Rewrite entire queue code.

Major goals:

1) Fix bad performance caused by the runner process doing full queue
read in 1s intervals.  My Soekris can now happily accept >50 msg/s
while having multi-thousand queue; before, one hundred queue would
bring the system to its knees.

2) Introduce Qmail-like scheduler that doesn't write as much to the
disk so that it needs less code for servicing error conditions,
which in some places can be tricky to get right.

3) Introduce separation between the scheduler and the backend; these
two queue aspects shouldn't be too tied too each other.  This means
that eg. storing queue in SQL requires rewrite of just queue_backend.c.

4) Make on-disk queue format architecture independent, and more
easily extensible, to reduce number of flag days in the future.

Minor goals:

ENOSPC no longer prevents delivery attempts, fixed session limiting
for relayed mail, improved batching of "relay via" mails, human-readable
mailq output, "show queue raw" command, clearer logging, sending
of single bounce about multiple recipients, exact delay= computation,
zero delay between deliveries while within session limit (currently
1s delay between re-scheduling is enforced), mta no longer requests
content fd, corrected session limit for bounce submissions, tiny
<100B queue files instead of multi-KB, detect loops before accepting
mail, reduce traffic on imsg channels by killing enormous struct
submit_status.

1 files changed, 5 insertions, 12 deletions

diff --git a/usr.sbin/smtpd/aliases.c b/usr.sbin/smtpd/aliases.c
index 9d7dcb44e49..25c232fb264 100644
--- a/usr.sbin/smtpd/aliases.c
+++ b/usr.sbin/smtpd/aliases.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: aliases.c,v 1.33 2010/05/19 20:57:10 gilles Exp $	*/
+/*	$OpenBSD: aliases.c,v 1.34 2010/05/31 23:38:56 jacekm Exp $	*/
 
 /*
  * Copyright (c) 2008 Gilles Chehade <gilles@openbsd.org>
@@ -67,20 +67,13 @@ aliases_exist(struct smtpd *env, objid_t mapid, char *username)
 }
 
 int
-aliases_get(struct smtpd *env, objid_t mapid, struct expandtree *expandtree, char *username)
+aliases_get(struct smtpd *env, objid_t mapid, struct expandtree *tree, char *username)
 {
-	struct map *map;
 	struct map_alias *map_alias;
 	struct expandnode *expnode;
-	char buf[MAXLOGNAME];
 	size_t nbaliases;
 
-	map = map_find(env, mapid);
-	if (map == NULL)
-		return 0;
-
-	lowercase(buf, username, sizeof(buf));
-	map_alias = map_lookup(env, mapid, buf, K_ALIAS);
+	map_alias = map_lookup(env, mapid, username, K_ALIAS);
 	if (map_alias == NULL)
 		return 0;
 
@@ -88,9 +81,9 @@ aliases_get(struct smtpd *env, objid_t mapid, struct expandtree *expandtree, cha
 	nbaliases = 0;
 	RB_FOREACH(expnode, expandtree, &map_alias->expandtree) {
 		if (expnode->type == EXPAND_INCLUDE)
-			nbaliases += aliases_expand_include(expandtree, expnode->u.filename);
+			nbaliases += aliases_expand_include(tree, expnode->u.filename);
 		else {
-			expandtree_increment_node(expandtree, expnode);
+			expandtree_increment_node(tree, expnode);
 			nbaliases++;
 		}
 	}