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firewire: net: invalidate ARP entries of removed nodes 

This makes it possible to resume communication with a node that dropped
off the bus for a brief period.  Otherwise communication will only be
possible after ARP cache entry timeouts.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (rebased)
This commit is contained in:
Maxim Levitsky 2010-11-29 04:09:52 +02:00 committed by Stefan Richter
parent c56eb8fb6d
commit 74a1450499
1 changed files with 8 additions and 1 deletions
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9
drivers/firewire/net.c
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@ -191,6 +191,7 @@ struct fwnet_peer {
struct fwnet_device *dev; struct fwnet_device *dev;
u64 guid; u64 guid;
u64 fifo; u64 fifo;
__be32 ip;
/* guarded by dev->lock */ /* guarded by dev->lock */
struct list_head pd_list; /* received partial datagrams */ struct list_head pd_list; /* received partial datagrams */
@ -570,6 +571,8 @@ static int fwnet_finish_incoming_packet(struct net_device *net,
peer->speed = sspd; peer->speed = sspd;
if (peer->max_payload > max_payload) if (peer->max_payload > max_payload)
peer->max_payload = max_payload; peer->max_payload = max_payload;
peer->ip = arp1394->sip;
} }
spin_unlock_irqrestore(&dev->lock, flags); spin_unlock_irqrestore(&dev->lock, flags);
@ -1470,6 +1473,7 @@ static int fwnet_add_peer(struct fwnet_device *dev,
peer->dev = dev; peer->dev = dev;
peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; peer->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
peer->fifo = FWNET_NO_FIFO_ADDR; peer->fifo = FWNET_NO_FIFO_ADDR;
peer->ip = 0;
INIT_LIST_HEAD(&peer->pd_list); INIT_LIST_HEAD(&peer->pd_list);
peer->pdg_size = 0; peer->pdg_size = 0;
peer->datagram_label = 0; peer->datagram_label = 0;
@ -1589,10 +1593,13 @@ static int fwnet_remove(struct device *_dev)
mutex_lock(&fwnet_device_mutex); mutex_lock(&fwnet_device_mutex);
net = dev->netdev;
if (net && peer->ip)
arp_invalidate(net, peer->ip);
fwnet_remove_peer(peer, dev); fwnet_remove_peer(peer, dev);
if (list_empty(&dev->peer_list)) { if (list_empty(&dev->peer_list)) {
net = dev->netdev;
unregister_netdev(net); unregister_netdev(net);
if (dev->local_fifo != FWNET_NO_FIFO_ADDR) if (dev->local_fifo != FWNET_NO_FIFO_ADDR)