diff src/doveadm/dsync/dsync-mailbox.h @ 22715:20415dd0b85a

dsync: Add per-mailbox sync lock that is always used. Both importing and exporting gets the lock before they even sync the mailbox. The lock is kept until the import/export finishes. This guarantees that no matter how dsync is run, two dsyncs can't be working on the same mailbox at the same time. This lock is in addition to the optional per-user lock enabled by the -l parameter. If the -l parameter is used, the same lock timeout is used for the per-mailbox lock. Otherwise 30s timeout is used. This should help to avoid email duplication when replication is enabled for public namespaces, and maybe in some other rare situations as well.
author Timo Sirainen <timo.sirainen@dovecot.fi>
date Thu, 28 Dec 2017 14:10:23 +0200
parents 1f8b784712e1
line wrap: on
line diff
--- a/src/doveadm/dsync/dsync-mailbox.h	Thu Dec 28 19:40:29 2017 +0200
+++ b/src/doveadm/dsync/dsync-mailbox.h	Thu Dec 28 14:10:23 2017 +0200
@@ -3,6 +3,8 @@
 #include "mail-storage.h"
+struct dsync_brain;
 /* Mailbox that is going to be synced. Its name was already sent in the
    mailbox tree. */
 struct dsync_mailbox {
@@ -36,4 +38,7 @@
 				 const struct dsync_mailbox_attribute *src,
 				 struct dsync_mailbox_attribute *dest_r);
+int dsync_mailbox_lock(struct dsync_brain *brain, struct mailbox *box,
+		       struct file_lock **lock_r);