[src/trunk]: src/sys/net Make sure to call ifp->if_output() with KERNEL_LOCK ...

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

details:   https://anonhg.NetBSD.org/src/rev/225722abaafc
branches:  trunk
changeset: 330661:225722abaafc
user:      bouyer <bouyer%NetBSD.org@localhost>
date:      Thu Jul 17 10:46:57 2014 +0000

description:
Make sure to call ifp->if_output() with KERNEL_LOCK held.
Should fix mpls-related atf tests.

diffstat:

 sys/net/if_mpls.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (47 lines):

diff -r 2fb7a35e8e92 -r 225722abaafc sys/net/if_mpls.c
--- a/sys/net/if_mpls.c Thu Jul 17 10:21:51 2014 +0000
+++ b/sys/net/if_mpls.c Thu Jul 17 10:46:57 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_mpls.c,v 1.15 2014/07/09 14:41:42 rtr Exp $ */
+/*     $NetBSD: if_mpls.c,v 1.16 2014/07/17 10:46:57 bouyer Exp $ */
 
 /*
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_mpls.c,v 1.15 2014/07/09 14:41:42 rtr Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_mpls.c,v 1.16 2014/07/17 10:46:57 bouyer Exp $");
 
 #include "opt_inet.h"
 #include "opt_mpls.h"
@@ -205,6 +205,8 @@
        int err;
        uint psize = sizeof(struct sockaddr_mpls);
 
+       KASSERT(KERNEL_LOCKED_P());
+
        if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
                m_freem(m);
                return ENETDOWN;
@@ -448,6 +450,7 @@
 mpls_send_frame(struct mbuf *m, struct ifnet *ifp, struct rtentry *rt)
 {
        union mpls_shim msh;
+       int ret;
 
        if ((rt->rt_flags & RTF_GATEWAY) == 0)
                return EHOSTUNREACH;
@@ -466,7 +469,10 @@
        case IFT_ETHER:
        case IFT_TUNNEL:
        case IFT_LOOP:
-               return (*ifp->if_output)(ifp, m, rt->rt_gateway, rt);
+               KERNEL_LOCK(1, NULL);
+               ret =  (*ifp->if_output)(ifp, m, rt->rt_gateway, rt);
+               KERNEL_UNLOCK_ONE(NULL);
+               return ret;
                break;
        default:
                return ENETUNREACH;