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With recent changes to BPF, pushing the default buffer size to 1MB, running

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a bunch of small daemons that seem small packet flows can easily chew up
significant kernel memory (each BPF device opened takes 2*buffersize of
wired memory.)  In each of these applications, add code to set the buffer
size to 32k before setting the interface.
This commit is contained in:
darrenr
2004-04-10 17:53:05 +00:00
parent 3be975349e
commit 9cfabb6d83
1 changed files with 7 additions and 2 deletions
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9
common/pf.c
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@@ -1,4 +1,4 @@
/* $NetBSD: pf.c,v 1.8 2003/04/20 00:17:22 christos Exp $ */
/* $NetBSD: pf.c,v 1.9 2004/04/10 17:53:05 darrenr Exp $ */
/*
* Copyright (c) 1993-95 Mats O Jansson. All rights reserved.
@@ -35,7 +35,7 @@
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: pf.c,v 1.8 2003/04/20 00:17:22 christos Exp $");
__RCSID("$NetBSD: pf.c,v 1.9 2004/04/10 17:53:05 darrenr Exp $");
#endif
#include "os.h"
@@ -82,6 +82,7 @@ pfInit(interface, mode, protocol, typ)
struct ifreq ifr;
u_int dlt;
int immediate;
u_int bufsize;
static struct bpf_insn insns[] = {
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, 12),
@@ -115,6 +116,10 @@ pfInit(interface, mode, protocol, typ)
mopLogWarn("pfInit: BIOCIMMEDIATE");
return(-1);
}
bufsize = 32768;
if (ioctl(fd, BIOCSBLEN, &bufsize) < 0) {
mopLogWarn("pfInit: BIOCSBLEN(%d)", bufsize);
}
(void) strncpy(ifr.ifr_name, interface, sizeof ifr.ifr_name);
if (ioctl(fd, BIOCSETIF, (caddr_t) & ifr) < 0) {
mopLogWarn("pfInit: BIOCSETIF");