[PATCH net-next 09/10] mctp: Set route MTU via netlink
From: Matt Johnston <matt@codeconstruct.com.au>
Date: 2021-09-29 07:27:09
Subsystem:
management component transport protocol (mctp), networking [general], the rest · Maintainers:
Jeremy Kerr, Matt Johnston, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
A route's RTAX_MTU can be set in nested RTAX_METRICS Signed-off-by: Matt Johnston <matt@codeconstruct.com.au> --- net/mctp/route.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
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;
--
2.30.2