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mirror of https://github.com/octoleo/restic.git synced 2024-11-26 14:56:29 +00:00

fuse: improve tests

This commit is contained in:
Alexander Neumann 2017-01-24 11:41:29 +01:00
parent 2de7e03698
commit 26da14f315
2 changed files with 83 additions and 122 deletions

View File

@ -4,8 +4,6 @@
package fuse
import (
"sync"
"restic/errors"
"restic"
@ -35,29 +33,23 @@ type file struct {
node *restic.Node
ownerIsRoot bool
sizes []uint
sizes []int
blobs [][]byte
}
const defaultBlobSize = 128 * 1024
var blobPool = sync.Pool{
New: func() interface{} {
return make([]byte, defaultBlobSize)
},
}
func newFile(repo BlobLoader, node *restic.Node, ownerIsRoot bool) (*file, error) {
debug.Log("create new file for %v with %d blobs", node.Name, len(node.Content))
var bytes uint64
sizes := make([]uint, len(node.Content))
sizes := make([]int, len(node.Content))
for i, id := range node.Content {
size, err := repo.LookupBlobSize(id, restic.DataBlob)
if err != nil {
return nil, err
}
sizes[i] = size
sizes[i] = int(size)
bytes += uint64(size)
}
@ -99,16 +91,7 @@ func (f *file) getBlobAt(i int) (blob []byte, err error) {
return f.blobs[i], nil
}
buf := blobPool.Get().([]byte)
buf = buf[:cap(buf)]
if uint(len(buf)) < f.sizes[i] {
if len(buf) > defaultBlobSize {
blobPool.Put(buf)
}
buf = make([]byte, f.sizes[i])
}
buf := restic.NewBlobBuffer(f.sizes[i])
n, err := f.repo.LoadBlob(restic.DataBlob, f.node.Content[i], buf)
if err != nil {
debug.Log("LoadBlob(%v, %v) failed: %v", f.node.Name, f.node.Content[i], err)
@ -169,10 +152,7 @@ func (f *file) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadR
func (f *file) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
for i := range f.blobs {
if f.blobs[i] != nil {
blobPool.Put(f.blobs[i])
f.blobs[i] = nil
}
f.blobs[i] = nil
}
return nil
}

View File

@ -9,7 +9,9 @@ import (
"testing"
"time"
"restic/errors"
"golang.org/x/net/context"
"restic/repository"
"bazil.org/fuse"
@ -17,108 +19,96 @@ import (
. "restic/test"
)
type MockRepo struct {
blobs map[restic.ID][]byte
}
func NewMockRepo(content map[restic.ID][]byte) *MockRepo {
return &MockRepo{blobs: content}
}
func (m *MockRepo) LookupBlobSize(id restic.ID, t restic.BlobType) (uint, error) {
buf, ok := m.blobs[id]
if !ok {
return 0, errors.New("blob not found")
}
return uint(len(buf)), nil
}
func (m *MockRepo) LoadBlob(t restic.BlobType, id restic.ID, buf []byte) (int, error) {
size, err := m.LookupBlobSize(id, t)
if err != nil {
return 0, err
}
if uint(len(buf)) < size {
return 0, errors.New("buffer too small")
}
buf = buf[:size]
copy(buf, m.blobs[id])
return int(size), nil
}
type MockContext struct{}
func (m MockContext) Deadline() (time.Time, bool) { return time.Now(), false }
func (m MockContext) Done() <-chan struct{} { return nil }
func (m MockContext) Err() error { return nil }
func (m MockContext) Value(key interface{}) interface{} { return nil }
var testContent = genTestContent()
var testContentLengths = []uint{
4646 * 1024,
655 * 1024,
378 * 1024,
8108 * 1024,
558 * 1024,
}
var testMaxFileSize uint
func genTestContent() map[restic.ID][]byte {
m := make(map[restic.ID][]byte)
for _, length := range testContentLengths {
buf := Random(int(length), int(length))
id := restic.Hash(buf)
m[id] = buf
testMaxFileSize += length
}
return m
}
const maxBufSize = 20 * 1024 * 1024
func testRead(t *testing.T, f *file, offset, length int, data []byte) {
ctx := MockContext{}
func testRead(t testing.TB, f *file, offset, length int, data []byte) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
req := &fuse.ReadRequest{
Offset: int64(offset),
Size: length,
}
resp := &fuse.ReadResponse{
Data: make([]byte, length),
Data: data,
}
OK(t, f.Read(ctx, req, resp))
}
var offsetReadsTests = []struct {
offset, length int
}{
{0, 5 * 1024 * 1024},
{4000 * 1024, 1000 * 1024},
func firstSnapshotID(t testing.TB, repo restic.Repository) (first restic.ID) {
done := make(chan struct{})
defer close(done)
for id := range repo.List(restic.SnapshotFile, done) {
if first.IsNull() {
first = id
}
}
return first
}
func loadFirstSnapshot(t testing.TB, repo restic.Repository) *restic.Snapshot {
id := firstSnapshotID(t, repo)
sn, err := restic.LoadSnapshot(repo, id)
OK(t, err)
return sn
}
func loadTree(t testing.TB, repo restic.Repository, id restic.ID) *restic.Tree {
tree, err := repo.LoadTree(id)
OK(t, err)
return tree
}
func TestFuseFile(t *testing.T) {
repo := NewMockRepo(testContent)
ctx := MockContext{}
repo, cleanup := repository.TestRepository(t)
defer cleanup()
memfile := make([]byte, 0, maxBufSize)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
timestamp, err := time.Parse(time.RFC3339, "2017-01-24T10:42:56+01:00")
OK(t, err)
restic.TestCreateSnapshot(t, repo, timestamp, 2, 0.1)
sn := loadFirstSnapshot(t, repo)
tree := loadTree(t, repo, *sn.Tree)
var content restic.IDs
for _, node := range tree.Nodes {
content = append(content, node.Content...)
}
t.Logf("tree loaded, content: %v", content)
var (
filesize uint64
memfile []byte
)
for _, id := range content {
size, err := repo.LookupBlobSize(id, restic.DataBlob)
OK(t, err)
filesize += uint64(size)
buf := restic.NewBlobBuffer(int(size))
n, err := repo.LoadBlob(restic.DataBlob, id, buf)
OK(t, err)
if uint(n) != size {
t.Fatalf("not enough bytes read for id %v: want %v, got %v", id.Str(), size, n)
}
if uint(len(buf)) != size {
t.Fatalf("buffer has wrong length for id %v: want %v, got %v", id.Str(), size, len(buf))
}
var ids restic.IDs
for id, buf := range repo.blobs {
ids = append(ids, id)
memfile = append(memfile, buf...)
}
t.Logf("filesize is %v, memfile has size %v", filesize, len(memfile))
node := &restic.Node{
Name: "foo",
Inode: 23,
Mode: 0742,
Size: 42,
Content: ids,
Size: filesize,
Content: content,
}
f, err := newFile(repo, node, false)
OK(t, err)
@ -131,28 +121,19 @@ func TestFuseFile(t *testing.T) {
Equals(t, node.Size, attr.Size)
Equals(t, (node.Size/uint64(attr.BlockSize))+1, attr.Blocks)
for i, test := range offsetReadsTests {
b := memfile[test.offset : test.offset+test.length]
buf := make([]byte, test.length)
testRead(t, f, test.offset, test.length, buf)
if !bytes.Equal(b, buf) {
t.Errorf("test %d failed, wrong data returned", i)
}
}
for i := 0; i < 200; i++ {
length := rand.Intn(int(testMaxFileSize) / 2)
offset := rand.Intn(int(testMaxFileSize))
if length+offset > int(testMaxFileSize) {
diff := length + offset - int(testMaxFileSize)
length -= diff
}
offset := rand.Intn(int(filesize))
length := rand.Intn(int(filesize)-offset) + 100
b := memfile[offset : offset+length]
buf := make([]byte, length)
testRead(t, f, offset, length, buf)
if !bytes.Equal(b, buf) {
t.Errorf("test %d failed (offset %d, length %d), wrong data returned", i, offset, length)
t.Errorf("test %d failed, wrong data returned (offset %v, length %v)", i, offset, length)
}
}
OK(t, f.Release(ctx, nil))
}