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historysync: lock earlier to prevent races and duplicate messages

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Closes BRI-2709
This commit is contained in:
Sumner Evans 2022-04-04 16:07:25 -06:00
parent 54534f6b42
commit 748c9509a1
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GPG key ID: 8904527AB50022FD
1 changed files with 59 additions and 55 deletions
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16
historysync.go
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@ -100,8 +100,16 @@ func (user *User) handleBackfillRequestsLoop(backfillRequests chan *database.Bac
portal.Update()
}
user.createOrUpdatePortalAndBackfillWithLock(req, conv, portal)
}
}
func (user *User) createOrUpdatePortalAndBackfillWithLock(req *database.Backfill, conv *database.HistorySyncConversation, portal *Portal) {
portal.backfillLock.Lock()
defer portal.backfillLock.Unlock()
if !user.shouldCreatePortalForHistorySync(conv, portal) {
continue
return
}
if len(portal.MXID) == 0 {
@ -109,7 +117,7 @@ func (user *User) handleBackfillRequestsLoop(backfillRequests chan *database.Bac
err := portal.CreateMatrixRoom(user, nil, true, false)
if err != nil {
user.log.Warnfln("Failed to create room for %s during backfill: %v", portal.Key.JID, err)
continue
return
}
} else {
portal.UpdateMatrixRoom(user, nil)
@ -158,7 +166,6 @@ func (user *User) handleBackfillRequestsLoop(backfillRequests chan *database.Bac
if !conv.MarkedAsUnread && conv.UnreadCount == 0 {
user.markSelfReadFull(portal)
}
}
}
func (user *User) shouldCreatePortalForHistorySync(conv *database.HistorySyncConversation, portal *Portal) bool {
@ -298,9 +305,6 @@ var (
)
func (portal *Portal) backfill(source *User, messages []*database.WrappedWebMessageInfo) []id.EventID {
portal.backfillLock.Lock()
defer portal.backfillLock.Unlock()
var historyBatch, newBatch mautrix.ReqBatchSend
var historyBatchInfos, newBatchInfos []*wrappedInfo