c3eecf4f75
Older versions transitively dragged in k8s.io/kubernetes, the newer versions do not. Signed-off-by: Davanum Srinivas <davanum@gmail.com>
103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
// Copyright 2019 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.
|
|
|
|
package procfs
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/procfs/internal/util"
|
|
)
|
|
|
|
// For the proc file format details,
|
|
// See:
|
|
// * Linux 2.6.23 https://elixir.bootlin.com/linux/v2.6.23/source/net/core/dev.c#L2343
|
|
// * Linux 4.17 https://elixir.bootlin.com/linux/v4.17/source/net/core/net-procfs.c#L162
|
|
// and https://elixir.bootlin.com/linux/v4.17/source/include/linux/netdevice.h#L2810.
|
|
|
|
// SoftnetStat contains a single row of data from /proc/net/softnet_stat
|
|
type SoftnetStat struct {
|
|
// Number of processed packets
|
|
Processed uint32
|
|
// Number of dropped packets
|
|
Dropped uint32
|
|
// Number of times processing packets ran out of quota
|
|
TimeSqueezed uint32
|
|
}
|
|
|
|
var softNetProcFile = "net/softnet_stat"
|
|
|
|
// NetSoftnetStat reads data from /proc/net/softnet_stat.
|
|
func (fs FS) NetSoftnetStat() ([]SoftnetStat, error) {
|
|
b, err := util.ReadFileNoStat(fs.proc.Path(softNetProcFile))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
entries, err := parseSoftnet(bytes.NewReader(b))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to parse /proc/net/softnet_stat: %w", err)
|
|
}
|
|
|
|
return entries, nil
|
|
}
|
|
|
|
func parseSoftnet(r io.Reader) ([]SoftnetStat, error) {
|
|
const minColumns = 9
|
|
|
|
s := bufio.NewScanner(r)
|
|
|
|
var stats []SoftnetStat
|
|
for s.Scan() {
|
|
columns := strings.Fields(s.Text())
|
|
width := len(columns)
|
|
|
|
if width < minColumns {
|
|
return nil, fmt.Errorf("%d columns were detected, but at least %d were expected", width, minColumns)
|
|
}
|
|
|
|
// We only parse the first three columns at the moment.
|
|
us, err := parseHexUint32s(columns[0:3])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
stats = append(stats, SoftnetStat{
|
|
Processed: us[0],
|
|
Dropped: us[1],
|
|
TimeSqueezed: us[2],
|
|
})
|
|
}
|
|
|
|
return stats, nil
|
|
}
|
|
|
|
func parseHexUint32s(ss []string) ([]uint32, error) {
|
|
us := make([]uint32, 0, len(ss))
|
|
for _, s := range ss {
|
|
u, err := strconv.ParseUint(s, 16, 32)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
us = append(us, uint32(u))
|
|
}
|
|
|
|
return us, nil
|
|
}
|