syncthing/lib/model/rwfolder_test.go

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// Copyright (C) 2014 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
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package model
import (
"context"
"crypto/rand"
"io"
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"os"
"path/filepath"
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"testing"
"time"
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"github.com/syncthing/syncthing/lib/db"
"github.com/syncthing/syncthing/lib/fs"
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"github.com/syncthing/syncthing/lib/protocol"
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"github.com/syncthing/syncthing/lib/scanner"
"github.com/syncthing/syncthing/lib/sync"
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)
func TestMain(m *testing.M) {
// We do this to make sure that the temp file required for the tests
// does not get removed during the tests. Also set the prefix so it's
// found correctly regardless of platform.
if fs.TempPrefix != fs.WindowsTempPrefix {
originalPrefix := fs.TempPrefix
fs.TempPrefix = fs.WindowsTempPrefix
defer func() {
fs.TempPrefix = originalPrefix
}()
}
future := time.Now().Add(time.Hour)
err := os.Chtimes(filepath.Join("testdata", fs.TempName("file")), future, future)
if err != nil {
panic(err)
}
os.Exit(m.Run())
}
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var blocks = []protocol.BlockInfo{
{Hash: []uint8{0xfa, 0x43, 0x23, 0x9b, 0xce, 0xe7, 0xb9, 0x7c, 0xa6, 0x2f, 0x0, 0x7c, 0xc6, 0x84, 0x87, 0x56, 0xa, 0x39, 0xe1, 0x9f, 0x74, 0xf3, 0xdd, 0xe7, 0x48, 0x6d, 0xb3, 0xf9, 0x8d, 0xf8, 0xe4, 0x71}}, // Zero'ed out block
{Offset: 0, Size: 0x20000, Hash: []uint8{0x7e, 0xad, 0xbc, 0x36, 0xae, 0xbb, 0xcf, 0x74, 0x43, 0xe2, 0x7a, 0x5a, 0x4b, 0xb8, 0x5b, 0xce, 0xe6, 0x9e, 0x1e, 0x10, 0xf9, 0x8a, 0xbc, 0x77, 0x95, 0x2, 0x29, 0x60, 0x9e, 0x96, 0xae, 0x6c}},
{Offset: 131072, Size: 0x20000, Hash: []uint8{0x3c, 0xc4, 0x20, 0xf4, 0xb, 0x2e, 0xcb, 0xb9, 0x5d, 0xce, 0x34, 0xa8, 0xc3, 0x92, 0xea, 0xf3, 0xda, 0x88, 0x33, 0xee, 0x7a, 0xb6, 0xe, 0xf1, 0x82, 0x5e, 0xb0, 0xa9, 0x26, 0xa9, 0xc0, 0xef}},
{Offset: 262144, Size: 0x20000, Hash: []uint8{0x76, 0xa8, 0xc, 0x69, 0xd7, 0x5c, 0x52, 0xfd, 0xdf, 0x55, 0xef, 0x44, 0xc1, 0xd6, 0x25, 0x48, 0x4d, 0x98, 0x48, 0x4d, 0xaa, 0x50, 0xf6, 0x6b, 0x32, 0x47, 0x55, 0x81, 0x6b, 0xed, 0xee, 0xfb}},
{Offset: 393216, Size: 0x20000, Hash: []uint8{0x44, 0x1e, 0xa4, 0xf2, 0x8d, 0x1f, 0xc3, 0x1b, 0x9d, 0xa5, 0x18, 0x5e, 0x59, 0x1b, 0xd8, 0x5c, 0xba, 0x7d, 0xb9, 0x8d, 0x70, 0x11, 0x5c, 0xea, 0xa1, 0x57, 0x4d, 0xcb, 0x3c, 0x5b, 0xf8, 0x6c}},
{Offset: 524288, Size: 0x20000, Hash: []uint8{0x8, 0x40, 0xd0, 0x5e, 0x80, 0x0, 0x0, 0x7c, 0x8b, 0xb3, 0x8b, 0xf7, 0x7b, 0x23, 0x26, 0x28, 0xab, 0xda, 0xcf, 0x86, 0x8f, 0xc2, 0x8a, 0x39, 0xc6, 0xe6, 0x69, 0x59, 0x97, 0xb6, 0x1a, 0x43}},
{Offset: 655360, Size: 0x20000, Hash: []uint8{0x38, 0x8e, 0x44, 0xcb, 0x30, 0xd8, 0x90, 0xf, 0xce, 0x7, 0x4b, 0x58, 0x86, 0xde, 0xce, 0x59, 0xa2, 0x46, 0xd2, 0xf9, 0xba, 0xaf, 0x35, 0x87, 0x38, 0xdf, 0xd2, 0xd, 0xf9, 0x45, 0xed, 0x91}},
{Offset: 786432, Size: 0x20000, Hash: []uint8{0x32, 0x28, 0xcd, 0xf, 0x37, 0x21, 0xe5, 0xd4, 0x1e, 0x58, 0x87, 0x73, 0x8e, 0x36, 0xdf, 0xb2, 0x70, 0x78, 0x56, 0xc3, 0x42, 0xff, 0xf7, 0x8f, 0x37, 0x95, 0x0, 0x26, 0xa, 0xac, 0x54, 0x72}},
{Offset: 917504, Size: 0x20000, Hash: []uint8{0x96, 0x6b, 0x15, 0x6b, 0xc4, 0xf, 0x19, 0x18, 0xca, 0xbb, 0x5f, 0xd6, 0xbb, 0xa2, 0xc6, 0x2a, 0xac, 0xbb, 0x8a, 0xb9, 0xce, 0xec, 0x4c, 0xdb, 0x78, 0xec, 0x57, 0x5d, 0x33, 0xf9, 0x8e, 0xaf}},
}
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var folders = []string{"default"}
func setUpFile(filename string, blockNumbers []int) protocol.FileInfo {
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// Create existing file
existingBlocks := make([]protocol.BlockInfo, len(blockNumbers))
for i := range blockNumbers {
existingBlocks[i] = blocks[blockNumbers[i]]
}
return protocol.FileInfo{
Name: filename,
Blocks: existingBlocks,
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}
}
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func setUpModel(file protocol.FileInfo) *Model {
db := db.OpenMemory()
model := NewModel(defaultConfig, protocol.LocalDeviceID, "syncthing", "dev", db, nil)
model.AddFolder(defaultFolderConfig)
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// Update index
model.updateLocalsFromScanning("default", []protocol.FileInfo{file})
return model
}
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func setUpSendReceiveFolder(model *Model) *sendReceiveFolder {
f := &sendReceiveFolder{
folder: folder{
stateTracker: newStateTracker("default"),
model: model,
initialScanFinished: make(chan struct{}),
ctx: context.TODO(),
},
fs: fs.NewMtimeFS(fs.NewFilesystem(fs.FilesystemTypeBasic, "testdata"), db.NewNamespacedKV(model.db, "mtime")),
queue: newJobQueue(),
errors: make(map[string]string),
errorsMut: sync.NewMutex(),
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}
// Folders are never actually started, so no initial scan will be done
close(f.initialScanFinished)
return f
}
// Layout of the files: (indexes from the above array)
// 12345678 - Required file
// 02005008 - Existing file (currently in the index)
// 02340070 - Temp file on the disk
func TestHandleFile(t *testing.T) {
// After the diff between required and existing we should:
// Copy: 2, 5, 8
// Pull: 1, 3, 4, 6, 7
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existingBlocks := []int{0, 2, 0, 0, 5, 0, 0, 8}
existingFile := setUpFile("filex", existingBlocks)
requiredFile := existingFile
requiredFile.Blocks = blocks[1:]
m := setUpModel(existingFile)
f := setUpSendReceiveFolder(m)
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copyChan := make(chan copyBlocksState, 1)
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f.handleFile(requiredFile, copyChan, nil)
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// Receive the results
toCopy := <-copyChan
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if len(toCopy.blocks) != 8 {
t.Errorf("Unexpected count of copy blocks: %d != 8", len(toCopy.blocks))
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}
for _, block := range blocks[1:] {
found := false
for _, toCopyBlock := range toCopy.blocks {
if string(toCopyBlock.Hash) == string(block.Hash) {
found = true
break
}
}
if !found {
t.Errorf("Did not find block %s", block.String())
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}
}
}
func TestHandleFileWithTemp(t *testing.T) {
// After diff between required and existing we should:
// Copy: 2, 5, 8
// Pull: 1, 3, 4, 6, 7
// After dropping out blocks already on the temp file we should:
// Copy: 5, 8
// Pull: 1, 6
existingBlocks := []int{0, 2, 0, 0, 5, 0, 0, 8}
existingFile := setUpFile("file", existingBlocks)
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requiredFile := existingFile
requiredFile.Blocks = blocks[1:]
m := setUpModel(existingFile)
f := setUpSendReceiveFolder(m)
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copyChan := make(chan copyBlocksState, 1)
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f.handleFile(requiredFile, copyChan, nil)
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// Receive the results
toCopy := <-copyChan
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if len(toCopy.blocks) != 4 {
t.Errorf("Unexpected count of copy blocks: %d != 4", len(toCopy.blocks))
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}
for _, idx := range []int{1, 5, 6, 8} {
found := false
block := blocks[idx]
for _, toCopyBlock := range toCopy.blocks {
if string(toCopyBlock.Hash) == string(block.Hash) {
found = true
break
}
}
if !found {
t.Errorf("Did not find block %s", block.String())
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}
}
}
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func TestCopierFinder(t *testing.T) {
// After diff between required and existing we should:
// Copy: 1, 2, 3, 4, 6, 7, 8
// Since there is no existing file, nor a temp file
// After dropping out blocks found locally:
// Pull: 1, 5, 6, 8
tempFile := filepath.Join("testdata", fs.TempName("file2"))
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err := os.Remove(tempFile)
if err != nil && !os.IsNotExist(err) {
t.Error(err)
}
existingBlocks := []int{0, 2, 3, 4, 0, 0, 7, 0}
existingFile := setUpFile(fs.TempName("file"), existingBlocks)
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requiredFile := existingFile
requiredFile.Blocks = blocks[1:]
requiredFile.Name = "file2"
m := setUpModel(existingFile)
f := setUpSendReceiveFolder(m)
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copyChan := make(chan copyBlocksState)
pullChan := make(chan pullBlockState, 4)
finisherChan := make(chan *sharedPullerState, 1)
// Run a single fetcher routine
go f.copierRoutine(copyChan, pullChan, finisherChan)
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f.handleFile(requiredFile, copyChan, finisherChan)
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pulls := []pullBlockState{<-pullChan, <-pullChan, <-pullChan, <-pullChan}
finish := <-finisherChan
select {
case <-pullChan:
t.Fatal("Pull channel has data to be read")
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case <-finisherChan:
t.Fatal("Finisher channel has data to be read")
default:
}
// Verify that the right blocks went into the pull list.
// They are pulled in random order.
for _, idx := range []int{1, 5, 6, 8} {
found := false
block := blocks[idx]
for _, pulledBlock := range pulls {
if string(pulledBlock.block.Hash) == string(block.Hash) {
found = true
break
}
}
if !found {
t.Errorf("Did not find block %s", block.String())
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}
if string(finish.file.Blocks[idx-1].Hash) != string(blocks[idx].Hash) {
t.Errorf("Block %d mismatch: %s != %s", idx, finish.file.Blocks[idx-1].String(), blocks[idx].String())
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}
}
// Verify that the fetched blocks have actually been written to the temp file
blks, err := scanner.HashFile(context.TODO(), fs.NewFilesystem(fs.FilesystemTypeBasic, "."), tempFile, protocol.BlockSize, nil, false)
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if err != nil {
t.Log(err)
}
for _, eq := range []int{2, 3, 4, 7} {
if string(blks[eq-1].Hash) != string(blocks[eq].Hash) {
t.Errorf("Block %d mismatch: %s != %s", eq, blks[eq-1].String(), blocks[eq].String())
}
}
finish.fd.Close()
os.Remove(tempFile)
}
func TestWeakHash(t *testing.T) {
tempFile := filepath.Join("testdata", fs.TempName("weakhash"))
var shift int64 = 10
var size int64 = 1 << 20
expectBlocks := int(size / protocol.BlockSize)
expectPulls := int(shift / protocol.BlockSize)
if shift > 0 {
expectPulls++
}
cleanup := func() {
for _, path := range []string{tempFile, "testdata/weakhash"} {
os.Remove(path)
}
}
cleanup()
defer cleanup()
f, err := os.Create("testdata/weakhash")
if err != nil {
t.Error(err)
}
defer f.Close()
_, err = io.CopyN(f, rand.Reader, size)
if err != nil {
t.Error(err)
}
info, err := f.Stat()
if err != nil {
t.Error(err)
}
// Create two files, second file has `shifted` bytes random prefix, yet
// both are of the same length, for example:
// File 1: abcdefgh
// File 2: xyabcdef
f.Seek(0, os.SEEK_SET)
existing, err := scanner.Blocks(context.TODO(), f, protocol.BlockSize, size, nil, true)
if err != nil {
t.Error(err)
}
f.Seek(0, os.SEEK_SET)
remainder := io.LimitReader(f, size-shift)
prefix := io.LimitReader(rand.Reader, shift)
nf := io.MultiReader(prefix, remainder)
desired, err := scanner.Blocks(context.TODO(), nf, protocol.BlockSize, size, nil, true)
if err != nil {
t.Error(err)
}
existingFile := protocol.FileInfo{
Name: "weakhash",
Blocks: existing,
Size: size,
ModifiedS: info.ModTime().Unix(),
ModifiedNs: int32(info.ModTime().Nanosecond()),
}
desiredFile := protocol.FileInfo{
Name: "weakhash",
Size: size,
Blocks: desired,
ModifiedS: info.ModTime().Unix() + 1,
}
// Setup the model/pull environment
m := setUpModel(existingFile)
fo := setUpSendReceiveFolder(m)
copyChan := make(chan copyBlocksState)
pullChan := make(chan pullBlockState, expectBlocks)
finisherChan := make(chan *sharedPullerState, 1)
// Run a single fetcher routine
go fo.copierRoutine(copyChan, pullChan, finisherChan)
// Test 1 - no weak hashing, file gets fully repulled (`expectBlocks` pulls).
fo.WeakHashThresholdPct = 101
fo.handleFile(desiredFile, copyChan, finisherChan)
var pulls []pullBlockState
for len(pulls) < expectBlocks {
select {
case pull := <-pullChan:
pulls = append(pulls, pull)
case <-time.After(10 * time.Second):
t.Errorf("timed out, got %d pulls expected %d", len(pulls), expectPulls)
}
}
finish := <-finisherChan
select {
case <-pullChan:
t.Fatal("Pull channel has data to be read")
case <-finisherChan:
t.Fatal("Finisher channel has data to be read")
default:
}
finish.fd.Close()
if err := os.Remove(tempFile); err != nil && !os.IsNotExist(err) {
t.Error(err)
}
// Test 2 - using weak hash, expectPulls blocks pulled.
fo.WeakHashThresholdPct = -1
fo.handleFile(desiredFile, copyChan, finisherChan)
pulls = pulls[:0]
for len(pulls) < expectPulls {
select {
case pull := <-pullChan:
pulls = append(pulls, pull)
case <-time.After(10 * time.Second):
t.Errorf("timed out, got %d pulls expected %d", len(pulls), expectPulls)
}
}
finish = <-finisherChan
finish.fd.Close()
expectShifted := expectBlocks - expectPulls
if finish.copyOriginShifted != expectShifted {
t.Errorf("did not copy %d shifted", expectShifted)
}
}
// Test that updating a file removes its old blocks from the blockmap
func TestCopierCleanup(t *testing.T) {
iterFn := func(folder, file string, index int32) bool {
return true
}
// Create a file
file := setUpFile("test", []int{0})
m := setUpModel(file)
file.Blocks = []protocol.BlockInfo{blocks[1]}
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file.Version = file.Version.Update(protocol.LocalDeviceID.Short())
// Update index (removing old blocks)
m.updateLocalsFromScanning("default", []protocol.FileInfo{file})
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if m.finder.Iterate(folders, blocks[0].Hash, iterFn) {
t.Error("Unexpected block found")
}
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if !m.finder.Iterate(folders, blocks[1].Hash, iterFn) {
t.Error("Expected block not found")
}
file.Blocks = []protocol.BlockInfo{blocks[0]}
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file.Version = file.Version.Update(protocol.LocalDeviceID.Short())
// Update index (removing old blocks)
m.updateLocalsFromScanning("default", []protocol.FileInfo{file})
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if !m.finder.Iterate(folders, blocks[0].Hash, iterFn) {
t.Error("Unexpected block found")
}
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if m.finder.Iterate(folders, blocks[1].Hash, iterFn) {
t.Error("Expected block not found")
}
}
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// Make sure that the copier routine hashes the content when asked, and pulls
// if it fails to find the block.
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func TestLastResortPulling(t *testing.T) {
// Add a file to index (with the incorrect block representation, as content
// doesn't actually match the block list)
file := setUpFile("empty", []int{0})
m := setUpModel(file)
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// Pretend that we are handling a new file of the same content but
// with a different name (causing to copy that particular block)
file.Name = "newfile"
iterFn := func(folder, file string, index int32) bool {
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return true
}
f := setUpSendReceiveFolder(m)
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copyChan := make(chan copyBlocksState)
pullChan := make(chan pullBlockState, 1)
finisherChan := make(chan *sharedPullerState, 1)
// Run a single copier routine
go f.copierRoutine(copyChan, pullChan, finisherChan)
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f.handleFile(file, copyChan, finisherChan)
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// Copier should hash empty file, realise that the region it has read
// doesn't match the hash which was advertised by the block map, fix it
// and ask to pull the block.
<-pullChan
// Verify that it did fix the incorrect hash.
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if m.finder.Iterate(folders, blocks[0].Hash, iterFn) {
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t.Error("Found unexpected block")
}
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if !m.finder.Iterate(folders, scanner.SHA256OfNothing, iterFn) {
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t.Error("Expected block not found")
}
(<-finisherChan).fd.Close()
os.Remove(filepath.Join("testdata", fs.TempName("newfile")))
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}
func TestDeregisterOnFailInCopy(t *testing.T) {
file := setUpFile("filex", []int{0, 2, 0, 0, 5, 0, 0, 8})
defer os.Remove("testdata/" + fs.TempName("filex"))
db := db.OpenMemory()
m := NewModel(defaultConfig, protocol.LocalDeviceID, "syncthing", "dev", db, nil)
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m.AddFolder(defaultFolderConfig)
f := setUpSendReceiveFolder(m)
// queue.Done should be called by the finisher routine
f.queue.Push("filex", 0, time.Time{})
f.queue.Pop()
if f.queue.lenProgress() != 1 {
t.Fatal("Expected file in progress")
}
copyChan := make(chan copyBlocksState)
pullChan := make(chan pullBlockState)
finisherBufferChan := make(chan *sharedPullerState)
finisherChan := make(chan *sharedPullerState)
go f.copierRoutine(copyChan, pullChan, finisherBufferChan)
go f.finisherRoutine(finisherChan)
f.handleFile(file, copyChan, finisherChan)
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// Receive a block at puller, to indicate that at least a single copier
// loop has been performed.
toPull := <-pullChan
// Wait until copier is trying to pass something down to the puller again
time.Sleep(100 * time.Millisecond)
// Close the file
toPull.sharedPullerState.fail("test", os.ErrNotExist)
// Unblock copier
<-pullChan
select {
case state := <-finisherBufferChan:
// At this point the file should still be registered with both the job
// queue, and the progress emitter. Verify this.
if f.model.progressEmitter.lenRegistry() != 1 || f.queue.lenProgress() != 1 || f.queue.lenQueued() != 0 {
t.Fatal("Could not find file")
}
// Pass the file down the real finisher, and give it time to consume
finisherChan <- state
time.Sleep(100 * time.Millisecond)
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state.mut.Lock()
stateFd := state.fd
state.mut.Unlock()
if stateFd != nil {
t.Fatal("File not closed?")
}
if f.model.progressEmitter.lenRegistry() != 0 || f.queue.lenProgress() != 0 || f.queue.lenQueued() != 0 {
t.Fatal("Still registered", f.model.progressEmitter.lenRegistry(), f.queue.lenProgress(), f.queue.lenQueued())
}
// Doing it again should have no effect
finisherChan <- state
time.Sleep(100 * time.Millisecond)
if f.model.progressEmitter.lenRegistry() != 0 || f.queue.lenProgress() != 0 || f.queue.lenQueued() != 0 {
t.Fatal("Still registered", f.model.progressEmitter.lenRegistry(), f.queue.lenProgress(), f.queue.lenQueued())
}
case <-time.After(time.Second):
t.Fatal("Didn't get anything to the finisher")
}
}
func TestDeregisterOnFailInPull(t *testing.T) {
file := setUpFile("filex", []int{0, 2, 0, 0, 5, 0, 0, 8})
defer os.Remove("testdata/" + fs.TempName("filex"))
db := db.OpenMemory()
m := NewModel(defaultConfig, protocol.LocalDeviceID, "syncthing", "dev", db, nil)
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m.AddFolder(defaultFolderConfig)
f := setUpSendReceiveFolder(m)
// queue.Done should be called by the finisher routine
f.queue.Push("filex", 0, time.Time{})
f.queue.Pop()
if f.queue.lenProgress() != 1 {
t.Fatal("Expected file in progress")
}
copyChan := make(chan copyBlocksState)
pullChan := make(chan pullBlockState)
finisherBufferChan := make(chan *sharedPullerState)
finisherChan := make(chan *sharedPullerState)
go f.copierRoutine(copyChan, pullChan, finisherBufferChan)
go f.pullerRoutine(pullChan, finisherBufferChan)
go f.finisherRoutine(finisherChan)
f.handleFile(file, copyChan, finisherChan)
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// Receive at finisher, we should error out as puller has nowhere to pull
// from.
select {
case state := <-finisherBufferChan:
// At this point the file should still be registered with both the job
// queue, and the progress emitter. Verify this.
if f.model.progressEmitter.lenRegistry() != 1 || f.queue.lenProgress() != 1 || f.queue.lenQueued() != 0 {
t.Fatal("Could not find file")
}
// Pass the file down the real finisher, and give it time to consume
finisherChan <- state
time.Sleep(100 * time.Millisecond)
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state.mut.Lock()
stateFd := state.fd
state.mut.Unlock()
if stateFd != nil {
t.Fatal("File not closed?")
}
if f.model.progressEmitter.lenRegistry() != 0 || f.queue.lenProgress() != 0 || f.queue.lenQueued() != 0 {
t.Fatal("Still registered", f.model.progressEmitter.lenRegistry(), f.queue.lenProgress(), f.queue.lenQueued())
}
// Doing it again should have no effect
finisherChan <- state
time.Sleep(100 * time.Millisecond)
if f.model.progressEmitter.lenRegistry() != 0 || f.queue.lenProgress() != 0 || f.queue.lenQueued() != 0 {
t.Fatal("Still registered", f.model.progressEmitter.lenRegistry(), f.queue.lenProgress(), f.queue.lenQueued())
}
case <-time.After(time.Second):
t.Fatal("Didn't get anything to the finisher")
}
}