_sysfs_delbr(br->dev);
@@ -444,6 +455,20 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)
kobject_uevent(&p->kobj, KOBJ_ADD);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (br_devices_support_netpoll(br)) {
+ br->dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
+ if (br->dev->npinfo)
+ dev->npinfo = br->dev->npinfo;
+ } else if (!(br->dev->priv_flags & IFF_DISABLE_NETPOLL)) {
+ br->dev->priv_flags |= IFF_DISABLE_NETPOLL;
+ printk(KERN_INFO "New device %s does not support netpoll\n",
+ dev->name);
+ printk(KERN_INFO "Disabling netpoll for %s\n",
+ br->dev->name);
+ }
+#endif
+
return 0;
err2:
br_fdb_delete_by_port(br, p, 1);
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 018499ebe19d..3d2d3fe0a97e 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -253,6 +253,8 @@ static inline int br_is_root_bridge(const struct net_bridge *br)
extern void br_dev_setup(struct net_device *dev);
extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
struct net_device *dev);
+extern bool br_devices_support_netpoll(struct net_bridge *br);
+extern void br_netpoll_cleanup(struct net_device *br_dev);
/* br_fdb.c */
extern int br_fdb_init(void);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 04:33:01 +0000