mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
337 lines
8.6 KiB
Go
337 lines
8.6 KiB
Go
package graphtest // import "github.com/docker/docker/daemon/graphdriver/graphtest"
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import (
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"bytes"
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"fmt"
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"math/rand"
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"os"
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"sort"
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"github.com/containerd/continuity/driver"
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"github.com/docker/docker/daemon/graphdriver"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/stringid"
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)
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func randomContent(size int, seed int64) []byte {
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s := rand.NewSource(seed)
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content := make([]byte, size)
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for i := 0; i < len(content); i += 7 {
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val := s.Int63()
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for j := 0; i+j < len(content) && j < 7; j++ {
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content[i+j] = byte(val)
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val >>= 8
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}
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}
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return content
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}
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func addFiles(drv graphdriver.Driver, layer string, seed int64) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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if err := driver.WriteFile(root, root.Join(root.Path(), "file-a"), randomContent(64, seed), 0755); err != nil {
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return err
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}
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if err := root.MkdirAll(root.Join(root.Path(), "dir-b"), 0755); err != nil {
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return err
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}
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if err := driver.WriteFile(root, root.Join(root.Path(), "dir-b", "file-b"), randomContent(128, seed+1), 0755); err != nil {
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return err
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}
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return driver.WriteFile(root, root.Join(root.Path(), "file-c"), randomContent(128*128, seed+2), 0755)
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}
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func checkFile(drv graphdriver.Driver, layer, filename string, content []byte) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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fileContent, err := driver.ReadFile(root, root.Join(root.Path(), filename))
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if err != nil {
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return err
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}
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if !bytes.Equal(fileContent, content) {
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return fmt.Errorf("mismatched file content %v, expecting %v", fileContent, content)
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}
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return nil
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}
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func addFile(drv graphdriver.Driver, layer, filename string, content []byte) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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return driver.WriteFile(root, root.Join(root.Path(), filename), content, 0755)
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}
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func addDirectory(drv graphdriver.Driver, layer, dir string) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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return root.MkdirAll(root.Join(root.Path(), dir), 0755)
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}
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func removeAll(drv graphdriver.Driver, layer string, names ...string) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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for _, filename := range names {
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if err := root.RemoveAll(root.Join(root.Path(), filename)); err != nil {
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return err
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}
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}
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return nil
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}
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func checkFileRemoved(drv graphdriver.Driver, layer, filename string) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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if _, err := root.Stat(root.Join(root.Path(), filename)); err == nil {
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return fmt.Errorf("file still exists: %s", root.Join(root.Path(), filename))
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} else if !os.IsNotExist(err) {
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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 addManyFiles(drv graphdriver.Driver, layer string, count int, seed int64) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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for i := 0; i < count; i += 100 {
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dir := root.Join(root.Path(), fmt.Sprintf("directory-%d", i))
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if err := root.MkdirAll(dir, 0755); err != nil {
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return err
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}
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for j := 0; i+j < count && j < 100; j++ {
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file := root.Join(dir, fmt.Sprintf("file-%d", i+j))
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if err := driver.WriteFile(root, file, randomContent(64, seed+int64(i+j)), 0755); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func changeManyFiles(drv graphdriver.Driver, layer string, count int, seed int64) ([]archive.Change, error) {
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root, err := drv.Get(layer, "")
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if err != nil {
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return nil, err
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}
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defer drv.Put(layer)
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changes := []archive.Change{}
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for i := 0; i < count; i += 100 {
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archiveRoot := fmt.Sprintf("/directory-%d", i)
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if err := root.MkdirAll(root.Join(root.Path(), archiveRoot), 0755); err != nil {
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return nil, err
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}
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for j := 0; i+j < count && j < 100; j++ {
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if j == 0 {
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changes = append(changes, archive.Change{
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Path: archiveRoot,
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Kind: archive.ChangeModify,
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})
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}
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var change archive.Change
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switch j % 3 {
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// Update file
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case 0:
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change.Path = root.Join(archiveRoot, fmt.Sprintf("file-%d", i+j))
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change.Kind = archive.ChangeModify
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if err := driver.WriteFile(root, root.Join(root.Path(), change.Path), randomContent(64, seed+int64(i+j)), 0755); err != nil {
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return nil, err
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}
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// Add file
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case 1:
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change.Path = root.Join(archiveRoot, fmt.Sprintf("file-%d-%d", seed, i+j))
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change.Kind = archive.ChangeAdd
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if err := driver.WriteFile(root, root.Join(root.Path(), change.Path), randomContent(64, seed+int64(i+j)), 0755); err != nil {
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return nil, err
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}
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// Remove file
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case 2:
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change.Path = root.Join(archiveRoot, fmt.Sprintf("file-%d", i+j))
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change.Kind = archive.ChangeDelete
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if err := root.Remove(root.Join(root.Path(), change.Path)); err != nil {
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return nil, err
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}
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}
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changes = append(changes, change)
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}
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}
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return changes, nil
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}
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func checkManyFiles(drv graphdriver.Driver, layer string, count int, seed int64) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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for i := 0; i < count; i += 100 {
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dir := root.Join(root.Path(), fmt.Sprintf("directory-%d", i))
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for j := 0; i+j < count && j < 100; j++ {
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file := root.Join(dir, fmt.Sprintf("file-%d", i+j))
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fileContent, err := driver.ReadFile(root, file)
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if err != nil {
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return err
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}
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content := randomContent(64, seed+int64(i+j))
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if !bytes.Equal(fileContent, content) {
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return fmt.Errorf("mismatched file content %v, expecting %v", fileContent, content)
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}
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}
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}
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return nil
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}
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type changeList []archive.Change
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func (c changeList) Less(i, j int) bool {
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if c[i].Path == c[j].Path {
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return c[i].Kind < c[j].Kind
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}
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return c[i].Path < c[j].Path
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}
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func (c changeList) Len() int { return len(c) }
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func (c changeList) Swap(i, j int) { c[j], c[i] = c[i], c[j] }
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func checkChanges(expected, actual []archive.Change) error {
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if len(expected) != len(actual) {
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return fmt.Errorf("unexpected number of changes, expected %d, got %d", len(expected), len(actual))
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}
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sort.Sort(changeList(expected))
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sort.Sort(changeList(actual))
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for i := range expected {
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if expected[i] != actual[i] {
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return fmt.Errorf("unexpected change, expecting %v, got %v", expected[i], actual[i])
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}
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}
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return nil
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}
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func addLayerFiles(drv graphdriver.Driver, layer, parent string, i int) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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if err := driver.WriteFile(root, root.Join(root.Path(), "top-id"), []byte(layer), 0755); err != nil {
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return err
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}
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layerDir := root.Join(root.Path(), fmt.Sprintf("layer-%d", i))
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if err := root.MkdirAll(layerDir, 0755); err != nil {
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return err
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}
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if err := driver.WriteFile(root, root.Join(layerDir, "layer-id"), []byte(layer), 0755); err != nil {
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return err
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}
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return driver.WriteFile(root, root.Join(layerDir, "parent-id"), []byte(parent), 0755)
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}
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func addManyLayers(drv graphdriver.Driver, baseLayer string, count int) (string, error) {
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lastLayer := baseLayer
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for i := 1; i <= count; i++ {
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nextLayer := stringid.GenerateRandomID()
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if err := drv.Create(nextLayer, lastLayer, nil); err != nil {
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return "", err
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}
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if err := addLayerFiles(drv, nextLayer, lastLayer, i); err != nil {
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return "", err
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}
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lastLayer = nextLayer
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}
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return lastLayer, nil
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}
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func checkManyLayers(drv graphdriver.Driver, layer string, count int) error {
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root, err := drv.Get(layer, "")
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if err != nil {
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return err
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}
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defer drv.Put(layer)
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layerIDBytes, err := driver.ReadFile(root, root.Join(root.Path(), "top-id"))
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if err != nil {
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return err
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}
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if !bytes.Equal(layerIDBytes, []byte(layer)) {
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return fmt.Errorf("mismatched file content %v, expecting %v", layerIDBytes, []byte(layer))
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}
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for i := count; i > 0; i-- {
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layerDir := root.Join(root.Path(), fmt.Sprintf("layer-%d", i))
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thisLayerIDBytes, err := driver.ReadFile(root, root.Join(layerDir, "layer-id"))
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if err != nil {
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return err
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}
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if !bytes.Equal(thisLayerIDBytes, layerIDBytes) {
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return fmt.Errorf("mismatched file content %v, expecting %v", thisLayerIDBytes, layerIDBytes)
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}
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layerIDBytes, err = driver.ReadFile(root, root.Join(layerDir, "parent-id"))
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if err != nil {
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return err
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}
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}
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return nil
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}
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// readDir reads a directory just like driver.ReadDir()
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// then hides specific files (currently "lost+found")
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// so the tests don't "see" it
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func readDir(r driver.Driver, dir string) ([]os.FileInfo, error) {
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a, err := driver.ReadDir(r, dir)
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if err != nil {
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return nil, err
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}
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b := a[:0]
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for _, x := range a {
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if x.Name() != "lost+found" { // ext4 always have this dir
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b = append(b, x)
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}
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}
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return b, nil
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}
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