mirror of
https://github.com/ceph/ceph-csi.git
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f6ae612003
RT, reference tracker, is key-based implementation of a reference counter. Unlike an integer-based counter, RT counts references by tracking unique keys. This allows accounting in situations where idempotency must be preserved. It guarantees there will be no duplicit increments or decrements of the counter. Signed-off-by: Robert Vasek <robert.vasek@cern.ch>
424 lines
10 KiB
Go
424 lines
10 KiB
Go
/*
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Copyright 2022 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package v1
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import (
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goerrors "errors"
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"testing"
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"github.com/ceph/ceph-csi/internal/util/reftracker/errors"
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"github.com/ceph/ceph-csi/internal/util/reftracker/radoswrapper"
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"github.com/ceph/ceph-csi/internal/util/reftracker/reftype"
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"github.com/stretchr/testify/assert"
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)
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func TestV1Read(t *testing.T) {
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t.Parallel()
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const rtName = "hello-rt"
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var (
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gen = uint64(0)
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validObj = radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {
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Oid: rtName,
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Data: []byte{0, 0, 0, 0},
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Omap: make(map[string][]byte),
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},
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},
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})
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invalidObjs = []*radoswrapper.FakeIOContext{
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// Missing object.
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radoswrapper.NewFakeIOContext(radoswrapper.NewFakeRados()),
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// Bad generation number.
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radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {
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Ver: 123,
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Oid: rtName,
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Data: []byte{0, 0, 0, 0},
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},
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},
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}),
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// Refcount overflow.
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radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {
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Oid: rtName,
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Data: []byte{0xFF, 0xFF, 0xFF, 0xFF},
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},
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},
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}),
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}
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refsToAdd = map[string]struct{}{"ref1": {}}
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)
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err := Add(validObj, rtName, gen, refsToAdd)
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assert.NoError(t, err)
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for i := range invalidObjs {
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err = Add(invalidObjs[i], rtName, gen, refsToAdd)
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assert.Error(t, err)
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}
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// Check for correct error type for wrong gen num.
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err = Add(invalidObjs[1], rtName, gen, refsToAdd)
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assert.Error(t, err)
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assert.True(t, goerrors.Is(err, errors.ErrObjectOutOfDate))
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}
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func TestV1Init(t *testing.T) {
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t.Parallel()
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const rtName = "hello-rt"
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var (
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emptyRados = radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{},
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})
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alreadyExists = radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {},
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},
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})
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refsToInit = map[string]struct{}{"ref1": {}}
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)
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err := Init(emptyRados, rtName, refsToInit)
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assert.NoError(t, err)
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err = Init(alreadyExists, rtName, refsToInit)
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assert.Error(t, err)
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}
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func TestV1Add(t *testing.T) {
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t.Parallel()
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const rtName = "hello-rt"
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var (
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shouldSucceed = []struct {
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before *radoswrapper.FakeObj
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refsToAdd map[string]struct{}
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after *radoswrapper.FakeObj
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}{
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// Add a new ref.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToAdd: map[string]struct{}{
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"ref2": {},
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 1,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(2).toBytes(),
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},
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},
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// Try to add a ref that's already tracked.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToAdd: map[string]struct{}{
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"ref1": {},
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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},
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// Try to add a ref that's masked.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Mask),
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},
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Data: refCount(1).toBytes(),
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},
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refsToAdd: map[string]struct{}{
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"ref1": {},
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Mask),
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},
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Data: refCount(1).toBytes(),
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},
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},
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}
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shouldFail = []*radoswrapper.FakeIOContext{
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// Missing object.
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radoswrapper.NewFakeIOContext(radoswrapper.NewFakeRados()),
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// Bad generation number.
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radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {
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Ver: 123,
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Oid: rtName,
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Data: []byte{0, 0, 0, 0},
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},
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},
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}),
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// Refcount overflow.
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radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {
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Oid: rtName,
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Data: []byte{0xFF, 0xFF, 0xFF, 0xFF},
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},
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},
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}),
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}
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)
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for i := range shouldSucceed {
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ioctx := radoswrapper.NewFakeIOContext(radoswrapper.NewFakeRados())
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ioctx.Rados.Objs[rtName] = shouldSucceed[i].before
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err := Add(ioctx, rtName, 0, shouldSucceed[i].refsToAdd)
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assert.NoError(t, err)
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assert.Equal(t, shouldSucceed[i].after, ioctx.Rados.Objs[rtName])
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}
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for i := range shouldFail {
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err := Add(shouldFail[i], rtName, 0, map[string]struct{}{"ref1": {}})
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assert.Error(t, err)
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}
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// Check for correct error type for wrong gen num.
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err := Add(shouldFail[1], rtName, 0, map[string]struct{}{"ref1": {}})
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assert.Error(t, err)
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assert.True(t, goerrors.Is(err, errors.ErrObjectOutOfDate))
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}
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func TestV1Remove(t *testing.T) {
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t.Parallel()
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const rtName = "hello-rt"
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var (
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shouldSucceed = []struct {
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before *radoswrapper.FakeObj
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refsToRemove map[string]reftype.RefType
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after *radoswrapper.FakeObj
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deleted bool
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}{
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// Remove without deleting the reftracker object.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(2).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref1": reftype.Normal,
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 1,
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Omap: map[string][]byte{
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"ref2": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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deleted: false,
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},
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// Remove and delete the reftracker object.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref1": reftype.Normal,
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},
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after: nil,
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deleted: true,
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},
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// Remove and delete the reftracker object.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref1": reftype.Normal,
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},
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after: nil,
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deleted: true,
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},
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// Mask a ref without deleting reftracker object.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(2).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref2": reftype.Mask,
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 1,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Mask),
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},
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Data: refCount(1).toBytes(),
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},
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deleted: false,
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},
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// Mask a ref and delete reftracker object.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref1": reftype.Mask,
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},
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after: nil,
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deleted: true,
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},
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// Add a masking ref.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref2": reftype.Mask,
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 1,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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"ref2": reftype.ToBytes(reftype.Mask),
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},
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Data: refCount(1).toBytes(),
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},
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deleted: false,
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},
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// Try to remove non-existent ref.
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{
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before: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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refsToRemove: map[string]reftype.RefType{
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"ref2": reftype.Normal,
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},
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after: &radoswrapper.FakeObj{
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Oid: rtName,
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Ver: 0,
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Omap: map[string][]byte{
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"ref1": reftype.ToBytes(reftype.Normal),
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},
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Data: refCount(1).toBytes(),
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},
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deleted: false,
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},
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}
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// Bad generation number.
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badGen = radoswrapper.NewFakeIOContext(&radoswrapper.FakeRados{
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Objs: map[string]*radoswrapper.FakeObj{
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rtName: {
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Ver: 123,
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},
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},
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})
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)
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for i := range shouldSucceed {
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ioctx := radoswrapper.NewFakeIOContext(radoswrapper.NewFakeRados())
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ioctx.Rados.Objs[rtName] = shouldSucceed[i].before
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deleted, err := Remove(ioctx, rtName, 0, shouldSucceed[i].refsToRemove)
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assert.NoError(t, err)
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assert.Equal(t, shouldSucceed[i].deleted, deleted)
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assert.Equal(t, shouldSucceed[i].after, ioctx.Rados.Objs[rtName])
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}
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_, err := Remove(badGen, rtName, 0, map[string]reftype.RefType{"ref": reftype.Normal})
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assert.Error(t, err)
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assert.True(t, goerrors.Is(err, errors.ErrObjectOutOfDate))
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}
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