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Subject[PATCH net-next v2 2/3] bridge: mrp: Set the priority of MRP instance
Date
Each MRP instance has a priority, a lower value means a higher priority.
The priority of MRP instance is stored in MRP_Test frame in this way
all the MRP nodes in the ring can see other nodes priority.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
include/net/switchdev.h | 1 +
include/uapi/linux/if_bridge.h | 2 ++
net/bridge/br_mrp.c | 3 ++-
net/bridge/br_mrp_netlink.c | 5 +++++
net/bridge/br_mrp_switchdev.c | 1 +
net/bridge/br_private_mrp.h | 1 +
6 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index db519957e134b..f82ef4c45f5ed 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -116,6 +116,7 @@ struct switchdev_obj_mrp {
struct net_device *p_port;
struct net_device *s_port;
u32 ring_id;
+ u16 prio;
};

#define SWITCHDEV_OBJ_MRP(OBJ) \
diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 5a43eb86c93bf..0162c1370ecb6 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -176,6 +176,7 @@ enum {
IFLA_BRIDGE_MRP_INSTANCE_RING_ID,
IFLA_BRIDGE_MRP_INSTANCE_P_IFINDEX,
IFLA_BRIDGE_MRP_INSTANCE_S_IFINDEX,
+ IFLA_BRIDGE_MRP_INSTANCE_PRIO,
__IFLA_BRIDGE_MRP_INSTANCE_MAX,
};

@@ -230,6 +231,7 @@ struct br_mrp_instance {
__u32 ring_id;
__u32 p_ifindex;
__u32 s_ifindex;
+ __u16 prio;
};

struct br_mrp_ring_state {
diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c
index 8ea59504ef47a..f8fd037219fe9 100644
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c
@@ -147,7 +147,7 @@ static struct sk_buff *br_mrp_alloc_test_skb(struct br_mrp *mrp,
br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_RING_TEST, sizeof(*hdr));
hdr = skb_put(skb, sizeof(*hdr));

- hdr->prio = cpu_to_be16(MRP_DEFAULT_PRIO);
+ hdr->prio = cpu_to_be16(mrp->prio);
ether_addr_copy(hdr->sa, p->br->dev->dev_addr);
hdr->port_role = cpu_to_be16(port_role);
hdr->state = cpu_to_be16(mrp->ring_state);
@@ -290,6 +290,7 @@ int br_mrp_add(struct net_bridge *br, struct br_mrp_instance *instance)
return -ENOMEM;

mrp->ring_id = instance->ring_id;
+ mrp->prio = instance->prio;

p = br_mrp_get_port(br, instance->p_ifindex);
spin_lock_bh(&br->lock);
diff --git a/net/bridge/br_mrp_netlink.c b/net/bridge/br_mrp_netlink.c
index d9de780d2ce06..8cb67d9ca44e0 100644
--- a/net/bridge/br_mrp_netlink.c
+++ b/net/bridge/br_mrp_netlink.c
@@ -22,6 +22,7 @@ br_mrp_instance_policy[IFLA_BRIDGE_MRP_INSTANCE_MAX + 1] = {
[IFLA_BRIDGE_MRP_INSTANCE_RING_ID] = { .type = NLA_U32 },
[IFLA_BRIDGE_MRP_INSTANCE_P_IFINDEX] = { .type = NLA_U32 },
[IFLA_BRIDGE_MRP_INSTANCE_S_IFINDEX] = { .type = NLA_U32 },
+ [IFLA_BRIDGE_MRP_INSTANCE_PRIO] = { .type = NLA_U16 },
};

static int br_mrp_instance_parse(struct net_bridge *br, struct nlattr *attr,
@@ -49,6 +50,10 @@ static int br_mrp_instance_parse(struct net_bridge *br, struct nlattr *attr,
inst.ring_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_INSTANCE_RING_ID]);
inst.p_ifindex = nla_get_u32(tb[IFLA_BRIDGE_MRP_INSTANCE_P_IFINDEX]);
inst.s_ifindex = nla_get_u32(tb[IFLA_BRIDGE_MRP_INSTANCE_S_IFINDEX]);
+ inst.prio = MRP_DEFAULT_PRIO;
+
+ if (tb[IFLA_BRIDGE_MRP_INSTANCE_PRIO])
+ inst.prio = nla_get_u16(tb[IFLA_BRIDGE_MRP_INSTANCE_PRIO]);

if (cmd == RTM_SETLINK)
return br_mrp_add(br, &inst);
diff --git a/net/bridge/br_mrp_switchdev.c b/net/bridge/br_mrp_switchdev.c
index 51cb1d5a24b4f..3a776043bf80d 100644
--- a/net/bridge/br_mrp_switchdev.c
+++ b/net/bridge/br_mrp_switchdev.c
@@ -12,6 +12,7 @@ int br_mrp_switchdev_add(struct net_bridge *br, struct br_mrp *mrp)
.p_port = rtnl_dereference(mrp->p_port)->dev,
.s_port = rtnl_dereference(mrp->s_port)->dev,
.ring_id = mrp->ring_id,
+ .prio = mrp->prio,
};
int err;

diff --git a/net/bridge/br_private_mrp.h b/net/bridge/br_private_mrp.h
index a0f53cc3ab85c..558941ce23669 100644
--- a/net/bridge/br_private_mrp.h
+++ b/net/bridge/br_private_mrp.h
@@ -14,6 +14,7 @@ struct br_mrp {
struct net_bridge_port __rcu *s_port;

u32 ring_id;
+ u16 prio;

enum br_mrp_ring_role_type ring_role;
u8 ring_role_offloaded;
--
2.26.2
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