diff mbox series

[net-next,09/10] mctp: Set route MTU via netlink

Message ID 20210929072614.854015-10-matt@codeconstruct.com.au (mailing list archive)
State Accepted
Commit 6183569db80eedc648b584a658e6b898d43650cb
Delegated to: Netdev Maintainers
Headers show
Series Updates to MCTP core | expand

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netdev/cover_letter success Link
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netdev/tree_selection success Clearly marked for net-next
netdev/subject_prefix success Link
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Link
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 31 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
netdev/header_inline success Link

Commit Message

Matt Johnston Sept. 29, 2021, 7:26 a.m. UTC
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 mbox series

Patch

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;