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Handle state with input event as new events (#1415)

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* SendEventWithState events as new

* Use cumulative state IDs for final event

* Error wrapping in calculateAndSetState

* Handle overwriting same event type and state key

* Hacky way to spot historical events

* Don't exclude from sync

* Don't generate output events when rewriting forward extremities

* Update output event check

* Historical output events

* Define output room event type

* Notify key changes on state

* Don't send our membership event twice

* Deduplicate state entries

* Tweaks

* Remove unnecessary nolint

* Fix current state upsert in sync API

* Send auth events as outliers, state events as rewrite

* Sync API don't consume state events

* Process events actually

* Improve outlier check

* Fix local room check

* Remove extra room check, it seems to break the whole damn world

* Fix federated join check

* Fix nil pointer exception

* Better comments on DeduplicateStateEntries

* Reflow forced federated joins

* Don't force federated join for possibly even local invites

* Comment SendEventWithState better

* Rewrite room state in sync API storage

* Add TODO

* Clean up all room data when receiving create event

* Don't generate output events for rewrites, but instead notify that state is rewritten on the final new event

* Rename to PurgeRoom

* Exclude backfilled messages from /sync

* Split out rewriting state from updating state from state res

Co-authored-by: Kegan Dougal <kegan@matrix.org>
This commit is contained in:
Neil Alexander 2020-09-15 11:17:46 +01:00 committed by GitHub
parent 8dc9506210
commit 965f068d1a
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
23 changed files with 616 additions and 30 deletions
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7
federationsender/internal/perform.go
View file

@ -98,7 +98,10 @@ func (r *FederationSenderInternalAPI) PerformJoin(
response.LastError = &gomatrix.HTTPError{
Code: 0,
WrappedError: nil,
Message: lastErr.Error(),
Message: "Unknown HTTP error",
}
if lastErr != nil {
response.LastError.Message = lastErr.Error()
}
}
@ -195,7 +198,7 @@ func (r *FederationSenderInternalAPI) performJoinUsingServer(
// If we successfully performed a send_join above then the other
// server now thinks we're a part of the room. Send the newly
// returned state to the roomserver to update our local view.
if err = roomserverAPI.SendEventWithState(
if err = roomserverAPI.SendEventWithRewrite(
ctx, r.rsAPI,
respState,
event.Headered(respMakeJoin.RoomVersion),

4
roomserver/api/input.go
View file

@ -33,6 +33,10 @@ const (
// KindBackfill event extend the contiguous graph going backwards.
// They always have state.
KindBackfill = 3
// KindRewrite events are used when rewriting the head of the room
// graph with entirely new state. The output events generated will
// be state events rather than timeline events.
KindRewrite = 4
)
// DoNotSendToOtherServers tells us not to send the event to other matrix

14
roomserver/api/output.go
View file

@ -68,6 +68,17 @@ type OutputEvent struct {
NewPeek *OutputNewPeek `json:"new_peek,omitempty"`
}
// Type of the OutputNewRoomEvent.
type OutputRoomEventType int
const (
// The event is a timeline event and likely just happened.
OutputRoomTimeline OutputRoomEventType = iota
// The event is a state event and quite possibly happened in the past.
OutputRoomState
)
// An OutputNewRoomEvent is written when the roomserver receives a new event.
// It contains the full matrix room event and enough information for a
// consumer to construct the current state of the room and the state before the
@ -80,6 +91,9 @@ type OutputEvent struct {
type OutputNewRoomEvent struct {
// The Event.
Event gomatrixserverlib.HeaderedEvent `json:"event"`
// Does the event completely rewrite the room state? If so, then AddsStateEventIDs
// will contain the entire room state.
RewritesState bool `json:"rewrites_state"`
// The latest events in the room after this event.
// This can be used to set the prev events for new events in the room.
// This also can be used to get the full current state after this event.

101
roomserver/api/wrapper.go
View file

@ -80,6 +80,107 @@ func SendEventWithState(
return SendInputRoomEvents(ctx, rsAPI, ires)
}
// SendEventWithRewrite writes an event with KindNew to the roomserver along
// with a number of rewrite and outlier events for state and auth events
// respectively.
func SendEventWithRewrite(
ctx context.Context, rsAPI RoomserverInternalAPI, state *gomatrixserverlib.RespState,
event gomatrixserverlib.HeaderedEvent, haveEventIDs map[string]bool,
) error {
isCurrentState := map[string]struct{}{}
for _, se := range state.StateEvents {
isCurrentState[se.EventID()] = struct{}{}
}
authAndStateEvents, err := state.Events()
if err != nil {
return err
}
var ires []InputRoomEvent
var stateIDs []string
// This function generates three things:
// A - A set of "rewrite" events, which will form the newly rewritten
// state before the event, which includes every rewrite event that
// came before it in its state
// B - A set of "outlier" events, which are auth events but not part
// of the rewritten state
// C - A "new" event, which include all of the rewrite events in its
// state
for _, authOrStateEvent := range authAndStateEvents {
if authOrStateEvent.StateKey() == nil {
continue
}
if haveEventIDs[authOrStateEvent.EventID()] {
continue
}
if event.StateKey() == nil {
continue
}
// We will handle an event as if it's an outlier if one of the
// following conditions is true:
storeAsOutlier := false
if authOrStateEvent.Type() == event.Type() && *authOrStateEvent.StateKey() == *event.StateKey() {
// The event is a state event but the input event is going to
// replace it, therefore it can't be added to the state or we'll
// get duplicate state keys in the state block. We'll send it
// as an outlier because we don't know if something will be
// referring to it as an auth event, but need it to be stored
// just in case.
storeAsOutlier = true
} else if _, ok := isCurrentState[authOrStateEvent.EventID()]; !ok {
// The event is an auth event and isn't a part of the state set.
// We'll send it as an outlier because we need it to be stored
// in case something is referring to it as an auth event.
storeAsOutlier = true
}
if storeAsOutlier {
ires = append(ires, InputRoomEvent{
Kind: KindOutlier,
Event: authOrStateEvent.Headered(event.RoomVersion),
AuthEventIDs: authOrStateEvent.AuthEventIDs(),
})
continue
}
// If the event isn't an outlier then we'll instead send it as a
// rewrite event, so that it'll form part of the rewritten state.
// These events will go through the membership and latest event
// updaters and we will generate output events, but they will be
// flagged as non-current (i.e. didn't just happen) events.
// Each of these rewrite events includes all of the rewrite events
// that came before in their StateEventIDs.
ires = append(ires, InputRoomEvent{
Kind: KindRewrite,
Event: authOrStateEvent.Headered(event.RoomVersion),
AuthEventIDs: authOrStateEvent.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
// Add the event ID into the StateEventIDs of all subsequent
// rewrite events, and the new event.
stateIDs = append(stateIDs, authOrStateEvent.EventID())
}
// Send the final event as a new event, which will generate
// a timeline output event for it. All of the rewrite events
// that came before will be sent as StateEventIDs, forming a
// new clean state before the event.
ires = append(ires, InputRoomEvent{
Kind: KindNew,
Event: event,
AuthEventIDs: event.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
return SendInputRoomEvents(ctx, rsAPI, ires)
}
// SendInputRoomEvents to the roomserver.
func SendInputRoomEvents(
ctx context.Context, rsAPI RoomserverInternalAPI, ires []InputRoomEvent,

2
roomserver/internal/helpers/auth.go
View file

@ -36,7 +36,7 @@ func CheckAuthEvents(
if err != nil {
return nil, err
}
// TODO: check for duplicate state keys here.
authStateEntries = types.DeduplicateStateEntries(authStateEntries)
// Work out which of the state events we actually need.
stateNeeded := gomatrixserverlib.StateNeededForAuth([]gomatrixserverlib.Event{event.Unwrap()})

26
roomserver/internal/input/input_events.go
View file

@ -86,7 +86,7 @@ func (r *Inputer) processRoomEvent(
"event_id": event.EventID(),
"type": event.Type(),
"room": event.RoomID(),
}).Info("Stored outlier")
}).Debug("Stored outlier")
return event.EventID(), nil
}
@ -107,6 +107,15 @@ func (r *Inputer) processRoomEvent(
}
}
if input.Kind == api.KindRewrite {
logrus.WithFields(logrus.Fields{
"event_id": event.EventID(),
"type": event.Type(),
"room": event.RoomID(),
}).Debug("Stored rewrite")
return event.EventID(), nil
}
if err = r.updateLatestEvents(
ctx, // context
roomInfo, // room info for the room being updated
@ -114,6 +123,7 @@ func (r *Inputer) processRoomEvent(
event, // event
input.SendAsServer, // send as server
input.TransactionID, // transaction ID
input.HasState, // rewrites state?
); err != nil {
return "", fmt.Errorf("r.updateLatestEvents: %w", err)
}
@ -167,19 +177,25 @@ func (r *Inputer) calculateAndSetState(
// Check that those state events are in the database and store the state.
var entries []types.StateEntry
if entries, err = r.DB.StateEntriesForEventIDs(ctx, input.StateEventIDs); err != nil {
return err
return fmt.Errorf("r.DB.StateEntriesForEventIDs: %w", err)
}
entries = types.DeduplicateStateEntries(entries)
if stateAtEvent.BeforeStateSnapshotNID, err = r.DB.AddState(ctx, roomInfo.RoomNID, nil, entries); err != nil {
return err
return fmt.Errorf("r.DB.AddState: %w", err)
}
} else {
stateAtEvent.Overwrite = false
// We haven't been told what the state at the event is so we need to calculate it from the prev_events
if stateAtEvent.BeforeStateSnapshotNID, err = roomState.CalculateAndStoreStateBeforeEvent(ctx, event); err != nil {
return err
return fmt.Errorf("roomState.CalculateAndStoreStateBeforeEvent: %w", err)
}
}
return r.DB.SetState(ctx, stateAtEvent.EventNID, stateAtEvent.BeforeStateSnapshotNID)
err = r.DB.SetState(ctx, stateAtEvent.EventNID, stateAtEvent.BeforeStateSnapshotNID)
if err != nil {
return fmt.Errorf("r.DB.SetState: %w", err)
}
return nil
}

12
roomserver/internal/input/input_latest_events.go
View file

@ -54,6 +54,7 @@ func (r *Inputer) updateLatestEvents(
event gomatrixserverlib.Event,
sendAsServer string,
transactionID *api.TransactionID,
rewritesState bool,
) (err error) {
updater, err := r.DB.GetLatestEventsForUpdate(ctx, *roomInfo)
if err != nil {
@ -71,6 +72,7 @@ func (r *Inputer) updateLatestEvents(
event: event,
sendAsServer: sendAsServer,
transactionID: transactionID,
rewritesState: rewritesState,
}
if err = u.doUpdateLatestEvents(); err != nil {
@ -93,6 +95,7 @@ type latestEventsUpdater struct {
stateAtEvent types.StateAtEvent
event gomatrixserverlib.Event
transactionID *api.TransactionID
rewritesState bool
// Which server to send this event as.
sendAsServer string
// The eventID of the event that was processed before this one.
@ -178,7 +181,8 @@ func (u *latestEventsUpdater) doUpdateLatestEvents() error {
return fmt.Errorf("u.api.updateMemberships: %w", err)
}
update, err := u.makeOutputNewRoomEvent()
var update *api.OutputEvent
update, err = u.makeOutputNewRoomEvent()
if err != nil {
return fmt.Errorf("u.makeOutputNewRoomEvent: %w", err)
}
@ -305,6 +309,7 @@ func (u *latestEventsUpdater) makeOutputNewRoomEvent() (*api.OutputEvent, error)
ore := api.OutputNewRoomEvent{
Event: u.event.Headered(u.roomInfo.RoomVersion),
RewritesState: u.rewritesState,
LastSentEventID: u.lastEventIDSent,
LatestEventIDs: latestEventIDs,
TransactionID: u.transactionID,
@ -337,6 +342,11 @@ func (u *latestEventsUpdater) makeOutputNewRoomEvent() (*api.OutputEvent, error)
return nil, fmt.Errorf("failed to load add_state_events from db: %w", err)
}
}
// State is rewritten if the input room event HasState and we actually produced a delta on state events.
// Without this check, /get_missing_events which produce events with associated (but not complete) state
// will incorrectly purge the room and set it to no state. TODO: This is likely flakey, as if /gme produced
// a state conflict res which just so happens to include 2+ events we might purge the room state downstream.
ore.RewritesState = len(ore.AddsStateEventIDs) > 1
return &api.OutputEvent{
Type: api.OutputTypeNewRoomEvent,

30
roomserver/internal/perform/perform_join.go
View file

@ -183,33 +183,33 @@ func (r *Joiner) performJoinRoomByID(
return "", fmt.Errorf("eb.SetContent: %w", err)
}
// First work out if this is in response to an existing invite
// from a federated server. If it is then we avoid the situation
// where we might think we know about a room in the following
// section but don't know the latest state as all of our users
// have left.
// Force a federated join if we aren't in the room and we've been
// given some server names to try joining by.
serverInRoom, _ := helpers.IsServerCurrentlyInRoom(ctx, r.DB, r.ServerName, req.RoomIDOrAlias)
forceFederatedJoin := len(req.ServerNames) > 0 && !serverInRoom
// Force a federated join if we're dealing with a pending invite
// and we aren't in the room.
isInvitePending, inviteSender, _, err := helpers.IsInvitePending(ctx, r.DB, req.RoomIDOrAlias, req.UserID)
if err == nil && isInvitePending && !serverInRoom {
// Check if there's an invite pending.
if err == nil && isInvitePending {
_, inviterDomain, ierr := gomatrixserverlib.SplitID('@', inviteSender)
if ierr != nil {
return "", fmt.Errorf("gomatrixserverlib.SplitID: %w", err)
}
// Check that the domain isn't ours. If it's local then we don't
// need to do anything as our own copy of the room state will be
// up-to-date.
// If we were invited by someone from another server then we can
// assume they are in the room so we can join via them.
if inviterDomain != r.Cfg.Matrix.ServerName {
// Add the server of the person who invited us to the server list,
// as they should be a fairly good bet.
req.ServerNames = append(req.ServerNames, inviterDomain)
// Perform a federated room join.
return req.RoomIDOrAlias, r.performFederatedJoinRoomByID(ctx, req)
forceFederatedJoin = true
}
}
// If we should do a forced federated join then do that.
if forceFederatedJoin {
return req.RoomIDOrAlias, r.performFederatedJoinRoomByID(ctx, req)
}
// Try to construct an actual join event from the template.
// If this succeeds then it is a sign that the room already exists
// locally on the homeserver.

245
roomserver/roomserver_test.go
View file

@ -1,12 +1,15 @@
package roomserver
import (
"bytes"
"context"
"crypto/ed25519"
"encoding/json"
"fmt"
"os"
"reflect"
"testing"
"time"
"github.com/Shopify/sarama"
"github.com/matrix-org/dendrite/internal/caching"
@ -80,7 +83,73 @@ func deleteDatabase() {
}
}
func mustLoadEvents(t *testing.T, ver gomatrixserverlib.RoomVersion, events []json.RawMessage) []gomatrixserverlib.HeaderedEvent {
type fledglingEvent struct {
Type string
StateKey *string
Content interface{}
Sender string
RoomID string
}
func mustCreateEvents(t *testing.T, roomVer gomatrixserverlib.RoomVersion, events []fledglingEvent) (result []gomatrixserverlib.HeaderedEvent) {
t.Helper()
depth := int64(1)
seed := make([]byte, ed25519.SeedSize) // zero seed
key := ed25519.NewKeyFromSeed(seed)
var prevs []string
roomState := make(map[gomatrixserverlib.StateKeyTuple]string) // state -> event ID
for _, ev := range events {
eb := gomatrixserverlib.EventBuilder{
Sender: ev.Sender,
Depth: depth,
Type: ev.Type,
StateKey: ev.StateKey,
RoomID: ev.RoomID,
PrevEvents: prevs,
}
err := eb.SetContent(ev.Content)
if err != nil {
t.Fatalf("mustCreateEvent: failed to marshal event content %+v", ev.Content)
}
stateNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(&eb)
if err != nil {
t.Fatalf("mustCreateEvent: failed to work out auth_events : %s", err)
}
var authEvents []string
for _, tuple := range stateNeeded.Tuples() {
eventID := roomState[tuple]
if eventID != "" {
authEvents = append(authEvents, eventID)
}
}
eb.AuthEvents = authEvents
signedEvent, err := eb.Build(time.Now(), testOrigin, "ed25519:test", key, roomVer)
if err != nil {
t.Fatalf("mustCreateEvent: failed to sign event: %s", err)
}
depth++
prevs = []string{signedEvent.EventID()}
if ev.StateKey != nil {
roomState[gomatrixserverlib.StateKeyTuple{
EventType: ev.Type,
StateKey: *ev.StateKey,
}] = signedEvent.EventID()
}
result = append(result, signedEvent.Headered(roomVer))
}
return
}
func eventsJSON(events []gomatrixserverlib.Event) []json.RawMessage {
result := make([]json.RawMessage, len(events))
for i := range events {
result[i] = events[i].JSON()
}
return result
}
func mustLoadRawEvents(t *testing.T, ver gomatrixserverlib.RoomVersion, events []json.RawMessage) []gomatrixserverlib.HeaderedEvent {
t.Helper()
hs := make([]gomatrixserverlib.HeaderedEvent, len(events))
for i := range events {
e, err := gomatrixserverlib.NewEventFromTrustedJSON(events[i], false, ver)
@ -93,7 +162,8 @@ func mustLoadEvents(t *testing.T, ver gomatrixserverlib.RoomVersion, events []js
return hs
}
func mustSendEvents(t *testing.T, ver gomatrixserverlib.RoomVersion, events []json.RawMessage) (api.RoomserverInternalAPI, *dummyProducer, []gomatrixserverlib.HeaderedEvent) {
func mustCreateRoomserverAPI(t *testing.T) (api.RoomserverInternalAPI, *dummyProducer) {
t.Helper()
cfg := &config.Dendrite{}
cfg.Defaults()
cfg.Global.ServerName = testOrigin
@ -112,9 +182,14 @@ func mustSendEvents(t *testing.T, ver gomatrixserverlib.RoomVersion, events []js
Cfg: cfg,
}
rsAPI := NewInternalAPI(base, &test.NopJSONVerifier{})
hevents := mustLoadEvents(t, ver, events)
if err = api.SendEvents(ctx, rsAPI, hevents, testOrigin, nil); err != nil {
return NewInternalAPI(base, &test.NopJSONVerifier{}), dp
}
func mustSendEvents(t *testing.T, ver gomatrixserverlib.RoomVersion, events []json.RawMessage) (api.RoomserverInternalAPI, *dummyProducer, []gomatrixserverlib.HeaderedEvent) {
t.Helper()
rsAPI, dp := mustCreateRoomserverAPI(t)
hevents := mustLoadRawEvents(t, ver, events)
if err := api.SendEvents(ctx, rsAPI, hevents, testOrigin, nil); err != nil {
t.Errorf("failed to SendEvents: %s", err)
}
return rsAPI, dp, hevents
@ -170,3 +245,163 @@ func TestOutputRedactedEvent(t *testing.T) {
}
}
}
// This tests that rewriting state via KindRewrite works correctly.
// This creates a small room with a create/join/name state, then replays it
// with a new room name. We expect the output events to contain the original events,
// followed by a single OutputNewRoomEvent with RewritesState set to true with the
// rewritten state events (with the 2nd room name).
func TestOutputRewritesState(t *testing.T) {
roomID := "!foo:" + string(testOrigin)
alice := "@alice:" + string(testOrigin)
emptyKey := ""
originalEvents := mustCreateEvents(t, gomatrixserverlib.RoomVersionV6, []fledglingEvent{
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"creator": alice,
"room_version": "6",
},
StateKey: &emptyKey,
Type: gomatrixserverlib.MRoomCreate,
},
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"membership": "join",
},
StateKey: &alice,
Type: gomatrixserverlib.MRoomMember,
},
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"body": "hello world",
},
StateKey: nil,
Type: "m.room.message",
},
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"name": "Room Name",
},
StateKey: &emptyKey,
Type: "m.room.name",
},
})
rewriteEvents := mustCreateEvents(t, gomatrixserverlib.RoomVersionV6, []fledglingEvent{
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"creator": alice,
},
StateKey: &emptyKey,
Type: gomatrixserverlib.MRoomCreate,
},
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"membership": "join",
},
StateKey: &alice,
Type: gomatrixserverlib.MRoomMember,
},
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"name": "Room Name 2",
},
StateKey: &emptyKey,
Type: "m.room.name",
},
{
RoomID: roomID,
Sender: alice,
Content: map[string]interface{}{
"body": "hello world 2",
},
StateKey: nil,
Type: "m.room.message",
},
})
deleteDatabase()
rsAPI, producer := mustCreateRoomserverAPI(t)
defer deleteDatabase()
err := api.SendEvents(context.Background(), rsAPI, originalEvents, testOrigin, nil)
if err != nil {
t.Fatalf("failed to send original events: %s", err)
}
// assert we got them produced, this is just a sanity check and isn't the intention of this test
if len(producer.producedMessages) != len(originalEvents) {
t.Fatalf("SendEvents didn't result in same number of produced output events: got %d want %d", len(producer.producedMessages), len(originalEvents))
}
producer.producedMessages = nil // we aren't actually interested in these events, just the rewrite ones
var inputEvents []api.InputRoomEvent
// slowly build up the state IDs again, we're basically telling the roomserver what to store as a snapshot
var stateIDs []string
// skip the last event, we'll use this to tie together the rewrite as the KindNew event
for i := 0; i < len(rewriteEvents)-1; i++ {
ev := rewriteEvents[i]
inputEvents = append(inputEvents, api.InputRoomEvent{
Kind: api.KindRewrite,
Event: ev,
AuthEventIDs: ev.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
if ev.StateKey() != nil {
stateIDs = append(stateIDs, ev.EventID())
}
}
lastEv := rewriteEvents[len(rewriteEvents)-1]
inputEvents = append(inputEvents, api.InputRoomEvent{
Kind: api.KindNew,
Event: lastEv,
AuthEventIDs: lastEv.AuthEventIDs(),
HasState: true,
StateEventIDs: stateIDs,
})
if err := api.SendInputRoomEvents(context.Background(), rsAPI, inputEvents); err != nil {
t.Fatalf("SendInputRoomEvents returned error for rewrite events: %s", err)
}
// we should just have one output event with the entire state of the room in it
if len(producer.producedMessages) != 1 {
t.Fatalf("Rewritten events got output, want only 1 got %d", len(producer.producedMessages))
}
outputEvent := producer.producedMessages[0]
if !outputEvent.NewRoomEvent.RewritesState {
t.Errorf("RewritesState flag not set on output event")
}
if !reflect.DeepEqual(stateIDs, outputEvent.NewRoomEvent.AddsStateEventIDs) {
t.Errorf("Output event is missing room state event IDs, got %v want %v", outputEvent.NewRoomEvent.AddsStateEventIDs, stateIDs)
}
if !bytes.Equal(outputEvent.NewRoomEvent.Event.JSON(), lastEv.JSON()) {
t.Errorf(
"Output event isn't the latest KindNew event:\ngot %s\nwant %s",
string(outputEvent.NewRoomEvent.Event.JSON()),
string(lastEv.JSON()),
)
}
if len(outputEvent.NewRoomEvent.AddStateEvents) != len(stateIDs) {
t.Errorf("Output event is missing room state events themselves, got %d want %d", len(outputEvent.NewRoomEvent.AddStateEvents), len(stateIDs))
}
// make sure the state got overwritten, check the room name
hasRoomName := false
for _, ev := range outputEvent.NewRoomEvent.AddStateEvents {
if ev.Type() == "m.room.name" {
hasRoomName = string(ev.Content()) == `{"name":"Room Name 2"}`
}
}
if !hasRoomName {
t.Errorf("Output event did not overwrite room state")
}
}

21
roomserver/types/types.go
View file

@ -16,6 +16,8 @@
package types
import (
"sort"
"github.com/matrix-org/gomatrixserverlib"
)
@ -72,6 +74,25 @@ func (a StateEntry) LessThan(b StateEntry) bool {
return a.EventNID < b.EventNID
}
// Deduplicate takes a set of state entries and ensures that there are no
// duplicate (event type, state key) tuples. If there are then we dedupe
// them, making sure that the latest/highest NIDs are always chosen.
func DeduplicateStateEntries(a []StateEntry) []StateEntry {
if len(a) < 2 {
return a
}
sort.SliceStable(a, func(i, j int) bool {
return a[i].LessThan(a[j])
})
for i := 0; i < len(a)-1; i++ {
if a[i].StateKeyTuple == a[i+1].StateKeyTuple {
a = append(a[:i], a[i+1:]...)
i--
}
}
return a
}
// StateAtEvent is the state before and after a matrix event.
type StateAtEvent struct {
// Should this state overwrite the latest events and memberships of the room?

26
roomserver/types/types_test.go Normal file
View file

@ -0,0 +1,26 @@
package types
import (
"testing"
)
func TestDeduplicateStateEntries(t *testing.T) {
entries := []StateEntry{
{StateKeyTuple{1, 1}, 1},
{StateKeyTuple{1, 1}, 2},
{StateKeyTuple{1, 1}, 3},
{StateKeyTuple{2, 2}, 4},
{StateKeyTuple{2, 3}, 5},
{StateKeyTuple{3, 3}, 6},
}
expected := []EventNID{3, 4, 5, 6}
entries = DeduplicateStateEntries(entries)
if len(entries) != 4 {
t.Fatalf("Expected 4 entries, got %d entries", len(entries))
}
for i, v := range entries {
if v.EventNID != expected[i] {
t.Fatalf("Expected position %d to be %d but got %d", i, expected[i], v.EventNID)
}
}
}

6
syncapi/consumers/roomserver.go
View file

@ -149,6 +149,12 @@ func (s *OutputRoomEventConsumer) onNewRoomEvent(
}
}
if msg.RewritesState {
if err = s.db.PurgeRoom(ctx, ev.RoomID()); err != nil {
return fmt.Errorf("s.db.PurgeRoom: %w", err)
}
}
pduPos, err := s.db.WriteEvent(
ctx,
&ev,

3
syncapi/storage/interface.go
View file

@ -43,6 +43,9 @@ type Database interface {
// Returns an error if there was a problem inserting this event.
WriteEvent(ctx context.Context, ev *gomatrixserverlib.HeaderedEvent, addStateEvents []gomatrixserverlib.HeaderedEvent,
addStateEventIDs []string, removeStateEventIDs []string, transactionID *api.TransactionID, excludeFromSync bool) (types.StreamPosition, error)
// PurgeRoom completely purges room state from the sync API. This is done when
// receiving an output event that completely resets the state.
PurgeRoom(ctx context.Context, roomID string) error
// GetStateEvent returns the Matrix state event of a given type for a given room with a given state key
// If no event could be found, returns nil
// If there was an issue during the retrieval, returns an error

15
syncapi/storage/postgres/backwards_extremities_table.go
View file

@ -19,6 +19,7 @@ import (
"database/sql"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
)
@ -46,10 +47,14 @@ const selectBackwardExtremitiesForRoomSQL = "" +
const deleteBackwardExtremitySQL = "" +
"DELETE FROM syncapi_backward_extremities WHERE room_id = $1 AND prev_event_id = $2"
const deleteBackwardExtremitiesForRoomSQL = "" +
"DELETE FROM syncapi_backward_extremities WHERE room_id = $1"
type backwardExtremitiesStatements struct {
insertBackwardExtremityStmt *sql.Stmt
selectBackwardExtremitiesForRoomStmt *sql.Stmt
deleteBackwardExtremityStmt *sql.Stmt
deleteBackwardExtremitiesForRoomStmt *sql.Stmt
}
func NewPostgresBackwardsExtremitiesTable(db *sql.DB) (tables.BackwardsExtremities, error) {
@ -67,6 +72,9 @@ func NewPostgresBackwardsExtremitiesTable(db *sql.DB) (tables.BackwardsExtremiti
if s.deleteBackwardExtremityStmt, err = db.Prepare(deleteBackwardExtremitySQL); err != nil {
return nil, err
}
if s.deleteBackwardExtremitiesForRoomStmt, err = db.Prepare(deleteBackwardExtremitiesForRoomSQL); err != nil {
return nil, err
}
return s, nil
}
@ -105,3 +113,10 @@ func (s *backwardExtremitiesStatements) DeleteBackwardExtremity(
_, err = txn.Stmt(s.deleteBackwardExtremityStmt).ExecContext(ctx, roomID, knownEventID)
return
}
func (s *backwardExtremitiesStatements) DeleteBackwardExtremitiesForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteBackwardExtremitiesForRoomStmt).ExecContext(ctx, roomID)
return err
}

15
syncapi/storage/postgres/current_room_state_table.go
View file

@ -69,6 +69,9 @@ const upsertRoomStateSQL = "" +
const deleteRoomStateByEventIDSQL = "" +
"DELETE FROM syncapi_current_room_state WHERE event_id = $1"
const DeleteRoomStateForRoomSQL = "" +
"DELETE FROM syncapi_current_room_state WHERE event_id = $1"
const selectRoomIDsWithMembershipSQL = "" +
"SELECT DISTINCT room_id FROM syncapi_current_room_state WHERE type = 'm.room.member' AND state_key = $1 AND membership = $2"
@ -98,6 +101,7 @@ const selectEventsWithEventIDsSQL = "" +
type currentRoomStateStatements struct {
upsertRoomStateStmt *sql.Stmt
deleteRoomStateByEventIDStmt *sql.Stmt
DeleteRoomStateForRoomStmt *sql.Stmt
selectRoomIDsWithMembershipStmt *sql.Stmt
selectCurrentStateStmt *sql.Stmt
selectJoinedUsersStmt *sql.Stmt
@ -117,6 +121,9 @@ func NewPostgresCurrentRoomStateTable(db *sql.DB) (tables.CurrentRoomState, erro
if s.deleteRoomStateByEventIDStmt, err = db.Prepare(deleteRoomStateByEventIDSQL); err != nil {
return nil, err
}
if s.DeleteRoomStateForRoomStmt, err = db.Prepare(DeleteRoomStateForRoomSQL); err != nil {
return nil, err
}
if s.selectRoomIDsWithMembershipStmt, err = db.Prepare(selectRoomIDsWithMembershipSQL); err != nil {
return nil, err
}
@ -214,6 +221,14 @@ func (s *currentRoomStateStatements) DeleteRoomStateByEventID(
return err
}
func (s *currentRoomStateStatements) DeleteRoomStateForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) error {
stmt := sqlutil.TxStmt(txn, s.DeleteRoomStateForRoomStmt)
_, err := stmt.ExecContext(ctx, roomID)
return err
}
func (s *currentRoomStateStatements) UpsertRoomState(
ctx context.Context, txn *sql.Tx,
event gomatrixserverlib.HeaderedEvent, membership *string, addedAt types.StreamPosition,

14
syncapi/storage/postgres/output_room_events_table.go
View file

@ -115,6 +115,9 @@ const selectStateInRangeSQL = "" +
" ORDER BY id ASC" +
" LIMIT $8"
const deleteEventsForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events WHERE room_id = $1"
type outputRoomEventsStatements struct {
insertEventStmt *sql.Stmt
selectEventsStmt *sql.Stmt
@ -124,6 +127,7 @@ type outputRoomEventsStatements struct {
selectEarlyEventsStmt *sql.Stmt
selectStateInRangeStmt *sql.Stmt
updateEventJSONStmt *sql.Stmt
deleteEventsForRoomStmt *sql.Stmt
}
func NewPostgresEventsTable(db *sql.DB) (tables.Events, error) {
@ -156,6 +160,9 @@ func NewPostgresEventsTable(db *sql.DB) (tables.Events, error) {
if s.updateEventJSONStmt, err = db.Prepare(updateEventJSONSQL); err != nil {
return nil, err
}
if s.deleteEventsForRoomStmt, err = db.Prepare(deleteEventsForRoomSQL); err != nil {
return nil, err
}
return s, nil
}
@ -395,6 +402,13 @@ func (s *outputRoomEventsStatements) SelectEvents(
return rowsToStreamEvents(rows)
}
func (s *outputRoomEventsStatements) DeleteEventsForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteEventsForRoomStmt).ExecContext(ctx, roomID)
return err
}
func rowsToStreamEvents(rows *sql.Rows) ([]types.StreamEvent, error) {
var result []types.StreamEvent
for rows.Next() {

15
syncapi/storage/postgres/output_room_events_topology_table.go
View file

@ -19,6 +19,7 @@ import (
"database/sql"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
@ -71,12 +72,16 @@ const selectMaxPositionInTopologySQL = "" +
"SELECT MAX(topological_position) FROM syncapi_output_room_events_topology WHERE room_id=$1" +
") ORDER BY stream_position DESC LIMIT 1"
const deleteTopologyForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events_topology WHERE room_id = $1"
type outputRoomEventsTopologyStatements struct {
insertEventInTopologyStmt *sql.Stmt
selectEventIDsInRangeASCStmt *sql.Stmt
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
deleteTopologyForRoomStmt *sql.Stmt
}
func NewPostgresTopologyTable(db *sql.DB) (tables.Topology, error) {
@ -100,6 +105,9 @@ func NewPostgresTopologyTable(db *sql.DB) (tables.Topology, error) {
if s.selectMaxPositionInTopologyStmt, err = db.Prepare(selectMaxPositionInTopologySQL); err != nil {
return nil, err
}
if s.deleteTopologyForRoomStmt, err = db.Prepare(deleteTopologyForRoomSQL); err != nil {
return nil, err
}
return s, nil
}
@ -167,3 +175,10 @@ func (s *outputRoomEventsTopologyStatements) SelectMaxPositionInTopology(
err = s.selectMaxPositionInTopologyStmt.QueryRowContext(ctx, roomID).Scan(&pos, &spos)
return
}
func (s *outputRoomEventsTopologyStatements) DeleteTopologyForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteTopologyForRoomStmt).ExecContext(ctx, roomID)
return err
}

23
syncapi/storage/shared/syncserver.go
View file

@ -276,6 +276,29 @@ func (d *Database) handleBackwardExtremities(ctx context.Context, txn *sql.Tx, e
return nil
}
func (d *Database) PurgeRoom(
ctx context.Context, roomID string,
) error {
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
// If the event is a create event then we'll delete all of the existing
// data for the room. The only reason that a create event would be replayed
// to us in this way is if we're about to receive the entire room state.
if err := d.CurrentRoomState.DeleteRoomStateForRoom(ctx, txn, roomID); err != nil {
return fmt.Errorf("d.CurrentRoomState.DeleteRoomStateForRoom: %w", err)
}
if err := d.OutputEvents.DeleteEventsForRoom(ctx, txn, roomID); err != nil {
return fmt.Errorf("d.Events.DeleteEventsForRoom: %w", err)
}
if err := d.Topology.DeleteTopologyForRoom(ctx, txn, roomID); err != nil {
return fmt.Errorf("d.Topology.DeleteTopologyForRoom: %w", err)
}
if err := d.BackwardExtremities.DeleteBackwardExtremitiesForRoom(ctx, txn, roomID); err != nil {
return fmt.Errorf("d.BackwardExtremities.DeleteBackwardExtremitiesForRoom: %w", err)
}
return nil
})
}
func (d *Database) WriteEvent(
ctx context.Context,
ev *gomatrixserverlib.HeaderedEvent,

15
syncapi/storage/sqlite3/backwards_extremities_table.go
View file

@ -19,6 +19,7 @@ import (
"database/sql"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/syncapi/storage/tables"
)
@ -46,11 +47,15 @@ const selectBackwardExtremitiesForRoomSQL = "" +
const deleteBackwardExtremitySQL = "" +
"DELETE FROM syncapi_backward_extremities WHERE room_id = $1 AND prev_event_id = $2"
const deleteBackwardExtremitiesForRoomSQL = "" +
"DELETE FROM syncapi_backward_extremities WHERE room_id = $1"
type backwardExtremitiesStatements struct {
db *sql.DB
insertBackwardExtremityStmt *sql.Stmt
selectBackwardExtremitiesForRoomStmt *sql.Stmt
deleteBackwardExtremityStmt *sql.Stmt
deleteBackwardExtremitiesForRoomStmt *sql.Stmt
}
func NewSqliteBackwardsExtremitiesTable(db *sql.DB) (tables.BackwardsExtremities, error) {
@ -70,6 +75,9 @@ func NewSqliteBackwardsExtremitiesTable(db *sql.DB) (tables.BackwardsExtremities
if s.deleteBackwardExtremityStmt, err = db.Prepare(deleteBackwardExtremitySQL); err != nil {
return nil, err
}
if s.deleteBackwardExtremitiesForRoomStmt, err = db.Prepare(deleteBackwardExtremitiesForRoomSQL); err != nil {
return nil, err
}
return s, nil
}
@ -108,3 +116,10 @@ func (s *backwardExtremitiesStatements) DeleteBackwardExtremity(
_, err = txn.Stmt(s.deleteBackwardExtremityStmt).ExecContext(ctx, roomID, knownEventID)
return err
}
func (s *backwardExtremitiesStatements) DeleteBackwardExtremitiesForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteBackwardExtremitiesForRoomStmt).ExecContext(ctx, roomID)
return err
}

17
syncapi/storage/sqlite3/current_room_state_table.go
View file

@ -51,12 +51,15 @@ CREATE UNIQUE INDEX IF NOT EXISTS syncapi_event_id_idx ON syncapi_current_room_s
const upsertRoomStateSQL = "" +
"INSERT INTO syncapi_current_room_state (room_id, event_id, type, sender, contains_url, state_key, headered_event_json, membership, added_at)" +
" VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)" +
" ON CONFLICT (event_id, room_id, type, sender, contains_url)" +
" ON CONFLICT (room_id, type, state_key)" +
" DO UPDATE SET event_id = $2, sender=$4, contains_url=$5, headered_event_json = $7, membership = $8, added_at = $9"
const deleteRoomStateByEventIDSQL = "" +
"DELETE FROM syncapi_current_room_state WHERE event_id = $1"
const DeleteRoomStateForRoomSQL = "" +
"DELETE FROM syncapi_current_room_state WHERE event_id = $1"
const selectRoomIDsWithMembershipSQL = "" +
"SELECT DISTINCT room_id FROM syncapi_current_room_state WHERE type = 'm.room.member' AND state_key = $1 AND membership = $2"
@ -88,6 +91,7 @@ type currentRoomStateStatements struct {
streamIDStatements *streamIDStatements
upsertRoomStateStmt *sql.Stmt
deleteRoomStateByEventIDStmt *sql.Stmt
DeleteRoomStateForRoomStmt *sql.Stmt
selectRoomIDsWithMembershipStmt *sql.Stmt
selectCurrentStateStmt *sql.Stmt
selectJoinedUsersStmt *sql.Stmt
@ -109,6 +113,9 @@ func NewSqliteCurrentRoomStateTable(db *sql.DB, streamID *streamIDStatements) (t
if s.deleteRoomStateByEventIDStmt, err = db.Prepare(deleteRoomStateByEventIDSQL); err != nil {
return nil, err
}
if s.DeleteRoomStateForRoomStmt, err = db.Prepare(DeleteRoomStateForRoomSQL); err != nil {
return nil, err
}
if s.selectRoomIDsWithMembershipStmt, err = db.Prepare(selectRoomIDsWithMembershipSQL); err != nil {
return nil, err
}
@ -203,6 +210,14 @@ func (s *currentRoomStateStatements) DeleteRoomStateByEventID(
return err
}
func (s *currentRoomStateStatements) DeleteRoomStateForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) error {
stmt := sqlutil.TxStmt(txn, s.DeleteRoomStateForRoomStmt)
_, err := stmt.ExecContext(ctx, roomID)
return err
}
func (s *currentRoomStateStatements) UpsertRoomState(
ctx context.Context, txn *sql.Tx,
event gomatrixserverlib.HeaderedEvent, membership *string, addedAt types.StreamPosition,

14
syncapi/storage/sqlite3/output_room_events_table.go
View file

@ -103,6 +103,9 @@ const selectStateInRangeSQL = "" +
" ORDER BY id ASC" +
" LIMIT $8" // limit
const deleteEventsForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events WHERE room_id = $1"
type outputRoomEventsStatements struct {
db *sql.DB
streamIDStatements *streamIDStatements
@ -114,6 +117,7 @@ type outputRoomEventsStatements struct {
selectEarlyEventsStmt *sql.Stmt
selectStateInRangeStmt *sql.Stmt
updateEventJSONStmt *sql.Stmt
deleteEventsForRoomStmt *sql.Stmt
}
func NewSqliteEventsTable(db *sql.DB, streamID *streamIDStatements) (tables.Events, error) {
@ -149,6 +153,9 @@ func NewSqliteEventsTable(db *sql.DB, streamID *streamIDStatements) (tables.Even
if s.updateEventJSONStmt, err = db.Prepare(updateEventJSONSQL); err != nil {
return nil, err
}
if s.deleteEventsForRoomStmt, err = db.Prepare(deleteEventsForRoomSQL); err != nil {
return nil, err
}
return s, nil
}
@ -410,6 +417,13 @@ func (s *outputRoomEventsStatements) SelectEvents(
return returnEvents, nil
}
func (s *outputRoomEventsStatements) DeleteEventsForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteEventsForRoomStmt).ExecContext(ctx, roomID)
return err
}
func rowsToStreamEvents(rows *sql.Rows) ([]types.StreamEvent, error) {
var result []types.StreamEvent
for rows.Next() {

14
syncapi/storage/sqlite3/output_room_events_topology_table.go
View file

@ -65,6 +65,9 @@ const selectMaxPositionInTopologySQL = "" +
"SELECT MAX(topological_position), stream_position FROM syncapi_output_room_events_topology" +
" WHERE room_id = $1 ORDER BY stream_position DESC"
const deleteTopologyForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events_topology WHERE room_id = $1"
type outputRoomEventsTopologyStatements struct {
db *sql.DB
insertEventInTopologyStmt *sql.Stmt
@ -72,6 +75,7 @@ type outputRoomEventsTopologyStatements struct {
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
deleteTopologyForRoomStmt *sql.Stmt
}
func NewSqliteTopologyTable(db *sql.DB) (tables.Topology, error) {
@ -97,6 +101,9 @@ func NewSqliteTopologyTable(db *sql.DB) (tables.Topology, error) {
if s.selectMaxPositionInTopologyStmt, err = db.Prepare(selectMaxPositionInTopologySQL); err != nil {
return nil, err
}
if s.deleteTopologyForRoomStmt, err = db.Prepare(deleteTopologyForRoomSQL); err != nil {
return nil, err
}
return s, nil
}
@ -164,3 +171,10 @@ func (s *outputRoomEventsTopologyStatements) SelectMaxPositionInTopology(
err = stmt.QueryRowContext(ctx, roomID).Scan(&pos, &spos)
return
}
func (s *outputRoomEventsTopologyStatements) DeleteTopologyForRoom(
ctx context.Context, txn *sql.Tx, roomID string,
) (err error) {
_, err = sqlutil.TxStmt(txn, s.deleteTopologyForRoomStmt).ExecContext(ctx, roomID)
return err
}

7
syncapi/storage/tables/interface.go
View file

@ -60,6 +60,8 @@ type Events interface {
SelectEarlyEvents(ctx context.Context, txn *sql.Tx, roomID string, r types.Range, limit int) ([]types.StreamEvent, error)
SelectEvents(ctx context.Context, txn *sql.Tx, eventIDs []string) ([]types.StreamEvent, error)
UpdateEventJSON(ctx context.Context, event *gomatrixserverlib.HeaderedEvent) error
// DeleteEventsForRoom removes all event information for a room. This should only be done when removing the room entirely.
DeleteEventsForRoom(ctx context.Context, txn *sql.Tx, roomID string) (err error)
}
// Topology keeps track of the depths and stream positions for all events.
@ -77,6 +79,8 @@ type Topology interface {
SelectPositionInTopology(ctx context.Context, txn *sql.Tx, eventID string) (depth, spos types.StreamPosition, err error)
// SelectMaxPositionInTopology returns the event which has the highest depth, and if there are multiple, the event with the highest stream position.
SelectMaxPositionInTopology(ctx context.Context, txn *sql.Tx, roomID string) (depth types.StreamPosition, spos types.StreamPosition, err error)
// DeleteTopologyForRoom removes all topological information for a room. This should only be done when removing the room entirely.
DeleteTopologyForRoom(ctx context.Context, txn *sql.Tx, roomID string) (err error)
}
type CurrentRoomState interface {
@ -84,6 +88,7 @@ type CurrentRoomState interface {
SelectEventsWithEventIDs(ctx context.Context, txn *sql.Tx, eventIDs []string) ([]types.StreamEvent, error)
UpsertRoomState(ctx context.Context, txn *sql.Tx, event gomatrixserverlib.HeaderedEvent, membership *string, addedAt types.StreamPosition) error
DeleteRoomStateByEventID(ctx context.Context, txn *sql.Tx, eventID string) error
DeleteRoomStateForRoom(ctx context.Context, txn *sql.Tx, roomID string) error
// SelectCurrentState returns all the current state events for the given room.
SelectCurrentState(ctx context.Context, txn *sql.Tx, roomID string, stateFilter *gomatrixserverlib.StateFilter) ([]gomatrixserverlib.HeaderedEvent, error)
// SelectRoomIDsWithMembership returns the list of room IDs which have the given user in the given membership state.
@ -118,6 +123,8 @@ type BackwardsExtremities interface {
SelectBackwardExtremitiesForRoom(ctx context.Context, roomID string) (bwExtrems map[string][]string, err error)
// DeleteBackwardExtremity removes a backwards extremity for a room, if one existed.
DeleteBackwardExtremity(ctx context.Context, txn *sql.Tx, roomID, knownEventID string) (err error)
// DeleteBackwardExtremitiesFoorRoomID removes all backward extremities for a room. This should only be done when removing the room entirely.
DeleteBackwardExtremitiesForRoom(ctx context.Context, txn *sql.Tx, roomID string) (err error)
}
// SendToDevice tracks send-to-device messages which are sent to individual