mirror of
https://github.com/prometheus/node_exporter
synced 2024-12-25 07:32:07 +00:00
92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
// Copyright 2015 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 !nofilesystem
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bytes"
|
|
"unsafe"
|
|
|
|
"github.com/prometheus/common/log"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
const (
|
|
defIgnoredMountPoints = "^/(dev)($|/)"
|
|
defIgnoredFSTypes = "^devfs$"
|
|
readOnly = 0x1 // MNT_RDONLY
|
|
noWait = 0x2 // MNT_NOWAIT
|
|
)
|
|
|
|
func gostring(b []int8) string {
|
|
bb := *(*[]byte)(unsafe.Pointer(&b))
|
|
idx := bytes.IndexByte(bb, 0)
|
|
if idx < 0 {
|
|
return ""
|
|
}
|
|
return string(bb[:idx])
|
|
}
|
|
|
|
// Expose filesystem fullness.
|
|
func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
|
|
buf := make([]unix.Statfs_t, 16)
|
|
for {
|
|
n, err := unix.Getfsstat(buf, noWait)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if n < len(buf) {
|
|
buf = buf[:n]
|
|
break
|
|
}
|
|
buf = make([]unix.Statfs_t, len(buf)*2)
|
|
}
|
|
stats = []filesystemStats{}
|
|
for _, fs := range buf {
|
|
mountpoint := gostring(fs.Mntonname[:])
|
|
if c.ignoredMountPointsPattern.MatchString(mountpoint) {
|
|
log.Debugf("Ignoring mount point: %s", mountpoint)
|
|
continue
|
|
}
|
|
|
|
device := gostring(fs.Mntfromname[:])
|
|
fstype := gostring(fs.Fstypename[:])
|
|
if c.ignoredFSTypesPattern.MatchString(fstype) {
|
|
log.Debugf("Ignoring fs type: %s", fstype)
|
|
continue
|
|
}
|
|
|
|
var ro float64
|
|
if (fs.Flags & readOnly) != 0 {
|
|
ro = 1
|
|
}
|
|
|
|
stats = append(stats, filesystemStats{
|
|
labels: filesystemLabels{
|
|
device: device,
|
|
mountPoint: mountpoint,
|
|
fsType: fstype,
|
|
},
|
|
size: float64(fs.Blocks) * float64(fs.Bsize),
|
|
free: float64(fs.Bfree) * float64(fs.Bsize),
|
|
avail: float64(fs.Bavail) * float64(fs.Bsize),
|
|
files: float64(fs.Files),
|
|
filesFree: float64(fs.Ffree),
|
|
ro: ro,
|
|
})
|
|
}
|
|
return stats, nil
|
|
}
|