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Merge branch 's390-qeth'
Karsten Graul says: ==================== s390/qeth: Add bridge to switchdev LEARNING_SYNC The netlink bridgeport attribute LEARNING_SYNC can be used to enable qeth interfaces to report MAC addresses that are reachable via this qeth interface to the attached software bridge via switchdev notifiers SWITCHDEV_FDB_ADD_TO_BRIDGE and SWITCHDEV_FDB_DEL_TO_BRIDGE. Extend this support of LEARNING_SYNC to the bridge to switchdev notifiers SWITCHDEV_FDB_ADD_TO_DEVICE and SWITCHDEV_FDB_DEL_TO_DEVICE. Add the capability to sync MAC addresses that are learned by a north-facing, non-isolated bridgeport of a software bridge to south-facing, isolated bridgeports. This enables the software bridge to influence south to north traffic steering in hardware. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
commit
709db03a8a
2 changed files with 237 additions and 3 deletions
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@ -74,6 +74,7 @@ config QETH_L2
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def_tristate y
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prompt "qeth layer 2 device support"
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depends on QETH
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depends on BRIDGE || BRIDGE=n
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help
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Select this option to be able to run qeth devices in layer 2 mode.
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To compile as a module, choose M. The module name is qeth_l2.
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@ -717,6 +717,227 @@ static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
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return rc;
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}
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struct qeth_l2_br2dev_event_work {
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struct work_struct work;
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struct net_device *br_dev;
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struct net_device *lsync_dev;
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struct net_device *dst_dev;
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unsigned long event;
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unsigned char addr[ETH_ALEN];
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};
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static const struct net_device_ops qeth_l2_netdev_ops;
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static bool qeth_l2_must_learn(struct net_device *netdev,
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struct net_device *dstdev)
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{
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struct qeth_priv *priv;
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priv = netdev_priv(netdev);
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return (netdev != dstdev &&
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(priv->brport_features & BR_LEARNING_SYNC) &&
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!(br_port_flag_is_set(netdev, BR_ISOLATED) &&
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br_port_flag_is_set(dstdev, BR_ISOLATED)) &&
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netdev->netdev_ops == &qeth_l2_netdev_ops);
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}
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/**
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* qeth_l2_br2dev_worker() - update local MACs
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* @work: bridge to device FDB update
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*
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* Update local MACs of a learning_sync bridgeport so it can receive
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* messages for a destination port.
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* In case of an isolated learning_sync port, also update its isolated
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* siblings.
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*/
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static void qeth_l2_br2dev_worker(struct work_struct *work)
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{
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struct qeth_l2_br2dev_event_work *br2dev_event_work =
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container_of(work, struct qeth_l2_br2dev_event_work, work);
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struct net_device *lsyncdev = br2dev_event_work->lsync_dev;
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struct net_device *dstdev = br2dev_event_work->dst_dev;
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struct net_device *brdev = br2dev_event_work->br_dev;
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unsigned long event = br2dev_event_work->event;
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unsigned char *addr = br2dev_event_work->addr;
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struct qeth_card *card = lsyncdev->ml_priv;
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struct net_device *lowerdev;
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struct list_head *iter;
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int err = 0;
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kfree(br2dev_event_work);
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QETH_CARD_TEXT_(card, 4, "b2dw%04x", event);
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QETH_CARD_TEXT_(card, 4, "ma%012lx", ether_addr_to_u64(addr));
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rcu_read_lock();
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/* Verify preconditions are still valid: */
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if (!netif_is_bridge_port(lsyncdev) ||
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brdev != netdev_master_upper_dev_get_rcu(lsyncdev))
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goto unlock;
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if (!qeth_l2_must_learn(lsyncdev, dstdev))
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goto unlock;
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if (br_port_flag_is_set(lsyncdev, BR_ISOLATED)) {
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/* Update lsyncdev and its isolated sibling(s): */
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iter = &brdev->adj_list.lower;
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lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
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while (lowerdev) {
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if (br_port_flag_is_set(lowerdev, BR_ISOLATED)) {
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switch (event) {
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case SWITCHDEV_FDB_ADD_TO_DEVICE:
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err = dev_uc_add(lowerdev, addr);
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break;
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case SWITCHDEV_FDB_DEL_TO_DEVICE:
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err = dev_uc_del(lowerdev, addr);
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break;
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default:
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break;
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}
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if (err) {
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QETH_CARD_TEXT(card, 2, "b2derris");
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QETH_CARD_TEXT_(card, 2,
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"err%02x%03d", event,
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lowerdev->ifindex);
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}
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}
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lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
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}
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} else {
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switch (event) {
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case SWITCHDEV_FDB_ADD_TO_DEVICE:
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err = dev_uc_add(lsyncdev, addr);
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break;
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case SWITCHDEV_FDB_DEL_TO_DEVICE:
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err = dev_uc_del(lsyncdev, addr);
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break;
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default:
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break;
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}
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if (err)
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QETH_CARD_TEXT_(card, 2, "b2derr%02x", event);
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}
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unlock:
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rcu_read_unlock();
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dev_put(brdev);
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dev_put(lsyncdev);
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dev_put(dstdev);
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}
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static int qeth_l2_br2dev_queue_work(struct net_device *brdev,
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struct net_device *lsyncdev,
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struct net_device *dstdev,
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unsigned long event,
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const unsigned char *addr)
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{
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struct qeth_l2_br2dev_event_work *worker_data;
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struct qeth_card *card;
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worker_data = kzalloc(sizeof(*worker_data), GFP_ATOMIC);
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if (!worker_data)
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return -ENOMEM;
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INIT_WORK(&worker_data->work, qeth_l2_br2dev_worker);
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worker_data->br_dev = brdev;
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worker_data->lsync_dev = lsyncdev;
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worker_data->dst_dev = dstdev;
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worker_data->event = event;
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ether_addr_copy(worker_data->addr, addr);
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card = lsyncdev->ml_priv;
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/* Take a reference on the sw port devices and the bridge */
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dev_hold(brdev);
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dev_hold(lsyncdev);
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dev_hold(dstdev);
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queue_work(card->event_wq, &worker_data->work);
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return 0;
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}
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/* Called under rtnl_lock */
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static int qeth_l2_switchdev_event(struct notifier_block *unused,
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unsigned long event, void *ptr)
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{
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struct net_device *dstdev, *brdev, *lowerdev;
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struct switchdev_notifier_fdb_info *fdb_info;
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struct switchdev_notifier_info *info = ptr;
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struct list_head *iter;
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struct qeth_card *card;
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int rc;
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if (!(event == SWITCHDEV_FDB_ADD_TO_DEVICE ||
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event == SWITCHDEV_FDB_DEL_TO_DEVICE))
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return NOTIFY_DONE;
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dstdev = switchdev_notifier_info_to_dev(info);
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brdev = netdev_master_upper_dev_get_rcu(dstdev);
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if (!brdev || !netif_is_bridge_master(brdev))
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return NOTIFY_DONE;
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fdb_info = container_of(info,
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struct switchdev_notifier_fdb_info,
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info);
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iter = &brdev->adj_list.lower;
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lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
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while (lowerdev) {
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if (qeth_l2_must_learn(lowerdev, dstdev)) {
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card = lowerdev->ml_priv;
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QETH_CARD_TEXT_(card, 4, "b2dqw%03x", event);
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rc = qeth_l2_br2dev_queue_work(brdev, lowerdev,
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dstdev, event,
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fdb_info->addr);
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if (rc) {
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QETH_CARD_TEXT(card, 2, "b2dqwerr");
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return NOTIFY_BAD;
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}
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}
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lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
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}
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return NOTIFY_DONE;
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}
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static struct notifier_block qeth_l2_sw_notifier = {
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.notifier_call = qeth_l2_switchdev_event,
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};
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static refcount_t qeth_l2_switchdev_notify_refcnt;
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/* Called under rtnl_lock */
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static void qeth_l2_br2dev_get(void)
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{
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int rc;
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if (!refcount_inc_not_zero(&qeth_l2_switchdev_notify_refcnt)) {
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rc = register_switchdev_notifier(&qeth_l2_sw_notifier);
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if (rc) {
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QETH_DBF_MESSAGE(2,
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"failed to register qeth_l2_sw_notifier: %d\n",
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rc);
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} else {
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refcount_set(&qeth_l2_switchdev_notify_refcnt, 1);
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QETH_DBF_MESSAGE(2, "qeth_l2_sw_notifier registered\n");
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}
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}
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QETH_DBF_TEXT_(SETUP, 2, "b2d+%04d",
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qeth_l2_switchdev_notify_refcnt.refs.counter);
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}
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/* Called under rtnl_lock */
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static void qeth_l2_br2dev_put(void)
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{
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int rc;
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if (refcount_dec_and_test(&qeth_l2_switchdev_notify_refcnt)) {
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rc = unregister_switchdev_notifier(&qeth_l2_sw_notifier);
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if (rc) {
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QETH_DBF_MESSAGE(2,
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"failed to unregister qeth_l2_sw_notifier: %d\n",
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rc);
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} else {
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QETH_DBF_MESSAGE(2,
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"qeth_l2_sw_notifier unregistered\n");
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}
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}
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QETH_DBF_TEXT_(SETUP, 2, "b2d-%04d",
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qeth_l2_switchdev_notify_refcnt.refs.counter);
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}
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static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
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struct net_device *dev, u32 filter_mask,
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int nlflags)
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@ -810,16 +1031,19 @@ static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
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} else if (enable) {
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qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
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rc = qeth_l2_dev2br_an_set(card, true);
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if (rc)
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if (rc) {
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qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
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else
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} else {
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priv->brport_features |= BR_LEARNING_SYNC;
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qeth_l2_br2dev_get();
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}
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} else {
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rc = qeth_l2_dev2br_an_set(card, false);
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if (!rc) {
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qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
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priv->brport_features ^= BR_LEARNING_SYNC;
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qeth_l2_dev2br_fdb_flush(card);
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qeth_l2_br2dev_put();
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}
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}
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mutex_unlock(&card->sbp_lock);
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@ -2072,6 +2296,7 @@ static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
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static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
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{
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struct qeth_card *card = dev_get_drvdata(&gdev->dev);
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struct qeth_priv *priv;
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if (gdev->dev.type != &qeth_l2_devtype)
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device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
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@ -2083,8 +2308,15 @@ static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
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qeth_set_offline(card, card->discipline, false);
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cancel_work_sync(&card->close_dev_work);
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if (card->dev->reg_state == NETREG_REGISTERED)
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if (card->dev->reg_state == NETREG_REGISTERED) {
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priv = netdev_priv(card->dev);
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if (priv->brport_features & BR_LEARNING_SYNC) {
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rtnl_lock();
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qeth_l2_br2dev_put();
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rtnl_unlock();
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}
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unregister_netdev(card->dev);
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}
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}
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static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
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@ -2207,6 +2439,7 @@ EXPORT_SYMBOL_GPL(qeth_l2_discipline);
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static int __init qeth_l2_init(void)
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{
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pr_info("register layer 2 discipline\n");
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refcount_set(&qeth_l2_switchdev_notify_refcnt, 0);
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return 0;
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}
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