From e473320e733484b1cc6da0588fd2ccf4affb3d24 Mon Sep 17 00:00:00 2001 From: Kegsay Date: Wed, 2 Sep 2020 13:47:31 +0100 Subject: [PATCH] Refactor roomserver/internal - split perform stuff out (#1380) - New package `perform` which contains all `Perform` functions - New package `helpers` which contains helper functions used by both perform and query/input functions. - Perform invite/leave have no idea how to `WriteOutputEvents` and this is now returned from `PerformInvite` or `PerformLeave` respectively. Still to do: - RSAPI is fed into the inviter/joiner/leaver - this introduces circular logic so will need to be removed. - Put query operations in a `query` package. - Put input operations (and output) in an `input` package. - Factor out helper functions as much as possible, possibly rejigging the storage layer in the process. --- build/scripts/complement.sh | 2 +- roomserver/internal/api.go | 120 ++++- .../{input_authevents.go => helpers/auth.go} | 16 +- .../auth_test.go} | 6 +- roomserver/internal/helpers/helpers.go | 326 ++++++++++++ roomserver/internal/input.go | 9 - roomserver/internal/input_events.go | 3 +- roomserver/internal/input_membership.go | 37 +- .../{ => perform}/perform_backfill.go | 237 ++++++++- .../internal/{ => perform}/perform_invite.go | 59 ++- .../internal/{ => perform}/perform_join.go | 37 +- .../internal/{ => perform}/perform_leave.go | 126 ++--- .../internal/{ => perform}/perform_publish.go | 9 +- roomserver/internal/query.go | 466 +----------------- roomserver/roomserver.go | 14 +- 15 files changed, 820 insertions(+), 647 deletions(-) rename roomserver/internal/{input_authevents.go => helpers/auth.go} (96%) rename roomserver/internal/{input_authevents_test.go => helpers/auth_test.go} (97%) create mode 100644 roomserver/internal/helpers/helpers.go rename roomserver/internal/{ => perform}/perform_backfill.go (55%) rename roomserver/internal/{ => perform}/perform_invite.go (83%) rename roomserver/internal/{ => perform}/perform_join.go (89%) rename roomserver/internal/{ => perform}/perform_leave.go (53%) rename roomserver/internal/{ => perform}/perform_publish.go (67%) diff --git a/build/scripts/complement.sh b/build/scripts/complement.sh index 17ddea57..c1e52dde 100755 --- a/build/scripts/complement.sh +++ b/build/scripts/complement.sh @@ -15,5 +15,5 @@ tar -xzf master.tar.gz # Run the tests! cd complement-master -COMPLEMENT_BASE_IMAGE=complement-dendrite:latest go test -v ./tests +COMPLEMENT_BASE_IMAGE=complement-dendrite:latest go test -v -count=1 ./tests diff --git a/roomserver/internal/api.go b/roomserver/internal/api.go index f94c72f0..1897f7a5 100644 --- a/roomserver/internal/api.go +++ b/roomserver/internal/api.go @@ -1,12 +1,15 @@ package internal import ( + "context" "sync" "github.com/Shopify/sarama" fsAPI "github.com/matrix-org/dendrite/federationsender/api" "github.com/matrix-org/dendrite/internal/caching" "github.com/matrix-org/dendrite/internal/config" + "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/internal/perform" "github.com/matrix-org/dendrite/roomserver/storage" "github.com/matrix-org/gomatrixserverlib" ) @@ -20,7 +23,122 @@ type RoomserverInternalAPI struct { ServerName gomatrixserverlib.ServerName KeyRing gomatrixserverlib.JSONVerifier FedClient *gomatrixserverlib.FederationClient - OutputRoomEventTopic string // Kafka topic for new output room events + OutputRoomEventTopic string // Kafka topic for new output room events + Inviter *perform.Inviter + Joiner *perform.Joiner + Leaver *perform.Leaver + Publisher *perform.Publisher + Backfiller *perform.Backfiller mutexes sync.Map // room ID -> *sync.Mutex, protects calls to processRoomEvent fsAPI fsAPI.FederationSenderInternalAPI } + +func NewRoomserverAPI( + cfg *config.RoomServer, roomserverDB storage.Database, producer sarama.SyncProducer, + outputRoomEventTopic string, caches caching.RoomServerCaches, fedClient *gomatrixserverlib.FederationClient, + keyRing gomatrixserverlib.JSONVerifier, +) *RoomserverInternalAPI { + a := &RoomserverInternalAPI{ + DB: roomserverDB, + Cfg: cfg, + Producer: producer, + Cache: caches, + ServerName: cfg.Matrix.ServerName, + KeyRing: keyRing, + FedClient: fedClient, + OutputRoomEventTopic: outputRoomEventTopic, + // perform-er structs get initialised when we have a federation sender to use + } + return a +} + +// SetFederationSenderInputAPI passes in a federation sender input API reference +// so that we can avoid the chicken-and-egg problem of both the roomserver input API +// and the federation sender input API being interdependent. +func (r *RoomserverInternalAPI) SetFederationSenderAPI(fsAPI fsAPI.FederationSenderInternalAPI) { + r.fsAPI = fsAPI + + r.Inviter = &perform.Inviter{ + DB: r.DB, + Cfg: r.Cfg, + FSAPI: r.fsAPI, + RSAPI: r, + } + r.Joiner = &perform.Joiner{ + ServerName: r.Cfg.Matrix.ServerName, + Cfg: r.Cfg, + DB: r.DB, + FSAPI: r.fsAPI, + RSAPI: r, + } + r.Leaver = &perform.Leaver{ + Cfg: r.Cfg, + DB: r.DB, + FSAPI: r.fsAPI, + RSAPI: r, + } + r.Publisher = &perform.Publisher{ + DB: r.DB, + } + r.Backfiller = &perform.Backfiller{ + ServerName: r.ServerName, + DB: r.DB, + FedClient: r.FedClient, + KeyRing: r.KeyRing, + } +} + +func (r *RoomserverInternalAPI) PerformInvite( + ctx context.Context, + req *api.PerformInviteRequest, + res *api.PerformInviteResponse, +) error { + outputEvents, err := r.Inviter.PerformInvite(ctx, req, res) + if err != nil { + return err + } + if len(outputEvents) == 0 { + return nil + } + return r.WriteOutputEvents(req.Event.RoomID(), outputEvents) +} + +func (r *RoomserverInternalAPI) PerformJoin( + ctx context.Context, + req *api.PerformJoinRequest, + res *api.PerformJoinResponse, +) { + r.Joiner.PerformJoin(ctx, req, res) +} + +func (r *RoomserverInternalAPI) PerformLeave( + ctx context.Context, + req *api.PerformLeaveRequest, + res *api.PerformLeaveResponse, +) error { + outputEvents, err := r.Leaver.PerformLeave(ctx, req, res) + if err != nil { + return err + } + if len(outputEvents) == 0 { + return nil + } + return r.WriteOutputEvents(req.RoomID, outputEvents) +} + +func (r *RoomserverInternalAPI) PerformPublish( + ctx context.Context, + req *api.PerformPublishRequest, + res *api.PerformPublishResponse, +) { + r.Publisher.PerformPublish(ctx, req, res) +} + +// Query a given amount (or less) of events prior to a given set of events. +func (r *RoomserverInternalAPI) PerformBackfill( + ctx context.Context, + request *api.PerformBackfillRequest, + response *api.PerformBackfillResponse, +) error { + return r.Backfiller.PerformBackfill(ctx, request, response) +} diff --git a/roomserver/internal/input_authevents.go b/roomserver/internal/helpers/auth.go similarity index 96% rename from roomserver/internal/input_authevents.go rename to roomserver/internal/helpers/auth.go index e3828f56..060f0a0e 100644 --- a/roomserver/internal/input_authevents.go +++ b/roomserver/internal/helpers/auth.go @@ -12,7 +12,7 @@ // See the License for the specific language governing permissions and // limitations under the License. -package internal +package helpers import ( "context" @@ -23,9 +23,9 @@ import ( "github.com/matrix-org/gomatrixserverlib" ) -// checkAuthEvents checks that the event passes authentication checks +// CheckAuthEvents checks that the event passes authentication checks // Returns the numeric IDs for the auth events. -func checkAuthEvents( +func CheckAuthEvents( ctx context.Context, db storage.Database, event gomatrixserverlib.HeaderedEvent, @@ -63,7 +63,7 @@ func checkAuthEvents( type authEvents struct { stateKeyNIDMap map[string]types.EventStateKeyNID state stateEntryMap - events eventMap + events EventMap } // Create implements gomatrixserverlib.AuthEventProvider @@ -99,7 +99,7 @@ func (ae *authEvents) lookupEventWithEmptyStateKey(typeNID types.EventTypeNID) * if !ok { return nil } - event, ok := ae.events.lookup(eventNID) + event, ok := ae.events.Lookup(eventNID) if !ok { return nil } @@ -118,7 +118,7 @@ func (ae *authEvents) lookupEvent(typeNID types.EventTypeNID, stateKey string) * if !ok { return nil } - event, ok := ae.events.lookup(eventNID) + event, ok := ae.events.Lookup(eventNID) if !ok { return nil } @@ -224,10 +224,10 @@ func (m stateEntryMap) lookup(stateKey types.StateKeyTuple) (eventNID types.Even // Map from numeric event ID to event. // Implemented using binary search on a sorted array. -type eventMap []types.Event +type EventMap []types.Event // lookup an entry in the event map. -func (m eventMap) lookup(eventNID types.EventNID) (event *types.Event, ok bool) { +func (m EventMap) Lookup(eventNID types.EventNID) (event *types.Event, ok bool) { // Since the list is sorted we can implement this using binary search. // This is faster than using a hash map. // We don't have to worry about pathological cases because the keys are fixed diff --git a/roomserver/internal/input_authevents_test.go b/roomserver/internal/helpers/auth_test.go similarity index 97% rename from roomserver/internal/input_authevents_test.go rename to roomserver/internal/helpers/auth_test.go index 6b981571..2a1c3ea4 100644 --- a/roomserver/internal/input_authevents_test.go +++ b/roomserver/internal/helpers/auth_test.go @@ -12,7 +12,7 @@ // See the License for the specific language governing permissions and // limitations under the License. -package internal +package helpers import ( "testing" @@ -95,7 +95,7 @@ func TestStateEntryMap(t *testing.T) { } func TestEventMap(t *testing.T) { - events := eventMap([]types.Event{ + events := EventMap([]types.Event{ {EventNID: 1}, {EventNID: 2}, {EventNID: 3}, @@ -123,7 +123,7 @@ func TestEventMap(t *testing.T) { } for _, testCase := range testCases { - gotEvent, gotOK := events.lookup(testCase.inputEventNID) + gotEvent, gotOK := events.Lookup(testCase.inputEventNID) if testCase.wantOK != gotOK { t.Fatalf("eventMap lookup(%v): want ok to be %v, got %v", testCase.inputEventNID, testCase.wantOK, gotOK) } diff --git a/roomserver/internal/helpers/helpers.go b/roomserver/internal/helpers/helpers.go new file mode 100644 index 00000000..d7bb40af --- /dev/null +++ b/roomserver/internal/helpers/helpers.go @@ -0,0 +1,326 @@ +package helpers + +import ( + "context" + "fmt" + + "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/auth" + "github.com/matrix-org/dendrite/roomserver/state" + "github.com/matrix-org/dendrite/roomserver/storage" + "github.com/matrix-org/dendrite/roomserver/storage/shared" + "github.com/matrix-org/dendrite/roomserver/types" + "github.com/matrix-org/gomatrixserverlib" + "github.com/matrix-org/util" +) + +// TODO: temporary package which has helper functions used by both internal/perform packages. +// Move these to a more sensible place. + +func UpdateToInviteMembership( + mu *shared.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent, + roomVersion gomatrixserverlib.RoomVersion, +) ([]api.OutputEvent, error) { + // We may have already sent the invite to the user, either because we are + // reprocessing this event, or because the we received this invite from a + // remote server via the federation invite API. In those cases we don't need + // to send the event. + needsSending, err := mu.SetToInvite(*add) + if err != nil { + return nil, err + } + if needsSending { + // We notify the consumers using a special event even though we will + // notify them about the change in current state as part of the normal + // room event stream. This ensures that the consumers only have to + // consider a single stream of events when determining whether a user + // is invited, rather than having to combine multiple streams themselves. + onie := api.OutputNewInviteEvent{ + Event: add.Headered(roomVersion), + RoomVersion: roomVersion, + } + updates = append(updates, api.OutputEvent{ + Type: api.OutputTypeNewInviteEvent, + NewInviteEvent: &onie, + }) + } + return updates, nil +} + +func IsServerCurrentlyInRoom(ctx context.Context, db storage.Database, serverName gomatrixserverlib.ServerName, roomID string) (bool, error) { + info, err := db.RoomInfo(ctx, roomID) + if err != nil { + return false, err + } + if info == nil { + return false, fmt.Errorf("unknown room %s", roomID) + } + + eventNIDs, err := db.GetMembershipEventNIDsForRoom(ctx, info.RoomNID, true, false) + if err != nil { + return false, err + } + + events, err := db.Events(ctx, eventNIDs) + if err != nil { + return false, err + } + gmslEvents := make([]gomatrixserverlib.Event, len(events)) + for i := range events { + gmslEvents[i] = events[i].Event + } + return auth.IsAnyUserOnServerWithMembership(serverName, gmslEvents, gomatrixserverlib.Join), nil +} + +func IsInvitePending( + ctx context.Context, db storage.Database, + roomID, userID string, +) (bool, string, string, error) { + // Look up the room NID for the supplied room ID. + info, err := db.RoomInfo(ctx, roomID) + if err != nil { + return false, "", "", fmt.Errorf("r.DB.RoomInfo: %w", err) + } + if info == nil { + return false, "", "", fmt.Errorf("cannot get RoomInfo: unknown room ID %s", roomID) + } + + // Look up the state key NID for the supplied user ID. + targetUserNIDs, err := db.EventStateKeyNIDs(ctx, []string{userID}) + if err != nil { + return false, "", "", fmt.Errorf("r.DB.EventStateKeyNIDs: %w", err) + } + targetUserNID, targetUserFound := targetUserNIDs[userID] + if !targetUserFound { + return false, "", "", fmt.Errorf("missing NID for user %q (%+v)", userID, targetUserNIDs) + } + + // Let's see if we have an event active for the user in the room. If + // we do then it will contain a server name that we can direct the + // send_leave to. + senderUserNIDs, eventIDs, err := db.GetInvitesForUser(ctx, info.RoomNID, targetUserNID) + if err != nil { + return false, "", "", fmt.Errorf("r.DB.GetInvitesForUser: %w", err) + } + if len(senderUserNIDs) == 0 { + return false, "", "", nil + } + userNIDToEventID := make(map[types.EventStateKeyNID]string) + for i, nid := range senderUserNIDs { + userNIDToEventID[nid] = eventIDs[i] + } + + // Look up the user ID from the NID. + senderUsers, err := db.EventStateKeys(ctx, senderUserNIDs) + if err != nil { + return false, "", "", fmt.Errorf("r.DB.EventStateKeys: %w", err) + } + if len(senderUsers) == 0 { + return false, "", "", fmt.Errorf("no senderUsers") + } + + senderUser, senderUserFound := senderUsers[senderUserNIDs[0]] + if !senderUserFound { + return false, "", "", fmt.Errorf("missing user for NID %d (%+v)", senderUserNIDs[0], senderUsers) + } + + return true, senderUser, userNIDToEventID[senderUserNIDs[0]], nil +} + +// GetMembershipsAtState filters the state events to +// only keep the "m.room.member" events with a "join" membership. These events are returned. +// Returns an error if there was an issue fetching the events. +func GetMembershipsAtState( + ctx context.Context, db storage.Database, stateEntries []types.StateEntry, joinedOnly bool, +) ([]types.Event, error) { + + var eventNIDs []types.EventNID + for _, entry := range stateEntries { + // Filter the events to retrieve to only keep the membership events + if entry.EventTypeNID == types.MRoomMemberNID { + eventNIDs = append(eventNIDs, entry.EventNID) + } + } + + // Get all of the events in this state + stateEvents, err := db.Events(ctx, eventNIDs) + if err != nil { + return nil, err + } + + if !joinedOnly { + return stateEvents, nil + } + + // Filter the events to only keep the "join" membership events + var events []types.Event + for _, event := range stateEvents { + membership, err := event.Membership() + if err != nil { + return nil, err + } + + if membership == gomatrixserverlib.Join { + events = append(events, event) + } + } + + return events, nil +} + +func StateBeforeEvent(ctx context.Context, db storage.Database, info types.RoomInfo, eventNID types.EventNID) ([]types.StateEntry, error) { + roomState := state.NewStateResolution(db, info) + // Lookup the event NID + eIDs, err := db.EventIDs(ctx, []types.EventNID{eventNID}) + if err != nil { + return nil, err + } + eventIDs := []string{eIDs[eventNID]} + + prevState, err := db.StateAtEventIDs(ctx, eventIDs) + if err != nil { + return nil, err + } + + // Fetch the state as it was when this event was fired + return roomState.LoadCombinedStateAfterEvents(ctx, prevState) +} + +func LoadEvents( + ctx context.Context, db storage.Database, eventNIDs []types.EventNID, +) ([]gomatrixserverlib.Event, error) { + stateEvents, err := db.Events(ctx, eventNIDs) + if err != nil { + return nil, err + } + + result := make([]gomatrixserverlib.Event, len(stateEvents)) + for i := range stateEvents { + result[i] = stateEvents[i].Event + } + return result, nil +} + +func LoadStateEvents( + ctx context.Context, db storage.Database, stateEntries []types.StateEntry, +) ([]gomatrixserverlib.Event, error) { + eventNIDs := make([]types.EventNID, len(stateEntries)) + for i := range stateEntries { + eventNIDs[i] = stateEntries[i].EventNID + } + return LoadEvents(ctx, db, eventNIDs) +} + +func CheckServerAllowedToSeeEvent( + ctx context.Context, db storage.Database, info types.RoomInfo, eventID string, serverName gomatrixserverlib.ServerName, isServerInRoom bool, +) (bool, error) { + roomState := state.NewStateResolution(db, info) + stateEntries, err := roomState.LoadStateAtEvent(ctx, eventID) + if err != nil { + return false, err + } + + // TODO: We probably want to make it so that we don't have to pull + // out all the state if possible. + stateAtEvent, err := LoadStateEvents(ctx, db, stateEntries) + if err != nil { + return false, err + } + + return auth.IsServerAllowed(serverName, isServerInRoom, stateAtEvent), nil +} + +// TODO: Remove this when we have tests to assert correctness of this function +// nolint:gocyclo +func ScanEventTree( + ctx context.Context, db storage.Database, info types.RoomInfo, front []string, visited map[string]bool, limit int, + serverName gomatrixserverlib.ServerName, +) ([]types.EventNID, error) { + var resultNIDs []types.EventNID + var err error + var allowed bool + var events []types.Event + var next []string + var pre string + + // TODO: add tests for this function to ensure it meets the contract that callers expect (and doc what that is supposed to be) + // Currently, callers like PerformBackfill will call scanEventTree with a pre-populated `visited` map, assuming that by doing + // so means that the events in that map will NOT be returned from this function. That is not currently true, resulting in + // duplicate events being sent in response to /backfill requests. + initialIgnoreList := make(map[string]bool, len(visited)) + for k, v := range visited { + initialIgnoreList[k] = v + } + + resultNIDs = make([]types.EventNID, 0, limit) + + var checkedServerInRoom bool + var isServerInRoom bool + + // Loop through the event IDs to retrieve the requested events and go + // through the whole tree (up to the provided limit) using the events' + // "prev_event" key. +BFSLoop: + for len(front) > 0 { + // Prevent unnecessary allocations: reset the slice only when not empty. + if len(next) > 0 { + next = make([]string, 0) + } + // Retrieve the events to process from the database. + events, err = db.EventsFromIDs(ctx, front) + if err != nil { + return resultNIDs, err + } + + if !checkedServerInRoom && len(events) > 0 { + // It's nasty that we have to extract the room ID from an event, but many federation requests + // only talk in event IDs, no room IDs at all (!!!) + ev := events[0] + isServerInRoom, err = IsServerCurrentlyInRoom(ctx, db, serverName, ev.RoomID()) + if err != nil { + util.GetLogger(ctx).WithError(err).Error("Failed to check if server is currently in room, assuming not.") + } + checkedServerInRoom = true + } + + for _, ev := range events { + // Break out of the loop if the provided limit is reached. + if len(resultNIDs) == limit { + break BFSLoop + } + + if !initialIgnoreList[ev.EventID()] { + // Update the list of events to retrieve. + resultNIDs = append(resultNIDs, ev.EventNID) + } + // Loop through the event's parents. + for _, pre = range ev.PrevEventIDs() { + // Only add an event to the list of next events to process if it + // hasn't been seen before. + if !visited[pre] { + visited[pre] = true + allowed, err = CheckServerAllowedToSeeEvent(ctx, db, info, pre, serverName, isServerInRoom) + if err != nil { + util.GetLogger(ctx).WithField("server", serverName).WithField("event_id", pre).WithError(err).Error( + "Error checking if allowed to see event", + ) + return resultNIDs, err + } + + // If the event hasn't been seen before and the HS + // requesting to retrieve it is allowed to do so, add it to + // the list of events to retrieve. + if allowed { + next = append(next, pre) + } else { + util.GetLogger(ctx).WithField("server", serverName).WithField("event_id", pre).Info("Not allowed to see event") + } + } + } + } + // Repeat the same process with the parent events we just processed. + front = next + } + + return resultNIDs, err +} diff --git a/roomserver/internal/input.go b/roomserver/internal/input.go index e85e9830..dbf67b79 100644 --- a/roomserver/internal/input.go +++ b/roomserver/internal/input.go @@ -23,17 +23,8 @@ import ( "github.com/Shopify/sarama" "github.com/matrix-org/dendrite/roomserver/api" log "github.com/sirupsen/logrus" - - fsAPI "github.com/matrix-org/dendrite/federationsender/api" ) -// SetFederationSenderInputAPI passes in a federation sender input API reference -// so that we can avoid the chicken-and-egg problem of both the roomserver input API -// and the federation sender input API being interdependent. -func (r *RoomserverInternalAPI) SetFederationSenderAPI(fsAPI fsAPI.FederationSenderInternalAPI) { - r.fsAPI = fsAPI -} - // WriteOutputEvents implements OutputRoomEventWriter func (r *RoomserverInternalAPI) WriteOutputEvents(roomID string, updates []api.OutputEvent) error { messages := make([]*sarama.ProducerMessage, len(updates)) diff --git a/roomserver/internal/input_events.go b/roomserver/internal/input_events.go index 287db1af..edc8b416 100644 --- a/roomserver/internal/input_events.go +++ b/roomserver/internal/input_events.go @@ -22,6 +22,7 @@ import ( "github.com/matrix-org/dendrite/internal/eventutil" "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" "github.com/matrix-org/dendrite/roomserver/state" "github.com/matrix-org/dendrite/roomserver/types" "github.com/matrix-org/gomatrixserverlib" @@ -45,7 +46,7 @@ func (r *RoomserverInternalAPI) processRoomEvent( // Check that the event passes authentication checks and work out // the numeric IDs for the auth events. - authEventNIDs, err := checkAuthEvents(ctx, r.DB, headered, input.AuthEventIDs) + authEventNIDs, err := helpers.CheckAuthEvents(ctx, r.DB, headered, input.AuthEventIDs) if err != nil { logrus.WithError(err).WithField("event_id", event.EventID()).WithField("auth_event_ids", input.AuthEventIDs).Error("processRoomEvent.checkAuthEvents failed for event") return diff --git a/roomserver/internal/input_membership.go b/roomserver/internal/input_membership.go index bcecfca0..57a94596 100644 --- a/roomserver/internal/input_membership.go +++ b/roomserver/internal/input_membership.go @@ -19,6 +19,7 @@ import ( "fmt" "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" "github.com/matrix-org/dendrite/roomserver/storage/shared" "github.com/matrix-org/dendrite/roomserver/types" "github.com/matrix-org/gomatrixserverlib" @@ -59,13 +60,13 @@ func (r *RoomserverInternalAPI) updateMemberships( var re *gomatrixserverlib.Event targetUserNID := change.EventStateKeyNID if change.removedEventNID != 0 { - ev, _ := eventMap(events).lookup(change.removedEventNID) + ev, _ := helpers.EventMap(events).Lookup(change.removedEventNID) if ev != nil { re = &ev.Event } } if change.addedEventNID != 0 { - ev, _ := eventMap(events).lookup(change.addedEventNID) + ev, _ := helpers.EventMap(events).Lookup(change.addedEventNID) if ev != nil { ae = &ev.Event } @@ -120,7 +121,7 @@ func (r *RoomserverInternalAPI) updateMembership( switch newMembership { case gomatrixserverlib.Invite: - return updateToInviteMembership(mu, add, updates, updater.RoomVersion()) + return helpers.UpdateToInviteMembership(mu, add, updates, updater.RoomVersion()) case gomatrixserverlib.Join: return updateToJoinMembership(mu, add, updates) case gomatrixserverlib.Leave, gomatrixserverlib.Ban: @@ -141,36 +142,6 @@ func (r *RoomserverInternalAPI) isLocalTarget(event *gomatrixserverlib.Event) bo return isTargetLocalUser } -func updateToInviteMembership( - mu *shared.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent, - roomVersion gomatrixserverlib.RoomVersion, -) ([]api.OutputEvent, error) { - // We may have already sent the invite to the user, either because we are - // reprocessing this event, or because the we received this invite from a - // remote server via the federation invite API. In those cases we don't need - // to send the event. - needsSending, err := mu.SetToInvite(*add) - if err != nil { - return nil, err - } - if needsSending { - // We notify the consumers using a special event even though we will - // notify them about the change in current state as part of the normal - // room event stream. This ensures that the consumers only have to - // consider a single stream of events when determining whether a user - // is invited, rather than having to combine multiple streams themselves. - onie := api.OutputNewInviteEvent{ - Event: add.Headered(roomVersion), - RoomVersion: roomVersion, - } - updates = append(updates, api.OutputEvent{ - Type: api.OutputTypeNewInviteEvent, - NewInviteEvent: &onie, - }) - } - return updates, nil -} - func updateToJoinMembership( mu *shared.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent, ) ([]api.OutputEvent, error) { diff --git a/roomserver/internal/perform_backfill.go b/roomserver/internal/perform/perform_backfill.go similarity index 55% rename from roomserver/internal/perform_backfill.go rename to roomserver/internal/perform/perform_backfill.go index 721f6610..ebb66ef4 100644 --- a/roomserver/internal/perform_backfill.go +++ b/roomserver/internal/perform/perform_backfill.go @@ -1,9 +1,13 @@ -package internal +package perform import ( "context" + "fmt" + "github.com/matrix-org/dendrite/internal/eventutil" + "github.com/matrix-org/dendrite/roomserver/api" "github.com/matrix-org/dendrite/roomserver/auth" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" "github.com/matrix-org/dendrite/roomserver/storage" "github.com/matrix-org/dendrite/roomserver/types" "github.com/matrix-org/gomatrixserverlib" @@ -11,6 +15,189 @@ import ( "github.com/sirupsen/logrus" ) +type Backfiller struct { + ServerName gomatrixserverlib.ServerName + DB storage.Database + FedClient *gomatrixserverlib.FederationClient + KeyRing gomatrixserverlib.JSONVerifier +} + +// PerformBackfill implements api.RoomServerQueryAPI +func (r *Backfiller) PerformBackfill( + ctx context.Context, + request *api.PerformBackfillRequest, + response *api.PerformBackfillResponse, +) error { + // if we are requesting the backfill then we need to do a federation hit + // TODO: we could be more sensible and fetch as many events we already have then request the rest + // which is what the syncapi does already. + if request.ServerName == r.ServerName { + return r.backfillViaFederation(ctx, request, response) + } + // someone else is requesting the backfill, try to service their request. + var err error + var front []string + + // The limit defines the maximum number of events to retrieve, so it also + // defines the highest number of elements in the map below. + visited := make(map[string]bool, request.Limit) + + // this will include these events which is what we want + front = request.PrevEventIDs() + + info, err := r.DB.RoomInfo(ctx, request.RoomID) + if err != nil { + return err + } + if info == nil || info.IsStub { + return fmt.Errorf("PerformBackfill: missing room info for room %s", request.RoomID) + } + + // Scan the event tree for events to send back. + resultNIDs, err := helpers.ScanEventTree(ctx, r.DB, *info, front, visited, request.Limit, request.ServerName) + if err != nil { + return err + } + + // Retrieve events from the list that was filled previously. + var loadedEvents []gomatrixserverlib.Event + loadedEvents, err = helpers.LoadEvents(ctx, r.DB, resultNIDs) + if err != nil { + return err + } + + for _, event := range loadedEvents { + response.Events = append(response.Events, event.Headered(info.RoomVersion)) + } + + return err +} + +func (r *Backfiller) backfillViaFederation(ctx context.Context, req *api.PerformBackfillRequest, res *api.PerformBackfillResponse) error { + info, err := r.DB.RoomInfo(ctx, req.RoomID) + if err != nil { + return err + } + if info == nil || info.IsStub { + return fmt.Errorf("backfillViaFederation: missing room info for room %s", req.RoomID) + } + requester := newBackfillRequester(r.DB, r.FedClient, r.ServerName, req.BackwardsExtremities) + // Request 100 items regardless of what the query asks for. + // We don't want to go much higher than this. + // We can't honour exactly the limit as some sytests rely on requesting more for tests to pass + // (so we don't need to hit /state_ids which the test has no listener for) + // Specifically the test "Outbound federation can backfill events" + events, err := gomatrixserverlib.RequestBackfill( + ctx, requester, + r.KeyRing, req.RoomID, info.RoomVersion, req.PrevEventIDs(), 100) + if err != nil { + return err + } + logrus.WithField("room_id", req.RoomID).Infof("backfilled %d events", len(events)) + + // persist these new events - auth checks have already been done + roomNID, backfilledEventMap := persistEvents(ctx, r.DB, events) + if err != nil { + return err + } + + for _, ev := range backfilledEventMap { + // now add state for these events + stateIDs, ok := requester.eventIDToBeforeStateIDs[ev.EventID()] + if !ok { + // this should be impossible as all events returned must have pass Step 5 of the PDU checks + // which requires a list of state IDs. + logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to find state IDs for event which passed auth checks") + continue + } + var entries []types.StateEntry + if entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs); err != nil { + // attempt to fetch the missing events + r.fetchAndStoreMissingEvents(ctx, info.RoomVersion, requester, stateIDs) + // try again + entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs) + if err != nil { + logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to get state entries for event") + return err + } + } + + var beforeStateSnapshotNID types.StateSnapshotNID + if beforeStateSnapshotNID, err = r.DB.AddState(ctx, roomNID, nil, entries); err != nil { + logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to persist state entries to get snapshot nid") + return err + } + if err = r.DB.SetState(ctx, ev.EventNID, beforeStateSnapshotNID); err != nil { + logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to persist snapshot nid") + } + } + + // TODO: update backwards extremities, as that should be moved from syncapi to roomserver at some point. + + res.Events = events + return nil +} + +// fetchAndStoreMissingEvents does a best-effort fetch and store of missing events specified in stateIDs. Returns no error as it is just +// best effort. +func (r *Backfiller) fetchAndStoreMissingEvents(ctx context.Context, roomVer gomatrixserverlib.RoomVersion, + backfillRequester *backfillRequester, stateIDs []string) { + + servers := backfillRequester.servers + + // work out which are missing + nidMap, err := r.DB.EventNIDs(ctx, stateIDs) + if err != nil { + util.GetLogger(ctx).WithError(err).Warn("cannot query missing events") + return + } + missingMap := make(map[string]*gomatrixserverlib.HeaderedEvent) // id -> event + for _, id := range stateIDs { + if _, ok := nidMap[id]; !ok { + missingMap[id] = nil + } + } + util.GetLogger(ctx).Infof("Fetching %d missing state events (from %d possible servers)", len(missingMap), len(servers)) + + // fetch the events from federation. Loop the servers first so if we find one that works we stick with them + for _, srv := range servers { + for id, ev := range missingMap { + if ev != nil { + continue // already found + } + logger := util.GetLogger(ctx).WithField("server", srv).WithField("event_id", id) + res, err := r.FedClient.GetEvent(ctx, srv, id) + if err != nil { + logger.WithError(err).Warn("failed to get event from server") + continue + } + loader := gomatrixserverlib.NewEventsLoader(roomVer, r.KeyRing, backfillRequester, backfillRequester.ProvideEvents, false) + result, err := loader.LoadAndVerify(ctx, res.PDUs, gomatrixserverlib.TopologicalOrderByPrevEvents) + if err != nil { + logger.WithError(err).Warn("failed to load and verify event") + continue + } + logger.Infof("returned %d PDUs which made events %+v", len(res.PDUs), result) + for _, res := range result { + if res.Error != nil { + logger.WithError(err).Warn("event failed PDU checks") + continue + } + missingMap[id] = res.Event + } + } + } + + var newEvents []gomatrixserverlib.HeaderedEvent + for _, ev := range missingMap { + if ev != nil { + newEvents = append(newEvents, *ev) + } + } + util.GetLogger(ctx).Infof("Persisting %d new events", len(newEvents)) + persistEvents(ctx, r.DB, newEvents) +} + // backfillRequester implements gomatrixserverlib.BackfillRequester type backfillRequester struct { db storage.Database @@ -200,7 +387,7 @@ FindSuccessor: return nil } - stateEntries, err := stateBeforeEvent(ctx, b.db, *info, NIDs[eventID]) + stateEntries, err := helpers.StateBeforeEvent(ctx, b.db, *info, NIDs[eventID]) if err != nil { logrus.WithField("event_id", eventID).WithError(err).Error("ServersAtEvent: failed to load state before event") return nil @@ -217,7 +404,7 @@ FindSuccessor: // Retrieve all "m.room.member" state events of "join" membership, which // contains the list of users in the room before the event, therefore all // the servers in it at that moment. - memberEvents, err := getMembershipsAtState(ctx, b.db, stateEntries, true) + memberEvents, err := helpers.GetMembershipsAtState(ctx, b.db, stateEntries, true) if err != nil { logrus.WithField("event_id", eventID).WithError(err).Error("ServersAtEvent: failed to get memberships before event") return nil @@ -314,3 +501,47 @@ func joinEventsFromHistoryVisibility( } return db.Events(ctx, joinEventNIDs) } + +func persistEvents(ctx context.Context, db storage.Database, events []gomatrixserverlib.HeaderedEvent) (types.RoomNID, map[string]types.Event) { + var roomNID types.RoomNID + backfilledEventMap := make(map[string]types.Event) + for j, ev := range events { + nidMap, err := db.EventNIDs(ctx, ev.AuthEventIDs()) + if err != nil { // this shouldn't happen as RequestBackfill already found them + logrus.WithError(err).WithField("auth_events", ev.AuthEventIDs()).Error("Failed to find one or more auth events") + continue + } + authNids := make([]types.EventNID, len(nidMap)) + i := 0 + for _, nid := range nidMap { + authNids[i] = nid + i++ + } + var stateAtEvent types.StateAtEvent + var redactedEventID string + var redactionEvent *gomatrixserverlib.Event + roomNID, stateAtEvent, redactionEvent, redactedEventID, err = db.StoreEvent(ctx, ev.Unwrap(), nil, authNids) + if err != nil { + logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to persist event") + continue + } + // If storing this event results in it being redacted, then do so. + // It's also possible for this event to be a redaction which results in another event being + // redacted, which we don't care about since we aren't returning it in this backfill. + if redactedEventID == ev.EventID() { + eventToRedact := ev.Unwrap() + redactedEvent, err := eventutil.RedactEvent(redactionEvent, &eventToRedact) + if err != nil { + logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to redact event") + continue + } + ev = redactedEvent.Headered(ev.RoomVersion) + events[j] = ev + } + backfilledEventMap[ev.EventID()] = types.Event{ + EventNID: stateAtEvent.StateEntry.EventNID, + Event: ev.Unwrap(), + } + } + return roomNID, backfilledEventMap +} diff --git a/roomserver/internal/perform_invite.go b/roomserver/internal/perform/perform_invite.go similarity index 83% rename from roomserver/internal/perform_invite.go rename to roomserver/internal/perform/perform_invite.go index 6690de05..7320388e 100644 --- a/roomserver/internal/perform_invite.go +++ b/roomserver/internal/perform/perform_invite.go @@ -1,11 +1,13 @@ -package internal +package perform import ( "context" "fmt" federationSenderAPI "github.com/matrix-org/dendrite/federationsender/api" + "github.com/matrix-org/dendrite/internal/config" "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" "github.com/matrix-org/dendrite/roomserver/state" "github.com/matrix-org/dendrite/roomserver/storage" "github.com/matrix-org/dendrite/roomserver/types" @@ -13,22 +15,31 @@ import ( log "github.com/sirupsen/logrus" ) +type Inviter struct { + DB storage.Database + Cfg *config.RoomServer + FSAPI federationSenderAPI.FederationSenderInternalAPI + + // TODO FIXME: Remove this + RSAPI api.RoomserverInternalAPI +} + // nolint:gocyclo -func (r *RoomserverInternalAPI) PerformInvite( +func (r *Inviter) PerformInvite( ctx context.Context, req *api.PerformInviteRequest, res *api.PerformInviteResponse, -) error { +) ([]api.OutputEvent, error) { event := req.Event if event.StateKey() == nil { - return fmt.Errorf("invite must be a state event") + return nil, fmt.Errorf("invite must be a state event") } roomID := event.RoomID() targetUserID := *event.StateKey() info, err := r.DB.RoomInfo(ctx, roomID) if err != nil { - return fmt.Errorf("Failed to load RoomInfo: %w", err) + return nil, fmt.Errorf("Failed to load RoomInfo: %w", err) } log.WithFields(log.Fields{ @@ -52,11 +63,11 @@ func (r *RoomserverInternalAPI) PerformInvite( } if len(inviteState) == 0 { if err = event.SetUnsignedField("invite_room_state", struct{}{}); err != nil { - return fmt.Errorf("event.SetUnsignedField: %w", err) + return nil, fmt.Errorf("event.SetUnsignedField: %w", err) } } else { if err = event.SetUnsignedField("invite_room_state", inviteState); err != nil { - return fmt.Errorf("event.SetUnsignedField: %w", err) + return nil, fmt.Errorf("event.SetUnsignedField: %w", err) } } @@ -64,7 +75,7 @@ func (r *RoomserverInternalAPI) PerformInvite( if info != nil { _, isAlreadyJoined, err = r.DB.GetMembership(ctx, info.RoomNID, *event.StateKey()) if err != nil { - return fmt.Errorf("r.DB.GetMembership: %w", err) + return nil, fmt.Errorf("r.DB.GetMembership: %w", err) } } if isAlreadyJoined { @@ -99,7 +110,7 @@ func (r *RoomserverInternalAPI) PerformInvite( Code: api.PerformErrorNotAllowed, Msg: "User is already joined to room", } - return nil + return nil, nil } if isOriginLocal { @@ -107,7 +118,7 @@ func (r *RoomserverInternalAPI) PerformInvite( // try and see if the user is allowed to make this invite. We can't do // this for invites coming in over federation - we have to take those on // trust. - _, err = checkAuthEvents(ctx, r.DB, event, event.AuthEventIDs()) + _, err = helpers.CheckAuthEvents(ctx, r.DB, event, event.AuthEventIDs()) if err != nil { log.WithError(err).WithField("event_id", event.EventID()).WithField("auth_event_ids", event.AuthEventIDs()).Error( "processInviteEvent.checkAuthEvents failed for event", @@ -117,9 +128,9 @@ func (r *RoomserverInternalAPI) PerformInvite( Msg: err.Error(), Code: api.PerformErrorNotAllowed, } - return nil + return nil, nil } - return fmt.Errorf("checkAuthEvents: %w", err) + return nil, fmt.Errorf("checkAuthEvents: %w", err) } // If the invite originated from us and the target isn't local then we @@ -133,13 +144,13 @@ func (r *RoomserverInternalAPI) PerformInvite( InviteRoomState: inviteState, } fsRes := &federationSenderAPI.PerformInviteResponse{} - if err = r.fsAPI.PerformInvite(ctx, fsReq, fsRes); err != nil { + if err = r.FSAPI.PerformInvite(ctx, fsReq, fsRes); err != nil { res.Error = &api.PerformError{ Msg: err.Error(), Code: api.PerformErrorNoOperation, } - log.WithError(err).WithField("event_id", event.EventID()).Error("r.fsAPI.PerformInvite failed") - return nil + log.WithError(err).WithField("event_id", event.EventID()).Error("r.FSAPI.PerformInvite failed") + return nil, nil } event = fsRes.Event } @@ -159,8 +170,8 @@ func (r *RoomserverInternalAPI) PerformInvite( }, } inputRes := &api.InputRoomEventsResponse{} - if err = r.InputRoomEvents(context.Background(), inputReq, inputRes); err != nil { - return fmt.Errorf("r.InputRoomEvents: %w", err) + if err = r.RSAPI.InputRoomEvents(context.Background(), inputReq, inputRes); err != nil { + return nil, fmt.Errorf("r.InputRoomEvents: %w", err) } } else { // The invite originated over federation. Process the membership @@ -168,25 +179,23 @@ func (r *RoomserverInternalAPI) PerformInvite( // invite. updater, err := r.DB.MembershipUpdater(ctx, roomID, targetUserID, isTargetLocal, req.RoomVersion) if err != nil { - return fmt.Errorf("r.DB.MembershipUpdater: %w", err) + return nil, fmt.Errorf("r.DB.MembershipUpdater: %w", err) } unwrapped := event.Unwrap() - outputUpdates, err := updateToInviteMembership(updater, &unwrapped, nil, req.Event.RoomVersion) + outputUpdates, err := helpers.UpdateToInviteMembership(updater, &unwrapped, nil, req.Event.RoomVersion) if err != nil { - return fmt.Errorf("updateToInviteMembership: %w", err) + return nil, fmt.Errorf("updateToInviteMembership: %w", err) } if err = updater.Commit(); err != nil { - return fmt.Errorf("updater.Commit: %w", err) + return nil, fmt.Errorf("updater.Commit: %w", err) } - if err = r.WriteOutputEvents(roomID, outputUpdates); err != nil { - return fmt.Errorf("r.WriteOutputEvents: %w", err) - } + return outputUpdates, nil } - return nil + return nil, nil } func buildInviteStrippedState( diff --git a/roomserver/internal/perform_join.go b/roomserver/internal/perform/perform_join.go similarity index 89% rename from roomserver/internal/perform_join.go rename to roomserver/internal/perform/perform_join.go index 3b9b1b3c..c8e6e8e6 100644 --- a/roomserver/internal/perform_join.go +++ b/roomserver/internal/perform/perform_join.go @@ -1,4 +1,4 @@ -package internal +package perform import ( "context" @@ -8,14 +8,27 @@ import ( "time" fsAPI "github.com/matrix-org/dendrite/federationsender/api" + "github.com/matrix-org/dendrite/internal/config" "github.com/matrix-org/dendrite/internal/eventutil" "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" + "github.com/matrix-org/dendrite/roomserver/storage" "github.com/matrix-org/gomatrixserverlib" "github.com/sirupsen/logrus" ) +type Joiner struct { + ServerName gomatrixserverlib.ServerName + Cfg *config.RoomServer + FSAPI fsAPI.FederationSenderInternalAPI + DB storage.Database + + // TODO FIXME: Remove this + RSAPI api.RoomserverInternalAPI +} + // PerformJoin handles joining matrix rooms, including over federation by talking to the federationsender. -func (r *RoomserverInternalAPI) PerformJoin( +func (r *Joiner) PerformJoin( ctx context.Context, req *api.PerformJoinRequest, res *api.PerformJoinResponse, @@ -34,7 +47,7 @@ func (r *RoomserverInternalAPI) PerformJoin( res.RoomID = roomID } -func (r *RoomserverInternalAPI) performJoin( +func (r *Joiner) performJoin( ctx context.Context, req *api.PerformJoinRequest, ) (string, error) { @@ -63,7 +76,7 @@ func (r *RoomserverInternalAPI) performJoin( } } -func (r *RoomserverInternalAPI) performJoinRoomByAlias( +func (r *Joiner) performJoinRoomByAlias( ctx context.Context, req *api.PerformJoinRequest, ) (string, error) { @@ -85,7 +98,7 @@ func (r *RoomserverInternalAPI) performJoinRoomByAlias( ServerName: domain, // the server to ask } dirRes := fsAPI.PerformDirectoryLookupResponse{} - err = r.fsAPI.PerformDirectoryLookup(ctx, &dirReq, &dirRes) + err = r.FSAPI.PerformDirectoryLookup(ctx, &dirReq, &dirRes) if err != nil { logrus.WithError(err).Errorf("error looking up alias %q", req.RoomIDOrAlias) return "", fmt.Errorf("Looking up alias %q over federation failed: %w", req.RoomIDOrAlias, err) @@ -112,7 +125,7 @@ func (r *RoomserverInternalAPI) performJoinRoomByAlias( // TODO: Break this function up a bit // nolint:gocyclo -func (r *RoomserverInternalAPI) performJoinRoomByID( +func (r *Joiner) performJoinRoomByID( ctx context.Context, req *api.PerformJoinRequest, ) (string, error) { @@ -161,8 +174,8 @@ func (r *RoomserverInternalAPI) performJoinRoomByID( // 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. - serverInRoom, _ := r.isServerCurrentlyInRoom(ctx, r.ServerName, req.RoomIDOrAlias) - isInvitePending, inviteSender, _, err := r.isInvitePending(ctx, req.RoomIDOrAlias, req.UserID) + serverInRoom, _ := helpers.IsServerCurrentlyInRoom(ctx, r.DB, r.ServerName, req.RoomIDOrAlias) + isInvitePending, inviteSender, _, err := helpers.IsInvitePending(ctx, r.DB, req.RoomIDOrAlias, req.UserID) if err == nil && isInvitePending && !serverInRoom { // Check if there's an invite pending. _, inviterDomain, ierr := gomatrixserverlib.SplitID('@', inviteSender) @@ -194,7 +207,7 @@ func (r *RoomserverInternalAPI) performJoinRoomByID( &eb, // the template join event r.Cfg.Matrix, // the server configuration time.Now(), // the event timestamp to use - r, // the roomserver API to use + r.RSAPI, // the roomserver API to use &buildRes, // the query response ) @@ -228,7 +241,7 @@ func (r *RoomserverInternalAPI) performJoinRoomByID( }, } inputRes := api.InputRoomEventsResponse{} - if err = r.InputRoomEvents(ctx, &inputReq, &inputRes); err != nil { + if err = r.RSAPI.InputRoomEvents(ctx, &inputReq, &inputRes); err != nil { var notAllowed *gomatrixserverlib.NotAllowed if errors.As(err, ¬Allowed) { return "", &api.PerformError{ @@ -271,7 +284,7 @@ func (r *RoomserverInternalAPI) performJoinRoomByID( return req.RoomIDOrAlias, nil } -func (r *RoomserverInternalAPI) performFederatedJoinRoomByID( +func (r *Joiner) performFederatedJoinRoomByID( ctx context.Context, req *api.PerformJoinRequest, ) error { @@ -283,7 +296,7 @@ func (r *RoomserverInternalAPI) performFederatedJoinRoomByID( Content: req.Content, // the membership event content } fedRes := fsAPI.PerformJoinResponse{} - r.fsAPI.PerformJoin(ctx, &fedReq, &fedRes) + r.FSAPI.PerformJoin(ctx, &fedReq, &fedRes) if fedRes.LastError != nil { return &api.PerformError{ Code: api.PerformErrRemote, diff --git a/roomserver/internal/perform_leave.go b/roomserver/internal/perform/perform_leave.go similarity index 53% rename from roomserver/internal/perform_leave.go rename to roomserver/internal/perform/perform_leave.go index b8603147..b4053eed 100644 --- a/roomserver/internal/perform_leave.go +++ b/roomserver/internal/perform/perform_leave.go @@ -1,4 +1,4 @@ -package internal +package perform import ( "context" @@ -7,39 +7,50 @@ import ( "time" fsAPI "github.com/matrix-org/dendrite/federationsender/api" + "github.com/matrix-org/dendrite/internal/config" "github.com/matrix-org/dendrite/internal/eventutil" "github.com/matrix-org/dendrite/roomserver/api" - "github.com/matrix-org/dendrite/roomserver/types" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" + "github.com/matrix-org/dendrite/roomserver/storage" "github.com/matrix-org/gomatrixserverlib" ) +type Leaver struct { + Cfg *config.RoomServer + DB storage.Database + FSAPI fsAPI.FederationSenderInternalAPI + + // TODO FIXME: Remove this + RSAPI api.RoomserverInternalAPI +} + // WriteOutputEvents implements OutputRoomEventWriter -func (r *RoomserverInternalAPI) PerformLeave( +func (r *Leaver) PerformLeave( ctx context.Context, req *api.PerformLeaveRequest, res *api.PerformLeaveResponse, -) error { +) ([]api.OutputEvent, error) { _, domain, err := gomatrixserverlib.SplitID('@', req.UserID) if err != nil { - return fmt.Errorf("Supplied user ID %q in incorrect format", req.UserID) + return nil, fmt.Errorf("Supplied user ID %q in incorrect format", req.UserID) } if domain != r.Cfg.Matrix.ServerName { - return fmt.Errorf("User %q does not belong to this homeserver", req.UserID) + return nil, fmt.Errorf("User %q does not belong to this homeserver", req.UserID) } if strings.HasPrefix(req.RoomID, "!") { return r.performLeaveRoomByID(ctx, req, res) } - return fmt.Errorf("Room ID %q is invalid", req.RoomID) + return nil, fmt.Errorf("Room ID %q is invalid", req.RoomID) } -func (r *RoomserverInternalAPI) performLeaveRoomByID( +func (r *Leaver) performLeaveRoomByID( ctx context.Context, req *api.PerformLeaveRequest, res *api.PerformLeaveResponse, // nolint:unparam -) error { +) ([]api.OutputEvent, error) { // If there's an invite outstanding for the room then respond to // that. - isInvitePending, senderUser, eventID, err := r.isInvitePending(ctx, req.RoomID, req.UserID) + isInvitePending, senderUser, eventID, err := helpers.IsInvitePending(ctx, r.DB, req.RoomID, req.UserID) if err == nil && isInvitePending { return r.performRejectInvite(ctx, req, res, senderUser, eventID) } @@ -56,25 +67,25 @@ func (r *RoomserverInternalAPI) performLeaveRoomByID( }, } latestRes := api.QueryLatestEventsAndStateResponse{} - if err = r.QueryLatestEventsAndState(ctx, &latestReq, &latestRes); err != nil { - return err + if err = r.RSAPI.QueryLatestEventsAndState(ctx, &latestReq, &latestRes); err != nil { + return nil, err } if !latestRes.RoomExists { - return fmt.Errorf("Room %q does not exist", req.RoomID) + return nil, fmt.Errorf("Room %q does not exist", req.RoomID) } // Now let's see if the user is in the room. if len(latestRes.StateEvents) == 0 { - return fmt.Errorf("User %q is not a member of room %q", req.UserID, req.RoomID) + return nil, fmt.Errorf("User %q is not a member of room %q", req.UserID, req.RoomID) } membership, err := latestRes.StateEvents[0].Membership() if err != nil { - return fmt.Errorf("Error getting membership: %w", err) + return nil, fmt.Errorf("Error getting membership: %w", err) } if membership != gomatrixserverlib.Join { // TODO: should be able to handle "invite" in this case too, if // it's a case of kicking or banning or such - return fmt.Errorf("User %q is not joined to the room (membership is %q)", req.UserID, membership) + return nil, fmt.Errorf("User %q is not joined to the room (membership is %q)", req.UserID, membership) } // Prepare the template for the leave event. @@ -87,10 +98,10 @@ func (r *RoomserverInternalAPI) performLeaveRoomByID( Redacts: "", } if err = eb.SetContent(map[string]interface{}{"membership": "leave"}); err != nil { - return fmt.Errorf("eb.SetContent: %w", err) + return nil, fmt.Errorf("eb.SetContent: %w", err) } if err = eb.SetUnsigned(struct{}{}); err != nil { - return fmt.Errorf("eb.SetUnsigned: %w", err) + return nil, fmt.Errorf("eb.SetUnsigned: %w", err) } // We know that the user is in the room at this point so let's build @@ -103,11 +114,11 @@ func (r *RoomserverInternalAPI) performLeaveRoomByID( &eb, // the template leave event r.Cfg.Matrix, // the server configuration time.Now(), // the event timestamp to use - r, // the roomserver API to use + r.RSAPI, // the roomserver API to use &buildRes, // the query response ) if err != nil { - return fmt.Errorf("eventutil.BuildEvent: %w", err) + return nil, fmt.Errorf("eventutil.BuildEvent: %w", err) } // Give our leave event to the roomserver input stream. The @@ -124,22 +135,22 @@ func (r *RoomserverInternalAPI) performLeaveRoomByID( }, } inputRes := api.InputRoomEventsResponse{} - if err = r.InputRoomEvents(ctx, &inputReq, &inputRes); err != nil { - return fmt.Errorf("r.InputRoomEvents: %w", err) + if err = r.RSAPI.InputRoomEvents(ctx, &inputReq, &inputRes); err != nil { + return nil, fmt.Errorf("r.InputRoomEvents: %w", err) } - return nil + return nil, nil } -func (r *RoomserverInternalAPI) performRejectInvite( +func (r *Leaver) performRejectInvite( ctx context.Context, req *api.PerformLeaveRequest, res *api.PerformLeaveResponse, // nolint:unparam senderUser, eventID string, -) error { +) ([]api.OutputEvent, error) { _, domain, err := gomatrixserverlib.SplitID('@', senderUser) if err != nil { - return fmt.Errorf("User ID %q invalid: %w", senderUser, err) + return nil, fmt.Errorf("User ID %q invalid: %w", senderUser, err) } // Ask the federation sender to perform a federated leave for us. @@ -149,13 +160,13 @@ func (r *RoomserverInternalAPI) performRejectInvite( ServerNames: []gomatrixserverlib.ServerName{domain}, } leaveRes := fsAPI.PerformLeaveResponse{} - if err := r.fsAPI.PerformLeave(ctx, &leaveReq, &leaveRes); err != nil { - return err + if err := r.FSAPI.PerformLeave(ctx, &leaveReq, &leaveRes); err != nil { + return nil, err } // Withdraw the invite, so that the sync API etc are // notified that we rejected it. - return r.WriteOutputEvents(req.RoomID, []api.OutputEvent{ + return []api.OutputEvent{ { Type: api.OutputTypeRetireInviteEvent, RetireInviteEvent: &api.OutputRetireInviteEvent{ @@ -164,60 +175,5 @@ func (r *RoomserverInternalAPI) performRejectInvite( TargetUserID: req.UserID, }, }, - }) -} - -func (r *RoomserverInternalAPI) isInvitePending( - ctx context.Context, - roomID, userID string, -) (bool, string, string, error) { - // Look up the room NID for the supplied room ID. - info, err := r.DB.RoomInfo(ctx, roomID) - if err != nil { - return false, "", "", fmt.Errorf("r.DB.RoomInfo: %w", err) - } - if info == nil { - return false, "", "", fmt.Errorf("cannot get RoomInfo: unknown room ID %s", roomID) - } - - // Look up the state key NID for the supplied user ID. - targetUserNIDs, err := r.DB.EventStateKeyNIDs(ctx, []string{userID}) - if err != nil { - return false, "", "", fmt.Errorf("r.DB.EventStateKeyNIDs: %w", err) - } - targetUserNID, targetUserFound := targetUserNIDs[userID] - if !targetUserFound { - return false, "", "", fmt.Errorf("missing NID for user %q (%+v)", userID, targetUserNIDs) - } - - // Let's see if we have an event active for the user in the room. If - // we do then it will contain a server name that we can direct the - // send_leave to. - senderUserNIDs, eventIDs, err := r.DB.GetInvitesForUser(ctx, info.RoomNID, targetUserNID) - if err != nil { - return false, "", "", fmt.Errorf("r.DB.GetInvitesForUser: %w", err) - } - if len(senderUserNIDs) == 0 { - return false, "", "", nil - } - userNIDToEventID := make(map[types.EventStateKeyNID]string) - for i, nid := range senderUserNIDs { - userNIDToEventID[nid] = eventIDs[i] - } - - // Look up the user ID from the NID. - senderUsers, err := r.DB.EventStateKeys(ctx, senderUserNIDs) - if err != nil { - return false, "", "", fmt.Errorf("r.DB.EventStateKeys: %w", err) - } - if len(senderUsers) == 0 { - return false, "", "", fmt.Errorf("no senderUsers") - } - - senderUser, senderUserFound := senderUsers[senderUserNIDs[0]] - if !senderUserFound { - return false, "", "", fmt.Errorf("missing user for NID %d (%+v)", senderUserNIDs[0], senderUsers) - } - - return true, senderUser, userNIDToEventID[senderUserNIDs[0]], nil + }, nil } diff --git a/roomserver/internal/perform_publish.go b/roomserver/internal/perform/perform_publish.go similarity index 67% rename from roomserver/internal/perform_publish.go rename to roomserver/internal/perform/perform_publish.go index d7863620..aab282f3 100644 --- a/roomserver/internal/perform_publish.go +++ b/roomserver/internal/perform/perform_publish.go @@ -1,12 +1,17 @@ -package internal +package perform import ( "context" "github.com/matrix-org/dendrite/roomserver/api" + "github.com/matrix-org/dendrite/roomserver/storage" ) -func (r *RoomserverInternalAPI) PerformPublish( +type Publisher struct { + DB storage.Database +} + +func (r *Publisher) PerformPublish( ctx context.Context, req *api.PerformPublishRequest, res *api.PerformPublishResponse, diff --git a/roomserver/internal/query.go b/roomserver/internal/query.go index f8e8ba04..26b22c74 100644 --- a/roomserver/internal/query.go +++ b/roomserver/internal/query.go @@ -20,11 +20,9 @@ import ( "context" "fmt" - "github.com/matrix-org/dendrite/internal/eventutil" "github.com/matrix-org/dendrite/roomserver/api" - "github.com/matrix-org/dendrite/roomserver/auth" + "github.com/matrix-org/dendrite/roomserver/internal/helpers" "github.com/matrix-org/dendrite/roomserver/state" - "github.com/matrix-org/dendrite/roomserver/storage" "github.com/matrix-org/dendrite/roomserver/types" "github.com/matrix-org/dendrite/roomserver/version" "github.com/matrix-org/gomatrixserverlib" @@ -74,7 +72,7 @@ func (r *RoomserverInternalAPI) QueryLatestEventsAndState( return err } - stateEvents, err := r.loadStateEvents(ctx, stateEntries) + stateEvents, err := helpers.LoadStateEvents(ctx, r.DB, stateEntries) if err != nil { return err } @@ -123,7 +121,7 @@ func (r *RoomserverInternalAPI) QueryStateAfterEvents( return err } - stateEvents, err := r.loadStateEvents(ctx, stateEntries) + stateEvents, err := helpers.LoadStateEvents(ctx, r.DB, stateEntries) if err != nil { return err } @@ -151,7 +149,7 @@ func (r *RoomserverInternalAPI) QueryEventsByID( eventNIDs = append(eventNIDs, nid) } - events, err := r.loadEvents(ctx, eventNIDs) + events, err := helpers.LoadEvents(ctx, r.DB, eventNIDs) if err != nil { return err } @@ -168,31 +166,6 @@ func (r *RoomserverInternalAPI) QueryEventsByID( return nil } -func (r *RoomserverInternalAPI) loadStateEvents( - ctx context.Context, stateEntries []types.StateEntry, -) ([]gomatrixserverlib.Event, error) { - eventNIDs := make([]types.EventNID, len(stateEntries)) - for i := range stateEntries { - eventNIDs[i] = stateEntries[i].EventNID - } - return r.loadEvents(ctx, eventNIDs) -} - -func (r *RoomserverInternalAPI) loadEvents( - ctx context.Context, eventNIDs []types.EventNID, -) ([]gomatrixserverlib.Event, error) { - stateEvents, err := r.DB.Events(ctx, eventNIDs) - if err != nil { - return nil, err - } - - result := make([]gomatrixserverlib.Event, len(stateEvents)) - for i := range stateEvents { - result[i] = stateEvents[i].Event - } - return result, nil -} - // QueryMembershipForUser implements api.RoomserverInternalAPI func (r *RoomserverInternalAPI) QueryMembershipForUser( ctx context.Context, @@ -266,12 +239,12 @@ func (r *RoomserverInternalAPI) QueryMembershipsForRoom( events, err = r.DB.Events(ctx, eventNIDs) } else { - stateEntries, err = stateBeforeEvent(ctx, r.DB, *info, membershipEventNID) + stateEntries, err = helpers.StateBeforeEvent(ctx, r.DB, *info, membershipEventNID) if err != nil { logrus.WithField("membership_event_nid", membershipEventNID).WithError(err).Error("failed to load state before event") return err } - events, err = getMembershipsAtState(ctx, r.DB, stateEntries, request.JoinedOnly) + events, err = helpers.GetMembershipsAtState(ctx, r.DB, stateEntries, request.JoinedOnly) } if err != nil { @@ -286,65 +259,6 @@ func (r *RoomserverInternalAPI) QueryMembershipsForRoom( return nil } -func stateBeforeEvent(ctx context.Context, db storage.Database, info types.RoomInfo, eventNID types.EventNID) ([]types.StateEntry, error) { - roomState := state.NewStateResolution(db, info) - // Lookup the event NID - eIDs, err := db.EventIDs(ctx, []types.EventNID{eventNID}) - if err != nil { - return nil, err - } - eventIDs := []string{eIDs[eventNID]} - - prevState, err := db.StateAtEventIDs(ctx, eventIDs) - if err != nil { - return nil, err - } - - // Fetch the state as it was when this event was fired - return roomState.LoadCombinedStateAfterEvents(ctx, prevState) -} - -// getMembershipsAtState filters the state events to -// only keep the "m.room.member" events with a "join" membership. These events are returned. -// Returns an error if there was an issue fetching the events. -func getMembershipsAtState( - ctx context.Context, db storage.Database, stateEntries []types.StateEntry, joinedOnly bool, -) ([]types.Event, error) { - - var eventNIDs []types.EventNID - for _, entry := range stateEntries { - // Filter the events to retrieve to only keep the membership events - if entry.EventTypeNID == types.MRoomMemberNID { - eventNIDs = append(eventNIDs, entry.EventNID) - } - } - - // Get all of the events in this state - stateEvents, err := db.Events(ctx, eventNIDs) - if err != nil { - return nil, err - } - - if !joinedOnly { - return stateEvents, nil - } - - // Filter the events to only keep the "join" membership events - var events []types.Event - for _, event := range stateEvents { - membership, err := event.Membership() - if err != nil { - return nil, err - } - - if membership == gomatrixserverlib.Join { - events = append(events, event) - } - } - - return events, nil -} - // QueryServerAllowedToSeeEvent implements api.RoomserverInternalAPI func (r *RoomserverInternalAPI) QueryServerAllowedToSeeEvent( ctx context.Context, @@ -360,7 +274,7 @@ func (r *RoomserverInternalAPI) QueryServerAllowedToSeeEvent( return } roomID := events[0].RoomID() - isServerInRoom, err := r.isServerCurrentlyInRoom(ctx, request.ServerName, roomID) + isServerInRoom, err := helpers.IsServerCurrentlyInRoom(ctx, r.DB, request.ServerName, roomID) if err != nil { return } @@ -371,31 +285,12 @@ func (r *RoomserverInternalAPI) QueryServerAllowedToSeeEvent( if info == nil { return fmt.Errorf("QueryServerAllowedToSeeEvent: no room info for room %s", roomID) } - response.AllowedToSeeEvent, err = r.checkServerAllowedToSeeEvent( - ctx, *info, request.EventID, request.ServerName, isServerInRoom, + response.AllowedToSeeEvent, err = helpers.CheckServerAllowedToSeeEvent( + ctx, r.DB, *info, request.EventID, request.ServerName, isServerInRoom, ) return } -func (r *RoomserverInternalAPI) checkServerAllowedToSeeEvent( - ctx context.Context, info types.RoomInfo, eventID string, serverName gomatrixserverlib.ServerName, isServerInRoom bool, -) (bool, error) { - roomState := state.NewStateResolution(r.DB, info) - stateEntries, err := roomState.LoadStateAtEvent(ctx, eventID) - if err != nil { - return false, err - } - - // TODO: We probably want to make it so that we don't have to pull - // out all the state if possible. - stateAtEvent, err := r.loadStateEvents(ctx, stateEntries) - if err != nil { - return false, err - } - - return auth.IsServerAllowed(serverName, isServerInRoom, stateAtEvent), nil -} - // QueryMissingEvents implements api.RoomserverInternalAPI // nolint:gocyclo func (r *RoomserverInternalAPI) QueryMissingEvents( @@ -431,12 +326,12 @@ func (r *RoomserverInternalAPI) QueryMissingEvents( return fmt.Errorf("missing RoomInfo for room %s", events[0].RoomID()) } - resultNIDs, err := r.scanEventTree(ctx, *info, front, visited, request.Limit, request.ServerName) + resultNIDs, err := helpers.ScanEventTree(ctx, r.DB, *info, front, visited, request.Limit, request.ServerName) if err != nil { return err } - loadedEvents, err := r.loadEvents(ctx, resultNIDs) + loadedEvents, err := helpers.LoadEvents(ctx, r.DB, resultNIDs) if err != nil { return err } @@ -456,299 +351,6 @@ func (r *RoomserverInternalAPI) QueryMissingEvents( return err } -// PerformBackfill implements api.RoomServerQueryAPI -func (r *RoomserverInternalAPI) PerformBackfill( - ctx context.Context, - request *api.PerformBackfillRequest, - response *api.PerformBackfillResponse, -) error { - // if we are requesting the backfill then we need to do a federation hit - // TODO: we could be more sensible and fetch as many events we already have then request the rest - // which is what the syncapi does already. - if request.ServerName == r.ServerName { - return r.backfillViaFederation(ctx, request, response) - } - // someone else is requesting the backfill, try to service their request. - var err error - var front []string - - // The limit defines the maximum number of events to retrieve, so it also - // defines the highest number of elements in the map below. - visited := make(map[string]bool, request.Limit) - - // this will include these events which is what we want - front = request.PrevEventIDs() - - info, err := r.DB.RoomInfo(ctx, request.RoomID) - if err != nil { - return err - } - if info == nil || info.IsStub { - return fmt.Errorf("PerformBackfill: missing room info for room %s", request.RoomID) - } - - // Scan the event tree for events to send back. - resultNIDs, err := r.scanEventTree(ctx, *info, front, visited, request.Limit, request.ServerName) - if err != nil { - return err - } - - // Retrieve events from the list that was filled previously. - var loadedEvents []gomatrixserverlib.Event - loadedEvents, err = r.loadEvents(ctx, resultNIDs) - if err != nil { - return err - } - - for _, event := range loadedEvents { - response.Events = append(response.Events, event.Headered(info.RoomVersion)) - } - - return err -} - -func (r *RoomserverInternalAPI) backfillViaFederation(ctx context.Context, req *api.PerformBackfillRequest, res *api.PerformBackfillResponse) error { - roomVer, err := r.roomVersion(req.RoomID) - if err != nil { - return fmt.Errorf("backfillViaFederation: unknown room version for room %s : %w", req.RoomID, err) - } - requester := newBackfillRequester(r.DB, r.FedClient, r.ServerName, req.BackwardsExtremities) - // Request 100 items regardless of what the query asks for. - // We don't want to go much higher than this. - // We can't honour exactly the limit as some sytests rely on requesting more for tests to pass - // (so we don't need to hit /state_ids which the test has no listener for) - // Specifically the test "Outbound federation can backfill events" - events, err := gomatrixserverlib.RequestBackfill( - ctx, requester, - r.KeyRing, req.RoomID, roomVer, req.PrevEventIDs(), 100) - if err != nil { - return err - } - logrus.WithField("room_id", req.RoomID).Infof("backfilled %d events", len(events)) - - // persist these new events - auth checks have already been done - roomNID, backfilledEventMap := persistEvents(ctx, r.DB, events) - if err != nil { - return err - } - - for _, ev := range backfilledEventMap { - // now add state for these events - stateIDs, ok := requester.eventIDToBeforeStateIDs[ev.EventID()] - if !ok { - // this should be impossible as all events returned must have pass Step 5 of the PDU checks - // which requires a list of state IDs. - logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to find state IDs for event which passed auth checks") - continue - } - var entries []types.StateEntry - if entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs); err != nil { - // attempt to fetch the missing events - r.fetchAndStoreMissingEvents(ctx, roomVer, requester, stateIDs) - // try again - entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs) - if err != nil { - logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to get state entries for event") - return err - } - } - - var beforeStateSnapshotNID types.StateSnapshotNID - if beforeStateSnapshotNID, err = r.DB.AddState(ctx, roomNID, nil, entries); err != nil { - logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to persist state entries to get snapshot nid") - return err - } - if err = r.DB.SetState(ctx, ev.EventNID, beforeStateSnapshotNID); err != nil { - logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to persist snapshot nid") - } - } - - // TODO: update backwards extremities, as that should be moved from syncapi to roomserver at some point. - - res.Events = events - return nil -} - -func (r *RoomserverInternalAPI) isServerCurrentlyInRoom(ctx context.Context, serverName gomatrixserverlib.ServerName, roomID string) (bool, error) { - info, err := r.DB.RoomInfo(ctx, roomID) - if err != nil { - return false, err - } - if info == nil { - return false, fmt.Errorf("unknown room %s", roomID) - } - - eventNIDs, err := r.DB.GetMembershipEventNIDsForRoom(ctx, info.RoomNID, true, false) - if err != nil { - return false, err - } - - events, err := r.DB.Events(ctx, eventNIDs) - if err != nil { - return false, err - } - gmslEvents := make([]gomatrixserverlib.Event, len(events)) - for i := range events { - gmslEvents[i] = events[i].Event - } - return auth.IsAnyUserOnServerWithMembership(serverName, gmslEvents, gomatrixserverlib.Join), nil -} - -// fetchAndStoreMissingEvents does a best-effort fetch and store of missing events specified in stateIDs. Returns no error as it is just -// best effort. -func (r *RoomserverInternalAPI) fetchAndStoreMissingEvents(ctx context.Context, roomVer gomatrixserverlib.RoomVersion, - backfillRequester *backfillRequester, stateIDs []string) { - - servers := backfillRequester.servers - - // work out which are missing - nidMap, err := r.DB.EventNIDs(ctx, stateIDs) - if err != nil { - util.GetLogger(ctx).WithError(err).Warn("cannot query missing events") - return - } - missingMap := make(map[string]*gomatrixserverlib.HeaderedEvent) // id -> event - for _, id := range stateIDs { - if _, ok := nidMap[id]; !ok { - missingMap[id] = nil - } - } - util.GetLogger(ctx).Infof("Fetching %d missing state events (from %d possible servers)", len(missingMap), len(servers)) - - // fetch the events from federation. Loop the servers first so if we find one that works we stick with them - for _, srv := range servers { - for id, ev := range missingMap { - if ev != nil { - continue // already found - } - logger := util.GetLogger(ctx).WithField("server", srv).WithField("event_id", id) - res, err := r.FedClient.GetEvent(ctx, srv, id) - if err != nil { - logger.WithError(err).Warn("failed to get event from server") - continue - } - loader := gomatrixserverlib.NewEventsLoader(roomVer, r.KeyRing, backfillRequester, backfillRequester.ProvideEvents, false) - result, err := loader.LoadAndVerify(ctx, res.PDUs, gomatrixserverlib.TopologicalOrderByPrevEvents) - if err != nil { - logger.WithError(err).Warn("failed to load and verify event") - continue - } - logger.Infof("returned %d PDUs which made events %+v", len(res.PDUs), result) - for _, res := range result { - if res.Error != nil { - logger.WithError(err).Warn("event failed PDU checks") - continue - } - missingMap[id] = res.Event - } - } - } - - var newEvents []gomatrixserverlib.HeaderedEvent - for _, ev := range missingMap { - if ev != nil { - newEvents = append(newEvents, *ev) - } - } - util.GetLogger(ctx).Infof("Persisting %d new events", len(newEvents)) - persistEvents(ctx, r.DB, newEvents) -} - -// TODO: Remove this when we have tests to assert correctness of this function -// nolint:gocyclo -func (r *RoomserverInternalAPI) scanEventTree( - ctx context.Context, info types.RoomInfo, front []string, visited map[string]bool, limit int, - serverName gomatrixserverlib.ServerName, -) ([]types.EventNID, error) { - var resultNIDs []types.EventNID - var err error - var allowed bool - var events []types.Event - var next []string - var pre string - - // TODO: add tests for this function to ensure it meets the contract that callers expect (and doc what that is supposed to be) - // Currently, callers like PerformBackfill will call scanEventTree with a pre-populated `visited` map, assuming that by doing - // so means that the events in that map will NOT be returned from this function. That is not currently true, resulting in - // duplicate events being sent in response to /backfill requests. - initialIgnoreList := make(map[string]bool, len(visited)) - for k, v := range visited { - initialIgnoreList[k] = v - } - - resultNIDs = make([]types.EventNID, 0, limit) - - var checkedServerInRoom bool - var isServerInRoom bool - - // Loop through the event IDs to retrieve the requested events and go - // through the whole tree (up to the provided limit) using the events' - // "prev_event" key. -BFSLoop: - for len(front) > 0 { - // Prevent unnecessary allocations: reset the slice only when not empty. - if len(next) > 0 { - next = make([]string, 0) - } - // Retrieve the events to process from the database. - events, err = r.DB.EventsFromIDs(ctx, front) - if err != nil { - return resultNIDs, err - } - - if !checkedServerInRoom && len(events) > 0 { - // It's nasty that we have to extract the room ID from an event, but many federation requests - // only talk in event IDs, no room IDs at all (!!!) - ev := events[0] - isServerInRoom, err = r.isServerCurrentlyInRoom(ctx, serverName, ev.RoomID()) - if err != nil { - util.GetLogger(ctx).WithError(err).Error("Failed to check if server is currently in room, assuming not.") - } - checkedServerInRoom = true - } - - for _, ev := range events { - // Break out of the loop if the provided limit is reached. - if len(resultNIDs) == limit { - break BFSLoop - } - - if !initialIgnoreList[ev.EventID()] { - // Update the list of events to retrieve. - resultNIDs = append(resultNIDs, ev.EventNID) - } - // Loop through the event's parents. - for _, pre = range ev.PrevEventIDs() { - // Only add an event to the list of next events to process if it - // hasn't been seen before. - if !visited[pre] { - visited[pre] = true - allowed, err = r.checkServerAllowedToSeeEvent(ctx, info, pre, serverName, isServerInRoom) - if err != nil { - util.GetLogger(ctx).WithField("server", serverName).WithField("event_id", pre).WithError(err).Error( - "Error checking if allowed to see event", - ) - return resultNIDs, err - } - - // If the event hasn't been seen before and the HS - // requesting to retrieve it is allowed to do so, add it to - // the list of events to retrieve. - if allowed { - next = append(next, pre) - } else { - util.GetLogger(ctx).WithField("server", serverName).WithField("event_id", pre).Info("Not allowed to see event") - } - } - } - } - // Repeat the same process with the parent events we just processed. - front = next - } - - return resultNIDs, err -} - // QueryStateAndAuthChain implements api.RoomserverInternalAPI func (r *RoomserverInternalAPI) QueryStateAndAuthChain( ctx context.Context, @@ -823,7 +425,7 @@ func (r *RoomserverInternalAPI) loadStateAtEventIDs(ctx context.Context, roomInf return nil, err } - return r.loadStateEvents(ctx, stateEntries) + return helpers.LoadStateEvents(ctx, r.DB, stateEntries) } type eventsFromIDs func(context.Context, []string) ([]types.Event, error) @@ -879,50 +481,6 @@ func getAuthChain( return authEvents, nil } -func persistEvents(ctx context.Context, db storage.Database, events []gomatrixserverlib.HeaderedEvent) (types.RoomNID, map[string]types.Event) { - var roomNID types.RoomNID - backfilledEventMap := make(map[string]types.Event) - for j, ev := range events { - nidMap, err := db.EventNIDs(ctx, ev.AuthEventIDs()) - if err != nil { // this shouldn't happen as RequestBackfill already found them - logrus.WithError(err).WithField("auth_events", ev.AuthEventIDs()).Error("Failed to find one or more auth events") - continue - } - authNids := make([]types.EventNID, len(nidMap)) - i := 0 - for _, nid := range nidMap { - authNids[i] = nid - i++ - } - var stateAtEvent types.StateAtEvent - var redactedEventID string - var redactionEvent *gomatrixserverlib.Event - roomNID, stateAtEvent, redactionEvent, redactedEventID, err = db.StoreEvent(ctx, ev.Unwrap(), nil, authNids) - if err != nil { - logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to persist event") - continue - } - // If storing this event results in it being redacted, then do so. - // It's also possible for this event to be a redaction which results in another event being - // redacted, which we don't care about since we aren't returning it in this backfill. - if redactedEventID == ev.EventID() { - eventToRedact := ev.Unwrap() - redactedEvent, err := eventutil.RedactEvent(redactionEvent, &eventToRedact) - if err != nil { - logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to redact event") - continue - } - ev = redactedEvent.Headered(ev.RoomVersion) - events[j] = ev - } - backfilledEventMap[ev.EventID()] = types.Event{ - EventNID: stateAtEvent.StateEntry.EventNID, - Event: ev.Unwrap(), - } - } - return roomNID, backfilledEventMap -} - // QueryRoomVersionCapabilities implements api.RoomserverInternalAPI func (r *RoomserverInternalAPI) QueryRoomVersionCapabilities( ctx context.Context, diff --git a/roomserver/roomserver.go b/roomserver/roomserver.go index 21af5f32..a428ad57 100644 --- a/roomserver/roomserver.go +++ b/roomserver/roomserver.go @@ -47,14 +47,8 @@ func NewInternalAPI( logrus.WithError(err).Panicf("failed to connect to room server db") } - return &internal.RoomserverInternalAPI{ - DB: roomserverDB, - Cfg: cfg, - Producer: base.KafkaProducer, - OutputRoomEventTopic: string(cfg.Matrix.Kafka.TopicFor(config.TopicOutputRoomEvent)), - Cache: base.Caches, - ServerName: cfg.Matrix.ServerName, - FedClient: fedClient, - KeyRing: keyRing, - } + return internal.NewRoomserverAPI( + cfg, roomserverDB, base.KafkaProducer, string(cfg.Matrix.Kafka.TopicFor(config.TopicOutputRoomEvent)), + base.Caches, fedClient, keyRing, + ) }