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State handling tweaks (#2652)

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This tweaks how rejected events are handled in room state and also to not apply checks we can't complete to outliers.
This commit is contained in:
Neil Alexander 2022-08-18 17:06:13 +01:00 committed by GitHub
parent 606cb67506
commit 6b48ce0d75
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 92 additions and 53 deletions
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4
roomserver/internal/helpers/auth.go
View file

@ -39,7 +39,7 @@ func CheckForSoftFail(
var authStateEntries []types.StateEntry
var err error
if rewritesState {
authStateEntries, err = db.StateEntriesForEventIDs(ctx, stateEventIDs)
authStateEntries, err = db.StateEntriesForEventIDs(ctx, stateEventIDs, true)
if err != nil {
return true, fmt.Errorf("StateEntriesForEventIDs failed: %w", err)
}
@ -97,7 +97,7 @@ func CheckAuthEvents(
authEventIDs []string,
) ([]types.EventNID, error) {
// Grab the numeric IDs for the supplied auth state events from the database.
authStateEntries, err := db.StateEntriesForEventIDs(ctx, authEventIDs)
authStateEntries, err := db.StateEntriesForEventIDs(ctx, authEventIDs, true)
if err != nil {
return nil, fmt.Errorf("db.StateEntriesForEventIDs: %w", err)
}

6
roomserver/internal/input/input_events.go
View file

@ -301,7 +301,7 @@ func (r *Inputer) processRoomEvent(
// bother doing this if the event was already rejected as it just ends up
// burning CPU time.
historyVisibility := gomatrixserverlib.HistoryVisibilityShared // Default to shared.
if rejectionErr == nil && !isRejected && !softfail {
if input.Kind != api.KindOutlier && rejectionErr == nil && !isRejected && !softfail {
var err error
historyVisibility, rejectionErr, err = r.processStateBefore(ctx, input, missingPrev)
if err != nil {
@ -356,6 +356,8 @@ func (r *Inputer) processRoomEvent(
// We stop here if the event is rejected: We've stored it but won't update forward extremities or notify anyone about it.
if isRejected || softfail {
logger.WithError(rejectionErr).WithFields(logrus.Fields{
"room_id": event.RoomID(),
"event_id": event.EventID(),
"soft_fail": softfail,
"missing_prev": missingPrev,
}).Warn("Stored rejected event")
@ -661,7 +663,7 @@ func (r *Inputer) calculateAndSetState(
// We've been told what the state at the event is so we don't need to calculate it.
// Check that those state events are in the database and store the state.
var entries []types.StateEntry
if entries, err = r.DB.StateEntriesForEventIDs(ctx, input.StateEventIDs); err != nil {
if entries, err = r.DB.StateEntriesForEventIDs(ctx, input.StateEventIDs, true); err != nil {
return fmt.Errorf("updater.StateEntriesForEventIDs: %w", err)
}
entries = types.DeduplicateStateEntries(entries)

4
roomserver/internal/perform/perform_backfill.go
View file

@ -140,11 +140,11 @@ func (r *Backfiller) backfillViaFederation(ctx context.Context, req *api.Perform
continue
}
var entries []types.StateEntry
if entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs); err != nil {
if entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs, true); err != nil {
// attempt to fetch the missing events
r.fetchAndStoreMissingEvents(ctx, info.RoomVersion, requester, stateIDs)
// try again
entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs)
entries, err = r.DB.StateEntriesForEventIDs(ctx, stateIDs, true)
if err != nil {
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("backfillViaFederation: failed to get state entries for event")
return err

2
roomserver/storage/interface.go
View file

@ -79,7 +79,7 @@ type Database interface {
// Look up the state entries for a list of string event IDs
// Returns an error if the there is an error talking to the database
// Returns a types.MissingEventError if the event IDs aren't in the database.
StateEntriesForEventIDs(ctx context.Context, eventIDs []string) ([]types.StateEntry, error)
StateEntriesForEventIDs(ctx context.Context, eventIDs []string, excludeRejected bool) ([]types.StateEntry, error)
// Look up the string event state keys for a list of numeric event state keys
// Returns an error if there was a problem talking to the database.
EventStateKeys(ctx context.Context, eventStateKeyNIDs []types.EventStateKeyNID) (map[types.EventStateKeyNID]string, error)

30
roomserver/storage/postgres/events_table.go
View file

@ -88,6 +88,14 @@ const bulkSelectStateEventByIDSQL = "" +
" WHERE event_id = ANY($1)" +
" ORDER BY event_type_nid, event_state_key_nid ASC"
// Bulk lookup of events by string ID that aren't excluded.
// Sort by the numeric IDs for event type and state key.
// This means we can use binary search to lookup entries by type and state key.
const bulkSelectStateEventByIDExcludingRejectedSQL = "" +
"SELECT event_type_nid, event_state_key_nid, event_nid FROM roomserver_events" +
" WHERE event_id = ANY($1) AND is_rejected = FALSE" +
" ORDER BY event_type_nid, event_state_key_nid ASC"
// Bulk look up of events by event NID, optionally filtering by the event type
// or event state key NIDs if provided. (The CARDINALITY check will return true
// if the provided arrays are empty, ergo no filtering).
@ -143,6 +151,7 @@ type eventStatements struct {
insertEventStmt *sql.Stmt
selectEventStmt *sql.Stmt
bulkSelectStateEventByIDStmt *sql.Stmt
bulkSelectStateEventByIDExcludingRejectedStmt *sql.Stmt
bulkSelectStateEventByNIDStmt *sql.Stmt
bulkSelectStateAtEventByIDStmt *sql.Stmt
updateEventStateStmt *sql.Stmt
@ -171,6 +180,7 @@ func PrepareEventsTable(db *sql.DB) (tables.Events, error) {
{&s.insertEventStmt, insertEventSQL},
{&s.selectEventStmt, selectEventSQL},
{&s.bulkSelectStateEventByIDStmt, bulkSelectStateEventByIDSQL},
{&s.bulkSelectStateEventByIDExcludingRejectedStmt, bulkSelectStateEventByIDExcludingRejectedSQL},
{&s.bulkSelectStateEventByNIDStmt, bulkSelectStateEventByNIDSQL},
{&s.bulkSelectStateAtEventByIDStmt, bulkSelectStateAtEventByIDSQL},
{&s.updateEventStateStmt, updateEventStateSQL},
@ -221,11 +231,18 @@ func (s *eventStatements) SelectEvent(
}
// bulkSelectStateEventByID lookups a list of state events by event ID.
// If any of the requested events are missing from the database it returns a types.MissingEventError
// If not excluding rejected events, and any of the requested events are missing from
// the database it returns a types.MissingEventError. If excluding rejected events,
// the events will be silently omitted without error.
func (s *eventStatements) BulkSelectStateEventByID(
ctx context.Context, txn *sql.Tx, eventIDs []string,
ctx context.Context, txn *sql.Tx, eventIDs []string, excludeRejected bool,
) ([]types.StateEntry, error) {
stmt := sqlutil.TxStmt(txn, s.bulkSelectStateEventByIDStmt)
var stmt *sql.Stmt
if excludeRejected {
stmt = sqlutil.TxStmt(txn, s.bulkSelectStateEventByIDExcludingRejectedStmt)
} else {
stmt = sqlutil.TxStmt(txn, s.bulkSelectStateEventByIDStmt)
}
rows, err := stmt.QueryContext(ctx, pq.StringArray(eventIDs))
if err != nil {
return nil, err
@ -235,10 +252,10 @@ func (s *eventStatements) BulkSelectStateEventByID(
// because of the unique constraint on event IDs.
// So we can allocate an array of the correct size now.
// We might get fewer results than IDs so we adjust the length of the slice before returning it.
results := make([]types.StateEntry, len(eventIDs))
results := make([]types.StateEntry, 0, len(eventIDs))
i := 0
for ; rows.Next(); i++ {
result := &results[i]
var result types.StateEntry
if err = rows.Scan(
&result.EventTypeNID,
&result.EventStateKeyNID,
@ -246,11 +263,12 @@ func (s *eventStatements) BulkSelectStateEventByID(
); err != nil {
return nil, err
}
results = append(results, result)
}
if err = rows.Err(); err != nil {
return nil, err
}
if i != len(eventIDs) {
if !excludeRejected && i != len(eventIDs) {
// If there are fewer rows returned than IDs then we were asked to lookup event IDs we don't have.
// We don't know which ones were missing because we don't return the string IDs in the query.
// However it should be possible debug this by replaying queries or entries from the input kafka logs.

4
roomserver/storage/shared/storage.go
View file

@ -113,9 +113,9 @@ func (d *Database) eventStateKeyNIDs(
}
func (d *Database) StateEntriesForEventIDs(
ctx context.Context, eventIDs []string,
ctx context.Context, eventIDs []string, excludeRejected bool,
) ([]types.StateEntry, error) {
return d.EventsTable.BulkSelectStateEventByID(ctx, nil, eventIDs)
return d.EventsTable.BulkSelectStateEventByID(ctx, nil, eventIDs, excludeRejected)
}
func (d *Database) StateEntriesForTuples(

31
roomserver/storage/sqlite3/events_table.go
View file

@ -65,6 +65,14 @@ const bulkSelectStateEventByIDSQL = "" +
" WHERE event_id IN ($1)" +
" ORDER BY event_type_nid, event_state_key_nid ASC"
// Bulk lookup of events by string ID that aren't rejected.
// Sort by the numeric IDs for event type and state key.
// This means we can use binary search to lookup entries by type and state key.
const bulkSelectStateEventByIDExcludingRejectedSQL = "" +
"SELECT event_type_nid, event_state_key_nid, event_nid FROM roomserver_events" +
" WHERE event_id IN ($1) AND is_rejected = 0" +
" ORDER BY event_type_nid, event_state_key_nid ASC"
const bulkSelectStateEventByNIDSQL = "" +
"SELECT event_type_nid, event_state_key_nid, event_nid FROM roomserver_events" +
" WHERE event_nid IN ($1)"
@ -117,6 +125,7 @@ type eventStatements struct {
insertEventStmt *sql.Stmt
selectEventStmt *sql.Stmt
bulkSelectStateEventByIDStmt *sql.Stmt
bulkSelectStateEventByIDExcludingRejectedStmt *sql.Stmt
bulkSelectStateAtEventByIDStmt *sql.Stmt
updateEventStateStmt *sql.Stmt
selectEventSentToOutputStmt *sql.Stmt
@ -145,6 +154,7 @@ func PrepareEventsTable(db *sql.DB) (tables.Events, error) {
{&s.insertEventStmt, insertEventSQL},
{&s.selectEventStmt, selectEventSQL},
{&s.bulkSelectStateEventByIDStmt, bulkSelectStateEventByIDSQL},
{&s.bulkSelectStateEventByIDExcludingRejectedStmt, bulkSelectStateEventByIDExcludingRejectedSQL},
{&s.bulkSelectStateAtEventByIDStmt, bulkSelectStateAtEventByIDSQL},
{&s.updateEventStateStmt, updateEventStateSQL},
{&s.updateEventSentToOutputStmt, updateEventSentToOutputSQL},
@ -194,16 +204,24 @@ func (s *eventStatements) SelectEvent(
}
// bulkSelectStateEventByID lookups a list of state events by event ID.
// If any of the requested events are missing from the database it returns a types.MissingEventError
// If not excluding rejected events, and any of the requested events are missing from
// the database it returns a types.MissingEventError. If excluding rejected events,
// the events will be silently omitted without error.
func (s *eventStatements) BulkSelectStateEventByID(
ctx context.Context, txn *sql.Tx, eventIDs []string,
ctx context.Context, txn *sql.Tx, eventIDs []string, excludeRejected bool,
) ([]types.StateEntry, error) {
///////////////
var sql string
if excludeRejected {
sql = bulkSelectStateEventByIDExcludingRejectedSQL
} else {
sql = bulkSelectStateEventByIDSQL
}
iEventIDs := make([]interface{}, len(eventIDs))
for k, v := range eventIDs {
iEventIDs[k] = v
}
selectOrig := strings.Replace(bulkSelectStateEventByIDSQL, "($1)", sqlutil.QueryVariadic(len(iEventIDs)), 1)
selectOrig := strings.Replace(sql, "($1)", sqlutil.QueryVariadic(len(iEventIDs)), 1)
selectPrep, err := s.db.Prepare(selectOrig)
if err != nil {
return nil, err
@ -221,10 +239,10 @@ func (s *eventStatements) BulkSelectStateEventByID(
// because of the unique constraint on event IDs.
// So we can allocate an array of the correct size now.
// We might get fewer results than IDs so we adjust the length of the slice before returning it.
results := make([]types.StateEntry, len(eventIDs))
results := make([]types.StateEntry, 0, len(eventIDs))
i := 0
for ; rows.Next(); i++ {
result := &results[i]
var result types.StateEntry
if err = rows.Scan(
&result.EventTypeNID,
&result.EventStateKeyNID,
@ -232,8 +250,9 @@ func (s *eventStatements) BulkSelectStateEventByID(
); err != nil {
return nil, err
}
results = append(results, result)
}
if i != len(eventIDs) {
if !excludeRejected && i != len(eventIDs) {
// If there are fewer rows returned than IDs then we were asked to lookup event IDs we don't have.
// We don't know which ones were missing because we don't return the string IDs in the query.
// However it should be possible debug this by replaying queries or entries from the input kafka logs.

2
roomserver/storage/tables/events_table_test.go
View file

@ -102,7 +102,7 @@ func Test_EventsTable(t *testing.T) {
})
}
stateEvents, err := tab.BulkSelectStateEventByID(ctx, nil, eventIDs)
stateEvents, err := tab.BulkSelectStateEventByID(ctx, nil, eventIDs, false)
assert.NoError(t, err)
assert.Equal(t, len(stateEvents), len(eventIDs))
nids := make([]types.EventNID, 0, len(stateEvents))

2
roomserver/storage/tables/interface.go
View file

@ -46,7 +46,7 @@ type Events interface {
SelectEvent(ctx context.Context, txn *sql.Tx, eventID string) (types.EventNID, types.StateSnapshotNID, error)
// bulkSelectStateEventByID lookups a list of state events by event ID.
// If any of the requested events are missing from the database it returns a types.MissingEventError
BulkSelectStateEventByID(ctx context.Context, txn *sql.Tx, eventIDs []string) ([]types.StateEntry, error)
BulkSelectStateEventByID(ctx context.Context, txn *sql.Tx, eventIDs []string, excludeRejected bool) ([]types.StateEntry, error)
BulkSelectStateEventByNID(ctx context.Context, txn *sql.Tx, eventNIDs []types.EventNID, stateKeyTuples []types.StateKeyTuple) ([]types.StateEntry, error)
// BulkSelectStateAtEventByID lookups the state at a list of events by event ID.
// If any of the requested events are missing from the database it returns a types.MissingEventError.