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net: report min and max mtu network device settings
Report the minimum and maximum MTU allowed on a device via netlink so that it can be displayed by tools like ip link. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -164,6 +164,8 @@ enum {
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IFLA_CARRIER_UP_COUNT,
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IFLA_CARRIER_DOWN_COUNT,
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IFLA_NEW_IFINDEX,
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IFLA_MIN_MTU,
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IFLA_MAX_MTU,
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__IFLA_MAX
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};
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@ -1015,6 +1015,8 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
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+ nla_total_size(4) /* IFLA_IF_NETNSID */
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+ nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
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+ nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
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+ nla_total_size(4) /* IFLA_MIN_MTU */
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+ nla_total_size(4) /* IFLA_MAX_MTU */
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+ 0;
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}
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@ -1601,6 +1603,8 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb,
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netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
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nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
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nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
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nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
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nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
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nla_put_u32(skb, IFLA_GROUP, dev->group) ||
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nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
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nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
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@ -1732,6 +1736,8 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
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[IFLA_IF_NETNSID] = { .type = NLA_S32 },
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[IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
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[IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
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[IFLA_MIN_MTU] = { .type = NLA_U32 },
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[IFLA_MAX_MTU] = { .type = NLA_U32 },
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};
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static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
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