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-rw-r--r--net/dsa/port.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/net/dsa/port.c b/net/dsa/port.c
new file mode 100644
index 000000000000..6cc4704190fd
--- /dev/null
+++ b/net/dsa/port.c
@@ -0,0 +1,55 @@
+/*
+ * Handling of a single switch port
+ *
+ * Copyright (c) 2017 Savoir-faire Linux Inc.
+ * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
+ *
+ * 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/if_bridge.h>
+
+#include "dsa_priv.h"
+
+int dsa_port_set_state(struct dsa_port *dp, u8 state,
+ struct switchdev_trans *trans)
+{
+ struct dsa_switch *ds = dp->ds;
+ int port = dp->index;
+
+ if (switchdev_trans_ph_prepare(trans))
+ return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
+
+ if (ds->ops->port_stp_state_set)
+ ds->ops->port_stp_state_set(ds, port, state);
+
+ if (ds->ops->port_fast_age) {
+ /* Fast age FDB entries or flush appropriate forwarding database
+ * for the given port, if we are moving it from Learning or
+ * Forwarding state, to Disabled or Blocking or Listening state.
+ */
+
+ if ((dp->stp_state == BR_STATE_LEARNING ||
+ dp->stp_state == BR_STATE_FORWARDING) &&
+ (state == BR_STATE_DISABLED ||
+ state == BR_STATE_BLOCKING ||
+ state == BR_STATE_LISTENING))
+ ds->ops->port_fast_age(ds, port);
+ }
+
+ dp->stp_state = state;
+
+ return 0;
+}
+
+void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
+{
+ int err;
+
+ err = dsa_port_set_state(dp, state, NULL);
+ if (err)
+ pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
+}