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Commit f4cec619 authored by Han-Wen Nienhuys's avatar Han-Wen Nienhuys
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unionfs: remove library 

This library was created as a mechanism to overlay a writable checkout
for Git on top of Google's readonly SrcFS filesystem. This use case
has long disappeared, and the unionfs library appears unused
otherwise. Due to its reliance on timestamps and delays, it is very
susceptible to flakiness in tests.

Fixing this seems hard or maybe even impossible, so just remove the
library.

Change-Id: I6c594a724a0579b5c4c3aada76cd7013195fda94
parent d8187fce
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unionfs/autounion.go deleted 100644 → 0
View file @ d8187fce
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unionfs/autounion_test.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"io/ioutil"
"os"
"testing"
"time"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/hanwen/go-fuse/v2/fuse/nodefs"
"github.com/hanwen/go-fuse/v2/fuse/pathfs"
"github.com/hanwen/go-fuse/v2/internal/testutil"
)
const entryTTL = 100 * time.Millisecond
var testAOpts = AutoUnionFsOptions{
UnionFsOptions: testOpts,
Options: nodefs.Options{
EntryTimeout: entryTTL,
AttrTimeout: entryTTL,
NegativeTimeout: 0,
Debug: testutil.VerboseTest(),
LookupKnownChildren: true,
},
HideReadonly: true,
Version: "version",
}
func init() {
testAOpts.Options.Debug = testutil.VerboseTest()
}
func WriteFile(t *testing.T, name string, contents string) {
err := ioutil.WriteFile(name, []byte(contents), 0644)
if err != nil {
t.Fatalf("WriteFile failed: %v", err)
}
}
func setup(t *testing.T) (workdir string, server *fuse.Server, cleanup func()) {
wd := testutil.TempDir()
err := os.Mkdir(wd+"/mnt", 0700)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
err = os.Mkdir(wd+"/store", 0700)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
os.Mkdir(wd+"/ro", 0700)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
WriteFile(t, wd+"/ro/file1", "file1")
WriteFile(t, wd+"/ro/file2", "file2")
fs := NewAutoUnionFs(wd+"/store", testAOpts)
nfs := pathfs.NewPathNodeFs(fs, nil)
state, _, err := nodefs.MountRoot(wd+"/mnt", nfs.Root(), &testAOpts.Options)
if err != nil {
t.Fatalf("MountNodeFileSystem failed: %v", err)
}
go state.Serve()
state.WaitMount()
return wd, state, func() {
state.Unmount()
os.RemoveAll(wd)
}
}
func TestDebug(t *testing.T) {
wd, _, clean := setup(t)
defer clean()
c, err := ioutil.ReadFile(wd + "/mnt/status/debug")
if err != nil {
t.Fatalf("ReadFile failed: %v", err)
}
if len(c) == 0 {
t.Fatal("No debug found.")
}
}
func TestVersion(t *testing.T) {
wd, _, clean := setup(t)
defer clean()
c, err := ioutil.ReadFile(wd + "/mnt/status/gounionfs_version")
if err != nil {
t.Fatalf("ReadFile failed: %v", err)
}
if len(c) == 0 {
t.Fatal("No version found.")
}
}
func TestAutoFsSymlink(t *testing.T) {
wd, server, clean := setup(t)
defer clean()
err := os.Mkdir(wd+"/store/backing1", 0755)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
err = os.Symlink(wd+"/ro", wd+"/store/backing1/READONLY")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
err = os.Symlink(wd+"/store/backing1", wd+"/mnt/config/manual1")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
fi, err := os.Lstat(wd + "/mnt/manual1/file1")
if err != nil {
t.Fatalf("Lstat failed: %v", err)
}
entries, err := ioutil.ReadDir(wd + "/mnt")
if err != nil {
t.Fatalf("ReadDir failed: %v", err)
}
if len(entries) != 3 {
t.Error("readdir mismatch", entries)
}
err = os.Remove(wd + "/mnt/config/manual1")
if err != nil {
t.Fatalf("Remove failed: %v", err)
}
scan := wd + "/mnt/config/" + _SCAN_CONFIG
err = ioutil.WriteFile(scan, []byte("something"), 0644)
if err != nil {
t.Error("error writing:", err)
}
// If FUSE supports invalid inode notifications we expect this node to be gone. Otherwise we'll just make sure that it's not reachable.
if server.KernelSettings().SupportsNotify(fuse.NOTIFY_INVAL_INODE) {
fi, _ = os.Lstat(wd + "/mnt/manual1")
if fi != nil {
t.Error("Should not have file:", fi)
}
} else {
entries, err = ioutil.ReadDir(wd + "/mnt")
if err != nil {
t.Fatalf("ReadDir failed: %v", err)
}
for _, e := range entries {
if e.Name() == "manual1" {
t.Error("Should not have entry: ", e)
}
}
}
_, err = os.Lstat(wd + "/mnt/backing1/file1")
if err != nil {
t.Fatalf("Lstat failed: %v", err)
}
}
func TestDetectSymlinkedDirectories(t *testing.T) {
wd, _, clean := setup(t)
defer clean()
err := os.Mkdir(wd+"/backing1", 0755)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
err = os.Symlink(wd+"/ro", wd+"/backing1/READONLY")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
err = os.Symlink(wd+"/backing1", wd+"/store/backing1")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
scan := wd + "/mnt/config/" + _SCAN_CONFIG
err = ioutil.WriteFile(scan, []byte("something"), 0644)
if err != nil {
t.Error("error writing:", err)
}
_, err = os.Lstat(wd + "/mnt/backing1")
if err != nil {
t.Fatalf("Lstat failed: %v", err)
}
}
func TestExplicitScan(t *testing.T) {
wd, _, clean := setup(t)
defer clean()
err := os.Mkdir(wd+"/store/backing1", 0755)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
os.Symlink(wd+"/ro", wd+"/store/backing1/READONLY")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
fi, _ := os.Lstat(wd + "/mnt/backing1")
if fi != nil {
t.Error("Should not have file:", fi)
}
scan := wd + "/mnt/config/" + _SCAN_CONFIG
_, err = os.Lstat(scan)
if err != nil {
t.Error(".scan_config missing:", err)
}
err = ioutil.WriteFile(scan, []byte("something"), 0644)
if err != nil {
t.Error("error writing:", err)
}
_, err = os.Lstat(wd + "/mnt/backing1")
if err != nil {
t.Error("Should have workspace backing1:", err)
}
}
func TestCreationChecks(t *testing.T) {
wd, _, clean := setup(t)
defer clean()
err := os.Mkdir(wd+"/store/foo", 0755)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
os.Symlink(wd+"/ro", wd+"/store/foo/READONLY")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
err = os.Mkdir(wd+"/store/ws2", 0755)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
os.Symlink(wd+"/ro", wd+"/store/ws2/READONLY")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
err = os.Symlink(wd+"/store/foo", wd+"/mnt/config/bar")
if err != nil {
t.Fatalf("Symlink failed: %v", err)
}
err = os.Symlink(wd+"/store/foo", wd+"/mnt/config/foo")
code := fuse.ToStatus(err)
if code != fuse.EBUSY {
t.Error("Should return EBUSY", err)
}
err = os.Symlink(wd+"/store/ws2", wd+"/mnt/config/config")
code = fuse.ToStatus(err)
if code != fuse.EINVAL {
t.Error("Should return EINVAL", err)
}
}
unionfs/cachingfs.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"fmt"
"log"
"strings"
"time"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/hanwen/go-fuse/v2/fuse/nodefs"
"github.com/hanwen/go-fuse/v2/fuse/pathfs"
)
const _XATTRSEP = "@XATTR@"
type attrResponse struct {
*fuse.Attr
fuse.Status
}
type xattrResponse struct {
data []byte
fuse.Status
}
type dirResponse struct {
entries []fuse.DirEntry
fuse.Status
}
type linkResponse struct {
linkContent string
fuse.Status
}
// Caches filesystem metadata.
type cachingFileSystem struct {
pathfs.FileSystem
attributes *TimedCache
dirs *TimedCache
links *TimedCache
xattr *TimedCache
}
func readDir(fs pathfs.FileSystem, name string) *dirResponse {
origStream, code := fs.OpenDir(name, nil)
r := &dirResponse{nil, code}
if !code.Ok() {
return r
}
r.entries = origStream
return r
}
func getAttr(fs pathfs.FileSystem, name string) *attrResponse {
a, code := fs.GetAttr(name, nil)
return &attrResponse{
Attr: a,
Status: code,
}
}
func getXAttr(fs pathfs.FileSystem, nameAttr string) *xattrResponse {
ns := strings.SplitN(nameAttr, _XATTRSEP, 2)
a, code := fs.GetXAttr(ns[0], ns[1], nil)
return &xattrResponse{
data: a,
Status: code,
}
}
func readLink(fs pathfs.FileSystem, name string) *linkResponse {
a, code := fs.Readlink(name, nil)
return &linkResponse{
linkContent: a,
Status: code,
}
}
func NewCachingFileSystem(fs pathfs.FileSystem, ttl time.Duration) pathfs.FileSystem {
c := new(cachingFileSystem)
c.FileSystem = fs
c.attributes = NewTimedCache(func(n string) (interface{}, bool) {
a := getAttr(fs, n)
return a, a.Ok()
}, ttl)
c.dirs = NewTimedCache(func(n string) (interface{}, bool) {
d := readDir(fs, n)
return d, d.Ok()
}, ttl)
c.links = NewTimedCache(func(n string) (interface{}, bool) {
l := readLink(fs, n)
return l, l.Ok()
}, ttl)
c.xattr = NewTimedCache(func(n string) (interface{}, bool) {
l := getXAttr(fs, n)
return l, l.Ok()
}, ttl)
return c
}
func (fs *cachingFileSystem) DropCache() {
for _, c := range []*TimedCache{fs.attributes, fs.dirs, fs.links, fs.xattr} {
c.DropAll(nil)
}
}
func (fs *cachingFileSystem) GetAttr(name string, context *fuse.Context) (*fuse.Attr, fuse.Status) {
if name == _DROP_CACHE {
return &fuse.Attr{
Mode: fuse.S_IFREG | 0777,
}, fuse.OK
}
r := fs.attributes.Get(name).(*attrResponse)
return r.Attr, r.Status
}
func (fs *cachingFileSystem) GetXAttr(name string, attr string, context *fuse.Context) ([]byte, fuse.Status) {
key := name + _XATTRSEP + attr
r := fs.xattr.Get(key).(*xattrResponse)
return r.data, r.Status
}
func (fs *cachingFileSystem) Readlink(name string, context *fuse.Context) (string, fuse.Status) {
r := fs.links.Get(name).(*linkResponse)
return r.linkContent, r.Status
}
func (fs *cachingFileSystem) OpenDir(name string, context *fuse.Context) (stream []fuse.DirEntry, status fuse.Status) {
r := fs.dirs.Get(name).(*dirResponse)
return r.entries, r.Status
}
func (fs *cachingFileSystem) String() string {
return fmt.Sprintf("cachingFileSystem(%v)", fs.FileSystem)
}
func (fs *cachingFileSystem) Open(name string, flags uint32, context *fuse.Context) (f nodefs.File, status fuse.Status) {
if flags&fuse.O_ANYWRITE != 0 && name == _DROP_CACHE {
log.Println("Dropping cache for", fs)
fs.DropCache()
}
return fs.FileSystem.Open(name, flags, context)
}
unionfs/cachingfs_test.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"os"
"syscall"
"testing"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/hanwen/go-fuse/v2/fuse/pathfs"
"github.com/hanwen/go-fuse/v2/internal/testutil"
)
func modeMapEq(m1, m2 map[string]uint32) bool {
if len(m1) != len(m2) {
return false
}
for k, v := range m1 {
val, ok := m2[k]
if !ok || val != v {
return false
}
}
return true
}
func TestCachingFs(t *testing.T) {
wd := testutil.TempDir()
defer os.RemoveAll(wd)
fs := pathfs.NewLoopbackFileSystem(wd)
cfs := NewCachingFileSystem(fs, 0)
os.Mkdir(wd+"/orig", 0755)
fi, code := cfs.GetAttr("orig", nil)
if !code.Ok() {
t.Fatal("GetAttr failure", code)
}
if !fi.IsDir() {
t.Error("unexpected attr", fi)
}
os.Symlink("orig", wd+"/symlink")
val, code := cfs.Readlink("symlink", nil)
if val != "orig" {
t.Error("unexpected readlink", val)
}
if !code.Ok() {
t.Error("code !ok ", code)
}
stream, code := cfs.OpenDir("", nil)
if !code.Ok() {
t.Fatal("Readdir fail", code)
}
results := make(map[string]uint32)
for _, v := range stream {
results[v.Name] = v.Mode &^ 07777
}
expected := map[string]uint32{
"symlink": syscall.S_IFLNK,
"orig": fuse.S_IFDIR,
}
if !modeMapEq(results, expected) {
t.Error("Unexpected readdir result", results, expected)
}
}
unionfs/create.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"os"
"github.com/hanwen/go-fuse/v2/fuse/pathfs"
)
func NewUnionFsFromRoots(roots []string, opts *UnionFsOptions, roCaching bool) (pathfs.FileSystem, error) {
fses := make([]pathfs.FileSystem, 0)
for i, r := range roots {
var fs pathfs.FileSystem
fi, err := os.Stat(r)
if err != nil {
return nil, err
}
if fi.IsDir() {
fs = pathfs.NewLoopbackFileSystem(r)
}
if fs == nil {
return nil, err
}
if i > 0 && roCaching {
fs = NewCachingFileSystem(fs, 0)
}
fses = append(fses, fs)
}
return NewUnionFs(fses, *opts)
}
unionfs/dircache.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"sync"
"time"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/hanwen/go-fuse/v2/fuse/pathfs"
)
// newDirnameMap reads the contents of the given directory. On error,
// returns a nil map. This forces reloads in the dirCache until we
// succeed.
func newDirnameMap(fs pathfs.FileSystem, dir string) map[string]struct{} {
stream, code := fs.OpenDir(dir, nil)
if code == fuse.ENOENT {
// The directory not existing is not an error.
return map[string]struct{}{}
}
if !code.Ok() {
return nil
}
result := make(map[string]struct{})
for _, e := range stream {
if e.Mode&fuse.S_IFREG != 0 {
result[e.Name] = struct{}{}
}
}
return result
}
// dirCache caches names in a directory for some time.
//
// If called when the cache is expired, the filenames are read afresh in
// the background.
type dirCache struct {
dir string
ttl time.Duration
fs pathfs.FileSystem
// Protects data below.
lock sync.RWMutex
// If nil, you may call refresh() to schedule a new one.
names map[string]struct{}
updateRunning bool
}
func (c *dirCache) setMap(newMap map[string]struct{}) {
c.lock.Lock()
defer c.lock.Unlock()
c.names = newMap
c.updateRunning = false
_ = time.AfterFunc(c.ttl,
func() { c.DropCache() })
}
func (c *dirCache) DropCache() {
c.lock.Lock()
defer c.lock.Unlock()
c.names = nil
}
// Try to refresh: if another update is already running, do nothing,
// otherwise, read the directory and set it.
func (c *dirCache) maybeRefresh() {
c.lock.Lock()
defer c.lock.Unlock()
if c.updateRunning {
return
}
c.updateRunning = true
go func() {
newmap := newDirnameMap(c.fs, c.dir)
c.setMap(newmap)
}()
}
func (c *dirCache) RemoveEntry(name string) {
c.lock.Lock()
defer c.lock.Unlock()
if c.names == nil {
go c.maybeRefresh()
return
}
delete(c.names, name)
}
func (c *dirCache) AddEntry(name string) {
c.lock.Lock()
defer c.lock.Unlock()
if c.names == nil {
go c.maybeRefresh()
return
}
c.names[name] = struct{}{}
}
func newDirCache(fs pathfs.FileSystem, dir string, ttl time.Duration) *dirCache {
dc := new(dirCache)
dc.dir = dir
dc.fs = fs
dc.ttl = ttl
return dc
}
func (c *dirCache) HasEntry(name string) (mapPresent bool, found bool) {
c.lock.RLock()
defer c.lock.RUnlock()
if c.names == nil {
go c.maybeRefresh()
return false, false
}
_, ok := c.names[name]
return true, ok
}
unionfs/timedcache.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"sync"
"time"
)
type cacheEntry struct {
data interface{}
// expiry is the absolute timestamp of the expiry.
expiry time.Time
}
// TimedCache caches the result of fetch() for some time. It is
// thread-safe. Calls of fetch() do no happen inside a critical
// section, so when multiple concurrent Get()s happen for the same
// key, multiple fetch() calls may be issued for the same key.
type TimedCacheFetcher func(name string) (value interface{}, cacheable bool)
type TimedCache struct {
fetch TimedCacheFetcher
// ttl is the duration of the cache.
ttl time.Duration
cacheMapMutex sync.RWMutex
cacheMap map[string]*cacheEntry
PurgeTimer *time.Timer
}
// Creates a new cache with the given TTL. If TTL <= 0, the caching is
// indefinite.
func NewTimedCache(fetcher TimedCacheFetcher, ttl time.Duration) *TimedCache {
l := new(TimedCache)
l.ttl = ttl
l.fetch = fetcher
l.cacheMap = make(map[string]*cacheEntry)
return l
}
func (c *TimedCache) Get(name string) interface{} {
c.cacheMapMutex.RLock()
info, ok := c.cacheMap[name]
c.cacheMapMutex.RUnlock()
valid := ok && (c.ttl <= 0 || info.expiry.After(time.Now()))
if valid {
return info.data
}
return c.GetFresh(name)
}
func (c *TimedCache) Set(name string, val interface{}) {
c.cacheMapMutex.Lock()
defer c.cacheMapMutex.Unlock()
c.cacheMap[name] = &cacheEntry{
data: val,
expiry: time.Now().Add(c.ttl),
}
}
func (c *TimedCache) DropEntry(name string) {
c.cacheMapMutex.Lock()
defer c.cacheMapMutex.Unlock()
delete(c.cacheMap, name)
}
func (c *TimedCache) GetFresh(name string) interface{} {
data, ok := c.fetch(name)
if ok {
c.Set(name, data)
}
return data
}
// Drop all expired entries.
func (c *TimedCache) Purge() {
keys := make([]string, 0, len(c.cacheMap))
now := time.Now()
c.cacheMapMutex.Lock()
defer c.cacheMapMutex.Unlock()
for k, v := range c.cacheMap {
if now.After(v.expiry) {
keys = append(keys, k)
}
}
for _, k := range keys {
delete(c.cacheMap, k)
}
}
func (c *TimedCache) DropAll(names []string) {
c.cacheMapMutex.Lock()
defer c.cacheMapMutex.Unlock()
if names == nil {
c.cacheMap = make(map[string]*cacheEntry, len(c.cacheMap))
} else {
for _, nm := range names {
delete(c.cacheMap, nm)
}
}
}
unionfs/timedcache_test.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"testing"
"time"
)
func TestTimedCacheUncacheable(t *testing.T) {
fetchCount := 0
fetch := func(n string) (interface{}, bool) {
fetchCount++
i := int(n[0])
return &i, false
}
cache := NewTimedCache(fetch, 0)
v := cache.Get("n").(*int)
w := cache.Get("n").(*int)
if *v != int('n') || *w != *v {
t.Errorf("value mismatch: got %d, %d want %d", *v, *w, int('n'))
}
if fetchCount != 2 {
t.Fatalf("Should have fetched twice: %d", fetchCount)
}
}
func TestTimedCache(t *testing.T) {
fetchCount := 0
fetch := func(n string) (interface{}, bool) {
fetchCount++
i := int(n[0])
return &i, true
}
// This fails with 1e6 on some Opteron CPUs.
ttl := 100 * time.Millisecond
cache := NewTimedCache(fetch, ttl)
v := cache.Get("n").(*int)
if *v != int('n') {
t.Errorf("value mismatch: got %d, want %d", *v, int('n'))
}
if fetchCount != 1 {
t.Errorf("fetch count mismatch: got %d want 1", fetchCount)
}
// The cache update is async.
time.Sleep(time.Duration(ttl / 10))
w := cache.Get("n")
if v != w {
t.Errorf("Huh, inconsistent: 1st = %v != 2nd = %v", v, w)
}
if fetchCount > 1 {
t.Errorf("fetch count fail: %d > 1", fetchCount)
}
time.Sleep(time.Duration(ttl * 2))
cache.Purge()
w = cache.Get("n")
if fetchCount == 1 {
t.Error("Did not fetch again. Purge unsuccessful?")
}
}
unionfs/unionfs.go deleted 100644 → 0
View file @ d8187fce
This diff is collapsed.
unionfs/unionfs_test.go deleted 100644 → 0
View file @ d8187fce
This diff is collapsed.
unionfs/unionfs_xattr_test.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"os"
"sync/atomic"
"testing"
"time"
"github.com/hanwen/go-fuse/v2/fuse"
"github.com/hanwen/go-fuse/v2/fuse/nodefs"
"github.com/hanwen/go-fuse/v2/fuse/pathfs"
"github.com/hanwen/go-fuse/v2/internal/testutil"
)
type TestFS struct {
pathfs.FileSystem
xattrRead int64
}
func (fs *TestFS) GetAttr(path string, context *fuse.Context) (*fuse.Attr, fuse.Status) {
switch path {
case "":
return &fuse.Attr{Mode: fuse.S_IFDIR | 0755}, fuse.OK
case "file":
return &fuse.Attr{Mode: fuse.S_IFREG | 0755}, fuse.OK
}
return nil, fuse.ENOENT
}
func (fs *TestFS) GetXAttr(path string, name string, context *fuse.Context) ([]byte, fuse.Status) {
if path == "file" && name == "user.attr" {
atomic.AddInt64(&fs.xattrRead, 1)
return []byte{42}, fuse.OK
}
return nil, fuse.ENOATTR
}
func TestXAttrCaching(t *testing.T) {
wd := testutil.TempDir()
defer os.RemoveAll(wd)
os.Mkdir(wd+"/mnt", 0700)
err := os.Mkdir(wd+"/rw", 0700)
if err != nil {
t.Fatalf("Mkdir failed: %v", err)
}
rwFS := pathfs.NewLoopbackFileSystem(wd + "/rw")
roFS := &TestFS{
FileSystem: pathfs.NewDefaultFileSystem(),
}
ufs, err := NewUnionFs([]pathfs.FileSystem{rwFS,
NewCachingFileSystem(roFS, entryTTL)}, testOpts)
if err != nil {
t.Fatalf("NewUnionFs: %v", err)
}
opts := &nodefs.Options{
EntryTimeout: entryTTL / 2,
AttrTimeout: entryTTL / 2,
NegativeTimeout: entryTTL / 2,
Debug: testutil.VerboseTest(),
LookupKnownChildren: true,
}
pathfs := pathfs.NewPathNodeFs(ufs,
&pathfs.PathNodeFsOptions{ClientInodes: true,
Debug: testutil.VerboseTest()})
server, _, err := nodefs.MountRoot(wd+"/mnt", pathfs.Root(), opts)
if err != nil {
t.Fatalf("MountNodeFileSystem failed: %v", err)
}
defer server.Unmount()
go server.Serve()
server.WaitMount()
start := time.Now()
if fi, err := os.Lstat(wd + "/mnt"); err != nil || !fi.IsDir() {
t.Fatalf("root not readable: %v, %v", err, fi)
}
buf := make([]byte, 1024)
n, err := Getxattr(wd+"/mnt/file", "user.attr", buf)
if err != nil {
t.Fatalf("Getxattr: %v", err)
}
want := "\x2a"
got := string(buf[:n])
if got != want {
t.Fatalf("Got %q want %q", got, err)
}
time.Sleep(entryTTL / 3)
n, err = Getxattr(wd+"/mnt/file", "user.attr", buf)
if err != nil {
t.Fatalf("Getxattr: %v", err)
}
got = string(buf[:n])
if got != want {
t.Fatalf("Got %q want %q", got, err)
}
time.Sleep(entryTTL / 3)
// Make sure that an interceding Getxattr() to a filesystem that doesn't implement GetXAttr() doesn't affect future calls.
Getxattr(wd, "whatever", buf)
n, err = Getxattr(wd+"/mnt/file", "user.attr", buf)
if err != nil {
t.Fatalf("Getxattr: %v", err)
}
got = string(buf[:n])
if got != want {
t.Fatalf("Got %q want %q", got, err)
}
if time.Now().Sub(start) >= entryTTL {
// If we run really slowly, this test will spuriously
// fail.
t.Skip("test took too long.")
}
actual := atomic.LoadInt64(&roFS.xattrRead)
if actual != 1 {
t.Errorf("got xattrRead=%d, want 1", actual)
}
}
unionfs/unionfs_xattr_test_darwin.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"syscall"
"unsafe"
)
// Darwin doesn't have support for syscall.Getxattr() so we pull it into its own file and implement it by hand on Darwin.
func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
var _p0 *byte
_p0, err = syscall.BytePtrFromString(path)
if err != nil {
return
}
var _p1 *byte
_p1, err = syscall.BytePtrFromString(attr)
if err != nil {
return
}
var _p2 unsafe.Pointer
if len(dest) > 0 {
_p2 = unsafe.Pointer(&dest[0])
} else {
var _zero uintptr
_p2 = unsafe.Pointer(&_zero)
}
r0, _, e1 := syscall.Syscall6(syscall.SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), 0, 0)
sz = int(r0)
if e1 != 0 {
err = e1
}
return
}
unionfs/unionfs_xattr_test_linux.go deleted 100644 → 0
View file @ d8187fce
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unionfs
import (
"syscall"
)
// Darwin doesn't have support for syscall.Getxattr() so we pull it into its own file and implement it by hand on Darwin.
func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
return syscall.Getxattr(path, attr, dest)
}
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