Date: Sat, 21 Oct 2000 14:36:20 +0400 (MSD) From: yar@comp.chem.msu.su To: FreeBSD-gnats-submit@freebsd.org Subject: kern/22178: Output byte counter on VLAN parent not advancing Message-ID: <200010211036.e9LAaKB00424@yar.chem.msu.su>
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>Number: 22178
>Category: kern
>Synopsis: Output byte counter on VLAN parent not advancing
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Oct 21 03:40:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Yar Tikhiy
>Release: FreeBSD 4.1-STABLE i386
>Organization:
Moscow State University
>Environment:
The bug shows up in all branches.
>Description:
While the output packet counter on an ethernet interface
is incremented by its hardware driver, the output byte and
output multicast counters are advanced by ether_output().
However, when an ethernet interface acts as a parent for a set
of VLAN interfaces, ether_output() is bypassed for it. Therefore,
it's a duty of vlan_start() to update the counters.
Additionally, the output packet counter of the vlan interface
itself is advanced at a wrong place: even if p->if_start()
isn't called due to the IFF_OACTIVE flag, the packet
has already been enqueued for transmission and will be sent
out.
>How-To-Repeat:
Use the vlan driver and see zero output byte counter on its
parent interface with "netstat -i"
>Fix:
--- if_vlan.c.orig Sat Oct 21 14:13:01 2000
+++ if_vlan.c Sat Oct 21 14:21:58 2000
@@ -269,10 +269,12 @@
continue;
}
IF_ENQUEUE(&p->if_snd, m);
- if ((p->if_flags & IFF_OACTIVE) == 0) {
+ ifp->if_opackets++;
+ p->if_obytes += m->m_pkthdr.len;
+ if (m->m_flags & M_MCAST)
+ p->if_omcasts++;
+ if ((p->if_flags & IFF_OACTIVE) == 0)
p->if_start(p);
- ifp->if_opackets++;
- }
}
ifp->if_flags &= ~IFF_OACTIVE;
>Release-Note:
>Audit-Trail:
>Unformatted:
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