f2069331e5
which is the wrapper around the vm.swap_objects sysctl, same as kinfo_getvmobject(3) wraps vm.objects. Submitted by: Yoshihiro Ota MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29754
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/*
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* Copyright (c) 2013 Hudson River Trading LLC
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* Written by: John H. Baldwin <jhb@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libutil.h"
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static struct kinfo_vmobject *
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kinfo_getvmobject_impl(int *cntp, const char *vmobjsysctl)
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{
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char *buf, *bp, *ep;
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struct kinfo_vmobject *kvo, *list, *kp;
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size_t len;
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int cnt, i;
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buf = NULL;
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for (i = 0; i < 3; i++) {
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if (sysctlbyname(vmobjsysctl, NULL, &len, NULL, 0) < 0) {
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free(buf);
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return (NULL);
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}
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buf = reallocf(buf, len);
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if (buf == NULL)
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return (NULL);
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if (sysctlbyname(vmobjsysctl, buf, &len, NULL, 0) == 0)
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goto unpack;
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if (errno != ENOMEM) {
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free(buf);
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return (NULL);
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}
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}
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free(buf);
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return (NULL);
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unpack:
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/* Count items */
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cnt = 0;
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bp = buf;
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ep = buf + len;
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while (bp < ep) {
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kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
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bp += kvo->kvo_structsize;
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cnt++;
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}
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list = calloc(cnt, sizeof(*list));
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if (list == NULL) {
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free(buf);
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return (NULL);
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}
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/* Unpack */
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bp = buf;
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kp = list;
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while (bp < ep) {
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kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
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memcpy(kp, kvo, kvo->kvo_structsize);
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bp += kvo->kvo_structsize;
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kp->kvo_structsize = sizeof(*kp);
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kp++;
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}
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free(buf);
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*cntp = cnt;
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return (list);
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}
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struct kinfo_vmobject *
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kinfo_getvmobject(int *cntp)
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{
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return (kinfo_getvmobject_impl(cntp, "vm.objects"));
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}
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struct kinfo_vmobject *
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kinfo_getswapvmobject(int *cntp)
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{
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return (kinfo_getvmobject_impl(cntp, "vm.swap_objects"));
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}
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