Module Name: src
Committed By: ozaki-r
Date: Thu Aug 15 04:20:59 UTC 2019
Modified Files:
src/sys/net: if.c
Log Message:
Restore if_ioctl on error of ifc_destroy
Otherwise subsequence ioctls won't work.
Patch from Harold Gutch on PR kern/54434 (tweaked a bit by me)
To generate a diff of this commit:
cvs rdiff -u -r1.457 -r1.458 src/sys/net/if.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/net/if.c
diff -u src/sys/net/if.c:1.457 src/sys/net/if.c:1.458
--- src/sys/net/if.c:1.457 Thu Jul 25 07:45:57 2019
+++ src/sys/net/if.c Thu Aug 15 04:20:59 2019
@@ -1,4 +1,4 @@
-/* $NetBSD: if.c,v 1.457 2019/07/25 07:45:57 knakahara Exp $ */
+/* $NetBSD: if.c,v 1.458 2019/08/15 04:20:59 ozaki-r Exp $ */
/*-
* Copyright (c) 1999, 2000, 2001, 2008 The NetBSD Foundation, Inc.
@@ -90,7 +90,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.457 2019/07/25 07:45:57 knakahara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.458 2019/08/15 04:20:59 ozaki-r Exp $");
#if defined(_KERNEL_OPT)
#include "opt_inet.h"
@@ -1611,6 +1611,8 @@ if_clone_destroy(const char *name)
struct if_clone *ifc;
struct ifnet *ifp;
struct psref psref;
+ int error;
+ int (*if_ioctl)(struct ifnet *, u_long, void *);
KASSERT(mutex_owned(&if_clone_mtx));
@@ -1627,6 +1629,7 @@ if_clone_destroy(const char *name)
/* We have to disable ioctls here */
IFNET_LOCK(ifp);
+ if_ioctl = ifp->if_ioctl;
ifp->if_ioctl = if_nullioctl;
IFNET_UNLOCK(ifp);
@@ -1636,7 +1639,16 @@ if_clone_destroy(const char *name)
*/
if_put(ifp, &psref);
- return (*ifc->ifc_destroy)(ifp);
+ error = (*ifc->ifc_destroy)(ifp);
+
+ if (error != 0) {
+ /* We have to restore if_ioctl on error */
+ IFNET_LOCK(ifp);
+ ifp->if_ioctl = if_ioctl;
+ IFNET_UNLOCK(ifp);
+ }
+
+ return error;
}
static bool
