git.sur5r.net Git - openldap/blob - servers/slapd/back-monitor/rww.c

   1 /* readw.c - deal with read waiters subsystem */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2001-2004 The OpenLDAP Foundation.
   6  * Portions Copyright 2001-2003 Pierangelo Masarati.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by Pierangelo Masarati for inclusion
  19  * in OpenLDAP Software.
  20  */
  21
  22 #include "portable.h"
  23
  24 #include <stdio.h>
  25 #include <ac/string.h>
  26
  27 #include "slap.h"
  28 #include "lutil.h"
  29 #include "back-monitor.h"
  30
  31 int
  32 monitor_subsys_rww_init(
  33         BackendDB               *be
  34 )
  35 {
  36         struct monitorinfo      *mi;
  37
  38         Entry                   *e, *e_tmp, *e_conn;
  39         struct monitorentrypriv *mp;
  40         char                    buf[ BACKMONITOR_BUFSIZE ];
  41         struct berval           bv;
  42
  43         assert( be != NULL );
  44
  45         mi = ( struct monitorinfo * )be->be_private;
  46
  47         if ( monitor_cache_get( mi,
  48                         &monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn, &e_conn ) ) {
  49 #ifdef NEW_LOGGING
  50                 LDAP_LOG( OPERATION, CRIT,
  51                         "monitor_subsys_rww_init: "
  52                         "unable to get entry '%s'\n",
  53                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
  54 #else
  55                 Debug( LDAP_DEBUG_ANY,
  56                         "monitor_subsys_rww_init: "
  57                         "unable to get entry '%s'\n%s%s",
  58                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val,
  59                         "", "" );
  60 #endif
  61                 return( -1 );
  62         }
  63
  64         e_tmp = NULL;
  65
  66         /*
  67          * Total conns
  68          */
  69         snprintf( buf, sizeof( buf ),
  70                 "dn: cn=Read,%s\n"
  71                 "objectClass: %s\n"
  72                 "structuralObjectClass: %s\n"
  73                 "cn: Read\n"
  74                 "creatorsName: %s\n"
  75                 "modifiersName: %s\n"
  76                 "createTimestamp: %s\n"
  77                 "modifyTimestamp: %s\n",
  78                 monitor_subsys[SLAPD_MONITOR_RWW].mss_dn.bv_val,
  79                 mi->mi_oc_monitorCounterObject->soc_cname.bv_val,
  80                 mi->mi_oc_monitorCounterObject->soc_cname.bv_val,
  81                 mi->mi_creatorsName.bv_val,
  82                 mi->mi_creatorsName.bv_val,
  83                 mi->mi_startTime.bv_val,
  84                 mi->mi_startTime.bv_val );
  85
  86         e = str2entry( buf );
  87         if ( e == NULL ) {
  88 #ifdef NEW_LOGGING
  89                 LDAP_LOG( OPERATION, CRIT,
  90                         "monitor_subsys_rww_init: "
  91                         "unable to create entry 'cn=Read,%s'\n",
  92                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
  93 #else
  94                 Debug( LDAP_DEBUG_ANY,
  95                         "monitor_subsys_rww_init: "
  96                         "unable to create entry 'cn=Read,%s'\n",
  97                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
  98 #endif
  99                 return( -1 );
 100         }
 101
 102         bv.bv_val = "0";
 103         bv.bv_len = 1;
 104         attr_merge_one( e, mi->mi_ad_monitorCounter, &bv, NULL );
 105
 106         mp = ( struct monitorentrypriv * )ch_calloc( sizeof( struct monitorentrypriv ), 1 );
 107         e->e_private = ( void * )mp;
 108         mp->mp_next = e_tmp;
 109         mp->mp_children = NULL;
 110         mp->mp_info = &monitor_subsys[SLAPD_MONITOR_RWW];
 111         mp->mp_flags = monitor_subsys[SLAPD_MONITOR_RWW].mss_flags \
 112                 | MONITOR_F_SUB | MONITOR_F_PERSISTENT;
 113
 114         if ( monitor_cache_add( mi, e ) ) {
 115 #ifdef NEW_LOGGING
 116                 LDAP_LOG( OPERATION, CRIT,
 117                         "monitor_subsys_rww_init: "
 118                         "unable to add entry 'cn=Read,%s'\n",
 119                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
 120 #else
 121                 Debug( LDAP_DEBUG_ANY,
 122                         "monitor_subsys_rww_init: "
 123                         "unable to add entry 'cn=Read,%s'\n",
 124                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
 125 #endif
 126                 return( -1 );
 127         }
 128
 129         e_tmp = e;
 130
 131         /*
 132          * Current conns
 133          */
 134         snprintf( buf, sizeof( buf ),
 135                         "dn: cn=Write,%s\n"
 136                         "objectClass: %s\n"
 137                         "structuralObjectClass: %s\n"
 138                         "cn: Write\n"
 139                         "creatorsName: %s\n"
 140                         "modifiersName: %s\n"
 141                         "createTimestamp: %s\n"
 142                         "modifyTimestamp: %s\n",
 143                         monitor_subsys[SLAPD_MONITOR_RWW].mss_dn.bv_val,
 144                         mi->mi_oc_monitorCounterObject->soc_cname.bv_val,
 145                         mi->mi_oc_monitorCounterObject->soc_cname.bv_val,
 146                         mi->mi_creatorsName.bv_val,
 147                         mi->mi_creatorsName.bv_val,
 148                         mi->mi_startTime.bv_val,
 149                         mi->mi_startTime.bv_val );
 150
 151         e = str2entry( buf );
 152         if ( e == NULL ) {
 153 #ifdef NEW_LOGGING
 154                 LDAP_LOG( OPERATION, CRIT,
 155                         "monitor_subsys_rww_init: "
 156                         "unable to create entry 'cn=Write,%s'\n",
 157                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
 158 #else
 159                 Debug( LDAP_DEBUG_ANY,
 160                         "monitor_subsys_rww_init: "
 161                         "unable to create entry 'cn=Write,%s'\n",
 162                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
 163 #endif
 164                 return( -1 );
 165         }
 166
 167         bv.bv_val = "0";
 168         bv.bv_len = 1;
 169         attr_merge_one( e, mi->mi_ad_monitorCounter, &bv, NULL );
 170
 171         mp = ( struct monitorentrypriv * )ch_calloc( sizeof( struct monitorentrypriv ), 1 );
 172         e->e_private = ( void * )mp;
 173         mp->mp_next = e_tmp;
 174         mp->mp_children = NULL;
 175         mp->mp_info = &monitor_subsys[SLAPD_MONITOR_RWW];
 176         mp->mp_flags = monitor_subsys[SLAPD_MONITOR_RWW].mss_flags \
 177                 | MONITOR_F_SUB | MONITOR_F_PERSISTENT;
 178
 179         if ( monitor_cache_add( mi, e ) ) {
 180 #ifdef NEW_LOGGING
 181                 LDAP_LOG( OPERATION, CRIT,
 182                         "monitor_subsys_rww_init: "
 183                         "unable to add entry 'cn=Write,%s'\n",
 184                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
 185 #else
 186                 Debug( LDAP_DEBUG_ANY,
 187                         "monitor_subsys_rww_init: "
 188                         "unable to add entry 'cn=Write,%s'\n",
 189                         monitor_subsys[SLAPD_MONITOR_RWW].mss_ndn.bv_val, 0, 0 );
 190 #endif
 191                 return( -1 );
 192         }
 193
 194         e_tmp = e;
 195
 196         mp = ( struct monitorentrypriv * )e_conn->e_private;
 197         mp->mp_children = e_tmp;
 198
 199         monitor_cache_release( mi, e_conn );
 200
 201         return( 0 );
 202 }
 203
 204 int
 205 monitor_subsys_rww_update(
 206         Operation               *op,
 207         Entry                   *e
 208 )
 209 {
 210         struct monitorinfo *mi = (struct monitorinfo *)op->o_bd->be_private;
 211         Connection              *c;
 212         int                     connindex;
 213         long                    nconns, nwritewaiters, nreadwaiters;
 214
 215 #define RWW_NONE        0
 216 #define RWW_READ        1
 217 #define RWW_WRITE       2
 218         int                     type = RWW_NONE;
 219
 220         Attribute               *a;
 221         char                    buf[] = "+9223372036854775807L";
 222         long                    num = 0;
 223
 224         assert( mi != NULL );
 225         assert( e != NULL );
 226
 227         if ( strncasecmp( e->e_ndn, "cn=read",
 228                                 sizeof("cn=read")-1 ) == 0 ) {
 229                 type = RWW_READ;
 230
 231         } else if ( strncasecmp( e->e_ndn, "cn=write",
 232                                 sizeof("cn=write")-1 ) == 0 ) {
 233                 type = RWW_WRITE;
 234
 235         } else {
 236                 return( 0 );
 237         }
 238
 239         nconns = nwritewaiters = nreadwaiters = 0;
 240         for ( c = connection_first( &connindex );
 241                         c != NULL;
 242                         c = connection_next( c, &connindex ), nconns++ ) {
 243                 if ( c->c_writewaiter ) {
 244                         nwritewaiters++;
 245                 }
 246                 if ( c->c_currentber != NULL ) {
 247                         nreadwaiters++;
 248                 }
 249         }
 250         connection_done(c);
 251
 252         switch ( type ) {
 253         case RWW_READ:
 254                 num = nreadwaiters;
 255                 break;
 256
 257         case RWW_WRITE:
 258                 num = nwritewaiters;
 259                 break;
 260
 261         default:
 262                 assert( 0 );
 263         }
 264
 265         snprintf( buf, sizeof( buf ), "%ld", num );
 266
 267         a = attr_find( e->e_attrs, mi->mi_ad_monitorCounter );
 268         assert( a );
 269         free( a->a_vals[0].bv_val );
 270         ber_str2bv( buf, 0, 1, &a->a_vals[ 0 ] );
 271
 272         return( 0 );
 273 }
 274