netdev - [PATCH iproute2-next v2 1/2] devlink: Expose number of port lanes

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Date:   Thu, 30 Jul 2020 17:33:17 +0300
From:   Danielle Ratson <danieller@...lanox.com>
To:     netdev@...r.kernel.org
Cc:     dsahern@...il.com, stephen@...workplumber.org, mlxsw@...lanox.com,
        Danielle Ratson <danieller@...lanox.com>
Subject: [PATCH iproute2-next v2 1/2] devlink: Expose number of port lanes

Add a new attribute that indicates the port's number of lanes to devlink port.

Expose the attribute to user space as RO value, for example:

$devlink port show swp1
pci/0000:03:00.0/61: type eth netdev swp1 flavour physical port 1 lanes 1

Signed-off-by: Danielle Ratson <danieller@...lanox.com>
---
 devlink/devlink.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 7dbe9c7e..39bc1119 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -581,6 +581,7 @@ static const enum mnl_attr_data_type devlink_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_PORT_NETDEV_IFINDEX] = MNL_TYPE_U32,
 	[DEVLINK_ATTR_PORT_NETDEV_NAME] = MNL_TYPE_NUL_STRING,
 	[DEVLINK_ATTR_PORT_IBDEV_NAME] = MNL_TYPE_NUL_STRING,
+	[DEVLINK_ATTR_PORT_LANES] = MNL_TYPE_U32,
 	[DEVLINK_ATTR_SB_INDEX] = MNL_TYPE_U32,
 	[DEVLINK_ATTR_SB_SIZE] = MNL_TYPE_U32,
 	[DEVLINK_ATTR_SB_INGRESS_POOL_COUNT] = MNL_TYPE_U16,
@@ -3423,6 +3424,10 @@ static void pr_out_port(struct dl *dl, struct nlattr **tb)
 	if (tb[DEVLINK_ATTR_PORT_SPLIT_GROUP])
 		print_uint(PRINT_ANY, "split_group", " split_group %u",
 			   mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_SPLIT_GROUP]));
+	if (tb[DEVLINK_ATTR_PORT_LANES])
+		print_uint(PRINT_ANY, "lanes", " lanes %u",
+			   mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_LANES]));
+
 	pr_out_port_function(dl, tb);
 	pr_out_port_handle_end(dl);
 }
-- 
2.20.1