ceph-csi/vendor/github.com/prometheus/procfs/proc_fdinfo.go
dependabot[bot] b2ae48dc2d rebase: bump the github-dependencies group with 5 updates
Bumps the github-dependencies group with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) | `1.49.0` | `1.49.13` |
| [github.com/aws/aws-sdk-go-v2/service/sts](https://github.com/aws/aws-sdk-go-v2) | `1.26.5` | `1.26.6` |
| [github.com/google/uuid](https://github.com/google/uuid) | `1.4.0` | `1.5.0` |
| [github.com/kubernetes-csi/csi-lib-utils](https://github.com/kubernetes-csi/csi-lib-utils) | `0.14.0` | `0.17.0` |
| [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) | `1.17.0` | `1.18.0` |


Updates `github.com/aws/aws-sdk-go` from 1.49.0 to 1.49.13
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.49.0...v1.49.13)

Updates `github.com/aws/aws-sdk-go-v2/service/sts` from 1.26.5 to 1.26.6
- [Release notes](https://github.com/aws/aws-sdk-go-v2/releases)
- [Commits](https://github.com/aws/aws-sdk-go-v2/compare/service/s3/v1.26.5...service/s3/v1.26.6)

Updates `github.com/google/uuid` from 1.4.0 to 1.5.0
- [Release notes](https://github.com/google/uuid/releases)
- [Changelog](https://github.com/google/uuid/blob/master/CHANGELOG.md)
- [Commits](https://github.com/google/uuid/compare/v1.4.0...v1.5.0)

Updates `github.com/kubernetes-csi/csi-lib-utils` from 0.14.0 to 0.17.0
- [Release notes](https://github.com/kubernetes-csi/csi-lib-utils/releases)
- [Commits](https://github.com/kubernetes-csi/csi-lib-utils/compare/v0.14.0...v0.17.0)

Updates `github.com/prometheus/client_golang` from 1.17.0 to 1.18.0
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.17.0...v1.18.0)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-dependencies
- dependency-name: github.com/aws/aws-sdk-go-v2/service/sts
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-dependencies
- dependency-name: github.com/google/uuid
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-dependencies
- dependency-name: github.com/kubernetes-csi/csi-lib-utils
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-dependencies
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>
2024-01-03 21:23:15 +00:00

139 lines
3.6 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"
"regexp"
"github.com/prometheus/procfs/internal/util"
)
var (
rPos = regexp.MustCompile(`^pos:\s+(\d+)$`)
rFlags = regexp.MustCompile(`^flags:\s+(\d+)$`)
rMntID = regexp.MustCompile(`^mnt_id:\s+(\d+)$`)
rIno = regexp.MustCompile(`^ino:\s+(\d+)$`)
rInotify = regexp.MustCompile(`^inotify`)
rInotifyParts = regexp.MustCompile(`^inotify\s+wd:([0-9a-f]+)\s+ino:([0-9a-f]+)\s+sdev:([0-9a-f]+)(?:\s+mask:([0-9a-f]+))?`)
)
// ProcFDInfo contains represents file descriptor information.
type ProcFDInfo struct {
// File descriptor
FD string
// File offset
Pos string
// File access mode and status flags
Flags string
// Mount point ID
MntID string
// Inode number
Ino string
// List of inotify lines (structured) in the fdinfo file (kernel 3.8+ only)
InotifyInfos []InotifyInfo
}
// FDInfo constructor. On kernels older than 3.8, InotifyInfos will always be empty.
func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
data, err := util.ReadFileNoStat(p.path("fdinfo", fd))
if err != nil {
return nil, err
}
var text, pos, flags, mntid, ino string
var inotify []InotifyInfo
scanner := bufio.NewScanner(bytes.NewReader(data))
for scanner.Scan() {
text = scanner.Text()
if rPos.MatchString(text) {
pos = rPos.FindStringSubmatch(text)[1]
} else if rFlags.MatchString(text) {
flags = rFlags.FindStringSubmatch(text)[1]
} else if rMntID.MatchString(text) {
mntid = rMntID.FindStringSubmatch(text)[1]
} else if rIno.MatchString(text) {
ino = rIno.FindStringSubmatch(text)[1]
} else if rInotify.MatchString(text) {
newInotify, err := parseInotifyInfo(text)
if err != nil {
return nil, err
}
inotify = append(inotify, *newInotify)
}
}
i := &ProcFDInfo{
FD: fd,
Pos: pos,
Flags: flags,
MntID: mntid,
Ino: ino,
InotifyInfos: inotify,
}
return i, nil
}
// InotifyInfo represents a single inotify line in the fdinfo file.
type InotifyInfo struct {
// Watch descriptor number
WD string
// Inode number
Ino string
// Device ID
Sdev string
// Mask of events being monitored
Mask string
}
// InotifyInfo constructor. Only available on kernel 3.8+.
func parseInotifyInfo(line string) (*InotifyInfo, error) {
m := rInotifyParts.FindStringSubmatch(line)
if len(m) >= 4 {
var mask string
if len(m) == 5 {
mask = m[4]
}
i := &InotifyInfo{
WD: m[1],
Ino: m[2],
Sdev: m[3],
Mask: mask,
}
return i, nil
}
return nil, fmt.Errorf("%w: invalid inode entry: %q", ErrFileParse, line)
}
// ProcFDInfos represents a list of ProcFDInfo structs.
type ProcFDInfos []ProcFDInfo
func (p ProcFDInfos) Len() int { return len(p) }
func (p ProcFDInfos) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
func (p ProcFDInfos) Less(i, j int) bool { return p[i].FD < p[j].FD }
// InotifyWatchLen returns the total number of inotify watches.
func (p ProcFDInfos) InotifyWatchLen() (int, error) {
length := 0
for _, f := range p {
length += len(f.InotifyInfos)
}
return length, nil
}