From 6183569db80eedc648b584a658e6b898d43650cb Mon Sep 17 00:00:00 2001 From: Matt Johnston Date: Wed, 29 Sep 2021 15:26:13 +0800 Subject: mctp: Set route MTU via netlink A route's RTAX_MTU can be set in nested RTAX_METRICS Signed-off-by: Matt Johnston Signed-off-by: David S. Miller --- net/mctp/route.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'net/mctp') diff --git a/net/mctp/route.c b/net/mctp/route.c index acc5bb39e16d..e20f3096d067 100644 --- a/net/mctp/route.c +++ b/net/mctp/route.c @@ -1026,10 +1026,15 @@ static int mctp_route_nlparse(struct sk_buff *skb, struct nlmsghdr *nlh, return 0; } +static const struct nla_policy rta_metrics_policy[RTAX_MAX + 1] = { + [RTAX_MTU] = { .type = NLA_U32 }, +}; + static int mctp_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, struct netlink_ext_ack *extack) { struct nlattr *tb[RTA_MAX + 1]; + struct nlattr *tbx[RTAX_MAX + 1]; mctp_eid_t daddr_start; struct mctp_dev *mdev; struct rtmsg *rtm; @@ -1046,8 +1051,15 @@ static int mctp_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, return -EINVAL; } - /* TODO: parse mtu from nlparse */ mtu = 0; + if (tb[RTA_METRICS]) { + rc = nla_parse_nested(tbx, RTAX_MAX, tb[RTA_METRICS], + rta_metrics_policy, NULL); + if (rc < 0) + return rc; + if (tbx[RTAX_MTU]) + mtu = nla_get_u32(tbx[RTAX_MTU]); + } if (rtm->rtm_type != RTN_UNICAST) return -EINVAL; -- cgit