Linux Ethernet Bridging - Jun 2020 - [Bridge] [PATCH net v2 0/2] bridge: mrp: Update MRP_PORT_ROLE

This patch series does the following:
- fixes the enum br_mrp_port_role_type. It removes the port role none(0x2)
  because this is in conflict with the standard. The standard defines the
  interconnect port role as value 0x2.
- adds checks regarding current defined port roles: primary(0x0) and
  secondary(0x1).

v2:
 - add the validation code when setting the port role.

Horatiu Vultur (2):
  bridge: uapi: mrp: Fix MRP_PORT_ROLE
  bridge: mrp: Validate when setting the port role

 include/uapi/linux/mrp_bridge.h |  1 -
 net/bridge/br_mrp.c             | 10 ++++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

-- 
2.26.2

Currently the MRP_PORT_ROLE_NONE has the value 0x2 but this is in conflict
with the IEC 62439-2 standard. The standard defines the following port
roles: primary (0x0), secondary(0x1), interconnect(0x2).
Therefore remove the port role none.

Fixes: 4714d13791f831 ("bridge: uapi: mrp: Add mrp attributes.")
Signed-off-by: Horatiu Vultur <horatiu.vultur at microchip.com>
---
 include/uapi/linux/mrp_bridge.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/uapi/linux/mrp_bridge.h b/include/uapi/linux/mrp_bridge.h
index 84f15f48a7cb1..bee3665402129 100644
--- a/include/uapi/linux/mrp_bridge.h
+++ b/include/uapi/linux/mrp_bridge.h
@@ -36,7 +36,6 @@ enum br_mrp_port_state_type {
 enum br_mrp_port_role_type {
 	BR_MRP_PORT_ROLE_PRIMARY,
 	BR_MRP_PORT_ROLE_SECONDARY,
-	BR_MRP_PORT_ROLE_NONE,
 };
 
 enum br_mrp_tlv_header_type {
-- 
2.26.2

This patch adds specific checks for primary(0x0) and secondary(0x1) when
setting the port role. For any other value the function
'br_mrp_set_port_role' will return -EINVAL.

Fixes: 20f6a05ef63594 ("bridge: mrp: Rework the MRP netlink
interface")
Signed-off-by: Horatiu Vultur <horatiu.vultur at microchip.com>
---
 net/bridge/br_mrp.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c
index 24986ec7d38cc..779e1eb754430 100644
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c
@@ -411,10 +411,16 @@ int br_mrp_set_port_role(struct net_bridge_port *p,
 	if (!mrp)
 		return -EINVAL;
 
-	if (role == BR_MRP_PORT_ROLE_PRIMARY)
+	switch (role) {
+	case BR_MRP_PORT_ROLE_PRIMARY:
 		rcu_assign_pointer(mrp->p_port, p);
-	else
+		break;
+	case BR_MRP_PORT_ROLE_SECONDARY:
 		rcu_assign_pointer(mrp->s_port, p);
+		break;
+	default:
+		return -EINVAL;
+	}
 
 	br_mrp_port_switchdev_set_role(p, role);
 
-- 
2.26.2

From: Horatiu Vultur <horatiu.vultur at microchip.com>
Date: Tue, 23 Jun 2020 11:05:39 +0200
> This patch series does the following:
> - fixes the enum br_mrp_port_role_type. It removes the port role none(0x2)
>   because this is in conflict with the standard. The standard defines the
>   interconnect port role as value 0x2.
> - adds checks regarding current defined port roles: primary(0x0) and
>   secondary(0x1).
> 
> v2:
>  - add the validation code when setting the port role.
Series applied, thank you.