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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/* id2entry.c - routines to deal with the id2entry index */
#include "back-ldbm.h"
/*
* The caller MUST check for DB_LOCK_DEADLOCK and DB_RUNRECOVERY returned
*/
int
id2entry_add_ext( backend *be, struct backentry *e, back_txn *txn, int encrypt )
{
ldbm_instance *inst = (ldbm_instance *) be->be_instance_info;
DB *db = NULL;
DB_TXN *db_txn = NULL;
DBT data = {0};
DBT key = {0};
int len, rc;
char temp_id[sizeof(ID)];
struct backentry *encrypted_entry = NULL;
LDAPDebug( LDAP_DEBUG_TRACE, "=> id2entry_add( %lu, \"%s\" )\n",
(u_long)e->ep_id, backentry_get_ndn(e), 0 );
if ( (rc = dblayer_get_id2entry( be, &db )) != 0 ) {
LDAPDebug( LDAP_DEBUG_ANY, "Could not open/create id2entry\n",
0, 0, 0 );
return( -1 );
}
id_internal_to_stored(e->ep_id,temp_id);
key.dptr = temp_id;
key.dsize = sizeof(temp_id);
/* Encrypt attributes in this entry if necessary */
if (encrypt) {
rc = attrcrypt_encrypt_entry(be, e, &encrypted_entry);
if (rc) {
LDAPDebug( LDAP_DEBUG_ANY, "attrcrypt_encrypt_entry failed in id2entry_add\n",
0, 0, 0 );
return ( -1 );
}
}
{
Slapi_Entry *entry_to_use = encrypted_entry ? encrypted_entry->ep_entry : e->ep_entry;
data.dptr = slapi_entry2str_with_options( entry_to_use, &len, SLAPI_DUMP_STATEINFO | SLAPI_DUMP_UNIQUEID);
data.dsize = len + 1;
/* If we had an encrypted entry, we no longer need it */
if (encrypted_entry) {
backentry_free(&encrypted_entry);
}
}
if (NULL != txn) {
db_txn = txn->back_txn_txn;
}
/* call pre-entry-store plugin */
plugin_call_entrystore_plugins( (char **) &data.dptr, &data.dsize );
/* store it */
rc = db->put( db, db_txn, &key, &data, 0);
/* DBDB looks like we're freeing memory allocated by another DLL, which is bad */
free( data.dptr );
dblayer_release_id2entry( be, db );
if (0 == rc)
{
/* DBDB the fact that we don't check the return code here is
* indicitive that there may be a latent race condition lurking
* ---what happens if the entry is already in the cache by this point?
*/
/*
* For ldbm_back_add and ldbm_back_modify, this entry had been already
* reserved as a tentative entry. So, it should be safe.
* For ldbm_back_modify, the original entry having the same dn/id
* should be in the cache. Thus, this entry e won't be put into the
* entry cache. It'll be added by cache_replace.
*/
(void) cache_add( &inst->inst_cache, e, NULL );
}
LDAPDebug( LDAP_DEBUG_TRACE, "<= id2entry_add %d\n", rc, 0, 0 );
return( rc );
}
int
id2entry_add( backend *be, struct backentry *e, back_txn *txn )
{
return id2entry_add_ext(be,e,txn,1);
}
/*
* The caller MUST check for DB_LOCK_DEADLOCK and DB_RUNRECOVERY returned
*/
int
id2entry_delete( backend *be, struct backentry *e, back_txn *txn )
{
DB *db = NULL;
DB_TXN *db_txn = NULL;
DBT key = {0};
int rc;
char temp_id[sizeof(ID)];
LDAPDebug( LDAP_DEBUG_TRACE, "=> id2entry_delete( %lu, \"%s\" )\n",
(u_long)e->ep_id, backentry_get_ndn(e), 0 );
if ( (rc = dblayer_get_id2entry( be, &db )) != 0 ) {
LDAPDebug( LDAP_DEBUG_ANY, "Could not open/create id2entry\n",
0, 0, 0 );
return( -1 );
}
id_internal_to_stored(e->ep_id,temp_id);
key.dptr = temp_id;
key.dsize = sizeof(temp_id);
if (NULL != txn) {
db_txn = txn->back_txn_txn;
}
rc = db->del( db,db_txn,&key,0 );
dblayer_release_id2entry( be, db );
LDAPDebug( LDAP_DEBUG_TRACE, "<= id2entry_delete %d\n", rc, 0, 0 );
return( rc );
}
struct backentry *
id2entry( backend *be, ID id, back_txn *txn, int *err )
{
ldbm_instance *inst = (ldbm_instance *) be->be_instance_info;
DB *db = NULL;
DB_TXN *db_txn = NULL;
DBT key = {0};
DBT data = {0};
struct backentry *e;
Slapi_Entry *ee;
char temp_id[sizeof(ID)];
LDAPDebug( LDAP_DEBUG_TRACE, "=> id2entry( %lu )\n", (u_long)id, 0, 0 );
if ( (e = cache_find_id( &inst->inst_cache, id )) != NULL ) {
LDAPDebug( LDAP_DEBUG_TRACE, "<= id2entry %p (cache)\n", e, 0,
0 );
return( e );
}
if ( (*err = dblayer_get_id2entry( be, &db )) != 0 ) {
LDAPDebug( LDAP_DEBUG_ANY, "Could not open id2entry err %d\n",
*err, 0, 0 );
return( NULL );
}
id_internal_to_stored(id,temp_id);
key.data = temp_id;
key.size = sizeof(temp_id);
/* DBDB need to improve this, we're mallocing, freeing, all over the place here */
data.flags = DB_DBT_MALLOC;
if (NULL != txn) {
db_txn = txn->back_txn_txn;
}
do {
*err = db->get( db, db_txn, &key, &data, 0 );
if ( 0 != *err &&
DB_NOTFOUND != *err && DB_LOCK_DEADLOCK != *err )
{
LDAPDebug( LDAP_DEBUG_ANY, "id2entry error %d\n",
*err, 0, 0 );
}
}
while ( DB_LOCK_DEADLOCK == *err && txn == NULL );
if ( 0 != *err && DB_NOTFOUND != *err && DB_LOCK_DEADLOCK != *err )
{
LDAPDebug( LDAP_DEBUG_ANY, "id2entry get error %d\n",
*err, 0, 0 );
dblayer_release_id2entry( be, db );
return( NULL );
}
if ( data.dptr == NULL ) {
LDAPDebug( LDAP_DEBUG_TRACE, "<= id2entry( %lu ) not found\n",
(u_long)id, 0, 0 );
dblayer_release_id2entry( be, db );
return( NULL );
}
/* call post-entry plugin */
plugin_call_entryfetch_plugins( (char **) &data.dptr, &data.dsize );
if ( (ee = slapi_str2entry( data.dptr, 0 )) != NULL ) {
int retval = 0;
struct backentry *imposter = NULL;
PR_ASSERT(slapi_entry_get_uniqueid(ee) != NULL); /* All entries should have uniqueids */
e = backentry_init( ee ); /* ownership of the entry is passed into the backentry */
e->ep_id = id;
/* Decrypt any encrypted attributes in this entry, before adding it to the cache */
retval = attrcrypt_decrypt_entry(be, e);
if (retval) {
LDAPDebug( LDAP_DEBUG_ANY, "attrcrypt_decrypt_entry failed in id2entry\n",
0, 0, 0 );
}
retval = cache_add( &inst->inst_cache, e, &imposter );
if (1 == retval) {
/* This means that someone else put the entry in the cache
while we weren't looking ! So, we need to use the pointer
returned and free the one we made earlier */
if (imposter)
{
backentry_free(&e);
e = imposter;
}
} else if (-1 == retval) {
/* the entry is in idtable but not in dntable, i.e., the entry
* could have been renamed */
LDAPDebug( LDAP_DEBUG_TRACE,
"id2entry: failed to put entry (id %lu, dn %s) into entry cache\n",
(u_long)id, backentry_get_ndn(e), 0 );
}
} else {
LDAPDebug( LDAP_DEBUG_ANY, "str2entry returned NULL for id %lu, string=\"%s\"\n", (u_long)id, (char*)data.data, 0);
e = NULL;
}
free( data.data );
dblayer_release_id2entry( be, db );
LDAPDebug( LDAP_DEBUG_TRACE, "<= id2entry( %lu ) %p (disk)\n", (u_long)id, e,
0 );
return( e );
}
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