Honour history_visibility when backfilling (#990)
* Make backfill work for shared history visibility * fetch missing state on backfill to remember snapshots correctly * Fix gmsl to not mux in auth events into room state * Whoops * Linting
This commit is contained in:
Kegsay
GitHub
parent
458b364781
commit
4ad52c67ca
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@ -16,7 +16,9 @@ package routing
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import (
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"context"
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"encoding/json"
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"net/http"
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"time"
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/gomatrixserverlib"
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@ -29,13 +31,20 @@ func GetEvent(
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request *gomatrixserverlib.FederationRequest,
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query api.RoomserverQueryAPI,
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eventID string,
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origin gomatrixserverlib.ServerName,
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) util.JSONResponse {
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event, err := getEvent(ctx, request, query, eventID)
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if err != nil {
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return *err
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}
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return util.JSONResponse{Code: http.StatusOK, JSON: event}
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return util.JSONResponse{Code: http.StatusOK, JSON: gomatrixserverlib.Transaction{
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Origin: origin,
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OriginServerTS: gomatrixserverlib.AsTimestamp(time.Now()),
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PDUs: []json.RawMessage{
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event.JSON(),
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},
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}}
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}
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// getEvent returns the requested event,
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@ -126,7 +126,7 @@ func Setup(
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return util.ErrorResponse(err)
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}
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return GetEvent(
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httpReq.Context(), request, query, vars["eventID"],
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httpReq.Context(), request, query, vars["eventID"], cfg.Matrix.ServerName,
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)
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},
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)).Methods(http.MethodGet)
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2
go.mod
2
go.mod
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@ -17,7 +17,7 @@ require (
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github.com/matrix-org/go-http-js-libp2p v0.0.0-20200318135427-31631a9ef51f
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github.com/matrix-org/go-sqlite3-js v0.0.0-20200325174927-327088cdef10
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github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200429143250-5df6426424bd
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200429162354-392f0b1b7421
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github.com/matrix-org/naffka v0.0.0-20200422140631-181f1ee7401f
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github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7
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github.com/mattn/go-sqlite3 v2.0.2+incompatible
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4
go.sum
4
go.sum
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@ -367,8 +367,8 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
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github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5 h1:kmRjpmFOenVpOaV/DRlo9p6z/IbOKlUC+hhKsAAh8Qg=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200429143250-5df6426424bd h1:YA+1/Y/NK6dHAxRamybQiE6HToTC+5ddPCO4UI7pmH0=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200429143250-5df6426424bd/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200429162354-392f0b1b7421 h1:4zP29YlpfEtJ9a7sZ33Mf0FJInD2N3/KzDcLa62bRKc=
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github.com/matrix-org/gomatrixserverlib v0.0.0-20200429162354-392f0b1b7421/go.mod h1:JsAzE1Ll3+gDWS9JSUHPJiiyAksvOOnGWF2nXdg4ZzU=
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github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1 h1:osLoFdOy+ChQqVUn2PeTDETFftVkl4w9t/OW18g3lnk=
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github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1/go.mod h1:cXoYQIENbdWIQHt1SyCo6Bl3C3raHwJ0wgVrXHSqf+A=
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github.com/matrix-org/naffka v0.0.0-20200422140631-181f1ee7401f h1:pRz4VTiRCO4zPlEMc3ESdUOcW4PXHH4Kj+YDz1XyE+Y=
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@ -27,7 +27,7 @@ func IsServerAllowed(
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serverCurrentlyInRoom bool,
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authEvents []gomatrixserverlib.Event,
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) bool {
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historyVisibility := historyVisibilityForRoom(authEvents)
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historyVisibility := HistoryVisibilityForRoom(authEvents)
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// 1. If the history_visibility was set to world_readable, allow.
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if historyVisibility == "world_readable" {
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@ -52,7 +52,7 @@ func IsServerAllowed(
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return false
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}
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func historyVisibilityForRoom(authEvents []gomatrixserverlib.Event) string {
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func HistoryVisibilityForRoom(authEvents []gomatrixserverlib.Event) string {
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// https://matrix.org/docs/spec/client_server/r0.6.0#id87
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// By default if no history_visibility is set, or if the value is not understood, the visibility is assumed to be shared.
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visibility := "shared"
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@ -3,6 +3,7 @@ package query
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import (
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"context"
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"github.com/matrix-org/dendrite/roomserver/auth"
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"github.com/matrix-org/dendrite/roomserver/storage"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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@ -63,7 +64,7 @@ FederationHit:
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for _, srv := range b.servers { // hit any valid server
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c := gomatrixserverlib.FederatedStateProvider{
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FedClient: b.fedClient,
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AuthEventsOnly: false,
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RememberAuthEvents: false,
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Server: srv,
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}
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res, err := c.StateIDsBeforeEvent(ctx, targetEvent)
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@ -114,7 +115,9 @@ func (b *backfillRequester) calculateNewStateIDs(targetEvent, prevEvent gomatrix
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return nil
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}
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func (b *backfillRequester) StateBeforeEvent(ctx context.Context, roomVer gomatrixserverlib.RoomVersion, event gomatrixserverlib.HeaderedEvent, eventIDs []string) (map[string]*gomatrixserverlib.Event, error) {
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func (b *backfillRequester) StateBeforeEvent(ctx context.Context, roomVer gomatrixserverlib.RoomVersion,
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event gomatrixserverlib.HeaderedEvent, eventIDs []string) (map[string]*gomatrixserverlib.Event, error) {
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// try to fetch the events from the database first
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events, err := b.ProvideEvents(roomVer, eventIDs)
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if err != nil {
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@ -134,7 +137,7 @@ func (b *backfillRequester) StateBeforeEvent(ctx context.Context, roomVer gomatr
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c := gomatrixserverlib.FederatedStateProvider{
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FedClient: b.fedClient,
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AuthEventsOnly: false,
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RememberAuthEvents: false,
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Server: b.servers[0],
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}
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result, err := c.StateBeforeEvent(ctx, roomVer, event, eventIDs)
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@ -160,18 +163,33 @@ func (b *backfillRequester) ServersAtEvent(ctx context.Context, roomID, eventID
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return
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}
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stateEntries, err := stateBeforeEvent(ctx, b.db, NIDs[eventID])
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if err != nil {
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logrus.WithField("event_id", eventID).WithError(err).Error("ServersAtEvent: failed to load state before event")
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return
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}
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// possibly return all joined servers depending on history visiblity
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memberEventsFromVis, err := joinEventsFromHistoryVisibility(ctx, b.db, roomID, stateEntries)
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if err != nil {
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logrus.WithError(err).Error("ServersAtEvent: failed calculate servers from history visibility rules")
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return
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}
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logrus.Infof("ServersAtEvent including %d current events from history visibility", len(memberEventsFromVis))
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// Retrieve all "m.room.member" state events of "join" membership, which
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// contains the list of users in the room before the event, therefore all
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// the servers in it at that moment.
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events, err := getMembershipsBeforeEventNID(ctx, b.db, NIDs[eventID], true)
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memberEvents, err := getMembershipsAtState(ctx, b.db, stateEntries, true)
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if err != nil {
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logrus.WithField("event_id", eventID).WithError(err).Error("ServersAtEvent: failed to get memberships before event")
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return
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}
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memberEvents = append(memberEvents, memberEventsFromVis...)
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// Store the server names in a temporary map to avoid duplicates.
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serverSet := make(map[gomatrixserverlib.ServerName]bool)
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for _, event := range events {
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for _, event := range memberEvents {
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serverSet[event.Origin()] = true
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}
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for server := range serverSet {
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@ -186,7 +204,9 @@ func (b *backfillRequester) ServersAtEvent(ctx context.Context, roomID, eventID
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// Backfill performs a backfill request to the given server.
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// https://matrix.org/docs/spec/server_server/latest#get-matrix-federation-v1-backfill-roomid
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func (b *backfillRequester) Backfill(ctx context.Context, server gomatrixserverlib.ServerName, roomID string, fromEventIDs []string, limit int) (*gomatrixserverlib.Transaction, error) {
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func (b *backfillRequester) Backfill(ctx context.Context, server gomatrixserverlib.ServerName, roomID string,
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fromEventIDs []string, limit int) (*gomatrixserverlib.Transaction, error) {
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tx, err := b.fedClient.Backfill(ctx, server, roomID, limit, fromEventIDs)
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return &tx, err
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}
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@ -215,3 +235,44 @@ func (b *backfillRequester) ProvideEvents(roomVer gomatrixserverlib.RoomVersion,
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}
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return events, nil
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}
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// joinEventsFromHistoryVisibility returns all CURRENTLY joined members if the provided state indicated a 'shared' history visibility.
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// TODO: Long term we probably want a history_visibility table which stores eventNID | visibility_enum so we can just
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// pull all events and then filter by that table.
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func joinEventsFromHistoryVisibility(
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ctx context.Context, db storage.Database, roomID string, stateEntries []types.StateEntry) ([]types.Event, error) {
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var eventNIDs []types.EventNID
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for _, entry := range stateEntries {
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// Filter the events to retrieve to only keep the membership events
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if entry.EventTypeNID == types.MRoomHistoryVisibilityNID && entry.EventStateKeyNID == types.EmptyStateKeyNID {
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eventNIDs = append(eventNIDs, entry.EventNID)
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break
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}
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}
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// Get all of the events in this state
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stateEvents, err := db.Events(ctx, eventNIDs)
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if err != nil {
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return nil, err
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}
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events := make([]gomatrixserverlib.Event, len(stateEvents))
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for i := range stateEvents {
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events[i] = stateEvents[i].Event
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}
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visibility := auth.HistoryVisibilityForRoom(events)
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if visibility != "shared" {
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logrus.Infof("ServersAtEvent history visibility not shared: %s", visibility)
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return nil, nil
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}
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// get joined members
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roomNID, err := db.RoomNID(ctx, roomID)
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if err != nil {
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return nil, err
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}
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joinEventNIDs, err := db.GetMembershipEventNIDsForRoom(ctx, roomNID, true)
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if err != nil {
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return nil, err
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}
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return db.Events(ctx, joinEventNIDs)
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}
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@ -277,6 +277,7 @@ func (r *RoomserverQueryAPI) QueryMembershipsForRoom(
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response.JoinEvents = []gomatrixserverlib.ClientEvent{}
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var events []types.Event
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var stateEntries []types.StateEntry
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if stillInRoom {
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var eventNIDs []types.EventNID
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eventNIDs, err = r.DB.GetMembershipEventNIDsForRoom(ctx, roomNID, request.JoinedOnly)
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@ -286,7 +287,12 @@ func (r *RoomserverQueryAPI) QueryMembershipsForRoom(
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events, err = r.DB.Events(ctx, eventNIDs)
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} else {
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events, err = getMembershipsBeforeEventNID(ctx, r.DB, membershipEventNID, request.JoinedOnly)
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stateEntries, err = stateBeforeEvent(ctx, r.DB, membershipEventNID)
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if err != nil {
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logrus.WithField("membership_event_nid", membershipEventNID).WithError(err).Error("failed to load state before event")
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return err
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}
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events, err = getMembershipsAtState(ctx, r.DB, stateEntries, request.JoinedOnly)
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}
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if err != nil {
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@ -301,15 +307,8 @@ func (r *RoomserverQueryAPI) QueryMembershipsForRoom(
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return nil
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}
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// getMembershipsBeforeEventNID takes the numeric ID of an event and fetches the state
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// of the event's room as it was when this event was fired, then filters the state events to
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// only keep the "m.room.member" events with a "join" membership. These events are returned.
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// Returns an error if there was an issue fetching the events.
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func getMembershipsBeforeEventNID(
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ctx context.Context, db storage.Database, eventNID types.EventNID, joinedOnly bool,
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) ([]types.Event, error) {
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func stateBeforeEvent(ctx context.Context, db storage.Database, eventNID types.EventNID) ([]types.StateEntry, error) {
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roomState := state.NewStateResolution(db)
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events := []types.Event{}
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// Lookup the event NID
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eIDs, err := db.EventIDs(ctx, []types.EventNID{eventNID})
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if err != nil {
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@ -323,11 +322,16 @@ func getMembershipsBeforeEventNID(
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}
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// Fetch the state as it was when this event was fired
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stateEntries, err := roomState.LoadCombinedStateAfterEvents(ctx, prevState)
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if err != nil {
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return nil, err
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return roomState.LoadCombinedStateAfterEvents(ctx, prevState)
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}
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// getMembershipsAtState filters the state events to
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// only keep the "m.room.member" events with a "join" membership. These events are returned.
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// Returns an error if there was an issue fetching the events.
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func getMembershipsAtState(
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ctx context.Context, db storage.Database, stateEntries []types.StateEntry, joinedOnly bool,
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) ([]types.Event, error) {
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var eventNIDs []types.EventNID
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for _, entry := range stateEntries {
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// Filter the events to retrieve to only keep the membership events
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@ -347,6 +351,7 @@ func getMembershipsBeforeEventNID(
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}
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// Filter the events to only keep the "join" membership events
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var events []types.Event
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for _, event := range stateEvents {
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membership, err := event.Membership()
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if err != nil {
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@ -563,20 +568,29 @@ func (r *RoomserverQueryAPI) backfillViaFederation(ctx context.Context, req *api
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if !ok {
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// this should be impossible as all events returned must have pass Step 5 of the PDU checks
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// which requires a list of state IDs.
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logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to find state IDs for event which passed auth checks")
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logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to find state IDs for event which passed auth checks")
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continue
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}
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var entries []types.StateEntry
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if entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs); err != nil {
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// attempt to fetch the missing events
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r.fetchAndStoreMissingEvents(ctx, roomVer, requester, stateIDs)
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// try again
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entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs)
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if err != nil {
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logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to get state entries for event")
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return err
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}
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}
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var beforeStateSnapshotNID types.StateSnapshotNID
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if beforeStateSnapshotNID, err = r.DB.AddState(ctx, roomNID, nil, entries); err != nil {
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logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to persist state entries to get snapshot nid")
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return err
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}
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util.GetLogger(ctx).Infof("Backfilled event %s (nid=%d) getting snapshot %v with entries %+v", ev.EventID(), ev.EventNID, beforeStateSnapshotNID, entries)
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if err = r.DB.SetState(ctx, ev.EventNID, beforeStateSnapshotNID); err != nil {
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logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to set state before event")
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logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to persist snapshot nid")
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}
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}
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@ -608,6 +622,66 @@ func (r *RoomserverQueryAPI) isServerCurrentlyInRoom(ctx context.Context, server
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return auth.IsAnyUserOnServerWithMembership(serverName, gmslEvents, gomatrixserverlib.Join), nil
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}
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// fetchAndStoreMissingEvents does a best-effort fetch and store of missing events specified in stateIDs. Returns no error as it is just
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// best effort.
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func (r *RoomserverQueryAPI) fetchAndStoreMissingEvents(ctx context.Context, roomVer gomatrixserverlib.RoomVersion,
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backfillRequester *backfillRequester, stateIDs []string) {
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servers := backfillRequester.servers
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// work out which are missing
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nidMap, err := r.DB.EventNIDs(ctx, stateIDs)
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if err != nil {
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util.GetLogger(ctx).WithError(err).Warn("cannot query missing events")
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return
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}
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missingMap := make(map[string]*gomatrixserverlib.HeaderedEvent) // id -> event
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for _, id := range stateIDs {
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if _, ok := nidMap[id]; !ok {
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missingMap[id] = nil
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}
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}
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util.GetLogger(ctx).Infof("Fetching %d missing state events (from %d possible servers)", len(missingMap), len(servers))
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// fetch the events from federation. Loop the servers first so if we find one that works we stick with them
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for _, srv := range servers {
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for id, ev := range missingMap {
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if ev != nil {
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continue // already found
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}
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logger := util.GetLogger(ctx).WithField("server", srv).WithField("event_id", id)
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res, err := r.FedClient.GetEvent(ctx, srv, id)
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if err != nil {
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logger.WithError(err).Warn("failed to get event from server")
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continue
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}
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loader := gomatrixserverlib.NewEventsLoader(roomVer, r.KeyRing, backfillRequester, backfillRequester.ProvideEvents, false)
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result, err := loader.LoadAndVerify(ctx, res.PDUs, gomatrixserverlib.TopologicalOrderByPrevEvents)
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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 *RoomserverQueryAPI) scanEventTree(
|
||||
|
|
@ -857,7 +931,7 @@ func persistEvents(ctx context.Context, db storage.Database, events []gomatrixse
|
|||
var stateAtEvent types.StateAtEvent
|
||||
roomNID, stateAtEvent, err = db.StoreEvent(ctx, ev.Unwrap(), nil, authNids)
|
||||
if err != nil {
|
||||
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to store backfilled event")
|
||||
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to persist event")
|
||||
continue
|
||||
}
|
||||
backfilledEventMap[ev.EventID()] = types.Event{
|
||||
|
|
|
|||
|
|
@ -86,7 +86,10 @@ func (v StateResolution) LoadStateAtEvent(
|
|||
) ([]types.StateEntry, error) {
|
||||
snapshotNID, err := v.db.SnapshotNIDFromEventID(ctx, eventID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
return nil, fmt.Errorf("LoadStateAtEvent.SnapshotNIDFromEventID failed for event %s : %s", eventID, err)
|
||||
}
|
||||
if snapshotNID == 0 {
|
||||
return nil, fmt.Errorf("LoadStateAtEvent.SnapshotNIDFromEventID(%s) returned 0 NID, was this event stored?", eventID)
|
||||
}
|
||||
|
||||
stateEntries, err := v.LoadStateAtSnapshot(ctx, snapshotNID)
|
||||
|
|
|
|||
|
|
@ -48,11 +48,6 @@ const insertEventSQL = `
|
|||
ON CONFLICT DO NOTHING;
|
||||
`
|
||||
|
||||
const insertEventResultSQL = `
|
||||
SELECT event_nid, state_snapshot_nid FROM roomserver_events
|
||||
WHERE rowid = last_insert_rowid();
|
||||
`
|
||||
|
||||
const selectEventSQL = "" +
|
||||
"SELECT event_nid, state_snapshot_nid FROM roomserver_events WHERE event_id = $1"
|
||||
|
||||
|
|
@ -102,7 +97,6 @@ const selectRoomNIDForEventNIDSQL = "" +
|
|||
type eventStatements struct {
|
||||
db *sql.DB
|
||||
insertEventStmt *sql.Stmt
|
||||
insertEventResultStmt *sql.Stmt
|
||||
selectEventStmt *sql.Stmt
|
||||
bulkSelectStateEventByIDStmt *sql.Stmt
|
||||
bulkSelectStateAtEventByIDStmt *sql.Stmt
|
||||
|
|
@ -126,7 +120,6 @@ func (s *eventStatements) prepare(db *sql.DB) (err error) {
|
|||
|
||||
return statementList{
|
||||
{&s.insertEventStmt, insertEventSQL},
|
||||
{&s.insertEventResultStmt, insertEventResultSQL},
|
||||
{&s.selectEventStmt, selectEventSQL},
|
||||
{&s.bulkSelectStateEventByIDStmt, bulkSelectStateEventByIDSQL},
|
||||
{&s.bulkSelectStateAtEventByIDStmt, bulkSelectStateAtEventByIDSQL},
|
||||
|
|
@ -152,19 +145,22 @@ func (s *eventStatements) insertEvent(
|
|||
referenceSHA256 []byte,
|
||||
authEventNIDs []types.EventNID,
|
||||
depth int64,
|
||||
) (types.EventNID, types.StateSnapshotNID, error) {
|
||||
var eventNID int64
|
||||
var stateNID int64
|
||||
var err error
|
||||
) (types.EventNID, error) {
|
||||
// attempt to insert: the last_row_id is the event NID
|
||||
insertStmt := common.TxStmt(txn, s.insertEventStmt)
|
||||
resultStmt := common.TxStmt(txn, s.insertEventResultStmt)
|
||||
if _, err = insertStmt.ExecContext(
|
||||
result, err := insertStmt.ExecContext(
|
||||
ctx, int64(roomNID), int64(eventTypeNID), int64(eventStateKeyNID),
|
||||
eventID, referenceSHA256, eventNIDsAsArray(authEventNIDs), depth,
|
||||
); err == nil {
|
||||
err = resultStmt.QueryRowContext(ctx).Scan(&eventNID, &stateNID)
|
||||
)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
return types.EventNID(eventNID), types.StateSnapshotNID(stateNID), err
|
||||
modified, err := result.RowsAffected()
|
||||
if modified == 0 && err == nil {
|
||||
return 0, sql.ErrNoRows
|
||||
}
|
||||
eventNID, err := result.LastInsertId()
|
||||
return types.EventNID(eventNID), err
|
||||
}
|
||||
|
||||
func (s *eventStatements) selectEvent(
|
||||
|
|
|
|||
|
|
@ -124,7 +124,7 @@ func (d *Database) StoreEvent(
|
|||
}
|
||||
}
|
||||
|
||||
if eventNID, stateNID, err = d.statements.insertEvent(
|
||||
if eventNID, err = d.statements.insertEvent(
|
||||
ctx,
|
||||
txn,
|
||||
roomNID,
|
||||
|
|
|
|||
Loading…
Reference in a new issue