mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-09 08:59:30 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
119 lines
3.3 KiB
Go
119 lines
3.3 KiB
Go
// Copyright 2020 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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"bufio"
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"bytes"
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"fmt"
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"io"
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"strings"
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"github.com/prometheus/procfs/internal/util"
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)
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// A ConntrackStatEntry represents one line from net/stat/nf_conntrack
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// and contains netfilter conntrack statistics at one CPU core.
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type ConntrackStatEntry struct {
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Entries uint64
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Searched uint64
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Found uint64
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New uint64
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Invalid uint64
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Ignore uint64
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Delete uint64
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DeleteList uint64
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Insert uint64
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InsertFailed uint64
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Drop uint64
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EarlyDrop uint64
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SearchRestart uint64
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}
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// ConntrackStat retrieves netfilter's conntrack statistics, split by CPU cores.
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func (fs FS) ConntrackStat() ([]ConntrackStatEntry, error) {
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return readConntrackStat(fs.proc.Path("net", "stat", "nf_conntrack"))
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}
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// Parses a slice of ConntrackStatEntries from the given filepath.
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func readConntrackStat(path string) ([]ConntrackStatEntry, error) {
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// This file is small and can be read with one syscall.
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b, err := util.ReadFileNoStat(path)
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if err != nil {
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// Do not wrap this error so the caller can detect os.IsNotExist and
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// similar conditions.
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return nil, err
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}
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stat, err := parseConntrackStat(bytes.NewReader(b))
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if err != nil {
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return nil, fmt.Errorf("%w: Cannot read file: %v: %w", ErrFileRead, path, err)
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}
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return stat, nil
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}
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// Reads the contents of a conntrack statistics file and parses a slice of ConntrackStatEntries.
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func parseConntrackStat(r io.Reader) ([]ConntrackStatEntry, error) {
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var entries []ConntrackStatEntry
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scanner := bufio.NewScanner(r)
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scanner.Scan()
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for scanner.Scan() {
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fields := strings.Fields(scanner.Text())
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conntrackEntry, err := parseConntrackStatEntry(fields)
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if err != nil {
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return nil, err
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}
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entries = append(entries, *conntrackEntry)
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}
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return entries, nil
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}
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// Parses a ConntrackStatEntry from given array of fields.
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func parseConntrackStatEntry(fields []string) (*ConntrackStatEntry, error) {
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entries, err := util.ParseHexUint64s(fields)
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if err != nil {
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return nil, fmt.Errorf("%w: Cannot parse entry: %d: %w", ErrFileParse, entries, err)
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}
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numEntries := len(entries)
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if numEntries < 16 || numEntries > 17 {
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return nil,
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fmt.Errorf("%w: invalid conntrackstat entry, invalid number of fields: %d", ErrFileParse, numEntries)
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}
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stats := &ConntrackStatEntry{
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Entries: *entries[0],
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Searched: *entries[1],
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Found: *entries[2],
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New: *entries[3],
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Invalid: *entries[4],
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Ignore: *entries[5],
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Delete: *entries[6],
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DeleteList: *entries[7],
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Insert: *entries[8],
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InsertFailed: *entries[9],
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Drop: *entries[10],
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EarlyDrop: *entries[11],
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}
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// Ignore missing search_restart on Linux < 2.6.35.
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if numEntries == 17 {
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stats.SearchRestart = *entries[16]
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}
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return stats, nil
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}
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