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bridge: add support for user mode STP

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This patchset based on work by Aji_Srinivas@emc.com provides allows
spanning tree to be controled from userspace.  Like hotplug, it
uses call_usermodehelper when spanning tree is enabled so there
is no visible API change. If call to start usermode STP fails
it falls back to existing kernel STP.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
This commit is contained in:
Stephen Hemminger
2007-03-21 14:22:44 -07:00
committed by David S. Miller
parent 9cf637473c
commit 9cde070874
8 changed files with 96 additions and 17 deletions
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19
net/bridge/br_stp_bpdu.c
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@@ -33,9 +33,6 @@ static void br_send_bpdu(struct net_bridge_port *p,
{
struct sk_buff *skb;
if (!p->br->stp_enabled)
return;
skb = dev_alloc_skb(length+LLC_RESERVE);
if (!skb)
return;
@@ -75,6 +72,9 @@ void br_send_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu)
{
unsigned char buf[35];
if (p->br->stp_enabled != BR_KERNEL_STP)
return;
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
@@ -117,6 +117,9 @@ void br_send_tcn_bpdu(struct net_bridge_port *p)
{
unsigned char buf[4];
if (p->br->stp_enabled != BR_KERNEL_STP)
return;
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
@@ -157,9 +160,13 @@ int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
br = p->br;
spin_lock(&br->lock);
if (p->state == BR_STATE_DISABLED
|| !br->stp_enabled
|| !(br->dev->flags & IFF_UP))
if (br->stp_enabled != BR_KERNEL_STP)
goto out;
if (!(br->dev->flags & IFF_UP))
goto out;
if (p->state == BR_STATE_DISABLED)
goto out;
if (compare_ether_addr(dest, br->group_addr) != 0)