this lets ifconfig show the MTU on interfaces like nvgre, vxlan, etc.
they currently don't show it because they also implement a bridge ioctl,
so ifconfig thinks they're a bridge.
why ifconfig hides the mtu on bridges looks to be a hold over from when
brconfig was merged into ifconfig. if we dont want bridge(4) to report
an mtu, then i can make bridge(4) itself hide the mtu or stop setting
the mtu.
found by jason tubnor.
ok?
Index: ifconfig.c
===================================================================
RCS file: /cvs/src/sbin/ifconfig/ifconfig.c,v
retrieving revision 1.451
diff -u -p -r1.451 ifconfig.c
--- ifconfig.c 23 Nov 2021 19:13:45 -0000 1.451
+++ ifconfig.c 22 Feb 2022 05:38:48 -0000
@@ -1027,11 +1027,7 @@ getinfo(struct ifreq *ifr, int create)
metric = 0;
else
metric = ifr->ifr_metric;
-#ifdef SMALL
if (ioctl(sock, SIOCGIFMTU, (caddr_t)ifr) == -1)
-#else
- if (is_bridge() || ioctl(sock, SIOCGIFMTU, (caddr_t)ifr) == -1)
-#endif
mtu = 0;
else
mtu = ifr->ifr_mtu;
