From 86cc92be7b84f4583bf9ed616848ef178f73d475 Mon Sep 17 00:00:00 2001
From: Rich Megginson <rmeggins@redhat.com>
Date: Wed, 25 Sep 2013 08:51:12 -0600
Subject: [PATCH 10/28] Ticket #47504 idlistscanlimit per index/type/value

https://fedorahosted.org/389/ticket/47504
Reviewed by: nhosoi (Thanks!)
Branch: rhel-7.0
Fix Description: This patch broke replication.  The problem is that we cannot
compare the allidslimit to 0 unless the value is explicitly set by
index_get_allids.  The fix is to only return ALLIDS if the allidslimit was
explicitly set to 0 by index_get_allids.
Platforms tested: RHEL6 x86_64
Flag Day: no
Doc impact: no
(cherry picked from commit 058d01d7479204a2507dab822cd81e32c37be862)
(cherry picked from commit e5405e627439ccaf370d90c42e65c0a987e33e73)
---
 ldap/servers/slapd/back-ldbm/index.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/ldap/servers/slapd/back-ldbm/index.c b/ldap/servers/slapd/back-ldbm/index.c
index d5ca16a..f4de2fa 100644
--- a/ldap/servers/slapd/back-ldbm/index.c
+++ b/ldap/servers/slapd/back-ldbm/index.c
@@ -52,7 +52,7 @@
 static const char *errmsg = "database index operation failed";
 
 static int   is_indexed (const char* indextype, int indexmask, char** index_rules);
-static int index_get_allids( int default_allids, const char *indextype, struct attrinfo *ai, const struct berval *val, unsigned int flags );
+static int index_get_allids( int *allids, const char *indextype, struct attrinfo *ai, const struct berval *val, unsigned int flags );
 
 static Slapi_Value **
 valuearray_minus_valuearray(
@@ -985,8 +985,11 @@ index_read_ext_allids(
 		slapi_pblock_get(pb, SLAPI_SEARCH_IS_AND, &is_and);
 	}
 	ai_flags = is_and ? INDEX_ALLIDS_FLAG_AND : 0;
-	allidslimit = index_get_allids( allidslimit, indextype, ai, val, ai_flags );
-	if (allidslimit == 0) {
+	/* the caller can pass in a value of 0 - just ignore those - but if the index
+	 * config sets the allidslimit to 0, this means to skip the index
+	 */
+	if (index_get_allids( &allidslimit, indextype, ai, val, ai_flags ) &&
+	    (allidslimit == 0)) {
 		idl = idl_allids( be );
 		if (unindexed != NULL) *unindexed = 1;
 		LDAPDebug1Arg( LDAP_DEBUG_BACKLDBM, "<= index_read %lu candidates "
@@ -2400,9 +2403,9 @@ valuearray_minus_valuearray(
 #define AI_HAS_TYPE 0x02
 #define AI_HAS_FLAG 0x01
 static int
-index_get_allids( int default_allids, const char *indextype, struct attrinfo *ai, const struct berval *val, unsigned int flags )
+index_get_allids( int *allids, const char *indextype, struct attrinfo *ai, const struct berval *val, unsigned int flags )
 {
-    int allids = default_allids;
+    int found = 0;
     Slapi_Value sval;
     struct index_idlistsizeinfo *iter; /* iterator */
     int cookie = 0;
@@ -2410,7 +2413,7 @@ index_get_allids( int default_allids, const char *indextype, struct attrinfo *ai
     struct index_idlistsizeinfo *best_match = NULL;
 
     if (!ai->ai_idlistinfo) {
-        return allids;
+        return found;
     }
 
     if (val) { /* val should already be a Slapi_Value, but some paths do not use Slapi_Value */
@@ -2454,9 +2457,10 @@ index_get_allids( int default_allids, const char *indextype, struct attrinfo *ai
     }
 
     if (best_match) {
-        allids = best_match->ai_idlistsizelimit;
+        *allids = best_match->ai_idlistsizelimit;
+        found = 1; /* found a match */
     }
 
-    return allids;
+    return found;
 }
 
-- 
1.7.1