mirror of
https://github.com/restic/restic.git
synced 2024-12-23 16:26:11 +00:00
600 lines
11 KiB
Go
600 lines
11 KiB
Go
package pipe_test
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import (
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"context"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/restic/restic/internal/debug"
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"github.com/restic/restic/internal/pipe"
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. "github.com/restic/restic/internal/test"
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)
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type stats struct {
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dirs, files int
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}
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func acceptAll(string, os.FileInfo) bool {
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return true
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}
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func statPath(path string) (stats, error) {
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var s stats
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// count files and directories with filepath.Walk()
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err := filepath.Walk(TestWalkerPath, func(p string, fi os.FileInfo, err error) error {
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if fi == nil {
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return err
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}
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if fi.IsDir() {
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s.dirs++
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} else {
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s.files++
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}
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return err
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})
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return s, err
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}
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const maxWorkers = 100
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func TestPipelineWalkerWithSplit(t *testing.T) {
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if TestWalkerPath == "" {
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t.Skipf("walkerpath not set, skipping TestPipelineWalker")
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}
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var err error
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if !filepath.IsAbs(TestWalkerPath) {
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TestWalkerPath, err = filepath.Abs(TestWalkerPath)
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OK(t, err)
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}
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before, err := statPath(TestWalkerPath)
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OK(t, err)
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t.Logf("walking path %s with %d dirs, %d files", TestWalkerPath,
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before.dirs, before.files)
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// account for top level dir
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before.dirs++
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after := stats{}
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m := sync.Mutex{}
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worker := func(wg *sync.WaitGroup, done <-chan struct{}, entCh <-chan pipe.Entry, dirCh <-chan pipe.Dir) {
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defer wg.Done()
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for {
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select {
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case e, ok := <-entCh:
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if !ok {
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// channel is closed
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return
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}
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m.Lock()
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after.files++
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m.Unlock()
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e.Result() <- true
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case dir, ok := <-dirCh:
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if !ok {
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// channel is closed
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return
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}
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// wait for all content
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for _, ch := range dir.Entries {
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<-ch
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}
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m.Lock()
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after.dirs++
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m.Unlock()
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dir.Result() <- true
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case <-done:
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// pipeline was cancelled
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return
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}
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}
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}
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var wg sync.WaitGroup
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done := make(chan struct{})
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entCh := make(chan pipe.Entry)
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dirCh := make(chan pipe.Dir)
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for i := 0; i < maxWorkers; i++ {
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wg.Add(1)
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go worker(&wg, done, entCh, dirCh)
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}
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jobs := make(chan pipe.Job, 200)
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wg.Add(1)
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go func() {
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pipe.Split(jobs, dirCh, entCh)
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close(entCh)
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close(dirCh)
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wg.Done()
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}()
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resCh := make(chan pipe.Result, 1)
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pipe.Walk(context.TODO(), []string{TestWalkerPath}, acceptAll, jobs, resCh)
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// wait for all workers to terminate
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wg.Wait()
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// wait for top-level blob
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<-resCh
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t.Logf("walked path %s with %d dirs, %d files", TestWalkerPath,
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after.dirs, after.files)
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Assert(t, before == after, "stats do not match, expected %v, got %v", before, after)
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}
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func TestPipelineWalker(t *testing.T) {
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if TestWalkerPath == "" {
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t.Skipf("walkerpath not set, skipping TestPipelineWalker")
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}
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ctx, cancel := context.WithCancel(context.TODO())
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defer cancel()
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var err error
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if !filepath.IsAbs(TestWalkerPath) {
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TestWalkerPath, err = filepath.Abs(TestWalkerPath)
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OK(t, err)
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}
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before, err := statPath(TestWalkerPath)
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OK(t, err)
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t.Logf("walking path %s with %d dirs, %d files", TestWalkerPath,
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before.dirs, before.files)
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// account for top level dir
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before.dirs++
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after := stats{}
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m := sync.Mutex{}
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worker := func(ctx context.Context, wg *sync.WaitGroup, jobs <-chan pipe.Job) {
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defer wg.Done()
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for {
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select {
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case job, ok := <-jobs:
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if !ok {
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// channel is closed
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return
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}
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Assert(t, job != nil, "job is nil")
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switch j := job.(type) {
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case pipe.Dir:
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// wait for all content
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for _, ch := range j.Entries {
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<-ch
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}
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m.Lock()
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after.dirs++
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m.Unlock()
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j.Result() <- true
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case pipe.Entry:
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m.Lock()
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after.files++
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m.Unlock()
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j.Result() <- true
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}
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case <-ctx.Done():
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// pipeline was cancelled
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return
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}
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}
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}
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var wg sync.WaitGroup
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jobs := make(chan pipe.Job)
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for i := 0; i < maxWorkers; i++ {
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wg.Add(1)
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go worker(ctx, &wg, jobs)
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}
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resCh := make(chan pipe.Result, 1)
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pipe.Walk(ctx, []string{TestWalkerPath}, acceptAll, jobs, resCh)
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// wait for all workers to terminate
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wg.Wait()
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// wait for top-level blob
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<-resCh
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t.Logf("walked path %s with %d dirs, %d files", TestWalkerPath,
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after.dirs, after.files)
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Assert(t, before == after, "stats do not match, expected %v, got %v", before, after)
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}
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func createFile(filename, data string) error {
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f, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = f.Write([]byte(data))
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if err != nil {
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return err
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}
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return nil
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}
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func TestPipeWalkerError(t *testing.T) {
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dir, err := ioutil.TempDir("", "restic-test-")
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OK(t, err)
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base := filepath.Base(dir)
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var testjobs = []struct {
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path []string
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err bool
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}{
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{[]string{base, "a", "file_a"}, false},
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{[]string{base, "a"}, false},
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{[]string{base, "b"}, true},
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{[]string{base, "c", "file_c"}, false},
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{[]string{base, "c"}, false},
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{[]string{base}, false},
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{[]string{}, false},
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}
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OK(t, os.Mkdir(filepath.Join(dir, "a"), 0755))
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OK(t, os.Mkdir(filepath.Join(dir, "b"), 0755))
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OK(t, os.Mkdir(filepath.Join(dir, "c"), 0755))
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OK(t, createFile(filepath.Join(dir, "a", "file_a"), "file a"))
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OK(t, createFile(filepath.Join(dir, "b", "file_b"), "file b"))
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OK(t, createFile(filepath.Join(dir, "c", "file_c"), "file c"))
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ranHook := false
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testdir := filepath.Join(dir, "b")
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// install hook that removes the dir right before readdirnames()
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debug.Hook("pipe.readdirnames", func(context interface{}) {
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path := context.(string)
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if path != testdir {
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return
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}
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t.Logf("in hook, removing test file %v", testdir)
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ranHook = true
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OK(t, os.RemoveAll(testdir))
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})
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ctx, cancel := context.WithCancel(context.TODO())
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ch := make(chan pipe.Job)
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resCh := make(chan pipe.Result, 1)
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go pipe.Walk(ctx, []string{dir}, acceptAll, ch, resCh)
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i := 0
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for job := range ch {
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if i == len(testjobs) {
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t.Errorf("too many jobs received")
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break
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}
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p := filepath.Join(testjobs[i].path...)
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if p != job.Path() {
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t.Errorf("job %d has wrong path: expected %q, got %q", i, p, job.Path())
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}
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if testjobs[i].err {
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if job.Error() == nil {
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t.Errorf("job %d expected error but got nil", i)
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}
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} else {
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if job.Error() != nil {
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t.Errorf("job %d expected no error but got %v", i, job.Error())
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}
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}
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i++
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}
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if i != len(testjobs) {
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t.Errorf("expected %d jobs, got %d", len(testjobs), i)
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}
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cancel()
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Assert(t, ranHook, "hook did not run")
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OK(t, os.RemoveAll(dir))
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}
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func BenchmarkPipelineWalker(b *testing.B) {
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if TestWalkerPath == "" {
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b.Skipf("walkerpath not set, skipping BenchPipelineWalker")
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}
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var max time.Duration
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m := sync.Mutex{}
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fileWorker := func(ctx context.Context, wg *sync.WaitGroup, ch <-chan pipe.Entry) {
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defer wg.Done()
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for {
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select {
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case e, ok := <-ch:
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if !ok {
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// channel is closed
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return
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}
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// simulate backup
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//time.Sleep(10 * time.Millisecond)
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e.Result() <- true
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case <-ctx.Done():
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// pipeline was cancelled
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return
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}
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}
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}
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dirWorker := func(ctx context.Context, wg *sync.WaitGroup, ch <-chan pipe.Dir) {
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defer wg.Done()
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for {
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select {
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case dir, ok := <-ch:
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if !ok {
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// channel is closed
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return
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}
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start := time.Now()
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// wait for all content
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for _, ch := range dir.Entries {
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<-ch
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}
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d := time.Since(start)
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m.Lock()
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if d > max {
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max = d
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}
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m.Unlock()
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dir.Result() <- true
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case <-ctx.Done():
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// pipeline was cancelled
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return
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}
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}
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}
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ctx, cancel := context.WithCancel(context.TODO())
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defer cancel()
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for i := 0; i < b.N; i++ {
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max = 0
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entCh := make(chan pipe.Entry, 200)
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dirCh := make(chan pipe.Dir, 200)
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var wg sync.WaitGroup
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b.Logf("starting %d workers", maxWorkers)
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for i := 0; i < maxWorkers; i++ {
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wg.Add(2)
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go dirWorker(ctx, &wg, dirCh)
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go fileWorker(ctx, &wg, entCh)
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}
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jobs := make(chan pipe.Job, 200)
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wg.Add(1)
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go func() {
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pipe.Split(jobs, dirCh, entCh)
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close(entCh)
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close(dirCh)
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wg.Done()
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}()
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resCh := make(chan pipe.Result, 1)
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pipe.Walk(ctx, []string{TestWalkerPath}, acceptAll, jobs, resCh)
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// wait for all workers to terminate
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wg.Wait()
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// wait for final result
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<-resCh
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b.Logf("max duration for a dir: %v", max)
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}
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}
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func TestPipelineWalkerMultiple(t *testing.T) {
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if TestWalkerPath == "" {
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t.Skipf("walkerpath not set, skipping TestPipelineWalker")
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}
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ctx, cancel := context.WithCancel(context.TODO())
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defer cancel()
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paths, err := filepath.Glob(filepath.Join(TestWalkerPath, "*"))
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OK(t, err)
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before, err := statPath(TestWalkerPath)
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OK(t, err)
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t.Logf("walking paths %v with %d dirs, %d files", paths,
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before.dirs, before.files)
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after := stats{}
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m := sync.Mutex{}
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worker := func(ctx context.Context, wg *sync.WaitGroup, jobs <-chan pipe.Job) {
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defer wg.Done()
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for {
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select {
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case job, ok := <-jobs:
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if !ok {
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// channel is closed
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return
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}
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Assert(t, job != nil, "job is nil")
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switch j := job.(type) {
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case pipe.Dir:
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// wait for all content
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for _, ch := range j.Entries {
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<-ch
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}
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m.Lock()
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after.dirs++
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m.Unlock()
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j.Result() <- true
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case pipe.Entry:
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m.Lock()
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after.files++
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m.Unlock()
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j.Result() <- true
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}
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case <-ctx.Done():
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// pipeline was cancelled
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return
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}
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}
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}
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var wg sync.WaitGroup
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jobs := make(chan pipe.Job)
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for i := 0; i < maxWorkers; i++ {
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wg.Add(1)
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go worker(ctx, &wg, jobs)
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}
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resCh := make(chan pipe.Result, 1)
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pipe.Walk(ctx, paths, acceptAll, jobs, resCh)
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// wait for all workers to terminate
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wg.Wait()
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// wait for top-level blob
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<-resCh
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t.Logf("walked %d paths with %d dirs, %d files", len(paths), after.dirs, after.files)
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Assert(t, before == after, "stats do not match, expected %v, got %v", before, after)
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}
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func dirsInPath(path string) int {
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if path == "/" || path == "." || path == "" {
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return 0
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}
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n := 0
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for dir := path; dir != "/" && dir != "."; dir = filepath.Dir(dir) {
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n++
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}
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return n
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}
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func TestPipeWalkerRoot(t *testing.T) {
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if runtime.GOOS == "windows" {
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t.Skipf("not running TestPipeWalkerRoot on %s", runtime.GOOS)
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return
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}
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cwd, err := os.Getwd()
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OK(t, err)
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testPaths := []string{
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string(filepath.Separator),
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".",
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cwd,
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}
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for _, path := range testPaths {
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testPipeWalkerRootWithPath(path, t)
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}
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}
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func testPipeWalkerRootWithPath(path string, t *testing.T) {
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pattern := filepath.Join(path, "*")
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rootPaths, err := filepath.Glob(pattern)
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OK(t, err)
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for i, p := range rootPaths {
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rootPaths[i], err = filepath.Rel(path, p)
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OK(t, err)
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}
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t.Logf("paths in %v (pattern %q) expanded to %v items", path, pattern, len(rootPaths))
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jobCh := make(chan pipe.Job)
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var jobs []pipe.Job
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worker := func(wg *sync.WaitGroup) {
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defer wg.Done()
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for job := range jobCh {
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jobs = append(jobs, job)
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}
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}
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var wg sync.WaitGroup
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wg.Add(1)
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go worker(&wg)
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filter := func(p string, fi os.FileInfo) bool {
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p, err := filepath.Rel(path, p)
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OK(t, err)
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return dirsInPath(p) <= 1
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}
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resCh := make(chan pipe.Result, 1)
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pipe.Walk(context.TODO(), []string{path}, filter, jobCh, resCh)
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wg.Wait()
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t.Logf("received %d jobs", len(jobs))
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for i, job := range jobs[:len(jobs)-1] {
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path := job.Path()
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if path == "." || path == ".." || path == string(filepath.Separator) {
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t.Errorf("job %v has invalid path %q", i, path)
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}
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}
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lastPath := jobs[len(jobs)-1].Path()
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if lastPath != "" {
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t.Errorf("last job has non-empty path %q", lastPath)
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}
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if len(jobs) < len(rootPaths) {
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t.Errorf("want at least %v jobs, got %v for path %v\n", len(rootPaths), len(jobs), path)
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}
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}
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