Quelle  br_mrp_netlink.c   Sprache: C

// 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;
 }

 state = nla_get_u32(tb[IFLA_BRIDGE_MRP_PORT_STATE_STATE]);

 return br_mrp_set_port_state(p, state);
}

static const struct nla_policy
br_mrp_port_role_policy[IFLA_BRIDGE_MRP_PORT_ROLE_MAX + 1] = {
 [IFLA_BRIDGE_MRP_PORT_ROLE_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_PORT_ROLE_ROLE] = { .type = NLA_U32 },
};

static int br_mrp_port_role_parse(struct net_bridge_port *p,
      struct nlattr *attr,
      struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_PORT_ROLE_MAX + 1];
 enum br_mrp_port_role_type role;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_PORT_ROLE_MAX, attr,
          br_mrp_port_role_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_PORT_ROLE_ROLE]) {
  NL_SET_ERR_MSG_MOD(extack, "Missing attribute: ROLE");
  return -EINVAL;
 }

 role = nla_get_u32(tb[IFLA_BRIDGE_MRP_PORT_ROLE_ROLE]);

 return br_mrp_set_port_role(p, role);
}

static const struct nla_policy
br_mrp_ring_state_policy[IFLA_BRIDGE_MRP_RING_STATE_MAX + 1] = {
 [IFLA_BRIDGE_MRP_RING_STATE_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_RING_STATE_RING_ID] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_RING_STATE_STATE] = { .type = NLA_U32 },
};

static int br_mrp_ring_state_parse(struct net_bridge *br, struct nlattr *attr,
       struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_RING_STATE_MAX + 1];
 struct br_mrp_ring_state state;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_RING_STATE_MAX, attr,
          br_mrp_ring_state_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_RING_STATE_RING_ID] ||
     !tb[IFLA_BRIDGE_MRP_RING_STATE_STATE]) {
  NL_SET_ERR_MSG_MOD(extack,
       "Missing attribute: RING_ID or STATE");
  return -EINVAL;
 }

 memset(&state, 0x0, sizeof(state));

 state.ring_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_RING_STATE_RING_ID]);
 state.ring_state = nla_get_u32(tb[IFLA_BRIDGE_MRP_RING_STATE_STATE]);

 return br_mrp_set_ring_state(br, &state);
}

static const struct nla_policy
br_mrp_ring_role_policy[IFLA_BRIDGE_MRP_RING_ROLE_MAX + 1] = {
 [IFLA_BRIDGE_MRP_RING_ROLE_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_RING_ROLE_RING_ID] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_RING_ROLE_ROLE] = { .type = NLA_U32 },
};

static int br_mrp_ring_role_parse(struct net_bridge *br, struct nlattr *attr,
      struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_RING_ROLE_MAX + 1];
 struct br_mrp_ring_role role;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_RING_ROLE_MAX, attr,
          br_mrp_ring_role_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_RING_ROLE_RING_ID] ||
     !tb[IFLA_BRIDGE_MRP_RING_ROLE_ROLE]) {
  NL_SET_ERR_MSG_MOD(extack,
       "Missing attribute: RING_ID or ROLE");
  return -EINVAL;
 }

 memset(&role, 0x0, sizeof(role));

 role.ring_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_RING_ROLE_RING_ID]);
 role.ring_role = nla_get_u32(tb[IFLA_BRIDGE_MRP_RING_ROLE_ROLE]);

 return br_mrp_set_ring_role(br, &role);
}

static const struct nla_policy
br_mrp_start_test_policy[IFLA_BRIDGE_MRP_START_TEST_MAX + 1] = {
 [IFLA_BRIDGE_MRP_START_TEST_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_START_TEST_RING_ID] = { .type = NLA_U32 },
 [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,
       struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_START_TEST_MAX + 1];
 struct br_mrp_start_test test;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_START_TEST_MAX, attr,
          br_mrp_start_test_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_START_TEST_RING_ID] ||
     !tb[IFLA_BRIDGE_MRP_START_TEST_INTERVAL] ||
     !tb[IFLA_BRIDGE_MRP_START_TEST_MAX_MISS] ||
     !tb[IFLA_BRIDGE_MRP_START_TEST_PERIOD]) {
  NL_SET_ERR_MSG_MOD(extack,
       "Missing attribute: RING_ID or INTERVAL or MAX_MISS or PERIOD");
  return -EINVAL;
 }

 memset(&test, 0x0, sizeof(test));

 test.ring_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_TEST_RING_ID]);
 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);
}

static const struct nla_policy
br_mrp_in_state_policy[IFLA_BRIDGE_MRP_IN_STATE_MAX + 1] = {
 [IFLA_BRIDGE_MRP_IN_STATE_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_IN_STATE_IN_ID] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_IN_STATE_STATE] = { .type = NLA_U32 },
};

static int br_mrp_in_state_parse(struct net_bridge *br, struct nlattr *attr,
     struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_IN_STATE_MAX + 1];
 struct br_mrp_in_state state;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_IN_STATE_MAX, attr,
          br_mrp_in_state_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_IN_STATE_IN_ID] ||
     !tb[IFLA_BRIDGE_MRP_IN_STATE_STATE]) {
  NL_SET_ERR_MSG_MOD(extack,
       "Missing attribute: IN_ID or STATE");
  return -EINVAL;
 }

 memset(&state, 0x0, sizeof(state));

 state.in_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_IN_STATE_IN_ID]);
 state.in_state = nla_get_u32(tb[IFLA_BRIDGE_MRP_IN_STATE_STATE]);

 return br_mrp_set_in_state(br, &state);
}

static const struct nla_policy
br_mrp_in_role_policy[IFLA_BRIDGE_MRP_IN_ROLE_MAX + 1] = {
 [IFLA_BRIDGE_MRP_IN_ROLE_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_IN_ROLE_RING_ID] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_IN_ROLE_IN_ID]  = { .type = NLA_U16 },
 [IFLA_BRIDGE_MRP_IN_ROLE_ROLE]  = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX] = { .type = NLA_U32 },
};

static int br_mrp_in_role_parse(struct net_bridge *br, struct nlattr *attr,
    struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_IN_ROLE_MAX + 1];
 struct br_mrp_in_role role;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_IN_ROLE_MAX, attr,
          br_mrp_in_role_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_IN_ROLE_RING_ID] ||
     !tb[IFLA_BRIDGE_MRP_IN_ROLE_IN_ID] ||
     !tb[IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX] ||
     !tb[IFLA_BRIDGE_MRP_IN_ROLE_ROLE]) {
  NL_SET_ERR_MSG_MOD(extack,
       "Missing attribute: RING_ID or ROLE or IN_ID or I_IFINDEX");
  return -EINVAL;
 }

 memset(&role, 0x0, sizeof(role));

 role.ring_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_IN_ROLE_RING_ID]);
 role.in_id = nla_get_u16(tb[IFLA_BRIDGE_MRP_IN_ROLE_IN_ID]);
 role.i_ifindex = nla_get_u32(tb[IFLA_BRIDGE_MRP_IN_ROLE_I_IFINDEX]);
 role.in_role = nla_get_u32(tb[IFLA_BRIDGE_MRP_IN_ROLE_ROLE]);

 return br_mrp_set_in_role(br, &role);
}

static const struct nla_policy
br_mrp_start_in_test_policy[IFLA_BRIDGE_MRP_START_IN_TEST_MAX + 1] = {
 [IFLA_BRIDGE_MRP_START_IN_TEST_UNSPEC] = { .type = NLA_REJECT },
 [IFLA_BRIDGE_MRP_START_IN_TEST_IN_ID] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_START_IN_TEST_MAX_MISS] = { .type = NLA_U32 },
 [IFLA_BRIDGE_MRP_START_IN_TEST_PERIOD] = { .type = NLA_U32 },
};

static int br_mrp_start_in_test_parse(struct net_bridge *br,
          struct nlattr *attr,
          struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_START_IN_TEST_MAX + 1];
 struct br_mrp_start_in_test test;
 int err;

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_START_IN_TEST_MAX, attr,
          br_mrp_start_in_test_policy, extack);
 if (err)
  return err;

 if (!tb[IFLA_BRIDGE_MRP_START_IN_TEST_IN_ID] ||
     !tb[IFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL] ||
     !tb[IFLA_BRIDGE_MRP_START_IN_TEST_MAX_MISS] ||
     !tb[IFLA_BRIDGE_MRP_START_IN_TEST_PERIOD]) {
  NL_SET_ERR_MSG_MOD(extack,
       "Missing attribute: RING_ID or INTERVAL or MAX_MISS or PERIOD");
  return -EINVAL;
 }

 memset(&test, 0x0, sizeof(test));

 test.in_id = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_IN_TEST_IN_ID]);
 test.interval = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_IN_TEST_INTERVAL]);
 test.max_miss = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_IN_TEST_MAX_MISS]);
 test.period = nla_get_u32(tb[IFLA_BRIDGE_MRP_START_IN_TEST_PERIOD]);

 return br_mrp_start_in_test(br, &test);
}

int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
   struct nlattr *attr, int cmd, struct netlink_ext_ack *extack)
{
 struct nlattr *tb[IFLA_BRIDGE_MRP_MAX + 1];
 int err;

 /* When this function is called for a port then the br pointer is
 * invalid, therefor set the br to point correctly
 */
 if (p)
  br = p->br;

 if (br->stp_enabled != BR_NO_STP) {
  NL_SET_ERR_MSG_MOD(extack, "MRP can't be enabled if STP is already enabled");
  return -EINVAL;
 }

 err = nla_parse_nested(tb, IFLA_BRIDGE_MRP_MAX, attr,
          br_mrp_policy, extack);
 if (err)
  return err;

 if (tb[IFLA_BRIDGE_MRP_INSTANCE]) {
  err = br_mrp_instance_parse(br, tb[IFLA_BRIDGE_MRP_INSTANCE],
         cmd, extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_PORT_STATE]) {
  err = br_mrp_port_state_parse(p, tb[IFLA_BRIDGE_MRP_PORT_STATE],
           extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_PORT_ROLE]) {
  err = br_mrp_port_role_parse(p, tb[IFLA_BRIDGE_MRP_PORT_ROLE],
          extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_RING_STATE]) {
  err = br_mrp_ring_state_parse(br,
           tb[IFLA_BRIDGE_MRP_RING_STATE],
           extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_RING_ROLE]) {
  err = br_mrp_ring_role_parse(br, tb[IFLA_BRIDGE_MRP_RING_ROLE],
          extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_START_TEST]) {
  err = br_mrp_start_test_parse(br,
           tb[IFLA_BRIDGE_MRP_START_TEST],
           extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_IN_STATE]) {
  err = br_mrp_in_state_parse(br, tb[IFLA_BRIDGE_MRP_IN_STATE],
         extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_IN_ROLE]) {
  err = br_mrp_in_role_parse(br, tb[IFLA_BRIDGE_MRP_IN_ROLE],
        extack);
  if (err)
   return err;
 }

 if (tb[IFLA_BRIDGE_MRP_START_IN_TEST]) {
  err = br_mrp_start_in_test_parse(br,
       tb[IFLA_BRIDGE_MRP_START_IN_TEST],
       extack);
  if (err)
   return err;
 }

 return 0;
}

int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
{
 struct nlattr *tb, *mrp_tb;
 struct br_mrp *mrp;

 mrp_tb = nla_nest_start_noflag(skb, IFLA_BRIDGE_MRP);
 if (!mrp_tb)
  return -EMSGSIZE;

 hlist_for_each_entry_rcu(mrp, &br->mrp_list, list) {
  struct net_bridge_port *p;

  tb = nla_nest_start_noflag(skb, IFLA_BRIDGE_MRP_INFO);
  if (!tb)
   goto nla_info_failure;

  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_RING_ID,
    mrp->ring_id))
   goto nla_put_failure;

  p = rcu_dereference(mrp->p_port);
  if (p && nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_P_IFINDEX,
         p->dev->ifindex))
   goto nla_put_failure;

  p = rcu_dereference(mrp->s_port);
  if (p && nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_S_IFINDEX,
         p->dev->ifindex))
   goto nla_put_failure;

  p = rcu_dereference(mrp->i_port);
  if (p && nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_I_IFINDEX,
         p->dev->ifindex))
   goto nla_put_failure;

  if (nla_put_u16(skb, IFLA_BRIDGE_MRP_INFO_PRIO,
    mrp->prio))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_RING_STATE,
    mrp->ring_state))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_RING_ROLE,
    mrp->ring_role))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_TEST_INTERVAL,
    mrp->test_interval))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_TEST_MAX_MISS,
    mrp->test_max_miss))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_TEST_MONITOR,
    mrp->test_monitor))
   goto nla_put_failure;

  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_IN_STATE,
    mrp->in_state))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_IN_ROLE,
    mrp->in_role))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_IN_TEST_INTERVAL,
    mrp->in_test_interval))
   goto nla_put_failure;
  if (nla_put_u32(skb, IFLA_BRIDGE_MRP_INFO_IN_TEST_MAX_MISS,
    mrp->in_test_max_miss))
   goto nla_put_failure;

  nla_nest_end(skb, tb);
 }
 nla_nest_end(skb, mrp_tb);

 return 0;

nla_put_failure:
 nla_nest_cancel(skb, tb);

nla_info_failure:
 nla_nest_cancel(skb, mrp_tb);

 return -EMSGSIZE;
}

int br_mrp_ring_port_open(struct net_device *dev, u8 loc)
{
 struct net_bridge_port *p;
 int err = 0;

 p = br_port_get_rcu(dev);
 if (!p) {
  err = -EINVAL;
  goto out;
 }

 if (loc)
  p->flags |= BR_MRP_LOST_CONT;
 else
  p->flags &= ~BR_MRP_LOST_CONT;

 br_ifinfo_notify(RTM_NEWLINK, NULL, p);

out:
 return err;
}

int br_mrp_in_port_open(struct net_device *dev, u8 loc)
{
 struct net_bridge_port *p;
 int err = 0;

 p = br_port_get_rcu(dev);
 if (!p) {
  err = -EINVAL;
  goto out;
 }

 if (loc)
  p->flags |= BR_MRP_LOST_IN_CONT;
 else
  p->flags &= ~BR_MRP_LOST_IN_CONT;

 br_ifinfo_notify(RTM_NEWLINK, NULL, p);

out:
 return err;
}