mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-10 01:19:29 +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>
99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
// Copyright 2021 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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"strconv"
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"strings"
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"github.com/prometheus/procfs/internal/util"
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)
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// CgroupSummary models one line from /proc/cgroups.
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// This file contains information about the controllers that are compiled into the kernel.
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//
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// Also see http://man7.org/linux/man-pages/man7/cgroups.7.html
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type CgroupSummary struct {
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// The name of the controller. controller is also known as subsystem.
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SubsysName string
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// The unique ID of the cgroup hierarchy on which this controller is mounted.
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Hierarchy int
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// The number of control groups in this hierarchy using this controller.
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Cgroups int
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// This field contains the value 1 if this controller is enabled, or 0 if it has been disabled
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Enabled int
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}
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// parseCgroupSummary parses each line of the /proc/cgroup file
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// Line format is `subsys_name hierarchy num_cgroups enabled`.
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func parseCgroupSummaryString(CgroupSummaryStr string) (*CgroupSummary, error) {
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var err error
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fields := strings.Fields(CgroupSummaryStr)
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// require at least 4 fields
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if len(fields) < 4 {
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return nil, fmt.Errorf("%w: 4+ fields required, found %d fields in cgroup info string: %s", ErrFileParse, len(fields), CgroupSummaryStr)
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}
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CgroupSummary := &CgroupSummary{
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SubsysName: fields[0],
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}
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CgroupSummary.Hierarchy, err = strconv.Atoi(fields[1])
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if err != nil {
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return nil, fmt.Errorf("%w: Unable to parse hierarchy ID from %q", ErrFileParse, fields[1])
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}
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CgroupSummary.Cgroups, err = strconv.Atoi(fields[2])
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if err != nil {
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return nil, fmt.Errorf("%w: Unable to parse Cgroup Num from %q", ErrFileParse, fields[2])
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}
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CgroupSummary.Enabled, err = strconv.Atoi(fields[3])
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if err != nil {
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return nil, fmt.Errorf("%w: Unable to parse Enabled from %q", ErrFileParse, fields[3])
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}
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return CgroupSummary, nil
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}
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// parseCgroupSummary reads each line of the /proc/cgroup file.
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func parseCgroupSummary(data []byte) ([]CgroupSummary, error) {
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var CgroupSummarys []CgroupSummary
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scanner := bufio.NewScanner(bytes.NewReader(data))
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for scanner.Scan() {
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CgroupSummaryString := scanner.Text()
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// ignore comment lines
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if strings.HasPrefix(CgroupSummaryString, "#") {
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continue
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}
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CgroupSummary, err := parseCgroupSummaryString(CgroupSummaryString)
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if err != nil {
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return nil, err
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}
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CgroupSummarys = append(CgroupSummarys, *CgroupSummary)
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}
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err := scanner.Err()
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return CgroupSummarys, err
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}
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// CgroupSummarys returns information about current /proc/cgroups.
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func (fs FS) CgroupSummarys() ([]CgroupSummary, error) {
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data, err := util.ReadFileNoStat(fs.proc.Path("cgroups"))
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if err != nil {
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return nil, err
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}
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return parseCgroupSummary(data)
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}
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