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bridge: mrp: Add support for role MRA

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A node that has the MRA role, it can behave as MRM or MRC.

Initially it starts as MRM and sends MRP_Test frames on both ring ports.
If it detects that there are MRP_Test send by another MRM, then it
checks if these frames have a lower priority than itself. In this case
it would send MRP_Nack frames to notify the other node that it needs to
stop sending MRP_Test frames.
If it receives a MRP_Nack frame then it stops sending MRP_Test frames
and starts to behave as a MRC but it would continue to monitor the
MRP_Test frames send by MRM. If at a point the MRM stops to send
MRP_Test frames it would get the MRM role and start to send MRP_Test
frames.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Horatiu Vultur
2020-05-30 18:09:48 +00:00
committed by David S. Miller
parent 4b3a61b030
commit c6676e7d62
7 changed files with 157 additions and 19 deletions
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4
net/bridge/br_mrp_switchdev.c
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@@ -65,7 +65,8 @@ int br_mrp_switchdev_set_ring_role(struct net_bridge *br,
int br_mrp_switchdev_send_ring_test(struct net_bridge *br,
struct br_mrp *mrp, u32 interval,
u8 max_miss, u32 period)
u8 max_miss, u32 period,
bool monitor)
{
struct switchdev_obj_ring_test_mrp test = {
.obj.orig_dev = br->dev,
@@ -74,6 +75,7 @@ int br_mrp_switchdev_send_ring_test(struct net_bridge *br,
.max_miss = max_miss,
.ring_id = mrp->ring_id,
.period = period,
.monitor = monitor,
};
int err;