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-rw-r--r--servers/slapd/back-monitor/thread.c351
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diff --git a/servers/slapd/back-monitor/thread.c b/servers/slapd/back-monitor/thread.c
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+++ b/servers/slapd/back-monitor/thread.c
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+/* thread.c - deal with thread subsystem */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2001-2022 The OpenLDAP Foundation.
+ * Portions Copyright 2001-2003 Pierangelo Masarati.
+ * 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 file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Pierangelo Masarati for inclusion
+ * in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "slap.h"
+#include "back-monitor.h"
+
+#include <ldap_rq.h>
+
+typedef enum {
+ MT_UNKNOWN,
+ MT_RUNQUEUE,
+ MT_TASKLIST,
+
+ MT_LAST
+} monitor_thread_t;
+
+static struct {
+ struct berval rdn;
+ struct berval desc;
+ struct berval nrdn;
+ ldap_pvt_thread_pool_param_t param;
+ monitor_thread_t mt;
+} mt[] = {
+ { BER_BVC( "cn=Max" ),
+ BER_BVC("Maximum number of threads as configured"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_MAX, MT_UNKNOWN },
+ { BER_BVC( "cn=Max Pending" ),
+ BER_BVC("Maximum number of pending threads"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_MAX_PENDING, MT_UNKNOWN },
+ { BER_BVC( "cn=Open" ),
+ BER_BVC("Number of open threads"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_OPEN, MT_UNKNOWN },
+ { BER_BVC( "cn=Starting" ),
+ BER_BVC("Number of threads being started"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_STARTING, MT_UNKNOWN },
+ { BER_BVC( "cn=Active" ),
+ BER_BVC("Number of active threads"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_ACTIVE, MT_UNKNOWN },
+ { BER_BVC( "cn=Pending" ),
+ BER_BVC("Number of pending threads"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_PENDING, MT_UNKNOWN },
+ { BER_BVC( "cn=Backload" ),
+ BER_BVC("Number of active plus pending threads"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_BACKLOAD, MT_UNKNOWN },
+#if 0 /* not meaningful right now */
+ { BER_BVC( "cn=Active Max" ),
+ BER_BVNULL,
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_ACTIVE_MAX, MT_UNKNOWN },
+ { BER_BVC( "cn=Pending Max" ),
+ BER_BVNULL,
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_PENDING_MAX, MT_UNKNOWN },
+ { BER_BVC( "cn=Backload Max" ),
+ BER_BVNULL,
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_BACKLOAD_MAX,MT_UNKNOWN },
+#endif
+ { BER_BVC( "cn=State" ),
+ BER_BVC("Thread pool state"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_STATE, MT_UNKNOWN },
+
+ { BER_BVC( "cn=Runqueue" ),
+ BER_BVC("Queue of running threads - besides those handling operations"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_UNKNOWN, MT_RUNQUEUE },
+ { BER_BVC( "cn=Tasklist" ),
+ BER_BVC("List of running plus standby threads - besides those handling operations"),
+ BER_BVNULL, LDAP_PVT_THREAD_POOL_PARAM_UNKNOWN, MT_TASKLIST },
+
+ { BER_BVNULL }
+};
+
+static int
+monitor_subsys_thread_update(
+ Operation *op,
+ SlapReply *rs,
+ Entry *e );
+
+/*
+ * initializes log subentry
+ */
+int
+monitor_subsys_thread_init(
+ BackendDB *be,
+ monitor_subsys_t *ms )
+{
+ monitor_info_t *mi;
+ monitor_entry_t *mp;
+ Entry *e, **ep, *e_thread;
+ int i;
+
+ ms->mss_update = monitor_subsys_thread_update;
+
+ mi = ( monitor_info_t * )be->be_private;
+
+ if ( monitor_cache_get( mi, &ms->mss_ndn, &e_thread ) ) {
+ Debug( LDAP_DEBUG_ANY,
+ "monitor_subsys_thread_init: unable to get entry \"%s\"\n",
+ ms->mss_dn.bv_val );
+ return( -1 );
+ }
+
+ mp = ( monitor_entry_t * )e_thread->e_private;
+ mp->mp_children = NULL;
+ ep = &mp->mp_children;
+
+ for ( i = 0; !BER_BVISNULL( &mt[ i ].rdn ); i++ ) {
+ static char buf[ BACKMONITOR_BUFSIZE ];
+ int count = -1;
+ char *state = NULL;
+ struct berval bv = BER_BVNULL;
+
+ /*
+ * Max
+ */
+ e = monitor_entry_stub( &ms->mss_dn, &ms->mss_ndn,
+ &mt[ i ].rdn,
+ mi->mi_oc_monitoredObject, NULL, NULL );
+ if ( e == NULL ) {
+ Debug( LDAP_DEBUG_ANY,
+ "monitor_subsys_thread_init: "
+ "unable to create entry \"%s,%s\"\n",
+ mt[ i ].rdn.bv_val,
+ ms->mss_ndn.bv_val );
+ return( -1 );
+ }
+
+ /* NOTE: reference to the normalized DN of the entry,
+ * under the assumption it's not modified */
+ dnRdn( &e->e_nname, &mt[ i ].nrdn );
+
+ switch ( mt[ i ].param ) {
+ case LDAP_PVT_THREAD_POOL_PARAM_UNKNOWN:
+ break;
+
+ case LDAP_PVT_THREAD_POOL_PARAM_STATE:
+ if ( ldap_pvt_thread_pool_query( &connection_pool,
+ mt[ i ].param, (void *)&state ) == 0 )
+ {
+ ber_str2bv( state, 0, 0, &bv );
+
+ } else {
+ BER_BVSTR( &bv, "unknown" );
+ }
+ break;
+
+ default:
+ /* NOTE: in case of error, it'll be set to -1 */
+ (void)ldap_pvt_thread_pool_query( &connection_pool,
+ mt[ i ].param, (void *)&count );
+ bv.bv_val = buf;
+ bv.bv_len = snprintf( buf, sizeof( buf ), "%d", count );
+ break;
+ }
+
+ if ( !BER_BVISNULL( &bv ) ) {
+ attr_merge_normalize_one( e, mi->mi_ad_monitoredInfo, &bv, NULL );
+ }
+
+ if ( !BER_BVISNULL( &mt[ i ].desc ) ) {
+ attr_merge_normalize_one( e,
+ slap_schema.si_ad_description,
+ &mt[ i ].desc, NULL );
+ }
+
+ mp = monitor_entrypriv_create();
+ if ( mp == NULL ) {
+ return -1;
+ }
+ e->e_private = ( void * )mp;
+ mp->mp_info = ms;
+ mp->mp_flags = ms->mss_flags \
+ | MONITOR_F_SUB | MONITOR_F_PERSISTENT;
+
+ if ( monitor_cache_add( mi, e ) ) {
+ Debug( LDAP_DEBUG_ANY,
+ "monitor_subsys_thread_init: "
+ "unable to add entry \"%s,%s\"\n",
+ mt[ i ].rdn.bv_val,
+ ms->mss_dn.bv_val );
+ return( -1 );
+ }
+
+ *ep = e;
+ ep = &mp->mp_next;
+ }
+
+ monitor_cache_release( mi, e_thread );
+
+ return( 0 );
+}
+
+static int
+monitor_subsys_thread_update(
+ Operation *op,
+ SlapReply *rs,
+ Entry *e )
+{
+ monitor_info_t *mi = ( monitor_info_t * )op->o_bd->be_private;
+ Attribute *a;
+ BerVarray vals = NULL;
+ char buf[ BACKMONITOR_BUFSIZE ];
+ struct berval rdn, bv;
+ int which, i;
+ struct re_s *re;
+ int count = -1;
+ char *state = NULL;
+
+ assert( mi != NULL );
+
+ dnRdn( &e->e_nname, &rdn );
+
+ for ( i = 0; !BER_BVISNULL( &mt[ i ].nrdn ); i++ ) {
+ if ( dn_match( &mt[ i ].nrdn, &rdn ) ) {
+ break;
+ }
+ }
+
+ which = i;
+ if ( BER_BVISNULL( &mt[ which ].nrdn ) ) {
+ return SLAP_CB_CONTINUE;
+ }
+
+ a = attr_find( e->e_attrs, mi->mi_ad_monitoredInfo );
+
+ switch ( mt[ which ].param ) {
+ case LDAP_PVT_THREAD_POOL_PARAM_UNKNOWN:
+ switch ( mt[ which ].mt ) {
+ case MT_RUNQUEUE:
+ if ( a != NULL ) {
+ if ( a->a_nvals != a->a_vals ) {
+ ber_bvarray_free( a->a_nvals );
+ }
+ ber_bvarray_free( a->a_vals );
+ a->a_vals = NULL;
+ a->a_nvals = NULL;
+ a->a_numvals = 0;
+ }
+
+ i = 0;
+ bv.bv_val = buf;
+ ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+ LDAP_STAILQ_FOREACH( re, &slapd_rq.run_list, rnext ) {
+ bv.bv_len = snprintf( buf, sizeof( buf ), "{%d}%s(%s)",
+ i, re->tname, re->tspec );
+ if ( bv.bv_len < sizeof( buf ) ) {
+ value_add_one( &vals, &bv );
+ }
+ i++;
+ }
+ ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+
+ if ( vals ) {
+ attr_merge_normalize( e, mi->mi_ad_monitoredInfo, vals, NULL );
+ ber_bvarray_free( vals );
+
+ } else {
+ attr_delete( &e->e_attrs, mi->mi_ad_monitoredInfo );
+ }
+ break;
+
+ case MT_TASKLIST:
+ if ( a != NULL ) {
+ if ( a->a_nvals != a->a_vals ) {
+ ber_bvarray_free( a->a_nvals );
+ }
+ ber_bvarray_free( a->a_vals );
+ a->a_vals = NULL;
+ a->a_nvals = NULL;
+ a->a_numvals = 0;
+ }
+
+ i = 0;
+ bv.bv_val = buf;
+ ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
+ LDAP_STAILQ_FOREACH( re, &slapd_rq.task_list, tnext ) {
+ bv.bv_len = snprintf( buf, sizeof( buf ), "{%d}%s(%s)",
+ i, re->tname, re->tspec );
+ if ( bv.bv_len < sizeof( buf ) ) {
+ value_add_one( &vals, &bv );
+ }
+ i++;
+ }
+ ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
+
+ if ( vals ) {
+ attr_merge_normalize( e, mi->mi_ad_monitoredInfo, vals, NULL );
+ ber_bvarray_free( vals );
+
+ } else {
+ attr_delete( &e->e_attrs, mi->mi_ad_monitoredInfo );
+ }
+ break;
+
+ default:
+ assert( 0 );
+ }
+ break;
+
+ case LDAP_PVT_THREAD_POOL_PARAM_STATE:
+ if ( a == NULL ) {
+ return rs->sr_err = LDAP_OTHER;
+ }
+ if ( ldap_pvt_thread_pool_query( &connection_pool,
+ mt[ i ].param, (void *)&state ) == 0 )
+ {
+ ber_str2bv( state, 0, 0, &bv );
+ ber_bvreplace( &a->a_vals[ 0 ], &bv );
+ }
+ break;
+
+ default:
+ if ( a == NULL ) {
+ return rs->sr_err = LDAP_OTHER;
+ }
+ if ( ldap_pvt_thread_pool_query( &connection_pool,
+ mt[ i ].param, (void *)&count ) == 0 )
+ {
+ bv.bv_val = buf;
+ bv.bv_len = snprintf( buf, sizeof( buf ), "%d", count );
+ if ( bv.bv_len < sizeof( buf ) ) {
+ ber_bvreplace( &a->a_vals[ 0 ], &bv );
+ }
+ }
+ break;
+ }
+
+ /* FIXME: touch modifyTimestamp? */
+
+ return SLAP_CB_CONTINUE;
+}
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