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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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6
net/bridge/br_mrp_netlink.c
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@@ -196,6 +196,7 @@ br_mrp_start_test_policy[IFLA_BRIDGE_MRP_START_TEST_MAX + 1] = {
[IFLA_BRIDGE_MRP_START_TEST_INTERVAL] = { .type = NLA_U32 },
[IFLA_BRIDGE_MRP_START_TEST_MAX_MISS] = { .type = NLA_U32 },
[IFLA_BRIDGE_MRP_START_TEST_PERIOD] = { .type = NLA_U32 },
[IFLA_BRIDGE_MRP_START_TEST_MONITOR] = { .type = NLA_U32 },
};
static int br_mrp_start_test_parse(struct net_bridge *br, struct nlattr *attr,
@@ -225,6 +226,11 @@ static int br_mrp_start_test_parse(struct net_bridge *br, struct nlattr *attr,
test.interval = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_TEST_INTERVAL]);
test.max_miss = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_TEST_MAX_MISS]);
test.period = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_TEST_PERIOD]);
test.monitor = false;
if (tb[IFLA_BRIDGE_MRP_START_TEST_MONITOR])
test.monitor =
nla_get_u32(tb[IFLA_BRIDGE_MRP_START_TEST_MONITOR]);
return br_mrp_start_test(br, &test);
}