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-rw-r--r--net/switchdev/switchdev.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index 070698dd19bc..0b2c18efc079 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -378,6 +378,266 @@ int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
}
EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers);
+struct switchdev_nested_priv {
+ bool (*check_cb)(const struct net_device *dev);
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev);
+ const struct net_device *dev;
+ struct net_device *lower_dev;
+};
+
+static int switchdev_lower_dev_walk(struct net_device *lower_dev,
+ struct netdev_nested_priv *priv)
+{
+ struct switchdev_nested_priv *switchdev_priv = priv->data;
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev);
+ bool (*check_cb)(const struct net_device *dev);
+ const struct net_device *dev;
+
+ check_cb = switchdev_priv->check_cb;
+ foreign_dev_check_cb = switchdev_priv->foreign_dev_check_cb;
+ dev = switchdev_priv->dev;
+
+ if (check_cb(lower_dev) && !foreign_dev_check_cb(lower_dev, dev)) {
+ switchdev_priv->lower_dev = lower_dev;
+ return 1;
+ }
+
+ return 0;
+}
+
+static struct net_device *
+switchdev_lower_dev_find(struct net_device *dev,
+ bool (*check_cb)(const struct net_device *dev),
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev))
+{
+ struct switchdev_nested_priv switchdev_priv = {
+ .check_cb = check_cb,
+ .foreign_dev_check_cb = foreign_dev_check_cb,
+ .dev = dev,
+ .lower_dev = NULL,
+ };
+ struct netdev_nested_priv priv = {
+ .data = &switchdev_priv,
+ };
+
+ netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv);
+
+ return switchdev_priv.lower_dev;
+}
+
+static int __switchdev_handle_fdb_add_to_device(struct net_device *dev,
+ const struct net_device *orig_dev,
+ const struct switchdev_notifier_fdb_info *fdb_info,
+ bool (*check_cb)(const struct net_device *dev),
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev),
+ int (*add_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info),
+ int (*lag_add_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info))
+{
+ const struct switchdev_notifier_info *info = &fdb_info->info;
+ struct net_device *br, *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ if (check_cb(dev))
+ return add_cb(dev, orig_dev, info->ctx, fdb_info);
+
+ if (netif_is_lag_master(dev)) {
+ if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
+ goto maybe_bridged_with_us;
+
+ /* This is a LAG interface that we offload */
+ if (!lag_add_cb)
+ return -EOPNOTSUPP;
+
+ return lag_add_cb(dev, orig_dev, info->ctx, fdb_info);
+ }
+
+ /* Recurse through lower interfaces in case the FDB entry is pointing
+ * towards a bridge device.
+ */
+ if (netif_is_bridge_master(dev)) {
+ if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
+ return 0;
+
+ /* This is a bridge interface that we offload */
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ /* Do not propagate FDB entries across bridges */
+ if (netif_is_bridge_master(lower_dev))
+ continue;
+
+ /* Bridge ports might be either us, or LAG interfaces
+ * that we offload.
+ */
+ if (!check_cb(lower_dev) &&
+ !switchdev_lower_dev_find(lower_dev, check_cb,
+ foreign_dev_check_cb))
+ continue;
+
+ err = __switchdev_handle_fdb_add_to_device(lower_dev, orig_dev,
+ fdb_info, check_cb,
+ foreign_dev_check_cb,
+ add_cb, lag_add_cb);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return 0;
+ }
+
+maybe_bridged_with_us:
+ /* Event is neither on a bridge nor a LAG. Check whether it is on an
+ * interface that is in a bridge with us.
+ */
+ br = netdev_master_upper_dev_get_rcu(dev);
+ if (!br || !netif_is_bridge_master(br))
+ return 0;
+
+ if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb))
+ return 0;
+
+ return __switchdev_handle_fdb_add_to_device(br, orig_dev, fdb_info,
+ check_cb, foreign_dev_check_cb,
+ add_cb, lag_add_cb);
+}
+
+int switchdev_handle_fdb_add_to_device(struct net_device *dev,
+ const struct switchdev_notifier_fdb_info *fdb_info,
+ bool (*check_cb)(const struct net_device *dev),
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev),
+ int (*add_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info),
+ int (*lag_add_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info))
+{
+ int err;
+
+ err = __switchdev_handle_fdb_add_to_device(dev, dev, fdb_info,
+ check_cb,
+ foreign_dev_check_cb,
+ add_cb, lag_add_cb);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_fdb_add_to_device);
+
+static int __switchdev_handle_fdb_del_to_device(struct net_device *dev,
+ const struct net_device *orig_dev,
+ const struct switchdev_notifier_fdb_info *fdb_info,
+ bool (*check_cb)(const struct net_device *dev),
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev),
+ int (*del_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info),
+ int (*lag_del_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info))
+{
+ const struct switchdev_notifier_info *info = &fdb_info->info;
+ struct net_device *br, *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ if (check_cb(dev))
+ return del_cb(dev, orig_dev, info->ctx, fdb_info);
+
+ if (netif_is_lag_master(dev)) {
+ if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
+ goto maybe_bridged_with_us;
+
+ /* This is a LAG interface that we offload */
+ if (!lag_del_cb)
+ return -EOPNOTSUPP;
+
+ return lag_del_cb(dev, orig_dev, info->ctx, fdb_info);
+ }
+
+ /* Recurse through lower interfaces in case the FDB entry is pointing
+ * towards a bridge device.
+ */
+ if (netif_is_bridge_master(dev)) {
+ if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
+ return 0;
+
+ /* This is a bridge interface that we offload */
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ /* Do not propagate FDB entries across bridges */
+ if (netif_is_bridge_master(lower_dev))
+ continue;
+
+ /* Bridge ports might be either us, or LAG interfaces
+ * that we offload.
+ */
+ if (!check_cb(lower_dev) &&
+ !switchdev_lower_dev_find(lower_dev, check_cb,
+ foreign_dev_check_cb))
+ continue;
+
+ err = __switchdev_handle_fdb_del_to_device(lower_dev, orig_dev,
+ fdb_info, check_cb,
+ foreign_dev_check_cb,
+ del_cb, lag_del_cb);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return 0;
+ }
+
+maybe_bridged_with_us:
+ /* Event is neither on a bridge nor a LAG. Check whether it is on an
+ * interface that is in a bridge with us.
+ */
+ br = netdev_master_upper_dev_get_rcu(dev);
+ if (!br || !netif_is_bridge_master(br))
+ return 0;
+
+ if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb))
+ return 0;
+
+ return __switchdev_handle_fdb_del_to_device(br, orig_dev, fdb_info,
+ check_cb, foreign_dev_check_cb,
+ del_cb, lag_del_cb);
+}
+
+int switchdev_handle_fdb_del_to_device(struct net_device *dev,
+ const struct switchdev_notifier_fdb_info *fdb_info,
+ bool (*check_cb)(const struct net_device *dev),
+ bool (*foreign_dev_check_cb)(const struct net_device *dev,
+ const struct net_device *foreign_dev),
+ int (*del_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info),
+ int (*lag_del_cb)(struct net_device *dev,
+ const struct net_device *orig_dev, const void *ctx,
+ const struct switchdev_notifier_fdb_info *fdb_info))
+{
+ int err;
+
+ err = __switchdev_handle_fdb_del_to_device(dev, dev, fdb_info,
+ check_cb,
+ foreign_dev_check_cb,
+ del_cb, lag_del_cb);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_fdb_del_to_device);
+
static int __switchdev_handle_port_obj_add(struct net_device *dev,
struct switchdev_notifier_port_obj_info *port_obj_info,
bool (*check_cb)(const struct net_device *dev),
@@ -549,3 +809,51 @@ int switchdev_handle_port_attr_set(struct net_device *dev,
return err;
}
EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set);
+
+int switchdev_bridge_port_offload(struct net_device *brport_dev,
+ struct net_device *dev, const void *ctx,
+ struct notifier_block *atomic_nb,
+ struct notifier_block *blocking_nb,
+ bool tx_fwd_offload,
+ struct netlink_ext_ack *extack)
+{
+ struct switchdev_notifier_brport_info brport_info = {
+ .brport = {
+ .dev = dev,
+ .ctx = ctx,
+ .atomic_nb = atomic_nb,
+ .blocking_nb = blocking_nb,
+ .tx_fwd_offload = tx_fwd_offload,
+ },
+ };
+ int err;
+
+ ASSERT_RTNL();
+
+ err = call_switchdev_blocking_notifiers(SWITCHDEV_BRPORT_OFFLOADED,
+ brport_dev, &brport_info.info,
+ extack);
+ return notifier_to_errno(err);
+}
+EXPORT_SYMBOL_GPL(switchdev_bridge_port_offload);
+
+void switchdev_bridge_port_unoffload(struct net_device *brport_dev,
+ const void *ctx,
+ struct notifier_block *atomic_nb,
+ struct notifier_block *blocking_nb)
+{
+ struct switchdev_notifier_brport_info brport_info = {
+ .brport = {
+ .ctx = ctx,
+ .atomic_nb = atomic_nb,
+ .blocking_nb = blocking_nb,
+ },
+ };
+
+ ASSERT_RTNL();
+
+ call_switchdev_blocking_notifiers(SWITCHDEV_BRPORT_UNOFFLOADED,
+ brport_dev, &brport_info.info,
+ NULL);
+}
+EXPORT_SYMBOL_GPL(switchdev_bridge_port_unoffload);
generated by cgit (git 2.34.1) at 2024-06-19 10:53:18 +0000