[PATCH v4 2/2] net/bond: allow slaves to also be bonded devices

[Declan Doherty <declan.doherty@intel.com>]

From: Tomasz Kulasek <tomaszx.kulasek@intel.com>

This patch removes restrictions in bonded device library which prevent a
bonded device to be added to another bonded device with the limitation
that 802.3ad mode is not supported if one or more slaves is also a
bonded device,

Signed-off-by: Declan Doherty <declan.doherty@intel.com>
---
v4:
 - rebase
 
v3:
 - reworked link management changes and split into separate patch

v2 changes:

 - added dynamic link speed recalculation for a bonding

drivers/net/bonding/rte_eth_bond_api.c     | 28 +++++++++++++++++-----------
 drivers/net/bonding/rte_eth_bond_private.h |  2 +-
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_api.c b/drivers/net/bonding/rte_eth_bond_api.c
index 82c4499..824ab4f 100644
--- a/drivers/net/bonding/rte_eth_bond_api.c
+++ b/drivers/net/bonding/rte_eth_bond_api.c
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -63,13 +63,18 @@ valid_bonded_port_id(uint8_t port_id)
 }
 
 int
-valid_slave_port_id(uint8_t port_id)
+valid_slave_port_id(uint8_t port_id, uint8_t mode)
 {
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -1);
 
 	/* Verify that port_id refers to a non bonded port */
-	if (check_for_bonded_ethdev(&rte_eth_devices[port_id]) == 0)
+	if (check_for_bonded_ethdev(&rte_eth_devices[port_id]) == 0 &&
+			mode == BONDING_MODE_8023AD) {
+		RTE_BOND_LOG(ERR, "Cannot add slave to bonded device in 802.3ad"
+				" mode as slave is also a bonded device, only "
+				"physical devices can be support in this mode.");
 		return -1;
+	}
 
 	return 0;
 }
@@ -235,12 +240,12 @@ __eth_bond_slave_add_lock_free(uint8_t bonded_port_id, uint8_t slave_port_id)
 	struct rte_eth_link link_props;
 	struct rte_eth_dev_info dev_info;
 
-	if (valid_slave_port_id(slave_port_id) != 0)
-		return -1;
-
 	bonded_eth_dev = &rte_eth_devices[bonded_port_id];
 	internals = bonded_eth_dev->data->dev_private;
 
+	if (valid_slave_port_id(slave_port_id, internals->mode) != 0)
+		return -1;
+
 	slave_eth_dev = &rte_eth_devices[slave_port_id];
 	if (slave_eth_dev->data->dev_flags & RTE_ETH_DEV_BONDED_SLAVE) {
 		RTE_BOND_LOG(ERR, "Slave device is already a slave of a bonded device");
@@ -389,12 +394,12 @@ __eth_bond_slave_remove_lock_free(uint8_t bonded_port_id, uint8_t slave_port_id)
 	struct rte_eth_dev *slave_eth_dev;
 	int i, slave_idx;
 
-	if (valid_slave_port_id(slave_port_id) != 0)
-		return -1;
-
 	bonded_eth_dev = &rte_eth_devices[bonded_port_id];
 	internals = bonded_eth_dev->data->dev_private;
 
+	if (valid_slave_port_id(slave_port_id, internals->mode) < 0)
+		return -1;
+
 	/* first remove from active slave list */
 	slave_idx = find_slave_by_id(internals->active_slaves,
 		internals->active_slave_count, slave_port_id);
@@ -509,13 +514,14 @@ rte_eth_bond_primary_set(uint8_t bonded_port_id, uint8_t slave_port_id)
 {
 	struct bond_dev_private *internals;
 
+	internals =  rte_eth_devices[bonded_port_id].data->dev_private;
+
 	if (valid_bonded_port_id(bonded_port_id) != 0)
 		return -1;
 
-	if (valid_slave_port_id(slave_port_id) != 0)
+	if (valid_slave_port_id(slave_port_id, internals->mode) != 0)
 		return -1;
 
-	internals =  rte_eth_devices[bonded_port_id].data->dev_private;
 
 	internals->user_defined_primary_port = 1;
 	internals->primary_port = slave_port_id;
diff --git a/drivers/net/bonding/rte_eth_bond_private.h b/drivers/net/bonding/rte_eth_bond_private.h
index 7295192..8fbf4bf 100644
--- a/drivers/net/bonding/rte_eth_bond_private.h
+++ b/drivers/net/bonding/rte_eth_bond_private.h
@@ -204,7 +204,7 @@ int
 valid_bonded_port_id(uint8_t port_id);
 
 int
-valid_slave_port_id(uint8_t port_id);
+valid_slave_port_id(uint8_t port_id, uint8_t mode);
 
 void
 deactivate_slave(struct rte_eth_dev *eth_dev, uint8_t port_id);
-- 
2.9.4