]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/back-bdb/init.c
Reworked recent backend API changes, now using a separate struct,
[openldap] / servers / slapd / back-bdb / init.c
index 8030dba021767c9ae542c88e9a0de72a0011df09..4b5f012335680ce0b15eeeceaa1501cfab4fa4db 100644 (file)
@@ -26,6 +26,7 @@
 #include <lutil.h>
 #include <ldap_rq.h>
 #include "alock.h"
+#include "config.h"
 
 static const struct bdbi_database {
        char *file;
@@ -41,8 +42,12 @@ static const struct bdbi_database {
 typedef void * db_malloc(size_t);
 typedef void * db_realloc(void *, size_t);
 
+#define bdb_db_init    BDB_SYMBOL(db_init)
+#define bdb_db_open BDB_SYMBOL(db_open)
+#define bdb_db_close BDB_SYMBOL(db_close)
+
 static int
-bdb_db_init( BackendDB *be )
+bdb_db_init( BackendDB *be, ConfigReply *cr )
 {
        struct bdb_info *bdb;
        int rc;
@@ -71,8 +76,7 @@ bdb_db_init( BackendDB *be )
 #ifdef BDB_HIER
        ldap_pvt_thread_mutex_init( &bdb->bi_modrdns_mutex );
 #endif
-       ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_head_mutex );
-       ldap_pvt_thread_mutex_init( &bdb->bi_cache.lru_tail_mutex );
+       ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_lru_mutex );
        ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_count_mutex );
        ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_eifree_mutex );
        ldap_pvt_thread_mutex_init( &bdb->bi_cache.c_dntree.bei_kids_mutex );
@@ -80,6 +84,7 @@ bdb_db_init( BackendDB *be )
        ldap_pvt_thread_rdwr_init( &bdb->bi_idl_tree_rwlock );
        ldap_pvt_thread_mutex_init( &bdb->bi_idl_tree_lrulock );
 
+
        be->be_private = bdb;
        be->be_cf_ocs = be->bd_info->bi_cf_ocs;
 
@@ -89,10 +94,10 @@ bdb_db_init( BackendDB *be )
 }
 
 static int
-bdb_db_close( BackendDB *be );
+bdb_db_close( BackendDB *be, ConfigReply *cr );
 
 static int
-bdb_db_open( BackendDB *be )
+bdb_db_open( BackendDB *be, ConfigReply *cr )
 {
        int rc, i;
        struct bdb_info *bdb = (struct bdb_info *) be->be_private;
@@ -100,24 +105,28 @@ bdb_db_open( BackendDB *be )
        u_int32_t flags;
        char path[MAXPATHLEN];
        char *dbhome;
+       Entry *e = NULL;
        int do_recover = 0, do_alock_recover = 0;
        int alockt, quick = 0;
 
        if ( be->be_suffix == NULL ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: need suffix\n",
-                       0, 0, 0 );
+                       LDAP_XSTRING(bdb_db_open) ": need suffix\n",
+                       1, 0, 0 );
                return -1;
        }
 
        Debug( LDAP_DEBUG_ARGS,
-               "bdb_db_open: %s\n",
+               LDAP_XSTRING(bdb_db_open) ": %s\n",
                be->be_suffix[0].bv_val, 0, 0 );
 
 #ifndef BDB_MULTIPLE_SUFFIXES
        if ( be->be_suffix[1].bv_val ) {
-       Debug( LDAP_DEBUG_ANY,
-               "bdb_db_open: only one suffix allowed\n", 0, 0, 0 );
+               if (cr) {
+                       snprintf(cr->msg, sizeof(cr->msg), "only one suffix allowed");
+                       Debug( LDAP_DEBUG_ANY,
+                               LDAP_XSTRING(bdb_db_open) ": %s\n", cr->msg, 0, 0 );
+               }
                return -1;
        }
 #endif
@@ -126,9 +135,9 @@ bdb_db_open( BackendDB *be )
        rc = stat( bdb->bi_dbenv_home, &stat1 );
        if( rc !=0 ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: Cannot access database directory %s (%d)\n",
+                       LDAP_XSTRING(bdb_db_open) ": Cannot access database directory %s (%d)\n",
                        bdb->bi_dbenv_home, errno, 0 );
-                       return -1;
+               return -1;
        }
 
        /* Perform database use arbitration/recovery logic */
@@ -148,19 +157,19 @@ bdb_db_open( BackendDB *be )
 
        if( rc == ALOCK_RECOVER ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: unclean shutdown detected;"
+                       LDAP_XSTRING(bdb_db_open) ": unclean shutdown detected;"
                        " attempting recovery.\n", 
                        0, 0, 0 );
                do_alock_recover = 1;
                do_recover = DB_RECOVER;
        } else if( rc == ALOCK_BUSY ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: database already in use\n", 
+                       LDAP_XSTRING(bdb_db_open) ": database already in use\n", 
                        0, 0, 0 );
                return -1;
        } else if( rc != ALOCK_CLEAN ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: alock package is unstable\n", 
+                       LDAP_XSTRING(bdb_db_open) ": alock package is unstable\n", 
                        0, 0, 0 );
                return -1;
        }
@@ -178,7 +187,7 @@ bdb_db_open( BackendDB *be )
                        if( stat( path, &stat2 ) == 0 ) {
                                if( stat2.st_mtime < stat1.st_mtime ) {
                                        Debug( LDAP_DEBUG_ANY,
-                                               "bdb_db_open: DB_CONFIG for suffix %s has changed.\n"
+                                               LDAP_XSTRING(bdb_db_open) ": DB_CONFIG for suffix %s has changed.\n"
                                                "Performing database recovery to activate new settings.\n",
                                                be->be_suffix[0].bv_val, 0, 0 );
                                        do_recover = DB_RECOVER;
@@ -188,7 +197,7 @@ bdb_db_open( BackendDB *be )
        }
        else {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: Warning - No DB_CONFIG file found "
+                       LDAP_XSTRING(bdb_db_open) ": Warning - No DB_CONFIG file found "
                        "in directory %s: (%d)\n"
                        "Expect poor performance for suffix %s.\n",
                        bdb->bi_dbenv_home, errno, be->be_suffix[0].bv_val );
@@ -200,7 +209,7 @@ bdb_db_open( BackendDB *be )
         */
        if ( do_recover && ( slapMode & SLAP_TOOL_READONLY )) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: Recovery skipped in read-only mode. "
+                       LDAP_XSTRING(bdb_db_open) ": Recovery skipped in read-only mode. "
                        "Run manual recovery if errors are encountered.\n",
                        0, 0, 0 );
                do_recover = 0;
@@ -210,7 +219,7 @@ bdb_db_open( BackendDB *be )
        /* An existing environment in Quick mode has nothing to recover. */
        if ( alockt && do_recover ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: cannot recover, database must be reinitialized.\n", 
+                       LDAP_XSTRING(bdb_db_open) ": cannot recover, database must be reinitialized.\n", 
                        0, 0, 0 );
                rc = -1;
                goto fail;
@@ -219,7 +228,7 @@ bdb_db_open( BackendDB *be )
        rc = db_env_create( &bdb->bi_dbenv, 0 );
        if( rc != 0 ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: db_env_create failed: %s (%d)\n",
+                       LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
                        db_strerror(rc), rc, 0 );
                goto fail;
        }
@@ -236,10 +245,11 @@ bdb_db_open( BackendDB *be )
         * currently requested modes, remove it.
         */
        if ( !do_recover && ( alockt ^ quick )) {
+shm_retry:
                rc = bdb->bi_dbenv->remove( bdb->bi_dbenv, dbhome, DB_FORCE );
                if ( rc ) {
                        Debug( LDAP_DEBUG_ANY,
-                               "bdb_db_open: dbenv remove failed: %s (%d)\n",
+                               LDAP_XSTRING(bdb_db_open) ": dbenv remove failed: %s (%d)\n",
                                db_strerror(rc), rc, 0 );
                        bdb->bi_dbenv = NULL;
                        goto fail;
@@ -247,7 +257,7 @@ bdb_db_open( BackendDB *be )
                rc = db_env_create( &bdb->bi_dbenv, 0 );
                if( rc != 0 ) {
                        Debug( LDAP_DEBUG_ANY,
-                               "bdb_db_open: db_env_create failed: %s (%d)\n",
+                               LDAP_XSTRING(bdb_db_open) ": db_env_create failed: %s (%d)\n",
                                db_strerror(rc), rc, 0 );
                        goto fail;
                }
@@ -266,7 +276,7 @@ bdb_db_open( BackendDB *be )
                        bdb->bi_dbenv_xflags, 1);
                if( rc != 0 ) {
                        Debug( LDAP_DEBUG_ANY,
-                               "bdb_db_open: dbenv_set_flags failed: %s (%d)\n",
+                               LDAP_XSTRING(bdb_db_open) ": dbenv_set_flags failed: %s (%d)\n",
                                db_strerror(rc), rc, 0 );
                        goto fail;
                }
@@ -275,7 +285,7 @@ bdb_db_open( BackendDB *be )
 #define        BDB_TXN_FLAGS   (DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_TXN)
 
        Debug( LDAP_DEBUG_TRACE,
-               "bdb_db_open: dbenv_open(%s)\n",
+               LDAP_XSTRING(bdb_db_open) ": dbenv_open(%s)\n",
                bdb->bi_dbenv_home, 0, 0);
 
        flags = DB_INIT_MPOOL | DB_CREATE | DB_THREAD;
@@ -292,8 +302,21 @@ bdb_db_open( BackendDB *be )
                        flags | do_recover, bdb->bi_dbenv_mode );
 
        if ( rc ) {
+               /* Regular open faied, probably a missing shm environment.
+                * Start over, do a recovery.
+                */
+               if ( !do_recover && bdb->bi_shm_key ) {
+                       bdb->bi_dbenv->close( bdb->bi_dbenv, 0 );
+                       rc = db_env_create( &bdb->bi_dbenv, 0 );
+                       if( rc == 0 ) {
+                               Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(bdb_db_open)
+                                       ": Shared memory env open failed, assuming stale env\n",
+                                       0, 0, 0 );
+                               goto shm_retry;
+                       }
+               }
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: Database cannot be %s, err %d. "
+                       LDAP_XSTRING(bdb_db_open) ": Database cannot be %s, err %d. "
                        "Restore from backup!\n",
                                do_recover ? "recovered" : "opened", rc, 0);
                goto fail;
@@ -301,7 +324,7 @@ bdb_db_open( BackendDB *be )
 
        if ( do_alock_recover && alock_recover (&bdb->bi_alock_info) != 0 ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: alock_recover failed\n",
+                       LDAP_XSTRING(bdb_db_open) ": alock_recover failed\n",
                        0, 0, 0 );
                rc = -1;
                goto fail;
@@ -339,7 +362,7 @@ bdb_db_open( BackendDB *be )
                rc = db_create( &db->bdi_db, bdb->bi_dbenv, 0 );
                if( rc != 0 ) {
                        Debug( LDAP_DEBUG_ANY,
-                               "bdb_db_open: db_create(%s) failed: %s (%d)\n",
+                               LDAP_XSTRING(bdb_db_open) ": db_create(%s) failed: %s (%d)\n",
                                bdb->bi_dbenv_home, db_strerror(rc), rc );
                        goto fail;
                }
@@ -400,7 +423,7 @@ bdb_db_open( BackendDB *be )
                        snprintf( buf, sizeof(buf), "%s/%s", 
                                bdb->bi_dbenv_home, bdbi_databases[i].file );
                        Debug( LDAP_DEBUG_ANY,
-                               "bdb_db_open: db_open(%s) failed: %s (%d)\n",
+                               LDAP_XSTRING(bdb_db_open) ": db_open(%s) failed: %s (%d)\n",
                                buf, db_strerror(rc), rc );
                        db->bdi_db->close( db->bdi_db, 0 );
                        goto fail;
@@ -418,7 +441,7 @@ bdb_db_open( BackendDB *be )
        rc = bdb_last_id( be, NULL );
        if( rc != 0 ) {
                Debug( LDAP_DEBUG_ANY,
-                       "bdb_db_open: last_id(%s) failed: %s (%d)\n",
+                       LDAP_XSTRING(bdb_db_open) ": last_id(%s) failed: %s (%d)\n",
                        bdb->bi_dbenv_home, db_strerror(rc), rc );
                goto fail;
        }
@@ -427,6 +450,23 @@ bdb_db_open( BackendDB *be )
                XLOCK_ID(bdb->bi_dbenv, &bdb->bi_cache.c_locker);
        }
 
+       entry_prealloc( bdb->bi_cache.c_maxsize );
+       attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
+
+       /* setup for empty-DN contexts */
+       if ( BER_BVISEMPTY( &be->be_nsuffix[0] )) {
+               rc = bdb_id2entry( be, NULL, 0, 0, &e );
+       }
+       if ( !e ) {
+               e = entry_alloc();
+               e->e_id = 0;
+               ber_dupbv( &e->e_name, (struct berval *)&slap_empty_bv );
+               ber_dupbv( &e->e_nname, (struct berval *)&slap_empty_bv );
+       }
+       e->e_ocflags = SLAP_OC_GLUE|SLAP_OC__END;
+       e->e_private = &bdb->bi_cache.c_dntree;
+       bdb->bi_cache.c_dntree.bei_e = e;
+
        /* monitor setup */
        rc = bdb_monitor_db_open( be );
        if ( rc != 0 ) {
@@ -435,17 +475,15 @@ bdb_db_open( BackendDB *be )
 
        bdb->bi_flags |= BDB_IS_OPEN;
 
-       entry_prealloc( bdb->bi_cache.c_maxsize );
-       attr_prealloc( bdb->bi_cache.c_maxsize * 20 );
        return 0;
 
 fail:
-       bdb_db_close( be );
+       bdb_db_close( be, NULL );
        return rc;
 }
 
 static int
-bdb_db_close( BackendDB *be )
+bdb_db_close( BackendDB *be, ConfigReply *cr )
 {
        int rc;
        struct bdb_info *bdb = (struct bdb_info *) be->be_private;
@@ -455,6 +493,15 @@ bdb_db_close( BackendDB *be )
        /* monitor handling */
        (void)bdb_monitor_db_close( be );
 
+       {
+               Entry *e = bdb->bi_cache.c_dntree.bei_e;
+               if ( e ) {
+                       bdb->bi_cache.c_dntree.bei_e = NULL;
+                       e->e_private = NULL;
+                       bdb_entry_return( e );
+               }
+       }
+
        bdb->bi_flags &= ~BDB_IS_OPEN;
 
        ber_bvarray_free( bdb->bi_db_config );
@@ -495,7 +542,9 @@ bdb_db_close( BackendDB *be )
                        XLOCK_ID_FREE(bdb->bi_dbenv, bdb->bi_cache.c_locker);
                        bdb->bi_cache.c_locker = 0;
                }
-
+#ifdef BDB_REUSE_LOCKERS
+               bdb_locker_flush( bdb->bi_dbenv );
+#endif
                /* force a checkpoint, but not if we were ReadOnly,
                 * and not in Quick mode since there are no transactions there.
                 */
@@ -529,7 +578,7 @@ bdb_db_close( BackendDB *be )
 }
 
 static int
-bdb_db_destroy( BackendDB *be )
+bdb_db_destroy( BackendDB *be, ConfigReply *cr )
 {
        struct bdb_info *bdb = (struct bdb_info *) be->be_private;
 
@@ -542,8 +591,7 @@ bdb_db_destroy( BackendDB *be )
        bdb_attr_index_destroy( bdb );
 
        ldap_pvt_thread_rdwr_destroy ( &bdb->bi_cache.c_rwlock );
-       ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_head_mutex );
-       ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.lru_tail_mutex );
+       ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_lru_mutex );
        ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_count_mutex );
        ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_eifree_mutex );
        ldap_pvt_thread_mutex_destroy( &bdb->bi_cache.c_dntree.bei_kids_mutex );