Date: Thu, 6 Apr 2006 15:20:12 GMT From: Vladimir Ivanov <wawa@yandex-team.ru> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/95417: ng_fec doesn't allow jumbo packets Message-ID: <200604061520.k36FKClq028091@www.freebsd.org> Resent-Message-ID: <200604061530.k36FUCga024310@freefall.freebsd.org>
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>Number: 95417
>Category: kern
>Synopsis: ng_fec doesn't allow jumbo packets
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Apr 06 15:30:11 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Vladimir Ivanov
>Release: RELENG_5
>Organization:
Yandex LLC
>Environment:
FreeBSD multiped.yandex.net 5.5-PRERELEASE FreeBSD 5.5-PRERELEASE #0: Tue Apr 4 11:56:54 MSD 2006 root@multiped.yandex.net:/usr/obj/usr/src/sys/MULTIPED-CORE i386
>Description:
FEC (Etherchannel) interface doesn't allowed to use more than 1500 bytes MTU size.
The problem caused by bug in ng_fec.c
They use ether_ioctl to process SIOCSIFMTU ioctl call.
The patch allows to change MTU size according (and in sync) with bundled interfaces' capabilities.
>How-To-Repeat:
ifconfig fec0 mtu 1501
>Fix:
multiped:~$ cat ng_fec.c.patch
--- ng_fec.c.orig Mon Aug 29 20:31:51 2005
+++ ng_fec.c Wed Apr 5 20:36:18 2006
@@ -697,9 +697,29 @@ ng_fec_ioctl(struct ifnet *ifp, u_long c
/* These two are mostly handled at a higher layer */
case SIOCSIFADDR:
case SIOCGIFADDR:
- case SIOCSIFMTU:
error = ether_ioctl(ifp, command, data);
break;
+ case SIOCSIFMTU:
+ if ( (ifr->ifr_mtu < NG_FEC_MTU_MIN ) || (ifr->ifr_mtu > NG_FEC_MTU_MAX) ) {
+ error = EINVAL;
+ } else {
+ struct ng_fec_portlist *p;
+ struct ifnet *bifp;
+ TAILQ_FOREACH(p, &b->ng_fec_ports, fec_list) {
+ bifp = p->fec_if;
+ if ((bifp->if_ioctl)(bifp, SIOCSIFMTU, data)) {
+ error = EINVAL;
+ break;
+ }
+
+ }
+ if (!error) {
+ ifp->if_mtu = ifr->ifr_mtu;
+ ng_fec_init(priv);
+ }
+ }
+ break;
+
/* Set flags */
case SIOCSIFFLAGS:
>Release-Note:
>Audit-Trail:
>Unformatted:
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