1 /* readw.c - deal with read waiters subsystem */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 2001-2005 The OpenLDAP Foundation.
6 * Portions Copyright 2001-2003 Pierangelo Masarati.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
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>.
18 * This work was initially developed by Pierangelo Masarati for inclusion
19 * in OpenLDAP Software.
25 #include <ac/string.h>
29 #include "back-monitor.h"
32 monitor_subsys_rww_update(
44 struct monitor_rww_t {
48 { BER_BVC("cn=Read"), BER_BVNULL },
49 { BER_BVC("cn=Write"), BER_BVNULL },
50 { BER_BVNULL, BER_BVNULL }
54 monitor_subsys_rww_init(
67 ms->mss_update = monitor_subsys_rww_update;
69 mi = ( monitor_info_t * )be->be_private;
71 if ( monitor_cache_get( mi, &ms->mss_ndn, &e_conn ) ) {
72 Debug( LDAP_DEBUG_ANY,
73 "monitor_subsys_rww_init: "
74 "unable to get entry \"%s\"\n",
75 ms->mss_ndn.bv_val, 0, 0 );
79 mp = ( monitor_entry_t * )e_conn->e_private;
80 mp->mp_children = NULL;
81 ep = &mp->mp_children;
83 for ( i = 0; i < MONITOR_RWW_LAST; i++ ) {
84 char buf[ BACKMONITOR_BUFSIZE ];
85 struct berval nrdn, bv;
88 snprintf( buf, sizeof( buf ),
91 "structuralObjectClass: %s\n"
95 "createTimestamp: %s\n"
96 "modifyTimestamp: %s\n",
97 monitor_rww[ i ].rdn.bv_val,
99 mi->mi_oc_monitorCounterObject->soc_cname.bv_val,
100 mi->mi_oc_monitorCounterObject->soc_cname.bv_val,
101 &monitor_rww[ i ].rdn.bv_val[ STRLENOF( "cn=" ) ],
102 mi->mi_creatorsName.bv_val,
103 mi->mi_creatorsName.bv_val,
104 mi->mi_startTime.bv_val,
105 mi->mi_startTime.bv_val );
107 e = str2entry( buf );
109 Debug( LDAP_DEBUG_ANY,
110 "monitor_subsys_rww_init: "
111 "unable to create entry \"cn=Read,%s\"\n",
112 ms->mss_ndn.bv_val, 0, 0 );
116 /* steal normalized RDN */
117 dnRdn( &e->e_nname, &nrdn );
118 ber_dupbv( &monitor_rww[ i ].nrdn, &nrdn );
120 BER_BVSTR( &bv, "0" );
121 attr_merge_one( e, mi->mi_ad_monitorCounter, &bv, &bv );
123 mp = monitor_entrypriv_create();
127 e->e_private = ( void * )mp;
129 mp->mp_flags = ms->mss_flags \
130 | MONITOR_F_SUB | MONITOR_F_PERSISTENT;
132 if ( monitor_cache_add( mi, e ) ) {
133 Debug( LDAP_DEBUG_ANY,
134 "monitor_subsys_rww_init: "
135 "unable to add entry \"%s,%s\"\n",
136 monitor_rww[ i ].rdn.bv_val,
137 ms->mss_ndn.bv_val, 0 );
145 monitor_cache_release( mi, e_conn );
151 monitor_subsys_rww_update(
156 monitor_info_t *mi = (monitor_info_t *)op->o_bd->be_private;
159 long nconns, nwritewaiters, nreadwaiters;
165 char buf[] = "+9223372036854775807L";
169 assert( mi != NULL );
172 dnRdn( &e->e_nname, &nrdn );
174 for ( i = 0; !BER_BVISNULL( &monitor_rww[ i ].nrdn ); i++ ) {
175 if ( dn_match( &nrdn, &monitor_rww[ i ].nrdn ) ) {
180 if ( i == MONITOR_RWW_LAST ) {
181 return SLAP_CB_CONTINUE;
184 nconns = nwritewaiters = nreadwaiters = 0;
185 for ( c = connection_first( &connindex );
187 c = connection_next( c, &connindex ), nconns++ )
189 if ( c->c_writewaiter ) {
194 if ( c->c_currentber != NULL ) {
201 case MONITOR_RWW_READ:
205 case MONITOR_RWW_WRITE:
213 snprintf( buf, sizeof( buf ), "%ld", num );
215 a = attr_find( e->e_attrs, mi->mi_ad_monitorCounter );
218 if ( len > a->a_vals[ 0 ].bv_len ) {
219 a->a_vals[ 0 ].bv_val = ber_memrealloc( a->a_vals[ 0 ].bv_val, len + 1 );
220 if ( BER_BVISNULL( &a->a_vals[ 0 ] ) ) {
221 BER_BVZERO( &a->a_vals[ 0 ] );
222 return SLAP_CB_CONTINUE;
225 AC_MEMCPY( a->a_vals[ 0 ].bv_val, buf, len + 1 );
226 a->a_vals[ 0 ].bv_len = len;
228 /* FIXME: touch modifyTimestamp? */
230 return SLAP_CB_CONTINUE;