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273 lines
6.7 KiB
C
273 lines
6.7 KiB
C
/* readw.c - deal with read waiters subsystem */
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/*
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* Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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/*
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* Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
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*
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* This work has beed deveolped for the OpenLDAP Foundation
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* in the hope that it may be useful to the Open Source community,
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* but WITHOUT ANY WARRANTY.
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*
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* Permission is granted to anyone to use this software for any purpose
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* on any computer system, and to alter it and redistribute it, subject
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* to the following restrictions:
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*
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* 1. The author and SysNet s.n.c. are not responsible for the consequences
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* of use of this software, no matter how awful, even if they arise from
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* flaws in it.
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*
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* 2. The origin of this software must not be misrepresented, either by
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* explicit claim or by omission. Since few users ever read sources,
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* credits should appear in the documentation.
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*
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* 3. Altered versions must be plainly marked as such, and must not be
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* misrepresented as being the original software. Since few users
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* ever read sources, credits should appear in the documentation.
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* SysNet s.n.c. cannot be responsible for the consequences of the
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* alterations.
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*
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* 4. This notice may not be removed or altered.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include "slap.h"
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#include "lutil.h"
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#include "back-monitor.h"
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int
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monitor_subsys_rww_init(
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BackendDB *be
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)
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{
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struct monitorinfo *mi;
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Entry *e, *e_tmp, *e_conn;
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struct monitorentrypriv *mp;
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char buf[1024];
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struct berval bv;
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assert( be != NULL );
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mi = ( struct monitorinfo * )be->be_private;
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if ( monitor_cache_get( mi,
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&monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn, &e_conn ) ) {
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#ifdef NEW_LOGGING
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LDAP_LOG( OPERATION, CRIT,
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"monitor_subsys_rww_init: "
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"unable to get entry '%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#else
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Debug( LDAP_DEBUG_ANY,
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"monitor_subsys_rww_init: "
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"unable to get entry '%s'\n%s%s",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val,
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"", "" );
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#endif
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return( -1 );
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}
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e_tmp = NULL;
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/*
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* Total conns
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*/
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snprintf( buf, sizeof( buf ),
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"dn: cn=Read,%s\n"
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"objectClass: %s\n"
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"structuralObjectClass: %s\n"
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"cn: Read\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_dn.bv_val,
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mi->oc_monitorCounterObject->soc_cname.bv_val,
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mi->oc_monitorCounterObject->soc_cname.bv_val );
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e = str2entry( buf );
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if ( e == NULL ) {
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#ifdef NEW_LOGGING
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LDAP_LOG( OPERATION, CRIT,
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"monitor_subsys_rww_init: "
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"unable to create entry 'cn=Read,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#else
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Debug( LDAP_DEBUG_ANY,
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"monitor_subsys_rww_init: "
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"unable to create entry 'cn=Read,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#endif
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return( -1 );
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}
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bv.bv_val = "0";
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bv.bv_len = 1;
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attr_merge_one( e, mi->ad_monitorCounter, &bv, NULL );
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mp = ( struct monitorentrypriv * )ch_calloc( sizeof( struct monitorentrypriv ), 1 );
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e->e_private = ( void * )mp;
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mp->mp_next = e_tmp;
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mp->mp_children = NULL;
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mp->mp_info = &monitor_subsys[SLAPD_MONITOR_RWW];
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mp->mp_flags = monitor_subsys[SLAPD_MONITOR_RWW].mss_flags \
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| MONITOR_F_SUB | MONITOR_F_PERSISTENT;
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if ( monitor_cache_add( mi, e ) ) {
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#ifdef NEW_LOGGING
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LDAP_LOG( OPERATION, CRIT,
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"monitor_subsys_rww_init: "
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"unable to add entry 'cn=Read,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#else
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Debug( LDAP_DEBUG_ANY,
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"monitor_subsys_rww_init: "
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"unable to add entry 'cn=Read,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#endif
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return( -1 );
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}
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e_tmp = e;
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/*
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* Current conns
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*/
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snprintf( buf, sizeof( buf ),
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"dn: cn=Write,%s\n"
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"objectClass: %s\n"
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"structuralObjectClass: %s\n"
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"cn: Write\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_dn.bv_val,
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mi->oc_monitorCounterObject->soc_cname.bv_val,
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mi->oc_monitorCounterObject->soc_cname.bv_val );
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e = str2entry( buf );
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if ( e == NULL ) {
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#ifdef NEW_LOGGING
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LDAP_LOG( OPERATION, CRIT,
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"monitor_subsys_rww_init: "
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"unable to create entry 'cn=Write,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#else
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Debug( LDAP_DEBUG_ANY,
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"monitor_subsys_rww_init: "
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"unable to create entry 'cn=Write,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#endif
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return( -1 );
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}
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bv.bv_val = "0";
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bv.bv_len = 1;
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attr_merge_one( e, mi->ad_monitorCounter, &bv, NULL );
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mp = ( struct monitorentrypriv * )ch_calloc( sizeof( struct monitorentrypriv ), 1 );
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e->e_private = ( void * )mp;
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mp->mp_next = e_tmp;
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mp->mp_children = NULL;
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mp->mp_info = &monitor_subsys[SLAPD_MONITOR_RWW];
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mp->mp_flags = monitor_subsys[SLAPD_MONITOR_RWW].mss_flags \
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| MONITOR_F_SUB | MONITOR_F_PERSISTENT;
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if ( monitor_cache_add( mi, e ) ) {
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#ifdef NEW_LOGGING
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LDAP_LOG( OPERATION, CRIT,
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"monitor_subsys_rww_init: "
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"unable to add entry 'cn=Write,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#else
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Debug( LDAP_DEBUG_ANY,
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"monitor_subsys_rww_init: "
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"unable to add entry 'cn=Write,%s'\n",
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monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
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#endif
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return( -1 );
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}
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e_tmp = e;
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mp = ( struct monitorentrypriv * )e_conn->e_private;
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mp->mp_children = e_tmp;
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monitor_cache_release( mi, e_conn );
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return( 0 );
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}
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int
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monitor_subsys_rww_update(
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Operation *op,
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Entry *e
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)
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{
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struct monitorinfo *mi = (struct monitorinfo *)op->o_bd->be_private;
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Connection *c;
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int connindex;
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long nconns, nwritewaiters, nreadwaiters;
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#define RWW_NONE 0
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#define RWW_READ 1
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#define RWW_WRITE 2
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int type = RWW_NONE;
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Attribute *a;
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struct berval *b = NULL;
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char buf[] = "+9223372036854775807L";
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char *str = NULL;
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long num = 0;
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assert( mi != NULL );
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assert( e != NULL );
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if ( strncasecmp( e->e_ndn, "cn=read",
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sizeof("cn=read")-1 ) == 0 ) {
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type = RWW_READ;
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} else if ( strncasecmp( e->e_ndn, "cn=write",
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sizeof("cn=write")-1 ) == 0 ) {
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type = RWW_WRITE;
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} else {
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return( 0 );
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}
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nconns = nwritewaiters = nreadwaiters = 0;
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for ( c = connection_first( &connindex );
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c != NULL;
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c = connection_next( c, &connindex ), nconns++ ) {
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if ( c->c_writewaiter ) {
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nwritewaiters++;
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}
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if ( c->c_currentber != NULL ) {
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nreadwaiters++;
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}
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}
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connection_done(c);
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switch ( type ) {
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case RWW_READ:
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num = nreadwaiters;
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break;
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case RWW_WRITE:
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num = nwritewaiters;
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break;
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default:
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assert( 0 );
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}
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snprintf( buf, sizeof( buf ), "%ld", num );
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a = attr_find( e->e_attrs, mi->ad_monitorCounter );
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assert( a );
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free( a->a_vals[0].bv_val );
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ber_str2bv( buf, 0, 1, &a->a_vals[ 0 ] );
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return( 0 );
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}
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