[RFC,net-next,v3,04/10] net: bridge: mrp: Add generic netlink interface to configure MRP
diff mbox series

Message ID 20200124161828.12206-5-horatiu.vultur@microchip.com
State RFC
Delegated to: David Miller
Headers show
Series
  • net: bridge: mrp: Add support for Media Redundancy Protocol (MRP)
Related show

Commit Message

Horatiu Vultur Jan. 24, 2020, 4:18 p.m. UTC
Implement the generic netlink interface to configure MRP. The implementation
will do sanity checks over the attributes and then eventually call the MRP
interface which eventually will call the switchdev API.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 net/bridge/br_mrp_netlink.c | 655 ++++++++++++++++++++++++++++++++++++
 1 file changed, 655 insertions(+)
 create mode 100644 net/bridge/br_mrp_netlink.c

Comments

Andrew Lunn Jan. 25, 2020, 3:34 p.m. UTC | #1
On Fri, Jan 24, 2020 at 05:18:22PM +0100, Horatiu Vultur wrote:
> Implement the generic netlink interface to configure MRP. The implementation
> will do sanity checks over the attributes and then eventually call the MRP
> interface which eventually will call the switchdev API.

Hi Horatiu

What was your thinking between adding a new generic netlink interface,
and extending the current one?

I've not looked at your user space code yet, but i assume it has to
make use of both? It needs to create the bridge and add the
interfaces. And then it needs to control the MRP state.

Allan mentioned you might get around to implementing 802.1CB? Would
that be another generic netlink interface, or would you extend the MRP
interface?

Thanks
	Andrew
Allan W. Nielsen Jan. 25, 2020, 7:28 p.m. UTC | #2
On 25.01.2020 16:34, Andrew Lunn wrote:
>EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
>On Fri, Jan 24, 2020 at 05:18:22PM +0100, Horatiu Vultur wrote:
>> Implement the generic netlink interface to configure MRP. The implementation
>> will do sanity checks over the attributes and then eventually call the MRP
>> interface which eventually will call the switchdev API.
>What was your thinking between adding a new generic netlink interface,
>and extending the current one?
>
>I've not looked at your user space code yet, but i assume it has to
>make use of both? It needs to create the bridge and add the
>interfaces. And then it needs to control the MRP state.
>
>Allan mentioned you might get around to implementing 802.1CB? Would
>that be another generic netlink interface, or would you extend the MRP
>interface?
Horatiu, if you have given this any thoughts, then please share them.

Here are my thoughts on 802.1CB: If we look at this with the traditional
NIC/host POW, then it would be natural to look at the HSR interface as
Vinicius suggested, and expose it as a new interface (HSR0). But when
looking at how 802.1CB say a bridge should act, and also what the
capabilities of the HW are, then it seem more natural to extend the TC
system. In HW it is a TCAM classifying the traffic, and it has some
actions to either replicate the matched frames, or eliminate the
additional copies.

The HW also supports CFM (see [1]), which we need (partly) to complete
the MRP implementation with MIM/MIC roles. This is also useful for none
MRP users (like ERPS).

This seems like an argument for moving this to the existing netlink
interfaces instead of having it as a generic netlink.

[1] https://en.wikipedia.org/wiki/IEEE_802.1ag

/Allan
Horatiu Vultur Jan. 26, 2020, 1:39 p.m. UTC | #3
Hi,
The 01/25/2020 20:28, Allan W. Nielsen wrote:
> On 25.01.2020 16:34, Andrew Lunn wrote:
> > On Fri, Jan 24, 2020 at 05:18:22PM +0100, Horatiu Vultur wrote:
> > > Implement the generic netlink interface to configure MRP. The implementation
> > > will do sanity checks over the attributes and then eventually call the MRP
> > > interface which eventually will call the switchdev API.
> > What was your thinking between adding a new generic netlink interface,
> > and extending the current one?
I thought is more clear to see which commands are used to configure MRP
by adding a new generic netlink than extending the existing one.

> > 
> > I've not looked at your user space code yet, but i assume it has to
> > make use of both? It needs to create the bridge and add the
> > interfaces. And then it needs to control the MRP state.
Actually the userspace application doesn't create the bridge and add the
interfaces. It expects that user does this using iproute2 or other
commands.
And once the bridge and interfaces are added then it would just
configure the bridge.

> > 
> > Allan mentioned you might get around to implementing 802.1CB? Would
> > that be another generic netlink interface, or would you extend the MRP
> > interface?
> Horatiu, if you have given this any thoughts, then please share them.
I have not look yet over this, I will try to have a look ASAP.

> 
> Here are my thoughts on 802.1CB: If we look at this with the traditional
> NIC/host POW, then it would be natural to look at the HSR interface as
> Vinicius suggested, and expose it as a new interface (HSR0). But when
> looking at how 802.1CB say a bridge should act, and also what the
> capabilities of the HW are, then it seem more natural to extend the TC
> system. In HW it is a TCAM classifying the traffic, and it has some
> actions to either replicate the matched frames, or eliminate the
> additional copies.
> 
> The HW also supports CFM (see [1]), which we need (partly) to complete
> the MRP implementation with MIM/MIC roles. This is also useful for none
> MRP users (like ERPS).
> 
> This seems like an argument for moving this to the existing netlink
> interfaces instead of having it as a generic netlink.
> 
> [1] https://en.wikipedia.org/wiki/IEEE_802.1ag
> 
> /Allan

Patch
diff mbox series

diff --git a/net/bridge/br_mrp_netlink.c b/net/bridge/br_mrp_netlink.c
new file mode 100644
index 000000000000..cb676387e89b
--- /dev/null
+++ b/net/bridge/br_mrp_netlink.c
@@ -0,0 +1,655 @@ 
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <net/genetlink.h>
+
+#include <uapi/linux/mrp_bridge.h>
+#include "br_private.h"
+#include "br_private_mrp.h"
+
+static struct genl_family br_mrp_genl_family;
+
+static struct nla_policy br_mrp_genl_policy[BR_MRP_ATTR_END] = {
+	[BR_MRP_ATTR_NONE] = { .type = NLA_UNSPEC },
+	[BR_MRP_ATTR_BR_IFINDEX] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_PORT_IFINDEX] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_RING_NR] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_RING_ROLE] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_RING_STATE] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_PORT_STATE] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_PORT_ROLE] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_TEST_INTERVAL] = { .type = NLA_U32 },
+	[BR_MRP_ATTR_TEST_MAX_MISS] = { .type = NLA_U8 },
+	[BR_MRP_ATTR_RING_OPEN] = { .type = NLA_U8 },
+};
+
+enum br_mrp_multicast_groups {
+	BR_MRP_MCGRP_OPEN,
+};
+
+static const struct genl_multicast_group br_mrp_mcgrps[] = {
+	[BR_MRP_MCGRP_OPEN] = { .name = "open", },
+};
+
+static int br_mrp_genl_add(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev_br;
+	struct net_bridge *br;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	err = br_mrp_add(br, nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]));
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_add_port(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev_br, *dev;
+	struct net_bridge_port *port;
+	struct net_bridge *br;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_PORT_IFINDEX]) {
+		pr_err("ATTR_PORT_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	dev = __dev_get_by_index(net,
+				 nla_get_u32(info->attrs[BR_MRP_ATTR_PORT_IFINDEX]));
+	if (!dev) {
+		pr_err("Invalid ATTR_PORT_IFIINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
+		pr_err("ATTR_PORT_IFINDEX is not a bridge port");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	port = br_port_get_rtnl(dev);
+	if (port->br != br) {
+		pr_err("Port is not under the bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	err = br_mrp_add_port(br, nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]),
+			      port);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_del(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev_br;
+	struct net_bridge *br;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	err = br_mrp_del(br, nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]));
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_del_port(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_bridge_port *port;
+	struct net_device *dev;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_PORT_IFINDEX]) {
+		pr_err("ATTR_PORT_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev = __dev_get_by_index(net,
+				 nla_get_u32(info->attrs[BR_MRP_ATTR_PORT_IFINDEX]));
+	if (!dev) {
+		pr_err("Invalid ATTR_PORT_IFIINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
+		pr_err("ATTR_PORT_IFINDEX is not a bridge port");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	port = br_port_get_rtnl(dev);
+
+	err = br_mrp_del_port(port);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_set_port_state(struct sk_buff *skb,
+				      struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	enum br_mrp_port_state_type state;
+	struct net_bridge_port *port;
+	struct net_device *dev;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_PORT_IFINDEX]) {
+		pr_err("ATTR_PORT_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_PORT_STATE]) {
+		pr_err("ATTR_PORT_STATE is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev = __dev_get_by_index(net,
+				 nla_get_u32(info->attrs[BR_MRP_ATTR_PORT_IFINDEX]));
+	if (!dev) {
+		pr_err("Invalid ATTR_PORT_IFIINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
+		pr_err("ATTR_PORT_IFINDEX is not a bridge port");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	port = br_port_get_rtnl(dev);
+	state = nla_get_u32(info->attrs[BR_MRP_ATTR_PORT_STATE]);
+
+	err = br_mrp_set_port_state(port, state);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_set_port_role(struct sk_buff *skb,
+				     struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	enum br_mrp_port_role_type role;
+	struct net_bridge_port *port;
+	struct net_device *dev;
+	u32 ring_nr;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_PORT_IFINDEX]) {
+		pr_err("ATTR_PORT_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_PORT_ROLE]) {
+		pr_err("ATTR_PORT_STATE is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev = __dev_get_by_index(net,
+				 nla_get_u32(info->attrs[BR_MRP_ATTR_PORT_IFINDEX]));
+	if (!dev) {
+		pr_err("Invalid ATTR_PORT_IFIINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev->priv_flags & IFF_BRIDGE_PORT)) {
+		pr_err("ATTR_PORT_IFINDEX is not a bridge port");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	port = br_port_get_rtnl(dev);
+	role = nla_get_u32(info->attrs[BR_MRP_ATTR_PORT_ROLE]);
+	ring_nr = nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]);
+
+	err = br_mrp_set_port_role(port, ring_nr, role);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_set_ring_state(struct sk_buff *skb,
+				      struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	enum br_mrp_ring_state_type state;
+	struct net_device *dev_br;
+	struct net_bridge *br;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_STATE]) {
+		pr_err("ATTR_RING_STATE is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	state = nla_get_u32(info->attrs[BR_MRP_ATTR_RING_STATE]);
+
+	err = br_mrp_set_ring_state(br,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]),
+				    state);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_set_ring_role(struct sk_buff *skb,
+				     struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	enum br_mrp_ring_role_type role;
+	struct net_device *dev_br;
+	struct net_bridge *br;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_ROLE]) {
+		pr_err("ATTR_RING_ROLE is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	role = nla_get_u32(info->attrs[BR_MRP_ATTR_RING_ROLE]);
+
+	err = br_mrp_set_ring_role(br,
+				   nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]),
+				   role);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_start_test(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev_br;
+	struct net_bridge *br;
+	u32 interval;
+	int err = 0;
+	u8 max_miss;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_TEST_INTERVAL]) {
+		pr_err("ATTR_TEST_INTERVAL is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_TEST_MAX_MISS]) {
+		pr_err("ATTR_TEST_MAX_MISS is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	interval = nla_get_u32(info->attrs[BR_MRP_ATTR_TEST_INTERVAL]);
+	max_miss = nla_get_u8(info->attrs[BR_MRP_ATTR_TEST_MAX_MISS]);
+
+	err = br_mrp_start_test(br, nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]),
+				interval, max_miss);
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+static int br_mrp_genl_flush(struct sk_buff *skb, struct genl_info *info)
+{
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev_br;
+	struct net_bridge *br;
+	int err = 0;
+
+	if (!info->attrs[BR_MRP_ATTR_BR_IFINDEX]) {
+		pr_err("ATTR_BR_IFINDEX is missing\n");
+		return -EINVAL;
+	}
+
+	if (!info->attrs[BR_MRP_ATTR_RING_NR]) {
+		pr_err("ATTR_RING_NR is missing\n");
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	dev_br = __dev_get_by_index(net,
+				    nla_get_u32(info->attrs[BR_MRP_ATTR_BR_IFINDEX]));
+	if (!dev_br) {
+		pr_err("Invalid ATTR_BR_IFINDEX\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+
+	if (!(dev_br->priv_flags & IFF_EBRIDGE)) {
+		pr_err("Port is not a bridge\n");
+		err = -EINVAL;
+		goto invalid_info;
+	}
+	br = netdev_priv(dev_br);
+
+	err = br_mrp_flush(br, nla_get_u32(info->attrs[BR_MRP_ATTR_RING_NR]));
+
+invalid_info:
+	rtnl_unlock();
+
+	return err;
+}
+
+void br_mrp_port_open(struct net_device *dev, u8 loc)
+{
+	struct sk_buff *msg;
+	void *hdr;
+
+	msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+	if (!msg) {
+		pr_err("Allocate netlink msg failed\n");
+		return;
+	}
+
+	hdr = genlmsg_put(msg, 0, 0, &br_mrp_genl_family, 0,
+			  BR_MRP_GENL_RING_OPEN);
+	if (!hdr) {
+		pr_err("Create msg hdr failed \n");
+		goto err_msg_free;
+	}
+
+	if (nla_put_u32(msg, BR_MRP_ATTR_PORT_IFINDEX, dev->ifindex) ||
+	    nla_put_u8(msg, BR_MRP_ATTR_RING_OPEN, loc)) {
+		pr_err("Failed nla_put\n");
+		goto nla_put_failure;
+	}
+
+	genlmsg_end(msg, hdr);
+
+	genlmsg_multicast(&br_mrp_genl_family, msg, 0, 0, GFP_ATOMIC);
+	return;
+
+nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+
+err_msg_free:
+	nlmsg_free(msg);
+}
+EXPORT_SYMBOL(br_mrp_port_open);
+
+static struct genl_ops br_mrp_genl_ops[] = {
+	{
+		.cmd    = BR_MRP_GENL_ADD,
+		.doit   = br_mrp_genl_add,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_ADD_PORT,
+		.doit   = br_mrp_genl_add_port,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_DEL,
+		.doit   = br_mrp_genl_del,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_DEL_PORT,
+		.doit   = br_mrp_genl_del_port,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_SET_PORT_STATE,
+		.doit   = br_mrp_genl_set_port_state,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_SET_PORT_ROLE,
+		.doit   = br_mrp_genl_set_port_role,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_SET_RING_STATE,
+		.doit   = br_mrp_genl_set_ring_state,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_SET_RING_ROLE,
+		.doit   = br_mrp_genl_set_ring_role,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_START_TEST,
+		.doit   = br_mrp_genl_start_test,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd    = BR_MRP_GENL_FLUSH,
+		.doit   = br_mrp_genl_flush,
+		.validate = GENL_DONT_VALIDATE_STRICT,
+		.flags  = GENL_ADMIN_PERM,
+	},
+};
+
+static struct genl_family br_mrp_genl_family = {
+	.name		= "br_mrp_netlink",
+	.hdrsize	= 0,
+	.version	= 1,
+	.maxattr	= BR_MRP_ATTR_MAX,
+	.policy		= br_mrp_genl_policy,
+	.ops		= br_mrp_genl_ops,
+	.n_ops		= ARRAY_SIZE(br_mrp_genl_ops),
+	.mcgrps		= br_mrp_mcgrps,
+	.n_mcgrps	= ARRAY_SIZE(br_mrp_mcgrps),
+};
+
+int br_mrp_netlink_init(void)
+{
+	int err;
+
+	err = genl_register_family(&br_mrp_genl_family);
+	if (err)
+		pr_err("genl_register_family failed\n");
+
+	return err;
+}
+
+void br_mrp_netlink_uninit(void)
+{
+	genl_unregister_family(&br_mrp_genl_family);
+}