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authorLennert Buytenhek <buytenh@marvell.com>2008-11-10 21:53:12 -0800
committerDavid S. Miller <davem@davemloft.net>2008-11-10 21:53:12 -0800
commitdf02c6ff2e3937379b31ea161b53229134fe92f7 (patch)
tree93e76bcd230de65599709b5520bd53c337ebd432 /net/dsa
parent14ee6742b1b5df275cd2d771b4562b4f808c9419 (diff)
downloadvexpress-lsk-df02c6ff2e3937379b31ea161b53229134fe92f7.tar.gz
dsa: fix master interface allmulti/promisc handling
Before commit b6c40d68ff6498b7f63ddf97cf0aa818d748dee7 ("net: only invoke dev->change_rx_flags when device is UP"), the dsa driver could sort-of get away with only fiddling with the master interface's allmulti/promisc counts in ->change_rx_flags() and not touching them in ->open() or ->stop(). After this commit (note that it was merged almost simultaneously with the dsa patches, which is why this wasn't caught initially), the breakage that was already there became more apparent. Since it makes no sense to keep the master interface's allmulti or promisc count pinned for a slave interface that is down, copy the vlan driver's sync logic (which does exactly what we want) over to dsa to fix this. Bug report from Dirk Teurlings <dirk@upexia.nl> and Peter van Valderen <linux@ddcrew.com>. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Tested-by: Peter van Valderen <linux@ddcrew.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/slave.c72
1 files changed, 70 insertions, 2 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 37616884b8a..1af5a79309e 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -10,6 +10,7 @@
#include <linux/list.h>
#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include <linux/phy.h>
#include "dsa_priv.h"
@@ -49,11 +50,57 @@ void dsa_slave_mii_bus_init(struct dsa_switch *ds)
/* slave device handling ****************************************************/
static int dsa_slave_open(struct net_device *dev)
{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->master_netdev;
+ int err;
+
+ if (!(master->flags & IFF_UP))
+ return -ENETDOWN;
+
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr)) {
+ err = dev_unicast_add(master, dev->dev_addr, ETH_ALEN);
+ if (err < 0)
+ goto out;
+ }
+
+ if (dev->flags & IFF_ALLMULTI) {
+ err = dev_set_allmulti(master, 1);
+ if (err < 0)
+ goto del_unicast;
+ }
+ if (dev->flags & IFF_PROMISC) {
+ err = dev_set_promiscuity(master, 1);
+ if (err < 0)
+ goto clear_allmulti;
+ }
+
return 0;
+
+clear_allmulti:
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(master, -1);
+del_unicast:
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr))
+ dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
+out:
+ return err;
}
static int dsa_slave_close(struct net_device *dev)
{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->master_netdev;
+
+ dev_mc_unsync(master, dev);
+ dev_unicast_unsync(master, dev);
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(master, -1);
+ if (dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(master, -1);
+
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr))
+ dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
+
return 0;
}
@@ -77,9 +124,30 @@ static void dsa_slave_set_rx_mode(struct net_device *dev)
dev_unicast_sync(master, dev);
}
-static int dsa_slave_set_mac_address(struct net_device *dev, void *addr)
+static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
{
- memcpy(dev->dev_addr, addr + 2, 6);
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->master_netdev;
+ struct sockaddr *addr = a;
+ int err;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (!(dev->flags & IFF_UP))
+ goto out;
+
+ if (compare_ether_addr(addr->sa_data, master->dev_addr)) {
+ err = dev_unicast_add(master, addr->sa_data, ETH_ALEN);
+ if (err < 0)
+ return err;
+ }
+
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr))
+ dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
+
+out:
+ memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
return 0;
}