bond: Add bonding driver and LACP protocol

Add bonding driver to support creation of bond interface which composes of
multiple slave interfaces. The slave interfaces could be physical interfaces,
or just any virtual interfaces. For example, memif interfaces.

The syntax to create a bond interface is
create bond mode <lacp | xor | acitve-backup | broadcast | round-robin>

To enslave an interface to the bond interface,
enslave interface TenGigabitEthernet6/0/0 to BondEthernet0

Please see src/plugins/lacp/lacp_doc.md for more examples and additional
options.

LACP is a control plane protocol which manages and monitors the status of
the slave interfaces. The protocol is part of 802.3ad standard. This patch
implements LACPv1. LACPv2 is not supported.
To enable LACP on the bond interface, specify "mode lacp" when the bond
interface is created. The syntax to enslave a slave interface is the same as
other bonding modes.

Change-Id: I06581d3b87635972f9f0e1ec50b67560fc13e26c
Signed-off-by: Steven <sluong@cisco.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/src/plugins/lacp/rx_machine.h b/src/plugins/lacp/rx_machine.h
new file mode 100644
index 00000000000..706dbd08c67
--- /dev/null
+++ b/src/plugins/lacp/rx_machine.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef	__LACP_RX_MACHINE_H__
+#define	__LACP_RX_MACHINE_H__
+
+#include <stdint.h>
+#include <lacp/machine.h>
+
+#define foreach_lacp_rx_event          \
+  _(0, BEGIN, "begin")                 \
+  _(1, PORT_DISABLED, "port disabled") \
+  _(2, PORT_MOVED, "port moved")       \
+  _(3, LACP_ENABLED, "lacp enabled")   \
+  _(4, LACP_DISABLED, "lacp disabled") \
+  _(5, PDU_RECEIVED, "pdu received")   \
+  _(6, TIMER_EXPIRED, "timer expired")
+
+typedef enum
+{
+#define _(a, b, c) LACP_RX_EVENT_##b = (a),
+  foreach_lacp_rx_event
+#undef _
+} lacp_rx_event_t;
+
+#define foreach_lacp_rx_sm_state       \
+  _(0, INITIALIZE, "initialize")       \
+  _(1, PORT_DISABLED, "port disabled") \
+  _(2, EXPIRED, "expired")             \
+  _(3, LACP_DISABLED, "lacp disabled") \
+  _(4, DEFAULTED, "defaulted")         \
+  _(5, CURRENT, "current")
+
+typedef enum
+{
+#define _(a, b, c) LACP_RX_STATE_##b = (a),
+  foreach_lacp_rx_sm_state
+#undef _
+} lacp_rx_sm_state_t;
+
+extern lacp_machine_t lacp_rx_machine;
+
+int lacp_rx_action_initialize (void *, void *);
+int lacp_rx_action_port_disabled (void *, void *);
+int lacp_rx_action_pdu_received (void *, void *);
+int lacp_rx_action_expired (void *, void *);
+int lacp_rx_action_lacp_disabled (void *, void *);
+int lacp_rx_action_defaulted (void *, void *);
+int lacp_rx_action_current (void *, void *);
+void lacp_rx_debug_func (slave_if_t * sif, int event, int state,
+			 lacp_fsm_state_t * transition);
+
+#define LACP_ACTION_INITIALIZE \
+  LACP_ACTION_ROUTINE(lacp_rx_action_initialize)
+#define LACP_ACTION_PORT_DISABLED \
+  LACP_ACTION_ROUTINE(lacp_rx_action_port_disabled)
+#define LACP_ACTION_EXPIRED \
+  LACP_ACTION_ROUTINE(lacp_rx_action_expired)
+#define LACP_ACTION_LACP_DISABLED \
+  LACP_ACTION_ROUTINE(lacp_rx_action_lacp_disabled)
+#define LACP_ACTION_DEFAULTED LACP_ACTION_ROUTINE(lacp_rx_action_defaulted)
+#define LACP_ACTION_CURRENT LACP_ACTION_ROUTINE(lacp_rx_action_current)
+
+static inline void
+lacp_start_current_while_timer (vlib_main_t * vm, slave_if_t * sif,
+				u8 expiration)
+{
+  sif->current_while_timer = vlib_time_now (vm) + expiration;
+}
+
+#endif /* __LACP_RX_MACHINE_H__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */