Adding upstream version 2.5.13+dfsg.upstream/2.5.13+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 843 insertions, 0 deletions

diff --git a/servers/slapd/back-mdb/modify.c b/servers/slapd/back-mdb/modify.c
new file mode 100644
index 0000000..f2233e8
--- /dev/null
+++ b/servers/slapd/back-mdb/modify.c
@@ -0,0 +1,843 @@
+/* modify.c - mdb backend modify routine */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2022 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+#include <ac/time.h>
+
+#include "back-mdb.h"
+
+static struct berval scbva[] = {
+	BER_BVC("glue"),
+	BER_BVNULL
+};
+
+#define	CHECK_ADD	1
+#define	CHECK_DEL	2
+
+static void
+mdb_modify_idxflags(
+	Operation *op,
+	AttributeDescription *desc,
+	int ixcheck,
+	Attribute *newattrs,
+	Attribute *oldattrs )
+{
+	struct berval	ix_at;
+	AttrInfo	*ai;
+
+	/* check if modified attribute was indexed
+	 * but not in case of NOOP... */
+	ai = mdb_index_mask( op->o_bd, desc, &ix_at );
+	if ( ai ) {
+		if ( ixcheck & CHECK_DEL ) {
+			Attribute 	*ap;
+			struct berval	ix2;
+
+			ap = attr_find( oldattrs, desc );
+			if ( ap ) ap->a_flags |= SLAP_ATTR_IXDEL;
+
+			/* ITS#8678 FIXME
+			 * If using 32bit hashes, or substring index, must account for
+			 * possible index collisions. If no substring index, and using
+			 * 64bit hashes, assume we don't need to check for collisions.
+			 *
+			 * In 2.5 use refcounts and avoid all of this mess.
+			 */
+			if (!slap_hash64(-1) || (ai->ai_indexmask & SLAP_INDEX_SUBSTR)) {
+				/* Find all other attrs that index to same slot */
+				for ( ap = newattrs; ap; ap = ap->a_next ) {
+					ai = mdb_index_mask( op->o_bd, ap->a_desc, &ix2 );
+					if ( ai && ix2.bv_val == ix_at.bv_val )
+						ap->a_flags |= SLAP_ATTR_IXADD;
+				}
+			}
+
+		}
+		if ( ixcheck & CHECK_ADD ) {
+			Attribute 	*ap;
+
+			ap = attr_find( newattrs, desc );
+			if ( ap ) ap->a_flags |= SLAP_ATTR_IXADD;
+		}
+	}
+}
+
+int mdb_modify_internal(
+	Operation *op,
+	MDB_txn *tid,
+	Modifications *modlist,
+	Entry *e,
+	const char **text,
+	char *textbuf,
+	size_t textlen )
+{
+	struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
+	int rc, err;
+	Modification	*mod;
+	Modifications	*ml;
+	Attribute	*save_attrs;
+	Attribute 	*ap, *aold, *anew;
+	int			glue_attr_delete = 0;
+	int			softop, chkpresent;
+	int			ixcheck;
+	int			a_flags;
+	MDB_cursor	*mvc = NULL;
+
+	Debug( LDAP_DEBUG_TRACE, "mdb_modify_internal: 0x%08lx: %s\n",
+		e->e_id, e->e_dn );
+
+	if ( !acl_check_modlist( op, e, modlist )) {
+		return LDAP_INSUFFICIENT_ACCESS;
+	}
+
+	/* save_attrs will be disposed of by caller */
+	save_attrs = e->e_attrs;
+	e->e_attrs = attrs_dup( e->e_attrs );
+
+	for ( ml = modlist; ml != NULL; ml = ml->sml_next ) {
+		int match;
+		mod = &ml->sml_mod;
+		switch( mod->sm_op ) {
+		case LDAP_MOD_ADD:
+		case LDAP_MOD_REPLACE:
+			if ( mod->sm_desc == slap_schema.si_ad_structuralObjectClass ) {
+				value_match( &match, slap_schema.si_ad_structuralObjectClass,
+					slap_schema.si_ad_structuralObjectClass->
+						ad_type->sat_equality,
+					SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
+					&mod->sm_values[0], &scbva[0], text );
+				if ( !match ) glue_attr_delete = 1;
+			}
+		}
+		if ( glue_attr_delete )
+			break;
+	}
+
+	if ( glue_attr_delete ) {
+		Attribute	**app = &e->e_attrs;
+		while ( *app != NULL ) {
+			if ( !is_at_operational( (*app)->a_desc->ad_type )) {
+				Attribute *save = *app;
+				*app = (*app)->a_next;
+				attr_free( save );
+				continue;
+			}
+			app = &(*app)->a_next;
+		}
+	}
+
+	for ( ml = modlist; ml != NULL; ml = ml->sml_next ) {
+		mod = &ml->sml_mod;
+		ixcheck = 0;
+
+		aold = attr_find( e->e_attrs, mod->sm_desc );
+		if (aold)
+			a_flags = aold->a_flags;
+		else
+			a_flags = 0;
+
+		switch ( mod->sm_op ) {
+		case LDAP_MOD_ADD:
+			softop = 0;
+			chkpresent = 0;
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: add %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+
+do_add:
+			err = modify_add_values( e, mod, get_permissiveModify(op),
+				text, textbuf, textlen );
+
+			if( softop ) {
+				mod->sm_op = SLAP_MOD_SOFTADD;
+				if ( err == LDAP_TYPE_OR_VALUE_EXISTS )
+					err = LDAP_SUCCESS;
+			}
+			if( chkpresent ) {
+				mod->sm_op = SLAP_MOD_ADD_IF_NOT_PRESENT;
+			}
+
+			if( err != LDAP_SUCCESS ) {
+				Debug(LDAP_DEBUG_ARGS, "mdb_modify_internal: %d %s\n",
+					err, *text );
+			} else {
+				unsigned hi;
+				if (!aold)
+					anew = attr_find( e->e_attrs, mod->sm_desc );
+				else
+					anew = aold;
+				mdb_attr_multi_thresh( mdb, mod->sm_desc, &hi, NULL );
+				/* check for big multivalued attrs */
+				if ( anew->a_numvals > hi )
+					anew->a_flags |= SLAP_ATTR_BIG_MULTI;
+				if ( anew->a_flags & SLAP_ATTR_BIG_MULTI ) {
+					if (!mvc) {
+						err = mdb_cursor_open( tid, mdb->mi_dbis[MDB_ID2VAL], &mvc );
+						if (err) {
+mval_fail:					strncpy( textbuf, mdb_strerror( err ), textlen );
+							err = LDAP_OTHER;
+							break;
+						}
+					}
+					/* if prev was set, just add new values */
+					if (a_flags & SLAP_ATTR_BIG_MULTI ) {
+						anew = (Attribute *)mod;
+						/* Tweak nvals */
+						if (!anew->a_nvals)
+							anew->a_nvals = anew->a_vals;
+					}
+					err = mdb_mval_put(op, mvc, e->e_id, anew);
+					if (a_flags & SLAP_ATTR_BIG_MULTI ) {
+						/* Undo nvals tweak */
+						if (anew->a_nvals == anew->a_vals)
+							anew->a_nvals = NULL;
+					}
+					if ( err )
+						goto mval_fail;
+				}
+				ixcheck |= CHECK_ADD;
+			}
+			break;
+
+		case LDAP_MOD_DELETE:
+			if ( glue_attr_delete ) {
+				err = LDAP_SUCCESS;
+				break;
+			}
+
+			softop = 0;
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: delete %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+do_del:
+			err = modify_delete_values( e, mod, get_permissiveModify(op),
+				text, textbuf, textlen );
+
+			if (softop) {
+				mod->sm_op = SLAP_MOD_SOFTDEL;
+				if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
+					err = LDAP_SUCCESS;
+					softop = 2;
+				}
+			}
+
+			if( err != LDAP_SUCCESS ) {
+				Debug(LDAP_DEBUG_ARGS, "mdb_modify_internal: %d %s\n",
+					err, *text );
+			} else {
+				if (softop != 2)
+					ixcheck |= CHECK_DEL;
+				/* check for big multivalued attrs */
+				if (a_flags & SLAP_ATTR_BIG_MULTI) {
+					Attribute a_dummy;
+					if (!mvc) {
+						err = mdb_cursor_open( tid, mdb->mi_dbis[MDB_ID2VAL], &mvc );
+						if (err)
+							goto mval_fail;
+					}
+					if ( mod->sm_numvals ) {
+						anew = attr_find( e->e_attrs, mod->sm_desc );
+						if ( anew ) {
+							unsigned lo;
+							mdb_attr_multi_thresh( mdb, mod->sm_desc, NULL, &lo );
+							if ( anew->a_numvals < lo ) {
+								anew->a_flags ^= SLAP_ATTR_BIG_MULTI;
+								anew = NULL;
+							} else {
+								anew = (Attribute *)mod;
+							}
+						}
+					} else {
+						anew = NULL;
+					}
+					if (!anew) {
+					/* delete all values */
+						anew = &a_dummy;
+						anew->a_desc = mod->sm_desc;
+						anew->a_numvals = 0;
+					}
+					err = mdb_mval_del( op, mvc, e->e_id, anew );
+					if ( err )
+						goto mval_fail;
+				}
+			}
+			break;
+
+		case LDAP_MOD_REPLACE:
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: replace %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+			err = modify_replace_values( e, mod, get_permissiveModify(op),
+				text, textbuf, textlen );
+			if( err != LDAP_SUCCESS ) {
+				Debug(LDAP_DEBUG_ARGS, "mdb_modify_internal: %d %s\n",
+					err, *text );
+			} else {
+				unsigned hi;
+				ixcheck = CHECK_DEL;
+				if ( mod->sm_numvals )
+					ixcheck |= CHECK_ADD;
+				if (a_flags & SLAP_ATTR_BIG_MULTI) {
+					Attribute a_dummy;
+					if (!mvc) {
+						err = mdb_cursor_open( tid, mdb->mi_dbis[MDB_ID2VAL], &mvc );
+						if (err)
+							goto mval_fail;
+					}
+					/* delete all values */
+					anew = &a_dummy;
+					anew->a_desc = mod->sm_desc;
+					anew->a_numvals = 0;
+					err = mdb_mval_del( op, mvc, e->e_id, anew );
+					if (err)
+						goto mval_fail;
+				}
+				anew = attr_find( e->e_attrs, mod->sm_desc );
+				mdb_attr_multi_thresh( mdb, mod->sm_desc, &hi, NULL );
+				if (mod->sm_numvals > hi) {
+					anew->a_flags |= SLAP_ATTR_BIG_MULTI;
+					if (!mvc) {
+						err = mdb_cursor_open( tid, mdb->mi_dbis[MDB_ID2VAL], &mvc );
+						if (err)
+							goto mval_fail;
+					}
+					err = mdb_mval_put(op, mvc, e->e_id, anew);
+					if (err)
+						goto mval_fail;
+				} else if (anew) {
+					/* revert back to normal attr */
+					anew->a_flags &= ~SLAP_ATTR_BIG_MULTI;
+				}
+			}
+			break;
+
+		case LDAP_MOD_INCREMENT:
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: increment %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+			err = modify_increment_values( e, mod, get_permissiveModify(op),
+				text, textbuf, textlen );
+			if( err != LDAP_SUCCESS ) {
+				Debug(LDAP_DEBUG_ARGS,
+					"mdb_modify_internal: %d %s\n",
+					err, *text );
+			} else {
+				ixcheck = CHECK_ADD|CHECK_DEL;
+			}
+			break;
+
+		case SLAP_MOD_SOFTADD:
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: softadd %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+ 			/* Avoid problems in index_add_mods()
+ 			 * We need to add index if necessary.
+ 			 */
+ 			mod->sm_op = LDAP_MOD_ADD;
+			softop = 1;
+			chkpresent = 0;
+			goto do_add;
+
+		case SLAP_MOD_SOFTDEL:
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: softdel %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+ 			/* Avoid problems in index_delete_mods()
+ 			 * We need to add index if necessary.
+ 			 */
+ 			mod->sm_op = LDAP_MOD_DELETE;
+			softop = 1;
+			goto do_del;
+
+		case SLAP_MOD_ADD_IF_NOT_PRESENT:
+			if ( attr_find( e->e_attrs, mod->sm_desc ) != NULL ) {
+				/* skip */
+				err = LDAP_SUCCESS;
+				break;
+			}
+
+			Debug(LDAP_DEBUG_ARGS,
+				"mdb_modify_internal: add_if_not_present %s\n",
+				mod->sm_desc->ad_cname.bv_val );
+ 			/* Avoid problems in index_add_mods()
+ 			 * We need to add index if necessary.
+ 			 */
+ 			mod->sm_op = LDAP_MOD_ADD;
+			softop = 0;
+			chkpresent = 1;
+			goto do_add;
+
+		default:
+			Debug(LDAP_DEBUG_ANY, "mdb_modify_internal: invalid op %d\n",
+				mod->sm_op );
+			*text = "Invalid modify operation";
+			err = LDAP_OTHER;
+			Debug(LDAP_DEBUG_ARGS, "mdb_modify_internal: %d %s\n",
+				err, *text );
+		}
+
+		if ( err != LDAP_SUCCESS ) {
+			attrs_free( e->e_attrs );
+			e->e_attrs = save_attrs;
+			/* unlock entry, delete from cache */
+			return err; 
+		}
+
+		/* If objectClass was modified, reset the flags */
+		if ( mod->sm_desc == slap_schema.si_ad_objectClass ) {
+			e->e_ocflags = 0;
+		}
+
+		if ( glue_attr_delete ) e->e_ocflags = 0;
+
+
+		/* check if modified attribute was indexed
+		 * but not in case of NOOP... */
+		if ( !op->o_noop ) {
+			mdb_modify_idxflags( op, mod->sm_desc, ixcheck, e->e_attrs, save_attrs );
+		}
+	}
+
+	/* check that the entry still obeys the schema */
+	ap = NULL;
+	rc = entry_schema_check( op, e, save_attrs, get_relax(op), 0, &ap,
+		text, textbuf, textlen );
+	if ( rc != LDAP_SUCCESS || op->o_noop ) {
+		attrs_free( e->e_attrs );
+		/* clear the indexing flags */
+		for ( ap = save_attrs; ap != NULL; ap = ap->a_next ) {
+			ap->a_flags &= ~(SLAP_ATTR_IXADD|SLAP_ATTR_IXDEL);
+		}
+		e->e_attrs = save_attrs;
+
+		if ( rc != LDAP_SUCCESS ) {
+			Debug( LDAP_DEBUG_ANY,
+				"entry failed schema check: %s\n",
+				*text );
+		}
+
+		/* if NOOP then silently revert to saved attrs */
+		return rc;
+	}
+
+	/* structuralObjectClass modified! */
+	if ( ap ) {
+		assert( ap->a_desc == slap_schema.si_ad_structuralObjectClass );
+		if ( !op->o_noop ) {
+			mdb_modify_idxflags( op, slap_schema.si_ad_structuralObjectClass,
+				CHECK_ADD|CHECK_DEL, e->e_attrs, save_attrs );
+		}
+	}
+
+	/* update the indices of the modified attributes */
+
+	/* start with deleting the old index entries */
+	for ( ap = save_attrs; ap != NULL; ap = ap->a_next ) {
+		if ( ap->a_flags & SLAP_ATTR_IXDEL ) {
+			struct berval *vals;
+			Attribute *a2;
+			ap->a_flags &= ~SLAP_ATTR_IXDEL;
+			a2 = attr_find( e->e_attrs, ap->a_desc );
+			if ( a2 ) {
+				/* need to detect which values were deleted */
+				int i, j, k;
+				/* let add know there were deletes */
+				if ( a2->a_flags & SLAP_ATTR_IXADD )
+					a2->a_flags |= SLAP_ATTR_IXDEL;
+				vals = op->o_tmpalloc( (ap->a_numvals + 1) *
+					sizeof(struct berval), op->o_tmpmemctx );
+				j = 0;
+				for ( i=k=0; i < ap->a_numvals; i++ ) {
+					char found = 0;
+					BerValue* current = &ap->a_nvals[i];
+					int k2 = k;
+					for (k2 = k ; k2 < a2->a_numvals; k2 ++) {
+						int match = -1, rc;
+						const char *text;
+
+						rc = ordered_value_match( &match, a2->a_desc,
+								ap->a_desc->ad_type->sat_equality, 0,
+							&a2->a_nvals[k2], current, &text );
+						if ( rc == LDAP_SUCCESS && match == 0 ) {
+							found = 1;
+							break;
+						}
+					}
+
+					if (!found) {
+						vals[j++] = *current;
+					} else {
+						k = k2 + 1;
+					}
+				}
+				BER_BVZERO(vals+j);
+			} else {
+				/* attribute was completely deleted */
+				vals = ap->a_nvals;
+			}
+			rc = 0;
+			if ( !BER_BVISNULL( vals )) {
+				rc = mdb_index_values( op, tid, ap->a_desc,
+					vals, e->e_id, SLAP_INDEX_DELETE_OP );
+				if ( rc != LDAP_SUCCESS ) {
+					Debug( LDAP_DEBUG_ANY,
+						"%s: attribute \"%s\" index delete failure\n",
+						op->o_log_prefix, ap->a_desc->ad_cname.bv_val );
+					attrs_free( e->e_attrs );
+					e->e_attrs = save_attrs;
+				}
+			}
+			if ( vals != ap->a_nvals )
+				op->o_tmpfree( vals, op->o_tmpmemctx );
+			if ( rc ) return rc;
+		}
+	}
+
+	/* add the new index entries */
+	for ( ap = e->e_attrs; ap != NULL; ap = ap->a_next ) {
+		if (ap->a_flags & SLAP_ATTR_IXADD) {
+			ap->a_flags &= ~SLAP_ATTR_IXADD;
+			if ( ap->a_flags & SLAP_ATTR_IXDEL ) {
+				/* if any values were deleted, we must readd index
+				 * for all remaining values.
+				 */
+				ap->a_flags &= ~SLAP_ATTR_IXDEL;
+				rc = mdb_index_values( op, tid, ap->a_desc,
+					ap->a_nvals,
+					e->e_id, SLAP_INDEX_ADD_OP );
+			} else {
+				int found = 0;
+				/* if this was only an add, we only need to index
+				 * the added values.
+				 */
+				for ( ml = modlist; ml != NULL; ml = ml->sml_next ) {
+					struct berval *vals;
+					if ( ml->sml_desc != ap->a_desc || !ml->sml_numvals )
+						continue;
+					found = 1;
+					switch( ml->sml_op ) {
+					case LDAP_MOD_ADD:
+					case LDAP_MOD_REPLACE:
+					case LDAP_MOD_INCREMENT:
+					case SLAP_MOD_SOFTADD:
+					case SLAP_MOD_ADD_IF_NOT_PRESENT:
+						if ( ml->sml_op == LDAP_MOD_INCREMENT )
+							vals = ap->a_nvals;
+						else if ( ml->sml_nvalues )
+							vals = ml->sml_nvalues;
+						else
+							vals = ml->sml_values;
+						rc = mdb_index_values( op, tid, ap->a_desc,
+							vals, e->e_id, SLAP_INDEX_ADD_OP );
+						break;
+					}
+					if ( rc )
+						break;
+				}
+				/* This attr was affected by a modify of a subtype, so
+				 * there was no direct match in the modlist. Just readd
+				 * all of its values.
+				 */
+				if ( !found ) {
+					rc = mdb_index_values( op, tid, ap->a_desc,
+						ap->a_nvals,
+						e->e_id, SLAP_INDEX_ADD_OP );
+				}
+			}
+			if ( rc != LDAP_SUCCESS ) {
+				Debug( LDAP_DEBUG_ANY,
+				       "%s: attribute \"%s\" index add failure\n",
+					op->o_log_prefix, ap->a_desc->ad_cname.bv_val );
+				attrs_free( e->e_attrs );
+				e->e_attrs = save_attrs;
+				return rc;
+			}
+		}
+	}
+
+	return rc;
+}
+
+
+int
+mdb_modify( Operation *op, SlapReply *rs )
+{
+	struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
+	Entry		*e = NULL;
+	int		manageDSAit = get_manageDSAit( op );
+	char textbuf[SLAP_TEXT_BUFLEN];
+	size_t textlen = sizeof textbuf;
+	MDB_txn	*txn = NULL;
+	mdb_op_info opinfo = {{{ 0 }}}, *moi = &opinfo;
+	Entry		dummy = {0};
+
+	LDAPControl **preread_ctrl = NULL;
+	LDAPControl **postread_ctrl = NULL;
+	LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
+	int num_ctrls = 0;
+	int numads = mdb->mi_numads;
+
+	Debug( LDAP_DEBUG_ARGS, LDAP_XSTRING(mdb_modify) ": %s\n",
+		op->o_req_dn.bv_val );
+
+	ctrls[num_ctrls] = NULL;
+
+	/* begin transaction */
+	rs->sr_err = mdb_opinfo_get( op, mdb, 0, &moi );
+	rs->sr_text = NULL;
+	if( rs->sr_err != 0 ) {
+		Debug( LDAP_DEBUG_TRACE,
+			LDAP_XSTRING(mdb_modify) ": txn_begin failed: "
+			"%s (%d)\n", mdb_strerror(rs->sr_err), rs->sr_err );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "internal error";
+		goto return_results;
+	}
+	txn = moi->moi_txn;
+
+	/* Don't touch the opattrs, if this is a contextCSN update
+	 * initiated from updatedn */
+	if ( !be_isupdate(op) || !op->orm_modlist || op->orm_modlist->sml_next ||
+		 op->orm_modlist->sml_desc != slap_schema.si_ad_contextCSN ) {
+
+		slap_mods_opattrs( op, &op->orm_modlist, 1 );
+	}
+
+	/* get entry or ancestor */
+	rs->sr_err = mdb_dn2entry( op, txn, NULL, &op->o_req_ndn, &e, NULL, 1 );
+
+	if ( rs->sr_err != 0 ) {
+		Debug( LDAP_DEBUG_TRACE,
+			LDAP_XSTRING(mdb_modify) ": dn2entry failed (%d)\n",
+			rs->sr_err );
+		switch( rs->sr_err ) {
+		case MDB_NOTFOUND:
+			break;
+		case LDAP_BUSY:
+			rs->sr_text = "ldap server busy";
+			goto return_results;
+		default:
+			rs->sr_err = LDAP_OTHER;
+			rs->sr_text = "internal error";
+			goto return_results;
+		}
+	}
+
+	/* acquire and lock entry */
+	/* FIXME: dn2entry() should return non-glue entry */
+	if (( rs->sr_err == MDB_NOTFOUND ) ||
+		( !manageDSAit && e && is_entry_glue( e )))
+	{
+		if ( e != NULL ) {
+			rs->sr_matched = ch_strdup( e->e_dn );
+			if ( is_entry_referral( e )) {
+				BerVarray ref = get_entry_referrals( op, e );
+				rs->sr_ref = referral_rewrite( ref, &e->e_name,
+					&op->o_req_dn, LDAP_SCOPE_DEFAULT );
+				ber_bvarray_free( ref );
+			} else {
+				rs->sr_ref = NULL;
+			}
+			mdb_entry_return( op, e );
+			e = NULL;
+
+		} else {
+			rs->sr_ref = referral_rewrite( default_referral, NULL,
+				&op->o_req_dn, LDAP_SCOPE_DEFAULT );
+		}
+
+		rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+		rs->sr_err = LDAP_REFERRAL;
+		send_ldap_result( op, rs );
+		goto done;
+	}
+
+	if ( !manageDSAit && is_entry_referral( e ) ) {
+		/* entry is a referral, don't allow modify */
+		rs->sr_ref = get_entry_referrals( op, e );
+
+		Debug( LDAP_DEBUG_TRACE,
+			LDAP_XSTRING(mdb_modify) ": entry is referral\n" );
+
+		rs->sr_err = LDAP_REFERRAL;
+		rs->sr_matched = e->e_name.bv_val;
+		rs->sr_flags = REP_REF_MUSTBEFREED;
+		send_ldap_result( op, rs );
+		rs->sr_matched = NULL;
+		goto done;
+	}
+
+	if ( get_assert( op ) &&
+		( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
+	{
+		rs->sr_err = LDAP_ASSERTION_FAILED;
+		goto return_results;
+	}
+
+	if( op->o_preread ) {
+		if( preread_ctrl == NULL ) {
+			preread_ctrl = &ctrls[num_ctrls++];
+			ctrls[num_ctrls] = NULL;
+		}
+		if ( slap_read_controls( op, rs, e,
+			&slap_pre_read_bv, preread_ctrl ) )
+		{
+			Debug( LDAP_DEBUG_TRACE,
+				"<=- " LDAP_XSTRING(mdb_modify) ": pre-read "
+				"failed!\n" );
+			if ( op->o_preread & SLAP_CONTROL_CRITICAL ) {
+				/* FIXME: is it correct to abort
+				 * operation if control fails? */
+				goto return_results;
+			}
+		}
+	}
+
+	/* Modify the entry */
+	dummy = *e;
+	rs->sr_err = mdb_modify_internal( op, txn, op->orm_modlist,
+		&dummy, &rs->sr_text, textbuf, textlen );
+
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_TRACE,
+			LDAP_XSTRING(mdb_modify) ": modify failed (%d)\n",
+			rs->sr_err );
+		/* Only free attrs if they were dup'd.  */
+		if ( dummy.e_attrs == e->e_attrs ) dummy.e_attrs = NULL;
+		goto return_results;
+	}
+
+	/* change the entry itself */
+	rs->sr_err = mdb_id2entry_update( op, txn, NULL, &dummy );
+	if ( rs->sr_err != 0 ) {
+		Debug( LDAP_DEBUG_TRACE,
+			LDAP_XSTRING(mdb_modify) ": id2entry update failed " "(%d)\n",
+			rs->sr_err );
+		if ( rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED ) {
+			rs->sr_text = "entry too big";
+		} else {
+			rs->sr_err = LDAP_OTHER;
+			rs->sr_text = "entry update failed";
+		}
+		goto return_results;
+	}
+
+	if( op->o_postread ) {
+		if( postread_ctrl == NULL ) {
+			postread_ctrl = &ctrls[num_ctrls++];
+			ctrls[num_ctrls] = NULL;
+		}
+		if( slap_read_controls( op, rs, &dummy,
+			&slap_post_read_bv, postread_ctrl ) )
+		{
+			Debug( LDAP_DEBUG_TRACE,
+				"<=- " LDAP_XSTRING(mdb_modify)
+				": post-read failed!\n" );
+			if ( op->o_postread & SLAP_CONTROL_CRITICAL ) {
+				/* FIXME: is it correct to abort
+				 * operation if control fails? */
+				goto return_results;
+			}
+		}
+	}
+
+	/* Only free attrs if they were dup'd.  */
+	if ( dummy.e_attrs == e->e_attrs ) dummy.e_attrs = NULL;
+	if( moi == &opinfo ) {
+		LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
+		opinfo.moi_oe.oe_key = NULL;
+		if( op->o_noop ) {
+			mdb->mi_numads = numads;
+			mdb_txn_abort( txn );
+			rs->sr_err = LDAP_X_NO_OPERATION;
+			txn = NULL;
+			goto return_results;
+		} else {
+			rs->sr_err = mdb_txn_commit( txn );
+			if ( rs->sr_err )
+				mdb->mi_numads = numads;
+			txn = NULL;
+		}
+	}
+
+	if( rs->sr_err != 0 ) {
+		Debug( LDAP_DEBUG_ANY,
+			LDAP_XSTRING(mdb_modify) ": txn_%s failed: %s (%d)\n",
+			op->o_noop ? "abort (no-op)" : "commit",
+			mdb_strerror(rs->sr_err), rs->sr_err );
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "commit failed";
+
+		goto return_results;
+	}
+
+	Debug( LDAP_DEBUG_TRACE,
+		LDAP_XSTRING(mdb_modify) ": updated%s id=%08lx dn=\"%s\"\n",
+		op->o_noop ? " (no-op)" : "",
+		dummy.e_id, op->o_req_dn.bv_val );
+
+	rs->sr_err = LDAP_SUCCESS;
+	rs->sr_text = NULL;
+	if( num_ctrls ) rs->sr_ctrls = ctrls;
+
+return_results:
+	if( dummy.e_attrs ) {
+		attrs_free( dummy.e_attrs );
+	}
+	send_ldap_result( op, rs );
+
+#if 0
+	if( rs->sr_err == LDAP_SUCCESS && mdb->bi_txn_cp_kbyte ) {
+		TXN_CHECKPOINT( mdb->bi_dbenv,
+			mdb->bi_txn_cp_kbyte, mdb->bi_txn_cp_min, 0 );
+	}
+#endif
+
+done:
+	slap_graduate_commit_csn( op );
+
+	if( moi == &opinfo ) {
+		if( txn != NULL ) {
+			mdb->mi_numads = numads;
+			mdb_txn_abort( txn );
+		}
+		if ( opinfo.moi_oe.oe_key ) {
+			LDAP_SLIST_REMOVE( &op->o_extra, &opinfo.moi_oe, OpExtra, oe_next );
+		}
+	} else {
+		moi->moi_ref--;
+	}
+
+	if( e != NULL ) {
+		mdb_entry_return( op, e );
+	}
+
+	if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
+		slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
+		slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
+	}
+	if( postread_ctrl != NULL && (*postread_ctrl) != NULL ) {
+		slap_sl_free( (*postread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
+		slap_sl_free( *postread_ctrl, op->o_tmpmemctx );
+	}
+
+	rs->sr_text = NULL;
+
+	return rs->sr_err;
+}