[src/trunk]: src/sys/arch/usermode/dev veth_start: copy data from mbuf into a...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/dba1902e8cd1
branches:  trunk
changeset: 772250:dba1902e8cd1
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Dec 26 14:51:20 2011 +0000

description:
veth_start: copy data from mbuf into a buffer and pass that to thunk_write(),
now this driver works as expected

diffstat:

 sys/arch/usermode/dev/if_veth.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (38 lines):

diff -r d29e3c79103c -r dba1902e8cd1 sys/arch/usermode/dev/if_veth.c
--- a/sys/arch/usermode/dev/if_veth.c   Mon Dec 26 14:50:27 2011 +0000
+++ b/sys/arch/usermode/dev/if_veth.c   Mon Dec 26 14:51:20 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_veth.c,v 1.1 2011/12/26 12:39:19 jmcneill Exp $ */
+/* $NetBSD: if_veth.c,v 1.2 2011/12/26 14:51:20 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2011 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_veth.c,v 1.1 2011/12/26 12:39:19 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_veth.c,v 1.2 2011/12/26 14:51:20 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -75,6 +75,7 @@
        int                     sc_tapfd;
        uint8_t                 sc_eaddr[ETHER_ADDR_LEN];
        uint8_t                 sc_rx_buf[4096 + 65536];
+       uint8_t                 sc_tx_buf[4096 + 65536];
        void                    *sc_rx_ih;
        void                    *sc_rx_intr;
        void                    *sc_tx_intr;
@@ -269,8 +270,10 @@
                IFQ_DEQUEUE(&ifp->if_snd, m0);
                bpf_mtap(ifp, m0);
 
+               m_copydata(m0, 0, m0->m_pkthdr.len, sc->sc_tx_buf);
+
                vethprintf("write %d bytes...\n", m0->m_pkthdr.len);
-               len = thunk_write(sc->sc_tapfd, mtod(m0, void *),
+               len = thunk_write(sc->sc_tapfd, sc->sc_tx_buf,
                    m0->m_pkthdr.len);
                vethprintf("write returned %d\n", len);
                if (len > 0)