diff options
author | WANG Cong <amwang@redhat.com> | 2010-05-06 07:48:24 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-05-06 07:48:24 (GMT) |
commit | c06ee961d3c0e51009cbd0e123b61fbb97f37d0b (patch) | |
tree | 5d5899374a6f32f5ab77a78e6baeeb4a122a4721 /net/bridge | |
parent | 0e34e93177fb1f642cab080e0bde664c06c7183a (diff) | |
download | linux-c06ee961d3c0e51009cbd0e123b61fbb97f37d0b.tar.xz |
bridge: make bridge support netpoll
Based on the previous patch, make bridge support netpoll by:
1) implement the 2 methods to support netpoll for bridge;
2) modify netpoll during forwarding packets via bridge;
3) disable netpoll support of bridge when a netpoll-unabled device
is added to bridge;
4) enable netpoll support when all underlying devices support netpoll.
Cc: David Miller <davem@davemloft.net>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
-rw-r--r-- | net/bridge/br_device.c | 59 | ||||
-rw-r--r-- | net/bridge/br_forward.c | 23 | ||||
-rw-r--r-- | net/bridge/br_if.c | 25 | ||||
-rw-r--r-- | net/bridge/br_private.h | 2 |
4 files changed, 108 insertions, 1 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 8259940..074c596 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 396f077..92ad9fe 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 5214393..537bdd6 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 018499e..3d2d3fe 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); |