/* $NetBSD: monitor.c,v 1.3 2021/08/14 16:15:00 christos Exp $ */ /* monitor.c - monitor mdb backend */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 2000-2021 The OpenLDAP Foundation. * 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 the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ #include __RCSID("$NetBSD: monitor.c,v 1.3 2021/08/14 16:15:00 christos Exp $"); #include "portable.h" #include #include #include #include #include #include #include "lutil.h" #include "back-mdb.h" #include "../back-monitor/back-monitor.h" #include "slap-config.h" static ObjectClass *oc_olmMDBDatabase; static AttributeDescription *ad_olmDbDirectory; #ifdef MDB_MONITOR_IDX static int mdb_monitor_idx_entry_add( struct mdb_info *mdb, Entry *e ); static AttributeDescription *ad_olmDbNotIndexed; #endif /* MDB_MONITOR_IDX */ static AttributeDescription *ad_olmMDBPagesMax, *ad_olmMDBPagesUsed, *ad_olmMDBPagesFree; static AttributeDescription *ad_olmMDBReadersMax, *ad_olmMDBReadersUsed; static AttributeDescription *ad_olmMDBEntries; /* * NOTE: there's some confusion in monitor OID arc; * by now, let's consider: * * Subsystems monitor attributes 1.3.6.1.4.1.4203.666.1.55.0 * Databases monitor attributes 1.3.6.1.4.1.4203.666.1.55.0.1 * MDB database monitor attributes 1.3.6.1.4.1.4203.666.1.55.0.1.3 * * Subsystems monitor objectclasses 1.3.6.1.4.1.4203.666.3.16.0 * Databases monitor objectclasses 1.3.6.1.4.1.4203.666.3.16.0.1 * MDB database monitor objectclasses 1.3.6.1.4.1.4203.666.3.16.0.1.3 */ static struct { char *name; char *oid; } s_oid[] = { { "olmMDBAttributes", "olmDatabaseAttributes:1" }, { "olmMDBObjectClasses", "olmDatabaseObjectClasses:1" }, { NULL } }; static struct { char *desc; AttributeDescription **ad; } s_at[] = { { "( olmDatabaseAttributes:1 " "NAME ( 'olmDbDirectory' ) " "DESC 'Path name of the directory " "where the database environment resides' " "SUP monitoredInfo " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmDbDirectory }, #ifdef MDB_MONITOR_IDX { "( olmDatabaseAttributes:2 " "NAME ( 'olmDbNotIndexed' ) " "DESC 'Missing indexes resulting from candidate selection' " "SUP monitoredInfo " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmDbNotIndexed }, #endif /* MDB_MONITOR_IDX */ { "( olmMDBAttributes:1 " "NAME ( 'olmMDBPagesMax' ) " "DESC 'Maximum number of pages' " "SUP monitorCounter " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmMDBPagesMax }, { "( olmMDBAttributes:2 " "NAME ( 'olmMDBPagesUsed' ) " "DESC 'Number of pages in use' " "SUP monitorCounter " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmMDBPagesUsed }, { "( olmMDBAttributes:3 " "NAME ( 'olmMDBPagesFree' ) " "DESC 'Number of free pages' " "SUP monitorCounter " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmMDBPagesFree }, { "( olmMDBAttributes:4 " "NAME ( 'olmMDBReadersMax' ) " "DESC 'Maximum number of readers' " "SUP monitorCounter " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmMDBReadersMax }, { "( olmMDBAttributes:5 " "NAME ( 'olmMDBReadersUsed' ) " "DESC 'Number of readers in use' " "SUP monitorCounter " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmMDBReadersUsed }, { "( olmMDBAttributes:6 " "NAME ( 'olmMDBEntries' ) " "DESC 'Number of entries in DB' " "SUP monitorCounter " "NO-USER-MODIFICATION " "USAGE dSAOperation )", &ad_olmMDBEntries }, { NULL } }; static struct { char *desc; ObjectClass **oc; } s_oc[] = { /* augments an existing object, so it must be AUXILIARY * FIXME: derive from some ABSTRACT "monitoredEntity"? */ { "( olmMDBObjectClasses:2 " "NAME ( 'olmMDBDatabase' ) " "SUP top AUXILIARY " "MAY ( " "olmDbDirectory " #ifdef MDB_MONITOR_IDX "$ olmDbNotIndexed " #endif /* MDB_MONITOR_IDX */ "$ olmMDBPagesMax $ olmMDBPagesUsed $ olmMDBPagesFree " "$ olmMDBReadersMax $ olmMDBReadersUsed $ olmMDBEntries " ") )", &oc_olmMDBDatabase }, { NULL } }; static int mdb_monitor_update( Operation *op, SlapReply *rs, Entry *e, void *priv ) { struct mdb_info *mdb = (struct mdb_info *) priv; Attribute *a; char buf[ BUFSIZ ]; struct berval bv; MDB_stat mst; MDB_envinfo mei; MDB_txn *txn; int rc; #ifdef MDB_MONITOR_IDX mdb_monitor_idx_entry_add( mdb, e ); #endif /* MDB_MONITOR_IDX */ mdb_env_stat( mdb->mi_dbenv, &mst ); mdb_env_info( mdb->mi_dbenv, &mei ); a = attr_find( e->e_attrs, ad_olmMDBPagesMax ); assert( a != NULL ); bv.bv_val = buf; bv.bv_len = snprintf( buf, sizeof( buf ), "%lu", mei.me_mapsize / mst.ms_psize ); ber_bvreplace( &a->a_vals[ 0 ], &bv ); a = attr_find( e->e_attrs, ad_olmMDBPagesUsed ); assert( a != NULL ); bv.bv_val = buf; bv.bv_len = snprintf( buf, sizeof( buf ), "%lu", mei.me_last_pgno+1 ); ber_bvreplace( &a->a_vals[ 0 ], &bv ); a = attr_find( e->e_attrs, ad_olmMDBReadersMax ); assert( a != NULL ); bv.bv_val = buf; bv.bv_len = snprintf( buf, sizeof( buf ), "%u", mei.me_maxreaders ); ber_bvreplace( &a->a_vals[ 0 ], &bv ); a = attr_find( e->e_attrs, ad_olmMDBReadersUsed ); assert( a != NULL ); bv.bv_val = buf; bv.bv_len = snprintf( buf, sizeof( buf ), "%u", mei.me_numreaders ); ber_bvreplace( &a->a_vals[ 0 ], &bv ); rc = mdb_txn_begin( mdb->mi_dbenv, NULL, MDB_RDONLY, &txn ); if ( !rc ) { MDB_cursor *cursor; MDB_val key, data; size_t pages = 0, *iptr; rc = mdb_cursor_open( txn, 0, &cursor ); if ( !rc ) { while (( rc = mdb_cursor_get( cursor, &key, &data, MDB_NEXT )) == 0 ) { iptr = data.mv_data; pages += *iptr; } mdb_cursor_close( cursor ); } mdb_stat( txn, mdb->mi_id2entry, &mst ); a = attr_find( e->e_attrs, ad_olmMDBEntries ); assert( a != NULL ); bv.bv_val = buf; bv.bv_len = snprintf( buf, sizeof( buf ), "%lu", mst.ms_entries ); ber_bvreplace( &a->a_vals[ 0 ], &bv ); mdb_txn_abort( txn ); a = attr_find( e->e_attrs, ad_olmMDBPagesFree ); assert( a != NULL ); bv.bv_val = buf; bv.bv_len = snprintf( buf, sizeof( buf ), "%lu", pages ); ber_bvreplace( &a->a_vals[ 0 ], &bv ); } return SLAP_CB_CONTINUE; } #if 0 /* uncomment if required */ static int mdb_monitor_modify( Operation *op, SlapReply *rs, Entry *e, void *priv ) { return SLAP_CB_CONTINUE; } #endif static int mdb_monitor_free( Entry *e, void **priv ) { struct berval values[ 2 ]; Modification mod = { 0 }; const char *text; char textbuf[ SLAP_TEXT_BUFLEN ]; int i, rc; /* NOTE: if slap_shutdown != 0, priv might have already been freed */ *priv = NULL; /* Remove objectClass */ mod.sm_op = LDAP_MOD_DELETE; mod.sm_desc = slap_schema.si_ad_objectClass; mod.sm_values = values; mod.sm_numvals = 1; values[ 0 ] = oc_olmMDBDatabase->soc_cname; BER_BVZERO( &values[ 1 ] ); rc = modify_delete_values( e, &mod, 1, &text, textbuf, sizeof( textbuf ) ); /* don't care too much about return code... */ /* remove attrs */ mod.sm_values = NULL; mod.sm_numvals = 0; for ( i = 0; s_at[ i ].desc != NULL; i++ ) { mod.sm_desc = *s_at[ i ].ad; rc = modify_delete_values( e, &mod, 1, &text, textbuf, sizeof( textbuf ) ); /* don't care too much about return code... */ } return SLAP_CB_CONTINUE; } /* * call from within mdb_initialize() */ static int mdb_monitor_initialize( void ) { int i, code; ConfigArgs c; char *argv[ 3 ]; static int mdb_monitor_initialized = 0; /* set to 0 when successfully initialized; otherwise, remember failure */ static int mdb_monitor_initialized_failure = 1; if ( mdb_monitor_initialized++ ) { return mdb_monitor_initialized_failure; } if ( backend_info( "monitor" ) == NULL ) { return -1; } /* register schema here */ argv[ 0 ] = "back-mdb monitor"; c.argv = argv; c.argc = 3; c.fname = argv[0]; for ( i = 0; s_oid[ i ].name; i++ ) { c.lineno = i; argv[ 1 ] = s_oid[ i ].name; argv[ 2 ] = s_oid[ i ].oid; if ( parse_oidm( &c, 0, NULL ) != 0 ) { Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(mdb_monitor_initialize) ": unable to add " "objectIdentifier \"%s=%s\"\n", s_oid[ i ].name, s_oid[ i ].oid ); return 2; } } for ( i = 0; s_at[ i ].desc != NULL; i++ ) { code = register_at( s_at[ i ].desc, s_at[ i ].ad, 1 ); if ( code != LDAP_SUCCESS ) { Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(mdb_monitor_initialize) ": register_at failed for attributeType (%s)\n", s_at[ i ].desc ); return 3; } else { (*s_at[ i ].ad)->ad_type->sat_flags |= SLAP_AT_HIDE; } } for ( i = 0; s_oc[ i ].desc != NULL; i++ ) { code = register_oc( s_oc[ i ].desc, s_oc[ i ].oc, 1 ); if ( code != LDAP_SUCCESS ) { Debug( LDAP_DEBUG_ANY, LDAP_XSTRING(mdb_monitor_initialize) ": register_oc failed for objectClass (%s)\n", s_oc[ i ].desc ); return 4; } else { (*s_oc[ i ].oc)->soc_flags |= SLAP_OC_HIDE; } } return ( mdb_monitor_initialized_failure = LDAP_SUCCESS ); } /* * call from within mdb_db_init() */ int mdb_monitor_db_init( BackendDB *be ) { #ifdef MDB_MONITOR_IDX struct mdb_info *mdb = (struct mdb_info *) be->be_private; #endif /* MDB_MONITOR_IDX */ if ( mdb_monitor_initialize() == LDAP_SUCCESS ) { /* monitoring in back-mdb is on by default */ SLAP_DBFLAGS( be ) |= SLAP_DBFLAG_MONITORING; } #ifdef MDB_MONITOR_IDX mdb->mi_idx = NULL; ldap_pvt_thread_mutex_init( &mdb->mi_idx_mutex ); #endif /* MDB_MONITOR_IDX */ return 0; } /* * call from within mdb_db_open() */ int mdb_monitor_db_open( BackendDB *be ) { struct mdb_info *mdb = (struct mdb_info *) be->be_private; Attribute *a, *next; monitor_callback_t *cb = NULL; int rc = 0; BackendInfo *mi; monitor_extra_t *mbe; if ( !SLAP_DBMONITORING( be ) ) { return 0; } mi = backend_info( "monitor" ); if ( !mi || !mi->bi_extra ) { SLAP_DBFLAGS( be ) ^= SLAP_DBFLAG_MONITORING; return 0; } mbe = mi->bi_extra; /* don't bother if monitor is not configured */ if ( !mbe->is_configured() ) { static int warning = 0; if ( warning++ == 0 ) { Debug( LDAP_DEBUG_CONFIG, LDAP_XSTRING(mdb_monitor_db_open) ": monitoring disabled; " "configure monitor database to enable\n" ); } return 0; } /* alloc as many as required (plus 1 for objectClass) */ a = attrs_alloc( 1 + 7 ); if ( a == NULL ) { rc = 1; goto cleanup; } a->a_desc = slap_schema.si_ad_objectClass; attr_valadd( a, &oc_olmMDBDatabase->soc_cname, NULL, 1 ); next = a->a_next; { struct berval bv = BER_BVC( "0" ); next->a_desc = ad_olmMDBPagesMax; attr_valadd( next, &bv, NULL, 1 ); next = next->a_next; next->a_desc = ad_olmMDBPagesUsed; attr_valadd( next, &bv, NULL, 1 ); next = next->a_next; next->a_desc = ad_olmMDBPagesFree; attr_valadd( next, &bv, NULL, 1 ); next = next->a_next; next->a_desc = ad_olmMDBReadersMax; attr_valadd( next, &bv, NULL, 1 ); next = next->a_next; next->a_desc = ad_olmMDBReadersUsed; attr_valadd( next, &bv, NULL, 1 ); next = next->a_next; next->a_desc = ad_olmMDBEntries; attr_valadd( next, &bv, NULL, 1 ); next = next->a_next; } { struct berval bv, nbv; ber_len_t pathlen = 0, len = 0; char path[ MAXPATHLEN ] = { '\0' }; char *fname = mdb->mi_dbenv_home, *ptr; len = strlen( fname ); if ( fname[ 0 ] != '/' ) { /* get full path name */ getcwd( path, sizeof( path ) ); pathlen = strlen( path ); if ( fname[ 0 ] == '.' && fname[ 1 ] == '/' ) { fname += 2; len -= 2; } } bv.bv_len = pathlen + STRLENOF( "/" ) + len; ptr = bv.bv_val = ch_malloc( bv.bv_len + STRLENOF( "/" ) + 1 ); if ( pathlen ) { ptr = lutil_strncopy( ptr, path, pathlen ); ptr[ 0 ] = '/'; ptr++; } ptr = lutil_strncopy( ptr, fname, len ); if ( ptr[ -1 ] != '/' ) { ptr[ 0 ] = '/'; ptr++; } ptr[ 0 ] = '\0'; attr_normalize_one( ad_olmDbDirectory, &bv, &nbv, NULL ); next->a_desc = ad_olmDbDirectory; next->a_vals = ch_calloc( sizeof( struct berval ), 2 ); next->a_vals[ 0 ] = bv; next->a_numvals = 1; if ( BER_BVISNULL( &nbv ) ) { next->a_nvals = next->a_vals; } else { next->a_nvals = ch_calloc( sizeof( struct berval ), 2 ); next->a_nvals[ 0 ] = nbv; } next = next->a_next; } cb = ch_calloc( sizeof( monitor_callback_t ), 1 ); cb->mc_update = mdb_monitor_update; #if 0 /* uncomment if required */ cb->mc_modify = mdb_monitor_modify; #endif cb->mc_free = mdb_monitor_free; cb->mc_private = (void *)mdb; /* make sure the database is registered; then add monitor attributes */ rc = mbe->register_database( be, &mdb->mi_monitor.mdm_ndn ); if ( rc == 0 ) { rc = mbe->register_entry_attrs( &mdb->mi_monitor.mdm_ndn, a, cb, NULL, -1, NULL ); } cleanup:; if ( rc != 0 ) { if ( cb != NULL ) { ch_free( cb ); cb = NULL; } if ( a != NULL ) { attrs_free( a ); a = NULL; } } /* store for cleanup */ mdb->mi_monitor.mdm_cb = (void *)cb; /* we don't need to keep track of the attributes, because * mdb_monitor_free() takes care of everything */ if ( a != NULL ) { attrs_free( a ); } return rc; } /* * call from within mdb_db_close() */ int mdb_monitor_db_close( BackendDB *be ) { struct mdb_info *mdb = (struct mdb_info *) be->be_private; if ( !BER_BVISNULL( &mdb->mi_monitor.mdm_ndn ) ) { BackendInfo *mi = backend_info( "monitor" ); monitor_extra_t *mbe; if ( mi && mi->bi_extra ) { mbe = mi->bi_extra; mbe->unregister_entry_callback( &mdb->mi_monitor.mdm_ndn, (monitor_callback_t *)mdb->mi_monitor.mdm_cb, NULL, 0, NULL ); } memset( &mdb->mi_monitor, 0, sizeof( mdb->mi_monitor ) ); } return 0; } /* * call from within mdb_db_destroy() */ int mdb_monitor_db_destroy( BackendDB *be ) { #ifdef MDB_MONITOR_IDX struct mdb_info *mdb = (struct mdb_info *) be->be_private; /* TODO: free tree */ ldap_pvt_thread_mutex_destroy( &mdb->mi_idx_mutex ); ldap_avl_free( mdb->mi_idx, ch_free ); #endif /* MDB_MONITOR_IDX */ return 0; } #ifdef MDB_MONITOR_IDX #define MDB_MONITOR_IDX_TYPES (4) typedef struct monitor_idx_t monitor_idx_t; struct monitor_idx_t { AttributeDescription *idx_ad; unsigned long idx_count[MDB_MONITOR_IDX_TYPES]; }; static int mdb_monitor_bitmask2key( slap_mask_t bitmask ) { int key; for ( key = 0; key < 8 * (int)sizeof(slap_mask_t) && !( bitmask & 0x1U ); key++ ) bitmask >>= 1; return key; } static struct berval idxbv[] = { BER_BVC( "present=" ), BER_BVC( "equality=" ), BER_BVC( "approx=" ), BER_BVC( "substr=" ), BER_BVNULL }; static ber_len_t mdb_monitor_idx2len( monitor_idx_t *idx ) { int i; ber_len_t len = 0; for ( i = 0; i < MDB_MONITOR_IDX_TYPES; i++ ) { if ( idx->idx_count[ i ] != 0 ) { len += idxbv[i].bv_len; } } return len; } static int monitor_idx_cmp( const void *p1, const void *p2 ) { const monitor_idx_t *idx1 = (const monitor_idx_t *)p1; const monitor_idx_t *idx2 = (const monitor_idx_t *)p2; return SLAP_PTRCMP( idx1->idx_ad, idx2->idx_ad ); } static int monitor_idx_dup( void *p1, void *p2 ) { monitor_idx_t *idx1 = (monitor_idx_t *)p1; monitor_idx_t *idx2 = (monitor_idx_t *)p2; return SLAP_PTRCMP( idx1->idx_ad, idx2->idx_ad ) == 0 ? -1 : 0; } int mdb_monitor_idx_add( struct mdb_info *mdb, AttributeDescription *desc, slap_mask_t type ) { monitor_idx_t idx_dummy = { 0 }, *idx; int rc = 0, key; idx_dummy.idx_ad = desc; key = mdb_monitor_bitmask2key( type ) - 1; if ( key >= MDB_MONITOR_IDX_TYPES ) { /* invalid index type */ return -1; } ldap_pvt_thread_mutex_lock( &mdb->mi_idx_mutex ); idx = (monitor_idx_t *)ldap_avl_find( mdb->mi_idx, (caddr_t)&idx_dummy, monitor_idx_cmp ); if ( idx == NULL ) { idx = (monitor_idx_t *)ch_calloc( sizeof( monitor_idx_t ), 1 ); idx->idx_ad = desc; idx->idx_count[ key ] = 1; switch ( ldap_avl_insert( &mdb->mi_idx, (caddr_t)idx, monitor_idx_cmp, monitor_idx_dup ) ) { case 0: break; default: ch_free( idx ); rc = -1; } } else { idx->idx_count[ key ]++; } ldap_pvt_thread_mutex_unlock( &mdb->mi_idx_mutex ); return rc; } static int mdb_monitor_idx_apply( void *v_idx, void *v_valp ) { monitor_idx_t *idx = (monitor_idx_t *)v_idx; BerVarray *valp = (BerVarray *)v_valp; struct berval bv; char *ptr; char count_buf[ MDB_MONITOR_IDX_TYPES ][ SLAP_TEXT_BUFLEN ]; ber_len_t count_len[ MDB_MONITOR_IDX_TYPES ], idx_len; int i, num = 0; idx_len = mdb_monitor_idx2len( idx ); bv.bv_len = 0; for ( i = 0; i < MDB_MONITOR_IDX_TYPES; i++ ) { if ( idx->idx_count[ i ] == 0 ) { continue; } count_len[ i ] = snprintf( count_buf[ i ], sizeof( count_buf[ i ] ), "%lu", idx->idx_count[ i ] ); bv.bv_len += count_len[ i ]; num++; } bv.bv_len += idx->idx_ad->ad_cname.bv_len + num + idx_len; ptr = bv.bv_val = ch_malloc( bv.bv_len + 1 ); ptr = lutil_strcopy( ptr, idx->idx_ad->ad_cname.bv_val ); for ( i = 0; i < MDB_MONITOR_IDX_TYPES; i++ ) { if ( idx->idx_count[ i ] == 0 ) { continue; } ptr[ 0 ] = '#'; ++ptr; ptr = lutil_strcopy( ptr, idxbv[ i ].bv_val ); ptr = lutil_strcopy( ptr, count_buf[ i ] ); } ber_bvarray_add( valp, &bv ); return 0; } static int mdb_monitor_idx_entry_add( struct mdb_info *mdb, Entry *e ) { BerVarray vals = NULL; Attribute *a; a = attr_find( e->e_attrs, ad_olmDbNotIndexed ); ldap_pvt_thread_mutex_lock( &mdb->mi_idx_mutex ); ldap_avl_apply( mdb->mi_idx, mdb_monitor_idx_apply, &vals, -1, AVL_INORDER ); ldap_pvt_thread_mutex_unlock( &mdb->mi_idx_mutex ); if ( vals != NULL ) { if ( a != NULL ) { assert( a->a_nvals == a->a_vals ); ber_bvarray_free( a->a_vals ); } else { Attribute **ap; for ( ap = &e->e_attrs; *ap != NULL; ap = &(*ap)->a_next ) ; *ap = attr_alloc( ad_olmDbNotIndexed ); a = *ap; } a->a_vals = vals; a->a_nvals = a->a_vals; } return 0; } #endif /* MDB_MONITOR_IDX */