openldap/servers/slapd/back-monitor/rww.c
Pierangelo Masarati 5fdba27288 This is the skeleton of back-monitor, the slapd monitoring backend.
The old monitoring stuff has been removed; the new backend is
enabled by using --enable-monitor at configure time and requires

	database monitor

in slapd.conf to be activated.  At present it implements a subset
of the old monitoring options, and it should be extendable to
a number of different subsystems.  The search operation has been
implementd; it does not honor abandon or size/time limits, though.
The compare and the abandon operations are planned.

Copyright Pierangelo Masarati <ando@sys-net.it>; the code is provided
AS IS with NO GUARANTEE.  It can be used and distributed under the
conditions stated by the OpenLDAP Public License.
2001-07-14 17:34:24 +00:00

135 lines
3.2 KiB
C

/* readw.c - deal with read waiters subsystem */
/*
* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/*
* Copyright 2001 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*
* Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
*
* This work has beed deveolped for the OpenLDAP Foundation
* in the hope that it may be useful to the Open Source community,
* but WITHOUT ANY WARRANTY.
*
* Permission is granted to anyone to use this software for any purpose
* on any computer system, and to alter it and redistribute it, subject
* to the following restrictions:
*
* 1. The author and SysNet s.n.c. are not responsible for the consequences
* of use of this software, no matter how awful, even if they arise from
* flaws in it.
*
* 2. The origin of this software must not be misrepresented, either by
* explicit claim or by omission. Since few users ever read sources,
* credits should appear in the documentation.
*
* 3. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software. Since few users
* ever read sources, credits should appear in the documentation.
* SysNet s.n.c. cannot be responsible for the consequences of the
* alterations.
*
* 4. This notice may not be removed or altered.
*/
#include "portable.h"
#include <stdio.h>
#include "slap.h"
#include "back-monitor.h"
static int monitor_subsys_readw_update_internal( struct monitorinfo *mi, Entry *e, int rw );
int
monitor_subsys_readw_update(
struct monitorinfo *mi,
Entry *e
)
{
return monitor_subsys_readw_update_internal( mi, e, 0 );
}
int
monitor_subsys_writew_update(
struct monitorinfo *mi,
Entry *e
)
{
return monitor_subsys_readw_update_internal( mi, e, 1 );
}
static int
monitor_subsys_readw_update_internal(
struct monitorinfo *mi,
Entry *e,
int rw
)
{
Connection *c;
int connindex;
int nconns, nwritewaiters, nreadwaiters;
Attribute *a;
struct berval *bv[2], val, **b = NULL;
char buf[1024];
char *str = NULL;
int num = 0;
bv[0] = &val;
bv[1] = NULL;
assert( mi != NULL );
assert( e != NULL );
bv[0] = &val;
bv[1] = NULL;
nconns = nwritewaiters = nreadwaiters = 0;
for ( c = connection_first( &connindex );
c != NULL;
c = connection_next( c, &connindex ), nconns++ ) {
if ( c->c_writewaiter ) {
nwritewaiters++;
}
if ( c->c_currentber != NULL ) {
nreadwaiters++;
}
}
connection_done(c);
switch ( rw ) {
case 0:
str = "read waiters";
num = nreadwaiters;
break;
case 1:
str = "write waiters";
num = nwritewaiters;
break;
}
snprintf( buf, sizeof( buf ), "%s=%d", str, num );
if ( ( a = attr_find( e->e_attrs, monitor_ad_desc ) ) != NULL ) {
for ( b = a->a_vals; b[0] != NULL; b++ ) {
if ( strncmp( b[0]->bv_val, str, strlen( str ) ) == 0 ) {
free( b[0]->bv_val );
b[0] = ber_bvstrdup( buf );
break;
}
}
}
if ( b == NULL || b[0] == NULL ) {
val.bv_val = buf;
val.bv_len = strlen( buf );
attr_merge( e, monitor_ad_desc, bv );
}
return( 0 );
}