mirror of
https://github.com/octoleo/syncthing.git
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051cbdc713
I don't really understand under what circumstances, but sometimes these calls panic with a "panic: counter cannot decrease in value" because the value passed to Add() was negative.
342 lines
9.3 KiB
Go
342 lines
9.3 KiB
Go
// Copyright (C) 2023 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package fs
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import (
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"context"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/syncthing/syncthing/lib/protocol"
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)
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var (
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metricTotalOperationSeconds = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: "syncthing",
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Subsystem: "fs",
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Name: "operation_seconds_total",
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Help: "Total time spent in filesystem operations, per filesystem root and operation",
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}, []string{"root", "operation"})
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metricTotalOperationsCount = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: "syncthing",
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Subsystem: "fs",
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Name: "operations_total",
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Help: "Total number of filesystem operations, per filesystem root and operation",
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}, []string{"root", "operation"})
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metricTotalBytesCount = promauto.NewCounterVec(prometheus.CounterOpts{
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Namespace: "syncthing",
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Subsystem: "fs",
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Name: "operation_bytes_total",
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Help: "Total number of filesystem bytes transferred, per filesystem root and operation",
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}, []string{"root", "operation"})
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)
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const (
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// fs operations
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metricOpChmod = "chmod"
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metricOpLchmod = "lchmod"
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metricOpChtimes = "chtimes"
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metricOpCreate = "create"
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metricOpCreateSymlink = "createsymlink"
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metricOpDirNames = "dirnames"
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metricOpLstat = "lstat"
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metricOpMkdir = "mdkir"
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metricOpMkdirAll = "mkdirall"
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metricOpOpen = "open"
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metricOpOpenFile = "openfile"
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metricOpReadSymlink = "readsymlink"
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metricOpRemove = "remove"
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metricOpRemoveAll = "removeall"
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metricOpRename = "rename"
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metricOpStat = "stat"
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metricOpSymlinksSupported = "symlinkssupported"
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metricOpWalk = "walk"
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metricOpWatch = "watch"
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metricOpHide = "hide"
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metricOpUnhide = "unhide"
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metricOpGlob = "glob"
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metricOpRoots = "roots"
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metricOpUsage = "usage"
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metricOpType = "type"
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metricOpURI = "uri"
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metricOpOptions = "options"
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metricOpSameFile = "samefile"
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metricOpPlatformData = "platformdata"
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metricOpGetXattr = "getxattr"
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metricOpSetXattr = "setxattr"
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// file operations
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metricOpRead = "read"
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metricOpReadAt = "readat"
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metricOpWrite = "write"
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metricOpWriteAt = "writeat"
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metricOpTruncate = "truncate"
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metricOpSeek = "seek"
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metricOpSync = "sync"
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metricOpClose = "close"
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metricOpName = "name"
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)
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type metricsFS struct {
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next Filesystem
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}
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var _ Filesystem = (*metricsFS)(nil)
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func (m *metricsFS) account(op string) func(bytes int) {
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t0 := time.Now()
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root := m.next.URI()
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return func(bytes int) {
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if dur := time.Since(t0).Seconds(); dur > 0 {
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metricTotalOperationSeconds.WithLabelValues(root, op).Add(dur)
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}
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metricTotalOperationsCount.WithLabelValues(root, op).Inc()
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if bytes >= 0 {
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metricTotalBytesCount.WithLabelValues(root, op).Add(float64(bytes))
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}
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}
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}
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func (m *metricsFS) Chmod(name string, mode FileMode) error {
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defer m.account(metricOpChmod)(-1)
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return m.next.Chmod(name, mode)
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}
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func (m *metricsFS) Lchown(name string, uid, gid string) error {
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defer m.account(metricOpLchmod)(-1)
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return m.next.Lchown(name, uid, gid)
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}
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func (m *metricsFS) Chtimes(name string, atime time.Time, mtime time.Time) error {
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defer m.account(metricOpChtimes)(-1)
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return m.next.Chtimes(name, atime, mtime)
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}
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func (m *metricsFS) Create(name string) (File, error) {
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defer m.account(metricOpCreate)(-1)
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f, err := m.next.Create(name)
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if err != nil {
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return nil, err
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}
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return &metricsFile{next: f, fs: m}, nil
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}
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func (m *metricsFS) CreateSymlink(target, name string) error {
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defer m.account(metricOpCreateSymlink)(-1)
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return m.next.CreateSymlink(target, name)
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}
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func (m *metricsFS) DirNames(name string) ([]string, error) {
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defer m.account(metricOpDirNames)(-1)
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return m.next.DirNames(name)
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}
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func (m *metricsFS) Lstat(name string) (FileInfo, error) {
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defer m.account(metricOpLstat)(-1)
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return m.next.Lstat(name)
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}
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func (m *metricsFS) Mkdir(name string, perm FileMode) error {
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defer m.account(metricOpMkdir)(-1)
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return m.next.Mkdir(name, perm)
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}
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func (m *metricsFS) MkdirAll(name string, perm FileMode) error {
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defer m.account(metricOpMkdirAll)(-1)
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return m.next.MkdirAll(name, perm)
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}
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func (m *metricsFS) Open(name string) (File, error) {
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defer m.account(metricOpOpen)(-1)
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f, err := m.next.Open(name)
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if err != nil {
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return nil, err
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}
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return &metricsFile{next: f, fs: m}, nil
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}
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func (m *metricsFS) OpenFile(name string, flags int, mode FileMode) (File, error) {
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defer m.account(metricOpOpenFile)(-1)
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f, err := m.next.OpenFile(name, flags, mode)
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if err != nil {
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return nil, err
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}
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return &metricsFile{next: f, fs: m}, nil
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}
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func (m *metricsFS) ReadSymlink(name string) (string, error) {
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defer m.account(metricOpReadSymlink)(-1)
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return m.next.ReadSymlink(name)
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}
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func (m *metricsFS) Remove(name string) error {
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defer m.account(metricOpRemove)(-1)
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return m.next.Remove(name)
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}
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func (m *metricsFS) RemoveAll(name string) error {
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defer m.account(metricOpRemoveAll)(-1)
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return m.next.RemoveAll(name)
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}
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func (m *metricsFS) Rename(oldname, newname string) error {
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defer m.account(metricOpRename)(-1)
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return m.next.Rename(oldname, newname)
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}
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func (m *metricsFS) Stat(name string) (FileInfo, error) {
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defer m.account(metricOpStat)(-1)
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return m.next.Stat(name)
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}
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func (m *metricsFS) SymlinksSupported() bool {
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defer m.account(metricOpSymlinksSupported)(-1)
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return m.next.SymlinksSupported()
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}
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func (m *metricsFS) Walk(name string, walkFn WalkFunc) error {
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defer m.account(metricOpWalk)(-1)
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return m.next.Walk(name, walkFn)
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}
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func (m *metricsFS) Watch(path string, ignore Matcher, ctx context.Context, ignorePerms bool) (<-chan Event, <-chan error, error) {
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defer m.account(metricOpWatch)(-1)
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return m.next.Watch(path, ignore, ctx, ignorePerms)
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}
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func (m *metricsFS) Hide(name string) error {
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defer m.account(metricOpHide)(-1)
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return m.next.Hide(name)
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}
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func (m *metricsFS) Unhide(name string) error {
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defer m.account(metricOpUnhide)(-1)
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return m.next.Unhide(name)
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}
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func (m *metricsFS) Glob(pattern string) ([]string, error) {
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defer m.account(metricOpGlob)(-1)
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return m.next.Glob(pattern)
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}
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func (m *metricsFS) Roots() ([]string, error) {
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defer m.account(metricOpRoots)(-1)
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return m.next.Roots()
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}
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func (m *metricsFS) Usage(name string) (Usage, error) {
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defer m.account(metricOpUsage)(-1)
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return m.next.Usage(name)
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}
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func (m *metricsFS) Type() FilesystemType {
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defer m.account(metricOpType)(-1)
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return m.next.Type()
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}
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func (m *metricsFS) URI() string {
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defer m.account(metricOpURI)(-1)
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return m.next.URI()
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}
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func (m *metricsFS) Options() []Option {
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defer m.account(metricOpOptions)(-1)
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return m.next.Options()
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}
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func (m *metricsFS) SameFile(fi1, fi2 FileInfo) bool {
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defer m.account(metricOpSameFile)(-1)
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return m.next.SameFile(fi1, fi2)
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}
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func (m *metricsFS) PlatformData(name string, withOwnership, withXattrs bool, xattrFilter XattrFilter) (protocol.PlatformData, error) {
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defer m.account(metricOpPlatformData)(-1)
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return m.next.PlatformData(name, withOwnership, withXattrs, xattrFilter)
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}
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func (m *metricsFS) GetXattr(name string, xattrFilter XattrFilter) ([]protocol.Xattr, error) {
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defer m.account(metricOpGetXattr)(-1)
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return m.next.GetXattr(name, xattrFilter)
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}
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func (m *metricsFS) SetXattr(path string, xattrs []protocol.Xattr, xattrFilter XattrFilter) error {
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defer m.account(metricOpSetXattr)(-1)
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return m.next.SetXattr(path, xattrs, xattrFilter)
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}
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func (m *metricsFS) underlying() (Filesystem, bool) {
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return m.next, true
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}
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func (m *metricsFS) wrapperType() filesystemWrapperType {
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return filesystemWrapperTypeMetrics
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}
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type metricsFile struct {
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fs *metricsFS
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next File
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}
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func (m *metricsFile) Read(p []byte) (n int, err error) {
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acc := m.fs.account(metricOpRead)
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defer func() { acc(n) }()
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return m.next.Read(p)
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}
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func (m *metricsFile) ReadAt(p []byte, off int64) (n int, err error) {
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acc := m.fs.account(metricOpReadAt)
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defer func() { acc(n) }()
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return m.next.ReadAt(p, off)
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}
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func (m *metricsFile) Seek(offset int64, whence int) (int64, error) {
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defer m.fs.account(metricOpSeek)(-1)
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return m.next.Seek(offset, whence)
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}
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func (m *metricsFile) Stat() (FileInfo, error) {
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defer m.fs.account(metricOpStat)(-1)
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return m.next.Stat()
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}
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func (m *metricsFile) Sync() error {
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defer m.fs.account(metricOpSync)(-1)
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return m.next.Sync()
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}
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func (m *metricsFile) Truncate(size int64) error {
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defer m.fs.account(metricOpTruncate)(-1)
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return m.next.Truncate(size)
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}
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func (m *metricsFile) Write(p []byte) (n int, err error) {
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acc := m.fs.account(metricOpWrite)
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defer func() { acc(n) }()
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return m.next.Write(p)
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}
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func (m *metricsFile) WriteAt(p []byte, off int64) (n int, err error) {
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acc := m.fs.account(metricOpWriteAt)
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defer func() { acc(n) }()
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return m.next.WriteAt(p, off)
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}
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func (m *metricsFile) Close() error {
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defer m.fs.account(metricOpClose)(-1)
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return m.next.Close()
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}
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func (m *metricsFile) Name() string {
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defer m.fs.account(metricOpName)(-1)
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return m.next.Name()
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}
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func (m *metricsFile) unwrap() File {
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return m.next
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}
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