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PR/49373: Ryota Ozaki: Running if_clone_create and if_clone_destroy in 

parallel causes panic
XXX: Pullup 7.
This commit is contained in:
christos 2014-11-07 12:57:42 +00:00
parent 4d99909a7f
commit a5d8dd44b5
1 changed files with 9 additions and 3 deletions
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12
sys/net/if.c
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@ -1,4 +1,4 @@
/* $NetBSD: if.c,v 1.291 2014/09/09 20:16:12 rmind Exp $ */
/* $NetBSD: if.c,v 1.292 2014/11/07 12:57:42 christos 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 1.291 2014/09/09 20:16:12 rmind Exp $");
__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.292 2014/11/07 12:57:42 christos Exp $");
#include "opt_inet.h"
@ -164,6 +164,7 @@ static u_int if_index = 1;
static size_t if_indexlim = 0;
static uint64_t index_gen;
static kmutex_t index_gen_mtx;
static kmutex_t if_clone_mtx;
static struct ifaddr ** ifnet_addrs = NULL;
@ -252,6 +253,7 @@ void
ifinit1(void)
{
mutex_init(&index_gen_mtx, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&if_clone_mtx, MUTEX_DEFAULT, IPL_NONE);
TAILQ_INIT(&ifnet_list);
if_indexlim = 8;
@ -1850,6 +1852,7 @@ doifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l)
struct ifreq ifrb;
struct oifreq *oifr = NULL;
#endif
int r;
switch (cmd) {
#ifdef COMPAT_OIFREQ
@ -1891,9 +1894,12 @@ doifioctl(struct socket *so, u_long cmd, void *data, struct lwp *l)
if (error != 0)
return error;
}
return (cmd == SIOCIFCREATE) ?
mutex_enter(&if_clone_mtx);
r = (cmd == SIOCIFCREATE) ?
if_clone_create(ifr->ifr_name) :
if_clone_destroy(ifr->ifr_name);
mutex_exit(&if_clone_mtx);
return r;
case SIOCIFGCLONERS:
return if_clone_list((struct if_clonereq *)data);