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Code Issues Releases Wiki Activity

Merge pull request #898 from restic/prepare-cloud-backends

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Prepare more cloud backends, add backend layouts
This commit is contained in:
Alexander Neumann 2017-04-15 11:30:25 +02:00
commit 525db875b0
38 changed files with 1791 additions and 562 deletions
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88
doc/Design.md
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@ -34,20 +34,14 @@ in a repository are only written once and never modified afterwards. This
allows accessing and even writing to the repository with multiple clients in
parallel. Only the delete operation removes data from the repository.
At the time of writing, the only implemented repository type is based on
directories and files. Such repositories can be accessed locally on the same
system or via the integrated SFTP client (or any other storage back end).
The directory layout is the same for both access methods.
This repository type is described in the following section.
Repositories consist of several directories and a file called `config`. For
all other files stored in the repository, the name for the file is the lower
case hexadecimal representation of the storage ID, which is the SHA-256 hash of
the file's contents. This allows for easy verification of files for accidental
modifications, like disk read errors, by simply running the program `sha256sum`
and comparing its output to the file name. If the prefix of a filename is
unique amongst all the other files in the same directory, the prefix may be
used instead of the complete filename.
Repositories consist of several directories and a top-level file called
`config`. For all other files stored in the repository, the name for the file
is the lower case hexadecimal representation of the storage ID, which is the
SHA-256 hash of the file's contents. This allows for easy verification of files
for accidental modifications, like disk read errors, by simply running the
program `sha256sum` on the file and comparing its output to the file name. If
the prefix of a filename is unique amongst all the other files in the same
directory, the prefix may be used instead of the complete filename.
Apart from the files stored within the `keys` directory, all files are encrypted
with AES-256 in counter mode (CTR). The integrity of the encrypted data is
@ -78,7 +72,15 @@ regardless if it is accessed via SFTP or locally. The field
`chunker_polynomial` contains a parameter that is used for splitting large
files into smaller chunks (see below).
The basic layout of a sample restic repository is shown here:
Filesystem-Based Repositories
-----------------------------
The `local` and `sftp` backends are implemented using files and directories
stored in a file system. The directory layout is the same for both backend
types.
The basic layout of a repository stored in a `local` or `sftp` backend is shown
here:
/tmp/restic-repo
├── config
@ -102,12 +104,66 @@ The basic layout of a sample restic repository is shown here:
│ └── 22a5af1bdc6e616f8a29579458c49627e01b32210d09adb288d1ecda7c5711ec
└── tmp
A repository can be initialized with the `restic init` command, e.g.:
A local repository can be initialized with the `restic init` command, e.g.:
```console
$ restic -r /tmp/restic-repo init
```
The local and sftp backends will also accept the repository layout described in
the following section, so that remote repositories mounted locally e.g. via
fuse can be accessed. The layout auto-detection can be overridden by specifying
the option `-o local.layout=default`, valid values are `default`, `cloud` and
`s3`. The option for the sftp backend is named `sftp.layout`.
Object-Storage-Based Repositories
---------------------------------
Repositories in a backend based on an object store (e.g. Amazon s3) have the
same basic layout, with the exception that all data pack files are directly
saved in the `data` path, without the sub-directories listed for the
filesystem-based backends as listed in the previous section. The layout looks
like this:
/config
/data
├── 2159dd48f8a24f33c307b750592773f8b71ff8d11452132a7b2e2a6a01611be1
├── 32ea976bc30771cebad8285cd99120ac8786f9ffd42141d452458089985043a5
├── 59fe4bcde59bd6222eba87795e35a90d82cd2f138a27b6835032b7b58173a426
├── 73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c
[...]
/index
├── c38f5fb68307c6a3e3aa945d556e325dc38f5fb68307c6a3e3aa945d556e325d
└── ca171b1b7394d90d330b265d90f506f9984043b342525f019788f97e745c71fd
/keys
└── b02de829beeb3c01a63e6b25cbd421a98fef144f03b9a02e46eff9e2ca3f0bd7
/locks
/snapshots
└── 22a5af1bdc6e616f8a29579458c49627e01b32210d09adb288d1ecda7c5711ec
Unfortunately during development the s3 backend uses slightly different paths
(directory names use singular instead of plural for `key`, `lock`, and
`snapshot` files), for s3 the repository layout looks like this:
/config
/data
├── 2159dd48f8a24f33c307b750592773f8b71ff8d11452132a7b2e2a6a01611be1
├── 32ea976bc30771cebad8285cd99120ac8786f9ffd42141d452458089985043a5
├── 59fe4bcde59bd6222eba87795e35a90d82cd2f138a27b6835032b7b58173a426
├── 73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c
[...]
/index
├── c38f5fb68307c6a3e3aa945d556e325dc38f5fb68307c6a3e3aa945d556e325d
└── ca171b1b7394d90d330b265d90f506f9984043b342525f019788f97e745c71fd
/key
└── b02de829beeb3c01a63e6b25cbd421a98fef144f03b9a02e46eff9e2ca3f0bd7
/lock
/snapshot
└── 22a5af1bdc6e616f8a29579458c49627e01b32210d09adb288d1ecda7c5711ec
The s3 backend understands and accepts both forms, new backends are always
created with the former layout for compatibility reasons.
Pack Format
-----------

4
doc/Manual.md
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@ -551,6 +551,10 @@ Then use it in the backend specification:
$ restic -r sftp:restic-backup-host:/tmp/backup init
```
Last, if you'd like to use an entirely different program to create the SFTP
connection, you can specify the command to be run with the option
`-o sftp.command="foobar"`.
# Create a REST server repository
In order to backup data to the remote server via HTTP or HTTPS protocol,

2
doc/code.css
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@ -1,4 +1,4 @@
code {
code, pre {
font-size: 90%;
}

27
src/cmds/restic/cmd_options.go Normal file
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@ -0,0 +1,27 @@
package main
import (
"fmt"
"restic/options"
"github.com/spf13/cobra"
)
var optionsCmd = &cobra.Command{
Use: "options",
Short: "print list of extended options",
Long: `
The "options" command prints a list of extended options.
`,
Hidden: true,
Run: func(cmd *cobra.Command, args []string) {
fmt.Printf("All Extended Options:\n")
for _, opt := range options.List() {
fmt.Printf(" %-15s %s\n", opt.Namespace+"."+opt.Name, opt.Text)
}
},
}
func init() {
cmdRoot.AddCommand(optionsCmd)
}

4
src/cmds/restic/global.go
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@ -388,7 +388,7 @@ func open(s string, opts options.Options) (restic.Backend, error) {
case "local":
be, err = local.Open(cfg.(local.Config))
case "sftp":
be, err = sftp.OpenWithConfig(cfg.(sftp.Config))
be, err = sftp.Open(cfg.(sftp.Config))
case "s3":
be, err = s3.Open(cfg.(s3.Config))
case "rest":
@ -422,7 +422,7 @@ func create(s string, opts options.Options) (restic.Backend, error) {
case "local":
return local.Create(cfg.(local.Config))
case "sftp":
return sftp.CreateWithConfig(cfg.(sftp.Config))
return sftp.Create(cfg.(sftp.Config))
case "s3":
return s3.Open(cfg.(s3.Config))
case "rest":

13
src/cmds/restic/global_debug.go
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@ -8,6 +8,7 @@ import (
_ "net/http/pprof"
"os"
"restic/errors"
"restic/repository"
"github.com/pkg/profile"
)
@ -16,6 +17,7 @@ var (
listenMemoryProfile string
memProfilePath string
cpuProfilePath string
insecure bool
prof interface {
Stop()
@ -27,6 +29,13 @@ func init() {
f.StringVar(&listenMemoryProfile, "listen-profile", "", "listen on this `address:port` for memory profiling")
f.StringVar(&memProfilePath, "mem-profile", "", "write memory profile to `dir`")
f.StringVar(&cpuProfilePath, "cpu-profile", "", "write cpu profile to `dir`")
f.BoolVar(&insecure, "insecure-kdf", false, "use insecure KDF settings")
}
type fakeTestingTB struct{}
func (fakeTestingTB) Logf(msg string, args ...interface{}) {
fmt.Fprintf(os.Stderr, msg, args...)
}
func runDebug() error {
@ -50,6 +59,10 @@ func runDebug() error {
prof = profile.Start(profile.Quiet, profile.CPUProfile, profile.ProfilePath(memProfilePath))
}
if insecure {
repository.TestUseLowSecurityKDFParameters(fakeTestingTB{})
}
return nil
}

2
src/cmds/restic/integration_helpers_test.go
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@ -9,6 +9,7 @@ import (
"runtime"
"testing"
"restic/options"
"restic/repository"
. "restic/test"
)
@ -199,6 +200,7 @@ func withTestEnvironment(t testing.TB, f func(*testEnvironment, GlobalOptions))
password: TestPassword,
stdout: os.Stdout,
stderr: os.Stderr,
extended: make(options.Options),
}
// always overwrite global options

41
src/cmds/restic/local_layout_test.go Normal file
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@ -0,0 +1,41 @@
package main
import (
"path/filepath"
. "restic/test"
"testing"
)
func TestRestoreLocalLayout(t *testing.T) {
withTestEnvironment(t, func(env *testEnvironment, gopts GlobalOptions) {
var tests = []struct {
filename string
layout string
}{
{"repo-layout-cloud.tar.gz", ""},
{"repo-layout-local.tar.gz", ""},
{"repo-layout-s3-old.tar.gz", ""},
{"repo-layout-cloud.tar.gz", "cloud"},
{"repo-layout-local.tar.gz", "default"},
{"repo-layout-s3-old.tar.gz", "s3"},
}
for _, test := range tests {
datafile := filepath.Join("..", "..", "restic", "backend", "testdata", test.filename)
SetupTarTestFixture(t, env.base, datafile)
gopts.extended["local.layout"] = test.layout
// check the repo
testRunCheck(t, gopts)
// restore latest snapshot
target := filepath.Join(env.base, "restore")
testRunRestoreLatest(t, gopts, target, nil, "")
RemoveAll(t, filepath.Join(env.base, "repo"))
RemoveAll(t, target)
}
})
}

221
src/restic/backend/layout.go Normal file
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@ -0,0 +1,221 @@
package backend
import (
"fmt"
"os"
"path/filepath"
"regexp"
"restic"
"restic/debug"
"restic/errors"
"restic/fs"
)
// Layout computes paths for file name storage.
type Layout interface {
Filename(restic.Handle) string
Dirname(restic.Handle) string
Basedir(restic.FileType) string
Paths() []string
}
// Filesystem is the abstraction of a file system used for a backend.
type Filesystem interface {
Join(...string) string
ReadDir(string) ([]os.FileInfo, error)
IsNotExist(error) bool
}
// ensure statically that *LocalFilesystem implements Filesystem.
var _ Filesystem = &LocalFilesystem{}
// LocalFilesystem implements Filesystem in a local path.
type LocalFilesystem struct {
}
// ReadDir returns all entries of a directory.
func (l *LocalFilesystem) ReadDir(dir string) ([]os.FileInfo, error) {
f, err := fs.Open(dir)
if err != nil {
return nil, err
}
entries, err := f.Readdir(-1)
if err != nil {
return nil, errors.Wrap(err, "Readdir")
}
err = f.Close()
if err != nil {
return nil, errors.Wrap(err, "Close")
}
return entries, nil
}
// Join combines several path components to one.
func (l *LocalFilesystem) Join(paths ...string) string {
return filepath.Join(paths...)
}
// IsNotExist returns true for errors that are caused by not existing files.
func (l *LocalFilesystem) IsNotExist(err error) bool {
return os.IsNotExist(err)
}
var backendFilenameLength = len(restic.ID{}) * 2
var backendFilename = regexp.MustCompile(fmt.Sprintf("^[a-fA-F0-9]{%d}$", backendFilenameLength))
func hasBackendFile(fs Filesystem, dir string) (bool, error) {
entries, err := fs.ReadDir(dir)
if err != nil && fs.IsNotExist(errors.Cause(err)) {
return false, nil
}
if err != nil {
return false, errors.Wrap(err, "ReadDir")
}
for _, e := range entries {
if backendFilename.MatchString(e.Name()) {
return true, nil
}
}
return false, nil
}
var dataSubdirName = regexp.MustCompile("^[a-fA-F0-9]{2}$")
func hasSubdirBackendFile(fs Filesystem, dir string) (bool, error) {
entries, err := fs.ReadDir(dir)
if err != nil && fs.IsNotExist(errors.Cause(err)) {
return false, nil
}
if err != nil {
return false, errors.Wrap(err, "ReadDir")
}
for _, subdir := range entries {
if !dataSubdirName.MatchString(subdir.Name()) {
continue
}
present, err := hasBackendFile(fs, fs.Join(dir, subdir.Name()))
if err != nil {
return false, err
}
if present {
return true, nil
}
}
return false, nil
}
// ErrLayoutDetectionFailed is returned by DetectLayout() when the layout
// cannot be detected automatically.
var ErrLayoutDetectionFailed = errors.New("auto-detecting the filesystem layout failed")
// DetectLayout tries to find out which layout is used in a local (or sftp)
// filesystem at the given path. If repo is nil, an instance of LocalFilesystem
// is used.
func DetectLayout(repo Filesystem, dir string) (Layout, error) {
debug.Log("detect layout at %v", dir)
if repo == nil {
repo = &LocalFilesystem{}
}
// key file in the "keys" dir (DefaultLayout or CloudLayout)
foundKeysFile, err := hasBackendFile(repo, repo.Join(dir, defaultLayoutPaths[restic.KeyFile]))
if err != nil {
return nil, err
}
// key file in the "key" dir (S3Layout)
foundKeyFile, err := hasBackendFile(repo, repo.Join(dir, s3LayoutPaths[restic.KeyFile]))
if err != nil {
return nil, err
}
// data file in "data" directory (S3Layout or CloudLayout)
foundDataFile, err := hasBackendFile(repo, repo.Join(dir, s3LayoutPaths[restic.DataFile]))
if err != nil {
return nil, err
}
// data file in subdir of "data" directory (DefaultLayout)
foundDataSubdirFile, err := hasSubdirBackendFile(repo, repo.Join(dir, s3LayoutPaths[restic.DataFile]))
if err != nil {
return nil, err
}
if foundKeysFile && foundDataFile && !foundKeyFile && !foundDataSubdirFile {
debug.Log("found cloud layout at %v", dir)
return &CloudLayout{
Path: dir,
Join: repo.Join,
}, nil
}
if foundKeysFile && foundDataSubdirFile && !foundKeyFile && !foundDataFile {
debug.Log("found default layout at %v", dir)
return &DefaultLayout{
Path: dir,
Join: repo.Join,
}, nil
}
if foundKeyFile && foundDataFile && !foundKeysFile && !foundDataSubdirFile {
debug.Log("found s3 layout at %v", dir)
return &S3Layout{
Path: dir,
Join: repo.Join,
}, nil
}
debug.Log("layout detection failed")
return nil, ErrLayoutDetectionFailed
}
// ParseLayout parses the config string and returns a Layout. When layout is
// the empty string, DetectLayout is used. If that fails, defaultLayout is used.
func ParseLayout(repo Filesystem, layout, defaultLayout, path string) (l Layout, err error) {
debug.Log("parse layout string %q for backend at %v", layout, path)
switch layout {
case "default":
l = &DefaultLayout{
Path: path,
Join: repo.Join,
}
case "cloud":
l = &CloudLayout{
Path: path,
Join: repo.Join,
}
case "s3":
l = &S3Layout{
Path: path,
Join: repo.Join,
}
case "":
l, err = DetectLayout(repo, path)
// use the default layout if auto detection failed
if errors.Cause(err) == ErrLayoutDetectionFailed && defaultLayout != "" {
debug.Log("error: %v, use default layout %v", defaultLayout)
return ParseLayout(repo, defaultLayout, "", path)
}
if err != nil {
return nil, err
}
debug.Log("layout detected: %v", l)
default:
return nil, errors.Errorf("unknown backend layout string %q, may be one of: default, cloud, s3", layout)
}
return l, nil
}

46
src/restic/backend/layout_cloud.go Normal file
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@ -0,0 +1,46 @@
package backend
import "restic"
// CloudLayout implements the default layout for cloud storage backends, as
// described in the Design document.
type CloudLayout struct {
URL string
Path string
Join func(...string) string
}
var cloudLayoutPaths = defaultLayoutPaths
// Dirname returns the directory path for a given file type and name.
func (l *CloudLayout) Dirname(h restic.Handle) string {
if h.Type == restic.ConfigFile {
return l.URL + l.Join(l.Path, "/")
}
return l.URL + l.Join(l.Path, "/", cloudLayoutPaths[h.Type]) + "/"
}
// Filename returns a path to a file, including its name.
func (l *CloudLayout) Filename(h restic.Handle) string {
name := h.Name
if h.Type == restic.ConfigFile {
name = "config"
}
return l.URL + l.Join(l.Path, "/", cloudLayoutPaths[h.Type], name)
}
// Paths returns all directory names
func (l *CloudLayout) Paths() (dirs []string) {
for _, p := range cloudLayoutPaths {
dirs = append(dirs, l.URL+l.Join(l.Path, p))
}
return dirs
}
// Basedir returns the base dir name for files of type t.
func (l *CloudLayout) Basedir(t restic.FileType) string {
return l.URL + l.Join(l.Path, cloudLayoutPaths[t])
}

54
src/restic/backend/layout_default.go Normal file
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@ -0,0 +1,54 @@
package backend
import "restic"
// DefaultLayout implements the default layout for local and sftp backends, as
// described in the Design document. The `data` directory has one level of
// subdirs, two characters each (taken from the first two characters of the
// file name).
type DefaultLayout struct {
Path string
Join func(...string) string
}
var defaultLayoutPaths = map[restic.FileType]string{
restic.DataFile: "data",
restic.SnapshotFile: "snapshots",
restic.IndexFile: "index",
restic.LockFile: "locks",
restic.KeyFile: "keys",
}
// Dirname returns the directory path for a given file type and name.
func (l *DefaultLayout) Dirname(h restic.Handle) string {
p := defaultLayoutPaths[h.Type]
if h.Type == restic.DataFile && len(h.Name) > 2 {
p = l.Join(p, h.Name[:2])
}
return l.Join(l.Path, p)
}
// Filename returns a path to a file, including its name.
func (l *DefaultLayout) Filename(h restic.Handle) string {
name := h.Name
if h.Type == restic.ConfigFile {
name = "config"
}
return l.Join(l.Dirname(h), name)
}
// Paths returns all directory names
func (l *DefaultLayout) Paths() (dirs []string) {
for _, p := range defaultLayoutPaths {
dirs = append(dirs, l.Join(l.Path, p))
}
return dirs
}
// Basedir returns the base dir name for type t.
func (l *DefaultLayout) Basedir(t restic.FileType) string {
return l.Join(l.Path, defaultLayoutPaths[t])
}

52
src/restic/backend/layout_s3.go Normal file
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@ -0,0 +1,52 @@
package backend
import "restic"
// S3Layout implements the old layout used for s3 cloud storage backends, as
// described in the Design document.
type S3Layout struct {
URL string
Path string
Join func(...string) string
}
var s3LayoutPaths = map[restic.FileType]string{
restic.DataFile: "data",
restic.SnapshotFile: "snapshot",
restic.IndexFile: "index",
restic.LockFile: "lock",
restic.KeyFile: "key",
}
// Dirname returns the directory path for a given file type and name.
func (l *S3Layout) Dirname(h restic.Handle) string {
if h.Type == restic.ConfigFile {
return l.URL + l.Join(l.Path, "/")
}
return l.URL + l.Join(l.Path, "/", s3LayoutPaths[h.Type]) + "/"
}
// Filename returns a path to a file, including its name.
func (l *S3Layout) Filename(h restic.Handle) string {
name := h.Name
if h.Type == restic.ConfigFile {
name = "config"
}
return l.URL + l.Join(l.Path, "/", s3LayoutPaths[h.Type], name)
}
// Paths returns all directory names
func (l *S3Layout) Paths() (dirs []string) {
for _, p := range s3LayoutPaths {
dirs = append(dirs, l.Join(l.Path, p))
}
return dirs
}
// Basedir returns the base dir name for type t.
func (l *S3Layout) Basedir(t restic.FileType) string {
return l.Join(l.Path, s3LayoutPaths[t])
}

374
src/restic/backend/layout_test.go Normal file
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@ -0,0 +1,374 @@
package backend
import (
"fmt"
"path"
"path/filepath"
"reflect"
"restic"
. "restic/test"
"sort"
"testing"
)
func TestDefaultLayout(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
restic.Handle
filename string
}{
{
restic.Handle{Type: restic.DataFile, Name: "0123456"},
filepath.Join(path, "data", "01", "0123456"),
},
{
restic.Handle{Type: restic.ConfigFile, Name: "CFG"},
filepath.Join(path, "config"),
},
{
restic.Handle{Type: restic.SnapshotFile, Name: "123456"},
filepath.Join(path, "snapshots", "123456"),
},
{
restic.Handle{Type: restic.IndexFile, Name: "123456"},
filepath.Join(path, "index", "123456"),
},
{
restic.Handle{Type: restic.LockFile, Name: "123456"},
filepath.Join(path, "locks", "123456"),
},
{
restic.Handle{Type: restic.KeyFile, Name: "123456"},
filepath.Join(path, "keys", "123456"),
},
}
l := &DefaultLayout{
Path: path,
Join: filepath.Join,
}
t.Run("Paths", func(t *testing.T) {
dirs := l.Paths()
want := []string{
filepath.Join(path, "data"),
filepath.Join(path, "snapshots"),
filepath.Join(path, "index"),
filepath.Join(path, "locks"),
filepath.Join(path, "keys"),
}
sort.Sort(sort.StringSlice(want))
sort.Sort(sort.StringSlice(dirs))
if !reflect.DeepEqual(dirs, want) {
t.Fatalf("wrong paths returned, want:\n %v\ngot:\n %v", want, dirs)
}
})
for _, test := range tests {
t.Run(fmt.Sprintf("%v/%v", test.Type, test.Handle.Name), func(t *testing.T) {
filename := l.Filename(test.Handle)
if filename != test.filename {
t.Fatalf("wrong filename, want %v, got %v", test.filename, filename)
}
})
}
}
func TestCloudLayout(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
restic.Handle
filename string
}{
{
restic.Handle{Type: restic.DataFile, Name: "0123456"},
filepath.Join(path, "data", "0123456"),
},
{
restic.Handle{Type: restic.ConfigFile, Name: "CFG"},
filepath.Join(path, "config"),
},
{
restic.Handle{Type: restic.SnapshotFile, Name: "123456"},
filepath.Join(path, "snapshots", "123456"),
},
{
restic.Handle{Type: restic.IndexFile, Name: "123456"},
filepath.Join(path, "index", "123456"),
},
{
restic.Handle{Type: restic.LockFile, Name: "123456"},
filepath.Join(path, "locks", "123456"),
},
{
restic.Handle{Type: restic.KeyFile, Name: "123456"},
filepath.Join(path, "keys", "123456"),
},
}
l := &CloudLayout{
Path: path,
Join: filepath.Join,
}
t.Run("Paths", func(t *testing.T) {
dirs := l.Paths()
want := []string{
filepath.Join(path, "data"),
filepath.Join(path, "snapshots"),
filepath.Join(path, "index"),
filepath.Join(path, "locks"),
filepath.Join(path, "keys"),
}
sort.Sort(sort.StringSlice(want))
sort.Sort(sort.StringSlice(dirs))
if !reflect.DeepEqual(dirs, want) {
t.Fatalf("wrong paths returned, want:\n %v\ngot:\n %v", want, dirs)
}
})
for _, test := range tests {
t.Run(fmt.Sprintf("%v/%v", test.Type, test.Handle.Name), func(t *testing.T) {
filename := l.Filename(test.Handle)
if filename != test.filename {
t.Fatalf("wrong filename, want %v, got %v", test.filename, filename)
}
})
}
}
func TestCloudLayoutURLs(t *testing.T) {
var tests = []struct {
l Layout
h restic.Handle
fn string
dir string
}{
{
&CloudLayout{URL: "https://hostname.foo", Path: "", Join: path.Join},
restic.Handle{Type: restic.DataFile, Name: "foobar"},
"https://hostname.foo/data/foobar",
"https://hostname.foo/data/",
},
{
&CloudLayout{URL: "https://hostname.foo:1234/prefix/repo", Path: "/", Join: path.Join},
restic.Handle{Type: restic.LockFile, Name: "foobar"},
"https://hostname.foo:1234/prefix/repo/locks/foobar",
"https://hostname.foo:1234/prefix/repo/locks/",
},
{
&CloudLayout{URL: "https://hostname.foo:1234/prefix/repo", Path: "/", Join: path.Join},
restic.Handle{Type: restic.ConfigFile, Name: "foobar"},
"https://hostname.foo:1234/prefix/repo/config",
"https://hostname.foo:1234/prefix/repo/",
},
{
&S3Layout{URL: "https://hostname.foo", Path: "/", Join: path.Join},
restic.Handle{Type: restic.DataFile, Name: "foobar"},
"https://hostname.foo/data/foobar",
"https://hostname.foo/data/",
},
{
&S3Layout{URL: "https://hostname.foo:1234/prefix/repo", Path: "", Join: path.Join},
restic.Handle{Type: restic.LockFile, Name: "foobar"},
"https://hostname.foo:1234/prefix/repo/lock/foobar",
"https://hostname.foo:1234/prefix/repo/lock/",
},
{
&S3Layout{URL: "https://hostname.foo:1234/prefix/repo", Path: "/", Join: path.Join},
restic.Handle{Type: restic.ConfigFile, Name: "foobar"},
"https://hostname.foo:1234/prefix/repo/config",
"https://hostname.foo:1234/prefix/repo/",
},
}
for _, test := range tests {
t.Run(fmt.Sprintf("%T", test.l), func(t *testing.T) {
fn := test.l.Filename(test.h)
if fn != test.fn {
t.Fatalf("wrong filename, want %v, got %v", test.fn, fn)
}
dir := test.l.Dirname(test.h)
if dir != test.dir {
t.Fatalf("wrong dirname, want %v, got %v", test.dir, dir)
}
})
}
}
func TestS3Layout(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
restic.Handle
filename string
}{
{
restic.Handle{Type: restic.DataFile, Name: "0123456"},
filepath.Join(path, "data", "0123456"),
},
{
restic.Handle{Type: restic.ConfigFile, Name: "CFG"},
filepath.Join(path, "config"),
},
{
restic.Handle{Type: restic.SnapshotFile, Name: "123456"},
filepath.Join(path, "snapshot", "123456"),
},
{
restic.Handle{Type: restic.IndexFile, Name: "123456"},
filepath.Join(path, "index", "123456"),
},
{
restic.Handle{Type: restic.LockFile, Name: "123456"},
filepath.Join(path, "lock", "123456"),
},
{
restic.Handle{Type: restic.KeyFile, Name: "123456"},
filepath.Join(path, "key", "123456"),
},
}
l := &S3Layout{
Path: path,
Join: filepath.Join,
}
t.Run("Paths", func(t *testing.T) {
dirs := l.Paths()
want := []string{
filepath.Join(path, "data"),
filepath.Join(path, "snapshot"),
filepath.Join(path, "index"),
filepath.Join(path, "lock"),
filepath.Join(path, "key"),
}
sort.Sort(sort.StringSlice(want))
sort.Sort(sort.StringSlice(dirs))
if !reflect.DeepEqual(dirs, want) {
t.Fatalf("wrong paths returned, want:\n %v\ngot:\n %v", want, dirs)
}
})
for _, test := range tests {
t.Run(fmt.Sprintf("%v/%v", test.Type, test.Handle.Name), func(t *testing.T) {
filename := l.Filename(test.Handle)
if filename != test.filename {
t.Fatalf("wrong filename, want %v, got %v", test.filename, filename)
}
})
}
}
func TestDetectLayout(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
filename string
want string
}{
{"repo-layout-local.tar.gz", "*backend.DefaultLayout"},
{"repo-layout-cloud.tar.gz", "*backend.CloudLayout"},
{"repo-layout-s3-old.tar.gz", "*backend.S3Layout"},
}
var fs = &LocalFilesystem{}
for _, test := range tests {
for _, fs := range []Filesystem{fs, nil} {
t.Run(fmt.Sprintf("%v/fs-%T", test.filename, fs), func(t *testing.T) {
SetupTarTestFixture(t, path, filepath.Join("testdata", test.filename))
layout, err := DetectLayout(fs, filepath.Join(path, "repo"))
if err != nil {
t.Fatal(err)
}
if layout == nil {
t.Fatal("wanted some layout, but detect returned nil")
}
layoutName := fmt.Sprintf("%T", layout)
if layoutName != test.want {
t.Fatalf("want layout %v, got %v", test.want, layoutName)
}
RemoveAll(t, filepath.Join(path, "repo"))
})
}
}
}
func TestParseLayout(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
layoutName string
defaultLayoutName string
want string
}{
{"default", "", "*backend.DefaultLayout"},
{"cloud", "", "*backend.CloudLayout"},
{"s3", "", "*backend.S3Layout"},
{"", "", "*backend.CloudLayout"},
}
SetupTarTestFixture(t, path, filepath.Join("testdata", "repo-layout-cloud.tar.gz"))
for _, test := range tests {
t.Run(test.layoutName, func(t *testing.T) {
layout, err := ParseLayout(&LocalFilesystem{}, test.layoutName, test.defaultLayoutName, filepath.Join(path, "repo"))
if err != nil {
t.Fatal(err)
}
if layout == nil {
t.Fatal("wanted some layout, but detect returned nil")
}
// test that the functions work (and don't panic)
_ = layout.Dirname(restic.Handle{Type: restic.DataFile})
_ = layout.Filename(restic.Handle{Type: restic.DataFile, Name: "1234"})
_ = layout.Paths()
layoutName := fmt.Sprintf("%T", layout)
if layoutName != test.want {
t.Fatalf("want layout %v, got %v", test.want, layoutName)
}
})
}
}
func TestParseLayoutInvalid(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var invalidNames = []string{
"foo", "bar", "local",
}
for _, name := range invalidNames {
t.Run(name, func(t *testing.T) {
layout, err := ParseLayout(nil, name, "", path)
if err == nil {
t.Fatalf("expected error not found for layout name %v, layout is %v", name, layout)
}
})
}
}

6
src/restic/backend/local/config.go
View File

@ -4,11 +4,17 @@ import (
"strings"
"restic/errors"
"restic/options"
)
// Config holds all information needed to open a local repository.
type Config struct {
Path string
Layout string `option:"layout" help:"use this backend directory layout (default: auto-detect)"`
}
func init() {
options.Register("local", Config{})
}
// ParseConfig parses a local backend config.

84
src/restic/backend/local/layout_test.go Normal file
View File

@ -0,0 +1,84 @@
package local
import (
"path/filepath"
"restic"
. "restic/test"
"testing"
)
func TestLayout(t *testing.T) {
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
filename string
layout string
failureExpected bool
datafiles map[string]bool
}{
{"repo-layout-local.tar.gz", "", false, map[string]bool{
"aa464e9fd598fe4202492ee317ffa728e82fa83a1de1a61996e5bd2d6651646c": false,
"fc919a3b421850f6fa66ad22ebcf91e433e79ffef25becf8aef7c7b1eca91683": false,
"c089d62788da14f8b7cbf77188305c0874906f0b73d3fce5a8869050e8d0c0e1": false,
}},
{"repo-layout-cloud.tar.gz", "", false, map[string]bool{
"fc919a3b421850f6fa66ad22ebcf91e433e79ffef25becf8aef7c7b1eca91683": false,
"c089d62788da14f8b7cbf77188305c0874906f0b73d3fce5a8869050e8d0c0e1": false,
"aa464e9fd598fe4202492ee317ffa728e82fa83a1de1a61996e5bd2d6651646c": false,
}},
{"repo-layout-s3-old.tar.gz", "", false, map[string]bool{
"fc919a3b421850f6fa66ad22ebcf91e433e79ffef25becf8aef7c7b1eca91683": false,
"c089d62788da14f8b7cbf77188305c0874906f0b73d3fce5a8869050e8d0c0e1": false,
"aa464e9fd598fe4202492ee317ffa728e82fa83a1de1a61996e5bd2d6651646c": false,
}},
}
for _, test := range tests {
t.Run(test.filename, func(t *testing.T) {
SetupTarTestFixture(t, path, filepath.Join("..", "testdata", test.filename))
repo := filepath.Join(path, "repo")
be, err := Open(Config{
Path: repo,
Layout: test.layout,
})
if err != nil {
t.Fatal(err)
}
if be == nil {
t.Fatalf("Open() returned nil but no error")
}
datafiles := make(map[string]bool)
for id := range be.List(restic.DataFile, nil) {
datafiles[id] = false
}
if len(datafiles) == 0 {
t.Errorf("List() returned zero data files")
}
for id := range test.datafiles {
if _, ok := datafiles[id]; !ok {
t.Errorf("datafile with id %v not found", id)
}
datafiles[id] = true
}
for id, v := range datafiles {
if !v {
t.Errorf("unexpected id %v found", id)
}
}
if err = be.Close(); err != nil {
t.Errorf("Close() returned error %v", err)
}
RemoveAll(t, filepath.Join(path, "repo"))
})
}
}

225
src/restic/backend/local/local.go
View File

@ -2,7 +2,6 @@ package local
import (
"io"
"io/ioutil"
"os"
"path/filepath"
"restic"
@ -17,53 +16,64 @@ import (
// Local is a backend in a local directory.
type Local struct {
Config
backend.Layout
}
// ensure statically that *Local implements restic.Backend.
var _ restic.Backend = &Local{}
func paths(dir string) []string {
return []string{
dir,
filepath.Join(dir, backend.Paths.Data),
filepath.Join(dir, backend.Paths.Snapshots),
filepath.Join(dir, backend.Paths.Index),
filepath.Join(dir, backend.Paths.Locks),
filepath.Join(dir, backend.Paths.Keys),
filepath.Join(dir, backend.Paths.Temp),
}
}
const defaultLayout = "default"
// Open opens the local backend as specified by config.
func Open(cfg Config) (*Local, error) {
debug.Log("open local backend at %v (layout %q)", cfg.Path, cfg.Layout)
l, err := backend.ParseLayout(&backend.LocalFilesystem{}, cfg.Layout, defaultLayout, cfg.Path)
if err != nil {
return nil, err
}
be := &Local{Config: cfg, Layout: l}
// test if all necessary dirs are there
for _, d := range paths(cfg.Path) {
for _, d := range be.Paths() {
if _, err := fs.Stat(d); err != nil {
return nil, errors.Wrap(err, "Open")
}
}
return &Local{Config: cfg}, nil
return be, nil
}
// Create creates all the necessary files and directories for a new local
// backend at dir. Afterwards a new config blob should be created.
func Create(cfg Config) (*Local, error) {
debug.Log("create local backend at %v (layout %q)", cfg.Path, cfg.Layout)
l, err := backend.ParseLayout(&backend.LocalFilesystem{}, cfg.Layout, defaultLayout, cfg.Path)
if err != nil {
return nil, err
}
be := &Local{
Config: cfg,
Layout: l,
}
// test if config file already exists
_, err := fs.Lstat(filepath.Join(cfg.Path, backend.Paths.Config))
_, err = fs.Lstat(be.Filename(restic.Handle{Type: restic.ConfigFile}))
if err == nil {
return nil, errors.New("config file already exists")
}
// create paths for data, refs and temp
for _, d := range paths(cfg.Path) {
for _, d := range be.Paths() {
err := fs.MkdirAll(d, backend.Modes.Dir)
if err != nil {
return nil, errors.Wrap(err, "MkdirAll")
}
}
// open backend
return Open(cfg)
return be, nil
}
// Location returns this backend's location (the directory name).
@ -71,60 +81,6 @@ func (b *Local) Location() string {
return b.Path
}
// Construct path for given Type and name.
func filename(base string, t restic.FileType, name string) string {
if t == restic.ConfigFile {
return filepath.Join(base, "config")
}
return filepath.Join(dirname(base, t, name), name)
}
// Construct directory for given Type.
func dirname(base string, t restic.FileType, name string) string {
var n string
switch t {
case restic.DataFile:
n = backend.Paths.Data
if len(name) > 2 {
n = filepath.Join(n, name[:2])
}
case restic.SnapshotFile:
n = backend.Paths.Snapshots
case restic.IndexFile:
n = backend.Paths.Index
case restic.LockFile:
n = backend.Paths.Locks
case restic.KeyFile:
n = backend.Paths.Keys
}
return filepath.Join(base, n)
}
// copyToTempfile saves p into a tempfile in tempdir.
func copyToTempfile(tempdir string, rd io.Reader) (filename string, err error) {
tmpfile, err := ioutil.TempFile(tempdir, "temp-")
if err != nil {
return "", errors.Wrap(err, "TempFile")
}
_, err = io.Copy(tmpfile, rd)
if err != nil {
return "", errors.Wrap(err, "Write")
}
if err = tmpfile.Sync(); err != nil {
return "", errors.Wrap(err, "Syncn")
}
err = tmpfile.Close()
if err != nil {
return "", errors.Wrap(err, "Close")
}
return tmpfile.Name(), nil
}
// Save stores data in the backend at the handle.
func (b *Local) Save(h restic.Handle, rd io.Reader) (err error) {
debug.Log("Save %v", h)
@ -132,18 +88,7 @@ func (b *Local) Save(h restic.Handle, rd io.Reader) (err error) {
return err
}
tmpfile, err := copyToTempfile(filepath.Join(b.Path, backend.Paths.Temp), rd)
debug.Log("saved %v to %v", h, tmpfile)
if err != nil {
return err
}
filename := filename(b.Path, h.Type, h.Name)
// test if new path already exists
if _, err := fs.Stat(filename); err == nil {
return errors.Errorf("Rename(): file %v already exists", filename)
}
filename := b.Filename(h)
// create directories if necessary, ignore errors
if h.Type == restic.DataFile {
@ -153,12 +98,27 @@ func (b *Local) Save(h restic.Handle, rd io.Reader) (err error) {
}
}
err = fs.Rename(tmpfile, filename)
debug.Log("save %v: rename %v -> %v: %v",
h, filepath.Base(tmpfile), filepath.Base(filename), err)
// create new file
f, err := fs.OpenFile(filename, os.O_CREATE|os.O_EXCL|os.O_WRONLY, backend.Modes.File)
if err != nil {
return errors.Wrap(err, "Rename")
return errors.Wrap(err, "OpenFile")
}
// save data, then sync
_, err = io.Copy(f, rd)
if err != nil {
f.Close()
return errors.Wrap(err, "Write")
}
if err = f.Sync(); err != nil {
f.Close()
return errors.Wrap(err, "Sync")
}
err = f.Close()
if err != nil {
return errors.Wrap(err, "Close")
}
// set mode to read-only
@ -183,7 +143,7 @@ func (b *Local) Load(h restic.Handle, length int, offset int64) (io.ReadCloser,
return nil, errors.New("offset is negative")
}
f, err := os.Open(filename(b.Path, h.Type, h.Name))
f, err := fs.Open(b.Filename(h))
if err != nil {
return nil, err
}
@ -210,7 +170,7 @@ func (b *Local) Stat(h restic.Handle) (restic.FileInfo, error) {
return restic.FileInfo{}, err
}
fi, err := fs.Stat(filename(b.Path, h.Type, h.Name))
fi, err := fs.Stat(b.Filename(h))
if err != nil {
return restic.FileInfo{}, errors.Wrap(err, "Stat")
}
@ -221,7 +181,7 @@ func (b *Local) Stat(h restic.Handle) (restic.FileInfo, error) {
// Test returns true if a blob of the given type and name exists in the backend.
func (b *Local) Test(h restic.Handle) (bool, error) {
debug.Log("Test %v", h)
_, err := fs.Stat(filename(b.Path, h.Type, h.Name))
_, err := fs.Stat(b.Filename(h))
if err != nil {
if os.IsNotExist(errors.Cause(err)) {
return false, nil
@ -235,7 +195,7 @@ func (b *Local) Test(h restic.Handle) (bool, error) {
// Remove removes the blob with the given name and type.
func (b *Local) Remove(h restic.Handle) error {
debug.Log("Remove %v", h)
fn := filename(b.Path, h.Type, h.Name)
fn := b.Filename(h)
// reset read-only flag
err := fs.Chmod(fn, 0666)
@ -250,91 +210,30 @@ func isFile(fi os.FileInfo) bool {
return fi.Mode()&(os.ModeType|os.ModeCharDevice) == 0
}
func readdir(d string) (fileInfos []os.FileInfo, err error) {
f, e := fs.Open(d)
if e != nil {
return nil, errors.Wrap(e, "Open")
}
defer func() {
e := f.Close()
if err == nil {
err = errors.Wrap(e, "Close")
}
}()
return f.Readdir(-1)
}
// listDir returns a list of all files in d.
func listDir(d string) (filenames []string, err error) {
fileInfos, err := readdir(d)
if err != nil {
return nil, err
}
for _, fi := range fileInfos {
if isFile(fi) {
filenames = append(filenames, fi.Name())
}
}
return filenames, nil
}
// listDirs returns a list of all files in directories within d.
func listDirs(dir string) (filenames []string, err error) {
fileInfos, err := readdir(dir)
if err != nil {
return nil, err
}
for _, fi := range fileInfos {
if !fi.IsDir() {
continue
}
files, err := listDir(filepath.Join(dir, fi.Name()))
if err != nil {
continue
}
filenames = append(filenames, files...)
}
return filenames, nil
}
// List returns a channel that yields all names of blobs of type t. A
// goroutine is started for this. If the channel done is closed, sending
// stops.
func (b *Local) List(t restic.FileType, done <-chan struct{}) <-chan string {
debug.Log("List %v", t)
lister := listDir
if t == restic.DataFile {
lister = listDirs
}
ch := make(chan string)
items, err := lister(filepath.Join(dirname(b.Path, t, "")))
if err != nil {
close(ch)
return ch
}
go func() {
defer close(ch)
for _, m := range items {
if m == "" {
continue
fs.Walk(b.Basedir(t), func(path string, fi os.FileInfo, err error) error {
if !isFile(fi) {
return err
}
select {
case ch <- m:
case ch <- filepath.Base(path):
case <-done:
return
}
return err
}
return err
})
}()
return ch

8
src/restic/backend/location/location_test.go
View File

@ -79,7 +79,7 @@ var parseTests = []struct {
Config: sftp.Config{
User: "user",
Host: "host",
Dir: "/srv/repo",
Path: "/srv/repo",
},
},
},
@ -89,7 +89,7 @@ var parseTests = []struct {
Config: sftp.Config{
User: "",
Host: "host",
Dir: "/srv/repo",
Path: "/srv/repo",
},
},
},
@ -99,7 +99,7 @@ var parseTests = []struct {
Config: sftp.Config{
User: "user",
Host: "host",
Dir: "srv/repo",
Path: "srv/repo",
},
},
},
@ -109,7 +109,7 @@ var parseTests = []struct {
Config: sftp.Config{
User: "user",
Host: "host",
Dir: "/srv/repo",
Path: "/srv/repo",
},
},
},

55
src/restic/backend/rest/rest.go
View File

@ -22,39 +22,11 @@ const connLimit = 40
// make sure the rest backend implements restic.Backend
var _ restic.Backend = &restBackend{}
// restPath returns the path to the given resource.
func restPath(url *url.URL, h restic.Handle) string {
u := *url
var dir string
switch h.Type {
case restic.ConfigFile:
dir = ""
h.Name = "config"
case restic.DataFile:
dir = backend.Paths.Data
case restic.SnapshotFile:
dir = backend.Paths.Snapshots
case restic.IndexFile:
dir = backend.Paths.Index
case restic.LockFile:
dir = backend.Paths.Locks
case restic.KeyFile:
dir = backend.Paths.Keys
default:
dir = string(h.Type)
}
u.Path = path.Join(url.Path, dir, h.Name)
return u.String()
}
type restBackend struct {
url *url.URL
connChan chan struct{}
client http.Client
backend.Layout
}
// Open opens the REST backend with the given config.
@ -66,7 +38,20 @@ func Open(cfg Config) (restic.Backend, error) {
tr := &http.Transport{MaxIdleConnsPerHost: connLimit}
client := http.Client{Transport: tr}
return &restBackend{url: cfg.URL, connChan: connChan, client: client}, nil
// use url without trailing slash for layout
url := cfg.URL.String()
if url[len(url)-1] == '/' {
url = url[:len(url)-1]
}
be := &restBackend{
url: cfg.URL,
connChan: connChan,
client: client,
Layout: &backend.CloudLayout{URL: url, Join: path.Join},
}
return be, nil
}
// Create creates a new REST on server configured in config.
@ -124,7 +109,7 @@ func (b *restBackend) Save(h restic.Handle, rd io.Reader) (err error) {
rd = backend.Closer{Reader: rd}
<-b.connChan
resp, err := b.client.Post(restPath(b.url, h), "binary/octet-stream", rd)
resp, err := b.client.Post(b.Filename(h), "binary/octet-stream", rd)
b.connChan <- struct{}{}
if resp != nil {
@ -167,7 +152,7 @@ func (b *restBackend) Load(h restic.Handle, length int, offset int64) (io.ReadCl
return nil, errors.Errorf("invalid length %d", length)
}
req, err := http.NewRequest("GET", restPath(b.url, h), nil)
req, err := http.NewRequest("GET", b.Filename(h), nil)
if err != nil {
return nil, errors.Wrap(err, "http.NewRequest")
}
@ -207,7 +192,7 @@ func (b *restBackend) Stat(h restic.Handle) (restic.FileInfo, error) {
}
<-b.connChan
resp, err := b.client.Head(restPath(b.url, h))
resp, err := b.client.Head(b.Filename(h))
b.connChan <- struct{}{}
if err != nil {
return restic.FileInfo{}, errors.Wrap(err, "client.Head")
@ -249,7 +234,7 @@ func (b *restBackend) Remove(h restic.Handle) error {
return err
}
req, err := http.NewRequest("DELETE", restPath(b.url, h), nil)
req, err := http.NewRequest("DELETE", b.Filename(h), nil)
if err != nil {
return errors.Wrap(err, "http.NewRequest")
}
@ -275,7 +260,7 @@ func (b *restBackend) Remove(h restic.Handle) error {
func (b *restBackend) List(t restic.FileType, done <-chan struct{}) <-chan string {
ch := make(chan string)
url := restPath(b.url, restic.Handle{Type: t})
url := b.Dirname(restic.Handle{Type: t})
if !strings.HasSuffix(url, "/") {
url += "/"
}

48
src/restic/backend/rest/rest_path_test.go
View File

@ -1,48 +0,0 @@
package rest
import (
"net/url"
"restic"
"testing"
)
var restPathTests = []struct {
Handle restic.Handle
URL *url.URL
Result string
}{
{
URL: parseURL("https://hostname.foo"),
Handle: restic.Handle{
Type: restic.DataFile,
Name: "foobar",
},
Result: "https://hostname.foo/data/foobar",
},
{
URL: parseURL("https://hostname.foo:1234/prefix/repo"),
Handle: restic.Handle{
Type: restic.LockFile,
Name: "foobar",
},
Result: "https://hostname.foo:1234/prefix/repo/locks/foobar",
},
{
URL: parseURL("https://hostname.foo:1234/prefix/repo"),
Handle: restic.Handle{
Type: restic.ConfigFile,
Name: "foobar",
},
Result: "https://hostname.foo:1234/prefix/repo/config",
},
}
func TestRESTPaths(t *testing.T) {
for i, test := range restPathTests {
result := restPath(test.URL, test.Handle)
if result != test.Result {
t.Errorf("test %d: resulting URL does not match, want:\n %#v\ngot: \n %#v",
i, test.Result, result)
}
}
}

21
src/restic/backend/s3/s3.go
View File

@ -27,6 +27,7 @@ type s3 struct {
prefix string
cacheMutex sync.RWMutex
cacheObjSize map[string]int64
backend.Layout
}
// Open opens the S3 backend at bucket and region. The bucket is created if it
@ -44,6 +45,7 @@ func Open(cfg Config) (restic.Backend, error) {
bucketname: cfg.Bucket,
prefix: cfg.Prefix,
cacheObjSize: make(map[string]int64),
Layout: &backend.S3Layout{URL: cfg.Endpoint, Join: path.Join},
}
tr := &http.Transport{MaxIdleConnsPerHost: connLimit}
@ -68,13 +70,6 @@ func Open(cfg Config) (restic.Backend, error) {
return be, nil
}
func (be *s3) s3path(h restic.Handle) string {
if h.Type == restic.ConfigFile {
return path.Join(be.prefix, string(h.Type))
}
return path.Join(be.prefix, string(h.Type), h.Name)
}
func (be *s3) createConnections() {
be.connChan = make(chan struct{}, connLimit)
for i := 0; i < connLimit; i++ {
@ -95,7 +90,7 @@ func (be *s3) Save(h restic.Handle, rd io.Reader) (err error) {
debug.Log("Save %v", h)
objName := be.s3path(h)
objName := be.Filename(h)
// Check key does not already exist
_, err = be.client.StatObject(be.bucketname, objName)
@ -149,7 +144,7 @@ func (be *s3) Load(h restic.Handle, length int, offset int64) (io.ReadCloser, er
var obj *minio.Object
var size int64
objName := be.s3path(h)
objName := be.Filename(h)
// get token for connection
<-be.connChan
@ -242,7 +237,7 @@ func (be *s3) Load(h restic.Handle, length int, offset int64) (io.ReadCloser, er
func (be *s3) Stat(h restic.Handle) (bi restic.FileInfo, err error) {
debug.Log("%v", h)
objName := be.s3path(h)
objName := be.Filename(h)
var obj *minio.Object
obj, err = be.client.GetObject(be.bucketname, objName)
@ -271,7 +266,7 @@ func (be *s3) Stat(h restic.Handle) (bi restic.FileInfo, err error) {
// Test returns true if a blob of the given type and name exists in the backend.
func (be *s3) Test(h restic.Handle) (bool, error) {
found := false
objName := be.s3path(h)
objName := be.Filename(h)
_, err := be.client.StatObject(be.bucketname, objName)
if err == nil {
found = true
@ -283,7 +278,7 @@ func (be *s3) Test(h restic.Handle) (bool, error) {
// Remove removes the blob with the given name and type.
func (be *s3) Remove(h restic.Handle) error {
objName := be.s3path(h)
objName := be.Filename(h)
err := be.client.RemoveObject(be.bucketname, objName)
debug.Log("Remove(%v) -> err %v", h, err)
return errors.Wrap(err, "client.RemoveObject")
@ -296,7 +291,7 @@ func (be *s3) List(t restic.FileType, done <-chan struct{}) <-chan string {
debug.Log("listing %v", t)
ch := make(chan string)
prefix := be.s3path(restic.Handle{Type: t}) + "/"
prefix := be.Dirname(restic.Handle{Type: t})
listresp := be.client.ListObjects(be.bucketname, prefix, true, done)

11
src/restic/backend/sftp/config.go
View File

@ -6,11 +6,18 @@ import (
"strings"
"restic/errors"
"restic/options"
)
// Config collects all information required to connect to an sftp server.
type Config struct {
User, Host, Dir string
User, Host, Path string
Layout string `option:"layout" help:"use this backend directory layout (default: auto-detect)"`
Command string `option:"command" help:"specify command to create sftp connection"`
}
func init() {
options.Register("sftp", Config{})
}
// ParseConfig parses the string s and extracts the sftp config. The
@ -60,6 +67,6 @@ func ParseConfig(s string) (interface{}, error) {
return Config{
User: user,
Host: host,
Dir: path.Clean(dir),
Path: path.Clean(dir),
}, nil
}

24
src/restic/backend/sftp/config_test.go
View File

@ -9,53 +9,53 @@ var configTests = []struct {
// first form, user specified sftp://user@host/dir
{
"sftp://user@host/dir/subdir",
Config{User: "user", Host: "host", Dir: "dir/subdir"},
Config{User: "user", Host: "host", Path: "dir/subdir"},
},
{
"sftp://host/dir/subdir",
Config{Host: "host", Dir: "dir/subdir"},
Config{Host: "host", Path: "dir/subdir"},
},
{
"sftp://host//dir/subdir",
Config{Host: "host", Dir: "/dir/subdir"},
Config{Host: "host", Path: "/dir/subdir"},
},
{
"sftp://host:10022//dir/subdir",
Config{Host: "host:10022", Dir: "/dir/subdir"},
Config{Host: "host:10022", Path: "/dir/subdir"},
},
{
"sftp://user@host:10022//dir/subdir",
Config{User: "user", Host: "host:10022", Dir: "/dir/subdir"},
Config{User: "user", Host: "host:10022", Path: "/dir/subdir"},
},
{
"sftp://user@host/dir/subdir/../other",
Config{User: "user", Host: "host", Dir: "dir/other"},
Config{User: "user", Host: "host", Path: "dir/other"},
},
{
"sftp://user@host/dir///subdir",
Config{User: "user", Host: "host", Dir: "dir/subdir"},
Config{User: "user", Host: "host", Path: "dir/subdir"},
},
// second form, user specified sftp:user@host:/dir
{
"sftp:user@host:/dir/subdir",
Config{User: "user", Host: "host", Dir: "/dir/subdir"},
Config{User: "user", Host: "host", Path: "/dir/subdir"},
},
{
"sftp:host:../dir/subdir",
Config{Host: "host", Dir: "../dir/subdir"},
Config{Host: "host", Path: "../dir/subdir"},
},
{
"sftp:user@host:dir/subdir:suffix",
Config{User: "user", Host: "host", Dir: "dir/subdir:suffix"},
Config{User: "user", Host: "host", Path: "dir/subdir:suffix"},
},
{
"sftp:user@host:dir/subdir/../other",
Config{User: "user", Host: "host", Dir: "dir/other"},
Config{User: "user", Host: "host", Path: "dir/other"},
},
{
"sftp:user@host:dir///subdir",
Config{User: "user", Host: "host", Dir: "dir/subdir"},
Config{User: "user", Host: "host", Path: "dir/subdir"},
},
}

91
src/restic/backend/sftp/layout_test.go Normal file
View File

@ -0,0 +1,91 @@
package sftp_test
import (
"fmt"
"path/filepath"
"restic"
"restic/backend/sftp"
. "restic/test"
"testing"
)
func TestLayout(t *testing.T) {
if sftpserver == "" {
t.Skip("sftp server binary not available")
}
path, cleanup := TempDir(t)
defer cleanup()
var tests = []struct {
filename string
layout string
failureExpected bool
datafiles map[string]bool
}{
{"repo-layout-local.tar.gz", "", false, map[string]bool{
"aa464e9fd598fe4202492ee317ffa728e82fa83a1de1a61996e5bd2d6651646c": false,
"fc919a3b421850f6fa66ad22ebcf91e433e79ffef25becf8aef7c7b1eca91683": false,
"c089d62788da14f8b7cbf77188305c0874906f0b73d3fce5a8869050e8d0c0e1": false,
}},
{"repo-layout-cloud.tar.gz", "", false, map[string]bool{
"fc919a3b421850f6fa66ad22ebcf91e433e79ffef25becf8aef7c7b1eca91683": false,
"c089d62788da14f8b7cbf77188305c0874906f0b73d3fce5a8869050e8d0c0e1": false,
"aa464e9fd598fe4202492ee317ffa728e82fa83a1de1a61996e5bd2d6651646c": false,
}},
{"repo-layout-s3-old.tar.gz", "", false, map[string]bool{
"fc919a3b421850f6fa66ad22ebcf91e433e79ffef25becf8aef7c7b1eca91683": false,
"c089d62788da14f8b7cbf77188305c0874906f0b73d3fce5a8869050e8d0c0e1": false,
"aa464e9fd598fe4202492ee317ffa728e82fa83a1de1a61996e5bd2d6651646c": false,
}},
}
for _, test := range tests {
t.Run(test.filename, func(t *testing.T) {
SetupTarTestFixture(t, path, filepath.Join("..", "testdata", test.filename))
repo := filepath.Join(path, "repo")
be, err := sftp.Open(sftp.Config{
Command: fmt.Sprintf("%q -e", sftpserver),
Path: repo,
Layout: test.layout,
})
if err != nil {
t.Fatal(err)
}
if be == nil {
t.Fatalf("Open() returned nil but no error")
}
datafiles := make(map[string]bool)
for id := range be.List(restic.DataFile, nil) {
datafiles[id] = false
}
if len(datafiles) == 0 {
t.Errorf("List() returned zero data files")
}
for id := range test.datafiles {
if _, ok := datafiles[id]; !ok {
t.Errorf("datafile with id %v not found", id)
}
datafiles[id] = true
}
for id, v := range datafiles {
if !v {
t.Errorf("unexpected id %v found", id)
}
}
if err = be.Close(); err != nil {
t.Errorf("Close() returned error %v", err)
}
RemoveAll(t, filepath.Join(path, "repo"))
})
}
}

316
src/restic/backend/sftp/sftp.go
View File

@ -2,13 +2,12 @@ package sftp
import (
"bufio"
"crypto/rand"
"encoding/hex"
"fmt"
"io"
"os"
"os/exec"
"path"
"path/filepath"
"restic"
"strings"
"time"
@ -21,10 +20,6 @@ import (
"github.com/pkg/sftp"
)
const (
tempfileRandomSuffixLength = 10
)
// SFTP is a backend in a directory accessed via SFTP.
type SFTP struct {
c *sftp.Client
@ -32,11 +27,17 @@ type SFTP struct {
cmd *exec.Cmd
result <-chan error
backend.Layout
Config
}
var _ restic.Backend = &SFTP{}
const defaultLayout = "default"
func startClient(program string, args ...string) (*SFTP, error) {
debug.Log("start client %v %v", program, args)
// Connect to a remote host and request the sftp subsystem via the 'ssh'
// command. This assumes that passwordless login is correctly configured.
cmd := exec.Command(program, args...)
@ -89,18 +90,6 @@ func startClient(program string, args ...string) (*SFTP, error) {
return &SFTP{c: client, cmd: cmd, result: ch}, nil
}
func paths(dir string) []string {
return []string{
dir,
Join(dir, backend.Paths.Data),
Join(dir, backend.Paths.Snapshots),
Join(dir, backend.Paths.Index),
Join(dir, backend.Paths.Locks),
Join(dir, backend.Paths.Keys),
Join(dir, backend.Paths.Temp),
}
}
// clientError returns an error if the client has exited. Otherwise, nil is
// returned immediately.
func (r *SFTP) clientError() error {
@ -114,32 +103,70 @@ func (r *SFTP) clientError() error {
return nil
}
// Open opens an sftp backend. When the command is started via
// exec.Command, it is expected to speak sftp on stdin/stdout. The backend
// is expected at the given path. `dir` must be delimited by forward slashes
// ("/"), which is required by sftp.
func Open(dir string, program string, args ...string) (*SFTP, error) {
debug.Log("open backend with program %v, %v at %v", program, args, dir)
sftp, err := startClient(program, args...)
// Open opens an sftp backend as described by the config by running
// "ssh" with the appropriate arguments (or cfg.Command, if set).
func Open(cfg Config) (*SFTP, error) {
debug.Log("open backend with config %#v", cfg)
cmd, args, err := buildSSHCommand(cfg)
if err != nil {
return nil, err
}
sftp, err := startClient(cmd, args...)
if err != nil {
debug.Log("unable to start program: %v", err)
return nil, err
}
sftp.Layout, err = backend.ParseLayout(sftp, cfg.Layout, defaultLayout, cfg.Path)
if err != nil {
return nil, err
}
// test if all necessary dirs and files are there
for _, d := range paths(dir) {
for _, d := range sftp.Paths() {
if _, err := sftp.c.Lstat(d); err != nil {
return nil, errors.Errorf("%s does not exist", d)
}
}
sftp.p = dir
debug.Log("layout: %v\n", sftp.Layout)
sftp.Config = cfg
sftp.p = cfg.Path
return sftp, nil
}
func buildSSHCommand(cfg Config) []string {
// Join combines path components with slashes (according to the sftp spec).
func (r *SFTP) Join(p ...string) string {
return path.Join(p...)
}
// ReadDir returns the entries for a directory.
func (r *SFTP) ReadDir(dir string) ([]os.FileInfo, error) {
return r.c.ReadDir(dir)
}
// IsNotExist returns true if the error is caused by a not existing file.
func (r *SFTP) IsNotExist(err error) bool {
statusError, ok := err.(*sftp.StatusError)
if !ok {
return false
}
return statusError.Error() == `sftp: "No such file" (SSH_FX_NO_SUCH_FILE)`
}
func buildSSHCommand(cfg Config) (cmd string, args []string, err error) {
if cfg.Command != "" {
return SplitShellArgs(cfg.Command)
}
cmd = "ssh"
hostport := strings.Split(cfg.Host, ":")
args := []string{hostport[0]}
args = []string{hostport[0]}
if len(hostport) > 1 {
args = append(args, "-p", hostport[1])
}
@ -149,35 +176,38 @@ func buildSSHCommand(cfg Config) []string {
}
args = append(args, "-s")
args = append(args, "sftp")
return args
return cmd, args, nil
}
// OpenWithConfig opens an sftp backend as described by the config by running
// "ssh" with the appropriate arguments.
func OpenWithConfig(cfg Config) (*SFTP, error) {
debug.Log("open with config %v", cfg)
return Open(cfg.Dir, "ssh", buildSSHCommand(cfg)...)
// Create creates an sftp backend as described by the config by running
// "ssh" with the appropriate arguments (or cfg.Command, if set).
func Create(cfg Config) (*SFTP, error) {
cmd, args, err := buildSSHCommand(cfg)
if err != nil {
return nil, err
}
// Create creates all the necessary files and directories for a new sftp
// backend at dir. Afterwards a new config blob should be created. `dir` must
// be delimited by forward slashes ("/"), which is required by sftp.
func Create(dir string, program string, args ...string) (*SFTP, error) {
debug.Log("%v %v", program, args)
sftp, err := startClient(program, args...)
sftp, err := startClient(cmd, args...)
if err != nil {
debug.Log("unable to start program: %v", err)
return nil, err
}
sftp.Layout, err = backend.ParseLayout(sftp, cfg.Layout, defaultLayout, cfg.Path)
if err != nil {
return nil, err
}
// test if config file already exists
_, err = sftp.c.Lstat(Join(dir, backend.Paths.Config))
_, err = sftp.c.Lstat(Join(cfg.Path, backend.Paths.Config))
if err == nil {
return nil, errors.New("config file already exists")
}
// create paths for data, refs and temp blobs
for _, d := range paths(dir) {
for _, d := range sftp.Paths() {
err = sftp.mkdirAll(d, backend.Modes.Dir)
debug.Log("mkdirAll %v -> %v", d, err)
if err != nil {
return nil, err
}
@ -189,14 +219,7 @@ func Create(dir string, program string, args ...string) (*SFTP, error) {
}
// open backend
return Open(dir, program, args...)
}
// CreateWithConfig creates an sftp backend as described by the config by running
// "ssh" with the appropriate arguments.
func CreateWithConfig(cfg Config) (*SFTP, error) {
debug.Log("config %v", cfg)
return Create(cfg.Dir, "ssh", buildSSHCommand(cfg)...)
return Open(cfg)
}
// Location returns this backend's location (the directory name).
@ -204,28 +227,6 @@ func (r *SFTP) Location() string {
return r.p
}
// Return temp directory in correct directory for this backend.
func (r *SFTP) tempFile() (string, *sftp.File, error) {
// choose random suffix
buf := make([]byte, tempfileRandomSuffixLength)
_, err := io.ReadFull(rand.Reader, buf)
if err != nil {
return "", nil, errors.Errorf("unable to read %d random bytes for tempfile name: %v",
tempfileRandomSuffixLength, err)
}
// construct tempfile name
name := Join(r.p, backend.Paths.Temp, "temp-"+hex.EncodeToString(buf))
// create file in temp dir
f, err := r.c.Create(name)
if err != nil {
return "", nil, errors.Errorf("creating tempfile %q failed: %v", name, err)
}
return name, f, nil
}
func (r *SFTP) mkdirAll(dir string, mode os.FileMode) error {
// check if directory already exists
fi, err := r.c.Lstat(dir)
@ -258,9 +259,24 @@ func (r *SFTP) mkdirAll(dir string, mode os.FileMode) error {
return r.c.Chmod(dir, mode)
}
// Rename temp file to final name according to type and name.
func (r *SFTP) renameFile(oldname string, h restic.Handle) error {
filename := r.filename(h)
// Join joins the given paths and cleans them afterwards. This always uses
// forward slashes, which is required by sftp.
func Join(parts ...string) string {
return path.Clean(path.Join(parts...))
}
// Save stores data in the backend at the handle.
func (r *SFTP) Save(h restic.Handle, rd io.Reader) (err error) {
debug.Log("Save %v", h)
if err := r.clientError(); err != nil {
return err
}
if err := h.Valid(); err != nil {
return err
}
filename := r.Filename(h)
// create directories if necessary
if h.Type == restic.DataFile {
@ -270,14 +286,22 @@ func (r *SFTP) renameFile(oldname string, h restic.Handle) error {
}
}
// test if new file exists
if _, err := r.c.Lstat(filename); err == nil {
return errors.Errorf("Close(): file %v already exists", filename)
// create new file
f, err := r.c.OpenFile(filename, os.O_CREATE|os.O_EXCL|os.O_WRONLY)
if err != nil {
return errors.Wrap(err, "OpenFile")
}
err := r.c.Rename(oldname, filename)
// save data
_, err = io.Copy(f, rd)
if err != nil {
return errors.Wrap(err, "Rename")
f.Close()
return errors.Wrap(err, "Write")
}
err = f.Close()
if err != nil {
return errors.Wrap(err, "Close")
}
// set mode to read-only
@ -290,76 +314,6 @@ func (r *SFTP) renameFile(oldname string, h restic.Handle) error {
return errors.Wrap(err, "Chmod")
}
// Join joins the given paths and cleans them afterwards. This always uses
// forward slashes, which is required by sftp.
func Join(parts ...string) string {
return path.Clean(path.Join(parts...))
}
// Construct path for given restic.Type and name.
func (r *SFTP) filename(h restic.Handle) string {
if h.Type == restic.ConfigFile {
return Join(r.p, "config")
}
return Join(r.dirname(h), h.Name)
}
// Construct directory for given backend.Type.
func (r *SFTP) dirname(h restic.Handle) string {
var n string
switch h.Type {
case restic.DataFile:
n = backend.Paths.Data
if len(h.Name) > 2 {
n = Join(n, h.Name[:2])
}
case restic.SnapshotFile:
n = backend.Paths.Snapshots
case restic.IndexFile:
n = backend.Paths.Index
case restic.LockFile:
n = backend.Paths.Locks
case restic.KeyFile:
n = backend.Paths.Keys
}
return Join(r.p, n)
}
// Save stores data in the backend at the handle.
func (r *SFTP) Save(h restic.Handle, rd io.Reader) (err error) {
debug.Log("save to %v", h)
if err := r.clientError(); err != nil {
return err
}
if err := h.Valid(); err != nil {
return err
}
filename, tmpfile, err := r.tempFile()
if err != nil {
return err
}
n, err := io.Copy(tmpfile, rd)
if err != nil {
return errors.Wrap(err, "Write")
}
debug.Log("saved %v (%d bytes) to %v", h, n, filename)
err = tmpfile.Close()
if err != nil {
return errors.Wrap(err, "Close")
}
err = r.renameFile(filename, h)
debug.Log("save %v: rename %v: %v",
h, path.Base(filename), err)
return err
}
// Load returns a reader that yields the contents of the file at h at the
// given offset. If length is nonzero, only a portion of the file is
// returned. rd must be closed after use.
@ -373,7 +327,7 @@ func (r *SFTP) Load(h restic.Handle, length int, offset int64) (io.ReadCloser, e
return nil, errors.New("offset is negative")
}
f, err := r.c.Open(r.filename(h))
f, err := r.c.Open(r.Filename(h))
if err != nil {
return nil, err
}
@ -404,7 +358,7 @@ func (r *SFTP) Stat(h restic.Handle) (restic.FileInfo, error) {
return restic.FileInfo{}, err
}
fi, err := r.c.Lstat(r.filename(h))
fi, err := r.c.Lstat(r.Filename(h))
if err != nil {
return restic.FileInfo{}, errors.Wrap(err, "Lstat")
}
@ -419,7 +373,7 @@ func (r *SFTP) Test(h restic.Handle) (bool, error) {
return false, err
}
_, err := r.c.Lstat(r.filename(h))
_, err := r.c.Lstat(r.Filename(h))
if os.IsNotExist(errors.Cause(err)) {
return false, nil
}
@ -438,72 +392,36 @@ func (r *SFTP) Remove(h restic.Handle) error {
return err
}
return r.c.Remove(r.filename(h))
return r.c.Remove(r.Filename(h))
}
// List returns a channel that yields all names of blobs of type t. A
// goroutine is started for this. If the channel done is closed, sending
// stops.
func (r *SFTP) List(t restic.FileType, done <-chan struct{}) <-chan string {
debug.Log("list all %v", t)
debug.Log("List %v", t)
ch := make(chan string)
go func() {
defer close(ch)
if t == restic.DataFile {
// read first level
basedir := r.dirname(restic.Handle{Type: t})
list1, err := r.c.ReadDir(basedir)
if err != nil {
return
}
dirs := make([]string, 0, len(list1))
for _, d := range list1 {
dirs = append(dirs, d.Name())
}
// read files
for _, dir := range dirs {
entries, err := r.c.ReadDir(Join(basedir, dir))
if err != nil {
walker := r.c.Walk(r.Basedir(t))
for walker.Step() {
if walker.Err() != nil {
continue
}
items := make([]string, 0, len(entries))
for _, entry := range entries {
items = append(items, entry.Name())
if !walker.Stat().Mode().IsRegular() {
continue
}
for _, file := range items {
select {
case ch <- file:
case ch <- filepath.Base(walker.Path()):
case <-done:
return
}
}
}
} else {
entries, err := r.c.ReadDir(r.dirname(restic.Handle{Type: t}))
if err != nil {
return
}
items := make([]string, 0, len(entries))
for _, entry := range entries {
items = append(items, entry.Name())
}
for _, file := range items {
select {
case ch <- file:
case <-done:
return
}
}
}
}()
return ch

27
src/restic/backend/sftp/sftp_backend_test.go
View File

@ -1,6 +1,7 @@
package sftp_test
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
@ -33,24 +34,29 @@ func createTempdir() error {
return nil
}
func init() {
sftpserver := ""
func findSFTPServerBinary() string {
for _, dir := range strings.Split(TestSFTPPath, ":") {
testpath := filepath.Join(dir, "sftp-server")
_, err := os.Stat(testpath)
if !os.IsNotExist(errors.Cause(err)) {
sftpserver = testpath
break
return testpath
}
}
return ""
}
var sftpserver = findSFTPServerBinary()
func init() {
if sftpserver == "" {
SkipMessage = "sftp server binary not found, skipping tests"
return
}
args := []string{"-e"}
cfg := sftp.Config{
Command: fmt.Sprintf("%q -e", sftpserver),
}
test.CreateFn = func() (restic.Backend, error) {
err := createTempdir()
@ -58,7 +64,9 @@ func init() {
return nil, err
}
return sftp.Create(tempBackendDir, sftpserver, args...)
cfg.Path = tempBackendDir
return sftp.Create(cfg)
}
test.OpenFn = func() (restic.Backend, error) {
@ -66,7 +74,10 @@ func init() {
if err != nil {
return nil, err
}
return sftp.Open(tempBackendDir, sftpserver, args...)
cfg.Path = tempBackendDir
return sftp.Open(cfg)
}
test.CleanupFn = func() error {

77
src/restic/backend/sftp/split.go Normal file
View File

@ -0,0 +1,77 @@
package sftp
import (
"restic/errors"
"unicode"
)
// shellSplitter splits a command string into separater arguments. It supports
// single and double quoted strings.
type shellSplitter struct {
quote rune
lastChar rune
}
func (s *shellSplitter) isSplitChar(c rune) bool {
// only test for quotes if the last char was not a backslash
if s.lastChar != '\\' {
// quote ended
if s.quote != 0 && c == s.quote {
s.quote = 0
return true
}
// quote starts
if s.quote == 0 && (c == '"' || c == '\'') {
s.quote = c
return true
}
}
s.lastChar = c
// within quote
if s.quote != 0 {
return false
}
// outside quote
return c == '\\' || unicode.IsSpace(c)
}
// SplitShellArgs returns the list of arguments from a shell command string.
func SplitShellArgs(data string) (cmd string, args []string, err error) {
s := &shellSplitter{}
// derived from strings.SplitFunc
fieldStart := -1 // Set to -1 when looking for start of field.
for i, rune := range data {
if s.isSplitChar(rune) {
if fieldStart >= 0 {
args = append(args, data[fieldStart:i])
fieldStart = -1
}
} else if fieldStart == -1 {
fieldStart = i
}
}
if fieldStart >= 0 { // Last field might end at EOF.
args = append(args, data[fieldStart:])
}
switch s.quote {
case '\'':
return "", nil, errors.New("single-quoted string not terminated")
case '"':
return "", nil, errors.New("double-quoted string not terminated")
}
if len(args) == 0 {
return "", nil, errors.New("command string is empty")
}
cmd, args = args[0], args[1:]
return cmd, args, nil
}

115
src/restic/backend/sftp/split_test.go Normal file
View File

@ -0,0 +1,115 @@
package sftp
import (
"reflect"
"testing"
)
func TestShellSplitter(t *testing.T) {
var tests = []struct {
data string
cmd string
args []string
}{
{
`foo`,
"foo", []string{},
},
{
`'foo'`,
"foo", []string{},
},
{
`foo bar baz`,
"foo", []string{"bar", "baz"},
},
{
`foo 'bar' baz`,
"foo", []string{"bar", "baz"},
},
{
`'bar box' baz`,
"bar box", []string{"baz"},
},
{
`"bar 'box'" baz`,
"bar 'box'", []string{"baz"},
},
{
`'bar "box"' baz`,
`bar "box"`, []string{"baz"},
},
{
`\"bar box baz`,
`"bar`, []string{"box", "baz"},
},
{
`"bar/foo/x" "box baz"`,
"bar/foo/x", []string{"box baz"},
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
cmd, args, err := SplitShellArgs(test.data)
if err != nil {
t.Fatal(err)
}
if cmd != test.cmd {
t.Fatalf("wrong cmd returned, want:\n %#v\ngot:\n %#v",
test.cmd, cmd)
}
if !reflect.DeepEqual(args, test.args) {
t.Fatalf("wrong args returned, want:\n %#v\ngot:\n %#v",
test.args, args)
}
})
}
}
func TestShellSplitterInvalid(t *testing.T) {
var tests = []struct {
data string
err string
}{
{
"foo'",
"single-quoted string not terminated",
},
{
`foo"`,
"double-quoted string not terminated",
},
{
"foo 'bar",
"single-quoted string not terminated",
},
{
`foo "bar`,
"double-quoted string not terminated",
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
cmd, args, err := SplitShellArgs(test.data)
if err == nil {
t.Fatalf("expected error not found: %v", test.err)
}
if err.Error() != test.err {
t.Fatalf("expected error not found, want:\n %q\ngot:\n %q", test.err, err.Error())
}
if cmd != "" {
t.Fatalf("splitter returned cmd from invalid data: %v", cmd)
}
if len(args) > 0 {
t.Fatalf("splitter returned fields from invalid data: %v", args)
}
})
}
}

52
src/restic/backend/sftp/sshcmd_test.go
View File

@ -1,46 +1,52 @@
package sftp
import "testing"
import (
"reflect"
"testing"
)
var sshcmdTests = []struct {
cfg Config
s []string
cmd string
args []string
}{
{
Config{User: "user", Host: "host", Dir: "dir/subdir"},
Config{User: "user", Host: "host", Path: "dir/subdir"},
"ssh",
[]string{"host", "-l", "user", "-s", "sftp"},
},
{
Config{Host: "host", Dir: "dir/subdir"},
Config{Host: "host", Path: "dir/subdir"},
"ssh",
[]string{"host", "-s", "sftp"},
},
{
Config{Host: "host:10022", Dir: "/dir/subdir"},
Config{Host: "host:10022", Path: "/dir/subdir"},
"ssh",
[]string{"host", "-p", "10022", "-s", "sftp"},
},
{
Config{User: "user", Host: "host:10022", Dir: "/dir/subdir"},
Config{User: "user", Host: "host:10022", Path: "/dir/subdir"},
"ssh",
[]string{"host", "-p", "10022", "-l", "user", "-s", "sftp"},
},
}
func TestBuildSSHCommand(t *testing.T) {
for i, test := range sshcmdTests {
cmd := buildSSHCommand(test.cfg)
failed := false
if len(cmd) != len(test.s) {
failed = true
} else {
for l := range test.s {
if test.s[l] != cmd[l] {
failed = true
break
}
}
}
if failed {
t.Errorf("test %d: wrong cmd, want:\n %v\ngot:\n %v",
i, test.s, cmd)
}
for _, test := range sshcmdTests {
t.Run("", func(t *testing.T) {
cmd, args, err := buildSSHCommand(test.cfg)
if err != nil {
t.Fatal(err)
}
if cmd != test.cmd {
t.Fatalf("cmd: want %v, got %v", test.cmd, cmd)
}
if !reflect.DeepEqual(test.args, args) {
t.Fatalf("wrong args, want:\n %v\ngot:\n %v", test.args, args)
}
})
}
}

45
src/restic/backend/test/tests.go
View File

@ -43,7 +43,7 @@ func open(t testing.TB) restic.Backend {
if !butInitialized {
be, err := CreateFn()
if err != nil {
t.Fatalf("Create returned unexpected error: %v", err)
t.Fatalf("Create returned unexpected error: %+v", err)
}
but = be
@ -54,7 +54,7 @@ func open(t testing.TB) restic.Backend {
var err error
but, err = OpenFn()
if err != nil {
t.Fatalf("Open returned unexpected error: %v", err)
t.Fatalf("Open returned unexpected error: %+v", err)
}
}
@ -68,7 +68,7 @@ func close(t testing.TB) {
err := but.Close()
if err != nil {
t.Fatalf("Close returned unexpected error: %v", err)
t.Fatalf("Close returned unexpected error: %+v", err)
}
but = nil
@ -82,14 +82,14 @@ func TestCreate(t testing.TB) {
be, err := CreateFn()
if err != nil {
t.Fatalf("Create returned error: %v", err)
t.Fatalf("Create returned error: %+v", err)
}
butInitialized = true
err = be.Close()
if err != nil {
t.Fatalf("Close returned error: %v", err)
t.Fatalf("Close returned error: %+v", err)
}
}
@ -101,12 +101,12 @@ func TestOpen(t testing.TB) {
be, err := OpenFn()
if err != nil {
t.Fatalf("Open returned error: %v", err)
t.Fatalf("Open returned error: %+v", err)
}
err = be.Close()
if err != nil {
t.Fatalf("Close returned error: %v", err)
t.Fatalf("Close returned error: %+v", err)
}
}
@ -132,7 +132,7 @@ func TestCreateWithConfig(t testing.TB) {
// remove config
err = b.Remove(restic.Handle{Type: restic.ConfigFile, Name: ""})
if err != nil {
t.Fatalf("unexpected error removing config: %v", err)
t.Fatalf("unexpected error removing config: %+v", err)
}
}
@ -162,7 +162,7 @@ func TestConfig(t testing.TB) {
err = b.Save(restic.Handle{Type: restic.ConfigFile}, strings.NewReader(testString))
if err != nil {
t.Fatalf("Save() error: %v", err)
t.Fatalf("Save() error: %+v", err)
}
// try accessing the config with different names, should all return the
@ -171,7 +171,7 @@ func TestConfig(t testing.TB) {
h := restic.Handle{Type: restic.ConfigFile, Name: name}
buf, err := backend.LoadAll(b, h)
if err != nil {
t.Fatalf("unable to read config with name %q: %v", name, err)
t.Fatalf("unable to read config with name %q: %+v", name, err)
}
if string(buf) != testString {
@ -203,7 +203,7 @@ func TestLoad(t testing.TB) {
handle := restic.Handle{Type: restic.DataFile, Name: id.String()}
err = b.Save(handle, bytes.NewReader(data))
if err != nil {
t.Fatalf("Save() error: %v", err)
t.Fatalf("Save() error: %+v", err)
}
rd, err := b.Load(handle, 100, -1)
@ -238,13 +238,13 @@ func TestLoad(t testing.TB) {
rd, err := b.Load(handle, getlen, int64(o))
if err != nil {
t.Errorf("Load(%d, %d) returned unexpected error: %v", l, o, err)
t.Errorf("Load(%d, %d) returned unexpected error: %+v", l, o, err)
continue
}
buf, err := ioutil.ReadAll(rd)
if err != nil {
t.Errorf("Load(%d, %d) ReadAll() returned unexpected error: %v", l, o, err)
t.Errorf("Load(%d, %d) ReadAll() returned unexpected error: %+v", l, o, err)
rd.Close()
continue
}
@ -269,7 +269,7 @@ func TestLoad(t testing.TB) {
err = rd.Close()
if err != nil {
t.Errorf("Load(%d, %d) rd.Close() returned unexpected error: %v", l, o, err)
t.Errorf("Load(%d, %d) rd.Close() returned unexpected error: %+v", l, o, err)
continue
}
}
@ -325,7 +325,7 @@ func TestSave(t testing.TB) {
err = b.Remove(h)
if err != nil {
t.Fatalf("error removing item: %v", err)
t.Fatalf("error removing item: %+v", err)
}
}
@ -366,7 +366,7 @@ func TestSave(t testing.TB) {
err = b.Remove(h)
if err != nil {
t.Fatalf("error removing item: %v", err)
t.Fatalf("error removing item: %+v", err)
}
}
@ -391,13 +391,13 @@ func TestSaveFilenames(t testing.TB) {
h := restic.Handle{Name: test.name, Type: restic.DataFile}
err := b.Save(h, strings.NewReader(test.data))
if err != nil {
t.Errorf("test %d failed: Save() returned %v", i, err)
t.Errorf("test %d failed: Save() returned %+v", i, err)
continue
}
buf, err := backend.LoadAll(b, h)
if err != nil {
t.Errorf("test %d failed: Load() returned %v", i, err)
t.Errorf("test %d failed: Load() returned %+v", i, err)
continue
}
@ -407,7 +407,7 @@ func TestSaveFilenames(t testing.TB) {
err = b.Remove(h)
if err != nil {
t.Errorf("test %d failed: Remove() returned %v", i, err)
t.Errorf("test %d failed: Remove() returned %+v", i, err)
continue
}
}
@ -511,7 +511,7 @@ func TestBackend(t testing.TB) {
// test that the blob is gone
ok, err := b.Test(h)
test.OK(t, err)
test.Assert(t, ok == false, "removed blob still present")
test.Assert(t, !ok, "removed blob still present")
// create blob
err = b.Save(h, strings.NewReader(ts.data))
@ -553,6 +553,7 @@ func TestBackend(t testing.TB) {
found, err := b.Test(h)
test.OK(t, err)
test.Assert(t, found, fmt.Sprintf("id %q not found", id))
test.OK(t, b.Remove(h))
@ -576,7 +577,7 @@ func TestDelete(t testing.TB) {
err := be.Delete()
if err != nil {
t.Fatalf("error deleting backend: %v", err)
t.Fatalf("error deleting backend: %+v", err)
}
}
@ -594,6 +595,6 @@ func TestCleanup(t testing.TB) {
err := CleanupFn()
if err != nil {
t.Fatalf("Cleanup returned error: %v", err)
t.Fatalf("Cleanup returned error: %+v", err)
}
}

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6
src/restic/backend/utils_test.go
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@ -49,8 +49,7 @@ func TestLoadSmallBuffer(t *testing.T) {
err := b.Save(restic.Handle{Name: id.String(), Type: restic.DataFile}, bytes.NewReader(data))
OK(t, err)
buf := make([]byte, len(data)-23)
buf, err = backend.LoadAll(b, restic.Handle{Type: restic.DataFile, Name: id.String()})
buf, err := backend.LoadAll(b, restic.Handle{Type: restic.DataFile, Name: id.String()})
OK(t, err)
if len(buf) != len(data) {
@ -75,8 +74,7 @@ func TestLoadLargeBuffer(t *testing.T) {
err := b.Save(restic.Handle{Name: id.String(), Type: restic.DataFile}, bytes.NewReader(data))
OK(t, err)
buf := make([]byte, len(data)+100)
buf, err = backend.LoadAll(b, restic.Handle{Type: restic.DataFile, Name: id.String()})
buf, err := backend.LoadAll(b, restic.Handle{Type: restic.DataFile, Name: id.String()})
OK(t, err)
if len(buf) != len(data) {

80
src/restic/options/options.go
View File

@ -3,6 +3,7 @@ package options
import (
"reflect"
"restic/errors"
"sort"
"strconv"
"strings"
"time"
@ -11,6 +12,85 @@ import (
// Options holds options in the form key=value.
type Options map[string]string
var opts []Help
// Register allows registering options so that they can be listed with List.
func Register(ns string, cfg interface{}) {
opts = appendAllOptions(opts, ns, cfg)
}
// List returns a list of all registered options (using Register()).
func List() (list []Help) {
list = make([]Help, 0, len(opts))
for _, opt := range opts {
list = append(list, opt)
}
return list
}
// appendAllOptions appends all options in cfg to opts, sorted by namespace.
func appendAllOptions(opts []Help, ns string, cfg interface{}) []Help {
for _, opt := range listOptions(cfg) {
opt.Namespace = ns
opts = append(opts, opt)
}
sort.Sort(helpList(opts))
return opts
}
// listOptions returns a list of options of cfg.
func listOptions(cfg interface{}) (opts []Help) {
// resolve indirection if cfg is a pointer
v := reflect.Indirect(reflect.ValueOf(cfg))
for i := 0; i < v.NumField(); i++ {
f := v.Type().Field(i)
h := Help{
Name: f.Tag.Get("option"),
Text: f.Tag.Get("help"),
}
if h.Name == "" {
continue
}
opts = append(opts, h)
}
return opts
}
// Help contains information about an option.
type Help struct {
Namespace string
Name string
Text string
}
type helpList []Help
// Len is the number of elements in the collection.
func (h helpList) Len() int {
return len(h)
}
// Less reports whether the element with
// index i should sort before the element with index j.
func (h helpList) Less(i, j int) bool {
if h[i].Namespace == h[j].Namespace {
return h[i].Name < h[j].Name
}
return h[i].Namespace < h[j].Namespace
}
// Swap swaps the elements with indexes i and j.
func (h helpList) Swap(i, j int) {
h[i], h[j] = h[j], h[i]
}
// splitKeyValue splits at the first equals (=) sign.
func splitKeyValue(s string) (key string, value string) {
data := strings.SplitN(s, "=", 2)

92
src/restic/options/options_test.go
View File

@ -218,3 +218,95 @@ func TestOptionsApplyInvalid(t *testing.T) {
})
}
}
func TestListOptions(t *testing.T) {
var teststruct = struct {
Foo string `option:"foo" help:"bar text help"`
}{}
var tests = []struct {
cfg interface{}
opts []Help
}{
{
struct {
Foo string `option:"foo" help:"bar text help"`
}{},
[]Help{
Help{Name: "foo", Text: "bar text help"},
},
},
{
struct {
Foo string `option:"foo" help:"bar text help"`
Bar string `option:"bar" help:"bar text help"`
}{},
[]Help{
Help{Name: "foo", Text: "bar text help"},
Help{Name: "bar", Text: "bar text help"},
},
},
{
struct {
Bar string `option:"bar" help:"bar text help"`
Foo string `option:"foo" help:"bar text help"`
}{},
[]Help{
Help{Name: "bar", Text: "bar text help"},
Help{Name: "foo", Text: "bar text help"},
},
},
{
&teststruct,
[]Help{
Help{Name: "foo", Text: "bar text help"},
},
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
opts := listOptions(test.cfg)
if !reflect.DeepEqual(opts, test.opts) {
t.Fatalf("wrong opts, want:\n %v\ngot:\n %v", test.opts, opts)
}
})
}
}
func TestAppendAllOptions(t *testing.T) {
var tests = []struct {
cfgs map[string]interface{}
opts []Help
}{
{
map[string]interface{}{
"local": struct {
Foo string `option:"foo" help:"bar text help"`
}{},
"sftp": struct {
Foo string `option:"foo" help:"bar text help2"`
Bar string `option:"bar" help:"bar text help"`
}{},
},
[]Help{
Help{Namespace: "local", Name: "foo", Text: "bar text help"},
Help{Namespace: "sftp", Name: "bar", Text: "bar text help"},
Help{Namespace: "sftp", Name: "foo", Text: "bar text help2"},
},
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
var opts []Help
for ns, cfg := range test.cfgs {
opts = appendAllOptions(opts, ns, cfg)
}
if !reflect.DeepEqual(opts, test.opts) {
t.Fatalf("wrong list, want:\n %v\ngot:\n %v", test.opts, opts)
}
})
}
}

6
src/restic/repository/testing.go
View File

@ -19,8 +19,12 @@ var testKDFParams = crypto.KDFParams{
P: 1,
}
type logger interface {
Logf(format string, args ...interface{})
}
// TestUseLowSecurityKDFParameters configures low-security KDF parameters for testing.
func TestUseLowSecurityKDFParameters(t testing.TB) {
func TestUseLowSecurityKDFParameters(t logger) {
t.Logf("using low-security KDF parameters for test")
KDFParams = &testKDFParams
}

18
src/restic/test/helpers.go
View File

@ -170,3 +170,21 @@ func RemoveAll(t testing.TB, path string) {
ResetReadOnly(t, path)
OK(t, os.RemoveAll(path))
}
// TempDir returns a temporary directory that is removed when cleanup is
// called, except if TestCleanupTempDirs is set to false.
func TempDir(t testing.TB) (path string, cleanup func()) {
tempdir, err := ioutil.TempDir(TestTempDir, "restic-test-")
if err != nil {
t.Fatal(err)
}
return tempdir, func() {
if !TestCleanupTempDirs {
t.Logf("leaving temporary directory %v used for test", tempdir)
return
}
RemoveAll(t, tempdir)
}
}

2
src/restic/test/vars.go
View File

@ -11,7 +11,7 @@ var (
TestTempDir = getStringVar("RESTIC_TEST_TMPDIR", "")
RunIntegrationTest = getBoolVar("RESTIC_TEST_INTEGRATION", true)
RunFuseTest = getBoolVar("RESTIC_TEST_FUSE", true)
TestSFTPPath = getStringVar("RESTIC_TEST_SFTPPATH", "/usr/lib/ssh:/usr/lib/openssh")
TestSFTPPath = getStringVar("RESTIC_TEST_SFTPPATH", "/usr/lib/ssh:/usr/lib/openssh:/usr/libexec")
TestWalkerPath = getStringVar("RESTIC_TEST_PATH", ".")
BenchArchiveDirectory = getStringVar("RESTIC_BENCH_DIR", ".")
TestS3Server = getStringVar("RESTIC_TEST_S3_SERVER", "")