netdev - [patch net-next v3 11/12] dsa: pass switch ID through devlink_port_attrs

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Date:   Tue,  2 Apr 2019 10:15:11 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, mlxsw@...lanox.com, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, f.fainelli@...il.com, andrew@...n.ch,
        vivien.didelot@...il.com, michael.chan@...adcom.com
Subject: [patch net-next v3 11/12] dsa: pass switch ID through devlink_port_attrs_set()

From: Jiri Pirko <jiri@...lanox.com>

Pass the switch ID down the to devlink through devlink_port_attrs_set()
so it can be used by devlink_compat_switch_id_get(). Leave
ndo_get_port_parent_id implementation only for legacy.

Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
v2->v3:
- fix parent id ndo compilation issue
---
 net/dsa/dsa2.c  | 4 +++-
 net/dsa/slave.c | 7 +++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 514be0583642..410cb0da9def 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -260,6 +260,7 @@ static int dsa_port_setup(struct dsa_port *dp)
 {
 	enum devlink_port_flavour flavour;
 	struct dsa_switch *ds = dp->ds;
+	struct dsa_switch_tree *dst = ds->dst;
 	int err;
 
 	if (dp->type == DSA_PORT_TYPE_UNUSED)
@@ -285,7 +286,8 @@ static int dsa_port_setup(struct dsa_port *dp)
 	 * independent from front panel port numbers.
 	 */
 	devlink_port_attrs_set(&dp->devlink_port, flavour,
-			       dp->index, false, 0, NULL, 0);
+			       dp->index, false, 0,
+			       (const char *) &dst->index, sizeof(dst->index));
 	err = devlink_port_register(ds->devlink, &dp->devlink_port,
 				    dp->index);
 	if (err)
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 80be8e86c82d..728decf8e605 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -379,6 +379,13 @@ static int dsa_slave_get_port_parent_id(struct net_device *dev,
 	struct dsa_switch *ds = dp->ds;
 	struct dsa_switch_tree *dst = ds->dst;
 
+	/* For non-legacy ports, devlink is used and it takes
+	 * care of the name generation. This ndo implementation
+	 * should be removed with legacy support.
+	 */
+	if (dp->ds->devlink)
+		return -EOPNOTSUPP;
+
 	ppid->id_len = sizeof(dst->index);
 	memcpy(&ppid->id, &dst->index, ppid->id_len);
 
-- 
2.17.2