diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 02:20:36 +0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/bridge/br_notify.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'net/bridge/br_notify.c')
-rw-r--r-- | net/bridge/br_notify.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/net/bridge/br_notify.c b/net/bridge/br_notify.c new file mode 100644 index 000000000000..f8fb49e34764 --- /dev/null +++ b/net/bridge/br_notify.c @@ -0,0 +1,87 @@ +/* + * Device event handling + * Linux ethernet bridge + * + * Authors: + * Lennert Buytenhek <buytenh@gnu.org> + * + * $Id: br_notify.c,v 1.2 2000/02/21 15:51:34 davem Exp $ + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/kernel.h> + +#include "br_private.h" + +static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr); + +struct notifier_block br_device_notifier = { + .notifier_call = br_device_event +}; + +/* + * Handle changes in state of network devices enslaved to a bridge. + * + * Note: don't care about up/down if bridge itself is down, because + * port state is checked when bridge is brought up. + */ +static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr) +{ + struct net_device *dev = ptr; + struct net_bridge_port *p = dev->br_port; + struct net_bridge *br; + + /* not a port of a bridge */ + if (p == NULL) + return NOTIFY_DONE; + + br = p->br; + + spin_lock_bh(&br->lock); + switch (event) { + case NETDEV_CHANGEMTU: + dev_set_mtu(br->dev, br_min_mtu(br)); + break; + + case NETDEV_CHANGEADDR: + br_fdb_changeaddr(p, dev->dev_addr); + 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); + } + break; + + case NETDEV_DOWN: + if (br->dev->flags & IFF_UP) + br_stp_disable_port(p); + break; + + case NETDEV_UP: + if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP)) + br_stp_enable_port(p); + break; + + case NETDEV_UNREGISTER: + spin_unlock_bh(&br->lock); + br_del_if(br, dev); + goto done; + } + spin_unlock_bh(&br->lock); + + done: + return NOTIFY_DONE; +} |