]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/back-meta/map.c
Merge remote branch 'origin/mdb.master'
[openldap] / servers / slapd / back-meta / map.c
index 29a1ade97f8a47e41cc0c2379ff9755622258ada..7bb172469b7362a308d468688d1351765d9887d3 100644 (file)
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 1998-2005 The OpenLDAP Foundation.
+ * Copyright 1998-2011 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
 #include <ac/socket.h>
 
 #include "slap.h"
+#include "lutil.h"
 #include "../back-ldap/back-ldap.h"
 #include "back-meta.h"
 
-#undef ldap_debug      /* silence a warning in ldap-int.h */
-#include "../../../libraries/libldap/ldap-int.h"
-
 int
 mapping_cmp ( const void *c1, const void *c2 )
 {
@@ -87,22 +85,22 @@ ldap_back_map_init ( struct ldapmap *lm, struct ldapmapping **m )
 {
        struct ldapmapping *mapping;
 
-       assert( m );
+       assert( m != NULL );
 
        *m = NULL;
-       
+
        mapping = (struct ldapmapping *)ch_calloc( 2, 
                        sizeof( struct ldapmapping ) );
        if ( mapping == NULL ) {
                return;
        }
 
-       ber_str2bv( "objectclass", sizeof("objectclass")-1, 1, &mapping->src);
-       ber_dupbv( &mapping->dst, &mapping->src );
-       mapping[1].src = mapping->src;
-       mapping[1].dst = mapping->dst;
+       ber_str2bv( "objectclass", STRLENOF("objectclass"), 1, &mapping[0].src);
+       ber_dupbv( &mapping[0].dst, &mapping[0].src );
+       mapping[1].src = mapping[0].src;
+       mapping[1].dst = mapping[0].dst;
 
-       avl_insert( &lm->map, (caddr_t)mapping
+       avl_insert( &lm->map, (caddr_t)&mapping[0]
                        mapping_cmp, mapping_dup );
        avl_insert( &lm->remap, (caddr_t)&mapping[1], 
                        mapping_cmp, mapping_dup );
@@ -116,10 +114,20 @@ ldap_back_mapping ( struct ldapmap *map, struct berval *s, struct ldapmapping **
        Avlnode *tree;
        struct ldapmapping fmapping;
 
-       assert( m );
+       assert( m != NULL );
+
+       /* let special attrnames slip through (ITS#5760) */
+       if ( bvmatch( s, slap_bv_no_attrs )
+               || bvmatch( s, slap_bv_all_user_attrs )
+               || bvmatch( s, slap_bv_all_operational_attrs ) )
+       {
+               *m = NULL;
+               return 0;
+       }
 
        if ( remap == BACKLDAP_REMAP ) {
                tree = map->remap;
+
        } else {
                tree = map->map;
        }
@@ -138,9 +146,17 @@ ldap_back_map ( struct ldapmap *map, struct berval *s, struct berval *bv,
        int remap )
 {
        struct ldapmapping *mapping;
+       int drop_missing;
+
+       /* map->map may be NULL when mapping is configured,
+        * but map->remap can't */
+       if ( map->remap == NULL ) {
+               *bv = *s;
+               return;
+       }
 
        BER_BVZERO( bv );
-       ( void )ldap_back_mapping( map, s, &mapping, remap );
+       drop_missing = ldap_back_mapping( map, s, &mapping, remap );
        if ( mapping != NULL ) {
                if ( !BER_BVISNULL( &mapping->dst ) ) {
                        *bv = mapping->dst;
@@ -148,66 +164,99 @@ ldap_back_map ( struct ldapmap *map, struct berval *s, struct berval *bv,
                return;
        }
 
-       if ( !map->drop_missing ) {
+       if ( !drop_missing ) {
                *bv = *s;
        }
 }
 
 int
 ldap_back_map_attrs(
+               Operation *op,
                struct ldapmap *at_map,
                AttributeName *an,
                int remap,
-               char ***mapped_attrs
-)
+               char ***mapped_attrs )
 {
-       int i, j;
+       int i, x, j;
        char **na;
        struct berval mapped;
 
-       if ( an == NULL ) {
+       if ( an == NULL && op->o_bd->be_extra_anlist == NULL ) {
                *mapped_attrs = NULL;
                return LDAP_SUCCESS;
        }
 
-       for ( i = 0; !BER_BVISNULL( &an[i].an_name ); i++ )
-               /*  */ ;
+       i = 0;
+       if ( an != NULL ) {
+               for ( ; !BER_BVISNULL( &an[i].an_name ); i++ )
+                       /*  */ ;
+       }
 
-       na = (char **)ch_calloc( i + 1, sizeof(char *) );
+       x = 0;
+       if ( op->o_bd->be_extra_anlist != NULL ) {
+               for ( ; !BER_BVISNULL( &op->o_bd->be_extra_anlist[x].an_name ); x++ )
+                       /*  */ ;
+       }
+
+       assert( i > 0 || x > 0 );
+       
+       na = (char **)ber_memcalloc_x( i + x + 1, sizeof(char *), op->o_tmpmemctx );
        if ( na == NULL ) {
                *mapped_attrs = NULL;
                return LDAP_NO_MEMORY;
        }
 
-       for ( i = j = 0; !BER_BVISNULL( &an[i].an_name ); i++ ) {
-               ldap_back_map( at_map, &an[i].an_name, &mapped, remap );
-               if ( !BER_BVISNULL( &mapped ) && !BER_BVISEMPTY( &mapped ) ) {
-                       na[j++] = mapped.bv_val;
+       j = 0;
+       if ( i > 0 ) {
+               for ( i = 0; !BER_BVISNULL( &an[i].an_name ); i++ ) {
+                       ldap_back_map( at_map, &an[i].an_name, &mapped, remap );
+                       if ( !BER_BVISNULL( &mapped ) && !BER_BVISEMPTY( &mapped ) ) {
+                               na[j++] = mapped.bv_val;
+                       }
+               }
+       }
+
+       if ( x > 0 ) {
+               for ( x = 0; !BER_BVISNULL( &op->o_bd->be_extra_anlist[x].an_name ); x++ ) {
+                       if ( op->o_bd->be_extra_anlist[x].an_desc &&
+                               ad_inlist( op->o_bd->be_extra_anlist[x].an_desc, an ) )
+                       {
+                               continue;
+                       }
+
+                       ldap_back_map( at_map, &op->o_bd->be_extra_anlist[x].an_name, &mapped, remap );
+                       if ( !BER_BVISNULL( &mapped ) && !BER_BVISEMPTY( &mapped ) ) {
+                               na[j++] = mapped.bv_val;
+                       }
                }
        }
-       if ( j == 0 && i != 0 ) {
+
+       if ( j == 0 && ( i > 0 || x > 0 ) ) {
                na[j++] = LDAP_NO_ATTRS;
        }
        na[j] = NULL;
 
        *mapped_attrs = na;
+
        return LDAP_SUCCESS;
 }
 
-int
+static int
 map_attr_value(
                dncookie                *dc,
                AttributeDescription    *ad,
                struct berval           *mapped_attr,
                struct berval           *value,
                struct berval           *mapped_value,
-               int                     remap )
+               int                     remap,
+               void                    *memctx )
 {
        struct berval           vtmp;
        int                     freeval = 0;
 
        ldap_back_map( &dc->target->mt_rwmap.rwm_at, &ad->ad_cname, mapped_attr, remap );
        if ( BER_BVISNULL( mapped_attr ) || BER_BVISEMPTY( mapped_attr ) ) {
+#if 0
                /*
                 * FIXME: are we sure we need to search oc_map if at_map fails?
                 */
@@ -215,6 +264,12 @@ map_attr_value(
                if ( BER_BVISNULL( mapped_attr ) || BER_BVISEMPTY( mapped_attr ) ) {
                        *mapped_attr = ad->ad_cname;
                }
+#endif
+               if ( dc->target->mt_rwmap.rwm_at.drop_missing ) {
+                       return -1;
+               }
+
+               *mapped_attr = ad->ad_cname;
        }
 
        if ( value == NULL ) {
@@ -243,6 +298,17 @@ map_attr_value(
                        return -1;
                }
 
+       } else if ( ad->ad_type->sat_equality && 
+               ad->ad_type->sat_equality->smr_usage & SLAP_MR_MUTATION_NORMALIZER )
+       {
+               if ( ad->ad_type->sat_equality->smr_normalize(
+                       (SLAP_MR_DENORMALIZE|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX),
+                       NULL, NULL, value, &vtmp, memctx ) )
+               {
+                       return -1;
+               }
+               freeval = 2;
+
        } else if ( ad == slap_schema.si_ad_objectClass || ad == slap_schema.si_ad_structuralObjectClass ) {
                ldap_back_map( &dc->target->mt_rwmap.rwm_oc, value, &vtmp, remap );
                if ( BER_BVISNULL( &vtmp ) || BER_BVISEMPTY( &vtmp ) ) {
@@ -253,10 +319,15 @@ map_attr_value(
                vtmp = *value;
        }
 
-       filter_escape_value( &vtmp, mapped_value );
+       filter_escape_value_x( &vtmp, mapped_value, memctx );
 
-       if ( freeval ) {
+       switch ( freeval ) {
+       case 1:
                ber_memfree( vtmp.bv_val );
+               break;
+       case 2:
+               ber_memfree_x( vtmp.bv_val, memctx );
+               break;
        }
        
        return 0;
@@ -266,100 +337,119 @@ static int
 ldap_back_int_filter_map_rewrite(
                dncookie                *dc,
                Filter                  *f,
-               struct berval           *fstr,
-               int                     remap )
+               struct berval   *fstr,
+               int                             remap,
+               void                    *memctx )
 {
        int             i;
        Filter          *p;
-       struct berval   atmp;
-       struct berval   vtmp;
+       struct berval   atmp,
+                       vtmp,
+                       *tmp;
+       static struct berval
+                       /* better than nothing... */
+                       ber_bvfalse = BER_BVC( "(!(objectClass=*))" ),
+                       ber_bvtf_false = BER_BVC( "(|)" ),
+                       /* better than nothing... */
+                       ber_bvtrue = BER_BVC( "(objectClass=*)" ),
+                       ber_bvtf_true = BER_BVC( "(&)" ),
+#if 0
+                       /* no longer needed; preserved for completeness */
+                       ber_bvundefined = BER_BVC( "(?=undefined)" ),
+#endif
+                       ber_bverror = BER_BVC( "(?=error)" ),
+                       ber_bvunknown = BER_BVC( "(?=unknown)" ),
+                       ber_bvnone = BER_BVC( "(?=none)" );
        ber_len_t       len;
 
+       assert( fstr != NULL );
+       BER_BVZERO( fstr );
+
        if ( f == NULL ) {
-               ber_str2bv( "No filter!", STRLENOF( "No filter!" ), 1, fstr );
-               return -1;
+               ber_dupbv_x( fstr, &ber_bvnone, memctx );
+               return LDAP_OTHER;
        }
 
-       switch ( f->f_choice ) {
+       switch ( ( f->f_choice & SLAPD_FILTER_MASK ) ) {
        case LDAP_FILTER_EQUALITY:
                if ( map_attr_value( dc, f->f_av_desc, &atmp,
-                                       &f->f_av_value, &vtmp, remap ) )
+                                       &f->f_av_value, &vtmp, remap, memctx ) )
                {
-                       return -1;
+                       goto computed;
                }
 
                fstr->bv_len = atmp.bv_len + vtmp.bv_len
                        + ( sizeof("(=)") - 1 );
-               fstr->bv_val = malloc( fstr->bv_len + 1 );
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 1, memctx );
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=%s)",
-                       atmp.bv_val, vtmp.bv_val );
+                       atmp.bv_val, vtmp.bv_len ? vtmp.bv_val : "" );
 
-               ber_memfree( vtmp.bv_val );
+               ber_memfree_x( vtmp.bv_val, memctx );
                break;
 
        case LDAP_FILTER_GE:
                if ( map_attr_value( dc, f->f_av_desc, &atmp,
-                                       &f->f_av_value, &vtmp, remap ) )
+                                       &f->f_av_value, &vtmp, remap, memctx ) )
                {
-                       return -1;
+                       goto computed;
                }
 
                fstr->bv_len = atmp.bv_len + vtmp.bv_len
                        + ( sizeof("(>=)") - 1 );
-               fstr->bv_val = malloc( fstr->bv_len + 1 );
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 1, memctx );
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s>=%s)",
-                       atmp.bv_val, vtmp.bv_val );
+                       atmp.bv_val, vtmp.bv_len ? vtmp.bv_val : "" );
 
-               ber_memfree( vtmp.bv_val );
+               ber_memfree_x( vtmp.bv_val, memctx );
                break;
 
        case LDAP_FILTER_LE:
                if ( map_attr_value( dc, f->f_av_desc, &atmp,
-                                       &f->f_av_value, &vtmp, remap ) )
+                                       &f->f_av_value, &vtmp, remap, memctx ) )
                {
-                       return -1;
+                       goto computed;
                }
 
                fstr->bv_len = atmp.bv_len + vtmp.bv_len
                        + ( sizeof("(<=)") - 1 );
-               fstr->bv_val = malloc( fstr->bv_len + 1 );
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 1, memctx );
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s<=%s)",
-                       atmp.bv_val, vtmp.bv_val );
+                       atmp.bv_val, vtmp.bv_len ? vtmp.bv_val : "" );
 
-               ber_memfree( vtmp.bv_val );
+               ber_memfree_x( vtmp.bv_val, memctx );
                break;
 
        case LDAP_FILTER_APPROX:
                if ( map_attr_value( dc, f->f_av_desc, &atmp,
-                                       &f->f_av_value, &vtmp, remap ) )
+                                       &f->f_av_value, &vtmp, remap, memctx ) )
                {
-                       return -1;
+                       goto computed;
                }
 
                fstr->bv_len = atmp.bv_len + vtmp.bv_len
                        + ( sizeof("(~=)") - 1 );
-               fstr->bv_val = malloc( fstr->bv_len + 1 );
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 1, memctx );
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s~=%s)",
-                       atmp.bv_val, vtmp.bv_val );
+                       atmp.bv_val, vtmp.bv_len ? vtmp.bv_val : "" );
 
-               ber_memfree( vtmp.bv_val );
+               ber_memfree_x( vtmp.bv_val, memctx );
                break;
 
        case LDAP_FILTER_SUBSTRINGS:
                if ( map_attr_value( dc, f->f_sub_desc, &atmp,
-                                       NULL, NULL, remap ) )
+                                       NULL, NULL, remap, memctx ) )
                {
-                       return -1;
+                       goto computed;
                }
 
                /* cannot be a DN ... */
 
                fstr->bv_len = atmp.bv_len + ( STRLENOF( "(=*)" ) );
-               fstr->bv_val = malloc( fstr->bv_len + 128 ); /* FIXME: why 128 ? */
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 128, memctx ); /* FIXME: why 128 ? */
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
                        atmp.bv_val );
@@ -367,59 +457,59 @@ ldap_back_int_filter_map_rewrite(
                if ( !BER_BVISNULL( &f->f_sub_initial ) ) {
                        len = fstr->bv_len;
 
-                       filter_escape_value( &f->f_sub_initial, &vtmp );
+                       filter_escape_value_x( &f->f_sub_initial, &vtmp, memctx );
 
                        fstr->bv_len += vtmp.bv_len;
-                       fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );
+                       fstr->bv_val = ber_memrealloc_x( fstr->bv_val, fstr->bv_len + 1, memctx );
 
                        snprintf( &fstr->bv_val[len - 2], vtmp.bv_len + 3,
                                /* "(attr=" */ "%s*)",
-                               vtmp.bv_val );
+                               vtmp.bv_len ? vtmp.bv_val : "" );
 
-                       ber_memfree( vtmp.bv_val );
+                       ber_memfree_x( vtmp.bv_val, memctx );
                }
 
                if ( f->f_sub_any != NULL ) {
                        for ( i = 0; !BER_BVISNULL( &f->f_sub_any[i] ); i++ ) {
                                len = fstr->bv_len;
-                               filter_escape_value( &f->f_sub_any[i], &vtmp );
+                               filter_escape_value_x( &f->f_sub_any[i], &vtmp, memctx );
 
                                fstr->bv_len += vtmp.bv_len + 1;
-                               fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );
+                               fstr->bv_val = ber_memrealloc_x( fstr->bv_val, fstr->bv_len + 1, memctx );
 
                                snprintf( &fstr->bv_val[len - 1], vtmp.bv_len + 3,
                                        /* "(attr=[init]*[any*]" */ "%s*)",
-                                       vtmp.bv_val );
-                               ber_memfree( vtmp.bv_val );
+                                       vtmp.bv_len ? vtmp.bv_val : "" );
+                               ber_memfree_x( vtmp.bv_val, memctx );
                        }
                }
 
                if ( !BER_BVISNULL( &f->f_sub_final ) ) {
                        len = fstr->bv_len;
 
-                       filter_escape_value( &f->f_sub_final, &vtmp );
+                       filter_escape_value_x( &f->f_sub_final, &vtmp, memctx );
 
                        fstr->bv_len += vtmp.bv_len;
-                       fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );
+                       fstr->bv_val = ber_memrealloc_x( fstr->bv_val, fstr->bv_len + 1, memctx );
 
                        snprintf( &fstr->bv_val[len - 1], vtmp.bv_len + 3,
                                /* "(attr=[init*][any*]" */ "%s)",
-                               vtmp.bv_val );
+                               vtmp.bv_len ? vtmp.bv_val : "" );
 
-                       ber_memfree( vtmp.bv_val );
+                       ber_memfree_x( vtmp.bv_val, memctx );
                }
 
                break;
 
        case LDAP_FILTER_PRESENT:
                if ( map_attr_value( dc, f->f_desc, &atmp,
-                                       NULL, NULL, remap ) )
+                                       NULL, NULL, remap, memctx ) )
                {
-                       return -1;
+                       goto computed;
                }
 
                fstr->bv_len = atmp.bv_len + ( STRLENOF( "(=*)" ) );
-               fstr->bv_val = malloc( fstr->bv_len + 1 );
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 1, memctx );
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
                        atmp.bv_val );
@@ -429,27 +519,29 @@ ldap_back_int_filter_map_rewrite(
        case LDAP_FILTER_OR:
        case LDAP_FILTER_NOT:
                fstr->bv_len = STRLENOF( "(%)" );
-               fstr->bv_val = malloc( fstr->bv_len + 128 );    /* FIXME: why 128? */
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 128, memctx );    /* FIXME: why 128? */
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%c)",
                        f->f_choice == LDAP_FILTER_AND ? '&' :
                        f->f_choice == LDAP_FILTER_OR ? '|' : '!' );
 
                for ( p = f->f_list; p != NULL; p = p->f_next ) {
+                       int     rc;
+
                        len = fstr->bv_len;
 
-                       if ( ldap_back_int_filter_map_rewrite( dc, p, &vtmp, remap ) )
-                       {
-                               return -1;
+                       rc = ldap_back_int_filter_map_rewrite( dc, p, &vtmp, remap, memctx );
+                       if ( rc != LDAP_SUCCESS ) {
+                               return rc;
                        }
                        
                        fstr->bv_len += vtmp.bv_len;
-                       fstr->bv_val = ch_realloc( fstr->bv_val, fstr->bv_len + 1 );
+                       fstr->bv_val = ber_memrealloc_x( fstr->bv_val, fstr->bv_len + 1, memctx );
 
                        snprintf( &fstr->bv_val[len-1], vtmp.bv_len + 2, 
-                               /*"("*/ "%s)", vtmp.bv_val );
+                               /*"("*/ "%s)", vtmp.bv_len ? vtmp.bv_val : "" );
 
-                       ch_free( vtmp.bv_val );
+                       ber_memfree_x( vtmp.bv_val, memctx );
                }
 
                break;
@@ -457,14 +549,14 @@ ldap_back_int_filter_map_rewrite(
        case LDAP_FILTER_EXT:
                if ( f->f_mr_desc ) {
                        if ( map_attr_value( dc, f->f_mr_desc, &atmp,
-                                               &f->f_mr_value, &vtmp, remap ) )
+                                               &f->f_mr_value, &vtmp, remap, memctx ) )
                        {
-                               return -1;
+                               goto computed;
                        }
 
                } else {
                        BER_BVSTR( &atmp, "" );
-                       filter_escape_value( &f->f_mr_value, &vtmp );
+                       filter_escape_value_x( &f->f_mr_value, &vtmp, memctx );
                }
 
                /* FIXME: cleanup (less ?: operators...) */
@@ -472,57 +564,54 @@ ldap_back_int_filter_map_rewrite(
                        ( f->f_mr_dnattrs ? STRLENOF( ":dn" ) : 0 ) +
                        ( !BER_BVISEMPTY( &f->f_mr_rule_text ) ? f->f_mr_rule_text.bv_len + 1 : 0 ) +
                        vtmp.bv_len + ( STRLENOF( "(:=)" ) );
-               fstr->bv_val = malloc( fstr->bv_len + 1 );
+               fstr->bv_val = ber_memalloc_x( fstr->bv_len + 1, memctx );
 
                snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s%s%s%s:=%s)",
                        atmp.bv_val,
                        f->f_mr_dnattrs ? ":dn" : "",
                        !BER_BVISEMPTY( &f->f_mr_rule_text ) ? ":" : "",
                        !BER_BVISEMPTY( &f->f_mr_rule_text ) ? f->f_mr_rule_text.bv_val : "",
-                       vtmp.bv_val );
-               ber_memfree( vtmp.bv_val );
+                       vtmp.bv_len ? vtmp.bv_val : "" );
+               ber_memfree_x( vtmp.bv_val, memctx );
                break;
 
        case SLAPD_FILTER_COMPUTED:
                switch ( f->f_result ) {
-               case LDAP_COMPARE_FALSE:
-                       if ( dc->target->mt_flags & LDAP_BACK_F_SUPPORT_T_F ) {
-                               ber_str2bv( "(|)", STRLENOF( "(|)" ), 1, fstr );
+               /* FIXME: treat UNDEFINED as FALSE */
+               case SLAPD_COMPARE_UNDEFINED:
+computed:;
+                       if ( META_BACK_TGT_NOUNDEFFILTER( dc->target ) ) {
+                               return LDAP_COMPARE_FALSE;
+                       }
+                       /* fallthru */
 
-                       } else {
-#if 0
-                               ber_str2bv( "(?=false)", STRLENOF( "(?=false)" ), 1, fstr );
-#endif
-                               /* better than nothing... */
-                               ber_str2bv( "(!(objectClass=*))", STRLENOF( "(!(objectClass=*))" ), 1, fstr );
+               case LDAP_COMPARE_FALSE:
+                       if ( META_BACK_TGT_T_F( dc->target ) ) {
+                               tmp = &ber_bvtf_false;
+                               break;
                        }
+                       tmp = &ber_bvfalse;
                        break;
 
                case LDAP_COMPARE_TRUE:
-                       if ( dc->target->mt_flags & LDAP_BACK_F_SUPPORT_T_F ) {
-                               ber_str2bv( "(&)", STRLENOF( "(&)" ), 1, fstr );
-
-                       } else {
-#if 0
-                               ber_str2bv( "(?=true)", STRLENOF( "(?=true)" ), 1, fstr );
-#endif
-                               /* better than nothing... */
-                               ber_str2bv( "(objectClass=*)", STRLENOF( "(objectClass=*)" ), 1, fstr );
+                       if ( META_BACK_TGT_T_F( dc->target ) ) {
+                               tmp = &ber_bvtf_true;
+                               break;
                        }
-                       break;
 
-               case SLAPD_COMPARE_UNDEFINED:
-                       ber_str2bv( "(?=undefined)", STRLENOF( "(?=undefined)" ), 1, fstr );
+                       tmp = &ber_bvtrue;
                        break;
 
                default:
-                       ber_str2bv( "(?=error)", STRLENOF( "(?=error)" ), 1, fstr );
+                       tmp = &ber_bverror;
                        break;
                }
+
+               ber_dupbv_x( fstr, tmp, memctx );
                break;
 
        default:
-               ber_str2bv( "(?=unknown)", STRLENOF( "(?=unknown)" ), 1, fstr );
+               ber_dupbv_x( fstr, &ber_bvunknown, memctx );
                break;
        }
 
@@ -533,14 +622,16 @@ int
 ldap_back_filter_map_rewrite(
                dncookie                *dc,
                Filter                  *f,
-               struct berval           *fstr,
-               int                     remap )
+               struct berval   *fstr,
+               int                             remap,
+               void                    *memctx )
 {
        int             rc;
        dncookie        fdc;
        struct berval   ftmp;
+       static char     *dmy = "";
 
-       rc = ldap_back_int_filter_map_rewrite( dc, f, fstr, remap );
+       rc = ldap_back_int_filter_map_rewrite( dc, f, fstr, remap, memctx );
 
 #ifdef ENABLE_REWRITE
        if ( rc != LDAP_SUCCESS ) {
@@ -553,7 +644,7 @@ ldap_back_filter_map_rewrite(
        fdc.ctx = "searchFilter";
        
        switch ( rewrite_session( fdc.target->mt_rwmap.rwm_rw, fdc.ctx,
-                               ( !BER_BVISEMPTY( &ftmp ) ? ftmp.bv_val : "" ),
+                               ( !BER_BVISEMPTY( &ftmp ) ? ftmp.bv_val : dmy ),
                                fdc.conn, &fstr->bv_val ) )
        {
        case REWRITE_REGEXEC_OK:
@@ -586,6 +677,19 @@ ldap_back_filter_map_rewrite(
                rc = LDAP_OTHER;
                break;
        }
+
+       if ( fstr->bv_val == dmy ) {
+               BER_BVZERO( fstr );
+
+       } else if ( fstr->bv_val != ftmp.bv_val ) {
+               /* NOTE: need to realloc mapped filter on slab
+                * and free the original one, until librewrite
+                * becomes slab-aware
+                */
+               ber_dupbv_x( &ftmp, fstr, memctx );
+               ch_free( fstr->bv_val );
+               *fstr = ftmp;
+       }
 #endif /* ENABLE_REWRITE */
 
        return rc;
@@ -594,13 +698,14 @@ ldap_back_filter_map_rewrite(
 int
 ldap_back_referral_result_rewrite(
        dncookie                *dc,
-       BerVarray               a_vals
+       BerVarray               a_vals,
+       void                    *memctx
 )
 {
        int             i, last;
 
-       assert( dc );
-       assert( a_vals );
+       assert( dc != NULL );
+       assert( a_vals != NULL );
 
        for ( last = 0; !BER_BVISNULL( &a_vals[ last ] ); last++ )
                ;
@@ -636,7 +741,7 @@ ldap_back_referral_result_rewrite(
                         * legal to trim values when adding/modifying;
                         * it should be when searching (e.g. ACLs).
                         */
-                       LBER_FREE( a_vals[ i ].bv_val );
+                       ber_memfree( a_vals[ i ].bv_val );
                        if ( last > i ) {
                                a_vals[ i ] = a_vals[ last ];
                        }
@@ -653,6 +758,7 @@ ldap_back_referral_result_rewrite(
 
                                ludp->lud_dn = dn.bv_val;
                                newurl = ldap_url_desc2str( ludp );
+                               free( dn.bv_val );
                                if ( newurl == NULL ) {
                                        /* FIXME: leave attr untouched
                                         * even if ldap_url_desc2str failed...
@@ -660,9 +766,9 @@ ldap_back_referral_result_rewrite(
                                        break;
                                }
 
-                               LBER_FREE( a_vals[ i ].bv_val );
-                               ber_str2bv( newurl, 0, 1, &a_vals[ i ] );
-                               LDAP_FREE( newurl );
+                               ber_memfree_x( a_vals[ i ].bv_val, memctx );
+                               ber_str2bv_x( newurl, 0, 1, &a_vals[ i ], memctx );
+                               ber_memfree( newurl );
                                ludp->lud_dn = olddn.bv_val;
                        }
                        break;
@@ -748,7 +854,7 @@ ldap_dnattr_result_rewrite(
                         * legal to trim values when adding/modifying;
                         * it should be when searching (e.g. ACLs).
                         */
-                       LBER_FREE( a_vals[i].bv_val );
+                       ber_memfree( a_vals[i].bv_val );
                        if ( last > i ) {
                                a_vals[i] = a_vals[last];
                        }
@@ -759,7 +865,7 @@ ldap_dnattr_result_rewrite(
                default:
                        /* leave attr untouched if massage failed */
                        if ( !BER_BVISNULL( &bv ) && a_vals[i].bv_val != bv.bv_val ) {
-                               LBER_FREE( a_vals[i].bv_val );
+                               ber_memfree( a_vals[i].bv_val );
                                a_vals[i] = bv;
                        }
                        break;