[src/trunk]: src/sys/net Revoke bpf device on detach.

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

details:   https://anonhg.NetBSD.org/src/rev/b9fe66ceb65c
branches:  trunk
changeset: 481580:b9fe66ceb65c
user:      enami <enami%NetBSD.org@localhost>
date:      Wed Feb 02 09:03:41 2000 +0000

description:
Revoke bpf device on detach.

diffstat:

 sys/net/bpf.c |  27 ++++++++++++++++++++++++++-
 1 files changed, 26 insertions(+), 1 deletions(-)

diffs (48 lines):

diff -r 1f3e73500269 -r b9fe66ceb65c sys/net/bpf.c
--- a/sys/net/bpf.c     Wed Feb 02 08:57:51 2000 +0000
+++ b/sys/net/bpf.c     Wed Feb 02 09:03:41 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bpf.c,v 1.50 2000/02/02 08:36:02 enami Exp $   */
+/*     $NetBSD: bpf.c,v 1.51 2000/02/02 09:03:41 enami Exp $   */
 
 /*
  * Copyright (c) 1990, 1991, 1993
@@ -54,6 +54,7 @@
 #include <sys/ioctl.h>
 #include <sys/map.h>
 #include <sys/conf.h>
+#include <sys/vnode.h>
 
 #include <sys/file.h>
 #if defined(sparc) && BSD < 199103
@@ -1336,6 +1337,30 @@
        struct ifnet *ifp;
 {
        struct bpf_if *bp, **pbp;
+       struct bpf_d *d;
+       int i, s, cmaj;
+
+       /* locate the major number */
+       for (cmaj = 0; cmaj <= nchrdev; cmaj++)
+               if (cdevsw[cmaj].d_open == bpfopen)
+                       break;
+
+       /* Nuke the the vnodes for any open instances */
+       for (i = 0; i < NBPFILTER; ++i) {
+               d = &bpf_dtab[i];
+               if (!D_ISFREE(d) && d->bd_bif != NULL &&
+                   d->bd_bif->bif_ifp == ifp) {
+                       /*
+                        * Detach the descriptor from an interface now.
+                        * It will be free'ed later by close routine.
+                        */
+                       s = splimp();
+                       d->bd_promisc = 0;      /* we can't touch device. */
+                       bpf_detachd(d);
+                       splx(s);
+                       vdevgone(cmaj, i, i, VCHR);
+               }
+       }
 
        for (bp = bpf_iflist, pbp = &bpf_iflist;
             bp != NULL; pbp = &bp->bif_next, bp = bp->bif_next) {