53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
|
// Copyright 2017 The Prometheus Authors
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
// +build !nomeminfo
|
||
|
|
// +build freebsd dragonfly
|
||
|
|
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <kvm.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <paths.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
int _kvm_swap_used_pages(uint64_t *out) {
|
||
|
|
const int total_only = 1; // from kvm_getswapinfo(3)
|
||
|
|
|
||
|
|
kvm_t *kd;
|
||
|
|
struct kvm_swap current;
|
||
|
|
|
||
|
|
kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, NULL);
|
||
|
|
if (kd == NULL) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (kvm_getswapinfo(kd, ¤t, total_only, 0) == -1) {
|
||
|
|
goto error1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (kvm_close(kd) != 0) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
kd = NULL;
|
||
|
|
|
||
|
|
*out = current.ksw_used;
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error1:
|
||
|
|
if (kd != NULL) {
|
||
|
|
kvm_close(kd);
|
||
|
|
}
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|