Updated copyright notices to include the year 2018.

director: Use *_host.ip_str to avoid net_ip2addr() calls

director: Add mail_host.ip_str This avoids having to use net_ip2addr() all the time to convert it into a string.

director: Make director_consistent_hashing=yes mandatory

director: Fix mail_hosts_dup() to duplicate tags correctly. The host->tag pointed to the old hosts list. Also the new hosts list's tags array wasn't filled. This fixes USER-LOOKUP to return host with default configuration, which fixes doveadm director status <user> to not show "Initial config" as empty.

director: Log vhost count changes and HOST-UP/DOWN

Updated copyright notices to include the year 2017.

director: Don't access freed memory during deinit

director: Keep per-tag directory

director: const mail_host in mail_host_get_tag

Require IPv6 to build

global: freshen copyright git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-5]/$1-2016/g;s/ (201[0-5]) Dovecot/ $1-2016 Dovecot/'

director: Minor code cleanup - removed unnecessary code.

director: Include tag also in the hosts_hash.

director: Fixed recent tag reimplementation to actually work. We still just created one large vhosts pool for all tags containing all the hosts.

director: Don't treat empty hostname the same as having it. This could have caused "host not given" errors if an empty "host=" was sent to login process, even though hostip was also sent. Fixed this in two places, although either one should have been enough.

director: Fixed backend selection when multiple tags were used. The previous algorithm was causing an uneven load for backends. This change breaks compatibility with older director servers that were using tags because of the different selection algorithm. The new director code refuses to run within a cluster with old directors if tags are used.

director: Code cleanup - renamed hosts_unsorted to vhosts_unsorted

director: Code cleanup - rename tag to tag_name in mail_host_*() parameters. In preparation for the following changes.

director: Code cleanup - access host->tag via mail_host_get_tag() In preparation for the following changes.

director: Code cleanup - make most mail_host_*() list parameters unnecessary.

director: With director_consistent_hashing=yes hosts_hash wasn't always calculated right. If different servers had added hosts in different order, the hosts_hash would have become different, which caused errors and resyncs.

director: Fix to previous change - mail_host_dup() wasn't strdup()ing hostname. This could have caused a crash at deinit.

director: Remember backends' hostnames and send them in login reply. This allows login processes to verify the remote server's hostname in SSL certificate.

director: Added mail_hosts_hash(), which identifies the current mail_hosts configuration.

director: Don't become desynced if two directors change the same backend in incompatible ways. This would have caused "User hash .. is being redirected to two hosts" errors, which wouldn't easily go away as the directors have a different view of what hosts currently exist.

director: Added "up" vs "down" states and doveadm director up/down commands. These commands are intended to be used by automated watchdogs that detect if backends are up or down. This way the vhost count doesn't get forgotten after server goes down. It also means that admin can manually take down a server by setting its vhost count to 0 without the watchdog automatically bringing it back up.

global: freshen copyright Robomatically: git ls-files | xargs perl -p -i -e 's/(\d+)-201[0-4]/$1-2015/g;s/ (201[0-4]) Dovecot/ $1-2015 Dovecot/' Happy 2015 everyone! Signed-off-by: Phil Carmody <phil@dovecot.fi>

director: Added support for backend cluster "tags". This allows using a single director ring for multiple backend clusters. By default everything has an empty tag. A passdb lookup can return "director_tag" field containing the wanted tag name. If there aren't any backend servers with the wanted tag, it's treated the same as if there aren't any backend servers available (= wait for 30 secs for a backend and then return temporary failure). Tags can be added to configuration by adding @tag suffix to IPs/hosts. For example: director_mail_servers = 10.0.0.100-10.0.0.110@name1 10.0.0.120@name2 "doveadm director add" can also add tags either with @tag suffix or with -t parameter. "doveadm director status user@domain" requires giving the user's correct tag with -t parameter or the results won't be correct (empty tag's results are shown). Tags can't currently be changed for an existing host without removing it first.

director: Added director_consistent_hashing setting. This should have been the default since the beginning. I didn't thik it was worth the trouble originally because in theory it shouldn't matter much if users jump between multiple backends. But this makes caching behavior worse, especially for systems which are using local cache files.

Updated copyright notices to include year 2014.

Oops :) Update copyrights to 2013 without breaking all .c files.

Updated copyright notices to include year 2013.

Array API changed: ARRAY_DEFINE(name, type) -> ARRAY(type) name Easy way to update your existing code: perl -i -pe 's:ARRAY_DEFINE\(([^,]+), *([^)]+)\);:ARRAY($2) $1;:' **/*.[ch]

Make sure we check all the functions' return values. Minor API changes to simplify this. Checked using a patched clang that adds attribute(warn_unused_result) to all functions. This commit fixes several error handling mistakes.