]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/back-bdb/add.c
don't leave 'round pointers to buffers on the stack
[openldap] / servers / slapd / back-bdb / add.c
index 1c7be0387ec1622d656111bb6a321eb0bde16f26..2e966d3525e9cffe890aa9fd902166f6c42cd915 100644 (file)
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 2000-2006 The OpenLDAP Foundation.
+ * Copyright 2000-2007 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,7 +26,7 @@ bdb_add(Operation *op, SlapReply *rs )
 {
        struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
        struct berval   pdn;
-       Entry           *p = NULL;
+       Entry           *p = NULL, *oe = op->ora_e;
        EntryInfo       *ei;
        char textbuf[SLAP_TEXT_BUFLEN];
        size_t textlen = sizeof textbuf;
@@ -35,10 +35,11 @@ bdb_add(Operation *op, SlapReply *rs )
        DB_TXN          *ltid = NULL, *lt2;
        struct bdb_op_info opinfo = {0};
        int subentry;
-       u_int32_t       locker = 0;
+       BDB_LOCKER      locker = 0, rlocker = 0;
        DB_LOCK         lock;
 
        int             num_retries = 0;
+       int             success;
 
        LDAPControl **postread_ctrl = NULL;
        LDAPControl *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
@@ -91,13 +92,10 @@ txnReturn:
 
        ctrls[num_ctrls] = 0;
 
-       /* add opattrs to shadow as well, only missing attrs will actually
-        * be added; helps compatibility with older OL versions */
-       slap_add_opattrs( op, &rs->sr_text, textbuf, textlen, 1 );
 
        /* check entry's schema */
        rs->sr_err = entry_schema_check( op, op->oq_add.rs_e, NULL,
-               get_manageDIT(op), &rs->sr_text, textbuf, textlen );
+               get_relax(op), 1, &rs->sr_text, textbuf, textlen );
        if ( rs->sr_err != LDAP_SUCCESS ) {
                Debug( LDAP_DEBUG_TRACE,
                        LDAP_XSTRING(bdb_add) ": entry failed schema check: "
@@ -105,6 +103,16 @@ txnReturn:
                goto return_results;
        }
 
+       /* add opattrs to shadow as well, only missing attrs will actually
+        * be added; helps compatibility with older OL versions */
+       rs->sr_err = slap_add_opattrs( op, &rs->sr_text, textbuf, textlen, 1 );
+       if ( rs->sr_err != LDAP_SUCCESS ) {
+               Debug( LDAP_DEBUG_TRACE,
+                       LDAP_XSTRING(bdb_add) ": entry failed op attrs add: "
+                       "%s (%d)\n", rs->sr_text, rs->sr_err, 0 );
+               goto return_results;
+       }
+
        subentry = is_entry_subentry( op->oq_add.rs_e );
 
        /*
@@ -121,12 +129,15 @@ txnReturn:
                goto return_results;
        }
 
+       /* Get our thread locker ID */
+       rs->sr_err = LOCK_ID( bdb->bi_dbenv, &rlocker );
+
        if( 0 ) {
 retry: /* transaction retry */
                if( p ) {
                        /* free parent and reader lock */
                        if ( p != (Entry *)&slap_entry_root ) {
-                               bdb_unlocked_cache_return_entry_r( &bdb->bi_cache, p );
+                               bdb_unlocked_cache_return_entry_r( bdb, p );
                        }
                        p = NULL;
                }
@@ -163,7 +174,6 @@ retry:      /* transaction retry */
 
        opinfo.boi_bdb = op->o_bd;
        opinfo.boi_txn = ltid;
-       opinfo.boi_locker = locker;
        opinfo.boi_err = 0;
        opinfo.boi_acl_cache = op->o_do_not_cache;
        op->o_private = &opinfo;
@@ -208,7 +218,7 @@ retry:      /* transaction retry */
                rs->sr_ref = is_entry_referral( p )
                        ? get_entry_referrals( op, p )
                        : NULL;
-               bdb_unlocked_cache_return_entry_r( &bdb->bi_cache, p );
+               bdb_unlocked_cache_return_entry_r( bdb, p );
                p = NULL;
                Debug( LDAP_DEBUG_TRACE,
                        LDAP_XSTRING(bdb_add) ": parent "
@@ -237,39 +247,43 @@ retry:    /* transaction retry */
                goto return_results;;
        }
 
-       if ( is_entry_subentry( p ) ) {
-               /* parent is a subentry, don't allow add */
-               Debug( LDAP_DEBUG_TRACE,
-                       LDAP_XSTRING(bdb_add) ": parent is subentry\n",
-                       0, 0, 0 );
-               rs->sr_err = LDAP_OBJECT_CLASS_VIOLATION;
-               rs->sr_text = "parent is a subentry";
-               goto return_results;;
-       }
-       if ( is_entry_alias( p ) ) {
-               /* parent is an alias, don't allow add */
-               Debug( LDAP_DEBUG_TRACE,
-                       LDAP_XSTRING(bdb_add) ": parent is alias\n",
-                       0, 0, 0 );
-               rs->sr_err = LDAP_ALIAS_PROBLEM;
-               rs->sr_text = "parent is an alias";
-               goto return_results;;
-       }
+       if ( p != (Entry *)&slap_entry_root ) {
+               if ( is_entry_subentry( p ) ) {
+                       /* parent is a subentry, don't allow add */
+                       Debug( LDAP_DEBUG_TRACE,
+                               LDAP_XSTRING(bdb_add) ": parent is subentry\n",
+                               0, 0, 0 );
+                       rs->sr_err = LDAP_OBJECT_CLASS_VIOLATION;
+                       rs->sr_text = "parent is a subentry";
+                       goto return_results;;
+               }
 
-       if ( is_entry_referral( p ) ) {
-               /* parent is a referral, don't allow add */
-               rs->sr_matched = ber_strdup_x( p->e_name.bv_val,
-                       op->o_tmpmemctx );
-               rs->sr_ref = get_entry_referrals( op, p );
-               bdb_unlocked_cache_return_entry_r( &bdb->bi_cache, p );
-               p = NULL;
-               Debug( LDAP_DEBUG_TRACE,
-                       LDAP_XSTRING(bdb_add) ": parent is referral\n",
-                       0, 0, 0 );
+               if ( is_entry_alias( p ) ) {
+                       /* parent is an alias, don't allow add */
+                       Debug( LDAP_DEBUG_TRACE,
+                               LDAP_XSTRING(bdb_add) ": parent is alias\n",
+                               0, 0, 0 );
+                       rs->sr_err = LDAP_ALIAS_PROBLEM;
+                       rs->sr_text = "parent is an alias";
+                       goto return_results;;
+               }
+
+               if ( is_entry_referral( p ) ) {
+                       /* parent is a referral, don't allow add */
+                       rs->sr_matched = ber_strdup_x( p->e_name.bv_val,
+                               op->o_tmpmemctx );
+                       rs->sr_ref = get_entry_referrals( op, p );
+                       bdb_unlocked_cache_return_entry_r( bdb, p );
+                       p = NULL;
+                       Debug( LDAP_DEBUG_TRACE,
+                               LDAP_XSTRING(bdb_add) ": parent is referral\n",
+                               0, 0, 0 );
+
+                       rs->sr_err = LDAP_REFERRAL;
+                       rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+                       goto return_results;
+               }
 
-               rs->sr_err = LDAP_REFERRAL;
-               rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
-               goto return_results;
        }
 
        if ( subentry ) {
@@ -279,7 +293,7 @@ retry:      /* transaction retry */
 
        /* free parent and reader lock */
        if ( p != (Entry *)&slap_entry_root ) {
-               bdb_unlocked_cache_return_entry_r( &bdb->bi_cache, p );
+               bdb_unlocked_cache_return_entry_r( bdb, p );
        }
        p = NULL;
 
@@ -386,7 +400,11 @@ retry:     /* transaction retry */
                        Debug( LDAP_DEBUG_TRACE,
                                "<=- " LDAP_XSTRING(bdb_add) ": post-read "
                                "failed!\n", 0, 0, 0 );
-                       goto return_results;
+                       if ( op->o_postread & SLAP_CONTROL_CRITICAL ) {
+                               /* FIXME: is it correct to abort
+                                * operation if control fails? */
+                               goto return_results;
+                       }
                }
        }
 
@@ -401,17 +419,17 @@ retry:    /* transaction retry */
 
        } else {
                struct berval nrdn;
-               Entry *e = entry_dup( op->ora_e );
 
                /* pick the RDN if not suffix; otherwise pick the entire DN */
                if (pdn.bv_len) {
-                       nrdn.bv_val = e->e_nname.bv_val;
+                       nrdn.bv_val = op->ora_e->e_nname.bv_val;
                        nrdn.bv_len = pdn.bv_val - op->ora_e->e_nname.bv_val - 1;
                } else {
-                       nrdn = e->e_nname;
+                       nrdn = op->ora_e->e_nname;
                }
 
-               bdb_cache_add( bdb, ei, e, &nrdn, locker );
+               /* Use the thread locker here, outside the txn */
+               bdb_cache_add( bdb, ei, op->ora_e, &nrdn, rlocker, &lock );
 
                if(( rs->sr_err=TXN_COMMIT( ltid, 0 )) != 0 ) {
                        rs->sr_text = "txn_commit failed";
@@ -440,6 +458,7 @@ retry:      /* transaction retry */
        if( num_ctrls ) rs->sr_ctrls = ctrls;
 
 return_results:
+       success = rs->sr_err;
        send_ldap_result( op, rs );
        slap_graduate_commit_csn( op );
 
@@ -448,14 +467,26 @@ return_results:
        }
        op->o_private = NULL;
 
+       if( success == LDAP_SUCCESS ) {
+               /* We own the entry now, and it can be purged at will
+                * Check to make sure it's the same entry we entered with.
+                * Possibly a callback may have mucked with it, although
+                * in general callbacks should treat the entry as read-only.
+                */
+               bdb_cache_return_entry_r( bdb, oe, &lock );
+               if ( op->ora_e == oe )
+                       op->ora_e = NULL;
+
+               if ( bdb->bi_txn_cp_kbyte ) {
+                       TXN_CHECKPOINT( bdb->bi_dbenv,
+                               bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
+               }
+       }
+
        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 );
        }
 
-       if( rs->sr_err == LDAP_SUCCESS && bdb->bi_txn_cp ) {
-               TXN_CHECKPOINT( bdb->bi_dbenv,
-                       bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
-       }
        return rs->sr_err;
 }