diff options
Diffstat (limited to 'net/bridge/br_if.c')
| -rw-r--r-- | net/bridge/br_if.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index ca685c0cdf95..a0e9a7937412 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -563,18 +563,32 @@ int br_add_if(struct net_bridge *br, struct net_device *dev, unsigned br_hr, dev_hr; bool changed_addr; - /* Don't allow bridging non-ethernet like devices, or DSA-enabled - * master network devices since the bridge layer rx_handler prevents - * the DSA fake ethertype handler to be invoked, so we do not strip off - * the DSA switch tag protocol header and the bridge layer just return - * RX_HANDLER_CONSUMED, stopping RX processing for these frames. - */ + /* Don't allow bridging non-ethernet like devices. */ if ((dev->flags & IFF_LOOPBACK) || dev->type != ARPHRD_ETHER || dev->addr_len != ETH_ALEN || - !is_valid_ether_addr(dev->dev_addr) || - netdev_uses_dsa(dev)) + !is_valid_ether_addr(dev->dev_addr)) return -EINVAL; + /* Also don't allow bridging of net devices that are DSA masters, since + * the bridge layer rx_handler prevents the DSA fake ethertype handler + * to be invoked, so we don't get the chance to strip off and parse the + * DSA switch tag protocol header (the bridge layer just returns + * RX_HANDLER_CONSUMED, stopping RX processing for these frames). + * The only case where that would not be an issue is when bridging can + * already be offloaded, such as when the DSA master is itself a DSA + * or plain switchdev port, and is bridged only with other ports from + * the same hardware device. + */ + if (netdev_uses_dsa(dev)) { + list_for_each_entry(p, &br->port_list, list) { + if (!netdev_port_same_parent_id(dev, p->dev)) { + NL_SET_ERR_MSG(extack, + "Cannot do software bridging with a DSA master"); + return -EINVAL; + } + } + } + /* No bridging of bridges */ if (dev->netdev_ops->ndo_start_xmit == br_dev_xmit) { NL_SET_ERR_MSG(extack, @@ -618,7 +632,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev, if (err) goto err3; - err = netdev_rx_handler_register(dev, br_handle_frame, p); + err = netdev_rx_handler_register(dev, br_get_rx_handler(dev), p); if (err) goto err4; |