syncthing/lib/db/meta_test.go
Jakob Borg 0b610017ea lib/db: Correct metadata recalculation (fixes #6381) (#6382)
If we decide to recalculate the metadata we shouldn't start from
whatever we loaded from the database, as that data is wrong. We should
start from a clean slate.
2020-02-28 11:17:02 +01:00

178 lines
4.9 KiB
Go

// Copyright (C) 2018 The Syncthing Authors.
//
// 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/.
package db
import (
"math/bits"
"sort"
"testing"
"github.com/syncthing/syncthing/lib/db/backend"
"github.com/syncthing/syncthing/lib/fs"
"github.com/syncthing/syncthing/lib/protocol"
)
func TestEachFlagBit(t *testing.T) {
cases := []struct {
flags uint32
iterations int
}{
{0, 0},
{1<<0 | 1<<3, 2},
{1 << 0, 1},
{1 << 31, 1},
{1<<10 | 1<<20 | 1<<30, 3},
}
for _, tc := range cases {
var flags uint32
iterations := 0
eachFlagBit(tc.flags, func(f uint32) {
iterations++
flags |= f
if bits.OnesCount32(f) != 1 {
t.Error("expected exactly one bit to be set in every call")
}
})
if flags != tc.flags {
t.Errorf("expected 0x%x flags, got 0x%x", tc.flags, flags)
}
if iterations != tc.iterations {
t.Errorf("expected %d iterations, got %d", tc.iterations, iterations)
}
}
}
func TestMetaDevices(t *testing.T) {
d1 := protocol.DeviceID{1}
d2 := protocol.DeviceID{2}
meta := newMetadataTracker()
meta.addFile(d1, protocol.FileInfo{Sequence: 1})
meta.addFile(d1, protocol.FileInfo{Sequence: 2, LocalFlags: 1})
meta.addFile(d2, protocol.FileInfo{Sequence: 1})
meta.addFile(d2, protocol.FileInfo{Sequence: 2, LocalFlags: 2})
meta.addFile(protocol.LocalDeviceID, protocol.FileInfo{Sequence: 1})
// There are five device/flags combos
if l := len(meta.counts.Counts); l < 5 {
t.Error("expected at least five buckets, not", l)
}
// There are only two non-local devices
devs := meta.devices()
if l := len(devs); l != 2 {
t.Fatal("expected two devices, not", l)
}
// Check that we got the two devices we expect
sort.Slice(devs, func(a, b int) bool {
return devs[a].Compare(devs[b]) == -1
})
if devs[0] != d1 {
t.Error("first device should be d1")
}
if devs[1] != d2 {
t.Error("second device should be d2")
}
}
func TestMetaSequences(t *testing.T) {
d1 := protocol.DeviceID{1}
meta := newMetadataTracker()
meta.addFile(d1, protocol.FileInfo{Sequence: 1})
meta.addFile(d1, protocol.FileInfo{Sequence: 2, RawInvalid: true})
meta.addFile(d1, protocol.FileInfo{Sequence: 3})
meta.addFile(d1, protocol.FileInfo{Sequence: 4, RawInvalid: true})
meta.addFile(protocol.LocalDeviceID, protocol.FileInfo{Sequence: 1})
meta.addFile(protocol.LocalDeviceID, protocol.FileInfo{Sequence: 2})
meta.addFile(protocol.LocalDeviceID, protocol.FileInfo{Sequence: 3, LocalFlags: 1})
meta.addFile(protocol.LocalDeviceID, protocol.FileInfo{Sequence: 4, LocalFlags: 2})
if seq := meta.Sequence(d1); seq != 4 {
t.Error("sequence of first device should be 4, not", seq)
}
if seq := meta.Sequence(protocol.LocalDeviceID); seq != 4 {
t.Error("sequence of first device should be 4, not", seq)
}
}
func TestRecalcMeta(t *testing.T) {
ldb := NewLowlevel(backend.OpenMemory())
defer ldb.Close()
// Add some files
s1 := NewFileSet("test", fs.NewFilesystem(fs.FilesystemTypeFake, "fake"), ldb)
files := []protocol.FileInfo{
{Name: "a", Size: 1000},
{Name: "b", Size: 2000},
}
s1.Update(protocol.LocalDeviceID, files)
// Verify local/global size
snap := s1.Snapshot()
ls := snap.LocalSize()
gs := snap.GlobalSize()
snap.Release()
if ls.Bytes != 3000 {
t.Fatalf("Wrong initial local byte count, %d != 3000", ls.Bytes)
}
if gs.Bytes != 3000 {
t.Fatalf("Wrong initial global byte count, %d != 3000", gs.Bytes)
}
// Reach into the database to make the metadata tracker intentionally
// wrong and out of date
curSeq := s1.meta.Sequence(protocol.LocalDeviceID)
tran, err := ldb.newReadWriteTransaction()
if err != nil {
t.Fatal(err)
}
s1.meta.mut.Lock()
s1.meta.countsPtr(protocol.LocalDeviceID, 0).Sequence = curSeq - 1 // too low
s1.meta.countsPtr(protocol.LocalDeviceID, 0).Bytes = 1234 // wrong
s1.meta.countsPtr(protocol.GlobalDeviceID, 0).Bytes = 1234 // wrong
s1.meta.dirty = true
s1.meta.mut.Unlock()
if err := s1.meta.toDB(tran, []byte("test")); err != nil {
t.Fatal(err)
}
if err := tran.Commit(); err != nil {
t.Fatal(err)
}
// Verify that our bad data "took"
snap = s1.Snapshot()
ls = snap.LocalSize()
gs = snap.GlobalSize()
snap.Release()
if ls.Bytes != 1234 {
t.Fatalf("Wrong changed local byte count, %d != 1234", ls.Bytes)
}
if gs.Bytes != 1234 {
t.Fatalf("Wrong changed global byte count, %d != 1234", gs.Bytes)
}
// Create a new fileset, which will realize the inconsistency and recalculate
s2 := NewFileSet("test", fs.NewFilesystem(fs.FilesystemTypeFake, "fake"), ldb)
// Verify local/global size
snap = s2.Snapshot()
ls = snap.LocalSize()
gs = snap.GlobalSize()
snap.Release()
if ls.Bytes != 3000 {
t.Fatalf("Wrong fixed local byte count, %d != 3000", ls.Bytes)
}
if gs.Bytes != 3000 {
t.Fatalf("Wrong fixed global byte count, %d != 3000", gs.Bytes)
}
}