net/bridge/br_mrp_netlink.c

Source file repositories/reference/linux-study-clean/net/bridge/br_mrp_netlink.c

File Facts

System
Linux kernel
Corpus path
net/bridge/br_mrp_netlink.c
Extension
.c
Size
16395 bytes
Lines
572
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: implementation source
Status
source implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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 const struct nla_policy br_mrp_policy[IFLA_BRIDGE_MRP_MAX + 1] = {
	[IFLA_BRIDGE_MRP_UNSPEC]	= { .type = NLA_REJECT },
	[IFLA_BRIDGE_MRP_INSTANCE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_PORT_STATE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_PORT_ROLE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_RING_STATE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_RING_ROLE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_START_TEST]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_IN_ROLE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_IN_STATE]	= { .type = NLA_NESTED },
	[IFLA_BRIDGE_MRP_START_IN_TEST]	= { .type = NLA_NESTED },
};

static const struct nla_policy
br_mrp_instance_policy[IFLA_BRIDGE_MRP_INSTANCE_MAX + 1] = {
	[IFLA_BRIDGE_MRP_INSTANCE_UNSPEC]	= { .type = NLA_REJECT },
	[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,
				 int cmd, struct netlink_ext_ack *extack)
{
	struct nlattr *tb[IFLA_BRIDGE_MRP_INSTANCE_MAX + 1];
	struct br_mrp_instance inst;
	int err;

	err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_INSTANCE_MAX, attr,
			       br_mrp_instance_policy, extack);
	if (err)
		return err;

	if (!tb[IFLA_BRIDGE_MRP_INSTANCE_RING_ID] ||
	    !tb[IFLA_BRIDGE_MRP_INSTANCE_P_IFINDEX] ||
	    !tb[IFLA_BRIDGE_MRP_INSTANCE_S_IFINDEX]) {
		NL_SET_ERR_MSG_MOD(extack,
				   "Missing attribute: RING_ID or P_IFINDEX or S_IFINDEX");
		return -EINVAL;
	}

	memset(&inst, 0, sizeof(inst));

	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);
	else
		return br_mrp_del(br, &inst);

	return 0;
}

static const struct nla_policy
br_mrp_port_state_policy[IFLA_BRIDGE_MRP_PORT_STATE_MAX + 1] = {
	[IFLA_BRIDGE_MRP_PORT_STATE_UNSPEC]	= { .type = NLA_REJECT },
	[IFLA_BRIDGE_MRP_PORT_STATE_STATE]	= { .type = NLA_U32 },
};

static int br_mrp_port_state_parse(struct net_bridge_port *p,
				   struct nlattr *attr,
				   struct netlink_ext_ack *extack)
{
	struct nlattr *tb[IFLA_BRIDGE_MRP_PORT_STATE_MAX + 1];
	enum br_mrp_port_state_type state;
	int err;

	err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_PORT_STATE_MAX, attr,
			       br_mrp_port_state_policy, extack);
	if (err)
		return err;

	if (!tb[IFLA_BRIDGE_MRP_PORT_STATE_STATE]) {
		NL_SET_ERR_MSG_MOD(extack, "Missing attribute: STATE");
		return -EINVAL;

Annotation

Implementation Notes