Commit 8265abc0 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
Browse files

[IPV4]: Fix nexthop realm dumping for multipath routes 



Routing realms exist per nexthop, but are only returned to userspace
for the first nexthop. This is due to the fact that iproute2 only
allows to set the realm for the first nexthop and the kernel refuses
multipath routes where only a single realm is present.

Dump all realms for multipath routes to enable iproute to correctly
display them.

Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9ed36279

net/ipv4/fib_semantics.c

+8 −4
Original line number Diff line number Diff line
@@ -961,10 +961,6 @@ fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, 
	rtm->rtm_protocol = fi->fib_protocol;

	if (fi->fib_priority)

		RTA_PUT(skb, RTA_PRIORITY, 4, &fi->fib_priority);

#ifdef CONFIG_NET_CLS_ROUTE

	if (fi->fib_nh[0].nh_tclassid)

		RTA_PUT(skb, RTA_FLOW, 4, &fi->fib_nh[0].nh_tclassid);

#endif

	if (rtnetlink_put_metrics(skb, fi->fib_metrics) < 0)

		goto rtattr_failure;

	if (fi->fib_prefsrc)
@@ -974,6 +970,10 @@ fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, 
			RTA_PUT(skb, RTA_GATEWAY, 4, &fi->fib_nh->nh_gw);

		if (fi->fib_nh->nh_oif)

			RTA_PUT(skb, RTA_OIF, sizeof(int), &fi->fib_nh->nh_oif);

#ifdef CONFIG_NET_CLS_ROUTE

		if (fi->fib_nh[0].nh_tclassid)

			RTA_PUT(skb, RTA_FLOW, 4, &fi->fib_nh[0].nh_tclassid);

#endif

	}

#ifdef CONFIG_IP_ROUTE_MULTIPATH

	if (fi->fib_nhs > 1) {
@@ -992,6 +992,10 @@ fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, 
			nhp->rtnh_ifindex = nh->nh_oif;

			if (nh->nh_gw)

				RTA_PUT(skb, RTA_GATEWAY, 4, &nh->nh_gw);

#ifdef CONFIG_NET_CLS_ROUTE

			if (nh->nh_tclassid)

				RTA_PUT(skb, RTA_FLOW, 4, &nh->nh_tclassid);

#endif

			nhp->rtnh_len = skb->tail - (unsigned char*)nhp;

		} endfor_nexthops(fi);

		mp_head->rta_type = RTA_MULTIPATH;

CRA Git | Maintained and supported by SUSTech CRA and CCSE