mirror of
https://github.com/ceph/ceph-csi.git
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91774fc936
Uses github.com/libopenstorage/secrets to communicate with Vault. This removes the need for maintaining our own limited Vault APIs. By adding the new dependency, several other packages got updated in the process. Unused indirect dependencies have been removed from go.mod. Signed-off-by: Niels de Vos <ndevos@redhat.com>
92 lines
2.8 KiB
Go
92 lines
2.8 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package procfs
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import (
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"fmt"
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"io/ioutil"
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"strconv"
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"strings"
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)
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// For the proc file format details,
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// see https://elixir.bootlin.com/linux/v4.17/source/net/core/net-procfs.c#L162
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// and https://elixir.bootlin.com/linux/v4.17/source/include/linux/netdevice.h#L2810.
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// SoftnetEntry contains a single row of data from /proc/net/softnet_stat
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type SoftnetEntry struct {
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// Number of processed packets
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Processed uint
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// Number of dropped packets
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Dropped uint
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// Number of times processing packets ran out of quota
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TimeSqueezed uint
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}
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// GatherSoftnetStats reads /proc/net/softnet_stat, parse the relevant columns,
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// and then return a slice of SoftnetEntry's.
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func (fs FS) GatherSoftnetStats() ([]SoftnetEntry, error) {
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data, err := ioutil.ReadFile(fs.proc.Path("net/softnet_stat"))
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if err != nil {
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return nil, fmt.Errorf("error reading softnet %s: %s", fs.proc.Path("net/softnet_stat"), err)
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}
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return parseSoftnetEntries(data)
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}
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func parseSoftnetEntries(data []byte) ([]SoftnetEntry, error) {
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lines := strings.Split(string(data), "\n")
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entries := make([]SoftnetEntry, 0)
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var err error
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const (
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expectedColumns = 11
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)
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for _, line := range lines {
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columns := strings.Fields(line)
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width := len(columns)
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if width == 0 {
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continue
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}
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if width != expectedColumns {
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return []SoftnetEntry{}, fmt.Errorf("%d columns were detected, but %d were expected", width, expectedColumns)
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}
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var entry SoftnetEntry
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if entry, err = parseSoftnetEntry(columns); err != nil {
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return []SoftnetEntry{}, err
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}
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entries = append(entries, entry)
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}
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return entries, nil
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}
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func parseSoftnetEntry(columns []string) (SoftnetEntry, error) {
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var err error
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var processed, dropped, timeSqueezed uint64
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if processed, err = strconv.ParseUint(columns[0], 16, 32); err != nil {
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return SoftnetEntry{}, fmt.Errorf("Unable to parse column 0: %s", err)
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}
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if dropped, err = strconv.ParseUint(columns[1], 16, 32); err != nil {
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return SoftnetEntry{}, fmt.Errorf("Unable to parse column 1: %s", err)
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}
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if timeSqueezed, err = strconv.ParseUint(columns[2], 16, 32); err != nil {
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return SoftnetEntry{}, fmt.Errorf("Unable to parse column 2: %s", err)
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}
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return SoftnetEntry{
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Processed: uint(processed),
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Dropped: uint(dropped),
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TimeSqueezed: uint(timeSqueezed),
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}, nil
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}
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